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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 09:22:09 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 09:22:09 +0000
commit43a97878ce14b72f0981164f87f2e35e14151312 (patch)
tree620249daf56c0258faa40cbdcf9cfba06de2a846 /testing/web-platform/tests/html/canvas/offscreen
parentInitial commit. (diff)
downloadfirefox-43a97878ce14b72f0981164f87f2e35e14151312.tar.xz
firefox-43a97878ce14b72f0981164f87f2e35e14151312.zip
Adding upstream version 110.0.1.upstream/110.0.1upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'testing/web-platform/tests/html/canvas/offscreen')
-rw-r--r--testing/web-platform/tests/html/canvas/offscreen/2d.conformance.requirements.basics.html62
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-rw-r--r--testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.canvas.html35
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-rw-r--r--testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.invalid.html34
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-rw-r--r--testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.range.html36
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-rw-r--r--testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.copy.html44
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-rw-r--r--testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.destination-atop.html44
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-rw-r--r--testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.operation.casesensitive.html29
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-rw-r--r--testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.operation.clear.html29
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diff --git a/testing/web-platform/tests/html/canvas/offscreen/2d.conformance.requirements.basics.html b/testing/web-platform/tests/html/canvas/offscreen/2d.conformance.requirements.basics.html
new file mode 100644
index 0000000000..a89ec10f9b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/2d.conformance.requirements.basics.html
@@ -0,0 +1,62 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.conformance.requirements.basics</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.conformance.requirements.basics</h1>
+<p class="desc">void methods return undefined</p>
+
+<p class="notes">Defined in "Web IDL" (draft)
+<script>
+var t = async_test("void methods return undefined");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertSame(ctx.save(), undefined, "ctx.save()", "undefined");
+_assertSame(ctx.restore(), undefined, "ctx.restore()", "undefined");
+_assertSame(ctx.scale(1, 1), undefined, "ctx.scale(1, 1)", "undefined");
+_assertSame(ctx.rotate(0), undefined, "ctx.rotate(0)", "undefined");
+_assertSame(ctx.translate(0, 0), undefined, "ctx.translate(0, 0)", "undefined");
+if (ctx.transform) { // (avoid spurious failures, since the aim here is not to test that all features are supported)
+ _assertSame(ctx.transform(1, 0, 0, 1, 0, 0), undefined, "ctx.transform(1, 0, 0, 1, 0, 0)", "undefined");
+}
+if (ctx.setTransform) {
+ _assertSame(ctx.setTransform(1, 0, 0, 1, 0, 0), undefined, "ctx.setTransform(1, 0, 0, 1, 0, 0)", "undefined");
+ _assertSame(ctx.setTransform(), undefined, "ctx.setTransform()", "undefined");
+}
+_assertSame(ctx.clearRect(0, 0, 0, 0), undefined, "ctx.clearRect(0, 0, 0, 0)", "undefined");
+_assertSame(ctx.fillRect(0, 0, 0, 0), undefined, "ctx.fillRect(0, 0, 0, 0)", "undefined");
+_assertSame(ctx.strokeRect(0, 0, 0, 0), undefined, "ctx.strokeRect(0, 0, 0, 0)", "undefined");
+_assertSame(ctx.beginPath(), undefined, "ctx.beginPath()", "undefined");
+_assertSame(ctx.closePath(), undefined, "ctx.closePath()", "undefined");
+_assertSame(ctx.moveTo(0, 0), undefined, "ctx.moveTo(0, 0)", "undefined");
+_assertSame(ctx.lineTo(0, 0), undefined, "ctx.lineTo(0, 0)", "undefined");
+_assertSame(ctx.quadraticCurveTo(0, 0, 0, 0), undefined, "ctx.quadraticCurveTo(0, 0, 0, 0)", "undefined");
+_assertSame(ctx.bezierCurveTo(0, 0, 0, 0, 0, 0), undefined, "ctx.bezierCurveTo(0, 0, 0, 0, 0, 0)", "undefined");
+_assertSame(ctx.arcTo(0, 0, 0, 0, 1), undefined, "ctx.arcTo(0, 0, 0, 0, 1)", "undefined");
+_assertSame(ctx.rect(0, 0, 0, 0), undefined, "ctx.rect(0, 0, 0, 0)", "undefined");
+_assertSame(ctx.arc(0, 0, 1, 0, 0, true), undefined, "ctx.arc(0, 0, 1, 0, 0, true)", "undefined");
+_assertSame(ctx.fill(), undefined, "ctx.fill()", "undefined");
+_assertSame(ctx.stroke(), undefined, "ctx.stroke()", "undefined");
+_assertSame(ctx.clip(), undefined, "ctx.clip()", "undefined");
+if (ctx.fillText) {
+ _assertSame(ctx.fillText('test', 0, 0), undefined, "ctx.fillText('test', 0, 0)", "undefined");
+ _assertSame(ctx.strokeText('test', 0, 0), undefined, "ctx.strokeText('test', 0, 0)", "undefined");
+}
+if (ctx.putImageData) {
+ _assertSame(ctx.putImageData(ctx.getImageData(0, 0, 1, 1), 0, 0), undefined, "ctx.putImageData(ctx.getImageData(0, 0, 1, 1), 0, 0)", "undefined");
+}
+_assertSame(ctx.drawImage(canvas, 0, 0, 1, 1, 0, 0, 0, 0), undefined, "ctx.drawImage(canvas, 0, 0, 1, 1, 0, 0, 0, 0)", "undefined");
+_assertSame(ctx.createLinearGradient(0, 0, 0, 0).addColorStop(0, 'white'), undefined, "ctx.createLinearGradient(0, 0, 0, 0).addColorStop(0, 'white')", "undefined");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/2d.conformance.requirements.basics.worker.js b/testing/web-platform/tests/html/canvas/offscreen/2d.conformance.requirements.basics.worker.js
new file mode 100644
index 0000000000..8d6ddc894f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/2d.conformance.requirements.basics.worker.js
@@ -0,0 +1,58 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.conformance.requirements.basics
+// Description:void methods return undefined
+// Note:<p class="notes">Defined in "Web IDL" (draft)
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("void methods return undefined");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertSame(ctx.save(), undefined, "ctx.save()", "undefined");
+_assertSame(ctx.restore(), undefined, "ctx.restore()", "undefined");
+_assertSame(ctx.scale(1, 1), undefined, "ctx.scale(1, 1)", "undefined");
+_assertSame(ctx.rotate(0), undefined, "ctx.rotate(0)", "undefined");
+_assertSame(ctx.translate(0, 0), undefined, "ctx.translate(0, 0)", "undefined");
+if (ctx.transform) { // (avoid spurious failures, since the aim here is not to test that all features are supported)
+ _assertSame(ctx.transform(1, 0, 0, 1, 0, 0), undefined, "ctx.transform(1, 0, 0, 1, 0, 0)", "undefined");
+}
+if (ctx.setTransform) {
+ _assertSame(ctx.setTransform(1, 0, 0, 1, 0, 0), undefined, "ctx.setTransform(1, 0, 0, 1, 0, 0)", "undefined");
+ _assertSame(ctx.setTransform(), undefined, "ctx.setTransform()", "undefined");
+}
+_assertSame(ctx.clearRect(0, 0, 0, 0), undefined, "ctx.clearRect(0, 0, 0, 0)", "undefined");
+_assertSame(ctx.fillRect(0, 0, 0, 0), undefined, "ctx.fillRect(0, 0, 0, 0)", "undefined");
+_assertSame(ctx.strokeRect(0, 0, 0, 0), undefined, "ctx.strokeRect(0, 0, 0, 0)", "undefined");
+_assertSame(ctx.beginPath(), undefined, "ctx.beginPath()", "undefined");
+_assertSame(ctx.closePath(), undefined, "ctx.closePath()", "undefined");
+_assertSame(ctx.moveTo(0, 0), undefined, "ctx.moveTo(0, 0)", "undefined");
+_assertSame(ctx.lineTo(0, 0), undefined, "ctx.lineTo(0, 0)", "undefined");
+_assertSame(ctx.quadraticCurveTo(0, 0, 0, 0), undefined, "ctx.quadraticCurveTo(0, 0, 0, 0)", "undefined");
+_assertSame(ctx.bezierCurveTo(0, 0, 0, 0, 0, 0), undefined, "ctx.bezierCurveTo(0, 0, 0, 0, 0, 0)", "undefined");
+_assertSame(ctx.arcTo(0, 0, 0, 0, 1), undefined, "ctx.arcTo(0, 0, 0, 0, 1)", "undefined");
+_assertSame(ctx.rect(0, 0, 0, 0), undefined, "ctx.rect(0, 0, 0, 0)", "undefined");
+_assertSame(ctx.arc(0, 0, 1, 0, 0, true), undefined, "ctx.arc(0, 0, 1, 0, 0, true)", "undefined");
+_assertSame(ctx.fill(), undefined, "ctx.fill()", "undefined");
+_assertSame(ctx.stroke(), undefined, "ctx.stroke()", "undefined");
+_assertSame(ctx.clip(), undefined, "ctx.clip()", "undefined");
+if (ctx.fillText) {
+ _assertSame(ctx.fillText('test', 0, 0), undefined, "ctx.fillText('test', 0, 0)", "undefined");
+ _assertSame(ctx.strokeText('test', 0, 0), undefined, "ctx.strokeText('test', 0, 0)", "undefined");
+}
+if (ctx.putImageData) {
+ _assertSame(ctx.putImageData(ctx.getImageData(0, 0, 1, 1), 0, 0), undefined, "ctx.putImageData(ctx.getImageData(0, 0, 1, 1), 0, 0)", "undefined");
+}
+_assertSame(ctx.drawImage(canvas, 0, 0, 1, 1, 0, 0, 0, 0), undefined, "ctx.drawImage(canvas, 0, 0, 1, 1, 0, 0, 0, 0)", "undefined");
+_assertSame(ctx.createLinearGradient(0, 0, 0, 0).addColorStop(0, 'white'), undefined, "ctx.createLinearGradient(0, 0, 0, 0).addColorStop(0, 'white')", "undefined");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/2d.conformance.requirements.missingargs.html b/testing/web-platform/tests/html/canvas/offscreen/2d.conformance.requirements.missingargs.html
new file mode 100644
index 0000000000..cfbbca9e5e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/2d.conformance.requirements.missingargs.html
@@ -0,0 +1,141 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.conformance.requirements.missingargs</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.conformance.requirements.missingargs</h1>
+<p class="desc">Missing arguments cause TypeError</p>
+
+
+<script>
+var t = async_test("Missing arguments cause TypeError");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_js(TypeError, function() { ctx.scale(); });
+assert_throws_js(TypeError, function() { ctx.scale(1); });
+assert_throws_js(TypeError, function() { ctx.rotate(); });
+assert_throws_js(TypeError, function() { ctx.translate(); });
+assert_throws_js(TypeError, function() { ctx.translate(0); });
+if (ctx.transform) { // (avoid spurious failures, since the aim here is not to test that all features are supported)
+ assert_throws_js(TypeError, function() { ctx.transform(); });
+ assert_throws_js(TypeError, function() { ctx.transform(1); });
+ assert_throws_js(TypeError, function() { ctx.transform(1, 0); });
+ assert_throws_js(TypeError, function() { ctx.transform(1, 0, 0); });
+ assert_throws_js(TypeError, function() { ctx.transform(1, 0, 0, 1); });
+ assert_throws_js(TypeError, function() { ctx.transform(1, 0, 0, 1, 0); });
+}
+if (ctx.setTransform) {
+ assert_throws_js(TypeError, function() { ctx.setTransform(1); });
+ assert_throws_js(TypeError, function() { ctx.setTransform(1, 0); });
+ assert_throws_js(TypeError, function() { ctx.setTransform(1, 0, 0); });
+ assert_throws_js(TypeError, function() { ctx.setTransform(1, 0, 0, 1); });
+ assert_throws_js(TypeError, function() { ctx.setTransform(1, 0, 0, 1, 0); });
+}
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(); });
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(0); });
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(0, 0); });
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(0, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0, 1, 0); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0, 1, 0, 0); });
+assert_throws_js(TypeError, function() { ctx.createPattern(canvas); });
+assert_throws_js(TypeError, function() { ctx.clearRect(); });
+assert_throws_js(TypeError, function() { ctx.clearRect(0); });
+assert_throws_js(TypeError, function() { ctx.clearRect(0, 0); });
+assert_throws_js(TypeError, function() { ctx.clearRect(0, 0, 0); });
+assert_throws_js(TypeError, function() { ctx.fillRect(); });
+assert_throws_js(TypeError, function() { ctx.fillRect(0); });
+assert_throws_js(TypeError, function() { ctx.fillRect(0, 0); });
+assert_throws_js(TypeError, function() { ctx.fillRect(0, 0, 0); });
+assert_throws_js(TypeError, function() { ctx.strokeRect(); });
+assert_throws_js(TypeError, function() { ctx.strokeRect(0); });
+assert_throws_js(TypeError, function() { ctx.strokeRect(0, 0); });
+assert_throws_js(TypeError, function() { ctx.strokeRect(0, 0, 0); });
+assert_throws_js(TypeError, function() { ctx.moveTo(); });
+assert_throws_js(TypeError, function() { ctx.moveTo(0); });
+assert_throws_js(TypeError, function() { ctx.lineTo(); });
+assert_throws_js(TypeError, function() { ctx.lineTo(0); });
+assert_throws_js(TypeError, function() { ctx.quadraticCurveTo(); });
+assert_throws_js(TypeError, function() { ctx.quadraticCurveTo(0); });
+assert_throws_js(TypeError, function() { ctx.quadraticCurveTo(0, 0); });
+assert_throws_js(TypeError, function() { ctx.quadraticCurveTo(0, 0, 0); });
+assert_throws_js(TypeError, function() { ctx.bezierCurveTo(); });
+assert_throws_js(TypeError, function() { ctx.bezierCurveTo(0); });
+assert_throws_js(TypeError, function() { ctx.bezierCurveTo(0, 0); });
+assert_throws_js(TypeError, function() { ctx.bezierCurveTo(0, 0, 0); });
+assert_throws_js(TypeError, function() { ctx.bezierCurveTo(0, 0, 0, 0); });
+assert_throws_js(TypeError, function() { ctx.bezierCurveTo(0, 0, 0, 0, 0); });
+assert_throws_js(TypeError, function() { ctx.arcTo(); });
+assert_throws_js(TypeError, function() { ctx.arcTo(0); });
+assert_throws_js(TypeError, function() { ctx.arcTo(0, 0); });
+assert_throws_js(TypeError, function() { ctx.arcTo(0, 0, 0); });
+assert_throws_js(TypeError, function() { ctx.arcTo(0, 0, 0, 0); });
+assert_throws_js(TypeError, function() { ctx.rect(); });
+assert_throws_js(TypeError, function() { ctx.rect(0); });
+assert_throws_js(TypeError, function() { ctx.rect(0, 0); });
+assert_throws_js(TypeError, function() { ctx.rect(0, 0, 0); });
+assert_throws_js(TypeError, function() { ctx.arc(); });
+assert_throws_js(TypeError, function() { ctx.arc(0); });
+assert_throws_js(TypeError, function() { ctx.arc(0, 0); });
+assert_throws_js(TypeError, function() { ctx.arc(0, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.arc(0, 0, 1, 0); });
+// (6th argument to arc is optional)
+if (ctx.isPointInPath) {
+ assert_throws_js(TypeError, function() { ctx.isPointInPath(); });
+ assert_throws_js(TypeError, function() { ctx.isPointInPath(0); });
+}
+if (ctx.drawFocusRing) {
+ assert_throws_js(TypeError, function() { ctx.drawFocusRing(); });
+ assert_throws_js(TypeError, function() { ctx.drawFocusRing(canvas); });
+ assert_throws_js(TypeError, function() { ctx.drawFocusRing(canvas, 0); });
+}
+if (ctx.fillText) {
+ assert_throws_js(TypeError, function() { ctx.fillText(); });
+ assert_throws_js(TypeError, function() { ctx.fillText('test'); });
+ assert_throws_js(TypeError, function() { ctx.fillText('test', 0); });
+ assert_throws_js(TypeError, function() { ctx.strokeText(); });
+ assert_throws_js(TypeError, function() { ctx.strokeText('test'); });
+ assert_throws_js(TypeError, function() { ctx.strokeText('test', 0); });
+ assert_throws_js(TypeError, function() { ctx.measureText(); });
+}
+assert_throws_js(TypeError, function() { ctx.drawImage(); });
+assert_throws_js(TypeError, function() { ctx.drawImage(canvas); });
+assert_throws_js(TypeError, function() { ctx.drawImage(canvas, 0); });
+// TODO: n >= 3 args on drawImage could be either a valid overload,
+// or too few for another overload, or too many for another
+// overload - what should happen?
+if (ctx.createImageData) {
+ assert_throws_js(TypeError, function() { ctx.createImageData(); });
+ assert_throws_js(TypeError, function() { ctx.createImageData(1); });
+}
+if (ctx.getImageData) {
+ assert_throws_js(TypeError, function() { ctx.getImageData(); });
+ assert_throws_js(TypeError, function() { ctx.getImageData(0); });
+ assert_throws_js(TypeError, function() { ctx.getImageData(0, 0); });
+ assert_throws_js(TypeError, function() { ctx.getImageData(0, 0, 1); });
+}
+if (ctx.putImageData) {
+ var imgdata = ctx.getImageData(0, 0, 1, 1);
+ assert_throws_js(TypeError, function() { ctx.putImageData(); });
+ assert_throws_js(TypeError, function() { ctx.putImageData(imgdata); });
+ assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 0); });
+}
+var g = ctx.createLinearGradient(0, 0, 0, 0);
+assert_throws_js(TypeError, function() { g.addColorStop(); });
+assert_throws_js(TypeError, function() { g.addColorStop(0); });
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/2d.conformance.requirements.missingargs.worker.js b/testing/web-platform/tests/html/canvas/offscreen/2d.conformance.requirements.missingargs.worker.js
new file mode 100644
index 0000000000..fe1b111f05
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/2d.conformance.requirements.missingargs.worker.js
@@ -0,0 +1,137 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.conformance.requirements.missingargs
+// Description:Missing arguments cause TypeError
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Missing arguments cause TypeError");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_js(TypeError, function() { ctx.scale(); });
+assert_throws_js(TypeError, function() { ctx.scale(1); });
+assert_throws_js(TypeError, function() { ctx.rotate(); });
+assert_throws_js(TypeError, function() { ctx.translate(); });
+assert_throws_js(TypeError, function() { ctx.translate(0); });
+if (ctx.transform) { // (avoid spurious failures, since the aim here is not to test that all features are supported)
+ assert_throws_js(TypeError, function() { ctx.transform(); });
+ assert_throws_js(TypeError, function() { ctx.transform(1); });
+ assert_throws_js(TypeError, function() { ctx.transform(1, 0); });
+ assert_throws_js(TypeError, function() { ctx.transform(1, 0, 0); });
+ assert_throws_js(TypeError, function() { ctx.transform(1, 0, 0, 1); });
+ assert_throws_js(TypeError, function() { ctx.transform(1, 0, 0, 1, 0); });
+}
+if (ctx.setTransform) {
+ assert_throws_js(TypeError, function() { ctx.setTransform(1); });
+ assert_throws_js(TypeError, function() { ctx.setTransform(1, 0); });
+ assert_throws_js(TypeError, function() { ctx.setTransform(1, 0, 0); });
+ assert_throws_js(TypeError, function() { ctx.setTransform(1, 0, 0, 1); });
+ assert_throws_js(TypeError, function() { ctx.setTransform(1, 0, 0, 1, 0); });
+}
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(); });
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(0); });
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(0, 0); });
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(0, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0, 1, 0); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0, 1, 0, 0); });
+assert_throws_js(TypeError, function() { ctx.createPattern(canvas); });
+assert_throws_js(TypeError, function() { ctx.clearRect(); });
+assert_throws_js(TypeError, function() { ctx.clearRect(0); });
+assert_throws_js(TypeError, function() { ctx.clearRect(0, 0); });
+assert_throws_js(TypeError, function() { ctx.clearRect(0, 0, 0); });
+assert_throws_js(TypeError, function() { ctx.fillRect(); });
+assert_throws_js(TypeError, function() { ctx.fillRect(0); });
+assert_throws_js(TypeError, function() { ctx.fillRect(0, 0); });
+assert_throws_js(TypeError, function() { ctx.fillRect(0, 0, 0); });
+assert_throws_js(TypeError, function() { ctx.strokeRect(); });
+assert_throws_js(TypeError, function() { ctx.strokeRect(0); });
+assert_throws_js(TypeError, function() { ctx.strokeRect(0, 0); });
+assert_throws_js(TypeError, function() { ctx.strokeRect(0, 0, 0); });
+assert_throws_js(TypeError, function() { ctx.moveTo(); });
+assert_throws_js(TypeError, function() { ctx.moveTo(0); });
+assert_throws_js(TypeError, function() { ctx.lineTo(); });
+assert_throws_js(TypeError, function() { ctx.lineTo(0); });
+assert_throws_js(TypeError, function() { ctx.quadraticCurveTo(); });
+assert_throws_js(TypeError, function() { ctx.quadraticCurveTo(0); });
+assert_throws_js(TypeError, function() { ctx.quadraticCurveTo(0, 0); });
+assert_throws_js(TypeError, function() { ctx.quadraticCurveTo(0, 0, 0); });
+assert_throws_js(TypeError, function() { ctx.bezierCurveTo(); });
+assert_throws_js(TypeError, function() { ctx.bezierCurveTo(0); });
+assert_throws_js(TypeError, function() { ctx.bezierCurveTo(0, 0); });
+assert_throws_js(TypeError, function() { ctx.bezierCurveTo(0, 0, 0); });
+assert_throws_js(TypeError, function() { ctx.bezierCurveTo(0, 0, 0, 0); });
+assert_throws_js(TypeError, function() { ctx.bezierCurveTo(0, 0, 0, 0, 0); });
+assert_throws_js(TypeError, function() { ctx.arcTo(); });
+assert_throws_js(TypeError, function() { ctx.arcTo(0); });
+assert_throws_js(TypeError, function() { ctx.arcTo(0, 0); });
+assert_throws_js(TypeError, function() { ctx.arcTo(0, 0, 0); });
+assert_throws_js(TypeError, function() { ctx.arcTo(0, 0, 0, 0); });
+assert_throws_js(TypeError, function() { ctx.rect(); });
+assert_throws_js(TypeError, function() { ctx.rect(0); });
+assert_throws_js(TypeError, function() { ctx.rect(0, 0); });
+assert_throws_js(TypeError, function() { ctx.rect(0, 0, 0); });
+assert_throws_js(TypeError, function() { ctx.arc(); });
+assert_throws_js(TypeError, function() { ctx.arc(0); });
+assert_throws_js(TypeError, function() { ctx.arc(0, 0); });
+assert_throws_js(TypeError, function() { ctx.arc(0, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.arc(0, 0, 1, 0); });
+// (6th argument to arc is optional)
+if (ctx.isPointInPath) {
+ assert_throws_js(TypeError, function() { ctx.isPointInPath(); });
+ assert_throws_js(TypeError, function() { ctx.isPointInPath(0); });
+}
+if (ctx.drawFocusRing) {
+ assert_throws_js(TypeError, function() { ctx.drawFocusRing(); });
+ assert_throws_js(TypeError, function() { ctx.drawFocusRing(canvas); });
+ assert_throws_js(TypeError, function() { ctx.drawFocusRing(canvas, 0); });
+}
+if (ctx.fillText) {
+ assert_throws_js(TypeError, function() { ctx.fillText(); });
+ assert_throws_js(TypeError, function() { ctx.fillText('test'); });
+ assert_throws_js(TypeError, function() { ctx.fillText('test', 0); });
+ assert_throws_js(TypeError, function() { ctx.strokeText(); });
+ assert_throws_js(TypeError, function() { ctx.strokeText('test'); });
+ assert_throws_js(TypeError, function() { ctx.strokeText('test', 0); });
+ assert_throws_js(TypeError, function() { ctx.measureText(); });
+}
+assert_throws_js(TypeError, function() { ctx.drawImage(); });
+assert_throws_js(TypeError, function() { ctx.drawImage(canvas); });
+assert_throws_js(TypeError, function() { ctx.drawImage(canvas, 0); });
+// TODO: n >= 3 args on drawImage could be either a valid overload,
+// or too few for another overload, or too many for another
+// overload - what should happen?
+if (ctx.createImageData) {
+ assert_throws_js(TypeError, function() { ctx.createImageData(); });
+ assert_throws_js(TypeError, function() { ctx.createImageData(1); });
+}
+if (ctx.getImageData) {
+ assert_throws_js(TypeError, function() { ctx.getImageData(); });
+ assert_throws_js(TypeError, function() { ctx.getImageData(0); });
+ assert_throws_js(TypeError, function() { ctx.getImageData(0, 0); });
+ assert_throws_js(TypeError, function() { ctx.getImageData(0, 0, 1); });
+}
+if (ctx.putImageData) {
+ var imgdata = ctx.getImageData(0, 0, 1, 1);
+ assert_throws_js(TypeError, function() { ctx.putImageData(); });
+ assert_throws_js(TypeError, function() { ctx.putImageData(imgdata); });
+ assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 0); });
+}
+var g = ctx.createLinearGradient(0, 0, 0, 0);
+assert_throws_js(TypeError, function() { g.addColorStop(); });
+assert_throws_js(TypeError, function() { g.addColorStop(0); });
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/META.yml b/testing/web-platform/tests/html/canvas/offscreen/META.yml
new file mode 100644
index 0000000000..d0524194c9
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/META.yml
@@ -0,0 +1,7 @@
+spec: https://html.spec.whatwg.org/multipage/canvas.html#the-offscreencanvas-interface
+suggested_reviewers:
+ - AmeliaBR
+ - annevk
+ - kenrussell
+ - fserb
+ - Cwiiis
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.copy.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.copy.html
new file mode 100644
index 0000000000..a89736b579
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.copy.html
@@ -0,0 +1,47 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.canvas.copy</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.canvas.copy</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+var offscreenCanvas2 = new OffscreenCanvas(canvas.width, canvas.height);
+var ctx2 = offscreenCanvas2.getContext('2d');
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow75.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx2.drawImage(bitmap, 0, 0);
+ ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.globalCompositeOperation = 'copy';
+ ctx.drawImage(offscreenCanvas2, 0, 0);
+ _assertPixelApprox(canvas, 50,25, 255,255,0,191, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.copy.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.copy.worker.js
new file mode 100644
index 0000000000..a8fbc74c1c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.copy.worker.js
@@ -0,0 +1,43 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.canvas.copy
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+var offscreenCanvas2 = new OffscreenCanvas(canvas.width, canvas.height);
+var ctx2 = offscreenCanvas2.getContext('2d');
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow75.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx2.drawImage(bitmap, 0, 0);
+ ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.globalCompositeOperation = 'copy';
+ ctx.drawImage(offscreenCanvas2, 0, 0);
+ _assertPixelApprox(canvas, 50,25, 255,255,0,191, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.destination-atop.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.destination-atop.html
new file mode 100644
index 0000000000..dc53e8b5f0
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.destination-atop.html
@@ -0,0 +1,47 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.canvas.destination-atop</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.canvas.destination-atop</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+var offscreenCanvas2 = new OffscreenCanvas(canvas.width, canvas.height);
+var ctx2 = offscreenCanvas2.getContext('2d');
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow75.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx2.drawImage(bitmap, 0, 0);
+ ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.globalCompositeOperation = 'destination-atop';
+ ctx.drawImage(offscreenCanvas2, 0, 0);
+ _assertPixelApprox(canvas, 50,25, 128,255,128,191, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.destination-atop.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.destination-atop.worker.js
new file mode 100644
index 0000000000..fcb944543c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.destination-atop.worker.js
@@ -0,0 +1,43 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.canvas.destination-atop
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+var offscreenCanvas2 = new OffscreenCanvas(canvas.width, canvas.height);
+var ctx2 = offscreenCanvas2.getContext('2d');
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow75.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx2.drawImage(bitmap, 0, 0);
+ ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.globalCompositeOperation = 'destination-atop';
+ ctx.drawImage(offscreenCanvas2, 0, 0);
+ _assertPixelApprox(canvas, 50,25, 128,255,128,191, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.destination-in.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.destination-in.html
new file mode 100644
index 0000000000..73140e11df
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.destination-in.html
@@ -0,0 +1,47 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.canvas.destination-in</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.canvas.destination-in</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+var offscreenCanvas2 = new OffscreenCanvas(canvas.width, canvas.height);
+var ctx2 = offscreenCanvas2.getContext('2d');
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow75.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx2.drawImage(bitmap, 0, 0);
+ ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.globalCompositeOperation = 'destination-in';
+ ctx.drawImage(offscreenCanvas2, 0, 0);
+ _assertPixelApprox(canvas, 50,25, 0,255,255,96, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.destination-in.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.destination-in.worker.js
new file mode 100644
index 0000000000..e5d7f0b039
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.destination-in.worker.js
@@ -0,0 +1,43 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.canvas.destination-in
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+var offscreenCanvas2 = new OffscreenCanvas(canvas.width, canvas.height);
+var ctx2 = offscreenCanvas2.getContext('2d');
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow75.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx2.drawImage(bitmap, 0, 0);
+ ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.globalCompositeOperation = 'destination-in';
+ ctx.drawImage(offscreenCanvas2, 0, 0);
+ _assertPixelApprox(canvas, 50,25, 0,255,255,96, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.destination-out.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.destination-out.html
new file mode 100644
index 0000000000..5f89aa29f7
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.destination-out.html
@@ -0,0 +1,47 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.canvas.destination-out</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.canvas.destination-out</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+var offscreenCanvas2 = new OffscreenCanvas(canvas.width, canvas.height);
+var ctx2 = offscreenCanvas2.getContext('2d');
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow75.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx2.drawImage(bitmap, 0, 0);
+ ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.globalCompositeOperation = 'destination-out';
+ ctx.drawImage(offscreenCanvas2, 0, 0);
+ _assertPixelApprox(canvas, 50,25, 0,255,255,32, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.destination-out.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.destination-out.worker.js
new file mode 100644
index 0000000000..a4436be0d2
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.destination-out.worker.js
@@ -0,0 +1,43 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.canvas.destination-out
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+var offscreenCanvas2 = new OffscreenCanvas(canvas.width, canvas.height);
+var ctx2 = offscreenCanvas2.getContext('2d');
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow75.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx2.drawImage(bitmap, 0, 0);
+ ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.globalCompositeOperation = 'destination-out';
+ ctx.drawImage(offscreenCanvas2, 0, 0);
+ _assertPixelApprox(canvas, 50,25, 0,255,255,32, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.destination-over.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.destination-over.html
new file mode 100644
index 0000000000..d18f9dc864
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.destination-over.html
@@ -0,0 +1,47 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.canvas.destination-over</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.canvas.destination-over</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+var offscreenCanvas2 = new OffscreenCanvas(canvas.width, canvas.height);
+var ctx2 = offscreenCanvas2.getContext('2d');
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow75.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx2.drawImage(bitmap, 0, 0);
+ ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.globalCompositeOperation = 'destination-over';
+ ctx.drawImage(offscreenCanvas2, 0, 0);
+ _assertPixelApprox(canvas, 50,25, 109,255,146,223, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.destination-over.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.destination-over.worker.js
new file mode 100644
index 0000000000..967e47b34d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.destination-over.worker.js
@@ -0,0 +1,43 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.canvas.destination-over
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+var offscreenCanvas2 = new OffscreenCanvas(canvas.width, canvas.height);
+var ctx2 = offscreenCanvas2.getContext('2d');
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow75.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx2.drawImage(bitmap, 0, 0);
+ ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.globalCompositeOperation = 'destination-over';
+ ctx.drawImage(offscreenCanvas2, 0, 0);
+ _assertPixelApprox(canvas, 50,25, 109,255,146,223, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.lighter.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.lighter.html
new file mode 100644
index 0000000000..9de44add68
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.lighter.html
@@ -0,0 +1,47 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.canvas.lighter</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.canvas.lighter</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+var offscreenCanvas2 = new OffscreenCanvas(canvas.width, canvas.height);
+var ctx2 = offscreenCanvas2.getContext('2d');
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow75.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx2.drawImage(bitmap, 0, 0);
+ ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.globalCompositeOperation = 'lighter';
+ ctx.drawImage(offscreenCanvas2, 0, 0);
+ _assertPixelApprox(canvas, 50,25, 191,255,128,255, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.lighter.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.lighter.worker.js
new file mode 100644
index 0000000000..849d4a6a6f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.lighter.worker.js
@@ -0,0 +1,43 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.canvas.lighter
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+var offscreenCanvas2 = new OffscreenCanvas(canvas.width, canvas.height);
+var ctx2 = offscreenCanvas2.getContext('2d');
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow75.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx2.drawImage(bitmap, 0, 0);
+ ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.globalCompositeOperation = 'lighter';
+ ctx.drawImage(offscreenCanvas2, 0, 0);
+ _assertPixelApprox(canvas, 50,25, 191,255,128,255, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.source-atop.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.source-atop.html
new file mode 100644
index 0000000000..cf9d5cfcbe
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.source-atop.html
@@ -0,0 +1,47 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.canvas.source-atop</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.canvas.source-atop</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+var offscreenCanvas2 = new OffscreenCanvas(canvas.width, canvas.height);
+var ctx2 = offscreenCanvas2.getContext('2d');
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow75.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx2.drawImage(bitmap, 0, 0);
+ ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.globalCompositeOperation = 'source-atop';
+ ctx.drawImage(offscreenCanvas2, 0, 0);
+ _assertPixelApprox(canvas, 50,25, 191,255,64,128, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.source-atop.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.source-atop.worker.js
new file mode 100644
index 0000000000..7601db1f5a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.source-atop.worker.js
@@ -0,0 +1,43 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.canvas.source-atop
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+var offscreenCanvas2 = new OffscreenCanvas(canvas.width, canvas.height);
+var ctx2 = offscreenCanvas2.getContext('2d');
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow75.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx2.drawImage(bitmap, 0, 0);
+ ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.globalCompositeOperation = 'source-atop';
+ ctx.drawImage(offscreenCanvas2, 0, 0);
+ _assertPixelApprox(canvas, 50,25, 191,255,64,128, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.source-in.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.source-in.html
new file mode 100644
index 0000000000..30864d65a3
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.source-in.html
@@ -0,0 +1,47 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.canvas.source-in</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.canvas.source-in</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+var offscreenCanvas2 = new OffscreenCanvas(canvas.width, canvas.height);
+var ctx2 = offscreenCanvas2.getContext('2d');
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow75.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx2.drawImage(bitmap, 0, 0);
+ ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.globalCompositeOperation = 'source-in';
+ ctx.drawImage(offscreenCanvas2, 0, 0);
+ _assertPixelApprox(canvas, 50,25, 255,255,0,96, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.source-in.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.source-in.worker.js
new file mode 100644
index 0000000000..5b21b35564
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.source-in.worker.js
@@ -0,0 +1,43 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.canvas.source-in
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+var offscreenCanvas2 = new OffscreenCanvas(canvas.width, canvas.height);
+var ctx2 = offscreenCanvas2.getContext('2d');
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow75.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx2.drawImage(bitmap, 0, 0);
+ ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.globalCompositeOperation = 'source-in';
+ ctx.drawImage(offscreenCanvas2, 0, 0);
+ _assertPixelApprox(canvas, 50,25, 255,255,0,96, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.source-out.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.source-out.html
new file mode 100644
index 0000000000..d698540260
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.source-out.html
@@ -0,0 +1,47 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.canvas.source-out</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.canvas.source-out</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+var offscreenCanvas2 = new OffscreenCanvas(canvas.width, canvas.height);
+var ctx2 = offscreenCanvas2.getContext('2d');
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow75.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx2.drawImage(bitmap, 0, 0);
+ ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.globalCompositeOperation = 'source-out';
+ ctx.drawImage(offscreenCanvas2, 0, 0);
+ _assertPixelApprox(canvas, 50,25, 255,255,0,96, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.source-out.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.source-out.worker.js
new file mode 100644
index 0000000000..cf5b0a9ac4
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.source-out.worker.js
@@ -0,0 +1,43 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.canvas.source-out
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+var offscreenCanvas2 = new OffscreenCanvas(canvas.width, canvas.height);
+var ctx2 = offscreenCanvas2.getContext('2d');
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow75.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx2.drawImage(bitmap, 0, 0);
+ ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.globalCompositeOperation = 'source-out';
+ ctx.drawImage(offscreenCanvas2, 0, 0);
+ _assertPixelApprox(canvas, 50,25, 255,255,0,96, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.source-over.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.source-over.html
new file mode 100644
index 0000000000..e1e86c7979
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.source-over.html
@@ -0,0 +1,47 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.canvas.source-over</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.canvas.source-over</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+var offscreenCanvas2 = new OffscreenCanvas(canvas.width, canvas.height);
+var ctx2 = offscreenCanvas2.getContext('2d');
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow75.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx2.drawImage(bitmap, 0, 0);
+ ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.globalCompositeOperation = 'source-over';
+ ctx.drawImage(offscreenCanvas2, 0, 0);
+ _assertPixelApprox(canvas, 50,25, 219,255,36,223, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.source-over.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.source-over.worker.js
new file mode 100644
index 0000000000..d61ebd1e56
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.source-over.worker.js
@@ -0,0 +1,43 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.canvas.source-over
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+var offscreenCanvas2 = new OffscreenCanvas(canvas.width, canvas.height);
+var ctx2 = offscreenCanvas2.getContext('2d');
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow75.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx2.drawImage(bitmap, 0, 0);
+ ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.globalCompositeOperation = 'source-over';
+ ctx.drawImage(offscreenCanvas2, 0, 0);
+ _assertPixelApprox(canvas, 50,25, 219,255,36,223, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.xor.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.xor.html
new file mode 100644
index 0000000000..c2d1f52645
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.xor.html
@@ -0,0 +1,47 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.canvas.xor</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.canvas.xor</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+var offscreenCanvas2 = new OffscreenCanvas(canvas.width, canvas.height);
+var ctx2 = offscreenCanvas2.getContext('2d');
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow75.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx2.drawImage(bitmap, 0, 0);
+ ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.globalCompositeOperation = 'xor';
+ ctx.drawImage(offscreenCanvas2, 0, 0);
+ _assertPixelApprox(canvas, 50,25, 191,255,64,128, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.xor.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.xor.worker.js
new file mode 100644
index 0000000000..1b2286a87a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.canvas.xor.worker.js
@@ -0,0 +1,43 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.canvas.xor
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+var offscreenCanvas2 = new OffscreenCanvas(canvas.width, canvas.height);
+var ctx2 = offscreenCanvas2.getContext('2d');
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow75.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx2.drawImage(bitmap, 0, 0);
+ ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.globalCompositeOperation = 'xor';
+ ctx.drawImage(offscreenCanvas2, 0, 0);
+ _assertPixelApprox(canvas, 50,25, 191,255,64,128, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.copy.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.copy.html
new file mode 100644
index 0000000000..5d6afc11cf
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.copy.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.clip.copy</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.clip.copy</h1>
+<p class="desc">fill() does not affect pixels outside the clip region.</p>
+
+
+<script>
+var t = async_test("fill() does not affect pixels outside the clip region.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'copy';
+ctx.rect(-20, -20, 10, 10);
+ctx.clip();
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 50, 50);
+_assertPixel(canvas, 25,25, 0,255,0,255);
+_assertPixel(canvas, 75,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.copy.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.copy.worker.js
new file mode 100644
index 0000000000..3158893fc5
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.copy.worker.js
@@ -0,0 +1,32 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.clip.copy
+// Description:fill() does not affect pixels outside the clip region.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("fill() does not affect pixels outside the clip region.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'copy';
+ctx.rect(-20, -20, 10, 10);
+ctx.clip();
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 50, 50);
+_assertPixel(canvas, 25,25, 0,255,0,255);
+_assertPixel(canvas, 75,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.destination-atop.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.destination-atop.html
new file mode 100644
index 0000000000..93d4d70adb
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.destination-atop.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.clip.destination-atop</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.clip.destination-atop</h1>
+<p class="desc">fill() does not affect pixels outside the clip region.</p>
+
+
+<script>
+var t = async_test("fill() does not affect pixels outside the clip region.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'destination-atop';
+ctx.rect(-20, -20, 10, 10);
+ctx.clip();
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 50, 50);
+_assertPixel(canvas, 25,25, 0,255,0,255);
+_assertPixel(canvas, 75,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.destination-atop.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.destination-atop.worker.js
new file mode 100644
index 0000000000..78b5368194
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.destination-atop.worker.js
@@ -0,0 +1,32 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.clip.destination-atop
+// Description:fill() does not affect pixels outside the clip region.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("fill() does not affect pixels outside the clip region.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'destination-atop';
+ctx.rect(-20, -20, 10, 10);
+ctx.clip();
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 50, 50);
+_assertPixel(canvas, 25,25, 0,255,0,255);
+_assertPixel(canvas, 75,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.destination-in.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.destination-in.html
new file mode 100644
index 0000000000..d2520378e4
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.destination-in.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.clip.destination-in</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.clip.destination-in</h1>
+<p class="desc">fill() does not affect pixels outside the clip region.</p>
+
+
+<script>
+var t = async_test("fill() does not affect pixels outside the clip region.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'destination-in';
+ctx.rect(-20, -20, 10, 10);
+ctx.clip();
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 50, 50);
+_assertPixel(canvas, 25,25, 0,255,0,255);
+_assertPixel(canvas, 75,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.destination-in.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.destination-in.worker.js
new file mode 100644
index 0000000000..bc12026103
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.destination-in.worker.js
@@ -0,0 +1,32 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.clip.destination-in
+// Description:fill() does not affect pixels outside the clip region.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("fill() does not affect pixels outside the clip region.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'destination-in';
+ctx.rect(-20, -20, 10, 10);
+ctx.clip();
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 50, 50);
+_assertPixel(canvas, 25,25, 0,255,0,255);
+_assertPixel(canvas, 75,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.destination-out.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.destination-out.html
new file mode 100644
index 0000000000..fdb1792b53
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.destination-out.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.clip.destination-out</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.clip.destination-out</h1>
+<p class="desc">fill() does not affect pixels outside the clip region.</p>
+
+
+<script>
+var t = async_test("fill() does not affect pixels outside the clip region.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'destination-out';
+ctx.rect(-20, -20, 10, 10);
+ctx.clip();
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 50, 50);
+_assertPixel(canvas, 25,25, 0,255,0,255);
+_assertPixel(canvas, 75,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.destination-out.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.destination-out.worker.js
new file mode 100644
index 0000000000..ebe3a70d03
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.destination-out.worker.js
@@ -0,0 +1,32 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.clip.destination-out
+// Description:fill() does not affect pixels outside the clip region.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("fill() does not affect pixels outside the clip region.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'destination-out';
+ctx.rect(-20, -20, 10, 10);
+ctx.clip();
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 50, 50);
+_assertPixel(canvas, 25,25, 0,255,0,255);
+_assertPixel(canvas, 75,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.destination-over.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.destination-over.html
new file mode 100644
index 0000000000..ae4cb499bc
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.destination-over.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.clip.destination-over</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.clip.destination-over</h1>
+<p class="desc">fill() does not affect pixels outside the clip region.</p>
+
+
+<script>
+var t = async_test("fill() does not affect pixels outside the clip region.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'destination-over';
+ctx.rect(-20, -20, 10, 10);
+ctx.clip();
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 50, 50);
+_assertPixel(canvas, 25,25, 0,255,0,255);
+_assertPixel(canvas, 75,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.destination-over.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.destination-over.worker.js
new file mode 100644
index 0000000000..fb8778f0e1
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.destination-over.worker.js
@@ -0,0 +1,32 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.clip.destination-over
+// Description:fill() does not affect pixels outside the clip region.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("fill() does not affect pixels outside the clip region.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'destination-over';
+ctx.rect(-20, -20, 10, 10);
+ctx.clip();
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 50, 50);
+_assertPixel(canvas, 25,25, 0,255,0,255);
+_assertPixel(canvas, 75,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.lighter.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.lighter.html
new file mode 100644
index 0000000000..1f705f2645
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.lighter.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.clip.lighter</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.clip.lighter</h1>
+<p class="desc">fill() does not affect pixels outside the clip region.</p>
+
+
+<script>
+var t = async_test("fill() does not affect pixels outside the clip region.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'lighter';
+ctx.rect(-20, -20, 10, 10);
+ctx.clip();
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 50, 50);
+_assertPixel(canvas, 25,25, 0,255,0,255);
+_assertPixel(canvas, 75,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.lighter.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.lighter.worker.js
new file mode 100644
index 0000000000..f6bf4c4aff
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.lighter.worker.js
@@ -0,0 +1,32 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.clip.lighter
+// Description:fill() does not affect pixels outside the clip region.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("fill() does not affect pixels outside the clip region.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'lighter';
+ctx.rect(-20, -20, 10, 10);
+ctx.clip();
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 50, 50);
+_assertPixel(canvas, 25,25, 0,255,0,255);
+_assertPixel(canvas, 75,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.source-atop.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.source-atop.html
new file mode 100644
index 0000000000..eb5474702c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.source-atop.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.clip.source-atop</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.clip.source-atop</h1>
+<p class="desc">fill() does not affect pixels outside the clip region.</p>
+
+
+<script>
+var t = async_test("fill() does not affect pixels outside the clip region.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'source-atop';
+ctx.rect(-20, -20, 10, 10);
+ctx.clip();
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 50, 50);
+_assertPixel(canvas, 25,25, 0,255,0,255);
+_assertPixel(canvas, 75,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.source-atop.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.source-atop.worker.js
new file mode 100644
index 0000000000..fec34e1bc6
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.source-atop.worker.js
@@ -0,0 +1,32 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.clip.source-atop
+// Description:fill() does not affect pixels outside the clip region.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("fill() does not affect pixels outside the clip region.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'source-atop';
+ctx.rect(-20, -20, 10, 10);
+ctx.clip();
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 50, 50);
+_assertPixel(canvas, 25,25, 0,255,0,255);
+_assertPixel(canvas, 75,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.source-in.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.source-in.html
new file mode 100644
index 0000000000..cdc814fa75
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.source-in.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.clip.source-in</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.clip.source-in</h1>
+<p class="desc">fill() does not affect pixels outside the clip region.</p>
+
+
+<script>
+var t = async_test("fill() does not affect pixels outside the clip region.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'source-in';
+ctx.rect(-20, -20, 10, 10);
+ctx.clip();
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 50, 50);
+_assertPixel(canvas, 25,25, 0,255,0,255);
+_assertPixel(canvas, 75,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.source-in.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.source-in.worker.js
new file mode 100644
index 0000000000..b9a67cef2e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.source-in.worker.js
@@ -0,0 +1,32 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.clip.source-in
+// Description:fill() does not affect pixels outside the clip region.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("fill() does not affect pixels outside the clip region.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'source-in';
+ctx.rect(-20, -20, 10, 10);
+ctx.clip();
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 50, 50);
+_assertPixel(canvas, 25,25, 0,255,0,255);
+_assertPixel(canvas, 75,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.source-out.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.source-out.html
new file mode 100644
index 0000000000..9df047f77f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.source-out.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.clip.source-out</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.clip.source-out</h1>
+<p class="desc">fill() does not affect pixels outside the clip region.</p>
+
+
+<script>
+var t = async_test("fill() does not affect pixels outside the clip region.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'source-out';
+ctx.rect(-20, -20, 10, 10);
+ctx.clip();
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 50, 50);
+_assertPixel(canvas, 25,25, 0,255,0,255);
+_assertPixel(canvas, 75,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.source-out.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.source-out.worker.js
new file mode 100644
index 0000000000..9d2524064a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.source-out.worker.js
@@ -0,0 +1,32 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.clip.source-out
+// Description:fill() does not affect pixels outside the clip region.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("fill() does not affect pixels outside the clip region.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'source-out';
+ctx.rect(-20, -20, 10, 10);
+ctx.clip();
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 50, 50);
+_assertPixel(canvas, 25,25, 0,255,0,255);
+_assertPixel(canvas, 75,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.source-over.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.source-over.html
new file mode 100644
index 0000000000..522f4f996b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.source-over.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.clip.source-over</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.clip.source-over</h1>
+<p class="desc">fill() does not affect pixels outside the clip region.</p>
+
+
+<script>
+var t = async_test("fill() does not affect pixels outside the clip region.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'source-over';
+ctx.rect(-20, -20, 10, 10);
+ctx.clip();
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 50, 50);
+_assertPixel(canvas, 25,25, 0,255,0,255);
+_assertPixel(canvas, 75,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.source-over.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.source-over.worker.js
new file mode 100644
index 0000000000..6d401c46b0
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.source-over.worker.js
@@ -0,0 +1,32 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.clip.source-over
+// Description:fill() does not affect pixels outside the clip region.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("fill() does not affect pixels outside the clip region.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'source-over';
+ctx.rect(-20, -20, 10, 10);
+ctx.clip();
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 50, 50);
+_assertPixel(canvas, 25,25, 0,255,0,255);
+_assertPixel(canvas, 75,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.xor.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.xor.html
new file mode 100644
index 0000000000..dc1170db37
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.xor.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.clip.xor</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.clip.xor</h1>
+<p class="desc">fill() does not affect pixels outside the clip region.</p>
+
+
+<script>
+var t = async_test("fill() does not affect pixels outside the clip region.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'xor';
+ctx.rect(-20, -20, 10, 10);
+ctx.clip();
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 50, 50);
+_assertPixel(canvas, 25,25, 0,255,0,255);
+_assertPixel(canvas, 75,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.xor.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.xor.worker.js
new file mode 100644
index 0000000000..1d89becc27
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.clip.xor.worker.js
@@ -0,0 +1,32 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.clip.xor
+// Description:fill() does not affect pixels outside the clip region.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("fill() does not affect pixels outside the clip region.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'xor';
+ctx.rect(-20, -20, 10, 10);
+ctx.clip();
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 50, 50);
+_assertPixel(canvas, 25,25, 0,255,0,255);
+_assertPixel(canvas, 75,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.canvas.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.canvas.html
new file mode 100644
index 0000000000..cd05d7b57b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.canvas.html
@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.globalAlpha.canvas</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.globalAlpha.canvas</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+var ctx2 = offscreenCanvas2.getContext('2d');
+ctx2.fillStyle = '#f00';
+ctx2.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalAlpha = 0.01; // avoid any potential alpha=0 optimisations
+ctx.drawImage(offscreenCanvas2, 0, 0);
+_assertPixelApprox(canvas, 50,25, 2,253,0,255, 2);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.canvas.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.canvas.worker.js
new file mode 100644
index 0000000000..fe644f2ca3
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.canvas.worker.js
@@ -0,0 +1,31 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.globalAlpha.canvas
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+var ctx2 = offscreenCanvas2.getContext('2d');
+ctx2.fillStyle = '#f00';
+ctx2.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalAlpha = 0.01; // avoid any potential alpha=0 optimisations
+ctx.drawImage(offscreenCanvas2, 0, 0);
+_assertPixelApprox(canvas, 50,25, 2,253,0,255, 2);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.canvascopy.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.canvascopy.html
new file mode 100644
index 0000000000..52a431cfaa
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.canvascopy.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.globalAlpha.canvascopy</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.globalAlpha.canvascopy</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+var ctx2 = offscreenCanvas2.getContext('2d');
+ctx2.fillStyle = '#0f0';
+ctx2.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'copy'
+ctx.globalAlpha = 0.51;
+ctx.drawImage(offscreenCanvas2, 0, 0);
+_assertPixelApprox(canvas, 50,25, 0,255,0,130, 2);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.canvascopy.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.canvascopy.worker.js
new file mode 100644
index 0000000000..e0ef84a78b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.canvascopy.worker.js
@@ -0,0 +1,32 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.globalAlpha.canvascopy
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+var ctx2 = offscreenCanvas2.getContext('2d');
+ctx2.fillStyle = '#0f0';
+ctx2.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'copy'
+ctx.globalAlpha = 0.51;
+ctx.drawImage(offscreenCanvas2, 0, 0);
+_assertPixelApprox(canvas, 50,25, 0,255,0,130, 2);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.canvaspattern.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.canvaspattern.html
new file mode 100644
index 0000000000..24d7a0fc3c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.canvaspattern.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.globalAlpha.canvaspattern</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.globalAlpha.canvaspattern</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+var ctx2 = offscreenCanvas2.getContext('2d');
+ctx2.fillStyle = '#f00';
+ctx2.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = ctx.createPattern(offscreenCanvas2, 'no-repeat');
+ctx.globalAlpha = 0.01; // avoid any potential alpha=0 optimisations
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 50,25, 2,253,0,255, 2);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.canvaspattern.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.canvaspattern.worker.js
new file mode 100644
index 0000000000..2fb494d054
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.canvaspattern.worker.js
@@ -0,0 +1,32 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.globalAlpha.canvaspattern
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+var ctx2 = offscreenCanvas2.getContext('2d');
+ctx2.fillStyle = '#f00';
+ctx2.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = ctx.createPattern(offscreenCanvas2, 'no-repeat');
+ctx.globalAlpha = 0.01; // avoid any potential alpha=0 optimisations
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 50,25, 2,253,0,255, 2);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.default.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.default.html
new file mode 100644
index 0000000000..6604d5647d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.default.html
@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.globalAlpha.default</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.globalAlpha.default</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertSame(ctx.globalAlpha, 1.0, "ctx.globalAlpha", "1.0");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.default.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.default.worker.js
new file mode 100644
index 0000000000..921c401551
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.default.worker.js
@@ -0,0 +1,23 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.globalAlpha.default
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertSame(ctx.globalAlpha, 1.0, "ctx.globalAlpha", "1.0");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.fill.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.fill.html
new file mode 100644
index 0000000000..e349b92376
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.fill.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.globalAlpha.fill</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.globalAlpha.fill</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalAlpha = 0.01; // avoid any potential alpha=0 optimisations
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 50,25, 2,253,0,255, 2);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.fill.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.fill.worker.js
new file mode 100644
index 0000000000..f354773bf4
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.fill.worker.js
@@ -0,0 +1,28 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.globalAlpha.fill
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalAlpha = 0.01; // avoid any potential alpha=0 optimisations
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 50,25, 2,253,0,255, 2);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.image.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.image.html
new file mode 100644
index 0000000000..29a963a7c6
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.image.html
@@ -0,0 +1,43 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.globalAlpha.image</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.globalAlpha.image</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalAlpha = 0.01; // avoid any potential alpha=0 optimisations
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/red.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 0, 0);
+ _assertPixelApprox(canvas, 50,25, 2,253,0,255, 2);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.image.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.image.worker.js
new file mode 100644
index 0000000000..010fbd8bfa
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.image.worker.js
@@ -0,0 +1,39 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.globalAlpha.image
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalAlpha = 0.01; // avoid any potential alpha=0 optimisations
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/red.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 0, 0);
+ _assertPixelApprox(canvas, 50,25, 2,253,0,255, 2);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.imagepattern.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.imagepattern.html
new file mode 100644
index 0000000000..7eacf16c4f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.imagepattern.html
@@ -0,0 +1,44 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.globalAlpha.imagepattern</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.globalAlpha.imagepattern</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/red.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.fillStyle = ctx.createPattern(bitmap, 'no-repeat');
+ ctx.globalAlpha = 0.01; // avoid any potential alpha=0 optimisations
+ ctx.fillRect(0, 0, 100, 50);
+ _assertPixelApprox(canvas, 50,25, 2,253,0,255, 2);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.imagepattern.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.imagepattern.worker.js
new file mode 100644
index 0000000000..5607972635
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.imagepattern.worker.js
@@ -0,0 +1,40 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.globalAlpha.imagepattern
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/red.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.fillStyle = ctx.createPattern(bitmap, 'no-repeat');
+ ctx.globalAlpha = 0.01; // avoid any potential alpha=0 optimisations
+ ctx.fillRect(0, 0, 100, 50);
+ _assertPixelApprox(canvas, 50,25, 2,253,0,255, 2);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.invalid.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.invalid.html
new file mode 100644
index 0000000000..d00951e46e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.invalid.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.globalAlpha.invalid</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.globalAlpha.invalid</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.globalAlpha = 0.5;
+var a = ctx.globalAlpha; // might not be exactly 0.5, if it is rounded/quantised, so remember for future comparisons
+ctx.globalAlpha = Infinity;
+_assertSame(ctx.globalAlpha, a, "ctx.globalAlpha", "a");
+ctx.globalAlpha = -Infinity;
+_assertSame(ctx.globalAlpha, a, "ctx.globalAlpha", "a");
+ctx.globalAlpha = NaN;
+_assertSame(ctx.globalAlpha, a, "ctx.globalAlpha", "a");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.invalid.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.invalid.worker.js
new file mode 100644
index 0000000000..88f017dec7
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.invalid.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.globalAlpha.invalid
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.globalAlpha = 0.5;
+var a = ctx.globalAlpha; // might not be exactly 0.5, if it is rounded/quantised, so remember for future comparisons
+ctx.globalAlpha = Infinity;
+_assertSame(ctx.globalAlpha, a, "ctx.globalAlpha", "a");
+ctx.globalAlpha = -Infinity;
+_assertSame(ctx.globalAlpha, a, "ctx.globalAlpha", "a");
+ctx.globalAlpha = NaN;
+_assertSame(ctx.globalAlpha, a, "ctx.globalAlpha", "a");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.range.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.range.html
new file mode 100644
index 0000000000..29efb63aad
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.range.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.globalAlpha.range</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.globalAlpha.range</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.globalAlpha = 0.5;
+var a = ctx.globalAlpha; // might not be exactly 0.5, if it is rounded/quantised, so remember for future comparisons
+ctx.globalAlpha = 1.1;
+_assertSame(ctx.globalAlpha, a, "ctx.globalAlpha", "a");
+ctx.globalAlpha = -0.1;
+_assertSame(ctx.globalAlpha, a, "ctx.globalAlpha", "a");
+ctx.globalAlpha = 0;
+_assertSame(ctx.globalAlpha, 0, "ctx.globalAlpha", "0");
+ctx.globalAlpha = 1;
+_assertSame(ctx.globalAlpha, 1, "ctx.globalAlpha", "1");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.range.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.range.worker.js
new file mode 100644
index 0000000000..cfd0836665
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.range.worker.js
@@ -0,0 +1,32 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.globalAlpha.range
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.globalAlpha = 0.5;
+var a = ctx.globalAlpha; // might not be exactly 0.5, if it is rounded/quantised, so remember for future comparisons
+ctx.globalAlpha = 1.1;
+_assertSame(ctx.globalAlpha, a, "ctx.globalAlpha", "a");
+ctx.globalAlpha = -0.1;
+_assertSame(ctx.globalAlpha, a, "ctx.globalAlpha", "a");
+ctx.globalAlpha = 0;
+_assertSame(ctx.globalAlpha, 0, "ctx.globalAlpha", "0");
+ctx.globalAlpha = 1;
+_assertSame(ctx.globalAlpha, 1, "ctx.globalAlpha", "1");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.copy.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.copy.html
new file mode 100644
index 0000000000..1aa9c98e9d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.copy.html
@@ -0,0 +1,44 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.image.copy</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.image.copy</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'copy';
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow75.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 0, 0);
+ _assertPixelApprox(canvas, 50,25, 255,255,0,191, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.copy.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.copy.worker.js
new file mode 100644
index 0000000000..ba3399a2b1
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.copy.worker.js
@@ -0,0 +1,40 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.image.copy
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'copy';
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow75.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 0, 0);
+ _assertPixelApprox(canvas, 50,25, 255,255,0,191, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.destination-atop.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.destination-atop.html
new file mode 100644
index 0000000000..76547a1f86
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.destination-atop.html
@@ -0,0 +1,44 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.image.destination-atop</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.image.destination-atop</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'destination-atop';
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow75.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 0, 0);
+ _assertPixelApprox(canvas, 50,25, 128,255,128,191, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.destination-atop.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.destination-atop.worker.js
new file mode 100644
index 0000000000..677b882b01
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.destination-atop.worker.js
@@ -0,0 +1,40 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.image.destination-atop
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'destination-atop';
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow75.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 0, 0);
+ _assertPixelApprox(canvas, 50,25, 128,255,128,191, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.destination-in.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.destination-in.html
new file mode 100644
index 0000000000..8fa5786961
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.destination-in.html
@@ -0,0 +1,44 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.image.destination-in</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.image.destination-in</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'destination-in';
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow75.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 0, 0);
+ _assertPixelApprox(canvas, 50,25, 0,255,255,96, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.destination-in.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.destination-in.worker.js
new file mode 100644
index 0000000000..aa8c1ac06d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.destination-in.worker.js
@@ -0,0 +1,40 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.image.destination-in
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'destination-in';
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow75.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 0, 0);
+ _assertPixelApprox(canvas, 50,25, 0,255,255,96, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.destination-out.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.destination-out.html
new file mode 100644
index 0000000000..3a4da68c2c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.destination-out.html
@@ -0,0 +1,44 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.image.destination-out</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.image.destination-out</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'destination-out';
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow75.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 0, 0);
+ _assertPixelApprox(canvas, 50,25, 0,255,255,32, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.destination-out.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.destination-out.worker.js
new file mode 100644
index 0000000000..94ac27a00d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.destination-out.worker.js
@@ -0,0 +1,40 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.image.destination-out
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'destination-out';
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow75.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 0, 0);
+ _assertPixelApprox(canvas, 50,25, 0,255,255,32, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.destination-over.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.destination-over.html
new file mode 100644
index 0000000000..c6da28db6a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.destination-over.html
@@ -0,0 +1,44 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.image.destination-over</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.image.destination-over</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'destination-over';
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow75.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 0, 0);
+ _assertPixelApprox(canvas, 50,25, 109,255,146,223, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.destination-over.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.destination-over.worker.js
new file mode 100644
index 0000000000..3bc357dce8
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.destination-over.worker.js
@@ -0,0 +1,40 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.image.destination-over
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'destination-over';
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow75.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 0, 0);
+ _assertPixelApprox(canvas, 50,25, 109,255,146,223, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.lighter.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.lighter.html
new file mode 100644
index 0000000000..db89e5a3e8
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.lighter.html
@@ -0,0 +1,44 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.image.lighter</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.image.lighter</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'lighter';
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow75.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 0, 0);
+ _assertPixelApprox(canvas, 50,25, 191,255,128,255, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.lighter.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.lighter.worker.js
new file mode 100644
index 0000000000..922b5f4635
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.lighter.worker.js
@@ -0,0 +1,40 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.image.lighter
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'lighter';
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow75.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 0, 0);
+ _assertPixelApprox(canvas, 50,25, 191,255,128,255, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.source-atop.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.source-atop.html
new file mode 100644
index 0000000000..44dd6f4274
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.source-atop.html
@@ -0,0 +1,44 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.image.source-atop</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.image.source-atop</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'source-atop';
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow75.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 0, 0);
+ _assertPixelApprox(canvas, 50,25, 191,255,64,128, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.source-atop.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.source-atop.worker.js
new file mode 100644
index 0000000000..1b32993858
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.source-atop.worker.js
@@ -0,0 +1,40 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.image.source-atop
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'source-atop';
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow75.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 0, 0);
+ _assertPixelApprox(canvas, 50,25, 191,255,64,128, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.source-in.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.source-in.html
new file mode 100644
index 0000000000..64c28c0c21
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.source-in.html
@@ -0,0 +1,44 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.image.source-in</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.image.source-in</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'source-in';
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow75.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 0, 0);
+ _assertPixelApprox(canvas, 50,25, 255,255,0,96, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.source-in.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.source-in.worker.js
new file mode 100644
index 0000000000..3048f849a9
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.source-in.worker.js
@@ -0,0 +1,40 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.image.source-in
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'source-in';
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow75.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 0, 0);
+ _assertPixelApprox(canvas, 50,25, 255,255,0,96, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.source-out.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.source-out.html
new file mode 100644
index 0000000000..46d3e483ee
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.source-out.html
@@ -0,0 +1,44 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.image.source-out</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.image.source-out</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'source-out';
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow75.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 0, 0);
+ _assertPixelApprox(canvas, 50,25, 255,255,0,96, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.source-out.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.source-out.worker.js
new file mode 100644
index 0000000000..090bbe7d22
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.source-out.worker.js
@@ -0,0 +1,40 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.image.source-out
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'source-out';
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow75.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 0, 0);
+ _assertPixelApprox(canvas, 50,25, 255,255,0,96, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.source-over.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.source-over.html
new file mode 100644
index 0000000000..1d13b77248
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.source-over.html
@@ -0,0 +1,44 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.image.source-over</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.image.source-over</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'source-over';
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow75.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 0, 0);
+ _assertPixelApprox(canvas, 50,25, 219,255,36,223, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.source-over.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.source-over.worker.js
new file mode 100644
index 0000000000..7937e5be69
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.source-over.worker.js
@@ -0,0 +1,40 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.image.source-over
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'source-over';
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow75.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 0, 0);
+ _assertPixelApprox(canvas, 50,25, 219,255,36,223, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.xor.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.xor.html
new file mode 100644
index 0000000000..73253fabca
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.xor.html
@@ -0,0 +1,44 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.image.xor</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.image.xor</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'xor';
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow75.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 0, 0);
+ _assertPixelApprox(canvas, 50,25, 191,255,64,128, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.xor.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.xor.worker.js
new file mode 100644
index 0000000000..7a22f7d39f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.image.xor.worker.js
@@ -0,0 +1,40 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.image.xor
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'xor';
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow75.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 0, 0);
+ _assertPixelApprox(canvas, 50,25, 191,255,64,128, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.operation.casesensitive.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.operation.casesensitive.html
new file mode 100644
index 0000000000..a317e7cf60
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.operation.casesensitive.html
@@ -0,0 +1,29 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.operation.casesensitive</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.operation.casesensitive</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.globalCompositeOperation = 'xor';
+ctx.globalCompositeOperation = 'Source-over';
+_assertSame(ctx.globalCompositeOperation, 'xor', "ctx.globalCompositeOperation", "'xor'");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.operation.casesensitive.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.operation.casesensitive.worker.js
new file mode 100644
index 0000000000..b6f7adacb9
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.operation.casesensitive.worker.js
@@ -0,0 +1,25 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.operation.casesensitive
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.globalCompositeOperation = 'xor';
+ctx.globalCompositeOperation = 'Source-over';
+_assertSame(ctx.globalCompositeOperation, 'xor', "ctx.globalCompositeOperation", "'xor'");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.operation.clear.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.operation.clear.html
new file mode 100644
index 0000000000..c838cf3f83
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.operation.clear.html
@@ -0,0 +1,29 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.operation.clear</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.operation.clear</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.globalCompositeOperation = 'xor';
+ctx.globalCompositeOperation = 'clear';
+_assertSame(ctx.globalCompositeOperation, 'clear', "ctx.globalCompositeOperation", "'clear'");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.operation.clear.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.operation.clear.worker.js
new file mode 100644
index 0000000000..e911da2023
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.operation.clear.worker.js
@@ -0,0 +1,25 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.operation.clear
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.globalCompositeOperation = 'xor';
+ctx.globalCompositeOperation = 'clear';
+_assertSame(ctx.globalCompositeOperation, 'clear', "ctx.globalCompositeOperation", "'clear'");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.operation.darker.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.operation.darker.html
new file mode 100644
index 0000000000..1439cbbf41
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.operation.darker.html
@@ -0,0 +1,29 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.operation.darker</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.operation.darker</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.globalCompositeOperation = 'xor';
+ctx.globalCompositeOperation = 'darker';
+_assertSame(ctx.globalCompositeOperation, 'xor', "ctx.globalCompositeOperation", "'xor'");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.operation.darker.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.operation.darker.worker.js
new file mode 100644
index 0000000000..c90d4828e4
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.operation.darker.worker.js
@@ -0,0 +1,25 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.operation.darker
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.globalCompositeOperation = 'xor';
+ctx.globalCompositeOperation = 'darker';
+_assertSame(ctx.globalCompositeOperation, 'xor', "ctx.globalCompositeOperation", "'xor'");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.operation.default.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.operation.default.html
new file mode 100644
index 0000000000..f6a9d162ca
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.operation.default.html
@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.operation.default</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.operation.default</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertSame(ctx.globalCompositeOperation, 'source-over', "ctx.globalCompositeOperation", "'source-over'");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.operation.default.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.operation.default.worker.js
new file mode 100644
index 0000000000..691c153ea7
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.operation.default.worker.js
@@ -0,0 +1,23 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.operation.default
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertSame(ctx.globalCompositeOperation, 'source-over', "ctx.globalCompositeOperation", "'source-over'");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.operation.get.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.operation.get.html
new file mode 100644
index 0000000000..0b3226c279
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.operation.get.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.operation.get</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.operation.get</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var modes = ['source-atop', 'source-in', 'source-out', 'source-over',
+ 'destination-atop', 'destination-in', 'destination-out', 'destination-over',
+ 'lighter', 'copy', 'xor'];
+for (var i = 0; i < modes.length; ++i)
+{
+ ctx.globalCompositeOperation = modes[i];
+ _assertSame(ctx.globalCompositeOperation, modes[i], "ctx.globalCompositeOperation", "modes[\""+(i)+"\"]");
+}
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.operation.get.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.operation.get.worker.js
new file mode 100644
index 0000000000..9009536ef7
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.operation.get.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.operation.get
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var modes = ['source-atop', 'source-in', 'source-out', 'source-over',
+ 'destination-atop', 'destination-in', 'destination-out', 'destination-over',
+ 'lighter', 'copy', 'xor'];
+for (var i = 0; i < modes.length; ++i)
+{
+ ctx.globalCompositeOperation = modes[i];
+ _assertSame(ctx.globalCompositeOperation, modes[i], "ctx.globalCompositeOperation", "modes[\""+(i)+"\"]");
+}
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.operation.highlight.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.operation.highlight.html
new file mode 100644
index 0000000000..bffe7b4edb
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.operation.highlight.html
@@ -0,0 +1,29 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.operation.highlight</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.operation.highlight</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.globalCompositeOperation = 'xor';
+ctx.globalCompositeOperation = 'highlight';
+_assertSame(ctx.globalCompositeOperation, 'xor', "ctx.globalCompositeOperation", "'xor'");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.operation.highlight.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.operation.highlight.worker.js
new file mode 100644
index 0000000000..234893aac7
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.operation.highlight.worker.js
@@ -0,0 +1,25 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.operation.highlight
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.globalCompositeOperation = 'xor';
+ctx.globalCompositeOperation = 'highlight';
+_assertSame(ctx.globalCompositeOperation, 'xor', "ctx.globalCompositeOperation", "'xor'");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.operation.nullsuffix.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.operation.nullsuffix.html
new file mode 100644
index 0000000000..72e83fcf80
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.operation.nullsuffix.html
@@ -0,0 +1,29 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.operation.nullsuffix</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.operation.nullsuffix</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.globalCompositeOperation = 'xor';
+ctx.globalCompositeOperation = 'source-over\0';
+_assertSame(ctx.globalCompositeOperation, 'xor', "ctx.globalCompositeOperation", "'xor'");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.operation.nullsuffix.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.operation.nullsuffix.worker.js
new file mode 100644
index 0000000000..ee3266e18a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.operation.nullsuffix.worker.js
@@ -0,0 +1,25 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.operation.nullsuffix
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.globalCompositeOperation = 'xor';
+ctx.globalCompositeOperation = 'source-over\0';
+_assertSame(ctx.globalCompositeOperation, 'xor', "ctx.globalCompositeOperation", "'xor'");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.operation.over.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.operation.over.html
new file mode 100644
index 0000000000..0400d974c4
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.operation.over.html
@@ -0,0 +1,29 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.operation.over</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.operation.over</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.globalCompositeOperation = 'xor';
+ctx.globalCompositeOperation = 'over';
+_assertSame(ctx.globalCompositeOperation, 'xor', "ctx.globalCompositeOperation", "'xor'");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.operation.over.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.operation.over.worker.js
new file mode 100644
index 0000000000..97a4209c83
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.operation.over.worker.js
@@ -0,0 +1,25 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.operation.over
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.globalCompositeOperation = 'xor';
+ctx.globalCompositeOperation = 'over';
+_assertSame(ctx.globalCompositeOperation, 'xor', "ctx.globalCompositeOperation", "'xor'");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.operation.unrecognised.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.operation.unrecognised.html
new file mode 100644
index 0000000000..1bcc764721
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.operation.unrecognised.html
@@ -0,0 +1,29 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.operation.unrecognised</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.operation.unrecognised</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.globalCompositeOperation = 'xor';
+ctx.globalCompositeOperation = 'nonexistent';
+_assertSame(ctx.globalCompositeOperation, 'xor', "ctx.globalCompositeOperation", "'xor'");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.operation.unrecognised.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.operation.unrecognised.worker.js
new file mode 100644
index 0000000000..d02e9f1aa7
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.operation.unrecognised.worker.js
@@ -0,0 +1,25 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.operation.unrecognised
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.globalCompositeOperation = 'xor';
+ctx.globalCompositeOperation = 'nonexistent';
+_assertSame(ctx.globalCompositeOperation, 'xor', "ctx.globalCompositeOperation", "'xor'");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.copy.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.copy.html
new file mode 100644
index 0000000000..aaad0b418f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.copy.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.solid.copy</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.solid.copy</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 1.0)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'copy';
+ctx.fillStyle = 'rgba(255, 255, 0, 1.0)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 50,25, 255,255,0,255, 5);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.copy.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.copy.worker.js
new file mode 100644
index 0000000000..63cc6c1e90
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.copy.worker.js
@@ -0,0 +1,29 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.solid.copy
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 1.0)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'copy';
+ctx.fillStyle = 'rgba(255, 255, 0, 1.0)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 50,25, 255,255,0,255, 5);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.destination-atop.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.destination-atop.html
new file mode 100644
index 0000000000..be4cf393a1
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.destination-atop.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.solid.destination-atop</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.solid.destination-atop</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 1.0)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'destination-atop';
+ctx.fillStyle = 'rgba(255, 255, 0, 1.0)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 50,25, 0,255,255,255, 5);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.destination-atop.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.destination-atop.worker.js
new file mode 100644
index 0000000000..a09827ca88
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.destination-atop.worker.js
@@ -0,0 +1,29 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.solid.destination-atop
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 1.0)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'destination-atop';
+ctx.fillStyle = 'rgba(255, 255, 0, 1.0)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 50,25, 0,255,255,255, 5);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.destination-in.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.destination-in.html
new file mode 100644
index 0000000000..e5ea33b5b0
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.destination-in.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.solid.destination-in</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.solid.destination-in</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 1.0)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'destination-in';
+ctx.fillStyle = 'rgba(255, 255, 0, 1.0)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 50,25, 0,255,255,255, 5);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.destination-in.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.destination-in.worker.js
new file mode 100644
index 0000000000..b06ad63266
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.destination-in.worker.js
@@ -0,0 +1,29 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.solid.destination-in
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 1.0)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'destination-in';
+ctx.fillStyle = 'rgba(255, 255, 0, 1.0)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 50,25, 0,255,255,255, 5);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.destination-out.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.destination-out.html
new file mode 100644
index 0000000000..49efe240d0
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.destination-out.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.solid.destination-out</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.solid.destination-out</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 1.0)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'destination-out';
+ctx.fillStyle = 'rgba(255, 255, 0, 1.0)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 50,25, 0,0,0,0, 5);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.destination-out.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.destination-out.worker.js
new file mode 100644
index 0000000000..3b0232e255
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.destination-out.worker.js
@@ -0,0 +1,29 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.solid.destination-out
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 1.0)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'destination-out';
+ctx.fillStyle = 'rgba(255, 255, 0, 1.0)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 50,25, 0,0,0,0, 5);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.destination-over.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.destination-over.html
new file mode 100644
index 0000000000..c1d7965cad
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.destination-over.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.solid.destination-over</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.solid.destination-over</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 1.0)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'destination-over';
+ctx.fillStyle = 'rgba(255, 255, 0, 1.0)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 50,25, 0,255,255,255, 5);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.destination-over.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.destination-over.worker.js
new file mode 100644
index 0000000000..99d64be578
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.destination-over.worker.js
@@ -0,0 +1,29 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.solid.destination-over
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 1.0)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'destination-over';
+ctx.fillStyle = 'rgba(255, 255, 0, 1.0)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 50,25, 0,255,255,255, 5);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.lighter.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.lighter.html
new file mode 100644
index 0000000000..2877e14ad9
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.lighter.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.solid.lighter</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.solid.lighter</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 1.0)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'lighter';
+ctx.fillStyle = 'rgba(255, 255, 0, 1.0)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 50,25, 255,255,255,255, 5);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.lighter.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.lighter.worker.js
new file mode 100644
index 0000000000..011a19934e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.lighter.worker.js
@@ -0,0 +1,29 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.solid.lighter
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 1.0)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'lighter';
+ctx.fillStyle = 'rgba(255, 255, 0, 1.0)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 50,25, 255,255,255,255, 5);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.source-atop.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.source-atop.html
new file mode 100644
index 0000000000..9f972edabc
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.source-atop.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.solid.source-atop</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.solid.source-atop</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 1.0)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'source-atop';
+ctx.fillStyle = 'rgba(255, 255, 0, 1.0)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 50,25, 255,255,0,255, 5);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.source-atop.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.source-atop.worker.js
new file mode 100644
index 0000000000..2dc6ec9b2e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.source-atop.worker.js
@@ -0,0 +1,29 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.solid.source-atop
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 1.0)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'source-atop';
+ctx.fillStyle = 'rgba(255, 255, 0, 1.0)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 50,25, 255,255,0,255, 5);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.source-in.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.source-in.html
new file mode 100644
index 0000000000..c674bbde91
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.source-in.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.solid.source-in</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.solid.source-in</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 1.0)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'source-in';
+ctx.fillStyle = 'rgba(255, 255, 0, 1.0)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 50,25, 255,255,0,255, 5);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.source-in.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.source-in.worker.js
new file mode 100644
index 0000000000..5b833ec156
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.source-in.worker.js
@@ -0,0 +1,29 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.solid.source-in
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 1.0)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'source-in';
+ctx.fillStyle = 'rgba(255, 255, 0, 1.0)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 50,25, 255,255,0,255, 5);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.source-out.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.source-out.html
new file mode 100644
index 0000000000..0fa403bb75
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.source-out.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.solid.source-out</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.solid.source-out</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 1.0)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'source-out';
+ctx.fillStyle = 'rgba(255, 255, 0, 1.0)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 50,25, 0,0,0,0, 5);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.source-out.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.source-out.worker.js
new file mode 100644
index 0000000000..0486939935
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.source-out.worker.js
@@ -0,0 +1,29 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.solid.source-out
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 1.0)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'source-out';
+ctx.fillStyle = 'rgba(255, 255, 0, 1.0)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 50,25, 0,0,0,0, 5);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.source-over.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.source-over.html
new file mode 100644
index 0000000000..4392e60c9e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.source-over.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.solid.source-over</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.solid.source-over</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 1.0)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'source-over';
+ctx.fillStyle = 'rgba(255, 255, 0, 1.0)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 50,25, 255,255,0,255, 5);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.source-over.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.source-over.worker.js
new file mode 100644
index 0000000000..ce8190ec0f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.source-over.worker.js
@@ -0,0 +1,29 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.solid.source-over
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 1.0)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'source-over';
+ctx.fillStyle = 'rgba(255, 255, 0, 1.0)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 50,25, 255,255,0,255, 5);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.xor.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.xor.html
new file mode 100644
index 0000000000..a9eb83e6a9
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.xor.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.solid.xor</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.solid.xor</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 1.0)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'xor';
+ctx.fillStyle = 'rgba(255, 255, 0, 1.0)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 50,25, 0,0,0,0, 5);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.xor.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.xor.worker.js
new file mode 100644
index 0000000000..8b7edec945
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.solid.xor.worker.js
@@ -0,0 +1,29 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.solid.xor
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 1.0)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'xor';
+ctx.fillStyle = 'rgba(255, 255, 0, 1.0)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 50,25, 0,0,0,0, 5);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.copy.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.copy.html
new file mode 100644
index 0000000000..20c107bd77
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.copy.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.transparent.copy</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.transparent.copy</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 0, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'copy';
+ctx.fillStyle = 'rgba(0, 0, 255, 0.75)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 50,25, 0,0,255,191, 5);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.copy.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.copy.worker.js
new file mode 100644
index 0000000000..7fb646acd5
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.copy.worker.js
@@ -0,0 +1,29 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.transparent.copy
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 0, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'copy';
+ctx.fillStyle = 'rgba(0, 0, 255, 0.75)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 50,25, 0,0,255,191, 5);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.destination-atop.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.destination-atop.html
new file mode 100644
index 0000000000..2bc5466d27
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.destination-atop.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.transparent.destination-atop</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.transparent.destination-atop</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 0, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'destination-atop';
+ctx.fillStyle = 'rgba(0, 0, 255, 0.75)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 50,25, 0,128,128,191, 5);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.destination-atop.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.destination-atop.worker.js
new file mode 100644
index 0000000000..f433bedf7c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.destination-atop.worker.js
@@ -0,0 +1,29 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.transparent.destination-atop
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 0, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'destination-atop';
+ctx.fillStyle = 'rgba(0, 0, 255, 0.75)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 50,25, 0,128,128,191, 5);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.destination-in.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.destination-in.html
new file mode 100644
index 0000000000..1d1121812d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.destination-in.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.transparent.destination-in</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.transparent.destination-in</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 0, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'destination-in';
+ctx.fillStyle = 'rgba(0, 0, 255, 0.75)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 50,25, 0,255,0,96, 5);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.destination-in.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.destination-in.worker.js
new file mode 100644
index 0000000000..a4c159aeef
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.destination-in.worker.js
@@ -0,0 +1,29 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.transparent.destination-in
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 0, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'destination-in';
+ctx.fillStyle = 'rgba(0, 0, 255, 0.75)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 50,25, 0,255,0,96, 5);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.destination-out.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.destination-out.html
new file mode 100644
index 0000000000..17b3fecd02
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.destination-out.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.transparent.destination-out</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.transparent.destination-out</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 0, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'destination-out';
+ctx.fillStyle = 'rgba(0, 0, 255, 0.75)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 50,25, 0,255,0,32, 5);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.destination-out.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.destination-out.worker.js
new file mode 100644
index 0000000000..cf6827fc51
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.destination-out.worker.js
@@ -0,0 +1,29 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.transparent.destination-out
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 0, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'destination-out';
+ctx.fillStyle = 'rgba(0, 0, 255, 0.75)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 50,25, 0,255,0,32, 5);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.destination-over.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.destination-over.html
new file mode 100644
index 0000000000..04c267a817
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.destination-over.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.transparent.destination-over</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.transparent.destination-over</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 0, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'destination-over';
+ctx.fillStyle = 'rgba(0, 0, 255, 0.75)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 50,25, 0,146,109,223, 5);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.destination-over.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.destination-over.worker.js
new file mode 100644
index 0000000000..98a4b5b59e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.destination-over.worker.js
@@ -0,0 +1,29 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.transparent.destination-over
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 0, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'destination-over';
+ctx.fillStyle = 'rgba(0, 0, 255, 0.75)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 50,25, 0,146,109,223, 5);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.lighter.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.lighter.html
new file mode 100644
index 0000000000..86d06f2485
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.lighter.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.transparent.lighter</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.transparent.lighter</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 0, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'lighter';
+ctx.fillStyle = 'rgba(0, 0, 255, 0.75)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 50,25, 0,128,191,255, 5);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.lighter.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.lighter.worker.js
new file mode 100644
index 0000000000..f9b419ace7
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.lighter.worker.js
@@ -0,0 +1,29 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.transparent.lighter
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 0, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'lighter';
+ctx.fillStyle = 'rgba(0, 0, 255, 0.75)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 50,25, 0,128,191,255, 5);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.source-atop.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.source-atop.html
new file mode 100644
index 0000000000..f4e79c0c24
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.source-atop.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.transparent.source-atop</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.transparent.source-atop</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 0, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'source-atop';
+ctx.fillStyle = 'rgba(0, 0, 255, 0.75)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 50,25, 0,64,191,128, 5);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.source-atop.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.source-atop.worker.js
new file mode 100644
index 0000000000..db65db8366
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.source-atop.worker.js
@@ -0,0 +1,29 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.transparent.source-atop
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 0, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'source-atop';
+ctx.fillStyle = 'rgba(0, 0, 255, 0.75)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 50,25, 0,64,191,128, 5);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.source-in.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.source-in.html
new file mode 100644
index 0000000000..56b4e7704d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.source-in.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.transparent.source-in</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.transparent.source-in</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 0, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'source-in';
+ctx.fillStyle = 'rgba(0, 0, 255, 0.75)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 50,25, 0,0,255,96, 5);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.source-in.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.source-in.worker.js
new file mode 100644
index 0000000000..32765c4c03
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.source-in.worker.js
@@ -0,0 +1,29 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.transparent.source-in
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 0, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'source-in';
+ctx.fillStyle = 'rgba(0, 0, 255, 0.75)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 50,25, 0,0,255,96, 5);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.source-out.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.source-out.html
new file mode 100644
index 0000000000..cca28c5ebc
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.source-out.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.transparent.source-out</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.transparent.source-out</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 0, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'source-out';
+ctx.fillStyle = 'rgba(0, 0, 255, 0.75)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 50,25, 0,0,255,96, 5);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.source-out.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.source-out.worker.js
new file mode 100644
index 0000000000..3cf507bf84
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.source-out.worker.js
@@ -0,0 +1,29 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.transparent.source-out
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 0, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'source-out';
+ctx.fillStyle = 'rgba(0, 0, 255, 0.75)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 50,25, 0,0,255,96, 5);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.source-over.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.source-over.html
new file mode 100644
index 0000000000..a8ae30131d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.source-over.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.transparent.source-over</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.transparent.source-over</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 0, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'source-over';
+ctx.fillStyle = 'rgba(0, 0, 255, 0.75)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 50,25, 0,36,219,223, 5);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.source-over.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.source-over.worker.js
new file mode 100644
index 0000000000..35545c04d4
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.source-over.worker.js
@@ -0,0 +1,29 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.transparent.source-over
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 0, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'source-over';
+ctx.fillStyle = 'rgba(0, 0, 255, 0.75)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 50,25, 0,36,219,223, 5);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.xor.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.xor.html
new file mode 100644
index 0000000000..638bae02ec
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.xor.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.transparent.xor</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.transparent.xor</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 0, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'xor';
+ctx.fillStyle = 'rgba(0, 0, 255, 0.75)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 50,25, 0,64,191,128, 5);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.xor.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.xor.worker.js
new file mode 100644
index 0000000000..b21d30d900
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.transparent.xor.worker.js
@@ -0,0 +1,29 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.transparent.xor
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 0, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'xor';
+ctx.fillStyle = 'rgba(0, 0, 255, 0.75)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 50,25, 0,64,191,128, 5);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.fill.copy.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.fill.copy.html
new file mode 100644
index 0000000000..f10275f407
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.fill.copy.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.uncovered.fill.copy</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.uncovered.fill.copy</h1>
+<p class="desc">fill() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.</p>
+
+
+<script>
+var t = async_test("fill() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 0, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'copy';
+ctx.fillStyle = 'rgba(0, 0, 255, 0.75)';
+ctx.translate(0, 25);
+ctx.fillRect(0, 50, 100, 50);
+_assertPixelApprox(canvas, 50,25, 0,0,0,0, 5);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.fill.copy.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.fill.copy.worker.js
new file mode 100644
index 0000000000..3b86c720f5
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.fill.copy.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.uncovered.fill.copy
+// Description:fill() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("fill() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 0, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'copy';
+ctx.fillStyle = 'rgba(0, 0, 255, 0.75)';
+ctx.translate(0, 25);
+ctx.fillRect(0, 50, 100, 50);
+_assertPixelApprox(canvas, 50,25, 0,0,0,0, 5);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.fill.destination-atop.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.fill.destination-atop.html
new file mode 100644
index 0000000000..8672e9e19f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.fill.destination-atop.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.uncovered.fill.destination-atop</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.uncovered.fill.destination-atop</h1>
+<p class="desc">fill() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.</p>
+
+
+<script>
+var t = async_test("fill() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 0, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'destination-atop';
+ctx.fillStyle = 'rgba(0, 0, 255, 0.75)';
+ctx.translate(0, 25);
+ctx.fillRect(0, 50, 100, 50);
+_assertPixelApprox(canvas, 50,25, 0,0,0,0, 5);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.fill.destination-atop.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.fill.destination-atop.worker.js
new file mode 100644
index 0000000000..69610fc107
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.fill.destination-atop.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.uncovered.fill.destination-atop
+// Description:fill() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("fill() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 0, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'destination-atop';
+ctx.fillStyle = 'rgba(0, 0, 255, 0.75)';
+ctx.translate(0, 25);
+ctx.fillRect(0, 50, 100, 50);
+_assertPixelApprox(canvas, 50,25, 0,0,0,0, 5);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.fill.destination-in.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.fill.destination-in.html
new file mode 100644
index 0000000000..0f069372ad
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.fill.destination-in.html
@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.uncovered.fill.destination-in</title>
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.uncovered.fill.destination-in</h1>
+<p class="desc">fill() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.</p>
+
+
+<script>
+var t = async_test("fill() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 0, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'destination-in';
+ctx.fillStyle = 'rgba(0, 0, 255, 0.75)';
+ctx.translate(0, 25);
+ctx.fillRect(0, 50, 100, 50);
+_assertPixelApprox(canvas, 50,25, 0,0,0,0, 5);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.fill.destination-in.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.fill.destination-in.worker.js
new file mode 100644
index 0000000000..26b287134b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.fill.destination-in.worker.js
@@ -0,0 +1,31 @@
+// META: timeout=long
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.uncovered.fill.destination-in
+// Description:fill() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("fill() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 0, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'destination-in';
+ctx.fillStyle = 'rgba(0, 0, 255, 0.75)';
+ctx.translate(0, 25);
+ctx.fillRect(0, 50, 100, 50);
+_assertPixelApprox(canvas, 50,25, 0,0,0,0, 5);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.fill.source-in.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.fill.source-in.html
new file mode 100644
index 0000000000..6e1ecdd719
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.fill.source-in.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.uncovered.fill.source-in</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.uncovered.fill.source-in</h1>
+<p class="desc">fill() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.</p>
+
+
+<script>
+var t = async_test("fill() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 0, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'source-in';
+ctx.fillStyle = 'rgba(0, 0, 255, 0.75)';
+ctx.translate(0, 25);
+ctx.fillRect(0, 50, 100, 50);
+_assertPixelApprox(canvas, 50,25, 0,0,0,0, 5);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.fill.source-in.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.fill.source-in.worker.js
new file mode 100644
index 0000000000..6da98654cf
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.fill.source-in.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.uncovered.fill.source-in
+// Description:fill() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("fill() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 0, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'source-in';
+ctx.fillStyle = 'rgba(0, 0, 255, 0.75)';
+ctx.translate(0, 25);
+ctx.fillRect(0, 50, 100, 50);
+_assertPixelApprox(canvas, 50,25, 0,0,0,0, 5);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.fill.source-out.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.fill.source-out.html
new file mode 100644
index 0000000000..de16897f8c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.fill.source-out.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.uncovered.fill.source-out</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.uncovered.fill.source-out</h1>
+<p class="desc">fill() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.</p>
+
+
+<script>
+var t = async_test("fill() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 0, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'source-out';
+ctx.fillStyle = 'rgba(0, 0, 255, 0.75)';
+ctx.translate(0, 25);
+ctx.fillRect(0, 50, 100, 50);
+_assertPixelApprox(canvas, 50,25, 0,0,0,0, 5);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.fill.source-out.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.fill.source-out.worker.js
new file mode 100644
index 0000000000..515b587b58
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.fill.source-out.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.uncovered.fill.source-out
+// Description:fill() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("fill() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 0, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'source-out';
+ctx.fillStyle = 'rgba(0, 0, 255, 0.75)';
+ctx.translate(0, 25);
+ctx.fillRect(0, 50, 100, 50);
+_assertPixelApprox(canvas, 50,25, 0,0,0,0, 5);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.image.copy.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.image.copy.html
new file mode 100644
index 0000000000..5f3c9a1914
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.image.copy.html
@@ -0,0 +1,45 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.uncovered.image.copy</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.uncovered.image.copy</h1>
+<p class="desc">drawImage() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.</p>
+
+
+<script>
+var t = async_test("drawImage() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'copy';
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 40, 40, 10, 10, 40, 50, 10, 10);
+ _assertPixelApprox(canvas, 15,15, 0,0,0,0, 5);
+ _assertPixelApprox(canvas, 50,25, 0,0,0,0, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.image.copy.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.image.copy.worker.js
new file mode 100644
index 0000000000..2faecdf0dd
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.image.copy.worker.js
@@ -0,0 +1,41 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.uncovered.image.copy
+// Description:drawImage() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("drawImage() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'copy';
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 40, 40, 10, 10, 40, 50, 10, 10);
+ _assertPixelApprox(canvas, 15,15, 0,0,0,0, 5);
+ _assertPixelApprox(canvas, 50,25, 0,0,0,0, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.image.destination-atop.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.image.destination-atop.html
new file mode 100644
index 0000000000..3605e44698
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.image.destination-atop.html
@@ -0,0 +1,45 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.uncovered.image.destination-atop</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.uncovered.image.destination-atop</h1>
+<p class="desc">drawImage() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.</p>
+
+
+<script>
+var t = async_test("drawImage() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'destination-atop';
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 40, 40, 10, 10, 40, 50, 10, 10);
+ _assertPixelApprox(canvas, 15,15, 0,0,0,0, 5);
+ _assertPixelApprox(canvas, 50,25, 0,0,0,0, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.image.destination-atop.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.image.destination-atop.worker.js
new file mode 100644
index 0000000000..8b361e066d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.image.destination-atop.worker.js
@@ -0,0 +1,41 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.uncovered.image.destination-atop
+// Description:drawImage() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("drawImage() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'destination-atop';
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 40, 40, 10, 10, 40, 50, 10, 10);
+ _assertPixelApprox(canvas, 15,15, 0,0,0,0, 5);
+ _assertPixelApprox(canvas, 50,25, 0,0,0,0, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.image.destination-in.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.image.destination-in.html
new file mode 100644
index 0000000000..c48ee8e16e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.image.destination-in.html
@@ -0,0 +1,45 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.uncovered.image.destination-in</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.uncovered.image.destination-in</h1>
+<p class="desc">drawImage() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.</p>
+
+
+<script>
+var t = async_test("drawImage() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'destination-in';
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 40, 40, 10, 10, 40, 50, 10, 10);
+ _assertPixelApprox(canvas, 15,15, 0,0,0,0, 5);
+ _assertPixelApprox(canvas, 50,25, 0,0,0,0, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.image.destination-in.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.image.destination-in.worker.js
new file mode 100644
index 0000000000..b270efc7aa
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.image.destination-in.worker.js
@@ -0,0 +1,41 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.uncovered.image.destination-in
+// Description:drawImage() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("drawImage() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'destination-in';
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 40, 40, 10, 10, 40, 50, 10, 10);
+ _assertPixelApprox(canvas, 15,15, 0,0,0,0, 5);
+ _assertPixelApprox(canvas, 50,25, 0,0,0,0, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.image.source-in.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.image.source-in.html
new file mode 100644
index 0000000000..af4c3b7daa
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.image.source-in.html
@@ -0,0 +1,45 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.uncovered.image.source-in</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.uncovered.image.source-in</h1>
+<p class="desc">drawImage() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.</p>
+
+
+<script>
+var t = async_test("drawImage() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'source-in';
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 40, 40, 10, 10, 40, 50, 10, 10);
+ _assertPixelApprox(canvas, 15,15, 0,0,0,0, 5);
+ _assertPixelApprox(canvas, 50,25, 0,0,0,0, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.image.source-in.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.image.source-in.worker.js
new file mode 100644
index 0000000000..5fe00cf14b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.image.source-in.worker.js
@@ -0,0 +1,41 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.uncovered.image.source-in
+// Description:drawImage() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("drawImage() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'source-in';
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 40, 40, 10, 10, 40, 50, 10, 10);
+ _assertPixelApprox(canvas, 15,15, 0,0,0,0, 5);
+ _assertPixelApprox(canvas, 50,25, 0,0,0,0, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.image.source-out.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.image.source-out.html
new file mode 100644
index 0000000000..4f1c3869b0
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.image.source-out.html
@@ -0,0 +1,45 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.uncovered.image.source-out</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.uncovered.image.source-out</h1>
+<p class="desc">drawImage() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.</p>
+
+
+<script>
+var t = async_test("drawImage() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'source-out';
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 40, 40, 10, 10, 40, 50, 10, 10);
+ _assertPixelApprox(canvas, 15,15, 0,0,0,0, 5);
+ _assertPixelApprox(canvas, 50,25, 0,0,0,0, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.image.source-out.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.image.source-out.worker.js
new file mode 100644
index 0000000000..f93185bc66
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.image.source-out.worker.js
@@ -0,0 +1,41 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.uncovered.image.source-out
+// Description:drawImage() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("drawImage() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'source-out';
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 40, 40, 10, 10, 40, 50, 10, 10);
+ _assertPixelApprox(canvas, 15,15, 0,0,0,0, 5);
+ _assertPixelApprox(canvas, 50,25, 0,0,0,0, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.nocontext.copy.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.nocontext.copy.html
new file mode 100644
index 0000000000..57c499d81c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.nocontext.copy.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.uncovered.nocontext.copy</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.uncovered.nocontext.copy</h1>
+<p class="desc">drawImage() of a canvas with no context draws pixels as (0,0,0,0), and does not leave the pixels unchanged.</p>
+
+
+<script>
+var t = async_test("drawImage() of a canvas with no context draws pixels as (0,0,0,0), and does not leave the pixels unchanged.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'copy';
+var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+ctx.drawImage(offscreenCanvas2, 0, 0);
+_assertPixelApprox(canvas, 50,25, 0,0,0,0, 5);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.nocontext.copy.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.nocontext.copy.worker.js
new file mode 100644
index 0000000000..bf6bdfe943
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.nocontext.copy.worker.js
@@ -0,0 +1,29 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.uncovered.nocontext.copy
+// Description:drawImage() of a canvas with no context draws pixels as (0,0,0,0), and does not leave the pixels unchanged.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("drawImage() of a canvas with no context draws pixels as (0,0,0,0), and does not leave the pixels unchanged.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'copy';
+var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+ctx.drawImage(offscreenCanvas2, 0, 0);
+_assertPixelApprox(canvas, 50,25, 0,0,0,0, 5);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.nocontext.destination-atop.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.nocontext.destination-atop.html
new file mode 100644
index 0000000000..73684800ca
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.nocontext.destination-atop.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.uncovered.nocontext.destination-atop</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.uncovered.nocontext.destination-atop</h1>
+<p class="desc">drawImage() of a canvas with no context draws pixels as (0,0,0,0), and does not leave the pixels unchanged.</p>
+
+
+<script>
+var t = async_test("drawImage() of a canvas with no context draws pixels as (0,0,0,0), and does not leave the pixels unchanged.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'destination-atop';
+var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+ctx.drawImage(offscreenCanvas2, 0, 0);
+_assertPixelApprox(canvas, 50,25, 0,0,0,0, 5);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.nocontext.destination-atop.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.nocontext.destination-atop.worker.js
new file mode 100644
index 0000000000..3574add7d8
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.nocontext.destination-atop.worker.js
@@ -0,0 +1,29 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.uncovered.nocontext.destination-atop
+// Description:drawImage() of a canvas with no context draws pixels as (0,0,0,0), and does not leave the pixels unchanged.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("drawImage() of a canvas with no context draws pixels as (0,0,0,0), and does not leave the pixels unchanged.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'destination-atop';
+var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+ctx.drawImage(offscreenCanvas2, 0, 0);
+_assertPixelApprox(canvas, 50,25, 0,0,0,0, 5);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.nocontext.destination-in.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.nocontext.destination-in.html
new file mode 100644
index 0000000000..b41c4b749c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.nocontext.destination-in.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.uncovered.nocontext.destination-in</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.uncovered.nocontext.destination-in</h1>
+<p class="desc">drawImage() of a canvas with no context draws pixels as (0,0,0,0), and does not leave the pixels unchanged.</p>
+
+
+<script>
+var t = async_test("drawImage() of a canvas with no context draws pixels as (0,0,0,0), and does not leave the pixels unchanged.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'destination-in';
+var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+ctx.drawImage(offscreenCanvas2, 0, 0);
+_assertPixelApprox(canvas, 50,25, 0,0,0,0, 5);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.nocontext.destination-in.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.nocontext.destination-in.worker.js
new file mode 100644
index 0000000000..979a0849e8
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.nocontext.destination-in.worker.js
@@ -0,0 +1,29 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.uncovered.nocontext.destination-in
+// Description:drawImage() of a canvas with no context draws pixels as (0,0,0,0), and does not leave the pixels unchanged.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("drawImage() of a canvas with no context draws pixels as (0,0,0,0), and does not leave the pixels unchanged.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'destination-in';
+var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+ctx.drawImage(offscreenCanvas2, 0, 0);
+_assertPixelApprox(canvas, 50,25, 0,0,0,0, 5);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.nocontext.source-in.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.nocontext.source-in.html
new file mode 100644
index 0000000000..99aeefbb6a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.nocontext.source-in.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.uncovered.nocontext.source-in</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.uncovered.nocontext.source-in</h1>
+<p class="desc">drawImage() of a canvas with no context draws pixels as (0,0,0,0), and does not leave the pixels unchanged.</p>
+
+
+<script>
+var t = async_test("drawImage() of a canvas with no context draws pixels as (0,0,0,0), and does not leave the pixels unchanged.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'source-in';
+var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+ctx.drawImage(offscreenCanvas2, 0, 0);
+_assertPixelApprox(canvas, 50,25, 0,0,0,0, 5);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.nocontext.source-in.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.nocontext.source-in.worker.js
new file mode 100644
index 0000000000..55596f859d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.nocontext.source-in.worker.js
@@ -0,0 +1,29 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.uncovered.nocontext.source-in
+// Description:drawImage() of a canvas with no context draws pixels as (0,0,0,0), and does not leave the pixels unchanged.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("drawImage() of a canvas with no context draws pixels as (0,0,0,0), and does not leave the pixels unchanged.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'source-in';
+var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+ctx.drawImage(offscreenCanvas2, 0, 0);
+_assertPixelApprox(canvas, 50,25, 0,0,0,0, 5);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.nocontext.source-out.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.nocontext.source-out.html
new file mode 100644
index 0000000000..0dfd4ae0d0
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.nocontext.source-out.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.uncovered.nocontext.source-out</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.uncovered.nocontext.source-out</h1>
+<p class="desc">drawImage() of a canvas with no context draws pixels as (0,0,0,0), and does not leave the pixels unchanged.</p>
+
+
+<script>
+var t = async_test("drawImage() of a canvas with no context draws pixels as (0,0,0,0), and does not leave the pixels unchanged.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'source-out';
+var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+ctx.drawImage(offscreenCanvas2, 0, 0);
+_assertPixelApprox(canvas, 50,25, 0,0,0,0, 5);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.nocontext.source-out.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.nocontext.source-out.worker.js
new file mode 100644
index 0000000000..f0820e03fe
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.nocontext.source-out.worker.js
@@ -0,0 +1,29 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.uncovered.nocontext.source-out
+// Description:drawImage() of a canvas with no context draws pixels as (0,0,0,0), and does not leave the pixels unchanged.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("drawImage() of a canvas with no context draws pixels as (0,0,0,0), and does not leave the pixels unchanged.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'source-out';
+var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+ctx.drawImage(offscreenCanvas2, 0, 0);
+_assertPixelApprox(canvas, 50,25, 0,0,0,0, 5);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.pattern.copy.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.pattern.copy.html
new file mode 100644
index 0000000000..244cc82f55
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.pattern.copy.html
@@ -0,0 +1,45 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.uncovered.pattern.copy</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.uncovered.pattern.copy</h1>
+<p class="desc">Pattern fill() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.</p>
+
+
+<script>
+var t = async_test("Pattern fill() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'copy';
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.fillStyle = ctx.createPattern(bitmap, 'no-repeat');
+ ctx.fillRect(0, 50, 100, 50);
+ _assertPixelApprox(canvas, 50,25, 0,0,0,0, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.pattern.copy.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.pattern.copy.worker.js
new file mode 100644
index 0000000000..3aeddac219
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.pattern.copy.worker.js
@@ -0,0 +1,41 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.uncovered.pattern.copy
+// Description:Pattern fill() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Pattern fill() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'copy';
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.fillStyle = ctx.createPattern(bitmap, 'no-repeat');
+ ctx.fillRect(0, 50, 100, 50);
+ _assertPixelApprox(canvas, 50,25, 0,0,0,0, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.pattern.destination-atop.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.pattern.destination-atop.html
new file mode 100644
index 0000000000..3624f1baa9
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.pattern.destination-atop.html
@@ -0,0 +1,45 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.uncovered.pattern.destination-atop</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.uncovered.pattern.destination-atop</h1>
+<p class="desc">Pattern fill() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.</p>
+
+
+<script>
+var t = async_test("Pattern fill() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'destination-atop';
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.fillStyle = ctx.createPattern(bitmap, 'no-repeat');
+ ctx.fillRect(0, 50, 100, 50);
+ _assertPixelApprox(canvas, 50,25, 0,0,0,0, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.pattern.destination-atop.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.pattern.destination-atop.worker.js
new file mode 100644
index 0000000000..86aaf9fb52
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.pattern.destination-atop.worker.js
@@ -0,0 +1,41 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.uncovered.pattern.destination-atop
+// Description:Pattern fill() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Pattern fill() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'destination-atop';
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.fillStyle = ctx.createPattern(bitmap, 'no-repeat');
+ ctx.fillRect(0, 50, 100, 50);
+ _assertPixelApprox(canvas, 50,25, 0,0,0,0, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.pattern.destination-in.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.pattern.destination-in.html
new file mode 100644
index 0000000000..21990f1ae0
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.pattern.destination-in.html
@@ -0,0 +1,45 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.uncovered.pattern.destination-in</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.uncovered.pattern.destination-in</h1>
+<p class="desc">Pattern fill() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.</p>
+
+
+<script>
+var t = async_test("Pattern fill() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'destination-in';
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.fillStyle = ctx.createPattern(bitmap, 'no-repeat');
+ ctx.fillRect(0, 50, 100, 50);
+ _assertPixelApprox(canvas, 50,25, 0,0,0,0, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.pattern.destination-in.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.pattern.destination-in.worker.js
new file mode 100644
index 0000000000..184efcd71e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.pattern.destination-in.worker.js
@@ -0,0 +1,41 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.uncovered.pattern.destination-in
+// Description:Pattern fill() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Pattern fill() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'destination-in';
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.fillStyle = ctx.createPattern(bitmap, 'no-repeat');
+ ctx.fillRect(0, 50, 100, 50);
+ _assertPixelApprox(canvas, 50,25, 0,0,0,0, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.pattern.source-in.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.pattern.source-in.html
new file mode 100644
index 0000000000..f95da543c9
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.pattern.source-in.html
@@ -0,0 +1,45 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.uncovered.pattern.source-in</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.uncovered.pattern.source-in</h1>
+<p class="desc">Pattern fill() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.</p>
+
+
+<script>
+var t = async_test("Pattern fill() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'source-in';
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.fillStyle = ctx.createPattern(bitmap, 'no-repeat');
+ ctx.fillRect(0, 50, 100, 50);
+ _assertPixelApprox(canvas, 50,25, 0,0,0,0, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.pattern.source-in.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.pattern.source-in.worker.js
new file mode 100644
index 0000000000..61c798b7aa
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.pattern.source-in.worker.js
@@ -0,0 +1,41 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.uncovered.pattern.source-in
+// Description:Pattern fill() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Pattern fill() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'source-in';
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.fillStyle = ctx.createPattern(bitmap, 'no-repeat');
+ ctx.fillRect(0, 50, 100, 50);
+ _assertPixelApprox(canvas, 50,25, 0,0,0,0, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.pattern.source-out.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.pattern.source-out.html
new file mode 100644
index 0000000000..4eb6ba519f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.pattern.source-out.html
@@ -0,0 +1,45 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.composite.uncovered.pattern.source-out</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.composite.uncovered.pattern.source-out</h1>
+<p class="desc">Pattern fill() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.</p>
+
+
+<script>
+var t = async_test("Pattern fill() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'source-out';
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.fillStyle = ctx.createPattern(bitmap, 'no-repeat');
+ ctx.fillRect(0, 50, 100, 50);
+ _assertPixelApprox(canvas, 50,25, 0,0,0,0, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.pattern.source-out.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.pattern.source-out.worker.js
new file mode 100644
index 0000000000..5827c7a1d7
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.uncovered.pattern.source-out.worker.js
@@ -0,0 +1,41 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.uncovered.pattern.source-out
+// Description:Pattern fill() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Pattern fill() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'source-out';
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/yellow.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.fillStyle = ctx.createPattern(bitmap, 'no-repeat');
+ ctx.fillRect(0, 50, 100, 50);
+ _assertPixelApprox(canvas, 50,25, 0,0,0,0, 5);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/conformance-requirements/2d.conformance.requirements.basics.html b/testing/web-platform/tests/html/canvas/offscreen/conformance-requirements/2d.conformance.requirements.basics.html
new file mode 100644
index 0000000000..a89ec10f9b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/conformance-requirements/2d.conformance.requirements.basics.html
@@ -0,0 +1,62 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.conformance.requirements.basics</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.conformance.requirements.basics</h1>
+<p class="desc">void methods return undefined</p>
+
+<p class="notes">Defined in "Web IDL" (draft)
+<script>
+var t = async_test("void methods return undefined");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertSame(ctx.save(), undefined, "ctx.save()", "undefined");
+_assertSame(ctx.restore(), undefined, "ctx.restore()", "undefined");
+_assertSame(ctx.scale(1, 1), undefined, "ctx.scale(1, 1)", "undefined");
+_assertSame(ctx.rotate(0), undefined, "ctx.rotate(0)", "undefined");
+_assertSame(ctx.translate(0, 0), undefined, "ctx.translate(0, 0)", "undefined");
+if (ctx.transform) { // (avoid spurious failures, since the aim here is not to test that all features are supported)
+ _assertSame(ctx.transform(1, 0, 0, 1, 0, 0), undefined, "ctx.transform(1, 0, 0, 1, 0, 0)", "undefined");
+}
+if (ctx.setTransform) {
+ _assertSame(ctx.setTransform(1, 0, 0, 1, 0, 0), undefined, "ctx.setTransform(1, 0, 0, 1, 0, 0)", "undefined");
+ _assertSame(ctx.setTransform(), undefined, "ctx.setTransform()", "undefined");
+}
+_assertSame(ctx.clearRect(0, 0, 0, 0), undefined, "ctx.clearRect(0, 0, 0, 0)", "undefined");
+_assertSame(ctx.fillRect(0, 0, 0, 0), undefined, "ctx.fillRect(0, 0, 0, 0)", "undefined");
+_assertSame(ctx.strokeRect(0, 0, 0, 0), undefined, "ctx.strokeRect(0, 0, 0, 0)", "undefined");
+_assertSame(ctx.beginPath(), undefined, "ctx.beginPath()", "undefined");
+_assertSame(ctx.closePath(), undefined, "ctx.closePath()", "undefined");
+_assertSame(ctx.moveTo(0, 0), undefined, "ctx.moveTo(0, 0)", "undefined");
+_assertSame(ctx.lineTo(0, 0), undefined, "ctx.lineTo(0, 0)", "undefined");
+_assertSame(ctx.quadraticCurveTo(0, 0, 0, 0), undefined, "ctx.quadraticCurveTo(0, 0, 0, 0)", "undefined");
+_assertSame(ctx.bezierCurveTo(0, 0, 0, 0, 0, 0), undefined, "ctx.bezierCurveTo(0, 0, 0, 0, 0, 0)", "undefined");
+_assertSame(ctx.arcTo(0, 0, 0, 0, 1), undefined, "ctx.arcTo(0, 0, 0, 0, 1)", "undefined");
+_assertSame(ctx.rect(0, 0, 0, 0), undefined, "ctx.rect(0, 0, 0, 0)", "undefined");
+_assertSame(ctx.arc(0, 0, 1, 0, 0, true), undefined, "ctx.arc(0, 0, 1, 0, 0, true)", "undefined");
+_assertSame(ctx.fill(), undefined, "ctx.fill()", "undefined");
+_assertSame(ctx.stroke(), undefined, "ctx.stroke()", "undefined");
+_assertSame(ctx.clip(), undefined, "ctx.clip()", "undefined");
+if (ctx.fillText) {
+ _assertSame(ctx.fillText('test', 0, 0), undefined, "ctx.fillText('test', 0, 0)", "undefined");
+ _assertSame(ctx.strokeText('test', 0, 0), undefined, "ctx.strokeText('test', 0, 0)", "undefined");
+}
+if (ctx.putImageData) {
+ _assertSame(ctx.putImageData(ctx.getImageData(0, 0, 1, 1), 0, 0), undefined, "ctx.putImageData(ctx.getImageData(0, 0, 1, 1), 0, 0)", "undefined");
+}
+_assertSame(ctx.drawImage(canvas, 0, 0, 1, 1, 0, 0, 0, 0), undefined, "ctx.drawImage(canvas, 0, 0, 1, 1, 0, 0, 0, 0)", "undefined");
+_assertSame(ctx.createLinearGradient(0, 0, 0, 0).addColorStop(0, 'white'), undefined, "ctx.createLinearGradient(0, 0, 0, 0).addColorStop(0, 'white')", "undefined");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/conformance-requirements/2d.conformance.requirements.basics.worker.js b/testing/web-platform/tests/html/canvas/offscreen/conformance-requirements/2d.conformance.requirements.basics.worker.js
new file mode 100644
index 0000000000..8d6ddc894f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/conformance-requirements/2d.conformance.requirements.basics.worker.js
@@ -0,0 +1,58 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.conformance.requirements.basics
+// Description:void methods return undefined
+// Note:<p class="notes">Defined in "Web IDL" (draft)
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("void methods return undefined");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertSame(ctx.save(), undefined, "ctx.save()", "undefined");
+_assertSame(ctx.restore(), undefined, "ctx.restore()", "undefined");
+_assertSame(ctx.scale(1, 1), undefined, "ctx.scale(1, 1)", "undefined");
+_assertSame(ctx.rotate(0), undefined, "ctx.rotate(0)", "undefined");
+_assertSame(ctx.translate(0, 0), undefined, "ctx.translate(0, 0)", "undefined");
+if (ctx.transform) { // (avoid spurious failures, since the aim here is not to test that all features are supported)
+ _assertSame(ctx.transform(1, 0, 0, 1, 0, 0), undefined, "ctx.transform(1, 0, 0, 1, 0, 0)", "undefined");
+}
+if (ctx.setTransform) {
+ _assertSame(ctx.setTransform(1, 0, 0, 1, 0, 0), undefined, "ctx.setTransform(1, 0, 0, 1, 0, 0)", "undefined");
+ _assertSame(ctx.setTransform(), undefined, "ctx.setTransform()", "undefined");
+}
+_assertSame(ctx.clearRect(0, 0, 0, 0), undefined, "ctx.clearRect(0, 0, 0, 0)", "undefined");
+_assertSame(ctx.fillRect(0, 0, 0, 0), undefined, "ctx.fillRect(0, 0, 0, 0)", "undefined");
+_assertSame(ctx.strokeRect(0, 0, 0, 0), undefined, "ctx.strokeRect(0, 0, 0, 0)", "undefined");
+_assertSame(ctx.beginPath(), undefined, "ctx.beginPath()", "undefined");
+_assertSame(ctx.closePath(), undefined, "ctx.closePath()", "undefined");
+_assertSame(ctx.moveTo(0, 0), undefined, "ctx.moveTo(0, 0)", "undefined");
+_assertSame(ctx.lineTo(0, 0), undefined, "ctx.lineTo(0, 0)", "undefined");
+_assertSame(ctx.quadraticCurveTo(0, 0, 0, 0), undefined, "ctx.quadraticCurveTo(0, 0, 0, 0)", "undefined");
+_assertSame(ctx.bezierCurveTo(0, 0, 0, 0, 0, 0), undefined, "ctx.bezierCurveTo(0, 0, 0, 0, 0, 0)", "undefined");
+_assertSame(ctx.arcTo(0, 0, 0, 0, 1), undefined, "ctx.arcTo(0, 0, 0, 0, 1)", "undefined");
+_assertSame(ctx.rect(0, 0, 0, 0), undefined, "ctx.rect(0, 0, 0, 0)", "undefined");
+_assertSame(ctx.arc(0, 0, 1, 0, 0, true), undefined, "ctx.arc(0, 0, 1, 0, 0, true)", "undefined");
+_assertSame(ctx.fill(), undefined, "ctx.fill()", "undefined");
+_assertSame(ctx.stroke(), undefined, "ctx.stroke()", "undefined");
+_assertSame(ctx.clip(), undefined, "ctx.clip()", "undefined");
+if (ctx.fillText) {
+ _assertSame(ctx.fillText('test', 0, 0), undefined, "ctx.fillText('test', 0, 0)", "undefined");
+ _assertSame(ctx.strokeText('test', 0, 0), undefined, "ctx.strokeText('test', 0, 0)", "undefined");
+}
+if (ctx.putImageData) {
+ _assertSame(ctx.putImageData(ctx.getImageData(0, 0, 1, 1), 0, 0), undefined, "ctx.putImageData(ctx.getImageData(0, 0, 1, 1), 0, 0)", "undefined");
+}
+_assertSame(ctx.drawImage(canvas, 0, 0, 1, 1, 0, 0, 0, 0), undefined, "ctx.drawImage(canvas, 0, 0, 1, 1, 0, 0, 0, 0)", "undefined");
+_assertSame(ctx.createLinearGradient(0, 0, 0, 0).addColorStop(0, 'white'), undefined, "ctx.createLinearGradient(0, 0, 0, 0).addColorStop(0, 'white')", "undefined");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/conformance-requirements/2d.conformance.requirements.missingargs.html b/testing/web-platform/tests/html/canvas/offscreen/conformance-requirements/2d.conformance.requirements.missingargs.html
new file mode 100644
index 0000000000..cfbbca9e5e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/conformance-requirements/2d.conformance.requirements.missingargs.html
@@ -0,0 +1,141 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.conformance.requirements.missingargs</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.conformance.requirements.missingargs</h1>
+<p class="desc">Missing arguments cause TypeError</p>
+
+
+<script>
+var t = async_test("Missing arguments cause TypeError");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_js(TypeError, function() { ctx.scale(); });
+assert_throws_js(TypeError, function() { ctx.scale(1); });
+assert_throws_js(TypeError, function() { ctx.rotate(); });
+assert_throws_js(TypeError, function() { ctx.translate(); });
+assert_throws_js(TypeError, function() { ctx.translate(0); });
+if (ctx.transform) { // (avoid spurious failures, since the aim here is not to test that all features are supported)
+ assert_throws_js(TypeError, function() { ctx.transform(); });
+ assert_throws_js(TypeError, function() { ctx.transform(1); });
+ assert_throws_js(TypeError, function() { ctx.transform(1, 0); });
+ assert_throws_js(TypeError, function() { ctx.transform(1, 0, 0); });
+ assert_throws_js(TypeError, function() { ctx.transform(1, 0, 0, 1); });
+ assert_throws_js(TypeError, function() { ctx.transform(1, 0, 0, 1, 0); });
+}
+if (ctx.setTransform) {
+ assert_throws_js(TypeError, function() { ctx.setTransform(1); });
+ assert_throws_js(TypeError, function() { ctx.setTransform(1, 0); });
+ assert_throws_js(TypeError, function() { ctx.setTransform(1, 0, 0); });
+ assert_throws_js(TypeError, function() { ctx.setTransform(1, 0, 0, 1); });
+ assert_throws_js(TypeError, function() { ctx.setTransform(1, 0, 0, 1, 0); });
+}
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(); });
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(0); });
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(0, 0); });
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(0, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0, 1, 0); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0, 1, 0, 0); });
+assert_throws_js(TypeError, function() { ctx.createPattern(canvas); });
+assert_throws_js(TypeError, function() { ctx.clearRect(); });
+assert_throws_js(TypeError, function() { ctx.clearRect(0); });
+assert_throws_js(TypeError, function() { ctx.clearRect(0, 0); });
+assert_throws_js(TypeError, function() { ctx.clearRect(0, 0, 0); });
+assert_throws_js(TypeError, function() { ctx.fillRect(); });
+assert_throws_js(TypeError, function() { ctx.fillRect(0); });
+assert_throws_js(TypeError, function() { ctx.fillRect(0, 0); });
+assert_throws_js(TypeError, function() { ctx.fillRect(0, 0, 0); });
+assert_throws_js(TypeError, function() { ctx.strokeRect(); });
+assert_throws_js(TypeError, function() { ctx.strokeRect(0); });
+assert_throws_js(TypeError, function() { ctx.strokeRect(0, 0); });
+assert_throws_js(TypeError, function() { ctx.strokeRect(0, 0, 0); });
+assert_throws_js(TypeError, function() { ctx.moveTo(); });
+assert_throws_js(TypeError, function() { ctx.moveTo(0); });
+assert_throws_js(TypeError, function() { ctx.lineTo(); });
+assert_throws_js(TypeError, function() { ctx.lineTo(0); });
+assert_throws_js(TypeError, function() { ctx.quadraticCurveTo(); });
+assert_throws_js(TypeError, function() { ctx.quadraticCurveTo(0); });
+assert_throws_js(TypeError, function() { ctx.quadraticCurveTo(0, 0); });
+assert_throws_js(TypeError, function() { ctx.quadraticCurveTo(0, 0, 0); });
+assert_throws_js(TypeError, function() { ctx.bezierCurveTo(); });
+assert_throws_js(TypeError, function() { ctx.bezierCurveTo(0); });
+assert_throws_js(TypeError, function() { ctx.bezierCurveTo(0, 0); });
+assert_throws_js(TypeError, function() { ctx.bezierCurveTo(0, 0, 0); });
+assert_throws_js(TypeError, function() { ctx.bezierCurveTo(0, 0, 0, 0); });
+assert_throws_js(TypeError, function() { ctx.bezierCurveTo(0, 0, 0, 0, 0); });
+assert_throws_js(TypeError, function() { ctx.arcTo(); });
+assert_throws_js(TypeError, function() { ctx.arcTo(0); });
+assert_throws_js(TypeError, function() { ctx.arcTo(0, 0); });
+assert_throws_js(TypeError, function() { ctx.arcTo(0, 0, 0); });
+assert_throws_js(TypeError, function() { ctx.arcTo(0, 0, 0, 0); });
+assert_throws_js(TypeError, function() { ctx.rect(); });
+assert_throws_js(TypeError, function() { ctx.rect(0); });
+assert_throws_js(TypeError, function() { ctx.rect(0, 0); });
+assert_throws_js(TypeError, function() { ctx.rect(0, 0, 0); });
+assert_throws_js(TypeError, function() { ctx.arc(); });
+assert_throws_js(TypeError, function() { ctx.arc(0); });
+assert_throws_js(TypeError, function() { ctx.arc(0, 0); });
+assert_throws_js(TypeError, function() { ctx.arc(0, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.arc(0, 0, 1, 0); });
+// (6th argument to arc is optional)
+if (ctx.isPointInPath) {
+ assert_throws_js(TypeError, function() { ctx.isPointInPath(); });
+ assert_throws_js(TypeError, function() { ctx.isPointInPath(0); });
+}
+if (ctx.drawFocusRing) {
+ assert_throws_js(TypeError, function() { ctx.drawFocusRing(); });
+ assert_throws_js(TypeError, function() { ctx.drawFocusRing(canvas); });
+ assert_throws_js(TypeError, function() { ctx.drawFocusRing(canvas, 0); });
+}
+if (ctx.fillText) {
+ assert_throws_js(TypeError, function() { ctx.fillText(); });
+ assert_throws_js(TypeError, function() { ctx.fillText('test'); });
+ assert_throws_js(TypeError, function() { ctx.fillText('test', 0); });
+ assert_throws_js(TypeError, function() { ctx.strokeText(); });
+ assert_throws_js(TypeError, function() { ctx.strokeText('test'); });
+ assert_throws_js(TypeError, function() { ctx.strokeText('test', 0); });
+ assert_throws_js(TypeError, function() { ctx.measureText(); });
+}
+assert_throws_js(TypeError, function() { ctx.drawImage(); });
+assert_throws_js(TypeError, function() { ctx.drawImage(canvas); });
+assert_throws_js(TypeError, function() { ctx.drawImage(canvas, 0); });
+// TODO: n >= 3 args on drawImage could be either a valid overload,
+// or too few for another overload, or too many for another
+// overload - what should happen?
+if (ctx.createImageData) {
+ assert_throws_js(TypeError, function() { ctx.createImageData(); });
+ assert_throws_js(TypeError, function() { ctx.createImageData(1); });
+}
+if (ctx.getImageData) {
+ assert_throws_js(TypeError, function() { ctx.getImageData(); });
+ assert_throws_js(TypeError, function() { ctx.getImageData(0); });
+ assert_throws_js(TypeError, function() { ctx.getImageData(0, 0); });
+ assert_throws_js(TypeError, function() { ctx.getImageData(0, 0, 1); });
+}
+if (ctx.putImageData) {
+ var imgdata = ctx.getImageData(0, 0, 1, 1);
+ assert_throws_js(TypeError, function() { ctx.putImageData(); });
+ assert_throws_js(TypeError, function() { ctx.putImageData(imgdata); });
+ assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 0); });
+}
+var g = ctx.createLinearGradient(0, 0, 0, 0);
+assert_throws_js(TypeError, function() { g.addColorStop(); });
+assert_throws_js(TypeError, function() { g.addColorStop(0); });
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/conformance-requirements/2d.conformance.requirements.missingargs.worker.js b/testing/web-platform/tests/html/canvas/offscreen/conformance-requirements/2d.conformance.requirements.missingargs.worker.js
new file mode 100644
index 0000000000..fe1b111f05
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/conformance-requirements/2d.conformance.requirements.missingargs.worker.js
@@ -0,0 +1,137 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.conformance.requirements.missingargs
+// Description:Missing arguments cause TypeError
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Missing arguments cause TypeError");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_js(TypeError, function() { ctx.scale(); });
+assert_throws_js(TypeError, function() { ctx.scale(1); });
+assert_throws_js(TypeError, function() { ctx.rotate(); });
+assert_throws_js(TypeError, function() { ctx.translate(); });
+assert_throws_js(TypeError, function() { ctx.translate(0); });
+if (ctx.transform) { // (avoid spurious failures, since the aim here is not to test that all features are supported)
+ assert_throws_js(TypeError, function() { ctx.transform(); });
+ assert_throws_js(TypeError, function() { ctx.transform(1); });
+ assert_throws_js(TypeError, function() { ctx.transform(1, 0); });
+ assert_throws_js(TypeError, function() { ctx.transform(1, 0, 0); });
+ assert_throws_js(TypeError, function() { ctx.transform(1, 0, 0, 1); });
+ assert_throws_js(TypeError, function() { ctx.transform(1, 0, 0, 1, 0); });
+}
+if (ctx.setTransform) {
+ assert_throws_js(TypeError, function() { ctx.setTransform(1); });
+ assert_throws_js(TypeError, function() { ctx.setTransform(1, 0); });
+ assert_throws_js(TypeError, function() { ctx.setTransform(1, 0, 0); });
+ assert_throws_js(TypeError, function() { ctx.setTransform(1, 0, 0, 1); });
+ assert_throws_js(TypeError, function() { ctx.setTransform(1, 0, 0, 1, 0); });
+}
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(); });
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(0); });
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(0, 0); });
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(0, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0, 1, 0); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0, 1, 0, 0); });
+assert_throws_js(TypeError, function() { ctx.createPattern(canvas); });
+assert_throws_js(TypeError, function() { ctx.clearRect(); });
+assert_throws_js(TypeError, function() { ctx.clearRect(0); });
+assert_throws_js(TypeError, function() { ctx.clearRect(0, 0); });
+assert_throws_js(TypeError, function() { ctx.clearRect(0, 0, 0); });
+assert_throws_js(TypeError, function() { ctx.fillRect(); });
+assert_throws_js(TypeError, function() { ctx.fillRect(0); });
+assert_throws_js(TypeError, function() { ctx.fillRect(0, 0); });
+assert_throws_js(TypeError, function() { ctx.fillRect(0, 0, 0); });
+assert_throws_js(TypeError, function() { ctx.strokeRect(); });
+assert_throws_js(TypeError, function() { ctx.strokeRect(0); });
+assert_throws_js(TypeError, function() { ctx.strokeRect(0, 0); });
+assert_throws_js(TypeError, function() { ctx.strokeRect(0, 0, 0); });
+assert_throws_js(TypeError, function() { ctx.moveTo(); });
+assert_throws_js(TypeError, function() { ctx.moveTo(0); });
+assert_throws_js(TypeError, function() { ctx.lineTo(); });
+assert_throws_js(TypeError, function() { ctx.lineTo(0); });
+assert_throws_js(TypeError, function() { ctx.quadraticCurveTo(); });
+assert_throws_js(TypeError, function() { ctx.quadraticCurveTo(0); });
+assert_throws_js(TypeError, function() { ctx.quadraticCurveTo(0, 0); });
+assert_throws_js(TypeError, function() { ctx.quadraticCurveTo(0, 0, 0); });
+assert_throws_js(TypeError, function() { ctx.bezierCurveTo(); });
+assert_throws_js(TypeError, function() { ctx.bezierCurveTo(0); });
+assert_throws_js(TypeError, function() { ctx.bezierCurveTo(0, 0); });
+assert_throws_js(TypeError, function() { ctx.bezierCurveTo(0, 0, 0); });
+assert_throws_js(TypeError, function() { ctx.bezierCurveTo(0, 0, 0, 0); });
+assert_throws_js(TypeError, function() { ctx.bezierCurveTo(0, 0, 0, 0, 0); });
+assert_throws_js(TypeError, function() { ctx.arcTo(); });
+assert_throws_js(TypeError, function() { ctx.arcTo(0); });
+assert_throws_js(TypeError, function() { ctx.arcTo(0, 0); });
+assert_throws_js(TypeError, function() { ctx.arcTo(0, 0, 0); });
+assert_throws_js(TypeError, function() { ctx.arcTo(0, 0, 0, 0); });
+assert_throws_js(TypeError, function() { ctx.rect(); });
+assert_throws_js(TypeError, function() { ctx.rect(0); });
+assert_throws_js(TypeError, function() { ctx.rect(0, 0); });
+assert_throws_js(TypeError, function() { ctx.rect(0, 0, 0); });
+assert_throws_js(TypeError, function() { ctx.arc(); });
+assert_throws_js(TypeError, function() { ctx.arc(0); });
+assert_throws_js(TypeError, function() { ctx.arc(0, 0); });
+assert_throws_js(TypeError, function() { ctx.arc(0, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.arc(0, 0, 1, 0); });
+// (6th argument to arc is optional)
+if (ctx.isPointInPath) {
+ assert_throws_js(TypeError, function() { ctx.isPointInPath(); });
+ assert_throws_js(TypeError, function() { ctx.isPointInPath(0); });
+}
+if (ctx.drawFocusRing) {
+ assert_throws_js(TypeError, function() { ctx.drawFocusRing(); });
+ assert_throws_js(TypeError, function() { ctx.drawFocusRing(canvas); });
+ assert_throws_js(TypeError, function() { ctx.drawFocusRing(canvas, 0); });
+}
+if (ctx.fillText) {
+ assert_throws_js(TypeError, function() { ctx.fillText(); });
+ assert_throws_js(TypeError, function() { ctx.fillText('test'); });
+ assert_throws_js(TypeError, function() { ctx.fillText('test', 0); });
+ assert_throws_js(TypeError, function() { ctx.strokeText(); });
+ assert_throws_js(TypeError, function() { ctx.strokeText('test'); });
+ assert_throws_js(TypeError, function() { ctx.strokeText('test', 0); });
+ assert_throws_js(TypeError, function() { ctx.measureText(); });
+}
+assert_throws_js(TypeError, function() { ctx.drawImage(); });
+assert_throws_js(TypeError, function() { ctx.drawImage(canvas); });
+assert_throws_js(TypeError, function() { ctx.drawImage(canvas, 0); });
+// TODO: n >= 3 args on drawImage could be either a valid overload,
+// or too few for another overload, or too many for another
+// overload - what should happen?
+if (ctx.createImageData) {
+ assert_throws_js(TypeError, function() { ctx.createImageData(); });
+ assert_throws_js(TypeError, function() { ctx.createImageData(1); });
+}
+if (ctx.getImageData) {
+ assert_throws_js(TypeError, function() { ctx.getImageData(); });
+ assert_throws_js(TypeError, function() { ctx.getImageData(0); });
+ assert_throws_js(TypeError, function() { ctx.getImageData(0, 0); });
+ assert_throws_js(TypeError, function() { ctx.getImageData(0, 0, 1); });
+}
+if (ctx.putImageData) {
+ var imgdata = ctx.getImageData(0, 0, 1, 1);
+ assert_throws_js(TypeError, function() { ctx.putImageData(); });
+ assert_throws_js(TypeError, function() { ctx.putImageData(imgdata); });
+ assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 0); });
+}
+var g = ctx.createLinearGradient(0, 0, 0, 0);
+assert_throws_js(TypeError, function() { g.addColorStop(); });
+assert_throws_js(TypeError, function() { g.addColorStop(0); });
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.3arg.html b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.3arg.html
new file mode 100644
index 0000000000..8e144b1ba6
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.3arg.html
@@ -0,0 +1,59 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.drawImage.3arg</title>
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.drawImage.3arg</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var promise1 = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/red.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+var promise2 = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/green.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+Promise.all([promise1, promise2]).then(function(response1, response2) {
+ var promise3 = createImageBitmap(response1);
+ var promise4 = createImageBitmap(response2);
+ Promise.all([promise3, promise4]).then(function(bitmap1, bitmap2) {
+ ctx.drawImage(bitmap2, 0, 0);
+ ctx.drawImage(bitmap1, -100, 0);
+ ctx.drawImage(bitmap1, 100, 0);
+ ctx.drawImage(bitmap1, 0, -50);
+ ctx.drawImage(bitmap1, 0, 50);
+ _assertPixelApprox(canvas, 0,0, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 99,0, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 0,49, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 99,49, 0,255,0,255, 2);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.3arg.worker.js b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.3arg.worker.js
new file mode 100644
index 0000000000..22cb3653e4
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.3arg.worker.js
@@ -0,0 +1,55 @@
+// META: timeout=long
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.drawImage.3arg
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var promise1 = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/red.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+var promise2 = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/green.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+Promise.all([promise1, promise2]).then(function(response1, response2) {
+ var promise3 = createImageBitmap(response1);
+ var promise4 = createImageBitmap(response2);
+ Promise.all([promise3, promise4]).then(function(bitmap1, bitmap2) {
+ ctx.drawImage(bitmap2, 0, 0);
+ ctx.drawImage(bitmap1, -100, 0);
+ ctx.drawImage(bitmap1, 100, 0);
+ ctx.drawImage(bitmap1, 0, -50);
+ ctx.drawImage(bitmap1, 0, 50);
+ _assertPixelApprox(canvas, 0,0, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 99,0, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 0,49, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 99,49, 0,255,0,255, 2);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.5arg.html b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.5arg.html
new file mode 100644
index 0000000000..c383d1a417
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.5arg.html
@@ -0,0 +1,60 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.drawImage.5arg</title>
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.drawImage.5arg</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var promise1 = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/red.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+var promise2 = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/green.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+Promise.all([promise1, promise2]).then(function(response1, response2) {
+ var promise3 = createImageBitmap(response1);
+ var promise4 = createImageBitmap(response2);
+ Promise.all([promise3, promise4]).then(function(bitmap1, bitmap2) {
+ ctx.drawImage(bitmap2, 50, 0, 50, 50);
+ ctx.drawImage(bitmap1, 0, 0, 50, 50);
+ ctx.fillStyle = '#0f0';
+ ctx.fillRect(0, 0, 50, 50);
+ _assertPixelApprox(canvas, 0,0, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 99,0, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 0,49, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 99,49, 0,255,0,255, 2);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.5arg.worker.js b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.5arg.worker.js
new file mode 100644
index 0000000000..3906a5a00b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.5arg.worker.js
@@ -0,0 +1,56 @@
+// META: timeout=long
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.drawImage.5arg
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var promise1 = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/red.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+var promise2 = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/green.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+Promise.all([promise1, promise2]).then(function(response1, response2) {
+ var promise3 = createImageBitmap(response1);
+ var promise4 = createImageBitmap(response2);
+ Promise.all([promise3, promise4]).then(function(bitmap1, bitmap2) {
+ ctx.drawImage(bitmap2, 50, 0, 50, 50);
+ ctx.drawImage(bitmap1, 0, 0, 50, 50);
+ ctx.fillStyle = '#0f0';
+ ctx.fillRect(0, 0, 50, 50);
+ _assertPixelApprox(canvas, 0,0, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 99,0, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 0,49, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 99,49, 0,255,0,255, 2);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.basic.html b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.basic.html
new file mode 100644
index 0000000000..72ffb4ee3b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.basic.html
@@ -0,0 +1,46 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.drawImage.9arg.basic</title>
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.drawImage.9arg.basic</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/green.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 0, 0, 100, 50, 0, 0, 100, 50);
+ _assertPixelApprox(canvas, 0,0, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 99,0, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 0,49, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 99,49, 0,255,0,255, 2);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.basic.worker.js b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.basic.worker.js
new file mode 100644
index 0000000000..244bc90fe7
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.basic.worker.js
@@ -0,0 +1,42 @@
+// META: timeout=long
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.drawImage.9arg.basic
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/green.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 0, 0, 100, 50, 0, 0, 100, 50);
+ _assertPixelApprox(canvas, 0,0, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 99,0, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 0,49, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 99,49, 0,255,0,255, 2);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.destpos.html b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.destpos.html
new file mode 100644
index 0000000000..ddfa0cbf7c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.destpos.html
@@ -0,0 +1,61 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.drawImage.9arg.destpos</title>
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.drawImage.9arg.destpos</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var promise1 = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/red.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+var promise2 = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/green.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+Promise.all([promise1, promise2]).then(function(response1, response2) {
+ var promise3 = createImageBitmap(response1);
+ var promise4 = createImageBitmap(response2);
+ Promise.all([promise3, promise4]).then(function(bitmap1, bitmap2) {
+ ctx.drawImage(bitmap2, 0, 0, 100, 50, 0, 0, 100, 50);
+ ctx.drawImage(bitmap1, 0, 0, 100, 50, -100, 0, 100, 50);
+ ctx.drawImage(bitmap1, 0, 0, 100, 50, 100, 0, 100, 50);
+ ctx.drawImage(bitmap1, 0, 0, 100, 50, 0, -50, 100, 50);
+ ctx.drawImage(bitmap1, 0, 0, 100, 50, 0, 50, 100, 50);
+ _assertPixelApprox(canvas, 0,0, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 99,0, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 0,49, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 99,49, 0,255,0,255, 2);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.destpos.worker.js b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.destpos.worker.js
new file mode 100644
index 0000000000..81fdae81df
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.destpos.worker.js
@@ -0,0 +1,57 @@
+// META: timeout=long
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.drawImage.9arg.destpos
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var promise1 = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/red.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+var promise2 = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/green.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+Promise.all([promise1, promise2]).then(function(response1, response2) {
+ var promise3 = createImageBitmap(response1);
+ var promise4 = createImageBitmap(response2);
+ Promise.all([promise3, promise4]).then(function(bitmap1, bitmap2) {
+ ctx.drawImage(bitmap2, 0, 0, 100, 50, 0, 0, 100, 50);
+ ctx.drawImage(bitmap1, 0, 0, 100, 50, -100, 0, 100, 50);
+ ctx.drawImage(bitmap1, 0, 0, 100, 50, 100, 0, 100, 50);
+ ctx.drawImage(bitmap1, 0, 0, 100, 50, 0, -50, 100, 50);
+ ctx.drawImage(bitmap1, 0, 0, 100, 50, 0, 50, 100, 50);
+ _assertPixelApprox(canvas, 0,0, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 99,0, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 0,49, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 99,49, 0,255,0,255, 2);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.destsize.html b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.destsize.html
new file mode 100644
index 0000000000..d94daa861e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.destsize.html
@@ -0,0 +1,61 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.drawImage.9arg.destsize</title>
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.drawImage.9arg.destsize</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var promise1 = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/red.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+var promise2 = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/green.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+Promise.all([promise1, promise2]).then(function(response1, response2) {
+ var promise3 = createImageBitmap(response1);
+ var promise4 = createImageBitmap(response2);
+ Promise.all([promise3, promise4]).then(function(bitmap1, bitmap2) {
+ ctx.drawImage(bitmap2, 1, 1, 1, 1, 0, 0, 100, 50);
+ ctx.drawImage(bitmap1, 0, 0, 100, 50, -50, 0, 50, 50);
+ ctx.drawImage(bitmap1, 0, 0, 100, 50, 100, 0, 50, 50);
+ ctx.drawImage(bitmap1, 0, 0, 100, 50, 0, -25, 100, 25);
+ ctx.drawImage(bitmap1, 0, 0, 100, 50, 0, 50, 100, 25);
+ _assertPixelApprox(canvas, 0,0, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 99,0, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 0,49, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 99,49, 0,255,0,255, 2);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.destsize.worker.js b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.destsize.worker.js
new file mode 100644
index 0000000000..60fea26afe
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.destsize.worker.js
@@ -0,0 +1,57 @@
+// META: timeout=long
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.drawImage.9arg.destsize
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var promise1 = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/red.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+var promise2 = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/green.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+Promise.all([promise1, promise2]).then(function(response1, response2) {
+ var promise3 = createImageBitmap(response1);
+ var promise4 = createImageBitmap(response2);
+ Promise.all([promise3, promise4]).then(function(bitmap1, bitmap2) {
+ ctx.drawImage(bitmap2, 1, 1, 1, 1, 0, 0, 100, 50);
+ ctx.drawImage(bitmap1, 0, 0, 100, 50, -50, 0, 50, 50);
+ ctx.drawImage(bitmap1, 0, 0, 100, 50, 100, 0, 50, 50);
+ ctx.drawImage(bitmap1, 0, 0, 100, 50, 0, -25, 100, 25);
+ ctx.drawImage(bitmap1, 0, 0, 100, 50, 0, 50, 100, 25);
+ _assertPixelApprox(canvas, 0,0, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 99,0, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 0,49, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 99,49, 0,255,0,255, 2);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.sourcepos.html b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.sourcepos.html
new file mode 100644
index 0000000000..ffd60f5da9
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.sourcepos.html
@@ -0,0 +1,46 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.drawImage.9arg.sourcepos</title>
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.drawImage.9arg.sourcepos</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/rgrg-256x256.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 140, 20, 100, 50, 0, 0, 100, 50);
+ _assertPixelApprox(canvas, 0,0, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 99,0, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 0,49, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 99,49, 0,255,0,255, 2);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.sourcepos.worker.js b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.sourcepos.worker.js
new file mode 100644
index 0000000000..1522353ad6
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.sourcepos.worker.js
@@ -0,0 +1,42 @@
+// META: timeout=long
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.drawImage.9arg.sourcepos
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/rgrg-256x256.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 140, 20, 100, 50, 0, 0, 100, 50);
+ _assertPixelApprox(canvas, 0,0, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 99,0, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 0,49, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 99,49, 0,255,0,255, 2);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.sourcesize.html b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.sourcesize.html
new file mode 100644
index 0000000000..91962b671b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.sourcesize.html
@@ -0,0 +1,53 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.drawImage.9arg.sourcesize</title>
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.drawImage.9arg.sourcesize</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/rgrg-256x256.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 0, 0, 256, 256, 0, 0, 100, 50);
+ ctx.fillStyle = '#0f0';
+ ctx.fillRect(0, 0, 51, 26);
+ ctx.fillRect(49, 24, 51, 26);
+ _assertPixelApprox(canvas, 0,0, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 99,0, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 0,49, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 99,49, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 20,20, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 80,20, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 20,30, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 80,30, 0,255,0,255, 2);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.sourcesize.worker.js b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.sourcesize.worker.js
new file mode 100644
index 0000000000..6658e21750
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.sourcesize.worker.js
@@ -0,0 +1,49 @@
+// META: timeout=long
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.drawImage.9arg.sourcesize
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/rgrg-256x256.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 0, 0, 256, 256, 0, 0, 100, 50);
+ ctx.fillStyle = '#0f0';
+ ctx.fillRect(0, 0, 51, 26);
+ ctx.fillRect(49, 24, 51, 26);
+ _assertPixelApprox(canvas, 0,0, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 99,0, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 0,49, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 99,49, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 20,20, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 80,20, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 20,30, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 80,30, 0,255,0,255, 2);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.alpha.html b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.alpha.html
new file mode 100644
index 0000000000..505c3fde5d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.alpha.html
@@ -0,0 +1,44 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.drawImage.alpha</title>
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.drawImage.alpha</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalAlpha = 0;
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/red.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 0, 0);
+ _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.alpha.worker.js b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.alpha.worker.js
new file mode 100644
index 0000000000..92cb23fe14
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.alpha.worker.js
@@ -0,0 +1,40 @@
+// META: timeout=long
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.drawImage.alpha
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalAlpha = 0;
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/red.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 0, 0);
+ _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.animated.poster.html b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.animated.poster.html
new file mode 100644
index 0000000000..59d79fd717
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.animated.poster.html
@@ -0,0 +1,41 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.drawImage.animated.poster</title>
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.drawImage.animated.poster</h1>
+<p class="desc">drawImage() of an APNG draws the poster frame</p>
+
+
+<script>
+var t = async_test("drawImage() of an APNG draws the poster frame");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/anim-poster-gr.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 0, 0);
+ _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.animated.poster.worker.js b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.animated.poster.worker.js
new file mode 100644
index 0000000000..94ca08a075
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.animated.poster.worker.js
@@ -0,0 +1,37 @@
+// META: timeout=long
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.drawImage.animated.poster
+// Description:drawImage() of an APNG draws the poster frame
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("drawImage() of an APNG draws the poster frame");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/anim-poster-gr.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 0, 0);
+ _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.broken.html b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.broken.html
new file mode 100644
index 0000000000..3324bebcbf
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.broken.html
@@ -0,0 +1,43 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.drawImage.broken</title>
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.drawImage.broken</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/broken.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.fillStyle = '#0f0';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.drawImage(bitmap, 0, 0);
+ _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.broken.worker.js b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.broken.worker.js
new file mode 100644
index 0000000000..d3f1b7e4a1
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.broken.worker.js
@@ -0,0 +1,39 @@
+// META: timeout=long
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.drawImage.broken
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/broken.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.fillStyle = '#0f0';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.drawImage(bitmap, 0, 0);
+ _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.canvas.html b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.canvas.html
new file mode 100644
index 0000000000..9b12871086
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.canvas.html
@@ -0,0 +1,37 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.drawImage.canvas</title>
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.drawImage.canvas</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+var ctx2 = offscreenCanvas2.getContext('2d');
+ctx2.fillStyle = '#0f0';
+ctx2.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.drawImage(offscreenCanvas2, 0, 0);
+_assertPixelApprox(canvas, 0,0, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 99,0, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 0,49, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 99,49, 0,255,0,255, 2);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.canvas.worker.js b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.canvas.worker.js
new file mode 100644
index 0000000000..da01a86ba0
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.canvas.worker.js
@@ -0,0 +1,33 @@
+// META: timeout=long
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.drawImage.canvas
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+var ctx2 = offscreenCanvas2.getContext('2d');
+ctx2.fillStyle = '#0f0';
+ctx2.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.drawImage(offscreenCanvas2, 0, 0);
+_assertPixelApprox(canvas, 0,0, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 99,0, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 0,49, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 99,49, 0,255,0,255, 2);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.clip.html b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.clip.html
new file mode 100644
index 0000000000..fa31852158
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.clip.html
@@ -0,0 +1,45 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.drawImage.clip</title>
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.drawImage.clip</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.rect(-10, -10, 1, 1);
+ctx.clip();
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/red.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 0, 0);
+ _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.clip.worker.js b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.clip.worker.js
new file mode 100644
index 0000000000..d30a05fa9d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.clip.worker.js
@@ -0,0 +1,41 @@
+// META: timeout=long
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.drawImage.clip
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.rect(-10, -10, 1, 1);
+ctx.clip();
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/red.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 0, 0);
+ _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.composite.html b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.composite.html
new file mode 100644
index 0000000000..de4ea40d7d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.composite.html
@@ -0,0 +1,44 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.drawImage.composite</title>
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.drawImage.composite</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'destination-over';
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/red.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 0, 0);
+ _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.composite.worker.js b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.composite.worker.js
new file mode 100644
index 0000000000..0c4a7fe10a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.composite.worker.js
@@ -0,0 +1,40 @@
+// META: timeout=long
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.drawImage.composite
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'destination-over';
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/red.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 0, 0);
+ _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.floatsource.html b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.floatsource.html
new file mode 100644
index 0000000000..5f72973782
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.floatsource.html
@@ -0,0 +1,41 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.drawImage.floatsource</title>
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.drawImage.floatsource</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/green.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 10.1, 10.1, 0.1, 0.1, 0, 0, 100, 50);
+ _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.floatsource.worker.js b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.floatsource.worker.js
new file mode 100644
index 0000000000..7b16cbb4f5
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.floatsource.worker.js
@@ -0,0 +1,37 @@
+// META: timeout=long
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.drawImage.floatsource
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/green.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 10.1, 10.1, 0.1, 0.1, 0, 0, 100, 50);
+ _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativedest.html b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativedest.html
new file mode 100644
index 0000000000..5851fcfb03
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativedest.html
@@ -0,0 +1,53 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.drawImage.negativedest</title>
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.drawImage.negativedest</h1>
+<p class="desc">Negative destination width/height represents the correct rectangle</p>
+
+
+<script>
+var t = async_test("Negative destination width/height represents the correct rectangle");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/ggrr-256x256.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 100, 78, 50, 50, 0, 50, 50, -50);
+ ctx.drawImage(bitmap, 100, 128, 50, -50, 100, 50, -50, -50);
+ _assertPixelApprox(canvas, 1,1, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 1,48, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 98,1, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 98,48, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 48,1, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 48,48, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 51,1, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 51,48, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativedest.worker.js b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativedest.worker.js
new file mode 100644
index 0000000000..5ca4d14ef6
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativedest.worker.js
@@ -0,0 +1,49 @@
+// META: timeout=long
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.drawImage.negativedest
+// Description:Negative destination width/height represents the correct rectangle
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Negative destination width/height represents the correct rectangle");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/ggrr-256x256.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 100, 78, 50, 50, 0, 50, 50, -50);
+ ctx.drawImage(bitmap, 100, 128, 50, -50, 100, 50, -50, -50);
+ _assertPixelApprox(canvas, 1,1, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 1,48, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 98,1, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 98,48, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 48,1, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 48,48, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 51,1, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 51,48, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativedir.html b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativedir.html
new file mode 100644
index 0000000000..f9d820733d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativedir.html
@@ -0,0 +1,53 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.drawImage.negativedir</title>
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.drawImage.negativedir</h1>
+<p class="desc">Negative dimensions do not affect the direction of the image</p>
+
+
+<script>
+var t = async_test("Negative dimensions do not affect the direction of the image");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/ggrr-256x256.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 0, 178, 50, -100, 0, 0, 50, 100);
+ ctx.drawImage(bitmap, 0, 78, 50, 100, 50, 100, 50, -100);
+ _assertPixelApprox(canvas, 1,1, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 1,48, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 98,1, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 98,48, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 48,1, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 48,48, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 51,1, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 51,48, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativedir.worker.js b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativedir.worker.js
new file mode 100644
index 0000000000..2a6cc81058
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativedir.worker.js
@@ -0,0 +1,49 @@
+// META: timeout=long
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.drawImage.negativedir
+// Description:Negative dimensions do not affect the direction of the image
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Negative dimensions do not affect the direction of the image");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/ggrr-256x256.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 0, 178, 50, -100, 0, 0, 50, 100);
+ ctx.drawImage(bitmap, 0, 78, 50, 100, 50, 100, 50, -100);
+ _assertPixelApprox(canvas, 1,1, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 1,48, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 98,1, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 98,48, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 48,1, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 48,48, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 51,1, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 51,48, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativesource.html b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativesource.html
new file mode 100644
index 0000000000..9c2a2a1b10
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativesource.html
@@ -0,0 +1,53 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.drawImage.negativesource</title>
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.drawImage.negativesource</h1>
+<p class="desc">Negative source width/height represents the correct rectangle</p>
+
+
+<script>
+var t = async_test("Negative source width/height represents the correct rectangle");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/ggrr-256x256.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 100, 78, -100, 50, 0, 0, 50, 50);
+ ctx.drawImage(bitmap, 100, 128, -100, -50, 50, 0, 50, 50);
+ _assertPixelApprox(canvas, 1,1, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 1,48, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 98,1, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 98,48, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 48,1, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 48,48, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 51,1, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 51,48, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativesource.worker.js b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativesource.worker.js
new file mode 100644
index 0000000000..ada79f9137
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativesource.worker.js
@@ -0,0 +1,49 @@
+// META: timeout=long
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.drawImage.negativesource
+// Description:Negative source width/height represents the correct rectangle
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Negative source width/height represents the correct rectangle");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/ggrr-256x256.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 100, 78, -100, 50, 0, 0, 50, 50);
+ ctx.drawImage(bitmap, 100, 128, -100, -50, 50, 0, 50, 50);
+ _assertPixelApprox(canvas, 1,1, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 1,48, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 98,1, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 98,48, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 48,1, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 48,48, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 51,1, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 51,48, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.nonfinite.html b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.nonfinite.html
new file mode 100644
index 0000000000..54f8d95269
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.nonfinite.html
@@ -0,0 +1,343 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.drawImage.nonfinite</title>
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.drawImage.nonfinite</h1>
+<p class="desc">drawImage() with Infinity/NaN is ignored</p>
+
+
+<script>
+var t = async_test("drawImage() with Infinity/NaN is ignored");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/redtransparent.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, Infinity, 0);
+ctx.drawImage(bitmap, -Infinity, 0);
+ctx.drawImage(bitmap, NaN, 0);
+ctx.drawImage(bitmap, 0, Infinity);
+ctx.drawImage(bitmap, 0, -Infinity);
+ctx.drawImage(bitmap, 0, NaN);
+ctx.drawImage(bitmap, Infinity, Infinity);
+ ctx.drawImage(bitmap, Infinity, 0, 100, 50);
+ctx.drawImage(bitmap, -Infinity, 0, 100, 50);
+ctx.drawImage(bitmap, NaN, 0, 100, 50);
+ctx.drawImage(bitmap, 0, Infinity, 100, 50);
+ctx.drawImage(bitmap, 0, -Infinity, 100, 50);
+ctx.drawImage(bitmap, 0, NaN, 100, 50);
+ctx.drawImage(bitmap, 0, 0, Infinity, 50);
+ctx.drawImage(bitmap, 0, 0, -Infinity, 50);
+ctx.drawImage(bitmap, 0, 0, NaN, 50);
+ctx.drawImage(bitmap, 0, 0, 100, Infinity);
+ctx.drawImage(bitmap, 0, 0, 100, -Infinity);
+ctx.drawImage(bitmap, 0, 0, 100, NaN);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, 100, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, 0, 0, Infinity, Infinity);
+ ctx.drawImage(bitmap, Infinity, 0, 100, 50, 0, 0, 100, 50);
+ctx.drawImage(bitmap, -Infinity, 0, 100, 50, 0, 0, 100, 50);
+ctx.drawImage(bitmap, NaN, 0, 100, 50, 0, 0, 100, 50);
+ctx.drawImage(bitmap, 0, Infinity, 100, 50, 0, 0, 100, 50);
+ctx.drawImage(bitmap, 0, -Infinity, 100, 50, 0, 0, 100, 50);
+ctx.drawImage(bitmap, 0, NaN, 100, 50, 0, 0, 100, 50);
+ctx.drawImage(bitmap, 0, 0, Infinity, 50, 0, 0, 100, 50);
+ctx.drawImage(bitmap, 0, 0, -Infinity, 50, 0, 0, 100, 50);
+ctx.drawImage(bitmap, 0, 0, NaN, 50, 0, 0, 100, 50);
+ctx.drawImage(bitmap, 0, 0, 100, Infinity, 0, 0, 100, 50);
+ctx.drawImage(bitmap, 0, 0, 100, -Infinity, 0, 0, 100, 50);
+ctx.drawImage(bitmap, 0, 0, 100, NaN, 0, 0, 100, 50);
+ctx.drawImage(bitmap, 0, 0, 100, 50, Infinity, 0, 100, 50);
+ctx.drawImage(bitmap, 0, 0, 100, 50, -Infinity, 0, 100, 50);
+ctx.drawImage(bitmap, 0, 0, 100, 50, NaN, 0, 100, 50);
+ctx.drawImage(bitmap, 0, 0, 100, 50, 0, Infinity, 100, 50);
+ctx.drawImage(bitmap, 0, 0, 100, 50, 0, -Infinity, 100, 50);
+ctx.drawImage(bitmap, 0, 0, 100, 50, 0, NaN, 100, 50);
+ctx.drawImage(bitmap, 0, 0, 100, 50, 0, 0, Infinity, 50);
+ctx.drawImage(bitmap, 0, 0, 100, 50, 0, 0, -Infinity, 50);
+ctx.drawImage(bitmap, 0, 0, 100, 50, 0, 0, NaN, 50);
+ctx.drawImage(bitmap, 0, 0, 100, 50, 0, 0, 100, Infinity);
+ctx.drawImage(bitmap, 0, 0, 100, 50, 0, 0, 100, -Infinity);
+ctx.drawImage(bitmap, 0, 0, 100, 50, 0, 0, 100, NaN);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, 50, 0, 0, 100, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, 50, 0, 0, 100, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, Infinity, 0, 0, 100, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, Infinity, Infinity, 0, 100, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, Infinity, Infinity, Infinity, 100, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, Infinity, Infinity, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, Infinity, Infinity, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, Infinity, Infinity, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, Infinity, Infinity, 0, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, Infinity, Infinity, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, Infinity, Infinity, 0, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, Infinity, 0, Infinity, 100, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, Infinity, 0, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, Infinity, 0, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, Infinity, 0, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, Infinity, 0, 0, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, Infinity, 0, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, Infinity, 0, 0, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, 50, Infinity, 0, 100, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, 50, Infinity, Infinity, 100, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, 50, Infinity, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, 50, Infinity, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, 50, Infinity, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, 50, Infinity, 0, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, 50, Infinity, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, 50, Infinity, 0, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, 50, 0, Infinity, 100, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, 50, 0, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, 50, 0, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, 50, 0, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, 50, 0, 0, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, 50, 0, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, 50, 0, 0, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, Infinity, 0, 0, 100, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, Infinity, Infinity, 0, 100, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, Infinity, Infinity, Infinity, 100, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, Infinity, Infinity, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, Infinity, Infinity, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, Infinity, Infinity, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, Infinity, Infinity, 0, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, Infinity, Infinity, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, Infinity, Infinity, 0, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, Infinity, 0, Infinity, 100, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, Infinity, 0, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, Infinity, 0, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, Infinity, 0, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, Infinity, 0, 0, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, Infinity, 0, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, Infinity, 0, 0, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, 50, Infinity, 0, 100, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, 50, Infinity, Infinity, 100, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, 50, Infinity, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, 50, Infinity, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, 50, Infinity, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, 50, Infinity, 0, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, 50, Infinity, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, 50, Infinity, 0, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, 50, 0, Infinity, 100, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, 50, 0, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, 50, 0, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, 50, 0, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, 50, 0, 0, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, 50, 0, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, 50, 0, 0, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, 50, 0, 0, 100, 50);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, Infinity, 0, 0, 100, 50);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, Infinity, Infinity, 0, 100, 50);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, Infinity, Infinity, Infinity, 100, 50);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, Infinity, Infinity, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, Infinity, Infinity, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, Infinity, Infinity, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, Infinity, Infinity, 0, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, Infinity, Infinity, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, Infinity, Infinity, 0, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, Infinity, 0, Infinity, 100, 50);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, Infinity, 0, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, Infinity, 0, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, Infinity, 0, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, Infinity, 0, 0, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, Infinity, 0, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, Infinity, 0, 0, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, 50, Infinity, 0, 100, 50);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, 50, Infinity, Infinity, 100, 50);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, 50, Infinity, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, 50, Infinity, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, 50, Infinity, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, 50, Infinity, 0, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, 50, Infinity, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, 50, Infinity, 0, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, 50, 0, Infinity, 100, 50);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, 50, 0, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, 50, 0, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, 50, 0, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, 50, 0, 0, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, 50, 0, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, 50, 0, 0, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, 100, Infinity, 0, 0, 100, 50);
+ctx.drawImage(bitmap, Infinity, 0, 100, Infinity, Infinity, 0, 100, 50);
+ctx.drawImage(bitmap, Infinity, 0, 100, Infinity, Infinity, Infinity, 100, 50);
+ctx.drawImage(bitmap, Infinity, 0, 100, Infinity, Infinity, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, 0, 100, Infinity, Infinity, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, 100, Infinity, Infinity, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, 100, Infinity, Infinity, 0, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, 0, 100, Infinity, Infinity, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, 100, Infinity, Infinity, 0, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, 100, Infinity, 0, Infinity, 100, 50);
+ctx.drawImage(bitmap, Infinity, 0, 100, Infinity, 0, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, 0, 100, Infinity, 0, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, 100, Infinity, 0, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, 100, Infinity, 0, 0, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, 0, 100, Infinity, 0, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, 100, Infinity, 0, 0, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, 100, 50, Infinity, 0, 100, 50);
+ctx.drawImage(bitmap, Infinity, 0, 100, 50, Infinity, Infinity, 100, 50);
+ctx.drawImage(bitmap, Infinity, 0, 100, 50, Infinity, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, 0, 100, 50, Infinity, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, 100, 50, Infinity, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, 100, 50, Infinity, 0, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, 0, 100, 50, Infinity, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, 100, 50, Infinity, 0, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, 100, 50, 0, Infinity, 100, 50);
+ctx.drawImage(bitmap, Infinity, 0, 100, 50, 0, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, 0, 100, 50, 0, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, 100, 50, 0, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, 100, 50, 0, 0, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, 0, 100, 50, 0, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, 100, 50, 0, 0, 100, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, 50, 0, 0, 100, 50);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, Infinity, 0, 0, 100, 50);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, Infinity, Infinity, 0, 100, 50);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, Infinity, Infinity, Infinity, 100, 50);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, Infinity, Infinity, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, Infinity, Infinity, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, Infinity, Infinity, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, Infinity, Infinity, 0, Infinity, 50);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, Infinity, Infinity, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, Infinity, Infinity, 0, 100, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, Infinity, 0, Infinity, 100, 50);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, Infinity, 0, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, Infinity, 0, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, Infinity, 0, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, Infinity, 0, 0, Infinity, 50);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, Infinity, 0, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, Infinity, 0, 0, 100, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, 50, Infinity, 0, 100, 50);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, 50, Infinity, Infinity, 100, 50);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, 50, Infinity, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, 50, Infinity, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, 50, Infinity, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, 50, Infinity, 0, Infinity, 50);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, 50, Infinity, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, 50, Infinity, 0, 100, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, 50, 0, Infinity, 100, 50);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, 50, 0, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, 50, 0, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, 50, 0, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, 50, 0, 0, Infinity, 50);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, 50, 0, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, 50, 0, 0, 100, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, 100, Infinity, 0, 0, 100, 50);
+ctx.drawImage(bitmap, 0, Infinity, 100, Infinity, Infinity, 0, 100, 50);
+ctx.drawImage(bitmap, 0, Infinity, 100, Infinity, Infinity, Infinity, 100, 50);
+ctx.drawImage(bitmap, 0, Infinity, 100, Infinity, Infinity, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, 0, Infinity, 100, Infinity, Infinity, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, 100, Infinity, Infinity, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, 100, Infinity, Infinity, 0, Infinity, 50);
+ctx.drawImage(bitmap, 0, Infinity, 100, Infinity, Infinity, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, 100, Infinity, Infinity, 0, 100, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, 100, Infinity, 0, Infinity, 100, 50);
+ctx.drawImage(bitmap, 0, Infinity, 100, Infinity, 0, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, 0, Infinity, 100, Infinity, 0, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, 100, Infinity, 0, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, 100, Infinity, 0, 0, Infinity, 50);
+ctx.drawImage(bitmap, 0, Infinity, 100, Infinity, 0, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, 100, Infinity, 0, 0, 100, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, 100, 50, Infinity, 0, 100, 50);
+ctx.drawImage(bitmap, 0, Infinity, 100, 50, Infinity, Infinity, 100, 50);
+ctx.drawImage(bitmap, 0, Infinity, 100, 50, Infinity, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, 0, Infinity, 100, 50, Infinity, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, 100, 50, Infinity, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, 100, 50, Infinity, 0, Infinity, 50);
+ctx.drawImage(bitmap, 0, Infinity, 100, 50, Infinity, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, 100, 50, Infinity, 0, 100, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, 100, 50, 0, Infinity, 100, 50);
+ctx.drawImage(bitmap, 0, Infinity, 100, 50, 0, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, 0, Infinity, 100, 50, 0, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, 100, 50, 0, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, 100, 50, 0, 0, Infinity, 50);
+ctx.drawImage(bitmap, 0, Infinity, 100, 50, 0, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, 100, 50, 0, 0, 100, Infinity);
+ctx.drawImage(bitmap, 0, 0, Infinity, Infinity, 0, 0, 100, 50);
+ctx.drawImage(bitmap, 0, 0, Infinity, Infinity, Infinity, 0, 100, 50);
+ctx.drawImage(bitmap, 0, 0, Infinity, Infinity, Infinity, Infinity, 100, 50);
+ctx.drawImage(bitmap, 0, 0, Infinity, Infinity, Infinity, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, 0, 0, Infinity, Infinity, Infinity, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, 0, Infinity, Infinity, Infinity, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, 0, 0, Infinity, Infinity, Infinity, 0, Infinity, 50);
+ctx.drawImage(bitmap, 0, 0, Infinity, Infinity, Infinity, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, 0, Infinity, Infinity, Infinity, 0, 100, Infinity);
+ctx.drawImage(bitmap, 0, 0, Infinity, Infinity, 0, Infinity, 100, 50);
+ctx.drawImage(bitmap, 0, 0, Infinity, Infinity, 0, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, 0, 0, Infinity, Infinity, 0, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, 0, Infinity, Infinity, 0, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, 0, 0, Infinity, Infinity, 0, 0, Infinity, 50);
+ctx.drawImage(bitmap, 0, 0, Infinity, Infinity, 0, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, 0, Infinity, Infinity, 0, 0, 100, Infinity);
+ctx.drawImage(bitmap, 0, 0, Infinity, 50, Infinity, 0, 100, 50);
+ctx.drawImage(bitmap, 0, 0, Infinity, 50, Infinity, Infinity, 100, 50);
+ctx.drawImage(bitmap, 0, 0, Infinity, 50, Infinity, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, 0, 0, Infinity, 50, Infinity, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, 0, Infinity, 50, Infinity, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, 0, 0, Infinity, 50, Infinity, 0, Infinity, 50);
+ctx.drawImage(bitmap, 0, 0, Infinity, 50, Infinity, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, 0, Infinity, 50, Infinity, 0, 100, Infinity);
+ctx.drawImage(bitmap, 0, 0, Infinity, 50, 0, Infinity, 100, 50);
+ctx.drawImage(bitmap, 0, 0, Infinity, 50, 0, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, 0, 0, Infinity, 50, 0, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, 0, Infinity, 50, 0, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, 0, 0, Infinity, 50, 0, 0, Infinity, 50);
+ctx.drawImage(bitmap, 0, 0, Infinity, 50, 0, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, 0, Infinity, 50, 0, 0, 100, Infinity);
+ctx.drawImage(bitmap, 0, 0, 100, Infinity, Infinity, 0, 100, 50);
+ctx.drawImage(bitmap, 0, 0, 100, Infinity, Infinity, Infinity, 100, 50);
+ctx.drawImage(bitmap, 0, 0, 100, Infinity, Infinity, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, 0, 0, 100, Infinity, Infinity, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, 0, 100, Infinity, Infinity, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, 0, 0, 100, Infinity, Infinity, 0, Infinity, 50);
+ctx.drawImage(bitmap, 0, 0, 100, Infinity, Infinity, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, 0, 100, Infinity, Infinity, 0, 100, Infinity);
+ctx.drawImage(bitmap, 0, 0, 100, Infinity, 0, Infinity, 100, 50);
+ctx.drawImage(bitmap, 0, 0, 100, Infinity, 0, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, 0, 0, 100, Infinity, 0, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, 0, 100, Infinity, 0, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, 0, 0, 100, Infinity, 0, 0, Infinity, 50);
+ctx.drawImage(bitmap, 0, 0, 100, Infinity, 0, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, 0, 100, Infinity, 0, 0, 100, Infinity);
+ctx.drawImage(bitmap, 0, 0, 100, 50, Infinity, Infinity, 100, 50);
+ctx.drawImage(bitmap, 0, 0, 100, 50, Infinity, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, 0, 0, 100, 50, Infinity, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, 0, 100, 50, Infinity, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, 0, 0, 100, 50, Infinity, 0, Infinity, 50);
+ctx.drawImage(bitmap, 0, 0, 100, 50, Infinity, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, 0, 100, 50, Infinity, 0, 100, Infinity);
+ctx.drawImage(bitmap, 0, 0, 100, 50, 0, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, 0, 0, 100, 50, 0, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, 0, 100, 50, 0, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, 0, 0, 100, 50, 0, 0, Infinity, Infinity);
+ _assertPixel(canvas, 50,25, 0,255,0,255);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.nonfinite.worker.js b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.nonfinite.worker.js
new file mode 100644
index 0000000000..a2e77832a2
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.nonfinite.worker.js
@@ -0,0 +1,339 @@
+// META: timeout=long
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.drawImage.nonfinite
+// Description:drawImage() with Infinity/NaN is ignored
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("drawImage() with Infinity/NaN is ignored");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/redtransparent.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, Infinity, 0);
+ctx.drawImage(bitmap, -Infinity, 0);
+ctx.drawImage(bitmap, NaN, 0);
+ctx.drawImage(bitmap, 0, Infinity);
+ctx.drawImage(bitmap, 0, -Infinity);
+ctx.drawImage(bitmap, 0, NaN);
+ctx.drawImage(bitmap, Infinity, Infinity);
+ ctx.drawImage(bitmap, Infinity, 0, 100, 50);
+ctx.drawImage(bitmap, -Infinity, 0, 100, 50);
+ctx.drawImage(bitmap, NaN, 0, 100, 50);
+ctx.drawImage(bitmap, 0, Infinity, 100, 50);
+ctx.drawImage(bitmap, 0, -Infinity, 100, 50);
+ctx.drawImage(bitmap, 0, NaN, 100, 50);
+ctx.drawImage(bitmap, 0, 0, Infinity, 50);
+ctx.drawImage(bitmap, 0, 0, -Infinity, 50);
+ctx.drawImage(bitmap, 0, 0, NaN, 50);
+ctx.drawImage(bitmap, 0, 0, 100, Infinity);
+ctx.drawImage(bitmap, 0, 0, 100, -Infinity);
+ctx.drawImage(bitmap, 0, 0, 100, NaN);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, 100, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, 0, 0, Infinity, Infinity);
+ ctx.drawImage(bitmap, Infinity, 0, 100, 50, 0, 0, 100, 50);
+ctx.drawImage(bitmap, -Infinity, 0, 100, 50, 0, 0, 100, 50);
+ctx.drawImage(bitmap, NaN, 0, 100, 50, 0, 0, 100, 50);
+ctx.drawImage(bitmap, 0, Infinity, 100, 50, 0, 0, 100, 50);
+ctx.drawImage(bitmap, 0, -Infinity, 100, 50, 0, 0, 100, 50);
+ctx.drawImage(bitmap, 0, NaN, 100, 50, 0, 0, 100, 50);
+ctx.drawImage(bitmap, 0, 0, Infinity, 50, 0, 0, 100, 50);
+ctx.drawImage(bitmap, 0, 0, -Infinity, 50, 0, 0, 100, 50);
+ctx.drawImage(bitmap, 0, 0, NaN, 50, 0, 0, 100, 50);
+ctx.drawImage(bitmap, 0, 0, 100, Infinity, 0, 0, 100, 50);
+ctx.drawImage(bitmap, 0, 0, 100, -Infinity, 0, 0, 100, 50);
+ctx.drawImage(bitmap, 0, 0, 100, NaN, 0, 0, 100, 50);
+ctx.drawImage(bitmap, 0, 0, 100, 50, Infinity, 0, 100, 50);
+ctx.drawImage(bitmap, 0, 0, 100, 50, -Infinity, 0, 100, 50);
+ctx.drawImage(bitmap, 0, 0, 100, 50, NaN, 0, 100, 50);
+ctx.drawImage(bitmap, 0, 0, 100, 50, 0, Infinity, 100, 50);
+ctx.drawImage(bitmap, 0, 0, 100, 50, 0, -Infinity, 100, 50);
+ctx.drawImage(bitmap, 0, 0, 100, 50, 0, NaN, 100, 50);
+ctx.drawImage(bitmap, 0, 0, 100, 50, 0, 0, Infinity, 50);
+ctx.drawImage(bitmap, 0, 0, 100, 50, 0, 0, -Infinity, 50);
+ctx.drawImage(bitmap, 0, 0, 100, 50, 0, 0, NaN, 50);
+ctx.drawImage(bitmap, 0, 0, 100, 50, 0, 0, 100, Infinity);
+ctx.drawImage(bitmap, 0, 0, 100, 50, 0, 0, 100, -Infinity);
+ctx.drawImage(bitmap, 0, 0, 100, 50, 0, 0, 100, NaN);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, 50, 0, 0, 100, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, 50, 0, 0, 100, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, Infinity, 0, 0, 100, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, Infinity, Infinity, 0, 100, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, Infinity, Infinity, Infinity, 100, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, Infinity, Infinity, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, Infinity, Infinity, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, Infinity, Infinity, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, Infinity, Infinity, 0, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, Infinity, Infinity, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, Infinity, Infinity, 0, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, Infinity, 0, Infinity, 100, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, Infinity, 0, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, Infinity, 0, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, Infinity, 0, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, Infinity, 0, 0, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, Infinity, 0, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, Infinity, 0, 0, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, 50, Infinity, 0, 100, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, 50, Infinity, Infinity, 100, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, 50, Infinity, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, 50, Infinity, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, 50, Infinity, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, 50, Infinity, 0, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, 50, Infinity, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, 50, Infinity, 0, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, 50, 0, Infinity, 100, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, 50, 0, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, 50, 0, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, 50, 0, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, 50, 0, 0, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, 50, 0, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, 50, 0, 0, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, Infinity, 0, 0, 100, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, Infinity, Infinity, 0, 100, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, Infinity, Infinity, Infinity, 100, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, Infinity, Infinity, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, Infinity, Infinity, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, Infinity, Infinity, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, Infinity, Infinity, 0, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, Infinity, Infinity, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, Infinity, Infinity, 0, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, Infinity, 0, Infinity, 100, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, Infinity, 0, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, Infinity, 0, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, Infinity, 0, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, Infinity, 0, 0, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, Infinity, 0, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, Infinity, 0, 0, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, 50, Infinity, 0, 100, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, 50, Infinity, Infinity, 100, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, 50, Infinity, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, 50, Infinity, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, 50, Infinity, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, 50, Infinity, 0, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, 50, Infinity, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, 50, Infinity, 0, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, 50, 0, Infinity, 100, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, 50, 0, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, 50, 0, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, 50, 0, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, 50, 0, 0, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, 50, 0, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, 50, 0, 0, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, 50, 0, 0, 100, 50);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, Infinity, 0, 0, 100, 50);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, Infinity, Infinity, 0, 100, 50);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, Infinity, Infinity, Infinity, 100, 50);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, Infinity, Infinity, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, Infinity, Infinity, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, Infinity, Infinity, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, Infinity, Infinity, 0, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, Infinity, Infinity, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, Infinity, Infinity, 0, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, Infinity, 0, Infinity, 100, 50);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, Infinity, 0, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, Infinity, 0, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, Infinity, 0, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, Infinity, 0, 0, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, Infinity, 0, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, Infinity, 0, 0, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, 50, Infinity, 0, 100, 50);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, 50, Infinity, Infinity, 100, 50);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, 50, Infinity, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, 50, Infinity, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, 50, Infinity, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, 50, Infinity, 0, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, 50, Infinity, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, 50, Infinity, 0, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, 50, 0, Infinity, 100, 50);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, 50, 0, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, 50, 0, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, 50, 0, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, 50, 0, 0, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, 50, 0, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, 50, 0, 0, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, 100, Infinity, 0, 0, 100, 50);
+ctx.drawImage(bitmap, Infinity, 0, 100, Infinity, Infinity, 0, 100, 50);
+ctx.drawImage(bitmap, Infinity, 0, 100, Infinity, Infinity, Infinity, 100, 50);
+ctx.drawImage(bitmap, Infinity, 0, 100, Infinity, Infinity, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, 0, 100, Infinity, Infinity, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, 100, Infinity, Infinity, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, 100, Infinity, Infinity, 0, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, 0, 100, Infinity, Infinity, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, 100, Infinity, Infinity, 0, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, 100, Infinity, 0, Infinity, 100, 50);
+ctx.drawImage(bitmap, Infinity, 0, 100, Infinity, 0, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, 0, 100, Infinity, 0, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, 100, Infinity, 0, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, 100, Infinity, 0, 0, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, 0, 100, Infinity, 0, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, 100, Infinity, 0, 0, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, 100, 50, Infinity, 0, 100, 50);
+ctx.drawImage(bitmap, Infinity, 0, 100, 50, Infinity, Infinity, 100, 50);
+ctx.drawImage(bitmap, Infinity, 0, 100, 50, Infinity, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, 0, 100, 50, Infinity, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, 100, 50, Infinity, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, 100, 50, Infinity, 0, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, 0, 100, 50, Infinity, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, 100, 50, Infinity, 0, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, 100, 50, 0, Infinity, 100, 50);
+ctx.drawImage(bitmap, Infinity, 0, 100, 50, 0, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, 0, 100, 50, 0, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, 100, 50, 0, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, 100, 50, 0, 0, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, 0, 100, 50, 0, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, 100, 50, 0, 0, 100, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, 50, 0, 0, 100, 50);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, Infinity, 0, 0, 100, 50);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, Infinity, Infinity, 0, 100, 50);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, Infinity, Infinity, Infinity, 100, 50);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, Infinity, Infinity, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, Infinity, Infinity, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, Infinity, Infinity, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, Infinity, Infinity, 0, Infinity, 50);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, Infinity, Infinity, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, Infinity, Infinity, 0, 100, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, Infinity, 0, Infinity, 100, 50);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, Infinity, 0, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, Infinity, 0, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, Infinity, 0, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, Infinity, 0, 0, Infinity, 50);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, Infinity, 0, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, Infinity, 0, 0, 100, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, 50, Infinity, 0, 100, 50);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, 50, Infinity, Infinity, 100, 50);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, 50, Infinity, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, 50, Infinity, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, 50, Infinity, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, 50, Infinity, 0, Infinity, 50);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, 50, Infinity, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, 50, Infinity, 0, 100, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, 50, 0, Infinity, 100, 50);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, 50, 0, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, 50, 0, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, 50, 0, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, 50, 0, 0, Infinity, 50);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, 50, 0, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, 50, 0, 0, 100, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, 100, Infinity, 0, 0, 100, 50);
+ctx.drawImage(bitmap, 0, Infinity, 100, Infinity, Infinity, 0, 100, 50);
+ctx.drawImage(bitmap, 0, Infinity, 100, Infinity, Infinity, Infinity, 100, 50);
+ctx.drawImage(bitmap, 0, Infinity, 100, Infinity, Infinity, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, 0, Infinity, 100, Infinity, Infinity, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, 100, Infinity, Infinity, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, 100, Infinity, Infinity, 0, Infinity, 50);
+ctx.drawImage(bitmap, 0, Infinity, 100, Infinity, Infinity, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, 100, Infinity, Infinity, 0, 100, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, 100, Infinity, 0, Infinity, 100, 50);
+ctx.drawImage(bitmap, 0, Infinity, 100, Infinity, 0, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, 0, Infinity, 100, Infinity, 0, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, 100, Infinity, 0, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, 100, Infinity, 0, 0, Infinity, 50);
+ctx.drawImage(bitmap, 0, Infinity, 100, Infinity, 0, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, 100, Infinity, 0, 0, 100, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, 100, 50, Infinity, 0, 100, 50);
+ctx.drawImage(bitmap, 0, Infinity, 100, 50, Infinity, Infinity, 100, 50);
+ctx.drawImage(bitmap, 0, Infinity, 100, 50, Infinity, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, 0, Infinity, 100, 50, Infinity, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, 100, 50, Infinity, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, 100, 50, Infinity, 0, Infinity, 50);
+ctx.drawImage(bitmap, 0, Infinity, 100, 50, Infinity, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, 100, 50, Infinity, 0, 100, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, 100, 50, 0, Infinity, 100, 50);
+ctx.drawImage(bitmap, 0, Infinity, 100, 50, 0, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, 0, Infinity, 100, 50, 0, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, 100, 50, 0, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, 100, 50, 0, 0, Infinity, 50);
+ctx.drawImage(bitmap, 0, Infinity, 100, 50, 0, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, 100, 50, 0, 0, 100, Infinity);
+ctx.drawImage(bitmap, 0, 0, Infinity, Infinity, 0, 0, 100, 50);
+ctx.drawImage(bitmap, 0, 0, Infinity, Infinity, Infinity, 0, 100, 50);
+ctx.drawImage(bitmap, 0, 0, Infinity, Infinity, Infinity, Infinity, 100, 50);
+ctx.drawImage(bitmap, 0, 0, Infinity, Infinity, Infinity, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, 0, 0, Infinity, Infinity, Infinity, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, 0, Infinity, Infinity, Infinity, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, 0, 0, Infinity, Infinity, Infinity, 0, Infinity, 50);
+ctx.drawImage(bitmap, 0, 0, Infinity, Infinity, Infinity, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, 0, Infinity, Infinity, Infinity, 0, 100, Infinity);
+ctx.drawImage(bitmap, 0, 0, Infinity, Infinity, 0, Infinity, 100, 50);
+ctx.drawImage(bitmap, 0, 0, Infinity, Infinity, 0, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, 0, 0, Infinity, Infinity, 0, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, 0, Infinity, Infinity, 0, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, 0, 0, Infinity, Infinity, 0, 0, Infinity, 50);
+ctx.drawImage(bitmap, 0, 0, Infinity, Infinity, 0, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, 0, Infinity, Infinity, 0, 0, 100, Infinity);
+ctx.drawImage(bitmap, 0, 0, Infinity, 50, Infinity, 0, 100, 50);
+ctx.drawImage(bitmap, 0, 0, Infinity, 50, Infinity, Infinity, 100, 50);
+ctx.drawImage(bitmap, 0, 0, Infinity, 50, Infinity, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, 0, 0, Infinity, 50, Infinity, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, 0, Infinity, 50, Infinity, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, 0, 0, Infinity, 50, Infinity, 0, Infinity, 50);
+ctx.drawImage(bitmap, 0, 0, Infinity, 50, Infinity, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, 0, Infinity, 50, Infinity, 0, 100, Infinity);
+ctx.drawImage(bitmap, 0, 0, Infinity, 50, 0, Infinity, 100, 50);
+ctx.drawImage(bitmap, 0, 0, Infinity, 50, 0, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, 0, 0, Infinity, 50, 0, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, 0, Infinity, 50, 0, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, 0, 0, Infinity, 50, 0, 0, Infinity, 50);
+ctx.drawImage(bitmap, 0, 0, Infinity, 50, 0, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, 0, Infinity, 50, 0, 0, 100, Infinity);
+ctx.drawImage(bitmap, 0, 0, 100, Infinity, Infinity, 0, 100, 50);
+ctx.drawImage(bitmap, 0, 0, 100, Infinity, Infinity, Infinity, 100, 50);
+ctx.drawImage(bitmap, 0, 0, 100, Infinity, Infinity, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, 0, 0, 100, Infinity, Infinity, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, 0, 100, Infinity, Infinity, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, 0, 0, 100, Infinity, Infinity, 0, Infinity, 50);
+ctx.drawImage(bitmap, 0, 0, 100, Infinity, Infinity, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, 0, 100, Infinity, Infinity, 0, 100, Infinity);
+ctx.drawImage(bitmap, 0, 0, 100, Infinity, 0, Infinity, 100, 50);
+ctx.drawImage(bitmap, 0, 0, 100, Infinity, 0, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, 0, 0, 100, Infinity, 0, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, 0, 100, Infinity, 0, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, 0, 0, 100, Infinity, 0, 0, Infinity, 50);
+ctx.drawImage(bitmap, 0, 0, 100, Infinity, 0, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, 0, 100, Infinity, 0, 0, 100, Infinity);
+ctx.drawImage(bitmap, 0, 0, 100, 50, Infinity, Infinity, 100, 50);
+ctx.drawImage(bitmap, 0, 0, 100, 50, Infinity, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, 0, 0, 100, 50, Infinity, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, 0, 100, 50, Infinity, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, 0, 0, 100, 50, Infinity, 0, Infinity, 50);
+ctx.drawImage(bitmap, 0, 0, 100, 50, Infinity, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, 0, 100, 50, Infinity, 0, 100, Infinity);
+ctx.drawImage(bitmap, 0, 0, 100, 50, 0, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, 0, 0, 100, 50, 0, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, 0, 100, 50, 0, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, 0, 0, 100, 50, 0, 0, Infinity, Infinity);
+ _assertPixel(canvas, 50,25, 0,255,0,255);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.nowrap.html b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.nowrap.html
new file mode 100644
index 0000000000..6ec22c45d6
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.nowrap.html
@@ -0,0 +1,45 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.drawImage.nowrap</title>
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.drawImage.nowrap</h1>
+<p class="desc">Stretched images do not get pixels wrapping around the edges</p>
+
+
+<script>
+var t = async_test("Stretched images do not get pixels wrapping around the edges");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/redtransparent.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, -1950, 0, 2000, 50);
+ _assertPixelApprox(canvas, 45,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 55,25, 0,255,0,255, 2);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.nowrap.worker.js b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.nowrap.worker.js
new file mode 100644
index 0000000000..ab3a9367dd
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.nowrap.worker.js
@@ -0,0 +1,41 @@
+// META: timeout=long
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.drawImage.nowrap
+// Description:Stretched images do not get pixels wrapping around the edges
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Stretched images do not get pixels wrapping around the edges");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/redtransparent.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, -1950, 0, 2000, 50);
+ _assertPixelApprox(canvas, 45,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 55,25, 0,255,0,255, 2);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.null.html b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.null.html
new file mode 100644
index 0000000000..c32d836ce4
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.null.html
@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.drawImage.null</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.drawImage.null</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_js(TypeError, function() { ctx.drawImage(null, 0, 0); });
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.null.worker.js b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.null.worker.js
new file mode 100644
index 0000000000..792dc6ef41
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.null.worker.js
@@ -0,0 +1,23 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.drawImage.null
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_js(TypeError, function() { ctx.drawImage(null, 0, 0); });
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.path.html b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.path.html
new file mode 100644
index 0000000000..b6bad65df5
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.path.html
@@ -0,0 +1,44 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.drawImage.path</title>
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.drawImage.path</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.rect(0, 0, 100, 50);
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/red.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 0, 0);
+ ctx.fill();
+ _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.path.worker.js b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.path.worker.js
new file mode 100644
index 0000000000..5521290977
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.path.worker.js
@@ -0,0 +1,40 @@
+// META: timeout=long
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.drawImage.path
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.rect(0, 0, 100, 50);
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/red.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 0, 0);
+ ctx.fill();
+ _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.self.1.html b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.self.1.html
new file mode 100644
index 0000000000..38857453a4
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.self.1.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.drawImage.self.1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.drawImage.self.1</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 50, 50);
+ctx.fillStyle = '#f00';
+ctx.fillRect(50, 0, 50, 50);
+ctx.drawImage(canvas, 50, 0);
+
+_assertPixelApprox(canvas, 0,0, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 99,0, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 0,49, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 99,49, 0,255,0,255, 2);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.self.1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.self.1.worker.js
new file mode 100644
index 0000000000..01d47cb334
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.self.1.worker.js
@@ -0,0 +1,32 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.drawImage.self.1
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 50, 50);
+ctx.fillStyle = '#f00';
+ctx.fillRect(50, 0, 50, 50);
+ctx.drawImage(canvas, 50, 0);
+
+_assertPixelApprox(canvas, 0,0, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 99,0, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 0,49, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 99,49, 0,255,0,255, 2);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.self.2.html b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.self.2.html
new file mode 100644
index 0000000000..74d383f7e3
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.self.2.html
@@ -0,0 +1,38 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.drawImage.self.2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.drawImage.self.2</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 1, 100, 49);
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 1);
+ctx.drawImage(canvas, 0, 1);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 2);
+
+_assertPixelApprox(canvas, 0,0, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 99,0, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 0,49, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 99,49, 0,255,0,255, 2);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.self.2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.self.2.worker.js
new file mode 100644
index 0000000000..61a02c87a6
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.self.2.worker.js
@@ -0,0 +1,34 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.drawImage.self.2
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 1, 100, 49);
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 1);
+ctx.drawImage(canvas, 0, 1);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 2);
+
+_assertPixelApprox(canvas, 0,0, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 99,0, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 0,49, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 99,49, 0,255,0,255, 2);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.svg.html b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.svg.html
new file mode 100644
index 0000000000..d275bf9567
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.svg.html
@@ -0,0 +1,41 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.drawImage.svg</title>
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.drawImage.svg</h1>
+<p class="desc">drawImage() of an SVG image</p>
+
+
+<script>
+var t = async_test("drawImage() of an SVG image");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/green.svg');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 0, 0);
+ _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.svg.worker.js b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.svg.worker.js
new file mode 100644
index 0000000000..2d832be363
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.svg.worker.js
@@ -0,0 +1,37 @@
+// META: timeout=long
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.drawImage.svg
+// Description:drawImage() of an SVG image
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("drawImage() of an SVG image");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/green.svg');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 0, 0);
+ _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.transform.html b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.transform.html
new file mode 100644
index 0000000000..741c5efb9f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.transform.html
@@ -0,0 +1,44 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.drawImage.transform</title>
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.drawImage.transform</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.translate(100, 0);
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/red.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 0, 0);
+ _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.transform.worker.js b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.transform.worker.js
new file mode 100644
index 0000000000..2fc0caf1c3
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.transform.worker.js
@@ -0,0 +1,40 @@
+// META: timeout=long
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.drawImage.transform
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.translate(100, 0);
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/red.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 0, 0);
+ _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.wrongtype.html b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.wrongtype.html
new file mode 100644
index 0000000000..84cfaef1a7
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.wrongtype.html
@@ -0,0 +1,29 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.drawImage.wrongtype</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.drawImage.wrongtype</h1>
+<p class="desc">Incorrect image types in drawImage do not match any defined overloads, so WebIDL throws a TypeError</p>
+
+
+<script>
+var t = async_test("Incorrect image types in drawImage do not match any defined overloads, so WebIDL throws a TypeError");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_js(TypeError, function() { ctx.drawImage(undefined, 0, 0); });
+assert_throws_js(TypeError, function() { ctx.drawImage(0, 0, 0); });
+assert_throws_js(TypeError, function() { ctx.drawImage("", 0, 0); });
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.wrongtype.worker.js b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.wrongtype.worker.js
new file mode 100644
index 0000000000..9a52628c61
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.wrongtype.worker.js
@@ -0,0 +1,25 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.drawImage.wrongtype
+// Description:Incorrect image types in drawImage do not match any defined overloads, so WebIDL throws a TypeError
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Incorrect image types in drawImage do not match any defined overloads, so WebIDL throws a TypeError");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_js(TypeError, function() { ctx.drawImage(undefined, 0, 0); });
+assert_throws_js(TypeError, function() { ctx.drawImage(0, 0, 0); });
+assert_throws_js(TypeError, function() { ctx.drawImage("", 0, 0); });
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerocanvas.html b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerocanvas.html
new file mode 100644
index 0000000000..9d59ba70bc
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerocanvas.html
@@ -0,0 +1,37 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.drawImage.zerocanvas</title>
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.drawImage.zerocanvas</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var offscreenCanvas2 = new OffscreenCanvas(0, 10);
+assert_throws_dom("INVALID_STATE_ERR", function() { ctx.drawImage(offscreenCanvas2, 0, 0); });
+
+offscreenCanvas2.width = 10;
+offscreenCanvas2.height = 0;
+assert_throws_dom("INVALID_STATE_ERR", function() { ctx.drawImage(offscreenCanvas2, 0, 0); });
+
+offscreenCanvas2.width = 0;
+offscreenCanvas2.height = 0;
+assert_throws_dom("INVALID_STATE_ERR", function() { ctx.drawImage(offscreenCanvas2, 0, 0); });
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerocanvas.worker.js b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerocanvas.worker.js
new file mode 100644
index 0000000000..5f3764b157
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerocanvas.worker.js
@@ -0,0 +1,33 @@
+// META: timeout=long
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.drawImage.zerocanvas
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var offscreenCanvas2 = new OffscreenCanvas(0, 10);
+assert_throws_dom("INVALID_STATE_ERR", function() { ctx.drawImage(offscreenCanvas2, 0, 0); });
+
+offscreenCanvas2.width = 10;
+offscreenCanvas2.height = 0;
+assert_throws_dom("INVALID_STATE_ERR", function() { ctx.drawImage(offscreenCanvas2, 0, 0); });
+
+offscreenCanvas2.width = 0;
+offscreenCanvas2.height = 0;
+assert_throws_dom("INVALID_STATE_ERR", function() { ctx.drawImage(offscreenCanvas2, 0, 0); });
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.html b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.html
new file mode 100644
index 0000000000..cc610399db
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.html
@@ -0,0 +1,45 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.drawImage.zerosource</title>
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.drawImage.zerosource</h1>
+<p class="desc">drawImage with zero-sized source rectangle draws nothing without exception</p>
+
+
+<script>
+var t = async_test("drawImage with zero-sized source rectangle draws nothing without exception");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/green.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 10, 10, 0, 1, 0, 0, 100, 50);
+ ctx.drawImage(bitmap, 10, 10, 1, 0, 0, 0, 100, 50);
+ ctx.drawImage(bitmap, 10, 10, 0, 0, 0, 0, 100, 50);
+ _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.image.html b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.image.html
new file mode 100644
index 0000000000..d79f821d44
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.image.html
@@ -0,0 +1,45 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.drawImage.zerosource.image</title>
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.drawImage.zerosource.image</h1>
+<p class="desc">drawImage with zero-sized source rectangle from image draws nothing without exception</p>
+
+
+<script>
+var t = async_test("drawImage with zero-sized source rectangle from image draws nothing without exception");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/red-zerowidth.svg');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 0, 0, 100, 50);
+ ctx.drawImage(bitmap, 0, 0, 100, 50);
+ ctx.drawImage(bitmap, 0, 0, 100, 50);
+ _assertPixel(canvas, 50,25, 0,255,0,255);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.image.worker.js b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.image.worker.js
new file mode 100644
index 0000000000..1465d6c1bc
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.image.worker.js
@@ -0,0 +1,41 @@
+// META: timeout=long
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.drawImage.zerosource.image
+// Description:drawImage with zero-sized source rectangle from image draws nothing without exception
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("drawImage with zero-sized source rectangle from image draws nothing without exception");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/red-zerowidth.svg');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 0, 0, 100, 50);
+ ctx.drawImage(bitmap, 0, 0, 100, 50);
+ ctx.drawImage(bitmap, 0, 0, 100, 50);
+ _assertPixel(canvas, 50,25, 0,255,0,255);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.worker.js b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.worker.js
new file mode 100644
index 0000000000..654e9bdd74
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.worker.js
@@ -0,0 +1,41 @@
+// META: timeout=long
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.drawImage.zerosource
+// Description:drawImage with zero-sized source rectangle draws nothing without exception
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("drawImage with zero-sized source rectangle draws nothing without exception");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/green.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 10, 10, 0, 1, 0, 0, 100, 50);
+ ctx.drawImage(bitmap, 10, 10, 1, 0, 0, 0, 100, 50);
+ ctx.drawImage(bitmap, 10, 10, 0, 0, 0, 0, 100, 50);
+ _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.clearRect.basic.html b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.clearRect.basic.html
new file mode 100644
index 0000000000..846b264ee8
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.clearRect.basic.html
@@ -0,0 +1,30 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.clearRect.basic</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.clearRect.basic</h1>
+<p class="desc">clearRect clears to transparent black</p>
+
+
+<script>
+var t = async_test("clearRect clears to transparent black");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.clearRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,0,0,0);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.clearRect.basic.worker.js b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.clearRect.basic.worker.js
new file mode 100644
index 0000000000..5908ecca85
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.clearRect.basic.worker.js
@@ -0,0 +1,26 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.clearRect.basic
+// Description:clearRect clears to transparent black
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("clearRect clears to transparent black");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.clearRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,0,0,0);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.clearRect.clip.html b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.clearRect.clip.html
new file mode 100644
index 0000000000..eb3de8b591
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.clearRect.clip.html
@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.clearRect.clip</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.clearRect.clip</h1>
+<p class="desc">clearRect is affected by clipping regions</p>
+
+
+<script>
+var t = async_test("clearRect is affected by clipping regions");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.beginPath();
+ctx.rect(0, 0, 16, 16);
+ctx.clip();
+ctx.clearRect(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 16, 16);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.clearRect.clip.worker.js b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.clearRect.clip.worker.js
new file mode 100644
index 0000000000..7fb5791cc9
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.clearRect.clip.worker.js
@@ -0,0 +1,31 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.clearRect.clip
+// Description:clearRect is affected by clipping regions
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("clearRect is affected by clipping regions");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.beginPath();
+ctx.rect(0, 0, 16, 16);
+ctx.clip();
+ctx.clearRect(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 16, 16);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.clearRect.globalalpha.html b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.clearRect.globalalpha.html
new file mode 100644
index 0000000000..c1a3463d31
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.clearRect.globalalpha.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.clearRect.globalalpha</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.clearRect.globalalpha</h1>
+<p class="desc">clearRect is not affected by globalAlpha</p>
+
+
+<script>
+var t = async_test("clearRect is not affected by globalAlpha");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalAlpha = 0.1;
+ctx.clearRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,0,0,0);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.clearRect.globalalpha.worker.js b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.clearRect.globalalpha.worker.js
new file mode 100644
index 0000000000..885e389ba5
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.clearRect.globalalpha.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.clearRect.globalalpha
+// Description:clearRect is not affected by globalAlpha
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("clearRect is not affected by globalAlpha");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalAlpha = 0.1;
+ctx.clearRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,0,0,0);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.clearRect.globalcomposite.html b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.clearRect.globalcomposite.html
new file mode 100644
index 0000000000..a77f67a4ba
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.clearRect.globalcomposite.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.clearRect.globalcomposite</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.clearRect.globalcomposite</h1>
+<p class="desc">clearRect is not affected by globalCompositeOperation</p>
+
+
+<script>
+var t = async_test("clearRect is not affected by globalCompositeOperation");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'destination-atop';
+ctx.clearRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,0,0,0);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.clearRect.globalcomposite.worker.js b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.clearRect.globalcomposite.worker.js
new file mode 100644
index 0000000000..a31962f73e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.clearRect.globalcomposite.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.clearRect.globalcomposite
+// Description:clearRect is not affected by globalCompositeOperation
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("clearRect is not affected by globalCompositeOperation");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'destination-atop';
+ctx.clearRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,0,0,0);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.clearRect.negative.html b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.clearRect.negative.html
new file mode 100644
index 0000000000..158294ab3e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.clearRect.negative.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.clearRect.negative</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.clearRect.negative</h1>
+<p class="desc">clearRect of negative sizes works</p>
+
+
+<script>
+var t = async_test("clearRect of negative sizes works");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.clearRect(0, 0, 50, 25);
+ctx.clearRect(100, 0, -50, 25);
+ctx.clearRect(0, 50, 50, -25);
+ctx.clearRect(100, 50, -50, -25);
+_assertPixel(canvas, 25,12, 0,0,0,0);
+_assertPixel(canvas, 75,12, 0,0,0,0);
+_assertPixel(canvas, 25,37, 0,0,0,0);
+_assertPixel(canvas, 75,37, 0,0,0,0);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.clearRect.negative.worker.js b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.clearRect.negative.worker.js
new file mode 100644
index 0000000000..c7390550b8
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.clearRect.negative.worker.js
@@ -0,0 +1,32 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.clearRect.negative
+// Description:clearRect of negative sizes works
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("clearRect of negative sizes works");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.clearRect(0, 0, 50, 25);
+ctx.clearRect(100, 0, -50, 25);
+ctx.clearRect(0, 50, 50, -25);
+ctx.clearRect(100, 50, -50, -25);
+_assertPixel(canvas, 25,12, 0,0,0,0);
+_assertPixel(canvas, 75,12, 0,0,0,0);
+_assertPixel(canvas, 25,37, 0,0,0,0);
+_assertPixel(canvas, 75,37, 0,0,0,0);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.clearRect.nonfinite.html b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.clearRect.nonfinite.html
new file mode 100644
index 0000000000..4d3037b26b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.clearRect.nonfinite.html
@@ -0,0 +1,52 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.clearRect.nonfinite</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.clearRect.nonfinite</h1>
+<p class="desc">clearRect() with Infinity/NaN is ignored</p>
+
+
+<script>
+var t = async_test("clearRect() with Infinity/NaN is ignored");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.clearRect(Infinity, 0, 100, 50);
+ctx.clearRect(-Infinity, 0, 100, 50);
+ctx.clearRect(NaN, 0, 100, 50);
+ctx.clearRect(0, Infinity, 100, 50);
+ctx.clearRect(0, -Infinity, 100, 50);
+ctx.clearRect(0, NaN, 100, 50);
+ctx.clearRect(0, 0, Infinity, 50);
+ctx.clearRect(0, 0, -Infinity, 50);
+ctx.clearRect(0, 0, NaN, 50);
+ctx.clearRect(0, 0, 100, Infinity);
+ctx.clearRect(0, 0, 100, -Infinity);
+ctx.clearRect(0, 0, 100, NaN);
+ctx.clearRect(Infinity, Infinity, 100, 50);
+ctx.clearRect(Infinity, Infinity, Infinity, 50);
+ctx.clearRect(Infinity, Infinity, Infinity, Infinity);
+ctx.clearRect(Infinity, Infinity, 100, Infinity);
+ctx.clearRect(Infinity, 0, Infinity, 50);
+ctx.clearRect(Infinity, 0, Infinity, Infinity);
+ctx.clearRect(Infinity, 0, 100, Infinity);
+ctx.clearRect(0, Infinity, Infinity, 50);
+ctx.clearRect(0, Infinity, Infinity, Infinity);
+ctx.clearRect(0, Infinity, 100, Infinity);
+ctx.clearRect(0, 0, Infinity, Infinity);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.clearRect.nonfinite.worker.js b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.clearRect.nonfinite.worker.js
new file mode 100644
index 0000000000..e4dc952200
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.clearRect.nonfinite.worker.js
@@ -0,0 +1,48 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.clearRect.nonfinite
+// Description:clearRect() with Infinity/NaN is ignored
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("clearRect() with Infinity/NaN is ignored");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.clearRect(Infinity, 0, 100, 50);
+ctx.clearRect(-Infinity, 0, 100, 50);
+ctx.clearRect(NaN, 0, 100, 50);
+ctx.clearRect(0, Infinity, 100, 50);
+ctx.clearRect(0, -Infinity, 100, 50);
+ctx.clearRect(0, NaN, 100, 50);
+ctx.clearRect(0, 0, Infinity, 50);
+ctx.clearRect(0, 0, -Infinity, 50);
+ctx.clearRect(0, 0, NaN, 50);
+ctx.clearRect(0, 0, 100, Infinity);
+ctx.clearRect(0, 0, 100, -Infinity);
+ctx.clearRect(0, 0, 100, NaN);
+ctx.clearRect(Infinity, Infinity, 100, 50);
+ctx.clearRect(Infinity, Infinity, Infinity, 50);
+ctx.clearRect(Infinity, Infinity, Infinity, Infinity);
+ctx.clearRect(Infinity, Infinity, 100, Infinity);
+ctx.clearRect(Infinity, 0, Infinity, 50);
+ctx.clearRect(Infinity, 0, Infinity, Infinity);
+ctx.clearRect(Infinity, 0, 100, Infinity);
+ctx.clearRect(0, Infinity, Infinity, 50);
+ctx.clearRect(0, Infinity, Infinity, Infinity);
+ctx.clearRect(0, Infinity, 100, Infinity);
+ctx.clearRect(0, 0, Infinity, Infinity);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.clearRect.path.html b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.clearRect.path.html
new file mode 100644
index 0000000000..ab813b1e9b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.clearRect.path.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.clearRect.path</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.clearRect.path</h1>
+<p class="desc">clearRect does not affect the current path</p>
+
+
+<script>
+var t = async_test("clearRect does not affect the current path");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.beginPath();
+ctx.rect(0, 0, 100, 50);
+ctx.clearRect(0, 0, 16, 16);
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.clearRect.path.worker.js b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.clearRect.path.worker.js
new file mode 100644
index 0000000000..eee973df5a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.clearRect.path.worker.js
@@ -0,0 +1,28 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.clearRect.path
+// Description:clearRect does not affect the current path
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("clearRect does not affect the current path");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.beginPath();
+ctx.rect(0, 0, 100, 50);
+ctx.clearRect(0, 0, 16, 16);
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.clearRect.shadow.html b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.clearRect.shadow.html
new file mode 100644
index 0000000000..050591d620
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.clearRect.shadow.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.clearRect.shadow</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.clearRect.shadow</h1>
+<p class="desc">clearRect does not draw shadows</p>
+
+
+<script>
+var t = async_test("clearRect does not draw shadows");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.shadowColor = '#f00';
+ctx.shadowBlur = 0;
+ctx.shadowOffsetX = 0;
+ctx.shadowOffsetY = 50;
+ctx.clearRect(0, -50, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.clearRect.shadow.worker.js b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.clearRect.shadow.worker.js
new file mode 100644
index 0000000000..74ac17c1d2
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.clearRect.shadow.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.clearRect.shadow
+// Description:clearRect does not draw shadows
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("clearRect does not draw shadows");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.shadowColor = '#f00';
+ctx.shadowBlur = 0;
+ctx.shadowOffsetX = 0;
+ctx.shadowOffsetY = 50;
+ctx.clearRect(0, -50, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.clearRect.transform.html b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.clearRect.transform.html
new file mode 100644
index 0000000000..cca3c4d32b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.clearRect.transform.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.clearRect.transform</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.clearRect.transform</h1>
+<p class="desc">clearRect is affected by transforms</p>
+
+
+<script>
+var t = async_test("clearRect is affected by transforms");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.scale(10, 10);
+ctx.translate(0, 5);
+ctx.clearRect(0, -5, 10, 5);
+_assertPixel(canvas, 50,25, 0,0,0,0);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.clearRect.transform.worker.js b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.clearRect.transform.worker.js
new file mode 100644
index 0000000000..8b76d4e0ae
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.clearRect.transform.worker.js
@@ -0,0 +1,28 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.clearRect.transform
+// Description:clearRect is affected by transforms
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("clearRect is affected by transforms");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.scale(10, 10);
+ctx.translate(0, 5);
+ctx.clearRect(0, -5, 10, 5);
+_assertPixel(canvas, 50,25, 0,0,0,0);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.clearRect.zero.html b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.clearRect.zero.html
new file mode 100644
index 0000000000..69bbb5ecc7
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.clearRect.zero.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.clearRect.zero</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.clearRect.zero</h1>
+<p class="desc">clearRect of zero pixels has no effect</p>
+
+
+<script>
+var t = async_test("clearRect of zero pixels has no effect");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.clearRect(0, 0, 100, 0);
+ctx.clearRect(0, 0, 0, 50);
+ctx.clearRect(0, 0, 0, 0);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.clearRect.zero.worker.js b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.clearRect.zero.worker.js
new file mode 100644
index 0000000000..24c1c4253f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.clearRect.zero.worker.js
@@ -0,0 +1,28 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.clearRect.zero
+// Description:clearRect of zero pixels has no effect
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("clearRect of zero pixels has no effect");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.clearRect(0, 0, 100, 0);
+ctx.clearRect(0, 0, 0, 50);
+ctx.clearRect(0, 0, 0, 0);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.fillRect.basic.html b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.fillRect.basic.html
new file mode 100644
index 0000000000..bad032bb7c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.fillRect.basic.html
@@ -0,0 +1,29 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillRect.basic</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillRect.basic</h1>
+<p class="desc">fillRect works</p>
+
+
+<script>
+var t = async_test("fillRect works");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.fillRect.basic.worker.js b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.fillRect.basic.worker.js
new file mode 100644
index 0000000000..3a42a2a13b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.fillRect.basic.worker.js
@@ -0,0 +1,25 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillRect.basic
+// Description:fillRect works
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("fillRect works");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.fillRect.clip.html b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.fillRect.clip.html
new file mode 100644
index 0000000000..7043c2355b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.fillRect.clip.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillRect.clip</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillRect.clip</h1>
+<p class="desc">fillRect is affected by clipping regions</p>
+
+
+<script>
+var t = async_test("fillRect is affected by clipping regions");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.beginPath();
+ctx.rect(0, 0, 16, 16);
+ctx.clip();
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 16, 16);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.fillRect.clip.worker.js b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.fillRect.clip.worker.js
new file mode 100644
index 0000000000..926821ac96
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.fillRect.clip.worker.js
@@ -0,0 +1,32 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillRect.clip
+// Description:fillRect is affected by clipping regions
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("fillRect is affected by clipping regions");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.beginPath();
+ctx.rect(0, 0, 16, 16);
+ctx.clip();
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 16, 16);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.fillRect.negative.html b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.fillRect.negative.html
new file mode 100644
index 0000000000..880e5700bd
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.fillRect.negative.html
@@ -0,0 +1,37 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillRect.negative</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillRect.negative</h1>
+<p class="desc">fillRect of negative sizes works</p>
+
+
+<script>
+var t = async_test("fillRect of negative sizes works");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 50, 25);
+ctx.fillRect(100, 0, -50, 25);
+ctx.fillRect(0, 50, 50, -25);
+ctx.fillRect(100, 50, -50, -25);
+_assertPixel(canvas, 25,12, 0,255,0,255);
+_assertPixel(canvas, 75,12, 0,255,0,255);
+_assertPixel(canvas, 25,37, 0,255,0,255);
+_assertPixel(canvas, 75,37, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.fillRect.negative.worker.js b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.fillRect.negative.worker.js
new file mode 100644
index 0000000000..b868dec9ff
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.fillRect.negative.worker.js
@@ -0,0 +1,33 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillRect.negative
+// Description:fillRect of negative sizes works
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("fillRect of negative sizes works");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 50, 25);
+ctx.fillRect(100, 0, -50, 25);
+ctx.fillRect(0, 50, 50, -25);
+ctx.fillRect(100, 50, -50, -25);
+_assertPixel(canvas, 25,12, 0,255,0,255);
+_assertPixel(canvas, 75,12, 0,255,0,255);
+_assertPixel(canvas, 25,37, 0,255,0,255);
+_assertPixel(canvas, 75,37, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.fillRect.nonfinite.html b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.fillRect.nonfinite.html
new file mode 100644
index 0000000000..0d545e9f3f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.fillRect.nonfinite.html
@@ -0,0 +1,53 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillRect.nonfinite</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillRect.nonfinite</h1>
+<p class="desc">fillRect() with Infinity/NaN is ignored</p>
+
+
+<script>
+var t = async_test("fillRect() with Infinity/NaN is ignored");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.fillRect(Infinity, 0, 100, 50);
+ctx.fillRect(-Infinity, 0, 100, 50);
+ctx.fillRect(NaN, 0, 100, 50);
+ctx.fillRect(0, Infinity, 100, 50);
+ctx.fillRect(0, -Infinity, 100, 50);
+ctx.fillRect(0, NaN, 100, 50);
+ctx.fillRect(0, 0, Infinity, 50);
+ctx.fillRect(0, 0, -Infinity, 50);
+ctx.fillRect(0, 0, NaN, 50);
+ctx.fillRect(0, 0, 100, Infinity);
+ctx.fillRect(0, 0, 100, -Infinity);
+ctx.fillRect(0, 0, 100, NaN);
+ctx.fillRect(Infinity, Infinity, 100, 50);
+ctx.fillRect(Infinity, Infinity, Infinity, 50);
+ctx.fillRect(Infinity, Infinity, Infinity, Infinity);
+ctx.fillRect(Infinity, Infinity, 100, Infinity);
+ctx.fillRect(Infinity, 0, Infinity, 50);
+ctx.fillRect(Infinity, 0, Infinity, Infinity);
+ctx.fillRect(Infinity, 0, 100, Infinity);
+ctx.fillRect(0, Infinity, Infinity, 50);
+ctx.fillRect(0, Infinity, Infinity, Infinity);
+ctx.fillRect(0, Infinity, 100, Infinity);
+ctx.fillRect(0, 0, Infinity, Infinity);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.fillRect.nonfinite.worker.js b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.fillRect.nonfinite.worker.js
new file mode 100644
index 0000000000..418250e4bf
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.fillRect.nonfinite.worker.js
@@ -0,0 +1,49 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillRect.nonfinite
+// Description:fillRect() with Infinity/NaN is ignored
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("fillRect() with Infinity/NaN is ignored");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.fillRect(Infinity, 0, 100, 50);
+ctx.fillRect(-Infinity, 0, 100, 50);
+ctx.fillRect(NaN, 0, 100, 50);
+ctx.fillRect(0, Infinity, 100, 50);
+ctx.fillRect(0, -Infinity, 100, 50);
+ctx.fillRect(0, NaN, 100, 50);
+ctx.fillRect(0, 0, Infinity, 50);
+ctx.fillRect(0, 0, -Infinity, 50);
+ctx.fillRect(0, 0, NaN, 50);
+ctx.fillRect(0, 0, 100, Infinity);
+ctx.fillRect(0, 0, 100, -Infinity);
+ctx.fillRect(0, 0, 100, NaN);
+ctx.fillRect(Infinity, Infinity, 100, 50);
+ctx.fillRect(Infinity, Infinity, Infinity, 50);
+ctx.fillRect(Infinity, Infinity, Infinity, Infinity);
+ctx.fillRect(Infinity, Infinity, 100, Infinity);
+ctx.fillRect(Infinity, 0, Infinity, 50);
+ctx.fillRect(Infinity, 0, Infinity, Infinity);
+ctx.fillRect(Infinity, 0, 100, Infinity);
+ctx.fillRect(0, Infinity, Infinity, 50);
+ctx.fillRect(0, Infinity, Infinity, Infinity);
+ctx.fillRect(0, Infinity, 100, Infinity);
+ctx.fillRect(0, 0, Infinity, Infinity);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.fillRect.path.html b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.fillRect.path.html
new file mode 100644
index 0000000000..13974b7e2a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.fillRect.path.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillRect.path</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillRect.path</h1>
+<p class="desc">fillRect does not affect the current path</p>
+
+
+<script>
+var t = async_test("fillRect does not affect the current path");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.beginPath();
+ctx.rect(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 16, 16);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.fillRect.path.worker.js b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.fillRect.path.worker.js
new file mode 100644
index 0000000000..0200fc568e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.fillRect.path.worker.js
@@ -0,0 +1,29 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillRect.path
+// Description:fillRect does not affect the current path
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("fillRect does not affect the current path");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.beginPath();
+ctx.rect(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 16, 16);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.fillRect.shadow.html b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.fillRect.shadow.html
new file mode 100644
index 0000000000..f3b015f25a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.fillRect.shadow.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillRect.shadow</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillRect.shadow</h1>
+<p class="desc">fillRect draws shadows</p>
+
+
+<script>
+var t = async_test("fillRect draws shadows");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.shadowColor = '#0f0';
+ctx.shadowBlur = 0;
+ctx.shadowOffsetX = 0;
+ctx.shadowOffsetY = 50;
+ctx.fillRect(0, -50, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.fillRect.shadow.worker.js b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.fillRect.shadow.worker.js
new file mode 100644
index 0000000000..dea83df9aa
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.fillRect.shadow.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillRect.shadow
+// Description:fillRect draws shadows
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("fillRect draws shadows");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.shadowColor = '#0f0';
+ctx.shadowBlur = 0;
+ctx.shadowOffsetX = 0;
+ctx.shadowOffsetY = 50;
+ctx.fillRect(0, -50, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.fillRect.transform.html b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.fillRect.transform.html
new file mode 100644
index 0000000000..081ac763bd
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.fillRect.transform.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillRect.transform</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillRect.transform</h1>
+<p class="desc">fillRect is affected by transforms</p>
+
+
+<script>
+var t = async_test("fillRect is affected by transforms");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.scale(10, 10);
+ctx.translate(0, 5);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, -5, 10, 5);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.fillRect.transform.worker.js b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.fillRect.transform.worker.js
new file mode 100644
index 0000000000..8d0cb83c1b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.fillRect.transform.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillRect.transform
+// Description:fillRect is affected by transforms
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("fillRect is affected by transforms");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.scale(10, 10);
+ctx.translate(0, 5);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, -5, 10, 5);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.fillRect.zero.html b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.fillRect.zero.html
new file mode 100644
index 0000000000..3f015475d5
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.fillRect.zero.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillRect.zero</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillRect.zero</h1>
+<p class="desc">fillRect of zero pixels has no effect</p>
+
+
+<script>
+var t = async_test("fillRect of zero pixels has no effect");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 0);
+ctx.fillRect(0, 0, 0, 50);
+ctx.fillRect(0, 0, 0, 0);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.fillRect.zero.worker.js b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.fillRect.zero.worker.js
new file mode 100644
index 0000000000..48ee67ae74
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.fillRect.zero.worker.js
@@ -0,0 +1,29 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillRect.zero
+// Description:fillRect of zero pixels has no effect
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("fillRect of zero pixels has no effect");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 0);
+ctx.fillRect(0, 0, 0, 50);
+ctx.fillRect(0, 0, 0, 0);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.basic.html b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.basic.html
new file mode 100644
index 0000000000..caee5d6735
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.basic.html
@@ -0,0 +1,30 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.strokeRect.basic</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.strokeRect.basic</h1>
+<p class="desc">strokeRect works</p>
+
+
+<script>
+var t = async_test("strokeRect works");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 50;
+ctx.strokeRect(25, 24, 50, 2);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.basic.worker.js b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.basic.worker.js
new file mode 100644
index 0000000000..304fc5ba84
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.basic.worker.js
@@ -0,0 +1,26 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.strokeRect.basic
+// Description:strokeRect works
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("strokeRect works");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 50;
+ctx.strokeRect(25, 24, 50, 2);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.clip.html b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.clip.html
new file mode 100644
index 0000000000..3aa5d0392e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.clip.html
@@ -0,0 +1,37 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.strokeRect.clip</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.strokeRect.clip</h1>
+<p class="desc">strokeRect is affected by clipping regions</p>
+
+
+<script>
+var t = async_test("strokeRect is affected by clipping regions");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.beginPath();
+ctx.rect(0, 0, 16, 16);
+ctx.clip();
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 50;
+ctx.strokeRect(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 16, 16);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.clip.worker.js b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.clip.worker.js
new file mode 100644
index 0000000000..d5a50443d3
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.clip.worker.js
@@ -0,0 +1,33 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.strokeRect.clip
+// Description:strokeRect is affected by clipping regions
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("strokeRect is affected by clipping regions");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.beginPath();
+ctx.rect(0, 0, 16, 16);
+ctx.clip();
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 50;
+ctx.strokeRect(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 16, 16);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.globalalpha.html b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.globalalpha.html
new file mode 100644
index 0000000000..a470939455
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.globalalpha.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.strokeRect.globalalpha</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.strokeRect.globalalpha</h1>
+<p class="desc">strokeRect is affected by globalAlpha</p>
+
+
+<script>
+var t = async_test("strokeRect is affected by globalAlpha");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.globalAlpha = 0;
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 50;
+ctx.strokeRect(25, 24, 50, 2);
+_assertPixel(canvas, 50,25, 0,0,0,0);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.globalalpha.worker.js b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.globalalpha.worker.js
new file mode 100644
index 0000000000..2556f65668
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.globalalpha.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.strokeRect.globalalpha
+// Description:strokeRect is affected by globalAlpha
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("strokeRect is affected by globalAlpha");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.globalAlpha = 0;
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 50;
+ctx.strokeRect(25, 24, 50, 2);
+_assertPixel(canvas, 50,25, 0,0,0,0);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.globalcomposite.html b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.globalcomposite.html
new file mode 100644
index 0000000000..bfca74c48a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.globalcomposite.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.strokeRect.globalcomposite</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.strokeRect.globalcomposite</h1>
+<p class="desc">strokeRect is not affected by globalCompositeOperation</p>
+
+
+<script>
+var t = async_test("strokeRect is not affected by globalCompositeOperation");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.globalCompositeOperation = 'source-in';
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 50;
+ctx.strokeRect(25, 24, 50, 2);
+_assertPixel(canvas, 50,25, 0,0,0,0);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.globalcomposite.worker.js b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.globalcomposite.worker.js
new file mode 100644
index 0000000000..7c9859c7fb
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.globalcomposite.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.strokeRect.globalcomposite
+// Description:strokeRect is not affected by globalCompositeOperation
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("strokeRect is not affected by globalCompositeOperation");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.globalCompositeOperation = 'source-in';
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 50;
+ctx.strokeRect(25, 24, 50, 2);
+_assertPixel(canvas, 50,25, 0,0,0,0);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.negative.html b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.negative.html
new file mode 100644
index 0000000000..04f33b184c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.negative.html
@@ -0,0 +1,38 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.strokeRect.negative</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.strokeRect.negative</h1>
+<p class="desc">strokeRect of negative sizes works</p>
+
+
+<script>
+var t = async_test("strokeRect of negative sizes works");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 25;
+ctx.strokeRect(12, 12, 26, 1);
+ctx.strokeRect(88, 12, -26, 1);
+ctx.strokeRect(12, 38, 26, -1);
+ctx.strokeRect(88, 38, -26, -1);
+_assertPixel(canvas, 25,12, 0,255,0,255);
+_assertPixel(canvas, 75,12, 0,255,0,255);
+_assertPixel(canvas, 25,37, 0,255,0,255);
+_assertPixel(canvas, 75,37, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.negative.worker.js b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.negative.worker.js
new file mode 100644
index 0000000000..c80a44680c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.negative.worker.js
@@ -0,0 +1,34 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.strokeRect.negative
+// Description:strokeRect of negative sizes works
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("strokeRect of negative sizes works");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 25;
+ctx.strokeRect(12, 12, 26, 1);
+ctx.strokeRect(88, 12, -26, 1);
+ctx.strokeRect(12, 38, 26, -1);
+ctx.strokeRect(88, 38, -26, -1);
+_assertPixel(canvas, 25,12, 0,255,0,255);
+_assertPixel(canvas, 75,12, 0,255,0,255);
+_assertPixel(canvas, 25,37, 0,255,0,255);
+_assertPixel(canvas, 75,37, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.nonfinite.html b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.nonfinite.html
new file mode 100644
index 0000000000..1688912ab8
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.nonfinite.html
@@ -0,0 +1,54 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.strokeRect.nonfinite</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.strokeRect.nonfinite</h1>
+<p class="desc">strokeRect() with Infinity/NaN is ignored</p>
+
+
+<script>
+var t = async_test("strokeRect() with Infinity/NaN is ignored");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 150;
+ctx.strokeRect(Infinity, 0, 100, 50);
+ctx.strokeRect(-Infinity, 0, 100, 50);
+ctx.strokeRect(NaN, 0, 100, 50);
+ctx.strokeRect(0, Infinity, 100, 50);
+ctx.strokeRect(0, -Infinity, 100, 50);
+ctx.strokeRect(0, NaN, 100, 50);
+ctx.strokeRect(0, 0, Infinity, 50);
+ctx.strokeRect(0, 0, -Infinity, 50);
+ctx.strokeRect(0, 0, NaN, 50);
+ctx.strokeRect(0, 0, 100, Infinity);
+ctx.strokeRect(0, 0, 100, -Infinity);
+ctx.strokeRect(0, 0, 100, NaN);
+ctx.strokeRect(Infinity, Infinity, 100, 50);
+ctx.strokeRect(Infinity, Infinity, Infinity, 50);
+ctx.strokeRect(Infinity, Infinity, Infinity, Infinity);
+ctx.strokeRect(Infinity, Infinity, 100, Infinity);
+ctx.strokeRect(Infinity, 0, Infinity, 50);
+ctx.strokeRect(Infinity, 0, Infinity, Infinity);
+ctx.strokeRect(Infinity, 0, 100, Infinity);
+ctx.strokeRect(0, Infinity, Infinity, 50);
+ctx.strokeRect(0, Infinity, Infinity, Infinity);
+ctx.strokeRect(0, Infinity, 100, Infinity);
+ctx.strokeRect(0, 0, Infinity, Infinity);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.nonfinite.worker.js b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.nonfinite.worker.js
new file mode 100644
index 0000000000..4c1bc4c609
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.nonfinite.worker.js
@@ -0,0 +1,50 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.strokeRect.nonfinite
+// Description:strokeRect() with Infinity/NaN is ignored
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("strokeRect() with Infinity/NaN is ignored");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 150;
+ctx.strokeRect(Infinity, 0, 100, 50);
+ctx.strokeRect(-Infinity, 0, 100, 50);
+ctx.strokeRect(NaN, 0, 100, 50);
+ctx.strokeRect(0, Infinity, 100, 50);
+ctx.strokeRect(0, -Infinity, 100, 50);
+ctx.strokeRect(0, NaN, 100, 50);
+ctx.strokeRect(0, 0, Infinity, 50);
+ctx.strokeRect(0, 0, -Infinity, 50);
+ctx.strokeRect(0, 0, NaN, 50);
+ctx.strokeRect(0, 0, 100, Infinity);
+ctx.strokeRect(0, 0, 100, -Infinity);
+ctx.strokeRect(0, 0, 100, NaN);
+ctx.strokeRect(Infinity, Infinity, 100, 50);
+ctx.strokeRect(Infinity, Infinity, Infinity, 50);
+ctx.strokeRect(Infinity, Infinity, Infinity, Infinity);
+ctx.strokeRect(Infinity, Infinity, 100, Infinity);
+ctx.strokeRect(Infinity, 0, Infinity, 50);
+ctx.strokeRect(Infinity, 0, Infinity, Infinity);
+ctx.strokeRect(Infinity, 0, 100, Infinity);
+ctx.strokeRect(0, Infinity, Infinity, 50);
+ctx.strokeRect(0, Infinity, Infinity, Infinity);
+ctx.strokeRect(0, Infinity, 100, Infinity);
+ctx.strokeRect(0, 0, Infinity, Infinity);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.path.html b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.path.html
new file mode 100644
index 0000000000..c3d80bf299
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.path.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.strokeRect.path</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.strokeRect.path</h1>
+<p class="desc">strokeRect does not affect the current path</p>
+
+
+<script>
+var t = async_test("strokeRect does not affect the current path");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.beginPath();
+ctx.rect(0, 0, 100, 50);
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 5;
+ctx.strokeRect(0, 0, 16, 16);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.path.worker.js b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.path.worker.js
new file mode 100644
index 0000000000..436bd03107
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.path.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.strokeRect.path
+// Description:strokeRect does not affect the current path
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("strokeRect does not affect the current path");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.beginPath();
+ctx.rect(0, 0, 100, 50);
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 5;
+ctx.strokeRect(0, 0, 16, 16);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.shadow.html b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.shadow.html
new file mode 100644
index 0000000000..e80d7511d4
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.shadow.html
@@ -0,0 +1,37 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.strokeRect.shadow</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.strokeRect.shadow</h1>
+<p class="desc">strokeRect draws shadows</p>
+
+
+<script>
+var t = async_test("strokeRect draws shadows");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.shadowColor = '#0f0';
+ctx.shadowBlur = 0;
+ctx.shadowOffsetX = 0;
+ctx.shadowOffsetY = 50;
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 50;
+ctx.strokeRect(0, -75, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.shadow.worker.js b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.shadow.worker.js
new file mode 100644
index 0000000000..13beb42ff0
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.shadow.worker.js
@@ -0,0 +1,33 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.strokeRect.shadow
+// Description:strokeRect draws shadows
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("strokeRect draws shadows");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.shadowColor = '#0f0';
+ctx.shadowBlur = 0;
+ctx.shadowOffsetX = 0;
+ctx.shadowOffsetY = 50;
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 50;
+ctx.strokeRect(0, -75, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.transform.html b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.transform.html
new file mode 100644
index 0000000000..2b44d0c627
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.transform.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.strokeRect.transform</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.strokeRect.transform</h1>
+<p class="desc">fillRect is affected by transforms</p>
+
+
+<script>
+var t = async_test("fillRect is affected by transforms");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.scale(10, 10);
+ctx.translate(0, 5);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 5;
+ctx.strokeRect(2.5, -2.6, 5, 0.2);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.transform.worker.js b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.transform.worker.js
new file mode 100644
index 0000000000..5958cf1406
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.transform.worker.js
@@ -0,0 +1,28 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.strokeRect.transform
+// Description:fillRect is affected by transforms
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("fillRect is affected by transforms");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.scale(10, 10);
+ctx.translate(0, 5);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 5;
+ctx.strokeRect(2.5, -2.6, 5, 0.2);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.zero.1.html b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.zero.1.html
new file mode 100644
index 0000000000..fe4d77baaa
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.zero.1.html
@@ -0,0 +1,30 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.strokeRect.zero.1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.strokeRect.zero.1</h1>
+<p class="desc">strokeRect of 0x0 pixels draws nothing</p>
+
+
+<script>
+var t = async_test("strokeRect of 0x0 pixels draws nothing");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 250;
+ctx.strokeRect(50, 25, 0, 0);
+_assertPixel(canvas, 50,25, 0,0,0,0);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.zero.1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.zero.1.worker.js
new file mode 100644
index 0000000000..be3da7c88a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.zero.1.worker.js
@@ -0,0 +1,26 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.strokeRect.zero.1
+// Description:strokeRect of 0x0 pixels draws nothing
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("strokeRect of 0x0 pixels draws nothing");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 250;
+ctx.strokeRect(50, 25, 0, 0);
+_assertPixel(canvas, 50,25, 0,0,0,0);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.zero.2.html b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.zero.2.html
new file mode 100644
index 0000000000..0e234f85e5
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.zero.2.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.strokeRect.zero.2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.strokeRect.zero.2</h1>
+<p class="desc">strokeRect of 0x0 pixels draws nothing, including caps and joins</p>
+
+
+<script>
+var t = async_test("strokeRect of 0x0 pixels draws nothing, including caps and joins");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 250;
+ctx.lineCap = 'round';
+ctx.lineJoin = 'round';
+ctx.strokeRect(50, 25, 0, 0);
+_assertPixel(canvas, 50,25, 0,0,0,0);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.zero.2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.zero.2.worker.js
new file mode 100644
index 0000000000..ab24ad3412
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.zero.2.worker.js
@@ -0,0 +1,28 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.strokeRect.zero.2
+// Description:strokeRect of 0x0 pixels draws nothing, including caps and joins
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("strokeRect of 0x0 pixels draws nothing, including caps and joins");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 250;
+ctx.lineCap = 'round';
+ctx.lineJoin = 'round';
+ctx.strokeRect(50, 25, 0, 0);
+_assertPixel(canvas, 50,25, 0,0,0,0);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.zero.3.html b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.zero.3.html
new file mode 100644
index 0000000000..0145b2e412
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.zero.3.html
@@ -0,0 +1,30 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.strokeRect.zero.3</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.strokeRect.zero.3</h1>
+<p class="desc">strokeRect of Nx0 pixels draws a straight line</p>
+
+
+<script>
+var t = async_test("strokeRect of Nx0 pixels draws a straight line");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 50;
+ctx.strokeRect(0, 25, 100, 0);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.zero.3.worker.js b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.zero.3.worker.js
new file mode 100644
index 0000000000..d9b365f7e8
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.zero.3.worker.js
@@ -0,0 +1,26 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.strokeRect.zero.3
+// Description:strokeRect of Nx0 pixels draws a straight line
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("strokeRect of Nx0 pixels draws a straight line");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 50;
+ctx.strokeRect(0, 25, 100, 0);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.zero.4.html b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.zero.4.html
new file mode 100644
index 0000000000..d0c284f8e0
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.zero.4.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.strokeRect.zero.4</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.strokeRect.zero.4</h1>
+<p class="desc">strokeRect of Nx0 pixels draws a closed line with no caps</p>
+
+
+<script>
+var t = async_test("strokeRect of Nx0 pixels draws a closed line with no caps");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 250;
+ctx.lineCap = 'round';
+ctx.strokeRect(100, 25, 100, 0);
+_assertPixel(canvas, 50,25, 0,0,0,0);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.zero.4.worker.js b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.zero.4.worker.js
new file mode 100644
index 0000000000..23513a4750
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.zero.4.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.strokeRect.zero.4
+// Description:strokeRect of Nx0 pixels draws a closed line with no caps
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("strokeRect of Nx0 pixels draws a closed line with no caps");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 250;
+ctx.lineCap = 'round';
+ctx.strokeRect(100, 25, 100, 0);
+_assertPixel(canvas, 50,25, 0,0,0,0);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.zero.5.html b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.zero.5.html
new file mode 100644
index 0000000000..2441354c90
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.zero.5.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.strokeRect.zero.5</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.strokeRect.zero.5</h1>
+<p class="desc">strokeRect of Nx0 pixels draws a closed line with joins</p>
+
+
+<script>
+var t = async_test("strokeRect of Nx0 pixels draws a closed line with joins");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 250;
+ctx.lineJoin = 'round';
+ctx.strokeRect(100, 25, 100, 0);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.zero.5.worker.js b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.zero.5.worker.js
new file mode 100644
index 0000000000..0ef9e67725
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/drawing-rectangles-to-the-canvas/2d.strokeRect.zero.5.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.strokeRect.zero.5
+// Description:strokeRect of Nx0 pixels draws a closed line with joins
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("strokeRect of Nx0 pixels draws a closed line with joins");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 250;
+ctx.lineJoin = 'round';
+ctx.strokeRect(100, 25, 100, 0);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.CSSHSL.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.CSSHSL.html
new file mode 100644
index 0000000000..af5b04170d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.CSSHSL.html
@@ -0,0 +1,45 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.CSSHSL</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.CSSHSL</h1>
+<p class="desc">CSSHSL works as color input</p>
+
+
+<script>
+var t = async_test("CSSHSL works as color input");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var offscreenCanvas = new OffscreenCanvas(100, 50);
+var ctx = offscreenCanvas.getContext('2d');
+
+ctx.fillStyle = new CSSHSL(CSS.deg(180), 0.5, 0.5);
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(offscreenCanvas, 50,25, 64,191,191,255, 3);
+
+const color = new CSSHSL(CSS.deg(180), 1, 1);
+ctx.fillStyle = color;
+_assertSame(ctx.fillStyle, '#ffffff', "ctx.fillStyle", "'#ffffff'");
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(offscreenCanvas, 50,25, 255,255,255,255);
+color.l = 0.5;
+ctx.fillStyle = color;
+_assertSame(ctx.fillStyle, '#00ffff', "ctx.fillStyle", "'#00ffff'");
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(offscreenCanvas, 50,25, 0,255,255,255);
+
+ctx.fillStyle = new CSSRGB(1, 0, 1).toHSL();
+_assertSame(ctx.fillStyle, '#ff00ff', "ctx.fillStyle", "'#ff00ff'");
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(offscreenCanvas, 50,25, 255,0,255,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.default.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.default.html
new file mode 100644
index 0000000000..3a3b6a9798
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.default.html
@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.default</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.default</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertSame(ctx.fillStyle, '#000000', "ctx.fillStyle", "'#000000'");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.default.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.default.worker.js
new file mode 100644
index 0000000000..95ae259ca4
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.default.worker.js
@@ -0,0 +1,23 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.default
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertSame(ctx.fillStyle, '#000000', "ctx.fillStyle", "'#000000'");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.get.halftransparent.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.get.halftransparent.html
new file mode 100644
index 0000000000..68b09d06f5
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.get.halftransparent.html
@@ -0,0 +1,28 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.get.halftransparent</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.get.halftransparent</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = 'rgba(255,255,255,0.5)';
+_assertSame(ctx.fillStyle, 'rgba(255, 255, 255, 0.5)', "ctx.fillStyle", "'rgba(255, 255, 255, 0.5)'");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.get.halftransparent.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.get.halftransparent.worker.js
new file mode 100644
index 0000000000..de8f491ca3
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.get.halftransparent.worker.js
@@ -0,0 +1,24 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.get.halftransparent
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = 'rgba(255,255,255,0.5)';
+_assertSame(ctx.fillStyle, 'rgba(255, 255, 255, 0.5)', "ctx.fillStyle", "'rgba(255, 255, 255, 0.5)'");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.get.semitransparent.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.get.semitransparent.html
new file mode 100644
index 0000000000..9f8566809d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.get.semitransparent.html
@@ -0,0 +1,28 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.get.semitransparent</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.get.semitransparent</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = 'rgba(255,255,255,0.45)';
+assert_regexp_match(ctx.fillStyle, /^rgba\(255, 255, 255, 0\.4\d+\)$/);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.get.semitransparent.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.get.semitransparent.worker.js
new file mode 100644
index 0000000000..3715183d55
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.get.semitransparent.worker.js
@@ -0,0 +1,24 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.get.semitransparent
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = 'rgba(255,255,255,0.45)';
+assert_regexp_match(ctx.fillStyle, /^rgba\(255, 255, 255, 0\.4\d+\)$/);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.get.solid.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.get.solid.html
new file mode 100644
index 0000000000..3eca93e237
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.get.solid.html
@@ -0,0 +1,28 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.get.solid</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.get.solid</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#fa0';
+_assertSame(ctx.fillStyle, '#ffaa00', "ctx.fillStyle", "'#ffaa00'");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.get.solid.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.get.solid.worker.js
new file mode 100644
index 0000000000..2ada733651
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.get.solid.worker.js
@@ -0,0 +1,24 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.get.solid
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#fa0';
+_assertSame(ctx.fillStyle, '#ffaa00', "ctx.fillStyle", "'#ffaa00'");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.get.transparent.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.get.transparent.html
new file mode 100644
index 0000000000..caab8e0236
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.get.transparent.html
@@ -0,0 +1,28 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.get.transparent</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.get.transparent</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = 'rgba(0,0,0,0)';
+_assertSame(ctx.fillStyle, 'rgba(0, 0, 0, 0)', "ctx.fillStyle", "'rgba(0, 0, 0, 0)'");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.get.transparent.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.get.transparent.worker.js
new file mode 100644
index 0000000000..57f5facf2e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.get.transparent.worker.js
@@ -0,0 +1,24 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.get.transparent
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = 'rgba(0,0,0,0)';
+_assertSame(ctx.fillStyle, 'rgba(0, 0, 0, 0)', "ctx.fillStyle", "'rgba(0, 0, 0, 0)'");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.invalidstring.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.invalidstring.html
new file mode 100644
index 0000000000..260554c4bc
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.invalidstring.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.invalidstring</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.invalidstring</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.fillStyle = 'invalid';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.invalidstring.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.invalidstring.worker.js
new file mode 100644
index 0000000000..4e4df4f810
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.invalidstring.worker.js
@@ -0,0 +1,28 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.invalidstring
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.fillStyle = 'invalid';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.invalidtype.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.invalidtype.html
new file mode 100644
index 0000000000..53c0f77c8c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.invalidtype.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.invalidtype</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.invalidtype</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.fillStyle = null;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.invalidtype.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.invalidtype.worker.js
new file mode 100644
index 0000000000..19b3120638
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.invalidtype.worker.js
@@ -0,0 +1,28 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.invalidtype
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.fillStyle = null;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsl-1.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsl-1.html
new file mode 100644
index 0000000000..d4a2466b7d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsl-1.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.css-color-4-hsl-1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.css-color-4-hsl-1</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsl(120 100.0% 50.0%)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsl-1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsl-1.worker.js
new file mode 100644
index 0000000000..074d796caf
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsl-1.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.css-color-4-hsl-1
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsl(120 100.0% 50.0%)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsl-2.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsl-2.html
new file mode 100644
index 0000000000..6853ae51ea
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsl-2.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.css-color-4-hsl-2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.css-color-4-hsl-2</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsl(120 100.0% 50.0% / 0.2)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,51);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsl-2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsl-2.worker.js
new file mode 100644
index 0000000000..a4226cf8ca
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsl-2.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.css-color-4-hsl-2
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsl(120 100.0% 50.0% / 0.2)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,51);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsl-3.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsl-3.html
new file mode 100644
index 0000000000..62f4e48ef3
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsl-3.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.css-color-4-hsl-3</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.css-color-4-hsl-3</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsl(120.0, 100.0%, 50.0%, 0.2)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,51);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsl-3.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsl-3.worker.js
new file mode 100644
index 0000000000..de3e3791fa
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsl-3.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.css-color-4-hsl-3
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsl(120.0, 100.0%, 50.0%, 0.2)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,51);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsl-4.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsl-4.html
new file mode 100644
index 0000000000..082ddcd75e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsl-4.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.css-color-4-hsl-4</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.css-color-4-hsl-4</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsl(120.0, 100.0%, 50.0%, 20%)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,51);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsl-4.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsl-4.worker.js
new file mode 100644
index 0000000000..2714bdf835
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsl-4.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.css-color-4-hsl-4
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsl(120.0, 100.0%, 50.0%, 20%)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,51);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsl-5.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsl-5.html
new file mode 100644
index 0000000000..55f92e17ef
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsl-5.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.css-color-4-hsl-5</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.css-color-4-hsl-5</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsl(120deg, 100.0%, 50.0%, 0.2)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,51);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsl-5.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsl-5.worker.js
new file mode 100644
index 0000000000..ef3fe13355
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsl-5.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.css-color-4-hsl-5
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsl(120deg, 100.0%, 50.0%, 0.2)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,51);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsl-6.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsl-6.html
new file mode 100644
index 0000000000..74657fca63
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsl-6.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.css-color-4-hsl-6</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.css-color-4-hsl-6</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsl(120deg, 100.0%, 50.0%)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsl-6.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsl-6.worker.js
new file mode 100644
index 0000000000..a36af9a563
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsl-6.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.css-color-4-hsl-6
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsl(120deg, 100.0%, 50.0%)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsl-7.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsl-7.html
new file mode 100644
index 0000000000..419b15f72e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsl-7.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.css-color-4-hsl-7</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.css-color-4-hsl-7</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsl(133.33333333grad, 100.0%, 50.0%)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsl-7.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsl-7.worker.js
new file mode 100644
index 0000000000..10da1141aa
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsl-7.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.css-color-4-hsl-7
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsl(133.33333333grad, 100.0%, 50.0%)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsl-8.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsl-8.html
new file mode 100644
index 0000000000..a5acc80ef8
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsl-8.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.css-color-4-hsl-8</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.css-color-4-hsl-8</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsl(2.0943951024rad, 100.0%, 50.0%)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsl-8.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsl-8.worker.js
new file mode 100644
index 0000000000..e12f96350b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsl-8.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.css-color-4-hsl-8
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsl(2.0943951024rad, 100.0%, 50.0%)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsl-9.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsl-9.html
new file mode 100644
index 0000000000..dc18415399
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsl-9.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.css-color-4-hsl-9</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.css-color-4-hsl-9</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsl(0.3333333333turn, 100.0%, 50.0%)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsl-9.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsl-9.worker.js
new file mode 100644
index 0000000000..51de0e0b15
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsl-9.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.css-color-4-hsl-9
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsl(0.3333333333turn, 100.0%, 50.0%)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsla-1.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsla-1.html
new file mode 100644
index 0000000000..84b80615be
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsla-1.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.css-color-4-hsla-1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.css-color-4-hsla-1</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsl(120 100.0% 50.0%)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsla-1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsla-1.worker.js
new file mode 100644
index 0000000000..2d7abab3be
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsla-1.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.css-color-4-hsla-1
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsl(120 100.0% 50.0%)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsla-2.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsla-2.html
new file mode 100644
index 0000000000..a3f2c67ab4
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsla-2.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.css-color-4-hsla-2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.css-color-4-hsla-2</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsl(120 100.0% 50.0% / 0.2)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,51);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsla-2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsla-2.worker.js
new file mode 100644
index 0000000000..dd66b1d079
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsla-2.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.css-color-4-hsla-2
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsl(120 100.0% 50.0% / 0.2)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,51);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsla-3.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsla-3.html
new file mode 100644
index 0000000000..5b809ba567
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsla-3.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.css-color-4-hsla-3</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.css-color-4-hsla-3</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsl(120.0, 100.0%, 50.0%, 0.2)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,51);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsla-3.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsla-3.worker.js
new file mode 100644
index 0000000000..7ef6d8f475
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsla-3.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.css-color-4-hsla-3
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsl(120.0, 100.0%, 50.0%, 0.2)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,51);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsla-4.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsla-4.html
new file mode 100644
index 0000000000..3e063664fb
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsla-4.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.css-color-4-hsla-4</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.css-color-4-hsla-4</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsl(120.0, 100.0%, 50.0%, 20%)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,51);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsla-4.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsla-4.worker.js
new file mode 100644
index 0000000000..ed1dec0162
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsla-4.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.css-color-4-hsla-4
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsl(120.0, 100.0%, 50.0%, 20%)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,51);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsla-5.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsla-5.html
new file mode 100644
index 0000000000..34f626a0a5
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsla-5.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.css-color-4-hsla-5</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.css-color-4-hsla-5</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsl(120deg, 100.0%, 50.0%, 0.2)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,51);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsla-5.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsla-5.worker.js
new file mode 100644
index 0000000000..89042269ab
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsla-5.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.css-color-4-hsla-5
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsl(120deg, 100.0%, 50.0%, 0.2)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,51);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsla-6.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsla-6.html
new file mode 100644
index 0000000000..3c1a23bf37
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsla-6.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.css-color-4-hsla-6</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.css-color-4-hsla-6</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsl(120deg, 100.0%, 50.0%)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsla-6.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsla-6.worker.js
new file mode 100644
index 0000000000..645081df5e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsla-6.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.css-color-4-hsla-6
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsl(120deg, 100.0%, 50.0%)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsla-7.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsla-7.html
new file mode 100644
index 0000000000..cc874e8fbe
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsla-7.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.css-color-4-hsla-7</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.css-color-4-hsla-7</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsl(133.33333333grad, 100.0%, 50.0%)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsla-7.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsla-7.worker.js
new file mode 100644
index 0000000000..f42602ebc3
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsla-7.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.css-color-4-hsla-7
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsl(133.33333333grad, 100.0%, 50.0%)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsla-8.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsla-8.html
new file mode 100644
index 0000000000..7501436481
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsla-8.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.css-color-4-hsla-8</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.css-color-4-hsla-8</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsl(2.0943951024rad, 100.0%, 50.0%)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsla-8.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsla-8.worker.js
new file mode 100644
index 0000000000..376cb94c90
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsla-8.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.css-color-4-hsla-8
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsl(2.0943951024rad, 100.0%, 50.0%)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsla-9.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsla-9.html
new file mode 100644
index 0000000000..f759e6910b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsla-9.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.css-color-4-hsla-9</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.css-color-4-hsla-9</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsl(0.3333333333turn, 100.0%, 50.0%)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsla-9.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsla-9.worker.js
new file mode 100644
index 0000000000..58f404175d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-hsla-9.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.css-color-4-hsla-9
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsl(0.3333333333turn, 100.0%, 50.0%)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgb-1.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgb-1.html
new file mode 100644
index 0000000000..44648751a3
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgb-1.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.css-color-4-rgb-1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.css-color-4-rgb-1</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'rgb(0, 255.0, 0)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgb-1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgb-1.worker.js
new file mode 100644
index 0000000000..34ecf3d318
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgb-1.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.css-color-4-rgb-1
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'rgb(0, 255.0, 0)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgb-2.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgb-2.html
new file mode 100644
index 0000000000..328d731e49
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgb-2.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.css-color-4-rgb-2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.css-color-4-rgb-2</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'rgb(0, 255, 0, 0.2)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,51);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgb-2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgb-2.worker.js
new file mode 100644
index 0000000000..958d5df352
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgb-2.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.css-color-4-rgb-2
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'rgb(0, 255, 0, 0.2)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,51);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgb-3.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgb-3.html
new file mode 100644
index 0000000000..1dc99c24c7
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgb-3.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.css-color-4-rgb-3</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.css-color-4-rgb-3</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'rgb(0, 255, 0, 20%)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,51);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgb-3.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgb-3.worker.js
new file mode 100644
index 0000000000..f82df16e9a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgb-3.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.css-color-4-rgb-3
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'rgb(0, 255, 0, 20%)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,51);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgb-4.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgb-4.html
new file mode 100644
index 0000000000..1b72c4f235
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgb-4.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.css-color-4-rgb-4</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.css-color-4-rgb-4</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'rgb(0 255 0)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgb-4.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgb-4.worker.js
new file mode 100644
index 0000000000..08dba89ec8
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgb-4.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.css-color-4-rgb-4
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'rgb(0 255 0)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgb-5.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgb-5.html
new file mode 100644
index 0000000000..9044fe81a4
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgb-5.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.css-color-4-rgb-5</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.css-color-4-rgb-5</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'rgb(0 255 0 / 0.2)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,51);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgb-5.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgb-5.worker.js
new file mode 100644
index 0000000000..27ccca6c64
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgb-5.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.css-color-4-rgb-5
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'rgb(0 255 0 / 0.2)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,51);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgb-6.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgb-6.html
new file mode 100644
index 0000000000..66cb90876f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgb-6.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.css-color-4-rgb-6</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.css-color-4-rgb-6</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'rgb(0 255 0 / 20%)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,51);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgb-6.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgb-6.worker.js
new file mode 100644
index 0000000000..3ff4312fcb
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgb-6.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.css-color-4-rgb-6
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'rgb(0 255 0 / 20%)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,51);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgba-1.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgba-1.html
new file mode 100644
index 0000000000..a0d2239244
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgba-1.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.css-color-4-rgba-1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.css-color-4-rgba-1</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'rgba(0, 255.0, 0)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgba-1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgba-1.worker.js
new file mode 100644
index 0000000000..ef45434cab
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgba-1.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.css-color-4-rgba-1
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'rgba(0, 255.0, 0)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgba-2.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgba-2.html
new file mode 100644
index 0000000000..96dcbf61d8
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgba-2.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.css-color-4-rgba-2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.css-color-4-rgba-2</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'rgba(0, 255, 0, 0.2)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,51);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgba-2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgba-2.worker.js
new file mode 100644
index 0000000000..e03f5252e9
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgba-2.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.css-color-4-rgba-2
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'rgba(0, 255, 0, 0.2)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,51);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgba-3.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgba-3.html
new file mode 100644
index 0000000000..f972e83696
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgba-3.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.css-color-4-rgba-3</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.css-color-4-rgba-3</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'rgba(0, 255, 0, 20%)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,51);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgba-3.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgba-3.worker.js
new file mode 100644
index 0000000000..3bc693f212
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgba-3.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.css-color-4-rgba-3
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'rgba(0, 255, 0, 20%)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,51);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgba-4.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgba-4.html
new file mode 100644
index 0000000000..6825e8658a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgba-4.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.css-color-4-rgba-4</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.css-color-4-rgba-4</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'rgba(0 255 0)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgba-4.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgba-4.worker.js
new file mode 100644
index 0000000000..a50cc026bb
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgba-4.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.css-color-4-rgba-4
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'rgba(0 255 0)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgba-5.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgba-5.html
new file mode 100644
index 0000000000..7c8b19c80d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgba-5.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.css-color-4-rgba-5</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.css-color-4-rgba-5</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'rgba(0 255 0 / 0.2)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,51);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgba-5.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgba-5.worker.js
new file mode 100644
index 0000000000..e134e34b29
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgba-5.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.css-color-4-rgba-5
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'rgba(0 255 0 / 0.2)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,51);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgba-6.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgba-6.html
new file mode 100644
index 0000000000..b63b46f9d2
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgba-6.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.css-color-4-rgba-6</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.css-color-4-rgba-6</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'rgba(0 255 0 / 20%)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,51);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgba-6.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgba-6.worker.js
new file mode 100644
index 0000000000..3e401de74d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.css-color-4-rgba-6.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.css-color-4-rgba-6
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'rgba(0 255 0 / 20%)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,51);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hex3.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hex3.html
new file mode 100644
index 0000000000..90d3e6037e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hex3.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.hex3</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.hex3</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hex3.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hex3.worker.js
new file mode 100644
index 0000000000..9f0d0a4322
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hex3.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.hex3
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hex4.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hex4.html
new file mode 100644
index 0000000000..d10e3a8910
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hex4.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.hex4</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.hex4</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = '#0f0f';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hex4.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hex4.worker.js
new file mode 100644
index 0000000000..fa84ca1352
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hex4.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.hex4
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = '#0f0f';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hex6.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hex6.html
new file mode 100644
index 0000000000..69394c9a83
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hex6.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.hex6</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.hex6</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = '#00fF00';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hex6.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hex6.worker.js
new file mode 100644
index 0000000000..cb432b4f99
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hex6.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.hex6
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = '#00fF00';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hex8.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hex8.html
new file mode 100644
index 0000000000..80abfe3265
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hex8.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.hex8</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.hex8</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = '#00ff00ff';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hex8.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hex8.worker.js
new file mode 100644
index 0000000000..e114569893
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hex8.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.hex8
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = '#00ff00ff';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsl-1.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsl-1.html
new file mode 100644
index 0000000000..65e5c18747
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsl-1.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.hsl-1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.hsl-1</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsl(120, 100%, 50%)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsl-1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsl-1.worker.js
new file mode 100644
index 0000000000..83d507c826
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsl-1.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.hsl-1
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsl(120, 100%, 50%)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsl-2.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsl-2.html
new file mode 100644
index 0000000000..fdd78ad7be
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsl-2.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.hsl-2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.hsl-2</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsl( -240 , 100% , 50% )';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsl-2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsl-2.worker.js
new file mode 100644
index 0000000000..0dfc848716
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsl-2.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.hsl-2
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsl( -240 , 100% , 50% )';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsl-3.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsl-3.html
new file mode 100644
index 0000000000..5169244407
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsl-3.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.hsl-3</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.hsl-3</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsl(360120, 100%, 50%)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsl-3.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsl-3.worker.js
new file mode 100644
index 0000000000..54dec44d38
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsl-3.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.hsl-3
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsl(360120, 100%, 50%)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsl-4.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsl-4.html
new file mode 100644
index 0000000000..90f30ab92c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsl-4.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.hsl-4</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.hsl-4</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsl(-360240, 100%, 50%)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsl-4.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsl-4.worker.js
new file mode 100644
index 0000000000..43c20668af
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsl-4.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.hsl-4
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsl(-360240, 100%, 50%)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsl-5.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsl-5.html
new file mode 100644
index 0000000000..7760e236fd
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsl-5.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.hsl-5</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.hsl-5</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsl(120.0, 100.0%, 50.0%)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsl-5.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsl-5.worker.js
new file mode 100644
index 0000000000..d4c95c10b2
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsl-5.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.hsl-5
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsl(120.0, 100.0%, 50.0%)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsl-6.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsl-6.html
new file mode 100644
index 0000000000..795092931b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsl-6.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.hsl-6</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.hsl-6</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsl(+120, +100%, +50%)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsl-6.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsl-6.worker.js
new file mode 100644
index 0000000000..f5acc2df25
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsl-6.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.hsl-6
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsl(+120, +100%, +50%)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsl-clamp-1.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsl-clamp-1.html
new file mode 100644
index 0000000000..1b375468ba
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsl-clamp-1.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.hsl-clamp-1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.hsl-clamp-1</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsl(120, 200%, 50%)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsl-clamp-1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsl-clamp-1.worker.js
new file mode 100644
index 0000000000..cc3308d7ed
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsl-clamp-1.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.hsl-clamp-1
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsl(120, 200%, 50%)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsl-clamp-2.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsl-clamp-2.html
new file mode 100644
index 0000000000..0133f7f50a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsl-clamp-2.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.hsl-clamp-2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.hsl-clamp-2</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsl(120, -200%, 49.9%)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 127,127,127,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsl-clamp-2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsl-clamp-2.worker.js
new file mode 100644
index 0000000000..48c23aa10a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsl-clamp-2.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.hsl-clamp-2
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsl(120, -200%, 49.9%)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 127,127,127,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsl-clamp-3.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsl-clamp-3.html
new file mode 100644
index 0000000000..e35355c21c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsl-clamp-3.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.hsl-clamp-3</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.hsl-clamp-3</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsl(120, 100%, 200%)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 255,255,255,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsl-clamp-3.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsl-clamp-3.worker.js
new file mode 100644
index 0000000000..ef1ac418c9
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsl-clamp-3.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.hsl-clamp-3
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsl(120, 100%, 200%)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 255,255,255,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsl-clamp-4.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsl-clamp-4.html
new file mode 100644
index 0000000000..c42b6f1f5d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsl-clamp-4.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.hsl-clamp-4</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.hsl-clamp-4</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsl(120, 100%, -200%)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,0,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsl-clamp-4.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsl-clamp-4.worker.js
new file mode 100644
index 0000000000..061685dbde
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsl-clamp-4.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.hsl-clamp-4
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsl(120, 100%, -200%)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,0,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsla-1.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsla-1.html
new file mode 100644
index 0000000000..0defd457ab
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsla-1.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.hsla-1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.hsla-1</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsla(120, 100%, 50%, 0.499)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,127);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsla-1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsla-1.worker.js
new file mode 100644
index 0000000000..64a26e6ca3
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsla-1.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.hsla-1
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsla(120, 100%, 50%, 0.499)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,127);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsla-2.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsla-2.html
new file mode 100644
index 0000000000..0498edd6da
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsla-2.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.hsla-2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.hsla-2</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsla( 120.0 , 100.0% , 50.0% , 1 )';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsla-2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsla-2.worker.js
new file mode 100644
index 0000000000..6101f0e3ab
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsla-2.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.hsla-2
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsla( 120.0 , 100.0% , 50.0% , 1 )';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsla-clamp-1.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsla-clamp-1.html
new file mode 100644
index 0000000000..313ecf277c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsla-clamp-1.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.hsla-clamp-1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.hsla-clamp-1</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsla(120, 200%, 50%, 1)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsla-clamp-1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsla-clamp-1.worker.js
new file mode 100644
index 0000000000..8724efd28a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsla-clamp-1.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.hsla-clamp-1
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsla(120, 200%, 50%, 1)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsla-clamp-2.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsla-clamp-2.html
new file mode 100644
index 0000000000..761471f43a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsla-clamp-2.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.hsla-clamp-2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.hsla-clamp-2</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsla(120, -200%, 49.9%, 1)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 127,127,127,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsla-clamp-2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsla-clamp-2.worker.js
new file mode 100644
index 0000000000..af4271c66c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsla-clamp-2.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.hsla-clamp-2
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsla(120, -200%, 49.9%, 1)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 127,127,127,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsla-clamp-3.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsla-clamp-3.html
new file mode 100644
index 0000000000..287a23a58a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsla-clamp-3.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.hsla-clamp-3</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.hsla-clamp-3</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsla(120, 100%, 200%, 1)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 255,255,255,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsla-clamp-3.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsla-clamp-3.worker.js
new file mode 100644
index 0000000000..1e10a76dc2
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsla-clamp-3.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.hsla-clamp-3
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsla(120, 100%, 200%, 1)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 255,255,255,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsla-clamp-4.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsla-clamp-4.html
new file mode 100644
index 0000000000..a0e420cab2
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsla-clamp-4.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.hsla-clamp-4</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.hsla-clamp-4</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsla(120, 100%, -200%, 1)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,0,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsla-clamp-4.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsla-clamp-4.worker.js
new file mode 100644
index 0000000000..e746bc3472
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsla-clamp-4.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.hsla-clamp-4
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsla(120, 100%, -200%, 1)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,0,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsla-clamp-5.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsla-clamp-5.html
new file mode 100644
index 0000000000..0683719749
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsla-clamp-5.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.hsla-clamp-5</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.hsla-clamp-5</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsla(120, 100%, 50%, 2)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsla-clamp-5.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsla-clamp-5.worker.js
new file mode 100644
index 0000000000..61d86a8a95
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsla-clamp-5.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.hsla-clamp-5
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsla(120, 100%, 50%, 2)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsla-clamp-6.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsla-clamp-6.html
new file mode 100644
index 0000000000..a810639519
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsla-clamp-6.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.hsla-clamp-6</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.hsla-clamp-6</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsla(120, 100%, 0%, -2)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,0,0,0);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsla-clamp-6.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsla-clamp-6.worker.js
new file mode 100644
index 0000000000..57c0d587ee
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.hsla-clamp-6.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.hsla-clamp-6
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'hsla(120, 100%, 0%, -2)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,0,0,0);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.html4.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.html4.html
new file mode 100644
index 0000000000..767768ab2f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.html4.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.html4</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.html4</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'limE';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.html4.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.html4.worker.js
new file mode 100644
index 0000000000..a8b8552afb
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.html4.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.html4
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'limE';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-hsl-1.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-hsl-1.html
new file mode 100644
index 0000000000..1a227a436a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-hsl-1.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.invalid.css-color-4-hsl-1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.invalid.css-color-4-hsl-1</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'hsl(0, 100%, 50% / 1)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-hsl-1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-hsl-1.worker.js
new file mode 100644
index 0000000000..20fc879bc6
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-hsl-1.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.invalid.css-color-4-hsl-1
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'hsl(0, 100%, 50% / 1)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-hsl-2.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-hsl-2.html
new file mode 100644
index 0000000000..36b95ed247
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-hsl-2.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.invalid.css-color-4-hsl-2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.invalid.css-color-4-hsl-2</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'hsl(0 100% 50%, 1)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-hsl-2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-hsl-2.worker.js
new file mode 100644
index 0000000000..c2c6fc0ace
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-hsl-2.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.invalid.css-color-4-hsl-2
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'hsl(0 100% 50%, 1)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-hsl-3.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-hsl-3.html
new file mode 100644
index 0000000000..d208c6296b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-hsl-3.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.invalid.css-color-4-hsl-3</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.invalid.css-color-4-hsl-3</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'hsl(0, 100% 50%)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-hsl-3.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-hsl-3.worker.js
new file mode 100644
index 0000000000..c2f90ef320
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-hsl-3.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.invalid.css-color-4-hsl-3
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'hsl(0, 100% 50%)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-hsl-4.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-hsl-4.html
new file mode 100644
index 0000000000..2fba5aaf9c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-hsl-4.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.invalid.css-color-4-hsl-4</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.invalid.css-color-4-hsl-4</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'hsl(0 100% 50% /)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-hsl-4.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-hsl-4.worker.js
new file mode 100644
index 0000000000..6903ae94c2
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-hsl-4.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.invalid.css-color-4-hsl-4
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'hsl(0 100% 50% /)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-hsl-5.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-hsl-5.html
new file mode 100644
index 0000000000..f340a52aa8
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-hsl-5.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.invalid.css-color-4-hsl-5</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.invalid.css-color-4-hsl-5</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'hsl(0, 100%, 50% /)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-hsl-5.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-hsl-5.worker.js
new file mode 100644
index 0000000000..8f0cfc0cba
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-hsl-5.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.invalid.css-color-4-hsl-5
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'hsl(0, 100%, 50% /)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-hsla-1.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-hsla-1.html
new file mode 100644
index 0000000000..834a1b7b18
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-hsla-1.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.invalid.css-color-4-hsla-1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.invalid.css-color-4-hsla-1</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'hsla(0, 100%, 50% / 1)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-hsla-1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-hsla-1.worker.js
new file mode 100644
index 0000000000..45e074321e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-hsla-1.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.invalid.css-color-4-hsla-1
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'hsla(0, 100%, 50% / 1)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-hsla-2.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-hsla-2.html
new file mode 100644
index 0000000000..cd33bbf800
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-hsla-2.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.invalid.css-color-4-hsla-2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.invalid.css-color-4-hsla-2</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'hsla(0 100% 50%, 1)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-hsla-2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-hsla-2.worker.js
new file mode 100644
index 0000000000..e0d75717db
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-hsla-2.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.invalid.css-color-4-hsla-2
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'hsla(0 100% 50%, 1)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-hsla-3.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-hsla-3.html
new file mode 100644
index 0000000000..fd01b7623a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-hsla-3.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.invalid.css-color-4-hsla-3</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.invalid.css-color-4-hsla-3</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'hsla(0, 100% 50%)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-hsla-3.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-hsla-3.worker.js
new file mode 100644
index 0000000000..4adb92bb64
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-hsla-3.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.invalid.css-color-4-hsla-3
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'hsla(0, 100% 50%)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-rgb-1.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-rgb-1.html
new file mode 100644
index 0000000000..f1e1b2ab37
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-rgb-1.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.invalid.css-color-4-rgb-1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.invalid.css-color-4-rgb-1</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'rgb(255, 0, 0 / 1)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-rgb-1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-rgb-1.worker.js
new file mode 100644
index 0000000000..450556b31b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-rgb-1.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.invalid.css-color-4-rgb-1
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'rgb(255, 0, 0 / 1)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-rgb-2.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-rgb-2.html
new file mode 100644
index 0000000000..dc22f99e3d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-rgb-2.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.invalid.css-color-4-rgb-2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.invalid.css-color-4-rgb-2</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'rgb(255 0 0, 1)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-rgb-2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-rgb-2.worker.js
new file mode 100644
index 0000000000..35217d1b80
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-rgb-2.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.invalid.css-color-4-rgb-2
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'rgb(255 0 0, 1)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-rgb-3.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-rgb-3.html
new file mode 100644
index 0000000000..434c15eccb
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-rgb-3.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.invalid.css-color-4-rgb-3</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.invalid.css-color-4-rgb-3</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'rgb(255, 0 0)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-rgb-3.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-rgb-3.worker.js
new file mode 100644
index 0000000000..28200cfdd5
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-rgb-3.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.invalid.css-color-4-rgb-3
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'rgb(255, 0 0)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-rgb-4.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-rgb-4.html
new file mode 100644
index 0000000000..58ed0e7318
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-rgb-4.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.invalid.css-color-4-rgb-4</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.invalid.css-color-4-rgb-4</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'rgb(0 0 0 /)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-rgb-4.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-rgb-4.worker.js
new file mode 100644
index 0000000000..1830996c26
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-rgb-4.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.invalid.css-color-4-rgb-4
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'rgb(0 0 0 /)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-rgb-5.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-rgb-5.html
new file mode 100644
index 0000000000..95643739c4
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-rgb-5.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.invalid.css-color-4-rgb-5</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.invalid.css-color-4-rgb-5</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'rgb(0, 0, 0 /)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-rgb-5.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-rgb-5.worker.js
new file mode 100644
index 0000000000..4591bbde34
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-rgb-5.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.invalid.css-color-4-rgb-5
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'rgb(0, 0, 0 /)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-rgba-1.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-rgba-1.html
new file mode 100644
index 0000000000..5ae093eae1
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-rgba-1.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.invalid.css-color-4-rgba-1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.invalid.css-color-4-rgba-1</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'rgba(255, 0, 0 / 1)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-rgba-1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-rgba-1.worker.js
new file mode 100644
index 0000000000..d9a315c98d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-rgba-1.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.invalid.css-color-4-rgba-1
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'rgba(255, 0, 0 / 1)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-rgba-2.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-rgba-2.html
new file mode 100644
index 0000000000..036f389153
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-rgba-2.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.invalid.css-color-4-rgba-2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.invalid.css-color-4-rgba-2</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'rgba(255 0 0, 1)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-rgba-2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-rgba-2.worker.js
new file mode 100644
index 0000000000..1fc2f5d863
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-rgba-2.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.invalid.css-color-4-rgba-2
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'rgba(255 0 0, 1)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-rgba-3.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-rgba-3.html
new file mode 100644
index 0000000000..663557987a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-rgba-3.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.invalid.css-color-4-rgba-3</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.invalid.css-color-4-rgba-3</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'rgba(255, 0 0)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-rgba-3.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-rgba-3.worker.js
new file mode 100644
index 0000000000..1eadf9125b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.css-color-4-rgba-3.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.invalid.css-color-4-rgba-3
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'rgba(255, 0 0)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hex1.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hex1.html
new file mode 100644
index 0000000000..83e1c410f5
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hex1.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.invalid.hex1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.invalid.hex1</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = '#f'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hex1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hex1.worker.js
new file mode 100644
index 0000000000..3807fd3311
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hex1.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.invalid.hex1
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = '#f'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hex2.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hex2.html
new file mode 100644
index 0000000000..453ec4bd5c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hex2.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.invalid.hex2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.invalid.hex2</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = '#f0'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hex2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hex2.worker.js
new file mode 100644
index 0000000000..9bb7e2c33c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hex2.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.invalid.hex2
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = '#f0'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hex3.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hex3.html
new file mode 100644
index 0000000000..c1d4e8c1e8
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hex3.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.invalid.hex3</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.invalid.hex3</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = '#g00'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hex3.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hex3.worker.js
new file mode 100644
index 0000000000..4eaa0b0d0f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hex3.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.invalid.hex3
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = '#g00'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hex4.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hex4.html
new file mode 100644
index 0000000000..89c23a0074
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hex4.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.invalid.hex4</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.invalid.hex4</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = '#fg00'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hex4.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hex4.worker.js
new file mode 100644
index 0000000000..ceffb191b2
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hex4.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.invalid.hex4
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = '#fg00'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hex5.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hex5.html
new file mode 100644
index 0000000000..4d62d09be0
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hex5.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.invalid.hex5</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.invalid.hex5</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = '#ff000'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hex5.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hex5.worker.js
new file mode 100644
index 0000000000..7225544f8b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hex5.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.invalid.hex5
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = '#ff000'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hex6.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hex6.html
new file mode 100644
index 0000000000..69dfdc723f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hex6.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.invalid.hex6</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.invalid.hex6</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = '#fg0000'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hex6.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hex6.worker.js
new file mode 100644
index 0000000000..2e5a93b49a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hex6.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.invalid.hex6
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = '#fg0000'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hex7.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hex7.html
new file mode 100644
index 0000000000..2be93ca69a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hex7.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.invalid.hex7</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.invalid.hex7</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = '#ff0000f'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hex7.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hex7.worker.js
new file mode 100644
index 0000000000..fbd4a887c5
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hex7.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.invalid.hex7
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = '#ff0000f'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hex8.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hex8.html
new file mode 100644
index 0000000000..f67758d42e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hex8.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.invalid.hex8</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.invalid.hex8</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = '#fg0000ff'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hex8.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hex8.worker.js
new file mode 100644
index 0000000000..fcc230ce9d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hex8.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.invalid.hex8
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = '#fg0000ff'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hsl-1.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hsl-1.html
new file mode 100644
index 0000000000..54e6711137
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hsl-1.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.invalid.hsl-1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.invalid.hsl-1</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'hsl(0%, 100%, 50%)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hsl-1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hsl-1.worker.js
new file mode 100644
index 0000000000..3b0bb9165b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hsl-1.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.invalid.hsl-1
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'hsl(0%, 100%, 50%)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hsl-2.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hsl-2.html
new file mode 100644
index 0000000000..7614b8c34d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hsl-2.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.invalid.hsl-2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.invalid.hsl-2</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'hsl(z, 100%, 50%)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hsl-2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hsl-2.worker.js
new file mode 100644
index 0000000000..ec906f7fa1
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hsl-2.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.invalid.hsl-2
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'hsl(z, 100%, 50%)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hsl-3.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hsl-3.html
new file mode 100644
index 0000000000..13d19ac924
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hsl-3.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.invalid.hsl-3</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.invalid.hsl-3</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'hsl(0, 0, 50%)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hsl-3.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hsl-3.worker.js
new file mode 100644
index 0000000000..370eba2097
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hsl-3.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.invalid.hsl-3
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'hsl(0, 0, 50%)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hsl-4.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hsl-4.html
new file mode 100644
index 0000000000..9f01aa2180
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hsl-4.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.invalid.hsl-4</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.invalid.hsl-4</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'hsl(0, 100%, 0)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hsl-4.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hsl-4.worker.js
new file mode 100644
index 0000000000..9d53d26c96
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hsl-4.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.invalid.hsl-4
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'hsl(0, 100%, 0)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hsl-5.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hsl-5.html
new file mode 100644
index 0000000000..23f38067a9
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hsl-5.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.invalid.hsl-5</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.invalid.hsl-5</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'hsl(0, 100.%, 50%)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hsl-5.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hsl-5.worker.js
new file mode 100644
index 0000000000..98f4b1c721
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hsl-5.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.invalid.hsl-5
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'hsl(0, 100.%, 50%)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hsl-6.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hsl-6.html
new file mode 100644
index 0000000000..405a0e52b2
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hsl-6.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.invalid.hsl-6</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.invalid.hsl-6</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'hsl(0, 100%, 50%,)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hsl-6.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hsl-6.worker.js
new file mode 100644
index 0000000000..8718547002
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hsl-6.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.invalid.hsl-6
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'hsl(0, 100%, 50%,)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hsla-1.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hsla-1.html
new file mode 100644
index 0000000000..ae9d7986b7
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hsla-1.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.invalid.hsla-1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.invalid.hsla-1</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'hsla(0%, 100%, 50%, 1)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hsla-1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hsla-1.worker.js
new file mode 100644
index 0000000000..b6a70f2a42
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hsla-1.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.invalid.hsla-1
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'hsla(0%, 100%, 50%, 1)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hsla-2.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hsla-2.html
new file mode 100644
index 0000000000..de123411ec
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hsla-2.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.invalid.hsla-2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.invalid.hsla-2</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'hsla(0, 0, 50%, 1)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hsla-2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hsla-2.worker.js
new file mode 100644
index 0000000000..809c805352
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hsla-2.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.invalid.hsla-2
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'hsla(0, 0, 50%, 1)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hsla-3.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hsla-3.html
new file mode 100644
index 0000000000..beab07b862
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hsla-3.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.invalid.hsla-3</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.invalid.hsla-3</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'hsla(0, 0, 50%, 1,)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hsla-3.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hsla-3.worker.js
new file mode 100644
index 0000000000..4d2b53bbeb
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.hsla-3.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.invalid.hsla-3
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'hsla(0, 0, 50%, 1,)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.name-1.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.name-1.html
new file mode 100644
index 0000000000..4ac286e616
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.name-1.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.invalid.name-1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.invalid.name-1</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'darkbrown'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.name-1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.name-1.worker.js
new file mode 100644
index 0000000000..ef588934c1
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.name-1.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.invalid.name-1
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'darkbrown'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.name-2.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.name-2.html
new file mode 100644
index 0000000000..6b54c1816b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.name-2.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.invalid.name-2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.invalid.name-2</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'firebrick1'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.name-2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.name-2.worker.js
new file mode 100644
index 0000000000..b66a07419c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.name-2.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.invalid.name-2
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'firebrick1'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.name-3.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.name-3.html
new file mode 100644
index 0000000000..05cfaa906d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.name-3.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.invalid.name-3</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.invalid.name-3</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'red blue'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.name-3.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.name-3.worker.js
new file mode 100644
index 0000000000..da51a4ab2a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.name-3.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.invalid.name-3
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'red blue'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.name-4.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.name-4.html
new file mode 100644
index 0000000000..47aab58ada
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.name-4.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.invalid.name-4</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.invalid.name-4</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = '"red"'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.name-4.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.name-4.worker.js
new file mode 100644
index 0000000000..c167c2b955
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.name-4.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.invalid.name-4
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = '"red"'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.name-5.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.name-5.html
new file mode 100644
index 0000000000..af19e193e0
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.name-5.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.invalid.name-5</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.invalid.name-5</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = '"red'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.name-5.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.name-5.worker.js
new file mode 100644
index 0000000000..8fe3a9b13e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.name-5.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.invalid.name-5
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = '"red'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.rgb-1.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.rgb-1.html
new file mode 100644
index 0000000000..300bb85ee2
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.rgb-1.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.invalid.rgb-1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.invalid.rgb-1</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'rgb(255.0, 0, 0,)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.rgb-1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.rgb-1.worker.js
new file mode 100644
index 0000000000..3c97d856c7
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.rgb-1.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.invalid.rgb-1
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'rgb(255.0, 0, 0,)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.rgb-2.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.rgb-2.html
new file mode 100644
index 0000000000..8bc9c079dd
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.rgb-2.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.invalid.rgb-2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.invalid.rgb-2</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'rgb(100%, 0, 0)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.rgb-2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.rgb-2.worker.js
new file mode 100644
index 0000000000..7e4e27c914
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.rgb-2.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.invalid.rgb-2
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'rgb(100%, 0, 0)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.rgb-3.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.rgb-3.html
new file mode 100644
index 0000000000..11e93a1c72
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.rgb-3.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.invalid.rgb-3</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.invalid.rgb-3</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'rgb(255, - 1, 0)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.rgb-3.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.rgb-3.worker.js
new file mode 100644
index 0000000000..59d89f7b51
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.rgb-3.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.invalid.rgb-3
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'rgb(255, - 1, 0)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.rgba-1.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.rgba-1.html
new file mode 100644
index 0000000000..3a0b399117
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.rgba-1.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.invalid.rgba-1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.invalid.rgba-1</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'rgba(100%, 0, 0, 1)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.rgba-1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.rgba-1.worker.js
new file mode 100644
index 0000000000..efd7640594
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.rgba-1.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.invalid.rgba-1
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'rgba(100%, 0, 0, 1)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.rgba-2.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.rgba-2.html
new file mode 100644
index 0000000000..28a2180520
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.rgba-2.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.invalid.rgba-2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.invalid.rgba-2</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'rgba(255, 0, 0, 1. 0)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.rgba-2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.rgba-2.worker.js
new file mode 100644
index 0000000000..dfdafb1a7e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.rgba-2.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.invalid.rgba-2
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'rgba(255, 0, 0, 1. 0)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.rgba-3.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.rgba-3.html
new file mode 100644
index 0000000000..d9ad0be5e5
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.rgba-3.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.invalid.rgba-3</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.invalid.rgba-3</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'rgba(255, 0, 0, 1.)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.rgba-3.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.rgba-3.worker.js
new file mode 100644
index 0000000000..1dca0eb9b1
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.rgba-3.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.invalid.rgba-3
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'rgba(255, 0, 0, 1.)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.rgba-4.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.rgba-4.html
new file mode 100644
index 0000000000..db71a88e70
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.rgba-4.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.invalid.rgba-4</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.invalid.rgba-4</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'rgba(255, 0, 0, '; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.rgba-4.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.rgba-4.worker.js
new file mode 100644
index 0000000000..dff64ba907
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.rgba-4.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.invalid.rgba-4
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'rgba(255, 0, 0, '; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.rgba-5.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.rgba-5.html
new file mode 100644
index 0000000000..00e7791bcb
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.rgba-5.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.invalid.rgba-5</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.invalid.rgba-5</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'rgba(255, 0, 0, 1,)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.rgba-5.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.rgba-5.worker.js
new file mode 100644
index 0000000000..80a65dcbc2
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.invalid.rgba-5.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.invalid.rgba-5
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#0f0';
+try { ctx.fillStyle = 'rgba(255, 0, 0, 1,)'; } catch (e) { } // this shouldn't throw, but it shouldn't matter here if it does
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgb-clamp-1.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgb-clamp-1.html
new file mode 100644
index 0000000000..ce03f7b840
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgb-clamp-1.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.rgb-clamp-1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.rgb-clamp-1</h1>
+<p class="desc"></p>
+
+<p class="notes">Assumes colors are clamped to [0,255].
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'rgb(-1000, 1000, -1000)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgb-clamp-1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgb-clamp-1.worker.js
new file mode 100644
index 0000000000..48cf6a72f5
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgb-clamp-1.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.rgb-clamp-1
+// Description:
+// Note:<p class="notes">Assumes colors are clamped to [0,255].
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'rgb(-1000, 1000, -1000)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgb-clamp-2.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgb-clamp-2.html
new file mode 100644
index 0000000000..e4f9260ec6
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgb-clamp-2.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.rgb-clamp-2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.rgb-clamp-2</h1>
+<p class="desc"></p>
+
+<p class="notes">Assumes colors are clamped to [0,255].
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'rgb(-200%, 200%, -200%)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgb-clamp-2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgb-clamp-2.worker.js
new file mode 100644
index 0000000000..70adec462a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgb-clamp-2.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.rgb-clamp-2
+// Description:
+// Note:<p class="notes">Assumes colors are clamped to [0,255].
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'rgb(-200%, 200%, -200%)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgb-clamp-3.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgb-clamp-3.html
new file mode 100644
index 0000000000..73bbc00d1e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgb-clamp-3.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.rgb-clamp-3</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.rgb-clamp-3</h1>
+<p class="desc"></p>
+
+<p class="notes">Assumes colors are clamped to [0,255].
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'rgb(-2147483649, 4294967298, -18446744073709551619)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgb-clamp-3.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgb-clamp-3.worker.js
new file mode 100644
index 0000000000..883328b42d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgb-clamp-3.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.rgb-clamp-3
+// Description:
+// Note:<p class="notes">Assumes colors are clamped to [0,255].
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'rgb(-2147483649, 4294967298, -18446744073709551619)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgb-clamp-4.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgb-clamp-4.html
new file mode 100644
index 0000000000..1bdb70d68c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgb-clamp-4.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.rgb-clamp-4</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.rgb-clamp-4</h1>
+<p class="desc"></p>
+
+<p class="notes">Assumes colors are clamped to [0,255].
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'rgb(-1000000000000000000000000000000000000000, 1000000000000000000000000000000000000000, -1000000000000000000000000000000000000000)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgb-clamp-4.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgb-clamp-4.worker.js
new file mode 100644
index 0000000000..ca5543ac9b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgb-clamp-4.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.rgb-clamp-4
+// Description:
+// Note:<p class="notes">Assumes colors are clamped to [0,255].
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'rgb(-1000000000000000000000000000000000000000, 1000000000000000000000000000000000000000, -1000000000000000000000000000000000000000)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgb-clamp-5.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgb-clamp-5.html
new file mode 100644
index 0000000000..880ad046e1
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgb-clamp-5.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.rgb-clamp-5</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.rgb-clamp-5</h1>
+<p class="desc"></p>
+
+<p class="notes">Assumes colors are clamped to [0,255].
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'rgb(-10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000, 10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000, -10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgb-clamp-5.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgb-clamp-5.worker.js
new file mode 100644
index 0000000000..41f8799f40
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgb-clamp-5.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.rgb-clamp-5
+// Description:
+// Note:<p class="notes">Assumes colors are clamped to [0,255].
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'rgb(-10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000, 10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000, -10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgb-eof.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgb-eof.html
new file mode 100644
index 0000000000..9a84105dbc
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgb-eof.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.rgb-eof</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.rgb-eof</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'rgb(0, 255, 0';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgb-eof.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgb-eof.worker.js
new file mode 100644
index 0000000000..39589937d5
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgb-eof.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.rgb-eof
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'rgb(0, 255, 0';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgb-num.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgb-num.html
new file mode 100644
index 0000000000..6cda83e0a8
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgb-num.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.rgb-num</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.rgb-num</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'rgb(0,255,0)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgb-num.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgb-num.worker.js
new file mode 100644
index 0000000000..229d6aec61
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgb-num.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.rgb-num
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'rgb(0,255,0)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgb-percent.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgb-percent.html
new file mode 100644
index 0000000000..6f7125de0f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgb-percent.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.rgb-percent</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.rgb-percent</h1>
+<p class="desc"></p>
+
+<p class="notes">CSS3 Color says "The integer value 255 corresponds to 100%". (In particular, it is not 254...)
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'rgb(0% ,100% ,0%)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgb-percent.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgb-percent.worker.js
new file mode 100644
index 0000000000..4ba5c987e5
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgb-percent.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.rgb-percent
+// Description:
+// Note:<p class="notes">CSS3 Color says "The integer value 255 corresponds to 100%". (In particular, it is not 254...)
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'rgb(0% ,100% ,0%)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgba-clamp-1.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgba-clamp-1.html
new file mode 100644
index 0000000000..1cf20f7898
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgba-clamp-1.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.rgba-clamp-1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.rgba-clamp-1</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'rgba(0, 255, 0, -2)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,0,0,0);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgba-clamp-1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgba-clamp-1.worker.js
new file mode 100644
index 0000000000..9ba73e22eb
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgba-clamp-1.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.rgba-clamp-1
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'rgba(0, 255, 0, -2)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,0,0,0);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgba-clamp-2.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgba-clamp-2.html
new file mode 100644
index 0000000000..c8b4844ae6
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgba-clamp-2.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.rgba-clamp-2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.rgba-clamp-2</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'rgba(0, 255, 0, 2)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgba-clamp-2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgba-clamp-2.worker.js
new file mode 100644
index 0000000000..fd1c53a733
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgba-clamp-2.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.rgba-clamp-2
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'rgba(0, 255, 0, 2)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgba-eof.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgba-eof.html
new file mode 100644
index 0000000000..d3fd3df2e4
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgba-eof.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.rgba-eof</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.rgba-eof</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'rgba(0, 255, 0, 1';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgba-eof.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgba-eof.worker.js
new file mode 100644
index 0000000000..6e51f09b5f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgba-eof.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.rgba-eof
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'rgba(0, 255, 0, 1';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgba-num-1.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgba-num-1.html
new file mode 100644
index 0000000000..1ce69821ae
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgba-num-1.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.rgba-num-1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.rgba-num-1</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'rgba( 0 , 255 , 0 , .499 )';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,127);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgba-num-1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgba-num-1.worker.js
new file mode 100644
index 0000000000..2805af6e05
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgba-num-1.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.rgba-num-1
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'rgba( 0 , 255 , 0 , .499 )';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,127);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgba-num-2.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgba-num-2.html
new file mode 100644
index 0000000000..979eff66b2
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgba-num-2.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.rgba-num-2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.rgba-num-2</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'rgba( 0 , 255 , 0 , 0.499 )';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,127);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgba-num-2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgba-num-2.worker.js
new file mode 100644
index 0000000000..2ed1549240
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgba-num-2.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.rgba-num-2
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'rgba( 0 , 255 , 0 , 0.499 )';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,127);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgba-percent.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgba-percent.html
new file mode 100644
index 0000000000..2c737e21c1
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgba-percent.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.rgba-percent</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.rgba-percent</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'rgba(0%,100%,0%,0.499)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,127);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgba-percent.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgba-percent.worker.js
new file mode 100644
index 0000000000..5852ea3eb1
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgba-percent.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.rgba-percent
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'rgba(0%,100%,0%,0.499)';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,127);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgba-solid-1.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgba-solid-1.html
new file mode 100644
index 0000000000..701b5efc79
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgba-solid-1.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.rgba-solid-1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.rgba-solid-1</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'rgba( 0 , 255 , 0 , 1 )';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgba-solid-1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgba-solid-1.worker.js
new file mode 100644
index 0000000000..51e6d77421
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgba-solid-1.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.rgba-solid-1
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'rgba( 0 , 255 , 0 , 1 )';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgba-solid-2.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgba-solid-2.html
new file mode 100644
index 0000000000..7280c10dd6
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgba-solid-2.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.rgba-solid-2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.rgba-solid-2</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'rgba( 0 , 255 , 0 , 1.0 )';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgba-solid-2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgba-solid-2.worker.js
new file mode 100644
index 0000000000..4dcbd72aef
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgba-solid-2.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.rgba-solid-2
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'rgba( 0 , 255 , 0 , 1.0 )';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgba-solid-3.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgba-solid-3.html
new file mode 100644
index 0000000000..dfbb443973
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgba-solid-3.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.rgba-solid-3</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.rgba-solid-3</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'rgba( 0 , 255 , 0 , +1 )';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgba-solid-3.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgba-solid-3.worker.js
new file mode 100644
index 0000000000..060fad9bb8
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgba-solid-3.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.rgba-solid-3
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'rgba( 0 , 255 , 0 , +1 )';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgba-solid-4.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgba-solid-4.html
new file mode 100644
index 0000000000..131396c8d0
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgba-solid-4.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.rgba-solid-4</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.rgba-solid-4</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'rgba( -0 , 255 , +0 , 1 )';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgba-solid-4.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgba-solid-4.worker.js
new file mode 100644
index 0000000000..43a8cf8251
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.rgba-solid-4.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.rgba-solid-4
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'rgba( -0 , 255 , +0 , 1 )';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.svg-1.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.svg-1.html
new file mode 100644
index 0000000000..ffcc525b48
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.svg-1.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.svg-1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.svg-1</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'gray';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 128,128,128,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.svg-1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.svg-1.worker.js
new file mode 100644
index 0000000000..86b4f8175d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.svg-1.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.svg-1
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'gray';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 128,128,128,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.svg-2.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.svg-2.html
new file mode 100644
index 0000000000..eafecd0e6d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.svg-2.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.svg-2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.svg-2</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'grey';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 128,128,128,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.svg-2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.svg-2.worker.js
new file mode 100644
index 0000000000..3aa530508e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.svg-2.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.svg-2
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'grey';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 128,128,128,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.system.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.system.html
new file mode 100644
index 0000000000..65a84a78ec
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.system.html
@@ -0,0 +1,30 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.system</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.system</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'ThreeDDarkShadow';
+assert_regexp_match(ctx.fillStyle, /^#(?!(FF0000|ff0000|f00)$)/); // test that it's not red
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.system.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.system.worker.js
new file mode 100644
index 0000000000..8e21145823
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.system.worker.js
@@ -0,0 +1,26 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.system
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'ThreeDDarkShadow';
+assert_regexp_match(ctx.fillStyle, /^#(?!(FF0000|ff0000|f00)$)/); // test that it's not red
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.transparent-1.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.transparent-1.html
new file mode 100644
index 0000000000..98da0c29cd
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.transparent-1.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.transparent-1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.transparent-1</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'transparent';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,0,0,0);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.transparent-1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.transparent-1.worker.js
new file mode 100644
index 0000000000..a934b66c8c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.transparent-1.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.transparent-1
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'transparent';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,0,0,0);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.transparent-2.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.transparent-2.html
new file mode 100644
index 0000000000..cfebe8fc1d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.transparent-2.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.parse.transparent-2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.parse.transparent-2</h1>
+<p class="desc"></p>
+
+<p class="notes">
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'TrAnSpArEnT';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,0,0,0);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.transparent-2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.transparent-2.worker.js
new file mode 100644
index 0000000000..e577bf55dd
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.parse.transparent-2.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.parse.transparent-2
+// Description:
+// Note:<p class="notes">
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+
+ctx.fillStyle = '#f00';
+ctx.fillStyle = 'TrAnSpArEnT';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,0,0,0);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.toStringFunctionCallback.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.toStringFunctionCallback.html
new file mode 100644
index 0000000000..70eb6b1a26
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.toStringFunctionCallback.html
@@ -0,0 +1,40 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.fillStyle.toStringFunctionCallback</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.fillStyle.toStringFunctionCallback</h1>
+<p class="desc">Passing a function in to ctx.fillStyle or ctx.strokeStyle with a toString callback works as specified</p>
+
+
+<script>
+var t = async_test("Passing a function in to ctx.fillStyle or ctx.strokeStyle with a toString callback works as specified");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = { toString: function() { return "#008000"; } };
+_assertSame(ctx.fillStyle, "#008000", "ctx.fillStyle", "\"#008000\"");
+ctx.fillStyle = {};
+_assertSame(ctx.fillStyle, "#008000", "ctx.fillStyle", "\"#008000\"");
+ctx.fillStyle = 800000;
+_assertSame(ctx.fillStyle, "#008000", "ctx.fillStyle", "\"#008000\"");
+assert_throws_js(TypeError, function() { ctx.fillStyle = { toString: function() { throw new TypeError; } }; });
+ctx.strokeStyle = { toString: function() { return "#008000"; } };
+_assertSame(ctx.strokeStyle, "#008000", "ctx.strokeStyle", "\"#008000\"");
+ctx.strokeStyle = {};
+_assertSame(ctx.strokeStyle, "#008000", "ctx.strokeStyle", "\"#008000\"");
+ctx.strokeStyle = 800000;
+_assertSame(ctx.strokeStyle, "#008000", "ctx.strokeStyle", "\"#008000\"");
+assert_throws_js(TypeError, function() { ctx.strokeStyle = { toString: function() { throw new TypeError; } }; });
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.toStringFunctionCallback.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.toStringFunctionCallback.worker.js
new file mode 100644
index 0000000000..68ae0a5da2
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.fillStyle.toStringFunctionCallback.worker.js
@@ -0,0 +1,36 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.fillStyle.toStringFunctionCallback
+// Description:Passing a function in to ctx.fillStyle or ctx.strokeStyle with a toString callback works as specified
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Passing a function in to ctx.fillStyle or ctx.strokeStyle with a toString callback works as specified");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = { toString: function() { return "#008000"; } };
+_assertSame(ctx.fillStyle, "#008000", "ctx.fillStyle", "\"#008000\"");
+ctx.fillStyle = {};
+_assertSame(ctx.fillStyle, "#008000", "ctx.fillStyle", "\"#008000\"");
+ctx.fillStyle = 800000;
+_assertSame(ctx.fillStyle, "#008000", "ctx.fillStyle", "\"#008000\"");
+assert_throws_js(TypeError, function() { ctx.fillStyle = { toString: function() { throw new TypeError; } }; });
+ctx.strokeStyle = { toString: function() { return "#008000"; } };
+_assertSame(ctx.strokeStyle, "#008000", "ctx.strokeStyle", "\"#008000\"");
+ctx.strokeStyle = {};
+_assertSame(ctx.strokeStyle, "#008000", "ctx.strokeStyle", "\"#008000\"");
+ctx.strokeStyle = 800000;
+_assertSame(ctx.strokeStyle, "#008000", "ctx.strokeStyle", "\"#008000\"");
+assert_throws_js(TypeError, function() { ctx.strokeStyle = { toString: function() { throw new TypeError; } }; });
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.conic.invalid.inputs.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.conic.invalid.inputs.html
new file mode 100644
index 0000000000..3d1f21ec05
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.conic.invalid.inputs.html
@@ -0,0 +1,45 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.gradient.conic.invalid.inputs</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.gradient.conic.invalid.inputs</h1>
+<p class="desc">Conic gradient function with invalid inputs</p>
+
+
+<script>
+var t = async_test("Conic gradient function with invalid inputs");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_js(TypeError, function() { ctx.createConicGradient(Infinity, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.createConicGradient(-Infinity, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.createConicGradient(NaN, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.createConicGradient(0, Infinity, 1); });
+assert_throws_js(TypeError, function() { ctx.createConicGradient(0, -Infinity, 1); });
+assert_throws_js(TypeError, function() { ctx.createConicGradient(0, NaN, 1); });
+assert_throws_js(TypeError, function() { ctx.createConicGradient(0, 0, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createConicGradient(0, 0, -Infinity); });
+assert_throws_js(TypeError, function() { ctx.createConicGradient(0, 0, NaN); });
+assert_throws_js(TypeError, function() { ctx.createConicGradient(Infinity, Infinity, 1); });
+assert_throws_js(TypeError, function() { ctx.createConicGradient(Infinity, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createConicGradient(Infinity, 0, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createConicGradient(0, Infinity, Infinity); });
+
+const g = ctx.createConicGradient(0, 0, 25);
+assert_throws_js(TypeError, function() { g.addColorStop(-Infinity, '#f00'); });
+assert_throws_js(TypeError, function() { g.addColorStop(NaN, '#f00'); });
+assert_throws_dom("SYNTAX_ERR", function() { g.addColorStop(0, -Infinity); });
+assert_throws_dom("SYNTAX_ERR", function() { g.addColorStop(0, NaN); });
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.conic.invalid.inputs.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.conic.invalid.inputs.worker.js
new file mode 100644
index 0000000000..b6bd62cbb7
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.conic.invalid.inputs.worker.js
@@ -0,0 +1,41 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.gradient.conic.invalid.inputs
+// Description:Conic gradient function with invalid inputs
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Conic gradient function with invalid inputs");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_js(TypeError, function() { ctx.createConicGradient(Infinity, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.createConicGradient(-Infinity, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.createConicGradient(NaN, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.createConicGradient(0, Infinity, 1); });
+assert_throws_js(TypeError, function() { ctx.createConicGradient(0, -Infinity, 1); });
+assert_throws_js(TypeError, function() { ctx.createConicGradient(0, NaN, 1); });
+assert_throws_js(TypeError, function() { ctx.createConicGradient(0, 0, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createConicGradient(0, 0, -Infinity); });
+assert_throws_js(TypeError, function() { ctx.createConicGradient(0, 0, NaN); });
+assert_throws_js(TypeError, function() { ctx.createConicGradient(Infinity, Infinity, 1); });
+assert_throws_js(TypeError, function() { ctx.createConicGradient(Infinity, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createConicGradient(Infinity, 0, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createConicGradient(0, Infinity, Infinity); });
+
+const g = ctx.createConicGradient(0, 0, 25);
+assert_throws_js(TypeError, function() { g.addColorStop(-Infinity, '#f00'); });
+assert_throws_js(TypeError, function() { g.addColorStop(NaN, '#f00'); });
+assert_throws_dom("SYNTAX_ERR", function() { g.addColorStop(0, -Infinity); });
+assert_throws_dom("SYNTAX_ERR", function() { g.addColorStop(0, NaN); });
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.conic.negative.rotation.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.conic.negative.rotation.html
new file mode 100644
index 0000000000..dde54400e2
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.conic.negative.rotation.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.gradient.conic.negative.rotation</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.gradient.conic.negative.rotation</h1>
+<p class="desc">Conic gradient with negative rotation</p>
+
+
+<script>
+var t = async_test("Conic gradient with negative rotation");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+const g = ctx.createConicGradient(-Math.PI/2, 50, 25);
+// It's red in the upper right region and green on the lower left region
+g.addColorStop(0, "#f00");
+g.addColorStop(0.25, "#0f0");
+g.addColorStop(0.50, "#0f0");
+g.addColorStop(0.75, "#f00");
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 25,15, 255,0,0,255, 3);
+_assertPixelApprox(canvas, 75,40, 0,255,0,255, 3);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.conic.negative.rotation.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.conic.negative.rotation.worker.js
new file mode 100644
index 0000000000..68589cfab5
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.conic.negative.rotation.worker.js
@@ -0,0 +1,32 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.gradient.conic.negative.rotation
+// Description:Conic gradient with negative rotation
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Conic gradient with negative rotation");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+const g = ctx.createConicGradient(-Math.PI/2, 50, 25);
+// It's red in the upper right region and green on the lower left region
+g.addColorStop(0, "#f00");
+g.addColorStop(0.25, "#0f0");
+g.addColorStop(0.50, "#0f0");
+g.addColorStop(0.75, "#f00");
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 25,15, 255,0,0,255, 3);
+_assertPixelApprox(canvas, 75,40, 0,255,0,255, 3);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.conic.positive.rotation.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.conic.positive.rotation.html
new file mode 100644
index 0000000000..42d5a87af4
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.conic.positive.rotation.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.gradient.conic.positive.rotation</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.gradient.conic.positive.rotation</h1>
+<p class="desc">Conic gradient with positive rotation</p>
+
+
+<script>
+var t = async_test("Conic gradient with positive rotation");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+const g = ctx.createConicGradient(3*Math.PI/2, 50, 25);
+// It's red in the upper right region and green on the lower left region
+g.addColorStop(0, "#f00");
+g.addColorStop(0.25, "#0f0");
+g.addColorStop(0.50, "#0f0");
+g.addColorStop(0.75, "#f00");
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 25,15, 255,0,0,255, 3);
+_assertPixelApprox(canvas, 75,40, 0,255,0,255, 3);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.conic.positive.rotation.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.conic.positive.rotation.worker.js
new file mode 100644
index 0000000000..cece603ddb
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.conic.positive.rotation.worker.js
@@ -0,0 +1,32 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.gradient.conic.positive.rotation
+// Description:Conic gradient with positive rotation
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Conic gradient with positive rotation");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+const g = ctx.createConicGradient(3*Math.PI/2, 50, 25);
+// It's red in the upper right region and green on the lower left region
+g.addColorStop(0, "#f00");
+g.addColorStop(0.25, "#0f0");
+g.addColorStop(0.50, "#0f0");
+g.addColorStop(0.75, "#f00");
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 25,15, 255,0,0,255, 3);
+_assertPixelApprox(canvas, 75,40, 0,255,0,255, 3);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.empty.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.empty.html
new file mode 100644
index 0000000000..93229d93f5
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.empty.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.gradient.empty</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.gradient.empty</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+var g = ctx.createLinearGradient(0, 0, 0, 50);
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.empty.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.empty.worker.js
new file mode 100644
index 0000000000..207a1b0cab
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.empty.worker.js
@@ -0,0 +1,28 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.gradient.empty
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+var g = ctx.createLinearGradient(0, 0, 0, 50);
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.alpha.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.alpha.html
new file mode 100644
index 0000000000..52c11fcbfd
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.alpha.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.gradient.interpolate.alpha</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.gradient.interpolate.alpha</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#ff0';
+ctx.fillRect(0, 0, 100, 50);
+var g = ctx.createLinearGradient(0, 0, 100, 0);
+g.addColorStop(0, 'rgba(0,0,255, 0)');
+g.addColorStop(1, 'rgba(0,0,255, 1)');
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 25,25, 191,191,63,255, 3);
+_assertPixelApprox(canvas, 50,25, 127,127,127,255, 3);
+_assertPixelApprox(canvas, 75,25, 63,63,191,255, 3);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.alpha.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.alpha.worker.js
new file mode 100644
index 0000000000..d9f08a9bed
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.alpha.worker.js
@@ -0,0 +1,32 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.gradient.interpolate.alpha
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#ff0';
+ctx.fillRect(0, 0, 100, 50);
+var g = ctx.createLinearGradient(0, 0, 100, 0);
+g.addColorStop(0, 'rgba(0,0,255, 0)');
+g.addColorStop(1, 'rgba(0,0,255, 1)');
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 25,25, 191,191,63,255, 3);
+_assertPixelApprox(canvas, 50,25, 127,127,127,255, 3);
+_assertPixelApprox(canvas, 75,25, 63,63,191,255, 3);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.color.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.color.html
new file mode 100644
index 0000000000..8f32781760
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.color.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.gradient.interpolate.color</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.gradient.interpolate.color</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var g = ctx.createLinearGradient(0, 0, 100, 0);
+g.addColorStop(0, '#ff0');
+g.addColorStop(1, '#00f');
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 25,25, 191,191,63,255, 3);
+_assertPixelApprox(canvas, 50,25, 127,127,127,255, 3);
+_assertPixelApprox(canvas, 75,25, 63,63,191,255, 3);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.color.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.color.worker.js
new file mode 100644
index 0000000000..fcf1f84f37
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.color.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.gradient.interpolate.color
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var g = ctx.createLinearGradient(0, 0, 100, 0);
+g.addColorStop(0, '#ff0');
+g.addColorStop(1, '#00f');
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 25,25, 191,191,63,255, 3);
+_assertPixelApprox(canvas, 50,25, 127,127,127,255, 3);
+_assertPixelApprox(canvas, 75,25, 63,63,191,255, 3);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.coloralpha.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.coloralpha.html
new file mode 100644
index 0000000000..0e7d3b5577
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.coloralpha.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.gradient.interpolate.coloralpha</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.gradient.interpolate.coloralpha</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var g = ctx.createLinearGradient(0, 0, 100, 0);
+g.addColorStop(0, 'rgba(255,255,0, 0)');
+g.addColorStop(1, 'rgba(0,0,255, 1)');
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 25,25, 190,190,65,65, 3);
+_assertPixelApprox(canvas, 50,25, 126,126,128,128, 3);
+_assertPixelApprox(canvas, 75,25, 62,62,192,192, 3);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.coloralpha.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.coloralpha.worker.js
new file mode 100644
index 0000000000..cc1cc9f219
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.coloralpha.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.gradient.interpolate.coloralpha
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var g = ctx.createLinearGradient(0, 0, 100, 0);
+g.addColorStop(0, 'rgba(255,255,0, 0)');
+g.addColorStop(1, 'rgba(0,0,255, 1)');
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 25,25, 190,190,65,65, 3);
+_assertPixelApprox(canvas, 50,25, 126,126,128,128, 3);
+_assertPixelApprox(canvas, 75,25, 62,62,192,192, 3);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.multiple.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.multiple.html
new file mode 100644
index 0000000000..724ae5c093
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.multiple.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.gradient.interpolate.multiple</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.gradient.interpolate.multiple</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+canvas.width = 200;
+var g = ctx.createLinearGradient(0, 0, 200, 0);
+g.addColorStop(0, '#ff0');
+g.addColorStop(0.5, '#0ff');
+g.addColorStop(1, '#f0f');
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 200, 50);
+_assertPixelApprox(canvas, 50,25, 127,255,127,255, 3);
+_assertPixelApprox(canvas, 100,25, 0,255,255,255, 3);
+_assertPixelApprox(canvas, 150,25, 127,127,255,255, 3);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.multiple.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.multiple.worker.js
new file mode 100644
index 0000000000..ff3687c1a9
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.multiple.worker.js
@@ -0,0 +1,32 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.gradient.interpolate.multiple
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+canvas.width = 200;
+var g = ctx.createLinearGradient(0, 0, 200, 0);
+g.addColorStop(0, '#ff0');
+g.addColorStop(0.5, '#0ff');
+g.addColorStop(1, '#f0f');
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 200, 50);
+_assertPixelApprox(canvas, 50,25, 127,255,127,255, 3);
+_assertPixelApprox(canvas, 100,25, 0,255,255,255, 3);
+_assertPixelApprox(canvas, 150,25, 127,127,255,255, 3);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.outside.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.outside.html
new file mode 100644
index 0000000000..0ef97af879
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.outside.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.gradient.interpolate.outside</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.gradient.interpolate.outside</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var g = ctx.createLinearGradient(25, 0, 75, 0);
+g.addColorStop(0.4, '#0f0');
+g.addColorStop(0.6, '#0f0');
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 20,25, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 80,25, 0,255,0,255, 2);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.outside.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.outside.worker.js
new file mode 100644
index 0000000000..60d10a59d8
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.outside.worker.js
@@ -0,0 +1,32 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.gradient.interpolate.outside
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var g = ctx.createLinearGradient(25, 0, 75, 0);
+g.addColorStop(0.4, '#0f0');
+g.addColorStop(0.6, '#0f0');
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 20,25, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 80,25, 0,255,0,255, 2);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.overlap.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.overlap.html
new file mode 100644
index 0000000000..77eb328ecf
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.overlap.html
@@ -0,0 +1,52 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.gradient.interpolate.overlap</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.gradient.interpolate.overlap</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+canvas.width = 200;
+var g = ctx.createLinearGradient(0, 0, 200, 0);
+g.addColorStop(0, '#f00');
+g.addColorStop(0, '#ff0');
+g.addColorStop(0.25, '#00f');
+g.addColorStop(0.25, '#0f0');
+g.addColorStop(0.25, '#0f0');
+g.addColorStop(0.25, '#0f0');
+g.addColorStop(0.25, '#ff0');
+g.addColorStop(0.5, '#00f');
+g.addColorStop(0.5, '#0f0');
+g.addColorStop(0.75, '#00f');
+g.addColorStop(0.75, '#f00');
+g.addColorStop(0.75, '#ff0');
+g.addColorStop(0.5, '#0f0');
+g.addColorStop(0.5, '#0f0');
+g.addColorStop(0.5, '#ff0');
+g.addColorStop(1, '#00f');
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 200, 50);
+_assertPixelApprox(canvas, 49,25, 0,0,255,255, 16);
+_assertPixelApprox(canvas, 51,25, 255,255,0,255, 16);
+_assertPixelApprox(canvas, 99,25, 0,0,255,255, 16);
+_assertPixelApprox(canvas, 101,25, 255,255,0,255, 16);
+_assertPixelApprox(canvas, 149,25, 0,0,255,255, 16);
+_assertPixelApprox(canvas, 151,25, 255,255,0,255, 16);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.overlap.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.overlap.worker.js
new file mode 100644
index 0000000000..e11c85f8d8
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.overlap.worker.js
@@ -0,0 +1,48 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.gradient.interpolate.overlap
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+canvas.width = 200;
+var g = ctx.createLinearGradient(0, 0, 200, 0);
+g.addColorStop(0, '#f00');
+g.addColorStop(0, '#ff0');
+g.addColorStop(0.25, '#00f');
+g.addColorStop(0.25, '#0f0');
+g.addColorStop(0.25, '#0f0');
+g.addColorStop(0.25, '#0f0');
+g.addColorStop(0.25, '#ff0');
+g.addColorStop(0.5, '#00f');
+g.addColorStop(0.5, '#0f0');
+g.addColorStop(0.75, '#00f');
+g.addColorStop(0.75, '#f00');
+g.addColorStop(0.75, '#ff0');
+g.addColorStop(0.5, '#0f0');
+g.addColorStop(0.5, '#0f0');
+g.addColorStop(0.5, '#ff0');
+g.addColorStop(1, '#00f');
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 200, 50);
+_assertPixelApprox(canvas, 49,25, 0,0,255,255, 16);
+_assertPixelApprox(canvas, 51,25, 255,255,0,255, 16);
+_assertPixelApprox(canvas, 99,25, 0,0,255,255, 16);
+_assertPixelApprox(canvas, 101,25, 255,255,0,255, 16);
+_assertPixelApprox(canvas, 149,25, 0,0,255,255, 16);
+_assertPixelApprox(canvas, 151,25, 255,255,0,255, 16);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.overlap2.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.overlap2.html
new file mode 100644
index 0000000000..662913b13f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.overlap2.html
@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.gradient.interpolate.overlap2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.gradient.interpolate.overlap2</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var g = ctx.createLinearGradient(0, 0, 100, 0);
+var ps = [ 0, 1/10, 1/4, 1/3, 1/2, 3/4, 1 ];
+for (var p = 0; p < ps.length; ++p)
+{
+ g.addColorStop(ps[p], '#0f0');
+ for (var i = 0; i < 15; ++i)
+ g.addColorStop(ps[p], '#f00');
+ g.addColorStop(ps[p], '#0f0');
+}
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 1,25, 0,255,0,255);
+_assertPixel(canvas, 30,25, 0,255,0,255);
+_assertPixel(canvas, 40,25, 0,255,0,255);
+_assertPixel(canvas, 60,25, 0,255,0,255);
+_assertPixel(canvas, 80,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.overlap2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.overlap2.worker.js
new file mode 100644
index 0000000000..a6329af99a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.overlap2.worker.js
@@ -0,0 +1,38 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.gradient.interpolate.overlap2
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var g = ctx.createLinearGradient(0, 0, 100, 0);
+var ps = [ 0, 1/10, 1/4, 1/3, 1/2, 3/4, 1 ];
+for (var p = 0; p < ps.length; ++p)
+{
+ g.addColorStop(ps[p], '#0f0');
+ for (var i = 0; i < 15; ++i)
+ g.addColorStop(ps[p], '#f00');
+ g.addColorStop(ps[p], '#0f0');
+}
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 1,25, 0,255,0,255);
+_assertPixel(canvas, 30,25, 0,255,0,255);
+_assertPixel(canvas, 40,25, 0,255,0,255);
+_assertPixel(canvas, 60,25, 0,255,0,255);
+_assertPixel(canvas, 80,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.solid.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.solid.html
new file mode 100644
index 0000000000..aa488d9412
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.solid.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.gradient.interpolate.solid</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.gradient.interpolate.solid</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var g = ctx.createLinearGradient(0, 0, 100, 0);
+g.addColorStop(0, '#0f0');
+g.addColorStop(1, '#0f0');
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.solid.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.solid.worker.js
new file mode 100644
index 0000000000..8cc4a88d98
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.solid.worker.js
@@ -0,0 +1,28 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.gradient.interpolate.solid
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var g = ctx.createLinearGradient(0, 0, 100, 0);
+g.addColorStop(0, '#0f0');
+g.addColorStop(1, '#0f0');
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.vertical.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.vertical.html
new file mode 100644
index 0000000000..15c4c7c39e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.vertical.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.gradient.interpolate.vertical</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.gradient.interpolate.vertical</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var g = ctx.createLinearGradient(0, 0, 0, 50);
+g.addColorStop(0, '#ff0');
+g.addColorStop(1, '#00f');
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 50,12, 191,191,63,255, 10);
+_assertPixelApprox(canvas, 50,25, 127,127,127,255, 5);
+_assertPixelApprox(canvas, 50,37, 63,63,191,255, 10);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.vertical.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.vertical.worker.js
new file mode 100644
index 0000000000..a25692cf42
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.vertical.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.gradient.interpolate.vertical
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var g = ctx.createLinearGradient(0, 0, 0, 50);
+g.addColorStop(0, '#ff0');
+g.addColorStop(1, '#00f');
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 50,12, 191,191,63,255, 10);
+_assertPixelApprox(canvas, 50,25, 127,127,127,255, 5);
+_assertPixelApprox(canvas, 50,37, 63,63,191,255, 10);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.zerosize.fill.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.zerosize.fill.html
new file mode 100644
index 0000000000..b679d5b83d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.zerosize.fill.html
@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.gradient.interpolate.zerosize.fill</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.gradient.interpolate.zerosize.fill</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+var g = ctx.createLinearGradient(50, 25, 50, 25); // zero-length line (undefined direction)
+g.addColorStop(0, '#f00');
+g.addColorStop(1, '#f00');
+ctx.fillStyle = g;
+ctx.rect(0, 0, 100, 50);
+ctx.fill();
+_assertPixel(canvas, 40,20, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.zerosize.fill.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.zerosize.fill.worker.js
new file mode 100644
index 0000000000..71df9674ce
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.zerosize.fill.worker.js
@@ -0,0 +1,31 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.gradient.interpolate.zerosize.fill
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+var g = ctx.createLinearGradient(50, 25, 50, 25); // zero-length line (undefined direction)
+g.addColorStop(0, '#f00');
+g.addColorStop(1, '#f00');
+ctx.fillStyle = g;
+ctx.rect(0, 0, 100, 50);
+ctx.fill();
+_assertPixel(canvas, 40,20, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.zerosize.fillRect.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.zerosize.fillRect.html
new file mode 100644
index 0000000000..9576f2a99e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.zerosize.fillRect.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.gradient.interpolate.zerosize.fillRect</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.gradient.interpolate.zerosize.fillRect</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+var g = ctx.createLinearGradient(50, 25, 50, 25); // zero-length line (undefined direction)
+g.addColorStop(0, '#f00');
+g.addColorStop(1, '#f00');
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 40,20, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.zerosize.fillRect.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.zerosize.fillRect.worker.js
new file mode 100644
index 0000000000..b6dfbf081c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.zerosize.fillRect.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.gradient.interpolate.zerosize.fillRect
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+var g = ctx.createLinearGradient(50, 25, 50, 25); // zero-length line (undefined direction)
+g.addColorStop(0, '#f00');
+g.addColorStop(1, '#f00');
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 40,20, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.zerosize.stroke.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.zerosize.stroke.html
new file mode 100644
index 0000000000..81a5e4e35d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.zerosize.stroke.html
@@ -0,0 +1,43 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.gradient.interpolate.zerosize.stroke</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.gradient.interpolate.zerosize.stroke</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+var g = ctx.createLinearGradient(50, 25, 50, 25); // zero-length line (undefined direction)
+g.addColorStop(0, '#f00');
+g.addColorStop(1, '#f00');
+ctx.strokeStyle = g;
+ctx.rect(20, 20, 60, 10);
+ctx.stroke();
+_assertPixel(canvas, 19,19, 0,255,0,255);
+_assertPixel(canvas, 20,19, 0,255,0,255);
+_assertPixel(canvas, 21,19, 0,255,0,255);
+_assertPixel(canvas, 19,20, 0,255,0,255);
+_assertPixel(canvas, 20,20, 0,255,0,255);
+_assertPixel(canvas, 21,20, 0,255,0,255);
+_assertPixel(canvas, 19,21, 0,255,0,255);
+_assertPixel(canvas, 20,21, 0,255,0,255);
+_assertPixel(canvas, 21,21, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.zerosize.stroke.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.zerosize.stroke.worker.js
new file mode 100644
index 0000000000..c8744645a0
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.zerosize.stroke.worker.js
@@ -0,0 +1,39 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.gradient.interpolate.zerosize.stroke
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+var g = ctx.createLinearGradient(50, 25, 50, 25); // zero-length line (undefined direction)
+g.addColorStop(0, '#f00');
+g.addColorStop(1, '#f00');
+ctx.strokeStyle = g;
+ctx.rect(20, 20, 60, 10);
+ctx.stroke();
+_assertPixel(canvas, 19,19, 0,255,0,255);
+_assertPixel(canvas, 20,19, 0,255,0,255);
+_assertPixel(canvas, 21,19, 0,255,0,255);
+_assertPixel(canvas, 19,20, 0,255,0,255);
+_assertPixel(canvas, 20,20, 0,255,0,255);
+_assertPixel(canvas, 21,20, 0,255,0,255);
+_assertPixel(canvas, 19,21, 0,255,0,255);
+_assertPixel(canvas, 20,21, 0,255,0,255);
+_assertPixel(canvas, 21,21, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.zerosize.strokeRect.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.zerosize.strokeRect.html
new file mode 100644
index 0000000000..91cedc7069
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.zerosize.strokeRect.html
@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.gradient.interpolate.zerosize.strokeRect</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.gradient.interpolate.zerosize.strokeRect</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+var g = ctx.createLinearGradient(50, 25, 50, 25); // zero-length line (undefined direction)
+g.addColorStop(0, '#f00');
+g.addColorStop(1, '#f00');
+ctx.strokeStyle = g;
+ctx.strokeRect(20, 20, 60, 10);
+_assertPixel(canvas, 19,19, 0,255,0,255);
+_assertPixel(canvas, 20,19, 0,255,0,255);
+_assertPixel(canvas, 21,19, 0,255,0,255);
+_assertPixel(canvas, 19,20, 0,255,0,255);
+_assertPixel(canvas, 20,20, 0,255,0,255);
+_assertPixel(canvas, 21,20, 0,255,0,255);
+_assertPixel(canvas, 19,21, 0,255,0,255);
+_assertPixel(canvas, 20,21, 0,255,0,255);
+_assertPixel(canvas, 21,21, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.zerosize.strokeRect.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.zerosize.strokeRect.worker.js
new file mode 100644
index 0000000000..0949fc8a19
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.interpolate.zerosize.strokeRect.worker.js
@@ -0,0 +1,38 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.gradient.interpolate.zerosize.strokeRect
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+var g = ctx.createLinearGradient(50, 25, 50, 25); // zero-length line (undefined direction)
+g.addColorStop(0, '#f00');
+g.addColorStop(1, '#f00');
+ctx.strokeStyle = g;
+ctx.strokeRect(20, 20, 60, 10);
+_assertPixel(canvas, 19,19, 0,255,0,255);
+_assertPixel(canvas, 20,19, 0,255,0,255);
+_assertPixel(canvas, 21,19, 0,255,0,255);
+_assertPixel(canvas, 19,20, 0,255,0,255);
+_assertPixel(canvas, 20,20, 0,255,0,255);
+_assertPixel(canvas, 21,20, 0,255,0,255);
+_assertPixel(canvas, 19,21, 0,255,0,255);
+_assertPixel(canvas, 20,21, 0,255,0,255);
+_assertPixel(canvas, 21,21, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.linear.nonfinite.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.linear.nonfinite.html
new file mode 100644
index 0000000000..f3c4209be7
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.linear.nonfinite.html
@@ -0,0 +1,49 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.gradient.linear.nonfinite</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.gradient.linear.nonfinite</h1>
+<p class="desc">createLinearGradient() throws TypeError if arguments are not finite</p>
+
+
+<script>
+var t = async_test("createLinearGradient() throws TypeError if arguments are not finite");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(Infinity, 0, 1, 0); });
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(-Infinity, 0, 1, 0); });
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(NaN, 0, 1, 0); });
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(0, Infinity, 1, 0); });
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(0, -Infinity, 1, 0); });
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(0, NaN, 1, 0); });
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(0, 0, Infinity, 0); });
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(0, 0, -Infinity, 0); });
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(0, 0, NaN, 0); });
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(0, 0, 1, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(0, 0, 1, -Infinity); });
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(0, 0, 1, NaN); });
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(Infinity, Infinity, 1, 0); });
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(Infinity, Infinity, Infinity, 0); });
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(Infinity, Infinity, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(Infinity, Infinity, 1, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(Infinity, 0, Infinity, 0); });
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(Infinity, 0, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(Infinity, 0, 1, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(0, Infinity, Infinity, 0); });
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(0, Infinity, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(0, Infinity, 1, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(0, 0, Infinity, Infinity); });
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.linear.nonfinite.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.linear.nonfinite.worker.js
new file mode 100644
index 0000000000..9fefcc3215
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.linear.nonfinite.worker.js
@@ -0,0 +1,45 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.gradient.linear.nonfinite
+// Description:createLinearGradient() throws TypeError if arguments are not finite
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("createLinearGradient() throws TypeError if arguments are not finite");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(Infinity, 0, 1, 0); });
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(-Infinity, 0, 1, 0); });
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(NaN, 0, 1, 0); });
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(0, Infinity, 1, 0); });
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(0, -Infinity, 1, 0); });
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(0, NaN, 1, 0); });
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(0, 0, Infinity, 0); });
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(0, 0, -Infinity, 0); });
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(0, 0, NaN, 0); });
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(0, 0, 1, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(0, 0, 1, -Infinity); });
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(0, 0, 1, NaN); });
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(Infinity, Infinity, 1, 0); });
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(Infinity, Infinity, Infinity, 0); });
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(Infinity, Infinity, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(Infinity, Infinity, 1, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(Infinity, 0, Infinity, 0); });
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(Infinity, 0, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(Infinity, 0, 1, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(0, Infinity, Infinity, 0); });
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(0, Infinity, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(0, Infinity, 1, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createLinearGradient(0, 0, Infinity, Infinity); });
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.linear.transform.1.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.linear.transform.1.html
new file mode 100644
index 0000000000..5e79107907
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.linear.transform.1.html
@@ -0,0 +1,37 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.gradient.linear.transform.1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.gradient.linear.transform.1</h1>
+<p class="desc">Linear gradient coordinates are relative to the coordinate space at the time of filling</p>
+
+
+<script>
+var t = async_test("Linear gradient coordinates are relative to the coordinate space at the time of filling");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var g = ctx.createLinearGradient(0, 0, 200, 0);
+g.addColorStop(0, '#f00');
+g.addColorStop(0.25, '#0f0');
+g.addColorStop(0.75, '#0f0');
+g.addColorStop(1, '#f00');
+ctx.fillStyle = g;
+ctx.translate(-50, 0);
+ctx.fillRect(50, 0, 100, 50);
+_assertPixel(canvas, 25,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 75,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.linear.transform.1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.linear.transform.1.worker.js
new file mode 100644
index 0000000000..62a96e2f67
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.linear.transform.1.worker.js
@@ -0,0 +1,33 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.gradient.linear.transform.1
+// Description:Linear gradient coordinates are relative to the coordinate space at the time of filling
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Linear gradient coordinates are relative to the coordinate space at the time of filling");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var g = ctx.createLinearGradient(0, 0, 200, 0);
+g.addColorStop(0, '#f00');
+g.addColorStop(0.25, '#0f0');
+g.addColorStop(0.75, '#0f0');
+g.addColorStop(1, '#f00');
+ctx.fillStyle = g;
+ctx.translate(-50, 0);
+ctx.fillRect(50, 0, 100, 50);
+_assertPixel(canvas, 25,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 75,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.linear.transform.2.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.linear.transform.2.html
new file mode 100644
index 0000000000..86fb507334
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.linear.transform.2.html
@@ -0,0 +1,38 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.gradient.linear.transform.2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.gradient.linear.transform.2</h1>
+<p class="desc">Linear gradient coordinates are relative to the coordinate space at the time of filling</p>
+
+
+<script>
+var t = async_test("Linear gradient coordinates are relative to the coordinate space at the time of filling");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.translate(100, 0);
+var g = ctx.createLinearGradient(0, 0, 200, 0);
+g.addColorStop(0, '#f00');
+g.addColorStop(0.25, '#0f0');
+g.addColorStop(0.75, '#0f0');
+g.addColorStop(1, '#f00');
+ctx.fillStyle = g;
+ctx.translate(-150, 0);
+ctx.fillRect(50, 0, 100, 50);
+_assertPixel(canvas, 25,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 75,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.linear.transform.2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.linear.transform.2.worker.js
new file mode 100644
index 0000000000..dace251811
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.linear.transform.2.worker.js
@@ -0,0 +1,34 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.gradient.linear.transform.2
+// Description:Linear gradient coordinates are relative to the coordinate space at the time of filling
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Linear gradient coordinates are relative to the coordinate space at the time of filling");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.translate(100, 0);
+var g = ctx.createLinearGradient(0, 0, 200, 0);
+g.addColorStop(0, '#f00');
+g.addColorStop(0.25, '#0f0');
+g.addColorStop(0.75, '#0f0');
+g.addColorStop(1, '#f00');
+ctx.fillStyle = g;
+ctx.translate(-150, 0);
+ctx.fillRect(50, 0, 100, 50);
+_assertPixel(canvas, 25,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 75,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.linear.transform.3.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.linear.transform.3.html
new file mode 100644
index 0000000000..ccbc3ab283
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.linear.transform.3.html
@@ -0,0 +1,38 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.gradient.linear.transform.3</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.gradient.linear.transform.3</h1>
+<p class="desc">Linear gradient transforms do not experience broken caching effects</p>
+
+
+<script>
+var t = async_test("Linear gradient transforms do not experience broken caching effects");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var g = ctx.createLinearGradient(0, 0, 200, 0);
+g.addColorStop(0, '#f00');
+g.addColorStop(0.25, '#0f0');
+g.addColorStop(0.75, '#0f0');
+g.addColorStop(1, '#f00');
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+ctx.translate(-50, 0);
+ctx.fillRect(50, 0, 100, 50);
+_assertPixel(canvas, 25,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 75,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.linear.transform.3.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.linear.transform.3.worker.js
new file mode 100644
index 0000000000..8f5a7115ec
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.linear.transform.3.worker.js
@@ -0,0 +1,34 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.gradient.linear.transform.3
+// Description:Linear gradient transforms do not experience broken caching effects
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Linear gradient transforms do not experience broken caching effects");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var g = ctx.createLinearGradient(0, 0, 200, 0);
+g.addColorStop(0, '#f00');
+g.addColorStop(0.25, '#0f0');
+g.addColorStop(0.75, '#0f0');
+g.addColorStop(1, '#f00');
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+ctx.translate(-50, 0);
+ctx.fillRect(50, 0, 100, 50);
+_assertPixel(canvas, 25,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 75,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.object.compare.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.object.compare.html
new file mode 100644
index 0000000000..a091c32b2c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.object.compare.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.gradient.object.compare</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.gradient.object.compare</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var g1 = ctx.createLinearGradient(0, 0, 100, 0);
+var g2 = ctx.createLinearGradient(0, 0, 100, 0);
+_assertDifferent(g1, g2, "g1", "g2");
+ctx.fillStyle = g1;
+_assertSame(ctx.fillStyle, g1, "ctx.fillStyle", "g1");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.object.compare.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.object.compare.worker.js
new file mode 100644
index 0000000000..6c69e1ad35
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.object.compare.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.gradient.object.compare
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var g1 = ctx.createLinearGradient(0, 0, 100, 0);
+var g2 = ctx.createLinearGradient(0, 0, 100, 0);
+_assertDifferent(g1, g2, "g1", "g2");
+ctx.fillStyle = g1;
+_assertSame(ctx.fillStyle, g1, "ctx.fillStyle", "g1");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.object.crosscanvas.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.object.crosscanvas.html
new file mode 100644
index 0000000000..8d54f95f72
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.object.crosscanvas.html
@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.gradient.object.crosscanvas</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.gradient.object.crosscanvas</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+var g = offscreenCanvas2.getContext('2d').createLinearGradient(0, 0, 100, 0);
+g.addColorStop(0, '#0f0');
+g.addColorStop(1, '#0f0');
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.object.crosscanvas.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.object.crosscanvas.worker.js
new file mode 100644
index 0000000000..fa8cee44ca
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.object.crosscanvas.worker.js
@@ -0,0 +1,31 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.gradient.object.crosscanvas
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+var g = offscreenCanvas2.getContext('2d').createLinearGradient(0, 0, 100, 0);
+g.addColorStop(0, '#0f0');
+g.addColorStop(1, '#0f0');
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.object.invalidcolor.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.object.invalidcolor.html
new file mode 100644
index 0000000000..e812278155
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.object.invalidcolor.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.gradient.object.invalidcolor</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.gradient.object.invalidcolor</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var g = ctx.createLinearGradient(0, 0, 100, 0);
+assert_throws_dom("SYNTAX_ERR", function() { g.addColorStop(0, ""); });
+assert_throws_dom("SYNTAX_ERR", function() { g.addColorStop(0, 'null'); });
+assert_throws_dom("SYNTAX_ERR", function() { g.addColorStop(0, 'undefined'); });
+assert_throws_dom("SYNTAX_ERR", function() { g.addColorStop(0, null); });
+assert_throws_dom("SYNTAX_ERR", function() { g.addColorStop(0, undefined); });
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.object.invalidcolor.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.object.invalidcolor.worker.js
new file mode 100644
index 0000000000..278df5a0d1
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.object.invalidcolor.worker.js
@@ -0,0 +1,28 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.gradient.object.invalidcolor
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var g = ctx.createLinearGradient(0, 0, 100, 0);
+assert_throws_dom("SYNTAX_ERR", function() { g.addColorStop(0, ""); });
+assert_throws_dom("SYNTAX_ERR", function() { g.addColorStop(0, 'null'); });
+assert_throws_dom("SYNTAX_ERR", function() { g.addColorStop(0, 'undefined'); });
+assert_throws_dom("SYNTAX_ERR", function() { g.addColorStop(0, null); });
+assert_throws_dom("SYNTAX_ERR", function() { g.addColorStop(0, undefined); });
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.object.invalidoffset.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.object.invalidoffset.html
new file mode 100644
index 0000000000..bba405069c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.object.invalidoffset.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.gradient.object.invalidoffset</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.gradient.object.invalidoffset</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var g = ctx.createLinearGradient(0, 0, 100, 0);
+assert_throws_dom("INDEX_SIZE_ERR", function() { g.addColorStop(-1, '#000'); });
+assert_throws_dom("INDEX_SIZE_ERR", function() { g.addColorStop(2, '#000'); });
+assert_throws_js(TypeError, function() { g.addColorStop(Infinity, '#000'); });
+assert_throws_js(TypeError, function() { g.addColorStop(-Infinity, '#000'); });
+assert_throws_js(TypeError, function() { g.addColorStop(NaN, '#000'); });
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.object.invalidoffset.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.object.invalidoffset.worker.js
new file mode 100644
index 0000000000..f71c8402eb
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.object.invalidoffset.worker.js
@@ -0,0 +1,28 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.gradient.object.invalidoffset
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var g = ctx.createLinearGradient(0, 0, 100, 0);
+assert_throws_dom("INDEX_SIZE_ERR", function() { g.addColorStop(-1, '#000'); });
+assert_throws_dom("INDEX_SIZE_ERR", function() { g.addColorStop(2, '#000'); });
+assert_throws_js(TypeError, function() { g.addColorStop(Infinity, '#000'); });
+assert_throws_js(TypeError, function() { g.addColorStop(-Infinity, '#000'); });
+assert_throws_js(TypeError, function() { g.addColorStop(NaN, '#000'); });
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.object.update.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.object.update.html
new file mode 100644
index 0000000000..05f8e747f2
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.object.update.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.gradient.object.update</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.gradient.object.update</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var g = ctx.createLinearGradient(-100, 0, 200, 0);
+g.addColorStop(0, '#f00');
+g.addColorStop(1, '#f00');
+ctx.fillStyle = g;
+g.addColorStop(0.1, '#0f0');
+g.addColorStop(0.9, '#0f0');
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.object.update.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.object.update.worker.js
new file mode 100644
index 0000000000..5960d0afe9
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.object.update.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.gradient.object.update
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var g = ctx.createLinearGradient(-100, 0, 200, 0);
+g.addColorStop(0, '#f00');
+g.addColorStop(1, '#f00');
+ctx.fillStyle = g;
+g.addColorStop(0.1, '#0f0');
+g.addColorStop(0.9, '#0f0');
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.cone.behind.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.cone.behind.html
new file mode 100644
index 0000000000..537f960d8d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.cone.behind.html
@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.gradient.radial.cone.behind</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.gradient.radial.cone.behind</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+var g = ctx.createRadialGradient(120, 25, 10, 211, 25, 100);
+g.addColorStop(0, '#f00');
+g.addColorStop(1, '#f00');
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 50,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 98,25, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 50,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.cone.behind.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.cone.behind.worker.js
new file mode 100644
index 0000000000..99711c732d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.cone.behind.worker.js
@@ -0,0 +1,38 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.gradient.radial.cone.behind
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+var g = ctx.createRadialGradient(120, 25, 10, 211, 25, 100);
+g.addColorStop(0, '#f00');
+g.addColorStop(1, '#f00');
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 50,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 98,25, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 50,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.cone.beside.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.cone.beside.html
new file mode 100644
index 0000000000..360f1ab735
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.cone.beside.html
@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.gradient.radial.cone.beside</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.gradient.radial.cone.beside</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+var g = ctx.createRadialGradient(0, 100, 40, 100, 100, 50);
+g.addColorStop(0, '#f00');
+g.addColorStop(1, '#f00');
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 50,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 98,25, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 50,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.cone.beside.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.cone.beside.worker.js
new file mode 100644
index 0000000000..6af48259a3
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.cone.beside.worker.js
@@ -0,0 +1,38 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.gradient.radial.cone.beside
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+var g = ctx.createRadialGradient(0, 100, 40, 100, 100, 50);
+g.addColorStop(0, '#f00');
+g.addColorStop(1, '#f00');
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 50,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 98,25, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 50,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.cone.bottom.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.cone.bottom.html
new file mode 100644
index 0000000000..3f3690381d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.cone.bottom.html
@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.gradient.radial.cone.bottom</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.gradient.radial.cone.bottom</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var g = ctx.createRadialGradient(210, 25, 100, 230, 25, 101);
+g.addColorStop(0, '#0f0');
+g.addColorStop(1, '#f00');
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 50,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 98,25, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 50,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.cone.bottom.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.cone.bottom.worker.js
new file mode 100644
index 0000000000..2eca2d573e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.cone.bottom.worker.js
@@ -0,0 +1,38 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.gradient.radial.cone.bottom
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var g = ctx.createRadialGradient(210, 25, 100, 230, 25, 101);
+g.addColorStop(0, '#0f0');
+g.addColorStop(1, '#f00');
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 50,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 98,25, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 50,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.cone.cylinder.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.cone.cylinder.html
new file mode 100644
index 0000000000..700740938c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.cone.cylinder.html
@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.gradient.radial.cone.cylinder</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.gradient.radial.cone.cylinder</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var g = ctx.createRadialGradient(210, 25, 100, 230, 25, 100);
+g.addColorStop(0, '#0f0');
+g.addColorStop(1, '#f00');
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 50,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 98,25, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 50,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.cone.cylinder.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.cone.cylinder.worker.js
new file mode 100644
index 0000000000..25ff9b861d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.cone.cylinder.worker.js
@@ -0,0 +1,38 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.gradient.radial.cone.cylinder
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var g = ctx.createRadialGradient(210, 25, 100, 230, 25, 100);
+g.addColorStop(0, '#0f0');
+g.addColorStop(1, '#f00');
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 50,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 98,25, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 50,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.cone.front.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.cone.front.html
new file mode 100644
index 0000000000..12f14ce005
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.cone.front.html
@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.gradient.radial.cone.front</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.gradient.radial.cone.front</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var g = ctx.createRadialGradient(311, 25, 10, 210, 25, 100);
+g.addColorStop(0, '#f00');
+g.addColorStop(1, '#0f0');
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 50,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 98,25, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 50,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.cone.front.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.cone.front.worker.js
new file mode 100644
index 0000000000..6053cb40d1
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.cone.front.worker.js
@@ -0,0 +1,38 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.gradient.radial.cone.front
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var g = ctx.createRadialGradient(311, 25, 10, 210, 25, 100);
+g.addColorStop(0, '#f00');
+g.addColorStop(1, '#0f0');
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 50,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 98,25, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 50,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.cone.shape1.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.cone.shape1.html
new file mode 100644
index 0000000000..242aaa0128
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.cone.shape1.html
@@ -0,0 +1,49 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.gradient.radial.cone.shape1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.gradient.radial.cone.shape1</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var tol = 1; // tolerance to avoid antialiasing artifacts
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.beginPath();
+ctx.moveTo(30+tol, 40);
+ctx.lineTo(110, -20+tol);
+ctx.lineTo(110, 100-tol);
+ctx.fill();
+var g = ctx.createRadialGradient(30+10*5/2, 40, 10*3/2, 30+10*15/4, 40, 10*9/4);
+g.addColorStop(0, '#0f0');
+g.addColorStop(1, '#0f0');
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 50,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 98,25, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 50,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.cone.shape1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.cone.shape1.worker.js
new file mode 100644
index 0000000000..15e7a6f696
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.cone.shape1.worker.js
@@ -0,0 +1,45 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.gradient.radial.cone.shape1
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var tol = 1; // tolerance to avoid antialiasing artifacts
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.beginPath();
+ctx.moveTo(30+tol, 40);
+ctx.lineTo(110, -20+tol);
+ctx.lineTo(110, 100-tol);
+ctx.fill();
+var g = ctx.createRadialGradient(30+10*5/2, 40, 10*3/2, 30+10*15/4, 40, 10*9/4);
+g.addColorStop(0, '#0f0');
+g.addColorStop(1, '#0f0');
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 50,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 98,25, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 50,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.cone.shape2.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.cone.shape2.html
new file mode 100644
index 0000000000..d51a132f82
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.cone.shape2.html
@@ -0,0 +1,49 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.gradient.radial.cone.shape2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.gradient.radial.cone.shape2</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var tol = 1; // tolerance to avoid antialiasing artifacts
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+var g = ctx.createRadialGradient(30+10*5/2, 40, 10*3/2, 30+10*15/4, 40, 10*9/4);
+g.addColorStop(0, '#f00');
+g.addColorStop(1, '#f00');
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.beginPath();
+ctx.moveTo(30-tol, 40);
+ctx.lineTo(110, -20-tol);
+ctx.lineTo(110, 100+tol);
+ctx.fill();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 50,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 98,25, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 50,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.cone.shape2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.cone.shape2.worker.js
new file mode 100644
index 0000000000..793d2513dd
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.cone.shape2.worker.js
@@ -0,0 +1,45 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.gradient.radial.cone.shape2
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var tol = 1; // tolerance to avoid antialiasing artifacts
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+var g = ctx.createRadialGradient(30+10*5/2, 40, 10*3/2, 30+10*15/4, 40, 10*9/4);
+g.addColorStop(0, '#f00');
+g.addColorStop(1, '#f00');
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.beginPath();
+ctx.moveTo(30-tol, 40);
+ctx.lineTo(110, -20-tol);
+ctx.lineTo(110, 100+tol);
+ctx.fill();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 50,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 98,25, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 50,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.cone.top.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.cone.top.html
new file mode 100644
index 0000000000..9759eb3fa9
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.cone.top.html
@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.gradient.radial.cone.top</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.gradient.radial.cone.top</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var g = ctx.createRadialGradient(230, 25, 100, 100, 25, 101);
+g.addColorStop(0, '#f00');
+g.addColorStop(1, '#0f0');
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 50,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 98,25, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 50,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.cone.top.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.cone.top.worker.js
new file mode 100644
index 0000000000..2ee6de3479
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.cone.top.worker.js
@@ -0,0 +1,38 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.gradient.radial.cone.top
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var g = ctx.createRadialGradient(230, 25, 100, 100, 25, 101);
+g.addColorStop(0, '#f00');
+g.addColorStop(1, '#0f0');
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 50,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 98,25, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 50,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.equal.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.equal.html
new file mode 100644
index 0000000000..465ee976fa
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.equal.html
@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.gradient.radial.equal</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.gradient.radial.equal</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+var g = ctx.createRadialGradient(50, 25, 20, 50, 25, 20);
+g.addColorStop(0, '#f00');
+g.addColorStop(1, '#f00');
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 50,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 98,25, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 50,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.equal.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.equal.worker.js
new file mode 100644
index 0000000000..74567335b4
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.equal.worker.js
@@ -0,0 +1,38 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.gradient.radial.equal
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+var g = ctx.createRadialGradient(50, 25, 20, 50, 25, 20);
+g.addColorStop(0, '#f00');
+g.addColorStop(1, '#f00');
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 50,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 98,25, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 50,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.inside1.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.inside1.html
new file mode 100644
index 0000000000..7c6fd31d67
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.inside1.html
@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.gradient.radial.inside1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.gradient.radial.inside1</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var g = ctx.createRadialGradient(50, 25, 100, 50, 25, 200);
+g.addColorStop(0, '#0f0');
+g.addColorStop(1, '#f00');
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 50,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 98,25, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 50,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.inside1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.inside1.worker.js
new file mode 100644
index 0000000000..6d73c0935a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.inside1.worker.js
@@ -0,0 +1,38 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.gradient.radial.inside1
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var g = ctx.createRadialGradient(50, 25, 100, 50, 25, 200);
+g.addColorStop(0, '#0f0');
+g.addColorStop(1, '#f00');
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 50,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 98,25, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 50,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.inside2.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.inside2.html
new file mode 100644
index 0000000000..fbad8b57b5
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.inside2.html
@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.gradient.radial.inside2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.gradient.radial.inside2</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var g = ctx.createRadialGradient(50, 25, 200, 50, 25, 100);
+g.addColorStop(0, '#f00');
+g.addColorStop(1, '#0f0');
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 50,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 98,25, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 50,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.inside2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.inside2.worker.js
new file mode 100644
index 0000000000..aa6ecba5f4
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.inside2.worker.js
@@ -0,0 +1,38 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.gradient.radial.inside2
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var g = ctx.createRadialGradient(50, 25, 200, 50, 25, 100);
+g.addColorStop(0, '#f00');
+g.addColorStop(1, '#0f0');
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 50,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 98,25, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 50,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.inside3.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.inside3.html
new file mode 100644
index 0000000000..54794b13fc
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.inside3.html
@@ -0,0 +1,43 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.gradient.radial.inside3</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.gradient.radial.inside3</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var g = ctx.createRadialGradient(50, 25, 200, 50, 25, 100);
+g.addColorStop(0, '#f00');
+g.addColorStop(0.993, '#f00');
+g.addColorStop(1, '#0f0');
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 50,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 98,25, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 50,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.inside3.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.inside3.worker.js
new file mode 100644
index 0000000000..b6d58b656c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.inside3.worker.js
@@ -0,0 +1,39 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.gradient.radial.inside3
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var g = ctx.createRadialGradient(50, 25, 200, 50, 25, 100);
+g.addColorStop(0, '#f00');
+g.addColorStop(0.993, '#f00');
+g.addColorStop(1, '#0f0');
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 50,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 98,25, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 50,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.negative.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.negative.html
new file mode 100644
index 0000000000..1fb6af5228
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.negative.html
@@ -0,0 +1,29 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.gradient.radial.negative</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.gradient.radial.negative</h1>
+<p class="desc">createRadialGradient() throws INDEX_SIZE_ERR if either radius is negative</p>
+
+
+<script>
+var t = async_test("createRadialGradient() throws INDEX_SIZE_ERR if either radius is negative");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_dom("INDEX_SIZE_ERR", function() { ctx.createRadialGradient(0, 0, -0.1, 0, 0, 1); });
+assert_throws_dom("INDEX_SIZE_ERR", function() { ctx.createRadialGradient(0, 0, 1, 0, 0, -0.1); });
+assert_throws_dom("INDEX_SIZE_ERR", function() { ctx.createRadialGradient(0, 0, -0.1, 0, 0, -0.1); });
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.negative.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.negative.worker.js
new file mode 100644
index 0000000000..e0d2c7cc33
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.negative.worker.js
@@ -0,0 +1,25 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.gradient.radial.negative
+// Description:createRadialGradient() throws INDEX_SIZE_ERR if either radius is negative
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("createRadialGradient() throws INDEX_SIZE_ERR if either radius is negative");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_dom("INDEX_SIZE_ERR", function() { ctx.createRadialGradient(0, 0, -0.1, 0, 0, 1); });
+assert_throws_dom("INDEX_SIZE_ERR", function() { ctx.createRadialGradient(0, 0, 1, 0, 0, -0.1); });
+assert_throws_dom("INDEX_SIZE_ERR", function() { ctx.createRadialGradient(0, 0, -0.1, 0, 0, -0.1); });
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.nonfinite.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.nonfinite.html
new file mode 100644
index 0000000000..75ab5740db
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.nonfinite.html
@@ -0,0 +1,101 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.gradient.radial.nonfinite</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.gradient.radial.nonfinite</h1>
+<p class="desc">createRadialGradient() throws TypeError if arguments are not finite</p>
+
+
+<script>
+var t = async_test("createRadialGradient() throws TypeError if arguments are not finite");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, 0, 1, 0, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(-Infinity, 0, 1, 0, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(NaN, 0, 1, 0, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, Infinity, 1, 0, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, -Infinity, 1, 0, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, NaN, 1, 0, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0, Infinity, 0, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0, -Infinity, 0, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0, NaN, 0, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0, 1, Infinity, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0, 1, -Infinity, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0, 1, NaN, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0, 1, 0, Infinity, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0, 1, 0, -Infinity, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0, 1, 0, NaN, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0, 1, 0, 0, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0, 1, 0, 0, -Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0, 1, 0, 0, NaN); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, Infinity, 1, 0, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, Infinity, Infinity, 0, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, Infinity, Infinity, Infinity, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, Infinity, Infinity, Infinity, Infinity, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, Infinity, Infinity, Infinity, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, Infinity, Infinity, Infinity, 0, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, Infinity, Infinity, 0, Infinity, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, Infinity, Infinity, 0, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, Infinity, Infinity, 0, 0, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, Infinity, 1, Infinity, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, Infinity, 1, Infinity, Infinity, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, Infinity, 1, Infinity, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, Infinity, 1, Infinity, 0, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, Infinity, 1, 0, Infinity, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, Infinity, 1, 0, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, Infinity, 1, 0, 0, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, 0, Infinity, 0, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, 0, Infinity, Infinity, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, 0, Infinity, Infinity, Infinity, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, 0, Infinity, Infinity, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, 0, Infinity, Infinity, 0, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, 0, Infinity, 0, Infinity, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, 0, Infinity, 0, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, 0, Infinity, 0, 0, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, 0, 1, Infinity, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, 0, 1, Infinity, Infinity, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, 0, 1, Infinity, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, 0, 1, Infinity, 0, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, 0, 1, 0, Infinity, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, 0, 1, 0, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, 0, 1, 0, 0, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, Infinity, Infinity, 0, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, Infinity, Infinity, Infinity, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, Infinity, Infinity, Infinity, Infinity, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, Infinity, Infinity, Infinity, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, Infinity, Infinity, Infinity, 0, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, Infinity, Infinity, 0, Infinity, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, Infinity, Infinity, 0, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, Infinity, Infinity, 0, 0, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, Infinity, 1, Infinity, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, Infinity, 1, Infinity, Infinity, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, Infinity, 1, Infinity, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, Infinity, 1, Infinity, 0, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, Infinity, 1, 0, Infinity, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, Infinity, 1, 0, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, Infinity, 1, 0, 0, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0, Infinity, Infinity, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0, Infinity, Infinity, Infinity, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0, Infinity, Infinity, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0, Infinity, Infinity, 0, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0, Infinity, 0, Infinity, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0, Infinity, 0, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0, Infinity, 0, 0, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0, 1, Infinity, Infinity, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0, 1, Infinity, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0, 1, Infinity, 0, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0, 1, 0, Infinity, Infinity); });
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.nonfinite.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.nonfinite.worker.js
new file mode 100644
index 0000000000..f09946947c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.nonfinite.worker.js
@@ -0,0 +1,97 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.gradient.radial.nonfinite
+// Description:createRadialGradient() throws TypeError if arguments are not finite
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("createRadialGradient() throws TypeError if arguments are not finite");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, 0, 1, 0, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(-Infinity, 0, 1, 0, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(NaN, 0, 1, 0, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, Infinity, 1, 0, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, -Infinity, 1, 0, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, NaN, 1, 0, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0, Infinity, 0, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0, -Infinity, 0, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0, NaN, 0, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0, 1, Infinity, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0, 1, -Infinity, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0, 1, NaN, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0, 1, 0, Infinity, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0, 1, 0, -Infinity, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0, 1, 0, NaN, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0, 1, 0, 0, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0, 1, 0, 0, -Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0, 1, 0, 0, NaN); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, Infinity, 1, 0, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, Infinity, Infinity, 0, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, Infinity, Infinity, Infinity, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, Infinity, Infinity, Infinity, Infinity, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, Infinity, Infinity, Infinity, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, Infinity, Infinity, Infinity, 0, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, Infinity, Infinity, 0, Infinity, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, Infinity, Infinity, 0, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, Infinity, Infinity, 0, 0, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, Infinity, 1, Infinity, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, Infinity, 1, Infinity, Infinity, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, Infinity, 1, Infinity, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, Infinity, 1, Infinity, 0, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, Infinity, 1, 0, Infinity, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, Infinity, 1, 0, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, Infinity, 1, 0, 0, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, 0, Infinity, 0, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, 0, Infinity, Infinity, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, 0, Infinity, Infinity, Infinity, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, 0, Infinity, Infinity, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, 0, Infinity, Infinity, 0, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, 0, Infinity, 0, Infinity, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, 0, Infinity, 0, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, 0, Infinity, 0, 0, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, 0, 1, Infinity, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, 0, 1, Infinity, Infinity, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, 0, 1, Infinity, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, 0, 1, Infinity, 0, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, 0, 1, 0, Infinity, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, 0, 1, 0, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(Infinity, 0, 1, 0, 0, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, Infinity, Infinity, 0, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, Infinity, Infinity, Infinity, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, Infinity, Infinity, Infinity, Infinity, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, Infinity, Infinity, Infinity, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, Infinity, Infinity, Infinity, 0, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, Infinity, Infinity, 0, Infinity, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, Infinity, Infinity, 0, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, Infinity, Infinity, 0, 0, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, Infinity, 1, Infinity, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, Infinity, 1, Infinity, Infinity, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, Infinity, 1, Infinity, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, Infinity, 1, Infinity, 0, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, Infinity, 1, 0, Infinity, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, Infinity, 1, 0, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, Infinity, 1, 0, 0, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0, Infinity, Infinity, 0, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0, Infinity, Infinity, Infinity, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0, Infinity, Infinity, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0, Infinity, Infinity, 0, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0, Infinity, 0, Infinity, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0, Infinity, 0, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0, Infinity, 0, 0, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0, 1, Infinity, Infinity, 1); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0, 1, Infinity, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0, 1, Infinity, 0, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createRadialGradient(0, 0, 1, 0, Infinity, Infinity); });
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.outside1.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.outside1.html
new file mode 100644
index 0000000000..44b2aa49fc
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.outside1.html
@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.gradient.radial.outside1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.gradient.radial.outside1</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var g = ctx.createRadialGradient(200, 25, 10, 200, 25, 20);
+g.addColorStop(0, '#f00');
+g.addColorStop(1, '#0f0');
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 50,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 98,25, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 50,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.outside1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.outside1.worker.js
new file mode 100644
index 0000000000..e1d3cddb24
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.outside1.worker.js
@@ -0,0 +1,38 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.gradient.radial.outside1
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var g = ctx.createRadialGradient(200, 25, 10, 200, 25, 20);
+g.addColorStop(0, '#f00');
+g.addColorStop(1, '#0f0');
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 50,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 98,25, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 50,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.outside2.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.outside2.html
new file mode 100644
index 0000000000..e9e7ce497c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.outside2.html
@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.gradient.radial.outside2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.gradient.radial.outside2</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var g = ctx.createRadialGradient(200, 25, 20, 200, 25, 10);
+g.addColorStop(0, '#0f0');
+g.addColorStop(1, '#f00');
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 50,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 98,25, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 50,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.outside2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.outside2.worker.js
new file mode 100644
index 0000000000..a3f0235ed7
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.outside2.worker.js
@@ -0,0 +1,38 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.gradient.radial.outside2
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var g = ctx.createRadialGradient(200, 25, 20, 200, 25, 10);
+g.addColorStop(0, '#0f0');
+g.addColorStop(1, '#f00');
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 50,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 98,25, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 50,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.outside3.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.outside3.html
new file mode 100644
index 0000000000..b66480a52c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.outside3.html
@@ -0,0 +1,43 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.gradient.radial.outside3</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.gradient.radial.outside3</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var g = ctx.createRadialGradient(200, 25, 20, 200, 25, 10);
+g.addColorStop(0, '#0f0');
+g.addColorStop(0.001, '#f00');
+g.addColorStop(1, '#f00');
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 50,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 98,25, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 50,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.outside3.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.outside3.worker.js
new file mode 100644
index 0000000000..7b90c87d03
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.outside3.worker.js
@@ -0,0 +1,39 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.gradient.radial.outside3
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var g = ctx.createRadialGradient(200, 25, 20, 200, 25, 10);
+g.addColorStop(0, '#0f0');
+g.addColorStop(0.001, '#f00');
+g.addColorStop(1, '#f00');
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 50,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 98,25, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 50,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.touch1.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.touch1.html
new file mode 100644
index 0000000000..c042b03b33
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.touch1.html
@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.gradient.radial.touch1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.gradient.radial.touch1</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+var g = ctx.createRadialGradient(150, 25, 50, 200, 25, 100);
+g.addColorStop(0, '#f00');
+g.addColorStop(1, '#f00');
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 50,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 98,25, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 50,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.touch1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.touch1.worker.js
new file mode 100644
index 0000000000..7465345f6b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.touch1.worker.js
@@ -0,0 +1,38 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.gradient.radial.touch1
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+var g = ctx.createRadialGradient(150, 25, 50, 200, 25, 100);
+g.addColorStop(0, '#f00');
+g.addColorStop(1, '#f00');
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 50,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 98,25, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 50,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.touch2.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.touch2.html
new file mode 100644
index 0000000000..5da1d592f8
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.touch2.html
@@ -0,0 +1,44 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.gradient.radial.touch2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.gradient.radial.touch2</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var g = ctx.createRadialGradient(-80, 25, 70, 0, 25, 150);
+g.addColorStop(0, '#f00');
+g.addColorStop(0.01, '#0f0');
+g.addColorStop(0.99, '#0f0');
+g.addColorStop(1, '#f00');
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 50,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 98,25, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 50,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.touch2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.touch2.worker.js
new file mode 100644
index 0000000000..91dfcb31ac
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.touch2.worker.js
@@ -0,0 +1,40 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.gradient.radial.touch2
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var g = ctx.createRadialGradient(-80, 25, 70, 0, 25, 150);
+g.addColorStop(0, '#f00');
+g.addColorStop(0.01, '#0f0');
+g.addColorStop(0.99, '#0f0');
+g.addColorStop(1, '#f00');
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 50,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 98,25, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 50,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.touch3.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.touch3.html
new file mode 100644
index 0000000000..804589f074
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.touch3.html
@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.gradient.radial.touch3</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.gradient.radial.touch3</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+var g = ctx.createRadialGradient(120, -15, 25, 140, -30, 50);
+g.addColorStop(0, '#f00');
+g.addColorStop(1, '#f00');
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 50,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 98,25, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 50,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.touch3.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.touch3.worker.js
new file mode 100644
index 0000000000..11e17fbb80
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.touch3.worker.js
@@ -0,0 +1,38 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.gradient.radial.touch3
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+var g = ctx.createRadialGradient(120, -15, 25, 140, -30, 50);
+g.addColorStop(0, '#f00');
+g.addColorStop(1, '#f00');
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 50,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 98,25, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 50,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.transform.1.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.transform.1.html
new file mode 100644
index 0000000000..c54044c0ea
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.transform.1.html
@@ -0,0 +1,38 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.gradient.radial.transform.1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.gradient.radial.transform.1</h1>
+<p class="desc">Radial gradient coordinates are relative to the coordinate space at the time of filling</p>
+
+
+<script>
+var t = async_test("Radial gradient coordinates are relative to the coordinate space at the time of filling");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var g = ctx.createRadialGradient(0, 0, 0, 0, 0, 11.2);
+g.addColorStop(0, '#0f0');
+g.addColorStop(0.5, '#0f0');
+g.addColorStop(0.51, '#f00');
+g.addColorStop(1, '#f00');
+ctx.fillStyle = g;
+ctx.translate(50, 25);
+ctx.scale(10, 10);
+ctx.fillRect(-5, -2.5, 10, 5);
+_assertPixel(canvas, 25,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 75,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.transform.1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.transform.1.worker.js
new file mode 100644
index 0000000000..e2159d269f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.transform.1.worker.js
@@ -0,0 +1,34 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.gradient.radial.transform.1
+// Description:Radial gradient coordinates are relative to the coordinate space at the time of filling
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Radial gradient coordinates are relative to the coordinate space at the time of filling");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var g = ctx.createRadialGradient(0, 0, 0, 0, 0, 11.2);
+g.addColorStop(0, '#0f0');
+g.addColorStop(0.5, '#0f0');
+g.addColorStop(0.51, '#f00');
+g.addColorStop(1, '#f00');
+ctx.fillStyle = g;
+ctx.translate(50, 25);
+ctx.scale(10, 10);
+ctx.fillRect(-5, -2.5, 10, 5);
+_assertPixel(canvas, 25,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 75,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.transform.2.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.transform.2.html
new file mode 100644
index 0000000000..145c2923e9
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.transform.2.html
@@ -0,0 +1,39 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.gradient.radial.transform.2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.gradient.radial.transform.2</h1>
+<p class="desc">Radial gradient coordinates are relative to the coordinate space at the time of filling</p>
+
+
+<script>
+var t = async_test("Radial gradient coordinates are relative to the coordinate space at the time of filling");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.translate(100, 0);
+var g = ctx.createRadialGradient(0, 0, 0, 0, 0, 11.2);
+g.addColorStop(0, '#0f0');
+g.addColorStop(0.5, '#0f0');
+g.addColorStop(0.51, '#f00');
+g.addColorStop(1, '#f00');
+ctx.fillStyle = g;
+ctx.translate(-50, 25);
+ctx.scale(10, 10);
+ctx.fillRect(-5, -2.5, 10, 5);
+_assertPixel(canvas, 25,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 75,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.transform.2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.transform.2.worker.js
new file mode 100644
index 0000000000..511b7f362a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.transform.2.worker.js
@@ -0,0 +1,35 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.gradient.radial.transform.2
+// Description:Radial gradient coordinates are relative to the coordinate space at the time of filling
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Radial gradient coordinates are relative to the coordinate space at the time of filling");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.translate(100, 0);
+var g = ctx.createRadialGradient(0, 0, 0, 0, 0, 11.2);
+g.addColorStop(0, '#0f0');
+g.addColorStop(0.5, '#0f0');
+g.addColorStop(0.51, '#f00');
+g.addColorStop(1, '#f00');
+ctx.fillStyle = g;
+ctx.translate(-50, 25);
+ctx.scale(10, 10);
+ctx.fillRect(-5, -2.5, 10, 5);
+_assertPixel(canvas, 25,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 75,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.transform.3.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.transform.3.html
new file mode 100644
index 0000000000..01d14cfbfc
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.transform.3.html
@@ -0,0 +1,39 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.gradient.radial.transform.3</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.gradient.radial.transform.3</h1>
+<p class="desc">Radial gradient transforms do not experience broken caching effects</p>
+
+
+<script>
+var t = async_test("Radial gradient transforms do not experience broken caching effects");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var g = ctx.createRadialGradient(0, 0, 0, 0, 0, 11.2);
+g.addColorStop(0, '#0f0');
+g.addColorStop(0.5, '#0f0');
+g.addColorStop(0.51, '#f00');
+g.addColorStop(1, '#f00');
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+ctx.translate(50, 25);
+ctx.scale(10, 10);
+ctx.fillRect(-5, -2.5, 10, 5);
+_assertPixel(canvas, 25,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 75,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.transform.3.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.transform.3.worker.js
new file mode 100644
index 0000000000..b7bf68a979
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.transform.3.worker.js
@@ -0,0 +1,35 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.gradient.radial.transform.3
+// Description:Radial gradient transforms do not experience broken caching effects
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Radial gradient transforms do not experience broken caching effects");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var g = ctx.createRadialGradient(0, 0, 0, 0, 0, 11.2);
+g.addColorStop(0, '#0f0');
+g.addColorStop(0.5, '#0f0');
+g.addColorStop(0.51, '#f00');
+g.addColorStop(1, '#f00');
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+ctx.translate(50, 25);
+ctx.scale(10, 10);
+ctx.fillRect(-5, -2.5, 10, 5);
+_assertPixel(canvas, 25,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 75,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.basic.canvas.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.basic.canvas.html
new file mode 100644
index 0000000000..80bb946660
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.basic.canvas.html
@@ -0,0 +1,44 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.pattern.basic.canvas</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.pattern.basic.canvas</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+var ctx2 = offscreenCanvas2.getContext('2d');
+ctx2.fillStyle = '#0f0';
+ctx2.fillRect(0, 0, 100, 50);
+var pattern = ctx.createPattern(offscreenCanvas2, 'no-repeat');
+ctx.fillStyle = pattern;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 50,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 98,25, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 50,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.basic.canvas.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.basic.canvas.worker.js
new file mode 100644
index 0000000000..a2608066ea
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.basic.canvas.worker.js
@@ -0,0 +1,40 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.pattern.basic.canvas
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+var ctx2 = offscreenCanvas2.getContext('2d');
+ctx2.fillStyle = '#0f0';
+ctx2.fillRect(0, 0, 100, 50);
+var pattern = ctx.createPattern(offscreenCanvas2, 'no-repeat');
+ctx.fillStyle = pattern;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 50,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 98,25, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 50,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.basic.image.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.basic.image.html
new file mode 100644
index 0000000000..965daccd3a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.basic.image.html
@@ -0,0 +1,47 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.pattern.basic.image</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.pattern.basic.image</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/green.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ var pattern = ctx.createPattern(bitmap, 'no-repeat');
+ ctx.fillStyle = pattern;
+ ctx.fillRect(0, 0, 100, 50);
+ _assertPixel(canvas, 1,1, 0,255,0,255);
+ _assertPixel(canvas, 98,1, 0,255,0,255);
+ _assertPixel(canvas, 1,48, 0,255,0,255);
+ _assertPixel(canvas, 98,48, 0,255,0,255);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.basic.image.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.basic.image.worker.js
new file mode 100644
index 0000000000..725df51307
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.basic.image.worker.js
@@ -0,0 +1,43 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.pattern.basic.image
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/green.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ var pattern = ctx.createPattern(bitmap, 'no-repeat');
+ ctx.fillStyle = pattern;
+ ctx.fillRect(0, 0, 100, 50);
+ _assertPixel(canvas, 1,1, 0,255,0,255);
+ _assertPixel(canvas, 98,1, 0,255,0,255);
+ _assertPixel(canvas, 1,48, 0,255,0,255);
+ _assertPixel(canvas, 98,48, 0,255,0,255);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.basic.nocontext.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.basic.nocontext.html
new file mode 100644
index 0000000000..50cd38ed0f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.basic.nocontext.html
@@ -0,0 +1,37 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.pattern.basic.nocontext</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.pattern.basic.nocontext</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+var pattern = ctx.createPattern(offscreenCanvas2, 'no-repeat');
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.fillStyle = pattern;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.basic.nocontext.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.basic.nocontext.worker.js
new file mode 100644
index 0000000000..8f33ec9d8d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.basic.nocontext.worker.js
@@ -0,0 +1,33 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.pattern.basic.nocontext
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+var pattern = ctx.createPattern(offscreenCanvas2, 'no-repeat');
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.fillStyle = pattern;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.basic.zerocanvas.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.basic.zerocanvas.html
new file mode 100644
index 0000000000..5c395ab94e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.basic.zerocanvas.html
@@ -0,0 +1,41 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.pattern.basic.zerocanvas</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.pattern.basic.zerocanvas</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+canvas.width = 0;
+canvas.height = 10;
+_assertSame(canvas.width, 0, "canvas.width", "0");
+_assertSame(canvas.height, 10, "canvas.height", "10");
+assert_throws_dom("INVALID_STATE_ERR", function() { ctx.createPattern(canvas, 'repeat'); });
+canvas.width = 10;
+canvas.height = 0;
+_assertSame(canvas.width, 10, "canvas.width", "10");
+_assertSame(canvas.height, 0, "canvas.height", "0");
+assert_throws_dom("INVALID_STATE_ERR", function() { ctx.createPattern(canvas, 'repeat'); });
+canvas.width = 0;
+canvas.height = 0;
+_assertSame(canvas.width, 0, "canvas.width", "0");
+_assertSame(canvas.height, 0, "canvas.height", "0");
+assert_throws_dom("INVALID_STATE_ERR", function() { ctx.createPattern(canvas, 'repeat'); });
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.basic.zerocanvas.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.basic.zerocanvas.worker.js
new file mode 100644
index 0000000000..b02e3cc232
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.basic.zerocanvas.worker.js
@@ -0,0 +1,37 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.pattern.basic.zerocanvas
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+canvas.width = 0;
+canvas.height = 10;
+_assertSame(canvas.width, 0, "canvas.width", "0");
+_assertSame(canvas.height, 10, "canvas.height", "10");
+assert_throws_dom("INVALID_STATE_ERR", function() { ctx.createPattern(canvas, 'repeat'); });
+canvas.width = 10;
+canvas.height = 0;
+_assertSame(canvas.width, 10, "canvas.width", "10");
+_assertSame(canvas.height, 0, "canvas.height", "0");
+assert_throws_dom("INVALID_STATE_ERR", function() { ctx.createPattern(canvas, 'repeat'); });
+canvas.width = 0;
+canvas.height = 0;
+_assertSame(canvas.width, 0, "canvas.width", "0");
+_assertSame(canvas.height, 0, "canvas.height", "0");
+assert_throws_dom("INVALID_STATE_ERR", function() { ctx.createPattern(canvas, 'repeat'); });
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.crosscanvas.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.crosscanvas.html
new file mode 100644
index 0000000000..c6e0b36092
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.crosscanvas.html
@@ -0,0 +1,45 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.pattern.crosscanvas</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.pattern.crosscanvas</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/green.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+ var pattern = offscreenCanvas2.getContext('2d').createPattern(bitmap, 'no-repeat');
+ ctx.fillStyle = '#f00';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.fillStyle = pattern;
+ ctx.fillRect(0, 0, 100, 50);
+ _assertPixel(canvas, 50,25, 0,255,0,255);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.crosscanvas.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.crosscanvas.worker.js
new file mode 100644
index 0000000000..1a1d045ba6
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.crosscanvas.worker.js
@@ -0,0 +1,41 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.pattern.crosscanvas
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/green.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+ var pattern = offscreenCanvas2.getContext('2d').createPattern(bitmap, 'no-repeat');
+ ctx.fillStyle = '#f00';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.fillStyle = pattern;
+ ctx.fillRect(0, 0, 100, 50);
+ _assertPixel(canvas, 50,25, 0,255,0,255);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.image.null.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.image.null.html
new file mode 100644
index 0000000000..e3ad03190d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.image.null.html
@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.pattern.image.null</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.pattern.image.null</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_js(TypeError, function() { ctx.createPattern(null, 'repeat'); });
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.image.null.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.image.null.worker.js
new file mode 100644
index 0000000000..63dcb8f942
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.image.null.worker.js
@@ -0,0 +1,23 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.pattern.image.null
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_js(TypeError, function() { ctx.createPattern(null, 'repeat'); });
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.image.string.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.image.string.html
new file mode 100644
index 0000000000..ac202ee2a4
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.image.string.html
@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.pattern.image.string</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.pattern.image.string</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_js(TypeError, function() { ctx.createPattern('../images/red.png', 'repeat'); });
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.image.string.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.image.string.worker.js
new file mode 100644
index 0000000000..c07e7d51ef
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.image.string.worker.js
@@ -0,0 +1,23 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.pattern.image.string
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_js(TypeError, function() { ctx.createPattern('../images/red.png', 'repeat'); });
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.image.undefined.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.image.undefined.html
new file mode 100644
index 0000000000..0593d41529
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.image.undefined.html
@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.pattern.image.undefined</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.pattern.image.undefined</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_js(TypeError, function() { ctx.createPattern(undefined, 'repeat'); });
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.image.undefined.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.image.undefined.worker.js
new file mode 100644
index 0000000000..1e94f39ea9
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.image.undefined.worker.js
@@ -0,0 +1,23 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.pattern.image.undefined
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_js(TypeError, function() { ctx.createPattern(undefined, 'repeat'); });
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.modify.canvas1.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.modify.canvas1.html
new file mode 100644
index 0000000000..4c27f26347
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.modify.canvas1.html
@@ -0,0 +1,39 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.pattern.modify.canvas1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.pattern.modify.canvas1</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+var ctx2 = offscreenCanvas2.getContext('2d');
+ctx2.fillStyle = '#0f0';
+ctx2.fillRect(0, 0, 100, 50);
+var pattern = ctx.createPattern(offscreenCanvas2, 'no-repeat');
+ctx2.fillStyle = '#f00';
+ctx2.fillRect(0, 0, 100, 50);
+ctx.fillStyle = pattern;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.modify.canvas1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.modify.canvas1.worker.js
new file mode 100644
index 0000000000..c83755c984
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.modify.canvas1.worker.js
@@ -0,0 +1,35 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.pattern.modify.canvas1
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+var ctx2 = offscreenCanvas2.getContext('2d');
+ctx2.fillStyle = '#0f0';
+ctx2.fillRect(0, 0, 100, 50);
+var pattern = ctx.createPattern(offscreenCanvas2, 'no-repeat');
+ctx2.fillStyle = '#f00';
+ctx2.fillRect(0, 0, 100, 50);
+ctx.fillStyle = pattern;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.modify.canvas2.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.modify.canvas2.html
new file mode 100644
index 0000000000..08a6cd896e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.modify.canvas2.html
@@ -0,0 +1,43 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.pattern.modify.canvas2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.pattern.modify.canvas2</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+var ctx2 = offscreenCanvas2.getContext('2d');
+ctx2.fillStyle = '#0f0';
+ctx2.fillRect(0, 0, 100, 50);
+var pattern = ctx.createPattern(offscreenCanvas2, 'no-repeat');
+ctx.fillStyle = pattern;
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx2.fillStyle = '#f00';
+ctx2.fillRect(0, 0, 100, 50);
+ctx.fillStyle = pattern;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.modify.canvas2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.modify.canvas2.worker.js
new file mode 100644
index 0000000000..a49dd10213
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.modify.canvas2.worker.js
@@ -0,0 +1,39 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.pattern.modify.canvas2
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+var ctx2 = offscreenCanvas2.getContext('2d');
+ctx2.fillStyle = '#0f0';
+ctx2.fillRect(0, 0, 100, 50);
+var pattern = ctx.createPattern(offscreenCanvas2, 'no-repeat');
+ctx.fillStyle = pattern;
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx2.fillStyle = '#f00';
+ctx2.fillRect(0, 0, 100, 50);
+ctx.fillStyle = pattern;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.norepeat.basic.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.norepeat.basic.html
new file mode 100644
index 0000000000..f5d9f5a558
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.norepeat.basic.html
@@ -0,0 +1,47 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.pattern.paint.norepeat.basic</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.pattern.paint.norepeat.basic</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/green.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ var pattern = ctx.createPattern(bitmap, 'no-repeat');
+ ctx.fillStyle = pattern;
+ ctx.fillRect(0, 0, 100, 50);
+ _assertPixel(canvas, 1,1, 0,255,0,255);
+ _assertPixel(canvas, 98,1, 0,255,0,255);
+ _assertPixel(canvas, 1,48, 0,255,0,255);
+ _assertPixel(canvas, 98,48, 0,255,0,255);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.norepeat.basic.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.norepeat.basic.worker.js
new file mode 100644
index 0000000000..82a49c331b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.norepeat.basic.worker.js
@@ -0,0 +1,43 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.pattern.paint.norepeat.basic
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/green.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ var pattern = ctx.createPattern(bitmap, 'no-repeat');
+ ctx.fillStyle = pattern;
+ ctx.fillRect(0, 0, 100, 50);
+ _assertPixel(canvas, 1,1, 0,255,0,255);
+ _assertPixel(canvas, 98,1, 0,255,0,255);
+ _assertPixel(canvas, 1,48, 0,255,0,255);
+ _assertPixel(canvas, 98,48, 0,255,0,255);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.norepeat.coord1.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.norepeat.coord1.html
new file mode 100644
index 0000000000..87158be57c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.norepeat.coord1.html
@@ -0,0 +1,50 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.pattern.paint.norepeat.coord1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.pattern.paint.norepeat.coord1</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 50, 50);
+ctx.fillStyle = '#f00';
+ctx.fillRect(50, 0, 50, 50);
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/green.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ var pattern = ctx.createPattern(bitmap, 'no-repeat');
+ ctx.fillStyle = pattern;
+ ctx.translate(50, 0);
+ ctx.fillRect(-50, 0, 100, 50);
+ _assertPixel(canvas, 1,1, 0,255,0,255);
+ _assertPixel(canvas, 98,1, 0,255,0,255);
+ _assertPixel(canvas, 1,48, 0,255,0,255);
+ _assertPixel(canvas, 98,48, 0,255,0,255);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.norepeat.coord1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.norepeat.coord1.worker.js
new file mode 100644
index 0000000000..731df50c00
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.norepeat.coord1.worker.js
@@ -0,0 +1,46 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.pattern.paint.norepeat.coord1
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 50, 50);
+ctx.fillStyle = '#f00';
+ctx.fillRect(50, 0, 50, 50);
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/green.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ var pattern = ctx.createPattern(bitmap, 'no-repeat');
+ ctx.fillStyle = pattern;
+ ctx.translate(50, 0);
+ ctx.fillRect(-50, 0, 100, 50);
+ _assertPixel(canvas, 1,1, 0,255,0,255);
+ _assertPixel(canvas, 98,1, 0,255,0,255);
+ _assertPixel(canvas, 1,48, 0,255,0,255);
+ _assertPixel(canvas, 98,48, 0,255,0,255);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.norepeat.coord2.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.norepeat.coord2.html
new file mode 100644
index 0000000000..a600e6ef57
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.norepeat.coord2.html
@@ -0,0 +1,50 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.pattern.paint.norepeat.coord2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.pattern.paint.norepeat.coord2</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/green.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ var pattern = ctx.createPattern(bitmap, 'no-repeat');
+ ctx.fillStyle = pattern;
+ ctx.fillRect(0, 0, 50, 50);
+ ctx.fillStyle = '#f00';
+ ctx.fillRect(50, 0, 50, 50);
+ ctx.fillStyle = pattern;
+ ctx.translate(50, 0);
+ ctx.fillRect(-50, 0, 100, 50);
+ _assertPixel(canvas, 1,1, 0,255,0,255);
+ _assertPixel(canvas, 98,1, 0,255,0,255);
+ _assertPixel(canvas, 1,48, 0,255,0,255);
+ _assertPixel(canvas, 98,48, 0,255,0,255);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.norepeat.coord2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.norepeat.coord2.worker.js
new file mode 100644
index 0000000000..bd9c115f0d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.norepeat.coord2.worker.js
@@ -0,0 +1,46 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.pattern.paint.norepeat.coord2
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/green.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ var pattern = ctx.createPattern(bitmap, 'no-repeat');
+ ctx.fillStyle = pattern;
+ ctx.fillRect(0, 0, 50, 50);
+ ctx.fillStyle = '#f00';
+ ctx.fillRect(50, 0, 50, 50);
+ ctx.fillStyle = pattern;
+ ctx.translate(50, 0);
+ ctx.fillRect(-50, 0, 100, 50);
+ _assertPixel(canvas, 1,1, 0,255,0,255);
+ _assertPixel(canvas, 98,1, 0,255,0,255);
+ _assertPixel(canvas, 1,48, 0,255,0,255);
+ _assertPixel(canvas, 98,48, 0,255,0,255);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.norepeat.coord3.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.norepeat.coord3.html
new file mode 100644
index 0000000000..c569d87705
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.norepeat.coord3.html
@@ -0,0 +1,50 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.pattern.paint.norepeat.coord3</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.pattern.paint.norepeat.coord3</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/red.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ var pattern = ctx.createPattern(bitmap, 'no-repeat');
+ ctx.fillStyle = pattern;
+ ctx.translate(50, 25);
+ ctx.fillRect(-50, -25, 100, 50);
+ ctx.fillStyle = '#0f0';
+ ctx.fillRect(0, 0, 50, 25);
+ _assertPixel(canvas, 1,1, 0,255,0,255);
+ _assertPixel(canvas, 98,1, 0,255,0,255);
+ _assertPixel(canvas, 1,48, 0,255,0,255);
+ _assertPixel(canvas, 98,48, 0,255,0,255);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.norepeat.coord3.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.norepeat.coord3.worker.js
new file mode 100644
index 0000000000..cf88ebab73
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.norepeat.coord3.worker.js
@@ -0,0 +1,46 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.pattern.paint.norepeat.coord3
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/red.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ var pattern = ctx.createPattern(bitmap, 'no-repeat');
+ ctx.fillStyle = pattern;
+ ctx.translate(50, 25);
+ ctx.fillRect(-50, -25, 100, 50);
+ ctx.fillStyle = '#0f0';
+ ctx.fillRect(0, 0, 50, 25);
+ _assertPixel(canvas, 1,1, 0,255,0,255);
+ _assertPixel(canvas, 98,1, 0,255,0,255);
+ _assertPixel(canvas, 1,48, 0,255,0,255);
+ _assertPixel(canvas, 98,48, 0,255,0,255);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.norepeat.outside.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.norepeat.outside.html
new file mode 100644
index 0000000000..4242375b03
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.norepeat.outside.html
@@ -0,0 +1,52 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.pattern.paint.norepeat.outside</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.pattern.paint.norepeat.outside</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/red.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ var pattern = ctx.createPattern(bitmap, 'no-repeat');
+ ctx.fillStyle = '#0f0';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.fillStyle = pattern;
+ ctx.fillRect(0, -50, 100, 50);
+ ctx.fillRect(-100, 0, 100, 50);
+ ctx.fillRect(0, 50, 100, 50);
+ ctx.fillRect(100, 0, 100, 50);
+ _assertPixel(canvas, 1,1, 0,255,0,255);
+ _assertPixel(canvas, 98,1, 0,255,0,255);
+ _assertPixel(canvas, 1,48, 0,255,0,255);
+ _assertPixel(canvas, 98,48, 0,255,0,255);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.norepeat.outside.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.norepeat.outside.worker.js
new file mode 100644
index 0000000000..85a6e43bd1
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.norepeat.outside.worker.js
@@ -0,0 +1,48 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.pattern.paint.norepeat.outside
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/red.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ var pattern = ctx.createPattern(bitmap, 'no-repeat');
+ ctx.fillStyle = '#0f0';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.fillStyle = pattern;
+ ctx.fillRect(0, -50, 100, 50);
+ ctx.fillRect(-100, 0, 100, 50);
+ ctx.fillRect(0, 50, 100, 50);
+ ctx.fillRect(100, 0, 100, 50);
+ _assertPixel(canvas, 1,1, 0,255,0,255);
+ _assertPixel(canvas, 98,1, 0,255,0,255);
+ _assertPixel(canvas, 1,48, 0,255,0,255);
+ _assertPixel(canvas, 98,48, 0,255,0,255);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.orientation.canvas.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.orientation.canvas.html
new file mode 100644
index 0000000000..ccad92e529
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.orientation.canvas.html
@@ -0,0 +1,43 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.pattern.paint.orientation.canvas</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.pattern.paint.orientation.canvas</h1>
+<p class="desc">Canvas patterns do not get flipped when painted</p>
+
+
+<script>
+var t = async_test("Canvas patterns do not get flipped when painted");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+var ctx2 = offscreenCanvas2.getContext('2d');
+ctx2.fillStyle = '#f00';
+ctx2.fillRect(0, 0, 100, 25);
+ctx2.fillStyle = '#0f0';
+ctx2.fillRect(0, 25, 100, 25);
+var pattern = ctx.createPattern(offscreenCanvas2, 'no-repeat');
+ctx.fillStyle = pattern;
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 25);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.orientation.canvas.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.orientation.canvas.worker.js
new file mode 100644
index 0000000000..38fa35f138
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.orientation.canvas.worker.js
@@ -0,0 +1,39 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.pattern.paint.orientation.canvas
+// Description:Canvas patterns do not get flipped when painted
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Canvas patterns do not get flipped when painted");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+var ctx2 = offscreenCanvas2.getContext('2d');
+ctx2.fillStyle = '#f00';
+ctx2.fillRect(0, 0, 100, 25);
+ctx2.fillStyle = '#0f0';
+ctx2.fillRect(0, 25, 100, 25);
+var pattern = ctx.createPattern(offscreenCanvas2, 'no-repeat');
+ctx.fillStyle = pattern;
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 25);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.orientation.image.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.orientation.image.html
new file mode 100644
index 0000000000..377cc58685
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.orientation.image.html
@@ -0,0 +1,52 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.pattern.paint.orientation.image</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.pattern.paint.orientation.image</h1>
+<p class="desc">Image patterns do not get flipped when painted</p>
+
+
+<script>
+var t = async_test("Image patterns do not get flipped when painted");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/rrgg-256x256.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ var pattern = ctx.createPattern(bitmap, 'no-repeat');
+ ctx.fillStyle = pattern;
+ ctx.save();
+ ctx.translate(0, -103);
+ ctx.fillRect(0, 103, 100, 50);
+ ctx.restore();
+ ctx.fillStyle = '#0f0';
+ ctx.fillRect(0, 0, 100, 25);
+ _assertPixel(canvas, 1,1, 0,255,0,255);
+ _assertPixel(canvas, 98,1, 0,255,0,255);
+ _assertPixel(canvas, 1,48, 0,255,0,255);
+ _assertPixel(canvas, 98,48, 0,255,0,255);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.orientation.image.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.orientation.image.worker.js
new file mode 100644
index 0000000000..fccfe70426
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.orientation.image.worker.js
@@ -0,0 +1,48 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.pattern.paint.orientation.image
+// Description:Image patterns do not get flipped when painted
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Image patterns do not get flipped when painted");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/rrgg-256x256.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ var pattern = ctx.createPattern(bitmap, 'no-repeat');
+ ctx.fillStyle = pattern;
+ ctx.save();
+ ctx.translate(0, -103);
+ ctx.fillRect(0, 103, 100, 50);
+ ctx.restore();
+ ctx.fillStyle = '#0f0';
+ ctx.fillRect(0, 0, 100, 25);
+ _assertPixel(canvas, 1,1, 0,255,0,255);
+ _assertPixel(canvas, 98,1, 0,255,0,255);
+ _assertPixel(canvas, 1,48, 0,255,0,255);
+ _assertPixel(canvas, 98,48, 0,255,0,255);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeat.basic.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeat.basic.html
new file mode 100644
index 0000000000..b5613c3798
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeat.basic.html
@@ -0,0 +1,47 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.pattern.paint.repeat.basic</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.pattern.paint.repeat.basic</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/green-16x16.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ var pattern = ctx.createPattern(bitmap, 'no-repeat');
+ ctx.fillStyle = pattern;
+ ctx.fillRect(0, 0, 100, 50);
+ _assertPixel(canvas, 1,1, 0,255,0,255);
+ _assertPixel(canvas, 98,1, 0,255,0,255);
+ _assertPixel(canvas, 1,48, 0,255,0,255);
+ _assertPixel(canvas, 98,48, 0,255,0,255);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeat.basic.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeat.basic.worker.js
new file mode 100644
index 0000000000..1f09d297f9
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeat.basic.worker.js
@@ -0,0 +1,43 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.pattern.paint.repeat.basic
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/green-16x16.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ var pattern = ctx.createPattern(bitmap, 'no-repeat');
+ ctx.fillStyle = pattern;
+ ctx.fillRect(0, 0, 100, 50);
+ _assertPixel(canvas, 1,1, 0,255,0,255);
+ _assertPixel(canvas, 98,1, 0,255,0,255);
+ _assertPixel(canvas, 1,48, 0,255,0,255);
+ _assertPixel(canvas, 98,48, 0,255,0,255);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeat.coord1.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeat.coord1.html
new file mode 100644
index 0000000000..a4b2bbdd7d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeat.coord1.html
@@ -0,0 +1,48 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.pattern.paint.repeat.coord1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.pattern.paint.repeat.coord1</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/rgrg-256x256.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ var pattern = ctx.createPattern(bitmap, 'no-repeat');
+ ctx.fillStyle = pattern;
+ ctx.translate(-128, -78);
+ ctx.fillRect(128, 78, 100, 50);
+ _assertPixel(canvas, 1,1, 0,255,0,255);
+ _assertPixel(canvas, 98,1, 0,255,0,255);
+ _assertPixel(canvas, 1,48, 0,255,0,255);
+ _assertPixel(canvas, 98,48, 0,255,0,255);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeat.coord1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeat.coord1.worker.js
new file mode 100644
index 0000000000..ea064ea327
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeat.coord1.worker.js
@@ -0,0 +1,44 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.pattern.paint.repeat.coord1
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/rgrg-256x256.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ var pattern = ctx.createPattern(bitmap, 'no-repeat');
+ ctx.fillStyle = pattern;
+ ctx.translate(-128, -78);
+ ctx.fillRect(128, 78, 100, 50);
+ _assertPixel(canvas, 1,1, 0,255,0,255);
+ _assertPixel(canvas, 98,1, 0,255,0,255);
+ _assertPixel(canvas, 1,48, 0,255,0,255);
+ _assertPixel(canvas, 98,48, 0,255,0,255);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeat.coord2.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeat.coord2.html
new file mode 100644
index 0000000000..52449506a7
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeat.coord2.html
@@ -0,0 +1,45 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.pattern.paint.repeat.coord2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.pattern.paint.repeat.coord2</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/grgr-256x256.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ var pattern = ctx.createPattern(bitmap, 'no-repeat');
+ ctx.fillStyle = pattern;
+ ctx.fillRect(0, 0, 100, 50);
+ _assertPixel(canvas, 1,1, 0,255,0,255);
+ _assertPixel(canvas, 98,1, 0,255,0,255);
+ _assertPixel(canvas, 1,48, 0,255,0,255);
+ _assertPixel(canvas, 98,48, 0,255,0,255);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeat.coord2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeat.coord2.worker.js
new file mode 100644
index 0000000000..29c6f8f006
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeat.coord2.worker.js
@@ -0,0 +1,41 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.pattern.paint.repeat.coord2
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/grgr-256x256.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ var pattern = ctx.createPattern(bitmap, 'no-repeat');
+ ctx.fillStyle = pattern;
+ ctx.fillRect(0, 0, 100, 50);
+ _assertPixel(canvas, 1,1, 0,255,0,255);
+ _assertPixel(canvas, 98,1, 0,255,0,255);
+ _assertPixel(canvas, 1,48, 0,255,0,255);
+ _assertPixel(canvas, 98,48, 0,255,0,255);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeat.coord3.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeat.coord3.html
new file mode 100644
index 0000000000..d01acb8a6d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeat.coord3.html
@@ -0,0 +1,47 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.pattern.paint.repeat.coord3</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.pattern.paint.repeat.coord3</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/rgrg-256x256.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ var pattern = ctx.createPattern(bitmap, 'no-repeat');
+ ctx.fillStyle = pattern;
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.translate(-128, -78);
+ ctx.fillRect(128, 78, 100, 50);
+ _assertPixel(canvas, 1,1, 0,255,0,255);
+ _assertPixel(canvas, 98,1, 0,255,0,255);
+ _assertPixel(canvas, 1,48, 0,255,0,255);
+ _assertPixel(canvas, 98,48, 0,255,0,255);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeat.coord3.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeat.coord3.worker.js
new file mode 100644
index 0000000000..91c14f98dc
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeat.coord3.worker.js
@@ -0,0 +1,43 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.pattern.paint.repeat.coord3
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/rgrg-256x256.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ var pattern = ctx.createPattern(bitmap, 'no-repeat');
+ ctx.fillStyle = pattern;
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.translate(-128, -78);
+ ctx.fillRect(128, 78, 100, 50);
+ _assertPixel(canvas, 1,1, 0,255,0,255);
+ _assertPixel(canvas, 98,1, 0,255,0,255);
+ _assertPixel(canvas, 1,48, 0,255,0,255);
+ _assertPixel(canvas, 98,48, 0,255,0,255);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeat.outside.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeat.outside.html
new file mode 100644
index 0000000000..2c91f1d736
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeat.outside.html
@@ -0,0 +1,48 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.pattern.paint.repeat.outside</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.pattern.paint.repeat.outside</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/green-16x16.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ var pattern = ctx.createPattern(bitmap, 'no-repeat');
+ ctx.fillStyle = pattern;
+ ctx.translate(50, 25);
+ ctx.fillRect(-50, -25, 100, 50);
+ _assertPixel(canvas, 1,1, 0,255,0,255);
+ _assertPixel(canvas, 98,1, 0,255,0,255);
+ _assertPixel(canvas, 1,48, 0,255,0,255);
+ _assertPixel(canvas, 98,48, 0,255,0,255);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeat.outside.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeat.outside.worker.js
new file mode 100644
index 0000000000..147eadf8e7
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeat.outside.worker.js
@@ -0,0 +1,44 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.pattern.paint.repeat.outside
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/green-16x16.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ var pattern = ctx.createPattern(bitmap, 'no-repeat');
+ ctx.fillStyle = pattern;
+ ctx.translate(50, 25);
+ ctx.fillRect(-50, -25, 100, 50);
+ _assertPixel(canvas, 1,1, 0,255,0,255);
+ _assertPixel(canvas, 98,1, 0,255,0,255);
+ _assertPixel(canvas, 1,48, 0,255,0,255);
+ _assertPixel(canvas, 98,48, 0,255,0,255);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeatx.basic.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeatx.basic.html
new file mode 100644
index 0000000000..ed7cee297d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeatx.basic.html
@@ -0,0 +1,49 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.pattern.paint.repeatx.basic</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.pattern.paint.repeatx.basic</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 16);
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/green-16x16.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ var pattern = ctx.createPattern(bitmap, 'repeat-x');
+ ctx.fillStyle = pattern;
+ ctx.fillRect(0, 0, 100, 50);
+ _assertPixel(canvas, 1,1, 0,255,0,255);
+ _assertPixel(canvas, 98,1, 0,255,0,255);
+ _assertPixel(canvas, 1,48, 0,255,0,255);
+ _assertPixel(canvas, 98,48, 0,255,0,255);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeatx.basic.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeatx.basic.worker.js
new file mode 100644
index 0000000000..d7efcfa1e1
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeatx.basic.worker.js
@@ -0,0 +1,45 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.pattern.paint.repeatx.basic
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 16);
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/green-16x16.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ var pattern = ctx.createPattern(bitmap, 'repeat-x');
+ ctx.fillStyle = pattern;
+ ctx.fillRect(0, 0, 100, 50);
+ _assertPixel(canvas, 1,1, 0,255,0,255);
+ _assertPixel(canvas, 98,1, 0,255,0,255);
+ _assertPixel(canvas, 1,48, 0,255,0,255);
+ _assertPixel(canvas, 98,48, 0,255,0,255);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeatx.coord1.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeatx.coord1.html
new file mode 100644
index 0000000000..342ce06aad
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeatx.coord1.html
@@ -0,0 +1,52 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.pattern.paint.repeatx.coord1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.pattern.paint.repeatx.coord1</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/red-16x16.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ var pattern = ctx.createPattern(bitmap, 'repeat-x');
+ ctx.fillStyle = pattern;
+ ctx.translate(0, 16);
+ ctx.fillRect(0, -16, 100, 50);
+ ctx.fillStyle = '#0f0';
+ ctx.fillRect(0, 0, 100, 16);
+ _assertPixel(canvas, 1,1, 0,255,0,255);
+ _assertPixel(canvas, 98,1, 0,255,0,255);
+ _assertPixel(canvas, 1,25, 0,255,0,255);
+ _assertPixel(canvas, 98,25, 0,255,0,255);
+ _assertPixel(canvas, 1,48, 0,255,0,255);
+ _assertPixel(canvas, 98,48, 0,255,0,255);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeatx.coord1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeatx.coord1.worker.js
new file mode 100644
index 0000000000..351092befd
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeatx.coord1.worker.js
@@ -0,0 +1,48 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.pattern.paint.repeatx.coord1
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/red-16x16.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ var pattern = ctx.createPattern(bitmap, 'repeat-x');
+ ctx.fillStyle = pattern;
+ ctx.translate(0, 16);
+ ctx.fillRect(0, -16, 100, 50);
+ ctx.fillStyle = '#0f0';
+ ctx.fillRect(0, 0, 100, 16);
+ _assertPixel(canvas, 1,1, 0,255,0,255);
+ _assertPixel(canvas, 98,1, 0,255,0,255);
+ _assertPixel(canvas, 1,25, 0,255,0,255);
+ _assertPixel(canvas, 98,25, 0,255,0,255);
+ _assertPixel(canvas, 1,48, 0,255,0,255);
+ _assertPixel(canvas, 98,48, 0,255,0,255);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeatx.outside.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeatx.outside.html
new file mode 100644
index 0000000000..ad4a4a2461
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeatx.outside.html
@@ -0,0 +1,49 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.pattern.paint.repeatx.outside</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.pattern.paint.repeatx.outside</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/red-16x16.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ var pattern = ctx.createPattern(bitmap, 'repeat-x');
+ ctx.fillStyle = pattern;
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.fillStyle = '#0f0';
+ ctx.fillRect(0, 0, 100, 16);
+ _assertPixel(canvas, 1,1, 0,255,0,255);
+ _assertPixel(canvas, 98,1, 0,255,0,255);
+ _assertPixel(canvas, 1,48, 0,255,0,255);
+ _assertPixel(canvas, 98,48, 0,255,0,255);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeatx.outside.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeatx.outside.worker.js
new file mode 100644
index 0000000000..0e031109f2
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeatx.outside.worker.js
@@ -0,0 +1,45 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.pattern.paint.repeatx.outside
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/red-16x16.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ var pattern = ctx.createPattern(bitmap, 'repeat-x');
+ ctx.fillStyle = pattern;
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.fillStyle = '#0f0';
+ ctx.fillRect(0, 0, 100, 16);
+ _assertPixel(canvas, 1,1, 0,255,0,255);
+ _assertPixel(canvas, 98,1, 0,255,0,255);
+ _assertPixel(canvas, 1,48, 0,255,0,255);
+ _assertPixel(canvas, 98,48, 0,255,0,255);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeaty.basic.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeaty.basic.html
new file mode 100644
index 0000000000..6069902498
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeaty.basic.html
@@ -0,0 +1,49 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.pattern.paint.repeaty.basic</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.pattern.paint.repeaty.basic</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 16, 50);
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/green-16x16.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ var pattern = ctx.createPattern(bitmap, 'repeat-y');
+ ctx.fillStyle = pattern;
+ ctx.fillRect(0, 0, 100, 50);
+ _assertPixel(canvas, 1,1, 0,255,0,255);
+ _assertPixel(canvas, 98,1, 0,255,0,255);
+ _assertPixel(canvas, 1,48, 0,255,0,255);
+ _assertPixel(canvas, 98,48, 0,255,0,255);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeaty.basic.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeaty.basic.worker.js
new file mode 100644
index 0000000000..09e9b02394
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeaty.basic.worker.js
@@ -0,0 +1,45 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.pattern.paint.repeaty.basic
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 16, 50);
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/green-16x16.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ var pattern = ctx.createPattern(bitmap, 'repeat-y');
+ ctx.fillStyle = pattern;
+ ctx.fillRect(0, 0, 100, 50);
+ _assertPixel(canvas, 1,1, 0,255,0,255);
+ _assertPixel(canvas, 98,1, 0,255,0,255);
+ _assertPixel(canvas, 1,48, 0,255,0,255);
+ _assertPixel(canvas, 98,48, 0,255,0,255);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeaty.coord1.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeaty.coord1.html
new file mode 100644
index 0000000000..fd1cca2e95
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeaty.coord1.html
@@ -0,0 +1,52 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.pattern.paint.repeaty.coord1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.pattern.paint.repeaty.coord1</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/red-16x16.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ var pattern = ctx.createPattern(bitmap, 'repeat-y');
+ ctx.fillStyle = pattern;
+ ctx.translate(48, 0);
+ ctx.fillRect(-48, 0, 100, 50);
+ ctx.fillStyle = '#0f0';
+ ctx.fillRect(0, 0, 16, 50);
+ _assertPixel(canvas, 1,1, 0,255,0,255);
+ _assertPixel(canvas, 50,1, 0,255,0,255);
+ _assertPixel(canvas, 98,1, 0,255,0,255);
+ _assertPixel(canvas, 1,48, 0,255,0,255);
+ _assertPixel(canvas, 50,48, 0,255,0,255);
+ _assertPixel(canvas, 98,48, 0,255,0,255);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeaty.coord1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeaty.coord1.worker.js
new file mode 100644
index 0000000000..1701d3cc76
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeaty.coord1.worker.js
@@ -0,0 +1,48 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.pattern.paint.repeaty.coord1
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/red-16x16.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ var pattern = ctx.createPattern(bitmap, 'repeat-y');
+ ctx.fillStyle = pattern;
+ ctx.translate(48, 0);
+ ctx.fillRect(-48, 0, 100, 50);
+ ctx.fillStyle = '#0f0';
+ ctx.fillRect(0, 0, 16, 50);
+ _assertPixel(canvas, 1,1, 0,255,0,255);
+ _assertPixel(canvas, 50,1, 0,255,0,255);
+ _assertPixel(canvas, 98,1, 0,255,0,255);
+ _assertPixel(canvas, 1,48, 0,255,0,255);
+ _assertPixel(canvas, 50,48, 0,255,0,255);
+ _assertPixel(canvas, 98,48, 0,255,0,255);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeaty.outside.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeaty.outside.html
new file mode 100644
index 0000000000..b7fbd9eb87
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeaty.outside.html
@@ -0,0 +1,49 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.pattern.paint.repeaty.outside</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.pattern.paint.repeaty.outside</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/red-16x16.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ var pattern = ctx.createPattern(bitmap, 'repeat-y');
+ ctx.fillStyle = pattern;
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.fillStyle = '#0f0';
+ ctx.fillRect(0, 0, 16, 50);
+ _assertPixel(canvas, 1,1, 0,255,0,255);
+ _assertPixel(canvas, 98,1, 0,255,0,255);
+ _assertPixel(canvas, 1,48, 0,255,0,255);
+ _assertPixel(canvas, 98,48, 0,255,0,255);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeaty.outside.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeaty.outside.worker.js
new file mode 100644
index 0000000000..7242c8ff48
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.paint.repeaty.outside.worker.js
@@ -0,0 +1,45 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.pattern.paint.repeaty.outside
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/red-16x16.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ var pattern = ctx.createPattern(bitmap, 'repeat-y');
+ ctx.fillStyle = pattern;
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.fillStyle = '#0f0';
+ ctx.fillRect(0, 0, 16, 50);
+ _assertPixel(canvas, 1,1, 0,255,0,255);
+ _assertPixel(canvas, 98,1, 0,255,0,255);
+ _assertPixel(canvas, 1,48, 0,255,0,255);
+ _assertPixel(canvas, 98,48, 0,255,0,255);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.repeat.case.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.repeat.case.html
new file mode 100644
index 0000000000..5251f93c8f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.repeat.case.html
@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.pattern.repeat.case</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.pattern.repeat.case</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_dom("SYNTAX_ERR", function() { ctx.createPattern(canvas, "Repeat"); });
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.repeat.case.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.repeat.case.worker.js
new file mode 100644
index 0000000000..6a7dd8d6dd
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.repeat.case.worker.js
@@ -0,0 +1,23 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.pattern.repeat.case
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_dom("SYNTAX_ERR", function() { ctx.createPattern(canvas, "Repeat"); });
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.repeat.empty.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.repeat.empty.html
new file mode 100644
index 0000000000..76e54e9616
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.repeat.empty.html
@@ -0,0 +1,47 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.pattern.repeat.empty</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.pattern.repeat.empty</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/green-1x1.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ var pattern = ctx.createPattern(bitmap, "");
+ ctx.fillStyle = pattern;
+ ctx.fillRect(0, 0, 200, 50);
+ _assertPixel(canvas, 1,1, 0,255,0,255);
+ _assertPixel(canvas, 98,1, 0,255,0,255);
+ _assertPixel(canvas, 1,48, 0,255,0,255);
+ _assertPixel(canvas, 98,48, 0,255,0,255);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.repeat.empty.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.repeat.empty.worker.js
new file mode 100644
index 0000000000..e3048881e3
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.repeat.empty.worker.js
@@ -0,0 +1,43 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.pattern.repeat.empty
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/green-1x1.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ var pattern = ctx.createPattern(bitmap, "");
+ ctx.fillStyle = pattern;
+ ctx.fillRect(0, 0, 200, 50);
+ _assertPixel(canvas, 1,1, 0,255,0,255);
+ _assertPixel(canvas, 98,1, 0,255,0,255);
+ _assertPixel(canvas, 1,48, 0,255,0,255);
+ _assertPixel(canvas, 98,48, 0,255,0,255);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.repeat.null.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.repeat.null.html
new file mode 100644
index 0000000000..0e97c7aa67
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.repeat.null.html
@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.pattern.repeat.null</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.pattern.repeat.null</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assert(ctx.createPattern(canvas, null) != null, "ctx.createPattern(canvas, null) != null");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.repeat.null.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.repeat.null.worker.js
new file mode 100644
index 0000000000..57353f338c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.repeat.null.worker.js
@@ -0,0 +1,23 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.pattern.repeat.null
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assert(ctx.createPattern(canvas, null) != null, "ctx.createPattern(canvas, null) != null");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.repeat.nullsuffix.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.repeat.nullsuffix.html
new file mode 100644
index 0000000000..d5166d750b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.repeat.nullsuffix.html
@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.pattern.repeat.nullsuffix</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.pattern.repeat.nullsuffix</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_dom("SYNTAX_ERR", function() { ctx.createPattern(canvas, "repeat\0"); });
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.repeat.nullsuffix.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.repeat.nullsuffix.worker.js
new file mode 100644
index 0000000000..baafd4b43a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.repeat.nullsuffix.worker.js
@@ -0,0 +1,23 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.pattern.repeat.nullsuffix
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_dom("SYNTAX_ERR", function() { ctx.createPattern(canvas, "repeat\0"); });
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.repeat.undefined.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.repeat.undefined.html
new file mode 100644
index 0000000000..731ef86f83
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.repeat.undefined.html
@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.pattern.repeat.undefined</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.pattern.repeat.undefined</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_dom("SYNTAX_ERR", function() { ctx.createPattern(canvas, undefined); });
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.repeat.undefined.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.repeat.undefined.worker.js
new file mode 100644
index 0000000000..1474ac43dc
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.repeat.undefined.worker.js
@@ -0,0 +1,23 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.pattern.repeat.undefined
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_dom("SYNTAX_ERR", function() { ctx.createPattern(canvas, undefined); });
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.repeat.unrecognised.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.repeat.unrecognised.html
new file mode 100644
index 0000000000..793ed67a7c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.repeat.unrecognised.html
@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.pattern.repeat.unrecognised</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.pattern.repeat.unrecognised</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_dom("SYNTAX_ERR", function() { ctx.createPattern(canvas, "invalid"); });
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.repeat.unrecognised.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.repeat.unrecognised.worker.js
new file mode 100644
index 0000000000..076cba562c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.repeat.unrecognised.worker.js
@@ -0,0 +1,23 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.pattern.repeat.unrecognised
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_dom("SYNTAX_ERR", function() { ctx.createPattern(canvas, "invalid"); });
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.repeat.unrecognisednull.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.repeat.unrecognisednull.html
new file mode 100644
index 0000000000..59a0be4296
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.repeat.unrecognisednull.html
@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.pattern.repeat.unrecognisednull</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.pattern.repeat.unrecognisednull</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_dom("SYNTAX_ERR", function() { ctx.createPattern(canvas, "null"); });
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.repeat.unrecognisednull.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.repeat.unrecognisednull.worker.js
new file mode 100644
index 0000000000..0adfe9bf41
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.pattern.repeat.unrecognisednull.worker.js
@@ -0,0 +1,23 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.pattern.repeat.unrecognisednull
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_dom("SYNTAX_ERR", function() { ctx.createPattern(canvas, "null"); });
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.strokeStyle.default.html b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.strokeStyle.default.html
new file mode 100644
index 0000000000..70524cb6d9
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.strokeStyle.default.html
@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.strokeStyle.default</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.strokeStyle.default</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertSame(ctx.strokeStyle, '#000000', "ctx.strokeStyle", "'#000000'");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.strokeStyle.default.worker.js b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.strokeStyle.default.worker.js
new file mode 100644
index 0000000000..0d72f35264
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/fill-and-stroke-styles/2d.strokeStyle.default.worker.js
@@ -0,0 +1,23 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.strokeStyle.default
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertSame(ctx.strokeStyle, '#000000', "ctx.strokeStyle", "'#000000'");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.blur.exceptions.tentative.html b/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.blur.exceptions.tentative.html
new file mode 100644
index 0000000000..bc476476e4
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.blur.exceptions.tentative.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.filter.canvasFilterObject.blur.exceptions.tentative</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.filter.canvasFilterObject.blur.exceptions.tentative</h1>
+<p class="desc">Test exceptions on CanvasFilter() blur.object</p>
+
+
+<script>
+var t = async_test("Test exceptions on CanvasFilter() blur.object");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_js(TypeError, function() { ctx.filter = new CanvasFilter({filter: "gaussianBlur"}); });
+assert_throws_js(TypeError, function() { ctx.filter = new CanvasFilter({filter: "gaussianBlur", stdDeviation: undefined}); });
+assert_throws_js(TypeError, function() { ctx.filter = new CanvasFilter({filter: "gaussianBlur", stdDeviation: "foo"}); });
+assert_throws_js(TypeError, function() { ctx.filter = new CanvasFilter({filter: "gaussianBlur", stdDeviation: [1,2]}); });
+assert_throws_js(TypeError, function() { ctx.filter = new CanvasFilter({filter: "gaussianBlur", stdDeviation: NaN}); });
+assert_throws_js(TypeError, function() { ctx.filter = new CanvasFilter({filter: "gaussianBlur", stdDeviation: {}}); });
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.blur.exceptions.tentative.worker.js b/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.blur.exceptions.tentative.worker.js
new file mode 100644
index 0000000000..a44868f585
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.blur.exceptions.tentative.worker.js
@@ -0,0 +1,28 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.filter.canvasFilterObject.blur.exceptions.tentative
+// Description:Test exceptions on CanvasFilter() blur.object
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Test exceptions on CanvasFilter() blur.object");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_js(TypeError, function() { ctx.filter = new CanvasFilter({filter: "gaussianBlur"}); });
+assert_throws_js(TypeError, function() { ctx.filter = new CanvasFilter({filter: "gaussianBlur", stdDeviation: undefined}); });
+assert_throws_js(TypeError, function() { ctx.filter = new CanvasFilter({filter: "gaussianBlur", stdDeviation: "foo"}); });
+assert_throws_js(TypeError, function() { ctx.filter = new CanvasFilter({filter: "gaussianBlur", stdDeviation: [1,2]}); });
+assert_throws_js(TypeError, function() { ctx.filter = new CanvasFilter({filter: "gaussianBlur", stdDeviation: NaN}); });
+assert_throws_js(TypeError, function() { ctx.filter = new CanvasFilter({filter: "gaussianBlur", stdDeviation: {}}); });
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.colorMatrix.tentative.html b/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.colorMatrix.tentative.html
new file mode 100644
index 0000000000..ece8a52216
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.colorMatrix.tentative.html
@@ -0,0 +1,69 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.filter.canvasFilterObject.colorMatrix.tentative</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.filter.canvasFilterObject.colorMatrix.tentative</h1>
+<p class="desc">Test the functionality of ColorMatrix filters in CanvasFilter objects</p>
+
+
+<script>
+var t = async_test("Test the functionality of ColorMatrix filters in CanvasFilter objects");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: "colorMatrix", values: undefined}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: "colorMatrix", values: "foo"}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: "colorMatrix", values: null}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: "colorMatrix", values: [1, 2, 3]}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: "colorMatrix", values: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, "a"]}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: "colorMatrix", values: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, Infinity]}); });
+ctx.fillStyle = "#f00";
+ctx.filter = new CanvasFilter({filter: "colorMatrix", type: "hueRotate", values: 0});
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 10,10, 255,0,0,255, 2);
+ctx.filter = new CanvasFilter({filter: "colorMatrix", type: "hueRotate", values: 90});
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 10,10, 0,91,0,255, 2);
+ctx.filter = new CanvasFilter({filter: "colorMatrix", type: "hueRotate", values: 180});
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 10,10, 0,109,109,255, 2);
+ctx.filter = new CanvasFilter({filter: "colorMatrix", type: "hueRotate", values: 270});
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 10,10, 109,18,255,255, 2);
+ctx.filter = new CanvasFilter({filter: "colorMatrix", type: "saturate", values: 0.5});
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 10,10, 155,27,27,255, 2);
+ctx.clearRect(0, 0, 100, 50);
+ctx.filter = new CanvasFilter({filter: "colorMatrix", type: "luminanceToAlpha"});
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 10,10, 0,0,0,54, 2);
+ctx.filter = new CanvasFilter({filter: "colorMatrix", values: [
+ 0, 0, 0, 0, 0,
+ 1, 1, 1, 1, 0,
+ 0, 0, 0, 0, 0,
+ 0, 0, 0, 1, 0
+]});
+ctx.fillRect(0, 0, 50, 25);
+ctx.fillStyle = "#0f0";
+ctx.fillRect(50, 0, 50, 25);
+ctx.fillStyle = "#00f";
+ctx.fillRect(0, 25, 50, 25);
+ctx.fillStyle = "#fff";
+ctx.fillRect(50, 25, 50, 25);
+_assertPixelApprox(canvas, 10,10, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 60,10, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 10,30, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 60,30, 0,255,0,255, 2);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.colorMatrix.tentative.worker.js b/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.colorMatrix.tentative.worker.js
new file mode 100644
index 0000000000..105f312b9c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.colorMatrix.tentative.worker.js
@@ -0,0 +1,65 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.filter.canvasFilterObject.colorMatrix.tentative
+// Description:Test the functionality of ColorMatrix filters in CanvasFilter objects
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Test the functionality of ColorMatrix filters in CanvasFilter objects");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: "colorMatrix", values: undefined}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: "colorMatrix", values: "foo"}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: "colorMatrix", values: null}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: "colorMatrix", values: [1, 2, 3]}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: "colorMatrix", values: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, "a"]}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: "colorMatrix", values: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, Infinity]}); });
+ctx.fillStyle = "#f00";
+ctx.filter = new CanvasFilter({filter: "colorMatrix", type: "hueRotate", values: 0});
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 10,10, 255,0,0,255, 2);
+ctx.filter = new CanvasFilter({filter: "colorMatrix", type: "hueRotate", values: 90});
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 10,10, 0,91,0,255, 2);
+ctx.filter = new CanvasFilter({filter: "colorMatrix", type: "hueRotate", values: 180});
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 10,10, 0,109,109,255, 2);
+ctx.filter = new CanvasFilter({filter: "colorMatrix", type: "hueRotate", values: 270});
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 10,10, 109,18,255,255, 2);
+ctx.filter = new CanvasFilter({filter: "colorMatrix", type: "saturate", values: 0.5});
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 10,10, 155,27,27,255, 2);
+ctx.clearRect(0, 0, 100, 50);
+ctx.filter = new CanvasFilter({filter: "colorMatrix", type: "luminanceToAlpha"});
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 10,10, 0,0,0,54, 2);
+ctx.filter = new CanvasFilter({filter: "colorMatrix", values: [
+ 0, 0, 0, 0, 0,
+ 1, 1, 1, 1, 0,
+ 0, 0, 0, 0, 0,
+ 0, 0, 0, 1, 0
+]});
+ctx.fillRect(0, 0, 50, 25);
+ctx.fillStyle = "#0f0";
+ctx.fillRect(50, 0, 50, 25);
+ctx.fillStyle = "#00f";
+ctx.fillRect(0, 25, 50, 25);
+ctx.fillStyle = "#fff";
+ctx.fillRect(50, 25, 50, 25);
+_assertPixelApprox(canvas, 10,10, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 60,10, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 10,30, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 60,30, 0,255,0,255, 2);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.discrete.tentative.html b/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.discrete.tentative.html
new file mode 100644
index 0000000000..eaaa12f0a7
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.discrete.tentative.html
@@ -0,0 +1,67 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.filter.canvasFilterObject.componentTransfer.discrete.tentative</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.filter.canvasFilterObject.componentTransfer.discrete.tentative</h1>
+<p class="desc">Test pixels on CanvasFilter() componentTransfer with discrete type</p>
+
+
+<script>
+var t = async_test("Test pixels on CanvasFilter() componentTransfer with discrete type");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+// From https://www.w3.org/TR/SVG11/filters.html#feComponentTransferElement
+function getTransformedValue(C, V) {
+ // Get the right interval
+ const n = V.length;
+ const k = C == 1 ? n - 1 : Math.floor(C * n);
+ return V[k];
+}
+
+function getColor(inputColor, tableValues) {
+ const result = [0, 0, 0];
+ for (const i in inputColor) {
+ const C = inputColor[i]/255;
+ const Cprime = getTransformedValue(C, tableValues[i]);
+ result[i] = Math.max(0, Math.min(1, Cprime)) * 255;
+ }
+ return result;
+}
+
+tableValuesR = [0, 0, 1, 1];
+tableValuesG = [2, 0, 0.5, 3];
+tableValuesB = [1, -1, 5, 0];
+ctx.filter = new CanvasFilter({filter: "componentTransfer",
+ funcR: {type: "discrete", tableValues: tableValuesR},
+ funcG: {type: "discrete", tableValues: tableValuesG},
+ funcB: {type: "discrete", tableValues: tableValuesB},
+});
+
+const inputColors = [
+ [255, 255, 255],
+ [0, 0, 0],
+ [127, 0, 34],
+ [252, 186, 3],
+ [50, 68, 87],
+];
+
+for (const color of inputColors) {
+ let outputColor = getColor(color, [tableValuesR, tableValuesG, tableValuesB]);
+ ctx.fillStyle = `rgb(${color[0]}, ${color[1]}, ${color[2]})`;
+ ctx.fillRect(0, 0, 10, 10);
+ _assertPixelApprox(canvas, 5, 5, outputColor[0],outputColor[1],outputColor[2],255, 2);
+}
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.discrete.tentative.worker.js b/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.discrete.tentative.worker.js
new file mode 100644
index 0000000000..f1274f1425
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.discrete.tentative.worker.js
@@ -0,0 +1,63 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.filter.canvasFilterObject.componentTransfer.discrete.tentative
+// Description:Test pixels on CanvasFilter() componentTransfer with discrete type
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Test pixels on CanvasFilter() componentTransfer with discrete type");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+// From https://www.w3.org/TR/SVG11/filters.html#feComponentTransferElement
+function getTransformedValue(C, V) {
+ // Get the right interval
+ const n = V.length;
+ const k = C == 1 ? n - 1 : Math.floor(C * n);
+ return V[k];
+}
+
+function getColor(inputColor, tableValues) {
+ const result = [0, 0, 0];
+ for (const i in inputColor) {
+ const C = inputColor[i]/255;
+ const Cprime = getTransformedValue(C, tableValues[i]);
+ result[i] = Math.max(0, Math.min(1, Cprime)) * 255;
+ }
+ return result;
+}
+
+tableValuesR = [0, 0, 1, 1];
+tableValuesG = [2, 0, 0.5, 3];
+tableValuesB = [1, -1, 5, 0];
+ctx.filter = new CanvasFilter({filter: "componentTransfer",
+ funcR: {type: "discrete", tableValues: tableValuesR},
+ funcG: {type: "discrete", tableValues: tableValuesG},
+ funcB: {type: "discrete", tableValues: tableValuesB},
+});
+
+const inputColors = [
+ [255, 255, 255],
+ [0, 0, 0],
+ [127, 0, 34],
+ [252, 186, 3],
+ [50, 68, 87],
+];
+
+for (const color of inputColors) {
+ let outputColor = getColor(color, [tableValuesR, tableValuesG, tableValuesB]);
+ ctx.fillStyle = `rgb(${color[0]}, ${color[1]}, ${color[2]})`;
+ ctx.fillRect(0, 0, 10, 10);
+ _assertPixelApprox(canvas, 5, 5, outputColor[0],outputColor[1],outputColor[2],255, 2);
+}
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.gamma.tentative.html b/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.gamma.tentative.html
new file mode 100644
index 0000000000..6c5b04ab8a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.gamma.tentative.html
@@ -0,0 +1,58 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.filter.canvasFilterObject.componentTransfer.gamma.tentative</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.filter.canvasFilterObject.componentTransfer.gamma.tentative</h1>
+<p class="desc">Test pixels on CanvasFilter() componentTransfer with gamma type</p>
+
+
+<script>
+var t = async_test("Test pixels on CanvasFilter() componentTransfer with gamma type");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+// From https://www.w3.org/TR/SVG11/filters.html#feComponentTransferElement
+function getColor(inputColor, amplitude, exponent, offset) {
+ return [
+ Math.max(0, Math.min(1, Math.pow(inputColor[0]/255, exponent[0]) * amplitude[0] + offset[0])) * 255,
+ Math.max(0, Math.min(1, Math.pow(inputColor[1]/255, exponent[1]) * amplitude[1] + offset[1])) * 255,
+ Math.max(0, Math.min(1, Math.pow(inputColor[2]/255, exponent[2]) * amplitude[2] + offset[2])) * 255,
+ ];
+}
+
+const amplitudes = [2, 1.1, 0.5];
+const exponents = [5, 3, 1];
+const offsets = [0.25, 0, 0.5];
+ctx.filter = new CanvasFilter({filter: "componentTransfer",
+ funcR: {type: "gamma", amplitude: amplitudes[0], exponent: exponents[0], offset: offsets[0]},
+ funcG: {type: "gamma", amplitude: amplitudes[1], exponent: exponents[1], offset: offsets[1]},
+ funcB: {type: "gamma", amplitude: amplitudes[2], exponent: exponents[2], offset: offsets[2]},
+});
+
+const inputColors = [
+ [255, 255, 255],
+ [0, 0, 0],
+ [127, 0, 34],
+ [252, 186, 3],
+ [50, 68, 87],
+];
+
+for (const color of inputColors) {
+ let outputColor = getColor(color, amplitudes, exponents, offsets);
+ ctx.fillStyle = `rgb(${color[0]}, ${color[1]}, ${color[2]})`;
+ ctx.fillRect(0, 0, 10, 10);
+ _assertPixelApprox(canvas, 5, 5, outputColor[0],outputColor[1],outputColor[2],255, 2);
+}
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.gamma.tentative.worker.js b/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.gamma.tentative.worker.js
new file mode 100644
index 0000000000..14bf50f89d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.gamma.tentative.worker.js
@@ -0,0 +1,54 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.filter.canvasFilterObject.componentTransfer.gamma.tentative
+// Description:Test pixels on CanvasFilter() componentTransfer with gamma type
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Test pixels on CanvasFilter() componentTransfer with gamma type");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+// From https://www.w3.org/TR/SVG11/filters.html#feComponentTransferElement
+function getColor(inputColor, amplitude, exponent, offset) {
+ return [
+ Math.max(0, Math.min(1, Math.pow(inputColor[0]/255, exponent[0]) * amplitude[0] + offset[0])) * 255,
+ Math.max(0, Math.min(1, Math.pow(inputColor[1]/255, exponent[1]) * amplitude[1] + offset[1])) * 255,
+ Math.max(0, Math.min(1, Math.pow(inputColor[2]/255, exponent[2]) * amplitude[2] + offset[2])) * 255,
+ ];
+}
+
+const amplitudes = [2, 1.1, 0.5];
+const exponents = [5, 3, 1];
+const offsets = [0.25, 0, 0.5];
+ctx.filter = new CanvasFilter({filter: "componentTransfer",
+ funcR: {type: "gamma", amplitude: amplitudes[0], exponent: exponents[0], offset: offsets[0]},
+ funcG: {type: "gamma", amplitude: amplitudes[1], exponent: exponents[1], offset: offsets[1]},
+ funcB: {type: "gamma", amplitude: amplitudes[2], exponent: exponents[2], offset: offsets[2]},
+});
+
+const inputColors = [
+ [255, 255, 255],
+ [0, 0, 0],
+ [127, 0, 34],
+ [252, 186, 3],
+ [50, 68, 87],
+];
+
+for (const color of inputColors) {
+ let outputColor = getColor(color, amplitudes, exponents, offsets);
+ ctx.fillStyle = `rgb(${color[0]}, ${color[1]}, ${color[2]})`;
+ ctx.fillRect(0, 0, 10, 10);
+ _assertPixelApprox(canvas, 5, 5, outputColor[0],outputColor[1],outputColor[2],255, 2);
+}
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.identity.tentative.html b/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.identity.tentative.html
new file mode 100644
index 0000000000..a6a7a3615a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.identity.tentative.html
@@ -0,0 +1,45 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.filter.canvasFilterObject.componentTransfer.identity.tentative</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.filter.canvasFilterObject.componentTransfer.identity.tentative</h1>
+<p class="desc">Test pixels on CanvasFilter() componentTransfer with identity type</p>
+
+
+<script>
+var t = async_test("Test pixels on CanvasFilter() componentTransfer with identity type");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.filter = new CanvasFilter({filter: "componentTransfer",
+ funcR: {type: "identity"},
+ funcG: {type: "identity"},
+ funcB: {type: "identity"},
+});
+
+const inputColors = [
+ [255, 255, 255],
+ [0, 0, 0],
+ [127, 0, 34],
+ [252, 186, 3],
+ [50, 68, 87],
+];
+
+for (const color of inputColors) {
+ ctx.fillStyle = `rgba(${color[0]}, ${color[1]}, ${color[2]}, 1)`,
+ ctx.fillRect(0, 0, 10, 10);
+ _assertPixel(canvas, 5, 5, color[0],color[1],color[2],255);
+}
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.identity.tentative.worker.js b/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.identity.tentative.worker.js
new file mode 100644
index 0000000000..ae749673f4
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.identity.tentative.worker.js
@@ -0,0 +1,41 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.filter.canvasFilterObject.componentTransfer.identity.tentative
+// Description:Test pixels on CanvasFilter() componentTransfer with identity type
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Test pixels on CanvasFilter() componentTransfer with identity type");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.filter = new CanvasFilter({filter: "componentTransfer",
+ funcR: {type: "identity"},
+ funcG: {type: "identity"},
+ funcB: {type: "identity"},
+});
+
+const inputColors = [
+ [255, 255, 255],
+ [0, 0, 0],
+ [127, 0, 34],
+ [252, 186, 3],
+ [50, 68, 87],
+];
+
+for (const color of inputColors) {
+ ctx.fillStyle = `rgba(${color[0]}, ${color[1]}, ${color[2]}, 1)`,
+ ctx.fillRect(0, 0, 10, 10);
+ _assertPixel(canvas, 5, 5, color[0],color[1],color[2],255);
+}
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.linear.tentative.html b/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.linear.tentative.html
new file mode 100644
index 0000000000..f2218b7a1d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.linear.tentative.html
@@ -0,0 +1,57 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.filter.canvasFilterObject.componentTransfer.linear.tentative</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.filter.canvasFilterObject.componentTransfer.linear.tentative</h1>
+<p class="desc">Test pixels on CanvasFilter() componentTransfer with linear type</p>
+
+
+<script>
+var t = async_test("Test pixels on CanvasFilter() componentTransfer with linear type");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+// From https://www.w3.org/TR/SVG11/filters.html#feComponentTransferElement
+function getColor(inputColor, slopes, intercepts) {
+ return [
+ Math.max(0, Math.min(1, inputColor[0]/255 * slopes[0] + intercepts[0])) * 255,
+ Math.max(0, Math.min(1, inputColor[1]/255 * slopes[1] + intercepts[1])) * 255,
+ Math.max(0, Math.min(1, inputColor[2]/255 * slopes[2] + intercepts[2])) * 255,
+ ];
+}
+
+const slopes = [0.5, 1.2, -0.2];
+const intercepts = [0.25, 0, 0.5];
+ctx.filter = new CanvasFilter({filter: "componentTransfer",
+ funcR: {type: "linear", slope: slopes[0], intercept: intercepts[0]},
+ funcG: {type: "linear", slope: slopes[1], intercept: intercepts[1]},
+ funcB: {type: "linear", slope: slopes[2], intercept: intercepts[2]},
+});
+
+const inputColors = [
+ [255, 255, 255],
+ [0, 0, 0],
+ [127, 0, 34],
+ [252, 186, 3],
+ [50, 68, 87],
+];
+
+for (const color of inputColors) {
+ let outputColor = getColor(color, slopes, intercepts);
+ ctx.fillStyle = `rgb(${color[0]}, ${color[1]}, ${color[2]})`;
+ ctx.fillRect(0, 0, 10, 10);
+ _assertPixelApprox(canvas, 5, 5, outputColor[0],outputColor[1],outputColor[2],255, 2);
+}
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.linear.tentative.worker.js b/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.linear.tentative.worker.js
new file mode 100644
index 0000000000..5117d4a1b3
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.linear.tentative.worker.js
@@ -0,0 +1,53 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.filter.canvasFilterObject.componentTransfer.linear.tentative
+// Description:Test pixels on CanvasFilter() componentTransfer with linear type
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Test pixels on CanvasFilter() componentTransfer with linear type");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+// From https://www.w3.org/TR/SVG11/filters.html#feComponentTransferElement
+function getColor(inputColor, slopes, intercepts) {
+ return [
+ Math.max(0, Math.min(1, inputColor[0]/255 * slopes[0] + intercepts[0])) * 255,
+ Math.max(0, Math.min(1, inputColor[1]/255 * slopes[1] + intercepts[1])) * 255,
+ Math.max(0, Math.min(1, inputColor[2]/255 * slopes[2] + intercepts[2])) * 255,
+ ];
+}
+
+const slopes = [0.5, 1.2, -0.2];
+const intercepts = [0.25, 0, 0.5];
+ctx.filter = new CanvasFilter({filter: "componentTransfer",
+ funcR: {type: "linear", slope: slopes[0], intercept: intercepts[0]},
+ funcG: {type: "linear", slope: slopes[1], intercept: intercepts[1]},
+ funcB: {type: "linear", slope: slopes[2], intercept: intercepts[2]},
+});
+
+const inputColors = [
+ [255, 255, 255],
+ [0, 0, 0],
+ [127, 0, 34],
+ [252, 186, 3],
+ [50, 68, 87],
+];
+
+for (const color of inputColors) {
+ let outputColor = getColor(color, slopes, intercepts);
+ ctx.fillStyle = `rgb(${color[0]}, ${color[1]}, ${color[2]})`;
+ ctx.fillRect(0, 0, 10, 10);
+ _assertPixelApprox(canvas, 5, 5, outputColor[0],outputColor[1],outputColor[2],255, 2);
+}
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.table.tentative.html b/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.table.tentative.html
new file mode 100644
index 0000000000..9c4c16db85
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.table.tentative.html
@@ -0,0 +1,67 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.filter.canvasFilterObject.componentTransfer.table.tentative</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.filter.canvasFilterObject.componentTransfer.table.tentative</h1>
+<p class="desc">Test pixels on CanvasFilter() componentTransfer with table type</p>
+
+
+<script>
+var t = async_test("Test pixels on CanvasFilter() componentTransfer with table type");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+// From https://www.w3.org/TR/SVG11/filters.html#feComponentTransferElement
+function getTransformedValue(C, V) {
+ // Get the right interval
+ const n = V.length - 1;
+ const k = C == 1 ? n - 1 : Math.floor(C * n);
+ return V[k] + (C - k/n) * n * (V[k + 1] - V[k]);
+}
+
+function getColor(inputColor, tableValues) {
+ const result = [0, 0, 0];
+ for (const i in inputColor) {
+ const C = inputColor[i]/255;
+ const Cprime = getTransformedValue(C, tableValues[i]);
+ result[i] = Math.max(0, Math.min(1, Cprime)) * 255;
+ }
+ return result;
+}
+
+tableValuesR = [0, 0, 1, 1];
+tableValuesG = [2, 0, 0.5, 3];
+tableValuesB = [1, -1, 5, 0];
+ctx.filter = new CanvasFilter({filter: "componentTransfer",
+ funcR: {type: "table", tableValues: tableValuesR},
+ funcG: {type: "table", tableValues: tableValuesG},
+ funcB: {type: "table", tableValues: tableValuesB},
+});
+
+const inputColors = [
+ [255, 255, 255],
+ [0, 0, 0],
+ [127, 0, 34],
+ [252, 186, 3],
+ [50, 68, 87],
+];
+
+for (const color of inputColors) {
+ let outputColor = getColor(color, [tableValuesR, tableValuesG, tableValuesB]);
+ ctx.fillStyle = `rgb(${color[0]}, ${color[1]}, ${color[2]})`;
+ ctx.fillRect(0, 0, 10, 10);
+ _assertPixelApprox(canvas, 5, 5, outputColor[0],outputColor[1],outputColor[2],255, 2);
+}
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.table.tentative.worker.js b/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.table.tentative.worker.js
new file mode 100644
index 0000000000..e2463eb9e7
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.table.tentative.worker.js
@@ -0,0 +1,63 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.filter.canvasFilterObject.componentTransfer.table.tentative
+// Description:Test pixels on CanvasFilter() componentTransfer with table type
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Test pixels on CanvasFilter() componentTransfer with table type");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+// From https://www.w3.org/TR/SVG11/filters.html#feComponentTransferElement
+function getTransformedValue(C, V) {
+ // Get the right interval
+ const n = V.length - 1;
+ const k = C == 1 ? n - 1 : Math.floor(C * n);
+ return V[k] + (C - k/n) * n * (V[k + 1] - V[k]);
+}
+
+function getColor(inputColor, tableValues) {
+ const result = [0, 0, 0];
+ for (const i in inputColor) {
+ const C = inputColor[i]/255;
+ const Cprime = getTransformedValue(C, tableValues[i]);
+ result[i] = Math.max(0, Math.min(1, Cprime)) * 255;
+ }
+ return result;
+}
+
+tableValuesR = [0, 0, 1, 1];
+tableValuesG = [2, 0, 0.5, 3];
+tableValuesB = [1, -1, 5, 0];
+ctx.filter = new CanvasFilter({filter: "componentTransfer",
+ funcR: {type: "table", tableValues: tableValuesR},
+ funcG: {type: "table", tableValues: tableValuesG},
+ funcB: {type: "table", tableValues: tableValuesB},
+});
+
+const inputColors = [
+ [255, 255, 255],
+ [0, 0, 0],
+ [127, 0, 34],
+ [252, 186, 3],
+ [50, 68, 87],
+];
+
+for (const color of inputColors) {
+ let outputColor = getColor(color, [tableValuesR, tableValuesG, tableValuesB]);
+ ctx.fillStyle = `rgb(${color[0]}, ${color[1]}, ${color[2]})`;
+ ctx.fillRect(0, 0, 10, 10);
+ _assertPixelApprox(canvas, 5, 5, outputColor[0],outputColor[1],outputColor[2],255, 2);
+}
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.convolveMatrix.exceptions.tentative.html b/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.convolveMatrix.exceptions.tentative.html
new file mode 100644
index 0000000000..b44b074af1
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.convolveMatrix.exceptions.tentative.html
@@ -0,0 +1,37 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.filter.canvasFilterObject.convolveMatrix.exceptions.tentative</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.filter.canvasFilterObject.convolveMatrix.exceptions.tentative</h1>
+<p class="desc">Test exceptions on CanvasFilter() convolveMatrix</p>
+
+
+<script>
+var t = async_test("Test exceptions on CanvasFilter() convolveMatrix");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: "convolveMatrix"}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: "convolveMatrix", divisor: 2}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: "convolveMatrix", kernelMatrix: null}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: "convolveMatrix", kernelMatrix: 1}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: "convolveMatrix", kernelMatrix: [[1, 0], [0]]}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: "convolveMatrix", kernelMatrix: [[1, "a"], [0]]}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: "convolveMatrix", kernelMatrix: [[1, 0], 0]}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: "convolveMatrix", kernelMatrix: [[1, 0], [0, Infinity]]}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: "convolveMatrix", kernelMatrix: []}); });
+// This should not throw an error
+ctx.filter = new CanvasFilter({filter: "convolveMatrix", kernelMatrix: [[]]});
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.convolveMatrix.exceptions.tentative.worker.js b/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.convolveMatrix.exceptions.tentative.worker.js
new file mode 100644
index 0000000000..be361ee7aa
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.convolveMatrix.exceptions.tentative.worker.js
@@ -0,0 +1,33 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.filter.canvasFilterObject.convolveMatrix.exceptions.tentative
+// Description:Test exceptions on CanvasFilter() convolveMatrix
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Test exceptions on CanvasFilter() convolveMatrix");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: "convolveMatrix"}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: "convolveMatrix", divisor: 2}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: "convolveMatrix", kernelMatrix: null}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: "convolveMatrix", kernelMatrix: 1}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: "convolveMatrix", kernelMatrix: [[1, 0], [0]]}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: "convolveMatrix", kernelMatrix: [[1, "a"], [0]]}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: "convolveMatrix", kernelMatrix: [[1, 0], 0]}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: "convolveMatrix", kernelMatrix: [[1, 0], [0, Infinity]]}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: "convolveMatrix", kernelMatrix: []}); });
+// This should not throw an error
+ctx.filter = new CanvasFilter({filter: "convolveMatrix", kernelMatrix: [[]]});
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.tentative.html b/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.tentative.html
new file mode 100644
index 0000000000..e4e06f27d2
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.tentative.html
@@ -0,0 +1,47 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.filter.canvasFilterObject.tentative</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.filter.canvasFilterObject.tentative</h1>
+<p class="desc">Test CanvasFilter() object</p>
+
+
+<script>
+var t = async_test("Test CanvasFilter() object");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assert(ctx.filter == 'none', "ctx.filter == 'none'");
+ctx.filter = 'blur(5px)';
+_assert(ctx.filter == 'blur(5px)', "ctx.filter == 'blur(5px)'");
+ctx.filter = new CanvasFilter({filter: "gaussianBlur", stdDeviation: 5});
+_assert(ctx.filter.toString() == '[object CanvasFilter]', "ctx.filter.toString() == '[object CanvasFilter]'");
+ctx.filter = new CanvasFilter([
+ {filter: "gaussianBlur", stdDeviation: 5},
+ {filter: "gaussianBlur", stdDeviation: 10}
+]);
+_assert(ctx.filter.toString() == '[object CanvasFilter]', "ctx.filter.toString() == '[object CanvasFilter]'");
+var canvas2 = new OffscreenCanvas(100, 50);
+var ctx2 = canvas2.getContext('2d');
+ctx2.filter = ctx.filter;
+_assert(ctx.filter.toString() == '[object CanvasFilter]', "ctx.filter.toString() == '[object CanvasFilter]'");
+ctx.filter = 'blur(5px)';
+_assert(ctx.filter == 'blur(5px)', "ctx.filter == 'blur(5px)'");
+ctx.filter = 'none';
+_assert(ctx.filter == 'none', "ctx.filter == 'none'");
+ctx.filter = new CanvasFilter({filter: "gaussianBlur", stdDeviation: 5});
+ctx.filter = "this string is not a filter and should do nothing";
+_assert(ctx.filter.toString() == '[object CanvasFilter]', "ctx.filter.toString() == '[object CanvasFilter]'");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.tentative.worker.js b/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.tentative.worker.js
new file mode 100644
index 0000000000..30772a39d1
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.tentative.worker.js
@@ -0,0 +1,43 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.filter.canvasFilterObject.tentative
+// Description:Test CanvasFilter() object
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Test CanvasFilter() object");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assert(ctx.filter == 'none', "ctx.filter == 'none'");
+ctx.filter = 'blur(5px)';
+_assert(ctx.filter == 'blur(5px)', "ctx.filter == 'blur(5px)'");
+ctx.filter = new CanvasFilter({filter: "gaussianBlur", stdDeviation: 5});
+_assert(ctx.filter.toString() == '[object CanvasFilter]', "ctx.filter.toString() == '[object CanvasFilter]'");
+ctx.filter = new CanvasFilter([
+ {filter: "gaussianBlur", stdDeviation: 5},
+ {filter: "gaussianBlur", stdDeviation: 10}
+]);
+_assert(ctx.filter.toString() == '[object CanvasFilter]', "ctx.filter.toString() == '[object CanvasFilter]'");
+var canvas2 = new OffscreenCanvas(100, 50);
+var ctx2 = canvas2.getContext('2d');
+ctx2.filter = ctx.filter;
+_assert(ctx.filter.toString() == '[object CanvasFilter]', "ctx.filter.toString() == '[object CanvasFilter]'");
+ctx.filter = 'blur(5px)';
+_assert(ctx.filter == 'blur(5px)', "ctx.filter == 'blur(5px)'");
+ctx.filter = 'none';
+_assert(ctx.filter == 'none', "ctx.filter == 'none'");
+ctx.filter = new CanvasFilter({filter: "gaussianBlur", stdDeviation: 5});
+ctx.filter = "this string is not a filter and should do nothing";
+_assert(ctx.filter.toString() == '[object CanvasFilter]', "ctx.filter.toString() == '[object CanvasFilter]'");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.turbulence.inputTypes.tentative.html b/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.turbulence.inputTypes.tentative.html
new file mode 100644
index 0000000000..d5123476b5
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.turbulence.inputTypes.tentative.html
@@ -0,0 +1,130 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.filter.canvasFilterObject.turbulence.inputTypes.tentative</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.filter.canvasFilterObject.turbulence.inputTypes.tentative</h1>
+<p class="desc">Test exceptions on CanvasFilter() turbulence object</p>
+
+
+<script>
+var t = async_test("Test exceptions on CanvasFilter() turbulence object");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+const errorTestCases = [
+ {baseFrequency: {}},
+ {baseFrequency: -1},
+ {baseFrequency: [0, -1]},
+ {baseFrequency: NaN},
+ {baseFrequency: Infinity},
+ {baseFrequency: undefined},
+ {baseFrequency: -Infinity},
+ {baseFrequency: "test"},
+
+ {numOctaves: {}},
+ {numOctaves: -1},
+ {numOctaves: NaN},
+ {numOctaves: Infinity},
+ {numOctaves: undefined},
+ {numOctaves: -Infinity},
+ {numOctaves: [1, 1]},
+ {numOctaves: "test"},
+
+ {seed: {}},
+ {seed: NaN},
+ {seed: Infinity},
+ {seed: undefined},
+ {seed: -Infinity},
+ {seed: [1, 1]},
+ {seed: "test"},
+
+ {stitchTiles: {}},
+ {stitchTiles: NaN},
+ {stitchTiles: Infinity},
+ {stitchTiles: undefined},
+ {stitchTiles: -Infinity},
+ {stitchTiles: [1, 1]},
+ {stitchTiles: "test"},
+ {stitchTiles: null},
+ {stitchTiles: []},
+ {stitchTiles: [10]},
+ {stitchTiles: 30},
+ {stitchTiles: false},
+ {stitchTiles: true},
+ {stitchTiles: "10"},
+ {stitchTiles: -1},
+
+ {type: {}},
+ {type: NaN},
+ {type: Infinity},
+ {type: undefined},
+ {type: -Infinity},
+ {type: [1, 1]},
+ {type: "test"},
+ {type: null},
+ {type: []},
+ {type: [10]},
+ {type: 30},
+ {type: false},
+ {type: true},
+ {type: "10"},
+ {type: -1},
+]
+
+// null and [] = 0 when parsed as number
+const workingTestCases = [
+ {baseFrequency: null},
+ {baseFrequency: []},
+ {baseFrequency: [10]},
+ {baseFrequency: [10, 3]},
+ {baseFrequency: 30},
+ {baseFrequency: false},
+ {baseFrequency: true},
+ {baseFrequency: "10"},
+
+ {numOctaves: null},
+ {numOctaves: []},
+ {numOctaves: [10]},
+ {numOctaves: 30},
+ {numOctaves: false},
+ {numOctaves: true},
+ {numOctaves: "10"},
+
+ {seed: null},
+ {seed: []},
+ {seed: [10]},
+ {seed: 30},
+ {seed: false},
+ {seed: true},
+ {seed: "10"},
+ {seed: -1},
+
+ {stitchTiles: "stitch"},
+ {stitchTiles: "noStitch"},
+
+ {type: "fractalNoise"},
+ {type: "turbulence"},
+]
+
+for (testCase of errorTestCases) {
+ const filterOptions = {...{filter: "turbulence"}, ...testCase};
+ assert_throws_js(TypeError, function() { CanvasFilter(filterOptions); });
+}
+
+for (testCase of workingTestCases) {
+ const filterOptions = {...{filter: "turbulence"}, ...testCase};
+ _assert(new CanvasFilter(filterOptions) != null, "new CanvasFilter(filterOptions) != null");
+}
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.turbulence.inputTypes.tentative.worker.js b/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.turbulence.inputTypes.tentative.worker.js
new file mode 100644
index 0000000000..bd1cd162fe
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.turbulence.inputTypes.tentative.worker.js
@@ -0,0 +1,126 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.filter.canvasFilterObject.turbulence.inputTypes.tentative
+// Description:Test exceptions on CanvasFilter() turbulence object
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Test exceptions on CanvasFilter() turbulence object");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+const errorTestCases = [
+ {baseFrequency: {}},
+ {baseFrequency: -1},
+ {baseFrequency: [0, -1]},
+ {baseFrequency: NaN},
+ {baseFrequency: Infinity},
+ {baseFrequency: undefined},
+ {baseFrequency: -Infinity},
+ {baseFrequency: "test"},
+
+ {numOctaves: {}},
+ {numOctaves: -1},
+ {numOctaves: NaN},
+ {numOctaves: Infinity},
+ {numOctaves: undefined},
+ {numOctaves: -Infinity},
+ {numOctaves: [1, 1]},
+ {numOctaves: "test"},
+
+ {seed: {}},
+ {seed: NaN},
+ {seed: Infinity},
+ {seed: undefined},
+ {seed: -Infinity},
+ {seed: [1, 1]},
+ {seed: "test"},
+
+ {stitchTiles: {}},
+ {stitchTiles: NaN},
+ {stitchTiles: Infinity},
+ {stitchTiles: undefined},
+ {stitchTiles: -Infinity},
+ {stitchTiles: [1, 1]},
+ {stitchTiles: "test"},
+ {stitchTiles: null},
+ {stitchTiles: []},
+ {stitchTiles: [10]},
+ {stitchTiles: 30},
+ {stitchTiles: false},
+ {stitchTiles: true},
+ {stitchTiles: "10"},
+ {stitchTiles: -1},
+
+ {type: {}},
+ {type: NaN},
+ {type: Infinity},
+ {type: undefined},
+ {type: -Infinity},
+ {type: [1, 1]},
+ {type: "test"},
+ {type: null},
+ {type: []},
+ {type: [10]},
+ {type: 30},
+ {type: false},
+ {type: true},
+ {type: "10"},
+ {type: -1},
+]
+
+// null and [] = 0 when parsed as number
+const workingTestCases = [
+ {baseFrequency: null},
+ {baseFrequency: []},
+ {baseFrequency: [10]},
+ {baseFrequency: [10, 3]},
+ {baseFrequency: 30},
+ {baseFrequency: false},
+ {baseFrequency: true},
+ {baseFrequency: "10"},
+
+ {numOctaves: null},
+ {numOctaves: []},
+ {numOctaves: [10]},
+ {numOctaves: 30},
+ {numOctaves: false},
+ {numOctaves: true},
+ {numOctaves: "10"},
+
+ {seed: null},
+ {seed: []},
+ {seed: [10]},
+ {seed: 30},
+ {seed: false},
+ {seed: true},
+ {seed: "10"},
+ {seed: -1},
+
+ {stitchTiles: "stitch"},
+ {stitchTiles: "noStitch"},
+
+ {type: "fractalNoise"},
+ {type: "turbulence"},
+]
+
+for (testCase of errorTestCases) {
+ const filterOptions = {...{filter: "turbulence"}, ...testCase};
+ assert_throws_js(TypeError, function() { CanvasFilter(filterOptions); });
+}
+
+for (testCase of workingTestCases) {
+ const filterOptions = {...{filter: "turbulence"}, ...testCase};
+ _assert(new CanvasFilter(filterOptions) != null, "new CanvasFilter(filterOptions) != null");
+}
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.value.html b/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.value.html
new file mode 100644
index 0000000000..8f06eb42fa
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.value.html
@@ -0,0 +1,56 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.filter.value</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.filter.value</h1>
+<p class="desc">test if ctx.filter works correctly</p>
+
+
+<script>
+var t = async_test("test if ctx.filter works correctly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assert(ctx.filter == 'none', "ctx.filter == 'none'");
+ctx.filter = 'blur(5px)';
+_assert(ctx.filter == 'blur(5px)', "ctx.filter == 'blur(5px)'");
+ctx.save();
+ctx.filter = 'none';
+_assert(ctx.filter == 'none', "ctx.filter == 'none'");
+ctx.restore();
+_assert(ctx.filter == 'blur(5px)', "ctx.filter == 'blur(5px)'");
+
+ctx.filter = 'blur(10)';
+_assert(ctx.filter == 'blur(5px)', "ctx.filter == 'blur(5px)'");
+ctx.filter = 'blur 10px';
+_assert(ctx.filter == 'blur(5px)', "ctx.filter == 'blur(5px)'");
+
+ctx.filter = 'inherit';
+_assert(ctx.filter == 'blur(5px)', "ctx.filter == 'blur(5px)'");
+ctx.filter = 'initial';
+_assert(ctx.filter == 'blur(5px)', "ctx.filter == 'blur(5px)'");
+ctx.filter = 'unset';
+_assert(ctx.filter == 'blur(5px)', "ctx.filter == 'blur(5px)'");
+
+ctx.filter = '';
+_assert(ctx.filter == 'blur(5px)', "ctx.filter == 'blur(5px)'");
+ctx.filter = null;
+_assert(ctx.filter == 'blur(5px)', "ctx.filter == 'blur(5px)'");
+ctx.filter = undefined;
+_assert(ctx.filter == 'blur(5px)', "ctx.filter == 'blur(5px)'");
+
+ctx.filter = 'blur( 5px)';
+assert_equals(ctx.filter, 'blur( 5px)');
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.value.worker.js b/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.value.worker.js
new file mode 100644
index 0000000000..01403f398c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.value.worker.js
@@ -0,0 +1,52 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.filter.value
+// Description:test if ctx.filter works correctly
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("test if ctx.filter works correctly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assert(ctx.filter == 'none', "ctx.filter == 'none'");
+ctx.filter = 'blur(5px)';
+_assert(ctx.filter == 'blur(5px)', "ctx.filter == 'blur(5px)'");
+ctx.save();
+ctx.filter = 'none';
+_assert(ctx.filter == 'none', "ctx.filter == 'none'");
+ctx.restore();
+_assert(ctx.filter == 'blur(5px)', "ctx.filter == 'blur(5px)'");
+
+ctx.filter = 'blur(10)';
+_assert(ctx.filter == 'blur(5px)', "ctx.filter == 'blur(5px)'");
+ctx.filter = 'blur 10px';
+_assert(ctx.filter == 'blur(5px)', "ctx.filter == 'blur(5px)'");
+
+ctx.filter = 'inherit';
+_assert(ctx.filter == 'blur(5px)', "ctx.filter == 'blur(5px)'");
+ctx.filter = 'initial';
+_assert(ctx.filter == 'blur(5px)', "ctx.filter == 'blur(5px)'");
+ctx.filter = 'unset';
+_assert(ctx.filter == 'blur(5px)', "ctx.filter == 'blur(5px)'");
+
+ctx.filter = '';
+_assert(ctx.filter == 'blur(5px)', "ctx.filter == 'blur(5px)'");
+ctx.filter = null;
+_assert(ctx.filter == 'blur(5px)', "ctx.filter == 'blur(5px)'");
+ctx.filter = undefined;
+_assert(ctx.filter == 'blur(5px)', "ctx.filter == 'blur(5px)'");
+
+ctx.filter = 'blur( 5px)';
+assert_equals(ctx.filter, 'blur( 5px)');
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.cap.butt.html b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.cap.butt.html
new file mode 100644
index 0000000000..7f34def564
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.cap.butt.html
@@ -0,0 +1,56 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.line.cap.butt</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.line.cap.butt</h1>
+<p class="desc">lineCap 'butt' is rendered correctly</p>
+
+
+<script>
+var t = async_test("lineCap 'butt' is rendered correctly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineCap = 'butt';
+ctx.lineWidth = 20;
+ctx.fillStyle = '#f00';
+ctx.strokeStyle = '#0f0';
+ctx.fillRect(15, 15, 20, 20);
+ctx.beginPath();
+ctx.moveTo(25, 15);
+ctx.lineTo(25, 35);
+ctx.stroke();
+ctx.fillStyle = '#0f0';
+ctx.strokeStyle = '#f00';
+ctx.beginPath();
+ctx.moveTo(75, 15);
+ctx.lineTo(75, 35);
+ctx.stroke();
+ctx.fillRect(65, 15, 20, 20);
+_assertPixel(canvas, 25,14, 0,255,0,255);
+_assertPixel(canvas, 25,15, 0,255,0,255);
+_assertPixel(canvas, 25,16, 0,255,0,255);
+_assertPixel(canvas, 25,34, 0,255,0,255);
+_assertPixel(canvas, 25,35, 0,255,0,255);
+_assertPixel(canvas, 25,36, 0,255,0,255);
+_assertPixel(canvas, 75,14, 0,255,0,255);
+_assertPixel(canvas, 75,15, 0,255,0,255);
+_assertPixel(canvas, 75,16, 0,255,0,255);
+_assertPixel(canvas, 75,34, 0,255,0,255);
+_assertPixel(canvas, 75,35, 0,255,0,255);
+_assertPixel(canvas, 75,36, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.cap.butt.worker.js b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.cap.butt.worker.js
new file mode 100644
index 0000000000..3eacba11a3
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.cap.butt.worker.js
@@ -0,0 +1,52 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.line.cap.butt
+// Description:lineCap 'butt' is rendered correctly
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("lineCap 'butt' is rendered correctly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineCap = 'butt';
+ctx.lineWidth = 20;
+ctx.fillStyle = '#f00';
+ctx.strokeStyle = '#0f0';
+ctx.fillRect(15, 15, 20, 20);
+ctx.beginPath();
+ctx.moveTo(25, 15);
+ctx.lineTo(25, 35);
+ctx.stroke();
+ctx.fillStyle = '#0f0';
+ctx.strokeStyle = '#f00';
+ctx.beginPath();
+ctx.moveTo(75, 15);
+ctx.lineTo(75, 35);
+ctx.stroke();
+ctx.fillRect(65, 15, 20, 20);
+_assertPixel(canvas, 25,14, 0,255,0,255);
+_assertPixel(canvas, 25,15, 0,255,0,255);
+_assertPixel(canvas, 25,16, 0,255,0,255);
+_assertPixel(canvas, 25,34, 0,255,0,255);
+_assertPixel(canvas, 25,35, 0,255,0,255);
+_assertPixel(canvas, 25,36, 0,255,0,255);
+_assertPixel(canvas, 75,14, 0,255,0,255);
+_assertPixel(canvas, 75,15, 0,255,0,255);
+_assertPixel(canvas, 75,16, 0,255,0,255);
+_assertPixel(canvas, 75,34, 0,255,0,255);
+_assertPixel(canvas, 75,35, 0,255,0,255);
+_assertPixel(canvas, 75,36, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.cap.closed.html b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.cap.closed.html
new file mode 100644
index 0000000000..0a3f3fcab7
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.cap.closed.html
@@ -0,0 +1,43 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.line.cap.closed</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.line.cap.closed</h1>
+<p class="desc">Line caps are not drawn at the corners of an unclosed rectangle</p>
+
+
+<script>
+var t = async_test("Line caps are not drawn at the corners of an unclosed rectangle");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.strokeStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineJoin = 'bevel';
+ctx.lineCap = 'square';
+ctx.lineWidth = 400;
+ctx.beginPath();
+ctx.moveTo(200, 200);
+ctx.lineTo(200, 1000);
+ctx.lineTo(1000, 1000);
+ctx.lineTo(1000, 200);
+ctx.closePath();
+ctx.stroke();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 48,1, 0,255,0,255);
+_assertPixel(canvas, 48,48, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.cap.closed.worker.js b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.cap.closed.worker.js
new file mode 100644
index 0000000000..24bace4c27
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.cap.closed.worker.js
@@ -0,0 +1,39 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.line.cap.closed
+// Description:Line caps are not drawn at the corners of an unclosed rectangle
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Line caps are not drawn at the corners of an unclosed rectangle");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.strokeStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineJoin = 'bevel';
+ctx.lineCap = 'square';
+ctx.lineWidth = 400;
+ctx.beginPath();
+ctx.moveTo(200, 200);
+ctx.lineTo(200, 1000);
+ctx.lineTo(1000, 1000);
+ctx.lineTo(1000, 200);
+ctx.closePath();
+ctx.stroke();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 48,1, 0,255,0,255);
+_assertPixel(canvas, 48,48, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.cap.invalid.html b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.cap.invalid.html
new file mode 100644
index 0000000000..f02cfcc758
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.cap.invalid.html
@@ -0,0 +1,46 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.line.cap.invalid</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.line.cap.invalid</h1>
+<p class="desc">Setting lineCap to invalid values is ignored</p>
+
+
+<script>
+var t = async_test("Setting lineCap to invalid values is ignored");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.lineCap = 'butt'
+_assertSame(ctx.lineCap, 'butt', "ctx.lineCap", "'butt'");
+ctx.lineCap = 'butt';
+ctx.lineCap = 'invalid';
+_assertSame(ctx.lineCap, 'butt', "ctx.lineCap", "'butt'");
+ctx.lineCap = 'butt';
+ctx.lineCap = 'ROUND';
+_assertSame(ctx.lineCap, 'butt', "ctx.lineCap", "'butt'");
+ctx.lineCap = 'butt';
+ctx.lineCap = 'round\0';
+_assertSame(ctx.lineCap, 'butt', "ctx.lineCap", "'butt'");
+ctx.lineCap = 'butt';
+ctx.lineCap = 'round ';
+_assertSame(ctx.lineCap, 'butt', "ctx.lineCap", "'butt'");
+ctx.lineCap = 'butt';
+ctx.lineCap = "";
+_assertSame(ctx.lineCap, 'butt', "ctx.lineCap", "'butt'");
+ctx.lineCap = 'butt';
+ctx.lineCap = 'bevel';
+_assertSame(ctx.lineCap, 'butt', "ctx.lineCap", "'butt'");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.cap.invalid.worker.js b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.cap.invalid.worker.js
new file mode 100644
index 0000000000..4ef69f35af
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.cap.invalid.worker.js
@@ -0,0 +1,42 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.line.cap.invalid
+// Description:Setting lineCap to invalid values is ignored
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Setting lineCap to invalid values is ignored");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.lineCap = 'butt'
+_assertSame(ctx.lineCap, 'butt', "ctx.lineCap", "'butt'");
+ctx.lineCap = 'butt';
+ctx.lineCap = 'invalid';
+_assertSame(ctx.lineCap, 'butt', "ctx.lineCap", "'butt'");
+ctx.lineCap = 'butt';
+ctx.lineCap = 'ROUND';
+_assertSame(ctx.lineCap, 'butt', "ctx.lineCap", "'butt'");
+ctx.lineCap = 'butt';
+ctx.lineCap = 'round\0';
+_assertSame(ctx.lineCap, 'butt', "ctx.lineCap", "'butt'");
+ctx.lineCap = 'butt';
+ctx.lineCap = 'round ';
+_assertSame(ctx.lineCap, 'butt', "ctx.lineCap", "'butt'");
+ctx.lineCap = 'butt';
+ctx.lineCap = "";
+_assertSame(ctx.lineCap, 'butt', "ctx.lineCap", "'butt'");
+ctx.lineCap = 'butt';
+ctx.lineCap = 'bevel';
+_assertSame(ctx.lineCap, 'butt', "ctx.lineCap", "'butt'");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.cap.open.html b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.cap.open.html
new file mode 100644
index 0000000000..00b72b62d2
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.cap.open.html
@@ -0,0 +1,43 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.line.cap.open</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.line.cap.open</h1>
+<p class="desc">Line caps are drawn at the corners of an unclosed rectangle</p>
+
+
+<script>
+var t = async_test("Line caps are drawn at the corners of an unclosed rectangle");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.strokeStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineJoin = 'bevel';
+ctx.lineCap = 'square';
+ctx.lineWidth = 400;
+ctx.beginPath();
+ctx.moveTo(200, 200);
+ctx.lineTo(200, 1000);
+ctx.lineTo(1000, 1000);
+ctx.lineTo(1000, 200);
+ctx.lineTo(200, 200);
+ctx.stroke();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 48,1, 0,255,0,255);
+_assertPixel(canvas, 48,48, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.cap.open.worker.js b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.cap.open.worker.js
new file mode 100644
index 0000000000..621de99a83
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.cap.open.worker.js
@@ -0,0 +1,39 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.line.cap.open
+// Description:Line caps are drawn at the corners of an unclosed rectangle
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Line caps are drawn at the corners of an unclosed rectangle");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.strokeStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineJoin = 'bevel';
+ctx.lineCap = 'square';
+ctx.lineWidth = 400;
+ctx.beginPath();
+ctx.moveTo(200, 200);
+ctx.lineTo(200, 1000);
+ctx.lineTo(1000, 1000);
+ctx.lineTo(1000, 200);
+ctx.lineTo(200, 200);
+ctx.stroke();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 48,1, 0,255,0,255);
+_assertPixel(canvas, 48,48, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.cap.round.html b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.cap.round.html
new file mode 100644
index 0000000000..9f6c66567e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.cap.round.html
@@ -0,0 +1,65 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.line.cap.round</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.line.cap.round</h1>
+<p class="desc">lineCap 'round' is rendered correctly</p>
+
+
+<script>
+var t = async_test("lineCap 'round' is rendered correctly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+var tol = 1; // tolerance to avoid antialiasing artifacts
+ctx.lineCap = 'round';
+ctx.lineWidth = 20;
+ctx.fillStyle = '#f00';
+ctx.strokeStyle = '#0f0';
+ctx.beginPath();
+ctx.moveTo(35-tol, 15);
+ctx.arc(25, 15, 10-tol, 0, Math.PI, true);
+ctx.arc(25, 35, 10-tol, Math.PI, 0, true);
+ctx.fill();
+ctx.beginPath();
+ctx.moveTo(25, 15);
+ctx.lineTo(25, 35);
+ctx.stroke();
+ctx.fillStyle = '#0f0';
+ctx.strokeStyle = '#f00';
+ctx.beginPath();
+ctx.moveTo(75, 15);
+ctx.lineTo(75, 35);
+ctx.stroke();
+ctx.beginPath();
+ctx.moveTo(85+tol, 15);
+ctx.arc(75, 15, 10+tol, 0, Math.PI, true);
+ctx.arc(75, 35, 10+tol, Math.PI, 0, true);
+ctx.fill();
+_assertPixel(canvas, 17,6, 0,255,0,255);
+_assertPixel(canvas, 25,6, 0,255,0,255);
+_assertPixel(canvas, 32,6, 0,255,0,255);
+_assertPixel(canvas, 17,43, 0,255,0,255);
+_assertPixel(canvas, 25,43, 0,255,0,255);
+_assertPixel(canvas, 32,43, 0,255,0,255);
+_assertPixel(canvas, 67,6, 0,255,0,255);
+_assertPixel(canvas, 75,6, 0,255,0,255);
+_assertPixel(canvas, 82,6, 0,255,0,255);
+_assertPixel(canvas, 67,43, 0,255,0,255);
+_assertPixel(canvas, 75,43, 0,255,0,255);
+_assertPixel(canvas, 82,43, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.cap.round.worker.js b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.cap.round.worker.js
new file mode 100644
index 0000000000..e744d2906f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.cap.round.worker.js
@@ -0,0 +1,61 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.line.cap.round
+// Description:lineCap 'round' is rendered correctly
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("lineCap 'round' is rendered correctly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+var tol = 1; // tolerance to avoid antialiasing artifacts
+ctx.lineCap = 'round';
+ctx.lineWidth = 20;
+ctx.fillStyle = '#f00';
+ctx.strokeStyle = '#0f0';
+ctx.beginPath();
+ctx.moveTo(35-tol, 15);
+ctx.arc(25, 15, 10-tol, 0, Math.PI, true);
+ctx.arc(25, 35, 10-tol, Math.PI, 0, true);
+ctx.fill();
+ctx.beginPath();
+ctx.moveTo(25, 15);
+ctx.lineTo(25, 35);
+ctx.stroke();
+ctx.fillStyle = '#0f0';
+ctx.strokeStyle = '#f00';
+ctx.beginPath();
+ctx.moveTo(75, 15);
+ctx.lineTo(75, 35);
+ctx.stroke();
+ctx.beginPath();
+ctx.moveTo(85+tol, 15);
+ctx.arc(75, 15, 10+tol, 0, Math.PI, true);
+ctx.arc(75, 35, 10+tol, Math.PI, 0, true);
+ctx.fill();
+_assertPixel(canvas, 17,6, 0,255,0,255);
+_assertPixel(canvas, 25,6, 0,255,0,255);
+_assertPixel(canvas, 32,6, 0,255,0,255);
+_assertPixel(canvas, 17,43, 0,255,0,255);
+_assertPixel(canvas, 25,43, 0,255,0,255);
+_assertPixel(canvas, 32,43, 0,255,0,255);
+_assertPixel(canvas, 67,6, 0,255,0,255);
+_assertPixel(canvas, 75,6, 0,255,0,255);
+_assertPixel(canvas, 82,6, 0,255,0,255);
+_assertPixel(canvas, 67,43, 0,255,0,255);
+_assertPixel(canvas, 75,43, 0,255,0,255);
+_assertPixel(canvas, 82,43, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.cap.square.html b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.cap.square.html
new file mode 100644
index 0000000000..0fd4b2c71a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.cap.square.html
@@ -0,0 +1,56 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.line.cap.square</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.line.cap.square</h1>
+<p class="desc">lineCap 'square' is rendered correctly</p>
+
+
+<script>
+var t = async_test("lineCap 'square' is rendered correctly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineCap = 'square';
+ctx.lineWidth = 20;
+ctx.fillStyle = '#f00';
+ctx.strokeStyle = '#0f0';
+ctx.fillRect(15, 5, 20, 40);
+ctx.beginPath();
+ctx.moveTo(25, 15);
+ctx.lineTo(25, 35);
+ctx.stroke();
+ctx.fillStyle = '#0f0';
+ctx.strokeStyle = '#f00';
+ctx.beginPath();
+ctx.moveTo(75, 15);
+ctx.lineTo(75, 35);
+ctx.stroke();
+ctx.fillRect(65, 5, 20, 40);
+_assertPixel(canvas, 25,4, 0,255,0,255);
+_assertPixel(canvas, 25,5, 0,255,0,255);
+_assertPixel(canvas, 25,6, 0,255,0,255);
+_assertPixel(canvas, 25,44, 0,255,0,255);
+_assertPixel(canvas, 25,45, 0,255,0,255);
+_assertPixel(canvas, 25,46, 0,255,0,255);
+_assertPixel(canvas, 75,4, 0,255,0,255);
+_assertPixel(canvas, 75,5, 0,255,0,255);
+_assertPixel(canvas, 75,6, 0,255,0,255);
+_assertPixel(canvas, 75,44, 0,255,0,255);
+_assertPixel(canvas, 75,45, 0,255,0,255);
+_assertPixel(canvas, 75,46, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.cap.square.worker.js b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.cap.square.worker.js
new file mode 100644
index 0000000000..7684bbbc85
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.cap.square.worker.js
@@ -0,0 +1,52 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.line.cap.square
+// Description:lineCap 'square' is rendered correctly
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("lineCap 'square' is rendered correctly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineCap = 'square';
+ctx.lineWidth = 20;
+ctx.fillStyle = '#f00';
+ctx.strokeStyle = '#0f0';
+ctx.fillRect(15, 5, 20, 40);
+ctx.beginPath();
+ctx.moveTo(25, 15);
+ctx.lineTo(25, 35);
+ctx.stroke();
+ctx.fillStyle = '#0f0';
+ctx.strokeStyle = '#f00';
+ctx.beginPath();
+ctx.moveTo(75, 15);
+ctx.lineTo(75, 35);
+ctx.stroke();
+ctx.fillRect(65, 5, 20, 40);
+_assertPixel(canvas, 25,4, 0,255,0,255);
+_assertPixel(canvas, 25,5, 0,255,0,255);
+_assertPixel(canvas, 25,6, 0,255,0,255);
+_assertPixel(canvas, 25,44, 0,255,0,255);
+_assertPixel(canvas, 25,45, 0,255,0,255);
+_assertPixel(canvas, 25,46, 0,255,0,255);
+_assertPixel(canvas, 75,4, 0,255,0,255);
+_assertPixel(canvas, 75,5, 0,255,0,255);
+_assertPixel(canvas, 75,6, 0,255,0,255);
+_assertPixel(canvas, 75,44, 0,255,0,255);
+_assertPixel(canvas, 75,45, 0,255,0,255);
+_assertPixel(canvas, 75,46, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.cap.valid.html b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.cap.valid.html
new file mode 100644
index 0000000000..ce7b4c8ad6
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.cap.valid.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.line.cap.valid</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.line.cap.valid</h1>
+<p class="desc">Setting lineCap to valid values works</p>
+
+
+<script>
+var t = async_test("Setting lineCap to valid values works");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.lineCap = 'butt'
+_assertSame(ctx.lineCap, 'butt', "ctx.lineCap", "'butt'");
+ctx.lineCap = 'round';
+_assertSame(ctx.lineCap, 'round', "ctx.lineCap", "'round'");
+ctx.lineCap = 'square';
+_assertSame(ctx.lineCap, 'square', "ctx.lineCap", "'square'");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.cap.valid.worker.js b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.cap.valid.worker.js
new file mode 100644
index 0000000000..7fa84f4d6f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.cap.valid.worker.js
@@ -0,0 +1,28 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.line.cap.valid
+// Description:Setting lineCap to valid values works
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Setting lineCap to valid values works");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.lineCap = 'butt'
+_assertSame(ctx.lineCap, 'butt', "ctx.lineCap", "'butt'");
+ctx.lineCap = 'round';
+_assertSame(ctx.lineCap, 'round', "ctx.lineCap", "'round'");
+ctx.lineCap = 'square';
+_assertSame(ctx.lineCap, 'square', "ctx.lineCap", "'square'");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.cross.html b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.cross.html
new file mode 100644
index 0000000000..09d3a00b31
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.cross.html
@@ -0,0 +1,40 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.line.cross</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.line.cross</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 200;
+ctx.lineJoin = 'bevel';
+ctx.strokeStyle = '#f00';
+ctx.beginPath();
+ctx.moveTo(110, 50);
+ctx.lineTo(110, 60);
+ctx.lineTo(100, 60);
+ctx.stroke();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 48,1, 0,255,0,255);
+_assertPixel(canvas, 48,48, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.cross.worker.js b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.cross.worker.js
new file mode 100644
index 0000000000..82b289bdea
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.cross.worker.js
@@ -0,0 +1,36 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.line.cross
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 200;
+ctx.lineJoin = 'bevel';
+ctx.strokeStyle = '#f00';
+ctx.beginPath();
+ctx.moveTo(110, 50);
+ctx.lineTo(110, 60);
+ctx.lineTo(100, 60);
+ctx.stroke();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 48,1, 0,255,0,255);
+_assertPixel(canvas, 48,48, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.defaults.html b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.defaults.html
new file mode 100644
index 0000000000..64c21c563e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.defaults.html
@@ -0,0 +1,30 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.line.defaults</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.line.defaults</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertSame(ctx.lineWidth, 1, "ctx.lineWidth", "1");
+_assertSame(ctx.lineCap, 'butt', "ctx.lineCap", "'butt'");
+_assertSame(ctx.lineJoin, 'miter', "ctx.lineJoin", "'miter'");
+_assertSame(ctx.miterLimit, 10, "ctx.miterLimit", "10");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.defaults.worker.js b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.defaults.worker.js
new file mode 100644
index 0000000000..77116b4454
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.defaults.worker.js
@@ -0,0 +1,26 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.line.defaults
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertSame(ctx.lineWidth, 1, "ctx.lineWidth", "1");
+_assertSame(ctx.lineCap, 'butt', "ctx.lineCap", "'butt'");
+_assertSame(ctx.lineJoin, 'miter', "ctx.lineJoin", "'miter'");
+_assertSame(ctx.miterLimit, 10, "ctx.miterLimit", "10");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.join.bevel.html b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.join.bevel.html
new file mode 100644
index 0000000000..45c8d3eb54
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.join.bevel.html
@@ -0,0 +1,69 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.line.join.bevel</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.line.join.bevel</h1>
+<p class="desc">lineJoin 'bevel' is rendered correctly</p>
+
+
+<script>
+var t = async_test("lineJoin 'bevel' is rendered correctly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+var tol = 1; // tolerance to avoid antialiasing artifacts
+ctx.lineJoin = 'bevel';
+ctx.lineWidth = 20;
+ctx.fillStyle = '#f00';
+ctx.strokeStyle = '#0f0';
+ctx.fillRect(10, 10, 20, 20);
+ctx.fillRect(20, 20, 20, 20);
+ctx.beginPath();
+ctx.moveTo(30, 20);
+ctx.lineTo(40-tol, 20);
+ctx.lineTo(30, 10+tol);
+ctx.fill();
+ctx.beginPath();
+ctx.moveTo(10, 20);
+ctx.lineTo(30, 20);
+ctx.lineTo(30, 40);
+ctx.stroke();
+ctx.fillStyle = '#0f0';
+ctx.strokeStyle = '#f00';
+ctx.beginPath();
+ctx.moveTo(60, 20);
+ctx.lineTo(80, 20);
+ctx.lineTo(80, 40);
+ctx.stroke();
+ctx.fillRect(60, 10, 20, 20);
+ctx.fillRect(70, 20, 20, 20);
+ctx.beginPath();
+ctx.moveTo(80, 20);
+ctx.lineTo(90+tol, 20);
+ctx.lineTo(80, 10-tol);
+ctx.fill();
+_assertPixel(canvas, 34,16, 0,255,0,255);
+_assertPixel(canvas, 34,15, 0,255,0,255);
+_assertPixel(canvas, 35,15, 0,255,0,255);
+_assertPixel(canvas, 36,15, 0,255,0,255);
+_assertPixel(canvas, 36,14, 0,255,0,255);
+_assertPixel(canvas, 84,16, 0,255,0,255);
+_assertPixel(canvas, 84,15, 0,255,0,255);
+_assertPixel(canvas, 85,15, 0,255,0,255);
+_assertPixel(canvas, 86,15, 0,255,0,255);
+_assertPixel(canvas, 86,14, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.join.bevel.worker.js b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.join.bevel.worker.js
new file mode 100644
index 0000000000..2dfbf34f15
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.join.bevel.worker.js
@@ -0,0 +1,65 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.line.join.bevel
+// Description:lineJoin 'bevel' is rendered correctly
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("lineJoin 'bevel' is rendered correctly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+var tol = 1; // tolerance to avoid antialiasing artifacts
+ctx.lineJoin = 'bevel';
+ctx.lineWidth = 20;
+ctx.fillStyle = '#f00';
+ctx.strokeStyle = '#0f0';
+ctx.fillRect(10, 10, 20, 20);
+ctx.fillRect(20, 20, 20, 20);
+ctx.beginPath();
+ctx.moveTo(30, 20);
+ctx.lineTo(40-tol, 20);
+ctx.lineTo(30, 10+tol);
+ctx.fill();
+ctx.beginPath();
+ctx.moveTo(10, 20);
+ctx.lineTo(30, 20);
+ctx.lineTo(30, 40);
+ctx.stroke();
+ctx.fillStyle = '#0f0';
+ctx.strokeStyle = '#f00';
+ctx.beginPath();
+ctx.moveTo(60, 20);
+ctx.lineTo(80, 20);
+ctx.lineTo(80, 40);
+ctx.stroke();
+ctx.fillRect(60, 10, 20, 20);
+ctx.fillRect(70, 20, 20, 20);
+ctx.beginPath();
+ctx.moveTo(80, 20);
+ctx.lineTo(90+tol, 20);
+ctx.lineTo(80, 10-tol);
+ctx.fill();
+_assertPixel(canvas, 34,16, 0,255,0,255);
+_assertPixel(canvas, 34,15, 0,255,0,255);
+_assertPixel(canvas, 35,15, 0,255,0,255);
+_assertPixel(canvas, 36,15, 0,255,0,255);
+_assertPixel(canvas, 36,14, 0,255,0,255);
+_assertPixel(canvas, 84,16, 0,255,0,255);
+_assertPixel(canvas, 84,15, 0,255,0,255);
+_assertPixel(canvas, 85,15, 0,255,0,255);
+_assertPixel(canvas, 86,15, 0,255,0,255);
+_assertPixel(canvas, 86,14, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.join.closed.html b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.join.closed.html
new file mode 100644
index 0000000000..5e88ad0d01
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.join.closed.html
@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.line.join.closed</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.line.join.closed</h1>
+<p class="desc">Line joins are drawn at the corner of a closed rectangle</p>
+
+
+<script>
+var t = async_test("Line joins are drawn at the corner of a closed rectangle");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.strokeStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineJoin = 'miter';
+ctx.lineWidth = 200;
+ctx.beginPath();
+ctx.moveTo(100, 50);
+ctx.lineTo(100, 1000);
+ctx.lineTo(1000, 1000);
+ctx.lineTo(1000, 50);
+ctx.closePath();
+ctx.stroke();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 48,1, 0,255,0,255);
+_assertPixel(canvas, 48,48, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.join.closed.worker.js b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.join.closed.worker.js
new file mode 100644
index 0000000000..f2b029ecaf
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.join.closed.worker.js
@@ -0,0 +1,38 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.line.join.closed
+// Description:Line joins are drawn at the corner of a closed rectangle
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Line joins are drawn at the corner of a closed rectangle");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.strokeStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineJoin = 'miter';
+ctx.lineWidth = 200;
+ctx.beginPath();
+ctx.moveTo(100, 50);
+ctx.lineTo(100, 1000);
+ctx.lineTo(1000, 1000);
+ctx.lineTo(1000, 50);
+ctx.closePath();
+ctx.stroke();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 48,1, 0,255,0,255);
+_assertPixel(canvas, 48,48, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.join.invalid.html b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.join.invalid.html
new file mode 100644
index 0000000000..a54861205e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.join.invalid.html
@@ -0,0 +1,46 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.line.join.invalid</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.line.join.invalid</h1>
+<p class="desc">Setting lineJoin to invalid values is ignored</p>
+
+
+<script>
+var t = async_test("Setting lineJoin to invalid values is ignored");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.lineJoin = 'bevel'
+_assertSame(ctx.lineJoin, 'bevel', "ctx.lineJoin", "'bevel'");
+ctx.lineJoin = 'bevel';
+ctx.lineJoin = 'invalid';
+_assertSame(ctx.lineJoin, 'bevel', "ctx.lineJoin", "'bevel'");
+ctx.lineJoin = 'bevel';
+ctx.lineJoin = 'ROUND';
+_assertSame(ctx.lineJoin, 'bevel', "ctx.lineJoin", "'bevel'");
+ctx.lineJoin = 'bevel';
+ctx.lineJoin = 'round\0';
+_assertSame(ctx.lineJoin, 'bevel', "ctx.lineJoin", "'bevel'");
+ctx.lineJoin = 'bevel';
+ctx.lineJoin = 'round ';
+_assertSame(ctx.lineJoin, 'bevel', "ctx.lineJoin", "'bevel'");
+ctx.lineJoin = 'bevel';
+ctx.lineJoin = "";
+_assertSame(ctx.lineJoin, 'bevel', "ctx.lineJoin", "'bevel'");
+ctx.lineJoin = 'bevel';
+ctx.lineJoin = 'butt';
+_assertSame(ctx.lineJoin, 'bevel', "ctx.lineJoin", "'bevel'");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.join.invalid.worker.js b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.join.invalid.worker.js
new file mode 100644
index 0000000000..23dfe67230
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.join.invalid.worker.js
@@ -0,0 +1,42 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.line.join.invalid
+// Description:Setting lineJoin to invalid values is ignored
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Setting lineJoin to invalid values is ignored");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.lineJoin = 'bevel'
+_assertSame(ctx.lineJoin, 'bevel', "ctx.lineJoin", "'bevel'");
+ctx.lineJoin = 'bevel';
+ctx.lineJoin = 'invalid';
+_assertSame(ctx.lineJoin, 'bevel', "ctx.lineJoin", "'bevel'");
+ctx.lineJoin = 'bevel';
+ctx.lineJoin = 'ROUND';
+_assertSame(ctx.lineJoin, 'bevel', "ctx.lineJoin", "'bevel'");
+ctx.lineJoin = 'bevel';
+ctx.lineJoin = 'round\0';
+_assertSame(ctx.lineJoin, 'bevel', "ctx.lineJoin", "'bevel'");
+ctx.lineJoin = 'bevel';
+ctx.lineJoin = 'round ';
+_assertSame(ctx.lineJoin, 'bevel', "ctx.lineJoin", "'bevel'");
+ctx.lineJoin = 'bevel';
+ctx.lineJoin = "";
+_assertSame(ctx.lineJoin, 'bevel', "ctx.lineJoin", "'bevel'");
+ctx.lineJoin = 'bevel';
+ctx.lineJoin = 'butt';
+_assertSame(ctx.lineJoin, 'bevel', "ctx.lineJoin", "'bevel'");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.join.miter.html b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.join.miter.html
new file mode 100644
index 0000000000..64918eca38
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.join.miter.html
@@ -0,0 +1,60 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.line.join.miter</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.line.join.miter</h1>
+<p class="desc">lineJoin 'miter' is rendered correctly</p>
+
+
+<script>
+var t = async_test("lineJoin 'miter' is rendered correctly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineJoin = 'miter';
+ctx.lineWidth = 20;
+ctx.fillStyle = '#f00';
+ctx.strokeStyle = '#0f0';
+ctx.fillStyle = '#f00';
+ctx.strokeStyle = '#0f0';
+ctx.fillRect(10, 10, 30, 20);
+ctx.fillRect(20, 10, 20, 30);
+ctx.beginPath();
+ctx.moveTo(10, 20);
+ctx.lineTo(30, 20);
+ctx.lineTo(30, 40);
+ctx.stroke();
+ctx.fillStyle = '#0f0';
+ctx.strokeStyle = '#f00';
+ctx.beginPath();
+ctx.moveTo(60, 20);
+ctx.lineTo(80, 20);
+ctx.lineTo(80, 40);
+ctx.stroke();
+ctx.fillRect(60, 10, 30, 20);
+ctx.fillRect(70, 10, 20, 30);
+_assertPixel(canvas, 38,12, 0,255,0,255);
+_assertPixel(canvas, 39,11, 0,255,0,255);
+_assertPixel(canvas, 40,10, 0,255,0,255);
+_assertPixel(canvas, 41,9, 0,255,0,255);
+_assertPixel(canvas, 42,8, 0,255,0,255);
+_assertPixel(canvas, 88,12, 0,255,0,255);
+_assertPixel(canvas, 89,11, 0,255,0,255);
+_assertPixel(canvas, 90,10, 0,255,0,255);
+_assertPixel(canvas, 91,9, 0,255,0,255);
+_assertPixel(canvas, 92,8, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.join.miter.worker.js b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.join.miter.worker.js
new file mode 100644
index 0000000000..02712a806e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.join.miter.worker.js
@@ -0,0 +1,56 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.line.join.miter
+// Description:lineJoin 'miter' is rendered correctly
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("lineJoin 'miter' is rendered correctly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineJoin = 'miter';
+ctx.lineWidth = 20;
+ctx.fillStyle = '#f00';
+ctx.strokeStyle = '#0f0';
+ctx.fillStyle = '#f00';
+ctx.strokeStyle = '#0f0';
+ctx.fillRect(10, 10, 30, 20);
+ctx.fillRect(20, 10, 20, 30);
+ctx.beginPath();
+ctx.moveTo(10, 20);
+ctx.lineTo(30, 20);
+ctx.lineTo(30, 40);
+ctx.stroke();
+ctx.fillStyle = '#0f0';
+ctx.strokeStyle = '#f00';
+ctx.beginPath();
+ctx.moveTo(60, 20);
+ctx.lineTo(80, 20);
+ctx.lineTo(80, 40);
+ctx.stroke();
+ctx.fillRect(60, 10, 30, 20);
+ctx.fillRect(70, 10, 20, 30);
+_assertPixel(canvas, 38,12, 0,255,0,255);
+_assertPixel(canvas, 39,11, 0,255,0,255);
+_assertPixel(canvas, 40,10, 0,255,0,255);
+_assertPixel(canvas, 41,9, 0,255,0,255);
+_assertPixel(canvas, 42,8, 0,255,0,255);
+_assertPixel(canvas, 88,12, 0,255,0,255);
+_assertPixel(canvas, 89,11, 0,255,0,255);
+_assertPixel(canvas, 90,10, 0,255,0,255);
+_assertPixel(canvas, 91,9, 0,255,0,255);
+_assertPixel(canvas, 92,8, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.join.open.html b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.join.open.html
new file mode 100644
index 0000000000..48154df59b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.join.open.html
@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.line.join.open</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.line.join.open</h1>
+<p class="desc">Line joins are not drawn at the corner of an unclosed rectangle</p>
+
+
+<script>
+var t = async_test("Line joins are not drawn at the corner of an unclosed rectangle");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.strokeStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineJoin = 'miter';
+ctx.lineWidth = 200;
+ctx.beginPath();
+ctx.moveTo(100, 50);
+ctx.lineTo(100, 1000);
+ctx.lineTo(1000, 1000);
+ctx.lineTo(1000, 50);
+ctx.lineTo(100, 50);
+ctx.stroke();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 48,1, 0,255,0,255);
+_assertPixel(canvas, 48,48, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.join.open.worker.js b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.join.open.worker.js
new file mode 100644
index 0000000000..133854bf54
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.join.open.worker.js
@@ -0,0 +1,38 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.line.join.open
+// Description:Line joins are not drawn at the corner of an unclosed rectangle
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Line joins are not drawn at the corner of an unclosed rectangle");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.strokeStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineJoin = 'miter';
+ctx.lineWidth = 200;
+ctx.beginPath();
+ctx.moveTo(100, 50);
+ctx.lineTo(100, 1000);
+ctx.lineTo(1000, 1000);
+ctx.lineTo(1000, 50);
+ctx.lineTo(100, 50);
+ctx.stroke();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 48,1, 0,255,0,255);
+_assertPixel(canvas, 48,48, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.join.parallel.html b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.join.parallel.html
new file mode 100644
index 0000000000..fdda123dd8
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.join.parallel.html
@@ -0,0 +1,40 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.line.join.parallel</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.line.join.parallel</h1>
+<p class="desc">Line joins are drawn at 180-degree joins</p>
+
+
+<script>
+var t = async_test("Line joins are drawn at 180-degree joins");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 300;
+ctx.lineJoin = 'round';
+ctx.beginPath();
+ctx.moveTo(-100, 25);
+ctx.lineTo(0, 25);
+ctx.lineTo(-100, 25);
+ctx.stroke();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 48,1, 0,255,0,255);
+_assertPixel(canvas, 48,48, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.join.parallel.worker.js b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.join.parallel.worker.js
new file mode 100644
index 0000000000..68ed957b6d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.join.parallel.worker.js
@@ -0,0 +1,36 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.line.join.parallel
+// Description:Line joins are drawn at 180-degree joins
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Line joins are drawn at 180-degree joins");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 300;
+ctx.lineJoin = 'round';
+ctx.beginPath();
+ctx.moveTo(-100, 25);
+ctx.lineTo(0, 25);
+ctx.lineTo(-100, 25);
+ctx.stroke();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 48,1, 0,255,0,255);
+_assertPixel(canvas, 48,48, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.join.round.html b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.join.round.html
new file mode 100644
index 0000000000..ebc71c30f8
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.join.round.html
@@ -0,0 +1,67 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.line.join.round</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.line.join.round</h1>
+<p class="desc">lineJoin 'round' is rendered correctly</p>
+
+
+<script>
+var t = async_test("lineJoin 'round' is rendered correctly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+var tol = 1; // tolerance to avoid antialiasing artifacts
+ctx.lineJoin = 'round';
+ctx.lineWidth = 20;
+ctx.fillStyle = '#f00';
+ctx.strokeStyle = '#0f0';
+ctx.fillRect(10, 10, 20, 20);
+ctx.fillRect(20, 20, 20, 20);
+ctx.beginPath();
+ctx.moveTo(30, 20);
+ctx.arc(30, 20, 10-tol, 0, 2*Math.PI, true);
+ctx.fill();
+ctx.beginPath();
+ctx.moveTo(10, 20);
+ctx.lineTo(30, 20);
+ctx.lineTo(30, 40);
+ctx.stroke();
+ctx.fillStyle = '#0f0';
+ctx.strokeStyle = '#f00';
+ctx.beginPath();
+ctx.moveTo(60, 20);
+ctx.lineTo(80, 20);
+ctx.lineTo(80, 40);
+ctx.stroke();
+ctx.fillRect(60, 10, 20, 20);
+ctx.fillRect(70, 20, 20, 20);
+ctx.beginPath();
+ctx.moveTo(80, 20);
+ctx.arc(80, 20, 10+tol, 0, 2*Math.PI, true);
+ctx.fill();
+_assertPixel(canvas, 36,14, 0,255,0,255);
+_assertPixel(canvas, 36,13, 0,255,0,255);
+_assertPixel(canvas, 37,13, 0,255,0,255);
+_assertPixel(canvas, 38,13, 0,255,0,255);
+_assertPixel(canvas, 38,12, 0,255,0,255);
+_assertPixel(canvas, 86,14, 0,255,0,255);
+_assertPixel(canvas, 86,13, 0,255,0,255);
+_assertPixel(canvas, 87,13, 0,255,0,255);
+_assertPixel(canvas, 88,13, 0,255,0,255);
+_assertPixel(canvas, 88,12, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.join.round.worker.js b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.join.round.worker.js
new file mode 100644
index 0000000000..c7da3520b3
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.join.round.worker.js
@@ -0,0 +1,63 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.line.join.round
+// Description:lineJoin 'round' is rendered correctly
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("lineJoin 'round' is rendered correctly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+var tol = 1; // tolerance to avoid antialiasing artifacts
+ctx.lineJoin = 'round';
+ctx.lineWidth = 20;
+ctx.fillStyle = '#f00';
+ctx.strokeStyle = '#0f0';
+ctx.fillRect(10, 10, 20, 20);
+ctx.fillRect(20, 20, 20, 20);
+ctx.beginPath();
+ctx.moveTo(30, 20);
+ctx.arc(30, 20, 10-tol, 0, 2*Math.PI, true);
+ctx.fill();
+ctx.beginPath();
+ctx.moveTo(10, 20);
+ctx.lineTo(30, 20);
+ctx.lineTo(30, 40);
+ctx.stroke();
+ctx.fillStyle = '#0f0';
+ctx.strokeStyle = '#f00';
+ctx.beginPath();
+ctx.moveTo(60, 20);
+ctx.lineTo(80, 20);
+ctx.lineTo(80, 40);
+ctx.stroke();
+ctx.fillRect(60, 10, 20, 20);
+ctx.fillRect(70, 20, 20, 20);
+ctx.beginPath();
+ctx.moveTo(80, 20);
+ctx.arc(80, 20, 10+tol, 0, 2*Math.PI, true);
+ctx.fill();
+_assertPixel(canvas, 36,14, 0,255,0,255);
+_assertPixel(canvas, 36,13, 0,255,0,255);
+_assertPixel(canvas, 37,13, 0,255,0,255);
+_assertPixel(canvas, 38,13, 0,255,0,255);
+_assertPixel(canvas, 38,12, 0,255,0,255);
+_assertPixel(canvas, 86,14, 0,255,0,255);
+_assertPixel(canvas, 86,13, 0,255,0,255);
+_assertPixel(canvas, 87,13, 0,255,0,255);
+_assertPixel(canvas, 88,13, 0,255,0,255);
+_assertPixel(canvas, 88,12, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.join.valid.html b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.join.valid.html
new file mode 100644
index 0000000000..eaa7c24967
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.join.valid.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.line.join.valid</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.line.join.valid</h1>
+<p class="desc">Setting lineJoin to valid values works</p>
+
+
+<script>
+var t = async_test("Setting lineJoin to valid values works");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.lineJoin = 'bevel'
+_assertSame(ctx.lineJoin, 'bevel', "ctx.lineJoin", "'bevel'");
+ctx.lineJoin = 'round';
+_assertSame(ctx.lineJoin, 'round', "ctx.lineJoin", "'round'");
+ctx.lineJoin = 'miter';
+_assertSame(ctx.lineJoin, 'miter', "ctx.lineJoin", "'miter'");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.join.valid.worker.js b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.join.valid.worker.js
new file mode 100644
index 0000000000..4e7154358a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.join.valid.worker.js
@@ -0,0 +1,28 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.line.join.valid
+// Description:Setting lineJoin to valid values works
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Setting lineJoin to valid values works");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.lineJoin = 'bevel'
+_assertSame(ctx.lineJoin, 'bevel', "ctx.lineJoin", "'bevel'");
+ctx.lineJoin = 'round';
+_assertSame(ctx.lineJoin, 'round', "ctx.lineJoin", "'round'");
+ctx.lineJoin = 'miter';
+_assertSame(ctx.lineJoin, 'miter', "ctx.lineJoin", "'miter'");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.miter.acute.html b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.miter.acute.html
new file mode 100644
index 0000000000..fd6902ca4d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.miter.acute.html
@@ -0,0 +1,48 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.line.miter.acute</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.line.miter.acute</h1>
+<p class="desc">Miter joins are drawn correctly with acute angles</p>
+
+
+<script>
+var t = async_test("Miter joins are drawn correctly with acute angles");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 200;
+ctx.lineJoin = 'miter';
+ctx.strokeStyle = '#0f0';
+ctx.miterLimit = 2.614;
+ctx.beginPath();
+ctx.moveTo(100, 1000);
+ctx.lineTo(100, 100);
+ctx.lineTo(1000, 1000);
+ctx.stroke();
+ctx.strokeStyle = '#f00';
+ctx.miterLimit = 2.613;
+ctx.beginPath();
+ctx.moveTo(100, 1000);
+ctx.lineTo(100, 100);
+ctx.lineTo(1000, 1000);
+ctx.stroke();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 48,1, 0,255,0,255);
+_assertPixel(canvas, 48,48, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.miter.acute.worker.js b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.miter.acute.worker.js
new file mode 100644
index 0000000000..ef2954a7fe
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.miter.acute.worker.js
@@ -0,0 +1,44 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.line.miter.acute
+// Description:Miter joins are drawn correctly with acute angles
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Miter joins are drawn correctly with acute angles");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 200;
+ctx.lineJoin = 'miter';
+ctx.strokeStyle = '#0f0';
+ctx.miterLimit = 2.614;
+ctx.beginPath();
+ctx.moveTo(100, 1000);
+ctx.lineTo(100, 100);
+ctx.lineTo(1000, 1000);
+ctx.stroke();
+ctx.strokeStyle = '#f00';
+ctx.miterLimit = 2.613;
+ctx.beginPath();
+ctx.moveTo(100, 1000);
+ctx.lineTo(100, 100);
+ctx.lineTo(1000, 1000);
+ctx.stroke();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 48,1, 0,255,0,255);
+_assertPixel(canvas, 48,48, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.miter.exceeded.html b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.miter.exceeded.html
new file mode 100644
index 0000000000..fd0e7a1ca2
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.miter.exceeded.html
@@ -0,0 +1,41 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.line.miter.exceeded</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.line.miter.exceeded</h1>
+<p class="desc">Miter joins are not drawn when the miter limit is exceeded</p>
+
+
+<script>
+var t = async_test("Miter joins are not drawn when the miter limit is exceeded");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 400;
+ctx.lineJoin = 'miter';
+ctx.strokeStyle = '#f00';
+ctx.miterLimit = 1.414;
+ctx.beginPath();
+ctx.moveTo(200, 1000);
+ctx.lineTo(200, 200);
+ctx.lineTo(1000, 201); // slightly non-right-angle to avoid being a special case
+ctx.stroke();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 48,1, 0,255,0,255);
+_assertPixel(canvas, 48,48, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.miter.exceeded.worker.js b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.miter.exceeded.worker.js
new file mode 100644
index 0000000000..2e0fbd4910
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.miter.exceeded.worker.js
@@ -0,0 +1,37 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.line.miter.exceeded
+// Description:Miter joins are not drawn when the miter limit is exceeded
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Miter joins are not drawn when the miter limit is exceeded");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 400;
+ctx.lineJoin = 'miter';
+ctx.strokeStyle = '#f00';
+ctx.miterLimit = 1.414;
+ctx.beginPath();
+ctx.moveTo(200, 1000);
+ctx.lineTo(200, 200);
+ctx.lineTo(1000, 201); // slightly non-right-angle to avoid being a special case
+ctx.stroke();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 48,1, 0,255,0,255);
+_assertPixel(canvas, 48,48, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.miter.invalid.html b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.miter.invalid.html
new file mode 100644
index 0000000000..35bda1a11a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.miter.invalid.html
@@ -0,0 +1,43 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.line.miter.invalid</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.line.miter.invalid</h1>
+<p class="desc">Setting miterLimit to invalid values is ignored</p>
+
+
+<script>
+var t = async_test("Setting miterLimit to invalid values is ignored");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.miterLimit = 1.5;
+_assertSame(ctx.miterLimit, 1.5, "ctx.miterLimit", "1.5");
+ctx.miterLimit = 1.5;
+ctx.miterLimit = 0;
+_assertSame(ctx.miterLimit, 1.5, "ctx.miterLimit", "1.5");
+ctx.miterLimit = 1.5;
+ctx.miterLimit = -1;
+_assertSame(ctx.miterLimit, 1.5, "ctx.miterLimit", "1.5");
+ctx.miterLimit = 1.5;
+ctx.miterLimit = Infinity;
+_assertSame(ctx.miterLimit, 1.5, "ctx.miterLimit", "1.5");
+ctx.miterLimit = 1.5;
+ctx.miterLimit = -Infinity;
+_assertSame(ctx.miterLimit, 1.5, "ctx.miterLimit", "1.5");
+ctx.miterLimit = 1.5;
+ctx.miterLimit = NaN;
+_assertSame(ctx.miterLimit, 1.5, "ctx.miterLimit", "1.5");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.miter.invalid.worker.js b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.miter.invalid.worker.js
new file mode 100644
index 0000000000..ef4c17eea2
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.miter.invalid.worker.js
@@ -0,0 +1,39 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.line.miter.invalid
+// Description:Setting miterLimit to invalid values is ignored
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Setting miterLimit to invalid values is ignored");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.miterLimit = 1.5;
+_assertSame(ctx.miterLimit, 1.5, "ctx.miterLimit", "1.5");
+ctx.miterLimit = 1.5;
+ctx.miterLimit = 0;
+_assertSame(ctx.miterLimit, 1.5, "ctx.miterLimit", "1.5");
+ctx.miterLimit = 1.5;
+ctx.miterLimit = -1;
+_assertSame(ctx.miterLimit, 1.5, "ctx.miterLimit", "1.5");
+ctx.miterLimit = 1.5;
+ctx.miterLimit = Infinity;
+_assertSame(ctx.miterLimit, 1.5, "ctx.miterLimit", "1.5");
+ctx.miterLimit = 1.5;
+ctx.miterLimit = -Infinity;
+_assertSame(ctx.miterLimit, 1.5, "ctx.miterLimit", "1.5");
+ctx.miterLimit = 1.5;
+ctx.miterLimit = NaN;
+_assertSame(ctx.miterLimit, 1.5, "ctx.miterLimit", "1.5");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.miter.lineedge.html b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.miter.lineedge.html
new file mode 100644
index 0000000000..292ed560de
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.miter.lineedge.html
@@ -0,0 +1,38 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.line.miter.lineedge</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.line.miter.lineedge</h1>
+<p class="desc">Miter joins are not drawn when the miter limit is exceeded at the corners of a zero-height rectangle</p>
+
+
+<script>
+var t = async_test("Miter joins are not drawn when the miter limit is exceeded at the corners of a zero-height rectangle");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 200;
+ctx.lineJoin = 'miter';
+ctx.strokeStyle = '#f00';
+ctx.miterLimit = 1.414;
+ctx.beginPath();
+ctx.strokeRect(100, 25, 200, 0);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 48,1, 0,255,0,255);
+_assertPixel(canvas, 48,48, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.miter.lineedge.worker.js b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.miter.lineedge.worker.js
new file mode 100644
index 0000000000..c7fa1e6d17
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.miter.lineedge.worker.js
@@ -0,0 +1,34 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.line.miter.lineedge
+// Description:Miter joins are not drawn when the miter limit is exceeded at the corners of a zero-height rectangle
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Miter joins are not drawn when the miter limit is exceeded at the corners of a zero-height rectangle");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 200;
+ctx.lineJoin = 'miter';
+ctx.strokeStyle = '#f00';
+ctx.miterLimit = 1.414;
+ctx.beginPath();
+ctx.strokeRect(100, 25, 200, 0);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 48,1, 0,255,0,255);
+_assertPixel(canvas, 48,48, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.miter.obtuse.html b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.miter.obtuse.html
new file mode 100644
index 0000000000..4e60253ddc
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.miter.obtuse.html
@@ -0,0 +1,48 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.line.miter.obtuse</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.line.miter.obtuse</h1>
+<p class="desc">Miter joins are drawn correctly with obtuse angles</p>
+
+
+<script>
+var t = async_test("Miter joins are drawn correctly with obtuse angles");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 1600;
+ctx.lineJoin = 'miter';
+ctx.strokeStyle = '#0f0';
+ctx.miterLimit = 1.083;
+ctx.beginPath();
+ctx.moveTo(800, 10000);
+ctx.lineTo(800, 300);
+ctx.lineTo(10000, -8900);
+ctx.stroke();
+ctx.strokeStyle = '#f00';
+ctx.miterLimit = 1.082;
+ctx.beginPath();
+ctx.moveTo(800, 10000);
+ctx.lineTo(800, 300);
+ctx.lineTo(10000, -8900);
+ctx.stroke();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 48,1, 0,255,0,255);
+_assertPixel(canvas, 48,48, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.miter.obtuse.worker.js b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.miter.obtuse.worker.js
new file mode 100644
index 0000000000..3cf78ed21e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.miter.obtuse.worker.js
@@ -0,0 +1,44 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.line.miter.obtuse
+// Description:Miter joins are drawn correctly with obtuse angles
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Miter joins are drawn correctly with obtuse angles");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 1600;
+ctx.lineJoin = 'miter';
+ctx.strokeStyle = '#0f0';
+ctx.miterLimit = 1.083;
+ctx.beginPath();
+ctx.moveTo(800, 10000);
+ctx.lineTo(800, 300);
+ctx.lineTo(10000, -8900);
+ctx.stroke();
+ctx.strokeStyle = '#f00';
+ctx.miterLimit = 1.082;
+ctx.beginPath();
+ctx.moveTo(800, 10000);
+ctx.lineTo(800, 300);
+ctx.lineTo(10000, -8900);
+ctx.stroke();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 48,1, 0,255,0,255);
+_assertPixel(canvas, 48,48, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.miter.rightangle.html b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.miter.rightangle.html
new file mode 100644
index 0000000000..33cbe5d02c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.miter.rightangle.html
@@ -0,0 +1,41 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.line.miter.rightangle</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.line.miter.rightangle</h1>
+<p class="desc">Miter joins are not drawn when the miter limit is exceeded, on exact right angles</p>
+
+
+<script>
+var t = async_test("Miter joins are not drawn when the miter limit is exceeded, on exact right angles");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 400;
+ctx.lineJoin = 'miter';
+ctx.strokeStyle = '#f00';
+ctx.miterLimit = 1.414;
+ctx.beginPath();
+ctx.moveTo(200, 1000);
+ctx.lineTo(200, 200);
+ctx.lineTo(1000, 200);
+ctx.stroke();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 48,1, 0,255,0,255);
+_assertPixel(canvas, 48,48, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.miter.rightangle.worker.js b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.miter.rightangle.worker.js
new file mode 100644
index 0000000000..895318c3ef
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.miter.rightangle.worker.js
@@ -0,0 +1,37 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.line.miter.rightangle
+// Description:Miter joins are not drawn when the miter limit is exceeded, on exact right angles
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Miter joins are not drawn when the miter limit is exceeded, on exact right angles");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 400;
+ctx.lineJoin = 'miter';
+ctx.strokeStyle = '#f00';
+ctx.miterLimit = 1.414;
+ctx.beginPath();
+ctx.moveTo(200, 1000);
+ctx.lineTo(200, 200);
+ctx.lineTo(1000, 200);
+ctx.stroke();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 48,1, 0,255,0,255);
+_assertPixel(canvas, 48,48, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.miter.valid.html b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.miter.valid.html
new file mode 100644
index 0000000000..1d034052aa
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.miter.valid.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.line.miter.valid</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.line.miter.valid</h1>
+<p class="desc">Setting miterLimit to valid values works</p>
+
+
+<script>
+var t = async_test("Setting miterLimit to valid values works");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.miterLimit = 1.5;
+_assertSame(ctx.miterLimit, 1.5, "ctx.miterLimit", "1.5");
+ctx.miterLimit = "1e1";
+_assertSame(ctx.miterLimit, 10, "ctx.miterLimit", "10");
+ctx.miterLimit = 1/1024;
+_assertSame(ctx.miterLimit, 1/1024, "ctx.miterLimit", "1/1024");
+ctx.miterLimit = 1000;
+_assertSame(ctx.miterLimit, 1000, "ctx.miterLimit", "1000");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.miter.valid.worker.js b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.miter.valid.worker.js
new file mode 100644
index 0000000000..b34561407e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.miter.valid.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.line.miter.valid
+// Description:Setting miterLimit to valid values works
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Setting miterLimit to valid values works");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.miterLimit = 1.5;
+_assertSame(ctx.miterLimit, 1.5, "ctx.miterLimit", "1.5");
+ctx.miterLimit = "1e1";
+_assertSame(ctx.miterLimit, 10, "ctx.miterLimit", "10");
+ctx.miterLimit = 1/1024;
+_assertSame(ctx.miterLimit, 1/1024, "ctx.miterLimit", "1/1024");
+ctx.miterLimit = 1000;
+_assertSame(ctx.miterLimit, 1000, "ctx.miterLimit", "1000");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.miter.within.html b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.miter.within.html
new file mode 100644
index 0000000000..4af7c84a6a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.miter.within.html
@@ -0,0 +1,41 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.line.miter.within</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.line.miter.within</h1>
+<p class="desc">Miter joins are drawn when the miter limit is not quite exceeded</p>
+
+
+<script>
+var t = async_test("Miter joins are drawn when the miter limit is not quite exceeded");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 400;
+ctx.lineJoin = 'miter';
+ctx.strokeStyle = '#0f0';
+ctx.miterLimit = 1.416;
+ctx.beginPath();
+ctx.moveTo(200, 1000);
+ctx.lineTo(200, 200);
+ctx.lineTo(1000, 201);
+ctx.stroke();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 48,1, 0,255,0,255);
+_assertPixel(canvas, 48,48, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.miter.within.worker.js b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.miter.within.worker.js
new file mode 100644
index 0000000000..64fe4312c2
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.miter.within.worker.js
@@ -0,0 +1,37 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.line.miter.within
+// Description:Miter joins are drawn when the miter limit is not quite exceeded
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Miter joins are drawn when the miter limit is not quite exceeded");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 400;
+ctx.lineJoin = 'miter';
+ctx.strokeStyle = '#0f0';
+ctx.miterLimit = 1.416;
+ctx.beginPath();
+ctx.moveTo(200, 1000);
+ctx.lineTo(200, 200);
+ctx.lineTo(1000, 201);
+ctx.stroke();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 48,1, 0,255,0,255);
+_assertPixel(canvas, 48,48, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.union.html b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.union.html
new file mode 100644
index 0000000000..60defee7cb
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.union.html
@@ -0,0 +1,43 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.line.union</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.line.union</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 100;
+ctx.lineCap = 'round';
+ctx.strokeStyle = '#0f0';
+ctx.beginPath();
+ctx.moveTo(0, 24);
+ctx.lineTo(100, 25);
+ctx.lineTo(0, 26);
+ctx.closePath();
+ctx.stroke();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 25,1, 0,255,0,255);
+_assertPixel(canvas, 48,1, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 25,1, 0,255,0,255);
+_assertPixel(canvas, 48,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.union.worker.js b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.union.worker.js
new file mode 100644
index 0000000000..ed26237337
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.union.worker.js
@@ -0,0 +1,39 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.line.union
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 100;
+ctx.lineCap = 'round';
+ctx.strokeStyle = '#0f0';
+ctx.beginPath();
+ctx.moveTo(0, 24);
+ctx.lineTo(100, 25);
+ctx.lineTo(0, 26);
+ctx.closePath();
+ctx.stroke();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 25,1, 0,255,0,255);
+_assertPixel(canvas, 48,1, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 25,1, 0,255,0,255);
+_assertPixel(canvas, 48,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.width.basic.html b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.width.basic.html
new file mode 100644
index 0000000000..9b81b1c386
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.width.basic.html
@@ -0,0 +1,59 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.line.width.basic</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.line.width.basic</h1>
+<p class="desc">lineWidth determines the width of line strokes</p>
+
+
+<script>
+var t = async_test("lineWidth determines the width of line strokes");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 20;
+// Draw a green line over a red box, to check the line is not too small
+ctx.fillStyle = '#f00';
+ctx.strokeStyle = '#0f0';
+ctx.fillRect(15, 15, 20, 20);
+ctx.beginPath();
+ctx.moveTo(25, 15);
+ctx.lineTo(25, 35);
+ctx.stroke();
+// Draw a green box over a red line, to check the line is not too large
+ctx.fillStyle = '#0f0';
+ctx.strokeStyle = '#f00';
+ctx.beginPath();
+ctx.moveTo(75, 15);
+ctx.lineTo(75, 35);
+ctx.stroke();
+ctx.fillRect(65, 15, 20, 20);
+_assertPixel(canvas, 14,25, 0,255,0,255);
+_assertPixel(canvas, 15,25, 0,255,0,255);
+_assertPixel(canvas, 16,25, 0,255,0,255);
+_assertPixel(canvas, 25,25, 0,255,0,255);
+_assertPixel(canvas, 34,25, 0,255,0,255);
+_assertPixel(canvas, 35,25, 0,255,0,255);
+_assertPixel(canvas, 36,25, 0,255,0,255);
+_assertPixel(canvas, 64,25, 0,255,0,255);
+_assertPixel(canvas, 65,25, 0,255,0,255);
+_assertPixel(canvas, 66,25, 0,255,0,255);
+_assertPixel(canvas, 75,25, 0,255,0,255);
+_assertPixel(canvas, 84,25, 0,255,0,255);
+_assertPixel(canvas, 85,25, 0,255,0,255);
+_assertPixel(canvas, 86,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.width.basic.worker.js b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.width.basic.worker.js
new file mode 100644
index 0000000000..e822679c63
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.width.basic.worker.js
@@ -0,0 +1,55 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.line.width.basic
+// Description:lineWidth determines the width of line strokes
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("lineWidth determines the width of line strokes");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 20;
+// Draw a green line over a red box, to check the line is not too small
+ctx.fillStyle = '#f00';
+ctx.strokeStyle = '#0f0';
+ctx.fillRect(15, 15, 20, 20);
+ctx.beginPath();
+ctx.moveTo(25, 15);
+ctx.lineTo(25, 35);
+ctx.stroke();
+// Draw a green box over a red line, to check the line is not too large
+ctx.fillStyle = '#0f0';
+ctx.strokeStyle = '#f00';
+ctx.beginPath();
+ctx.moveTo(75, 15);
+ctx.lineTo(75, 35);
+ctx.stroke();
+ctx.fillRect(65, 15, 20, 20);
+_assertPixel(canvas, 14,25, 0,255,0,255);
+_assertPixel(canvas, 15,25, 0,255,0,255);
+_assertPixel(canvas, 16,25, 0,255,0,255);
+_assertPixel(canvas, 25,25, 0,255,0,255);
+_assertPixel(canvas, 34,25, 0,255,0,255);
+_assertPixel(canvas, 35,25, 0,255,0,255);
+_assertPixel(canvas, 36,25, 0,255,0,255);
+_assertPixel(canvas, 64,25, 0,255,0,255);
+_assertPixel(canvas, 65,25, 0,255,0,255);
+_assertPixel(canvas, 66,25, 0,255,0,255);
+_assertPixel(canvas, 75,25, 0,255,0,255);
+_assertPixel(canvas, 84,25, 0,255,0,255);
+_assertPixel(canvas, 85,25, 0,255,0,255);
+_assertPixel(canvas, 86,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.width.invalid.html b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.width.invalid.html
new file mode 100644
index 0000000000..439af5ecf2
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.width.invalid.html
@@ -0,0 +1,43 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.line.width.invalid</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.line.width.invalid</h1>
+<p class="desc">Setting lineWidth to invalid values is ignored</p>
+
+
+<script>
+var t = async_test("Setting lineWidth to invalid values is ignored");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.lineWidth = 1.5;
+_assertSame(ctx.lineWidth, 1.5, "ctx.lineWidth", "1.5");
+ctx.lineWidth = 1.5;
+ctx.lineWidth = 0;
+_assertSame(ctx.lineWidth, 1.5, "ctx.lineWidth", "1.5");
+ctx.lineWidth = 1.5;
+ctx.lineWidth = -1;
+_assertSame(ctx.lineWidth, 1.5, "ctx.lineWidth", "1.5");
+ctx.lineWidth = 1.5;
+ctx.lineWidth = Infinity;
+_assertSame(ctx.lineWidth, 1.5, "ctx.lineWidth", "1.5");
+ctx.lineWidth = 1.5;
+ctx.lineWidth = -Infinity;
+_assertSame(ctx.lineWidth, 1.5, "ctx.lineWidth", "1.5");
+ctx.lineWidth = 1.5;
+ctx.lineWidth = NaN;
+_assertSame(ctx.lineWidth, 1.5, "ctx.lineWidth", "1.5");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.width.invalid.worker.js b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.width.invalid.worker.js
new file mode 100644
index 0000000000..d87b87e901
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.width.invalid.worker.js
@@ -0,0 +1,39 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.line.width.invalid
+// Description:Setting lineWidth to invalid values is ignored
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Setting lineWidth to invalid values is ignored");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.lineWidth = 1.5;
+_assertSame(ctx.lineWidth, 1.5, "ctx.lineWidth", "1.5");
+ctx.lineWidth = 1.5;
+ctx.lineWidth = 0;
+_assertSame(ctx.lineWidth, 1.5, "ctx.lineWidth", "1.5");
+ctx.lineWidth = 1.5;
+ctx.lineWidth = -1;
+_assertSame(ctx.lineWidth, 1.5, "ctx.lineWidth", "1.5");
+ctx.lineWidth = 1.5;
+ctx.lineWidth = Infinity;
+_assertSame(ctx.lineWidth, 1.5, "ctx.lineWidth", "1.5");
+ctx.lineWidth = 1.5;
+ctx.lineWidth = -Infinity;
+_assertSame(ctx.lineWidth, 1.5, "ctx.lineWidth", "1.5");
+ctx.lineWidth = 1.5;
+ctx.lineWidth = NaN;
+_assertSame(ctx.lineWidth, 1.5, "ctx.lineWidth", "1.5");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.width.scaledefault.html b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.width.scaledefault.html
new file mode 100644
index 0000000000..7813997858
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.width.scaledefault.html
@@ -0,0 +1,38 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.line.width.scaledefault</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.line.width.scaledefault</h1>
+<p class="desc">Default lineWidth strokes are affected by scale transformations</p>
+
+
+<script>
+var t = async_test("Default lineWidth strokes are affected by scale transformations");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.scale(50, 50);
+ctx.strokeStyle = '#0f0';
+ctx.moveTo(0, 0.5);
+ctx.lineTo(2, 0.5);
+ctx.stroke();
+_assertPixel(canvas, 25,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 75,25, 0,255,0,255);
+_assertPixel(canvas, 50,5, 0,255,0,255);
+_assertPixel(canvas, 50,45, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.width.scaledefault.worker.js b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.width.scaledefault.worker.js
new file mode 100644
index 0000000000..f9506c4acc
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.width.scaledefault.worker.js
@@ -0,0 +1,34 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.line.width.scaledefault
+// Description:Default lineWidth strokes are affected by scale transformations
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Default lineWidth strokes are affected by scale transformations");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.scale(50, 50);
+ctx.strokeStyle = '#0f0';
+ctx.moveTo(0, 0.5);
+ctx.lineTo(2, 0.5);
+ctx.stroke();
+_assertPixel(canvas, 25,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 75,25, 0,255,0,255);
+_assertPixel(canvas, 50,5, 0,255,0,255);
+_assertPixel(canvas, 50,45, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.width.transformed.html b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.width.transformed.html
new file mode 100644
index 0000000000..e75cccd991
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.width.transformed.html
@@ -0,0 +1,65 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.line.width.transformed</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.line.width.transformed</h1>
+<p class="desc">Line stroke widths are affected by scale transformations</p>
+
+
+<script>
+var t = async_test("Line stroke widths are affected by scale transformations");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 4;
+// Draw a green line over a red box, to check the line is not too small
+ctx.fillStyle = '#f00';
+ctx.strokeStyle = '#0f0';
+ctx.fillRect(15, 15, 20, 20);
+ctx.save();
+ ctx.scale(5, 1);
+ ctx.beginPath();
+ ctx.moveTo(5, 15);
+ ctx.lineTo(5, 35);
+ ctx.stroke();
+ctx.restore();
+// Draw a green box over a red line, to check the line is not too large
+ctx.fillStyle = '#0f0';
+ctx.strokeStyle = '#f00';
+ctx.save();
+ ctx.scale(-5, 1);
+ ctx.beginPath();
+ ctx.moveTo(-15, 15);
+ ctx.lineTo(-15, 35);
+ ctx.stroke();
+ctx.restore();
+ctx.fillRect(65, 15, 20, 20);
+_assertPixel(canvas, 14,25, 0,255,0,255);
+_assertPixel(canvas, 15,25, 0,255,0,255);
+_assertPixel(canvas, 16,25, 0,255,0,255);
+_assertPixel(canvas, 25,25, 0,255,0,255);
+_assertPixel(canvas, 34,25, 0,255,0,255);
+_assertPixel(canvas, 35,25, 0,255,0,255);
+_assertPixel(canvas, 36,25, 0,255,0,255);
+_assertPixel(canvas, 64,25, 0,255,0,255);
+_assertPixel(canvas, 65,25, 0,255,0,255);
+_assertPixel(canvas, 66,25, 0,255,0,255);
+_assertPixel(canvas, 75,25, 0,255,0,255);
+_assertPixel(canvas, 84,25, 0,255,0,255);
+_assertPixel(canvas, 85,25, 0,255,0,255);
+_assertPixel(canvas, 86,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.width.transformed.worker.js b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.width.transformed.worker.js
new file mode 100644
index 0000000000..f377d03ca7
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.width.transformed.worker.js
@@ -0,0 +1,61 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.line.width.transformed
+// Description:Line stroke widths are affected by scale transformations
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Line stroke widths are affected by scale transformations");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 4;
+// Draw a green line over a red box, to check the line is not too small
+ctx.fillStyle = '#f00';
+ctx.strokeStyle = '#0f0';
+ctx.fillRect(15, 15, 20, 20);
+ctx.save();
+ ctx.scale(5, 1);
+ ctx.beginPath();
+ ctx.moveTo(5, 15);
+ ctx.lineTo(5, 35);
+ ctx.stroke();
+ctx.restore();
+// Draw a green box over a red line, to check the line is not too large
+ctx.fillStyle = '#0f0';
+ctx.strokeStyle = '#f00';
+ctx.save();
+ ctx.scale(-5, 1);
+ ctx.beginPath();
+ ctx.moveTo(-15, 15);
+ ctx.lineTo(-15, 35);
+ ctx.stroke();
+ctx.restore();
+ctx.fillRect(65, 15, 20, 20);
+_assertPixel(canvas, 14,25, 0,255,0,255);
+_assertPixel(canvas, 15,25, 0,255,0,255);
+_assertPixel(canvas, 16,25, 0,255,0,255);
+_assertPixel(canvas, 25,25, 0,255,0,255);
+_assertPixel(canvas, 34,25, 0,255,0,255);
+_assertPixel(canvas, 35,25, 0,255,0,255);
+_assertPixel(canvas, 36,25, 0,255,0,255);
+_assertPixel(canvas, 64,25, 0,255,0,255);
+_assertPixel(canvas, 65,25, 0,255,0,255);
+_assertPixel(canvas, 66,25, 0,255,0,255);
+_assertPixel(canvas, 75,25, 0,255,0,255);
+_assertPixel(canvas, 84,25, 0,255,0,255);
+_assertPixel(canvas, 85,25, 0,255,0,255);
+_assertPixel(canvas, 86,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.width.valid.html b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.width.valid.html
new file mode 100644
index 0000000000..adaabccc11
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.width.valid.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.line.width.valid</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.line.width.valid</h1>
+<p class="desc">Setting lineWidth to valid values works</p>
+
+
+<script>
+var t = async_test("Setting lineWidth to valid values works");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.lineWidth = 1.5;
+_assertSame(ctx.lineWidth, 1.5, "ctx.lineWidth", "1.5");
+ctx.lineWidth = "1e1";
+_assertSame(ctx.lineWidth, 10, "ctx.lineWidth", "10");
+ctx.lineWidth = 1/1024;
+_assertSame(ctx.lineWidth, 1/1024, "ctx.lineWidth", "1/1024");
+ctx.lineWidth = 1000;
+_assertSame(ctx.lineWidth, 1000, "ctx.lineWidth", "1000");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.width.valid.worker.js b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.width.valid.worker.js
new file mode 100644
index 0000000000..f409e1fa8b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.width.valid.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.line.width.valid
+// Description:Setting lineWidth to valid values works
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Setting lineWidth to valid values works");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.lineWidth = 1.5;
+_assertSame(ctx.lineWidth, 1.5, "ctx.lineWidth", "1.5");
+ctx.lineWidth = "1e1";
+_assertSame(ctx.lineWidth, 10, "ctx.lineWidth", "10");
+ctx.lineWidth = 1/1024;
+_assertSame(ctx.lineWidth, 1/1024, "ctx.lineWidth", "1/1024");
+ctx.lineWidth = 1000;
+_assertSame(ctx.lineWidth, 1000, "ctx.lineWidth", "1000");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/manual/convert-to-blob/offscreencanvas.convert.to.blob.html b/testing/web-platform/tests/html/canvas/offscreen/manual/convert-to-blob/offscreencanvas.convert.to.blob.html
new file mode 100644
index 0000000000..1cc0e5bffd
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/manual/convert-to-blob/offscreencanvas.convert.to.blob.html
@@ -0,0 +1,165 @@
+<!DOCTYPE html>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+<link rel="help" href="https://html.spec.whatwg.org/#dom-offscreencanvas-converttoblob">
+<script id="myWorker" type="text/worker">
+self.onmessage = function(e) {
+};
+</script>
+<script>
+function makeWorker(script)
+{
+ var blob = new Blob([script]);
+ return new Worker(URL.createObjectURL(blob));
+}
+
+function drawCanvas(ctx)
+{
+ ctx.fillStyle = "red";
+ ctx.fillRect(0, 0, 5, 5);
+ ctx.fillStyle = "green";
+ ctx.fillRect(5, 0, 5, 5);
+ ctx.fillStyle = "blue";
+ ctx.fillRect(0, 5, 5, 5);
+ ctx.fillStyle = "black";
+ ctx.fillRect(5, 5, 5, 5);
+}
+
+function compareImages(image1, image2)
+{
+ var canvas1 = document.createElement('canvas');
+ var canvas2 = document.createElement('canvas');
+ canvas1.width = canvas1.height = 10;
+ canvas2.width = canvas2.height = 10;
+ var ctx1 = canvas1.getContext('2d');
+ var ctx2 = canvas1.getContext('2d');
+ ctx1.drawImage(image1, 0, 0);
+ ctx2.drawImage(image2, 0, 0);
+ var data1 = ctx1.getImageData(0, 0, 10, 10).data;
+ var data2 = ctx2.getImageData(0, 0, 10, 10).data;
+ assert_equals(data1.length, data2.length);
+ var imageMatched = true;
+ for (var i = 0; i < data1.length; i++) {
+ if (data1[i] != data2[i]) {
+ imageMatched = false;
+ break;
+ }
+ }
+ assert_true(imageMatched);
+}
+
+function testConvertToBlob(t, typeVal, qualityVal) {
+ var offscreenCanvas = new OffscreenCanvas(10, 10);
+ var oCtx = offscreenCanvas.getContext('2d');
+ drawCanvas(oCtx);
+ var canvas = document.createElement('canvas');
+ var ctx = canvas.getContext('2d');
+ drawCanvas(ctx);
+ var imageLoadedCounter = 0;
+
+ var image1 = new Image();
+ var image2 = new Image();
+ var promise;
+ if (typeVal == "empty" && qualityVal == "empty")
+ promise = offscreenCanvas.convertToBlob();
+ else if (typeVal == "empty" && qualityVal != "empty")
+ promise = offscreenCanvas.convertToBlob({quality: qualityVal});
+ else if (typeVal != "empty" && qualityVal == "empty")
+ promise = offscreenCanvas.convertToBlob({type: typeVal});
+ else
+ promise = offscreenCanvas.convertToBlob({type: typeVal, quality: qualityVal});
+ promise.then(function(blob2) {
+ image2.src = URL.createObjectURL(blob2);
+ if (typeVal == "empty" && qualityVal == "empty") {
+ canvas.toBlob(function(blob1) {
+ image1.src = URL.createObjectURL(blob1);
+ });
+ } else if (typeVal == "empty" && qualityVal != "empty") {
+ canvas.toBlob(function(blob1) {
+ image1.src = URL.createObjectURL(blob1);
+ }, "image/png", qualityVal);
+ } else if (typeVal != "empty" && qualityVal == "empty") {
+ canvas.toBlob(function(blob1) {
+ image1.src = URL.createObjectURL(blob1);
+ }, typeVal, 1.0);
+ } else {
+ canvas.toBlob(function(blob1) {
+ image1.src = URL.createObjectURL(blob1);
+ }, typeVal, qualityVal);
+ }
+ image1.onload = image2.onload = t.step_func(function() {
+ imageLoadedCounter++;
+ if (imageLoadedCounter == 2) {
+ compareImages(image1, image2);
+ t.done();
+ }
+ });
+ });
+}
+
+async_test(function(t) {
+ testConvertToBlob(t, "empty", "empty");
+ testConvertToBlob(t, "empty", 1.0);
+ testConvertToBlob(t, "empty", 0.2);
+}, "Test that convertToBlob with default type produces correct result");
+
+async_test(function(t) {
+ testConvertToBlob(t, "image/png", "empty");
+ testConvertToBlob(t, "image/png", 1.0);
+ testConvertToBlob(t, "image/png", 0.2);
+}, "Test that convertToBlob with png produces correct result");
+
+async_test(function(t) {
+ testConvertToBlob(t, "image/jpeg", "empty");
+ testConvertToBlob(t, "image/jpeg", 1.0);
+ testConvertToBlob(t, "image/jpeg", 0.2);
+}, "Test that convertToBlob with jpge produces correct result");
+
+async_test(function(t) {
+ testConvertToBlob(t, "image/webp", "empty");
+ testConvertToBlob(t, "image/webp", 1.0);
+ testConvertToBlob(t, "image/webp", 0.2);
+}, "Test that convertToBlob with webp produces correct result");
+
+async_test(function(t) {
+ var worker = makeWorker(document.getElementById("myWorker").textContent);
+ var offscreenCanvas = new OffscreenCanvas(10, 10);
+ worker.postMessage({offscreenCanvas}, [offscreenCanvas]);
+ offscreenCanvas.convertToBlob().then(t.step_func_done(function() {
+ assert_false("convertToBlob didn't throw, but should be");
+ }), t.step_func_done(function(e) {
+ assert_true(e instanceof DOMException);
+ assert_equals(e.name, "InvalidStateError");
+ }));
+}, "Test that call convertToBlob on a detached OffscreenCanvas throws exception");
+
+async_test(function(t) {
+ var offscreenCanvas = new OffscreenCanvas(0, 0);
+ offscreenCanvas.convertToBlob().then(t.step_func_done(function() {
+ assert_false("convertToBlob didn't throw, but should be");
+ }), t.step_func_done(function(e) {
+ assert_true(e instanceof DOMException);
+ assert_equals(e.name, "IndexSizeError");
+ }));
+}, "Test that call convertToBlob on a OffscreenCanvas with size 0 throws exception");
+
+async_test(function(t) {
+ var img = new Image();
+ img.src = "/images/green.png";
+ img.crossOrigin = "anonymous";
+ img.onload = t.step_func_done(() => {
+ var offscreenCanvas = new OffscreenCanvas(10, 10);
+ var ctx = offscreenCanvas.getContext("2d");
+ ctx.drawImage(img, 0, 0);
+ offscreenCanvas.convertToBlob().then(t.step_func_done(function() {
+ assert_false("convertToBlob didn't throw, but should");
+ }), t.step_func_done(function(e) {
+ assert_true(e instanceof DOMException);
+ assert_equals(e.name, "SecurityError");
+ }));
+ });
+}, "Test that call convertToBlob on a OffscreenCanvas with tainted origin throws exception");
+
+</script>
+
diff --git a/testing/web-platform/tests/html/canvas/offscreen/manual/convert-to-blob/offscreencanvas.convert.to.blob.w.html b/testing/web-platform/tests/html/canvas/offscreen/manual/convert-to-blob/offscreencanvas.convert.to.blob.w.html
new file mode 100644
index 0000000000..5c1fa4cf40
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/manual/convert-to-blob/offscreencanvas.convert.to.blob.w.html
@@ -0,0 +1,337 @@
+<!DOCTYPE html>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+<link rel="help" href="https://html.spec.whatwg.org/#dom-offscreencanvas-converttoblob">
+<script id="myWorker" type="text/worker">
+function drawCanvas(ctx)
+{
+ ctx.fillStyle = "red";
+ ctx.fillRect(0, 0, 5, 5);
+ ctx.fillStyle = "green";
+ ctx.fillRect(5, 0, 5, 5);
+ ctx.fillStyle = "blue";
+ ctx.fillRect(0, 5, 5, 5);
+ ctx.fillStyle = "black";
+ ctx.fillRect(5, 5, 5, 5);
+}
+
+function testConvertToBlob(typeVal, qualityVal) {
+ var offscreenCanvas = new OffscreenCanvas(10, 10);
+ var oCtx = offscreenCanvas.getContext('2d');
+ drawCanvas(oCtx);
+
+ var promise;
+ if (typeVal == "empty" && qualityVal == "empty")
+ promise = offscreenCanvas.convertToBlob();
+ else if (typeVal == "empty" && qualityVal != "empty")
+ promise = offscreenCanvas.convertToBlob({quality: qualityVal});
+ else if (typeVal != "empty" && qualityVal == "empty")
+ promise = offscreenCanvas.convertToBlob({type: typeVal});
+ else
+ promise = offscreenCanvas.convertToBlob({type: typeVal, quality: qualityVal});
+ promise.then(function(blob) {
+ self.postMessage(blob);
+ });
+}
+
+function testConvertToBlobException1()
+{
+ var offscreenCanvas = new OffscreenCanvas(10, 10);
+ self.postMessage({offscreenCanvas}, [offscreenCanvas]);
+ offscreenCanvas.convertToBlob().then(function() {
+ self.postMessage(false);
+ }, function(e) {
+ self.postMessage(e instanceof DOMException && e.name == "InvalidStateError");
+ });
+}
+
+function testConvertToBlobException2()
+{
+ var offscreenCanvas = new OffscreenCanvas(0, 0);
+ offscreenCanvas.convertToBlob().then(function() {
+ self.postMessage(false);
+ }, function(e) {
+ self.postMessage(e instanceof DOMException && e.name == "IndexSizeError");
+ });
+}
+
+function testConvertToBlobException3(bitmap)
+{
+ var offscreenCanvas = new OffscreenCanvas(10, 10);
+ var ctx = offscreenCanvas.getContext("2d");
+ ctx.drawImage(bitmap, 0, 0);
+ offscreenCanvas.convertToBlob().then(function() {
+ self.postMessage(false);
+ }, function(e) {
+ self.postMessage(e instanceof DOMException && e.name == "SecurityError");
+ });
+}
+
+self.onmessage = function(e) {
+ if (e.data instanceof ImageBitmap) {
+ testConvertToBlobException3(e.data);
+ return;
+ }
+
+ switch(e.data) {
+ case 'test1':
+ testConvertToBlob("empty", "empty");
+ break;
+ case 'test2':
+ testConvertToBlob("empty", 1.0);
+ break;
+ case 'test3':
+ testConvertToBlob("empty", 0.2);
+ break;
+ case 'test4':
+ testConvertToBlob("image/png", "empty");
+ break;
+ case 'test5':
+ testConvertToBlob("image/png", 1.0);
+ break;
+ case 'test6':
+ testConvertToBlob("image/png", 0.2);
+ break;
+ case 'test7':
+ testConvertToBlob("image/jpeg", "empty");
+ break;
+ case 'test8':
+ testConvertToBlob("image/jpeg", 1.0);
+ break;
+ case 'test9':
+ testConvertToBlob("image/jpeg", 0.2);
+ break;
+ case 'test10':
+ testConvertToBlob("image/webp", "empty");
+ break;
+ case 'test11':
+ testConvertToBlob("image/webp", 1.0);
+ break;
+ case 'test12':
+ testConvertToBlob("image/webp", 0.2);
+ break;
+ case 'test13':
+ testConvertToBlobException1();
+ break;
+ case 'test14':
+ testConvertToBlobException2();
+ break;
+ }
+};
+
+</script>
+
+<script>
+function makeWorker(test) {
+ var blob = new Blob([document.getElementById("myWorker").textContent]);
+ var worker = new Worker(URL.createObjectURL(blob));
+ worker.onerror = test.unreached_func("error");
+ return worker;
+}
+
+function drawCanvas(ctx)
+{
+ ctx.fillStyle = "red";
+ ctx.fillRect(0, 0, 5, 5);
+ ctx.fillStyle = "green";
+ ctx.fillRect(5, 0, 5, 5);
+ ctx.fillStyle = "blue";
+ ctx.fillRect(0, 5, 5, 5);
+ ctx.fillStyle = "black";
+ ctx.fillRect(5, 5, 5, 5);
+}
+
+function compareImages(image1, image2)
+{
+ var canvas1 = document.createElement('canvas');
+ var canvas2 = document.createElement('canvas');
+ canvas1.width = canvas1.height = 10;
+ canvas2.width = canvas2.height = 10;
+ var ctx1 = canvas1.getContext('2d');
+ var ctx2 = canvas1.getContext('2d');
+ ctx1.drawImage(image1, 0, 0);
+ ctx2.drawImage(image2, 0, 0);
+ var data1 = ctx1.getImageData(0, 0, 10, 10).data;
+ var data2 = ctx2.getImageData(0, 0, 10, 10).data;
+ assert_equals(data1.length, data2.length);
+ var imageMatched = true;
+ for (var i = 0; i < data1.length; i++) {
+ if (data1[i] != data2[i]) {
+ imageMatched = false;
+ break;
+ }
+ }
+ assert_true(imageMatched);
+}
+
+function compareWithToBlob(t, typeVal, qualityVal, blob2)
+{
+ var image1 = new Image();
+ var image2 = new Image();
+ var canvas = document.createElement('canvas');
+ var ctx = canvas.getContext('2d');
+ drawCanvas(ctx);
+ var imageLoadedCounter = 0;
+
+ if (typeVal == "empty" && qualityVal == "empty") {
+ canvas.toBlob(function(blob1) {
+ image1.src = URL.createObjectURL(blob1);
+ });
+ } else if (typeVal == "empty" && qualityVal != "empty") {
+ canvas.toBlob(function(blob1) {
+ image1.src = URL.createObjectURL(blob1);
+ }, "image/png", qualityVal);
+ } else if (typeVal != "empty" && qualityVal == "empty") {
+ canvas.toBlob(function(blob1) {
+ image1.src = URL.createObjectURL(blob1);
+ }, typeVal, 1.0);
+ } else {
+ canvas.toBlob(function(blob1) {
+ image1.src = URL.createObjectURL(blob1);
+ }, typeVal, qualityVal);
+ }
+ image2.src = URL.createObjectURL(blob2);
+ image1.onload = image2.onload = t.step_func(function() {
+ imageLoadedCounter++;
+ if (imageLoadedCounter == 2) {
+ compareImages(image1, image2);
+ t.done();
+ }
+ });
+}
+
+async_test(function(t) {
+ var worker = makeWorker(t);
+ worker.addEventListener('message', t.step_func(function(msg) {
+ compareWithToBlob(t, "empty", "empty", msg.data);
+ }));
+ worker.postMessage('test1');
+}, "Test that convertToBlob with default arguments produces correct result in a worker");
+
+async_test(function(t) {
+ var worker = makeWorker(t);
+ worker.addEventListener('message', t.step_func(function(msg) {
+ compareWithToBlob(t, "empty", 1.0, msg.data);
+ }));
+ worker.postMessage('test2');
+}, "Test that convertToBlob with default type/1.0 quality produces correct result in a worker");
+
+async_test(function(t) {
+ var worker = makeWorker(t);
+ worker.addEventListener('message', t.step_func(function(msg) {
+ compareWithToBlob(t, "empty", 0.2, msg.data);
+ }));
+ worker.postMessage('test3');
+}, "Test that convertToBlob with default type/0.2 quality produces correct result in a worker");
+
+async_test(function(t) {
+ var worker = makeWorker(t);
+ worker.addEventListener('message', t.step_func(function(msg) {
+ compareWithToBlob(t, "image/png", "empty", msg.data);
+ }));
+ worker.postMessage('test4');
+}, "Test that convertToBlob with png/default quality produces correct result in a worker");
+
+async_test(function(t) {
+ var worker = makeWorker(t);
+ worker.addEventListener('message', t.step_func(function(msg) {
+ compareWithToBlob(t, "image/png", 1.0, msg.data);
+ }));
+ worker.postMessage('test5');
+}, "Test that convertToBlob with png/1.0 quality produces correct result in a worker");
+
+async_test(function(t) {
+ var worker = makeWorker(t);
+ worker.addEventListener('message', t.step_func(function(msg) {
+ compareWithToBlob(t, "image/png", 0.2, msg.data);
+ }));
+ worker.postMessage('test6');
+}, "Test that convertToBlob with png/0.2 quality produces correct result in a worker");
+
+async_test(function(t) {
+ var worker = makeWorker(t);
+ worker.addEventListener('message', t.step_func(function(msg) {
+ compareWithToBlob(t, "image/jpeg", "empty", msg.data);
+ }));
+ worker.postMessage('test7');
+}, "Test that convertToBlob with jpeg/default quality produces correct result in a worker");
+
+async_test(function(t) {
+ var worker = makeWorker(t);
+ worker.addEventListener('message', t.step_func(function(msg) {
+ compareWithToBlob(t, "image/jpeg", 1.0, msg.data);
+ }));
+ worker.postMessage('test8');
+}, "Test that convertToBlob with jpeg/1.0 quality produces correct result in a worker");
+
+async_test(function(t) {
+ var worker = makeWorker(t);
+ worker.addEventListener('message', t.step_func(function(msg) {
+ compareWithToBlob(t, "image/jpeg", 0.2, msg.data);
+ }));
+ worker.postMessage('test9');
+}, "Test that convertToBlob with jpeg/0.2 quality produces correct result in a worker");
+
+async_test(function(t) {
+ var worker = makeWorker(t);
+ worker.addEventListener('message', t.step_func(function(msg) {
+ compareWithToBlob(t, "image/webp", "empty", msg.data);
+ }));
+ worker.postMessage('test10');
+}, "Test that convertToBlob with webp/default quality produces correct result in a worker");
+
+async_test(function(t) {
+ var worker = makeWorker(t);
+ worker.addEventListener('message', t.step_func(function(msg) {
+ compareWithToBlob(t, "image/webp", 1.0, msg.data);
+ }));
+ worker.postMessage('test11');
+}, "Test that convertToBlob with webp/1.0 quality produces correct result in a worker");
+
+async_test(function(t) {
+ var worker = makeWorker(t);
+ worker.addEventListener('message', t.step_func(function(msg) {
+ compareWithToBlob(t, "image/webp", 0.2, msg.data);
+ }));
+ worker.postMessage('test12');
+}, "Test that convertToBlob with webp/0.2 quality produces correct result in a worker");
+
+async_test(function(t) {
+ var worker = makeWorker(t);
+ worker.addEventListener('message', t.step_func_done(function(msg) {
+ if (msg.data instanceof Object)
+ return;
+ assert_true(msg.data);
+ t.done();
+ }));
+ worker.postMessage('test13');
+}, "Test that call convertToBlob on a detached OffscreenCanvas throws exception in a worker");
+
+async_test(function(t) {
+ var worker = makeWorker(t);
+ worker.addEventListener('message', t.step_func_done(function(msg) {
+ assert_true(msg.data);
+ t.done();
+ }));
+ worker.postMessage('test14');
+}, "Test that call convertToBlob on a OffscreenCanvas with size 0 throws exception in a worker");
+
+async_test(function(t) {
+ var img = new Image();
+ img.src = "/images/green.png";
+ img.crossOrigin = "anonymous";
+ img.onload = t.step_func_done(() => {
+ createImageBitmap(img).then(t.step_func_done(bitmap => {
+ var worker = makeWorker(t);
+ worker.addEventListener('message', t.step_func_done(function(msg) {
+ assert_true(msg.data);
+ t.done();
+ }));
+ worker.postMessage(bitmap);
+ }));
+ });
+}, "Test that call convertToBlob on a OffscreenCanvas with tainted origin throws exception in a worker");
+
+</script>
+
diff --git a/testing/web-platform/tests/html/canvas/offscreen/manual/draw-generic-family/2d.text.draw.generic.family.html b/testing/web-platform/tests/html/canvas/offscreen/manual/draw-generic-family/2d.text.draw.generic.family.html
new file mode 100644
index 0000000000..a5fd7ab066
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/manual/draw-generic-family/2d.text.draw.generic.family.html
@@ -0,0 +1,49 @@
+<!DOCTYPE html>
+<title>OffscreenCanvas test: 2d.text.draw.generic.family</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+<script>
+function drawCanvas(ctx, family)
+{
+ ctx.font = '16px ' + family;
+ ctx.fillText(family, 0, 16);
+}
+
+function testDrawGenericFamily(family)
+{
+ let offscreenCanvas = new OffscreenCanvas(88, 24);
+ let oCtx = offscreenCanvas.getContext('2d');
+ drawCanvas(oCtx, family);
+ let canvas = document.createElement('canvas');
+ let ctx = canvas.getContext('2d');
+ drawCanvas(ctx, family);
+
+ let data1 = oCtx.getImageData(0, 0, 88, 24).data;
+ let data2 = ctx.getImageData(0, 0, 88, 24).data;
+ assert_array_equals(data1, data2,
+ "The image data generated by drawing generic font family '" + family +
+ "' should be the same for both OffscreenCanvas and regular canvas");
+}
+
+test(function() {
+ testDrawGenericFamily('sans-serif');
+}, "Test that drawing sans-serif produces the same result between canvas and OffscreenCanvas");
+
+test(function() {
+ testDrawGenericFamily('serif');
+}, "Test that drawing serif produces the same result between canvas and OffscreenCanvas");
+
+test(function() {
+ testDrawGenericFamily('cursive');
+}, "Test that drawing cursive produces the same result between canvas and OffscreenCanvas");
+
+test(function() {
+ testDrawGenericFamily('fantasy');
+}, "Test that drawing fantasy produces the same result between canvas and OffscreenCanvas");
+
+test(function() {
+ testDrawGenericFamily('monospace');
+}, "Test that drawing monospace produces the same result between canvas and OffscreenCanvas");
+</script>
+
diff --git a/testing/web-platform/tests/html/canvas/offscreen/manual/draw-generic-family/2d.text.draw.generic.family.w.html b/testing/web-platform/tests/html/canvas/offscreen/manual/draw-generic-family/2d.text.draw.generic.family.w.html
new file mode 100644
index 0000000000..7a88c032ad
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/manual/draw-generic-family/2d.text.draw.generic.family.w.html
@@ -0,0 +1,52 @@
+<!DOCTYPE html>
+<title>OffscreenCanvas test: 2d.text.draw.generic.family.w</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+<script id='myWorker' type='text/worker'>
+self.onmessage = function(e) {
+ let oc = new OffscreenCanvas(88, 24);
+ let ctx = oc.getContext('2d');
+ ctx.font = '32px ' + e.data.family;
+ ctx.fillText(e.data.family, 0, 16);
+ self.postMessage(ctx.getImageData(0, 0, 88, 24).data);
+};
+</script>
+<script>
+function testDrawGenericFamily(t, family)
+{
+ let blob = new Blob([document.getElementById('myWorker').textContent]);
+ let worker = new Worker(URL.createObjectURL(blob));
+ worker.addEventListener('message', msg => {
+ let ctx = document.createElement('canvas').getContext('2d');
+ ctx.font = '32px ' + family;
+ ctx.fillText(family, 0, 16);
+ assert_array_equals(ctx.getImageData(0, 0, 88, 24).data, msg.data,
+ "The image data generated by drawing generic font family '" + family +
+ "' should be the same for both OffscreenCanvas and regular canvas");
+ t.done();
+ });
+ worker.postMessage({family: family});
+}
+
+async_test(function(t) {
+ testDrawGenericFamily(t, 'sans-serif');
+}, "Test that drawing sans-serif produces the same result between canvas and OffscreenCanvas in a Worker");
+
+async_test(function(t) {
+ testDrawGenericFamily(t, 'serif');
+}, "Test that drawing serif produces the same result between canvas and OffscreenCanvas in a Worker");
+
+async_test(function(t) {
+ testDrawGenericFamily(t, 'cursive');
+}, "Test that drawing cursive produces the same result between canvas and OffscreenCanvas in a Worker");
+
+async_test(function(t) {
+ testDrawGenericFamily(t, 'fantasy');
+}, "Test that drawing fantasy produces the same result between canvas and OffscreenCanvas in a Worker");
+
+async_test(function(t) {
+ testDrawGenericFamily(t, 'monospace');
+}, "Test that drawing monospace produces the same result between canvas and OffscreenCanvas in a Worker");
+</script>
+
diff --git a/testing/web-platform/tests/html/canvas/offscreen/manual/filter/offscreencanvas.filter.html b/testing/web-platform/tests/html/canvas/offscreen/manual/filter/offscreencanvas.filter.html
new file mode 100644
index 0000000000..25691983f1
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/manual/filter/offscreencanvas.filter.html
@@ -0,0 +1,27 @@
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="offscreencanvas.filter.js"></script>
+<script>
+var patternCanvas = createPatternCanvas();
+
+var getOffscreenContextForFilter = function(filter, pattern) {
+ var oc = new OffscreenCanvas(80, 80);
+ var offCtx = oc.getContext('2d');
+ offCtx.filter = filter;
+ offCtx.drawImage(pattern, 5, 5);
+ offCtx.drawImage(pattern, 25, 25);
+ offCtx.drawImage(pattern, 45, 45);
+ return offCtx;
+};
+
+var testFilter = function(filter) {
+ var offCtx = getOffscreenContextForFilter(filter, patternCanvas);
+ var ctx = getRegularContextForFilter(filter, patternCanvas);
+ var offImageData = offCtx.getImageData(0, 0, 80, 80).data;
+ var imageData = ctx.getImageData(0, 0, 80, 80).data;
+ matchImageDataResults(offImageData, imageData, filter);
+};
+
+generate_tests(testFilter, [filters]);
+
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/manual/filter/offscreencanvas.filter.js b/testing/web-platform/tests/html/canvas/offscreen/manual/filter/offscreencanvas.filter.js
new file mode 100644
index 0000000000..cb2e245803
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/manual/filter/offscreencanvas.filter.js
@@ -0,0 +1,48 @@
+var getRegularContextForFilter = function(filter, pattern) {
+ var c = document.createElement("canvas");
+ c.width = c.height = 80;
+ var ctx = c.getContext('2d');
+ ctx.filter = filter;
+ ctx.drawImage(pattern, 5, 5);
+ ctx.drawImage(pattern, 25, 25);
+ ctx.drawImage(pattern, 45, 45);
+ return ctx;
+};
+
+var matchImageDataResults = function(offscreenImage, regularImage, filter) {
+ assert_array_equals(offscreenImage, regularImage,
+ "The image data generated by filter " +
+ filter +
+ " should be the same for both OffscreenCanvas and regular canvas");
+};
+
+var createPatternCanvas = function() {
+ var patternCanvas = document.createElement('canvas');
+ patternCanvas.width = 20;
+ patternCanvas.height = 20;
+ var patternCtx = patternCanvas.getContext('2d');
+ patternCtx.fillStyle = '#A00';
+ patternCtx.fillRect(0, 0, 10, 10);
+ patternCtx.fillStyle = '#0A0';
+ patternCtx.fillRect(10, 0, 10, 10);
+ patternCtx.fillStyle = '#00A';
+ patternCtx.fillRect(0, 10, 10, 10);
+ patternCtx.fillStyle = "#AA0";
+ patternCtx.fillRect(10, 10, 10, 10);
+ return patternCanvas;
+};
+
+var filters = [ "none" ,
+ "blur(10px)" ,
+ "brightness(40%)" ,
+ "contrast(20%)" ,
+ "drop-shadow(0 0 5px green)" ,
+ "grayscale(100%)" ,
+ "invert(100%)" ,
+ "opacity(50%)" ,
+ "saturate(20%)" ,
+ "sepia(100%)" ,
+ "sepia(1) hue-rotate(200deg)",
+ "url(#url)" ];
+
+
diff --git a/testing/web-platform/tests/html/canvas/offscreen/manual/filter/offscreencanvas.filter.w.html b/testing/web-platform/tests/html/canvas/offscreen/manual/filter/offscreencanvas.filter.w.html
new file mode 100644
index 0000000000..d6ed915b53
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/manual/filter/offscreencanvas.filter.w.html
@@ -0,0 +1,54 @@
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="offscreencanvas.filter.js"></script>
+<script id='myWorker' type='text/worker'>
+self.onmessage = function(e) {
+ var getOffscreenCanvasForFilter = function(filter, pattern) {
+ var oc = new OffscreenCanvas(80, 80);
+ var offCtx = oc.getContext('2d');
+ offCtx.filter = filter;
+ offCtx.drawImage(pattern, 5, 5);
+ offCtx.drawImage(pattern, 25, 25);
+ offCtx.drawImage(pattern, 45, 45);
+ return oc;
+ };
+
+ var filters = e.data.filters;
+ var pattern = e.data.pattern;
+ var ret = [];
+ for (var i = 0; i < filters.length; i++) {
+ var oc = getOffscreenCanvasForFilter(filters[i], pattern);
+ var imageBitmap = oc.transferToImageBitmap();
+ ret.push(imageBitmap);
+ }
+ self.postMessage(ret, ret);
+};
+</script>
+<script>
+var patternCanvas = createPatternCanvas();
+
+// Build a list of image data on regular canvas with different filters
+var listCanvasImageData = [];
+for (var j = 0; j < filters.length; j++) {
+ var ctx = getRegularContextForFilter(filters[j], patternCanvas);
+ listCanvasImageData.push(ctx.getImageData(0, 0, 80, 80).data);
+}
+
+function consumeImageBitmap(patternImage) {
+ async_test(t => {
+ var blob = new Blob([document.getElementById('myWorker').textContent]);
+ var worker = new Worker(URL.createObjectURL(blob));
+ worker.addEventListener('message', msg => {
+ for (var i = 0; i < msg.data.length; ++i) {
+ var outputCtx = document.createElement("canvas").getContext('2d');
+ outputCtx.drawImage(msg.data[i], 0, 0, 80, 80);
+ matchImageDataResults(outputCtx.getImageData(0, 0, 80, 80).data, listCanvasImageData[i], filters[i]);
+ }
+ t.done();
+ });
+ worker.postMessage({filters: filters, pattern: patternImage}, [patternImage]);
+ });
+}
+
+createImageBitmap(patternCanvas).then(consumeImageBitmap);
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/manual/image-smoothing/image.smoothing.html b/testing/web-platform/tests/html/canvas/offscreen/manual/image-smoothing/image.smoothing.html
new file mode 100644
index 0000000000..a78524c51d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/manual/image-smoothing/image.smoothing.html
@@ -0,0 +1,128 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>OffscreenCanvasRenderingContext2D imageSmoothingEnabled test</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<link rel="help" href="https://html.spec.whatwg.org/#the-offscreen-2d-rendering-context">
+<script>
+function createTestImage() {
+ var image = new OffscreenCanvas(100, 50);
+ var imgctx = image.getContext('2d');
+ imgctx.fillStyle = "#F00";
+ imgctx.fillRect(0, 0, 2, 2);
+ imgctx.fillStyle = "#0F0";
+ imgctx.fillRect(0, 0, 1, 1);
+ return image;
+}
+
+test(function() {
+ var offscreenCanvas = new OffscreenCanvas(100, 50);
+ var ctx = offscreenCanvas.getContext('2d');
+ assert_true(ctx.imageSmoothingEnabled);
+}, "When the context is created, imageSmoothingEnabled must be set to true.");
+
+test(function() {
+ var offscreenCanvas = new OffscreenCanvas(100, 50);
+ var ctx = offscreenCanvas.getContext('2d');
+ ctx.imageSmoothingEnabled = false;
+ assert_false(ctx.imageSmoothingEnabled);
+}, "On getting imageSmoothingEnabled, the user agent must return the last value it was set to.");
+
+test(function() {
+ var offscreenCanvas = new OffscreenCanvas(100, 50);
+ var ctx = offscreenCanvas.getContext('2d');
+ var image = createTestImage();
+ ctx.scale(10, 10);
+ ctx.drawImage(image, 0, 0);
+ var pixels = ctx.getImageData(9, 9, 1, 1).data;
+ assert_not_equals(pixels[0], 0);
+ assert_not_equals(pixels[1], 255);
+}, "Test that image smoothing is actually on by default.");
+
+test(function() {
+ var offscreenCanvas = new OffscreenCanvas(100, 50);
+ var ctx = offscreenCanvas.getContext('2d');
+ ctx.imageSmoothingEnabled = true;
+ var image = createTestImage();
+ ctx.scale(10, 10);
+ ctx.drawImage(image, 0, 0);
+ var pixels = ctx.getImageData(9, 9, 1, 1).data;
+ assert_not_equals(pixels[0], 0);
+ assert_not_equals(pixels[1], 255);
+}, "Test that image smoothing works when imageSmoothingEnabled is set to true");
+
+test(function() {
+ var offscreenCanvas = new OffscreenCanvas(100, 50);
+ var ctx = offscreenCanvas.getContext('2d');
+ var image = createTestImage();
+ ctx.imageSmoothingEnabled = false;
+ ctx.scale(10, 10);
+ ctx.drawImage(image, 0, 0);
+ var pixels = ctx.getImageData(9, 9, 1, 1).data;
+ assert_array_equals(pixels, [0, 255, 0, 255]);
+}, "Test that imageSmoothingEnabled = false (nearest-neighbor interpolation) works with drawImage().");
+
+test(function() {
+ var offscreenCanvas = new OffscreenCanvas(100, 50);
+ var ctx = offscreenCanvas.getContext('2d');
+ var image = createTestImage();
+ ctx.imageSmoothingEnabled = false;
+ ctx.scale(10, 10);
+ ctx.fillStyle = ctx.createPattern(image, 'repeat');
+ ctx.fillRect(0, 0, 10, 10);
+ var pixels = ctx.getImageData(9, 9, 1, 1).data;
+ assert_array_equals(pixels, [0, 255, 0, 255]);
+}, "Test that imageSmoothingEnabled = false (nearest-neighbor interpolation) works with fillRect and createPattern().");
+
+test(function() {
+ var offscreenCanvas = new OffscreenCanvas(100, 50);
+ var ctx = offscreenCanvas.getContext('2d');
+ var image = createTestImage();
+ ctx.imageSmoothingEnabled = false;
+ ctx.fillStyle = ctx.createPattern(image, 'repeat');
+ ctx.scale(10, 10);
+ ctx.rect(0, 0, 10, 10);
+ ctx.fill();
+ var pixels = ctx.getImageData(9, 9, 1, 1).data;
+ assert_array_equals(pixels, [0, 255, 0, 255]);
+}, "Test that imageSmoothingEnabled = false (nearest-neighbor interpolation) works with fill() and createPattern().");
+
+test(function() {
+ var offscreenCanvas = new OffscreenCanvas(100, 50);
+ var ctx = offscreenCanvas.getContext('2d');
+ var image = createTestImage();
+ ctx.strokeStyle = ctx.createPattern(image, 'repeat');
+ ctx.lineWidth = 5;
+ ctx.imageSmoothingEnabled = false;
+ ctx.scale(10, 10);
+ ctx.beginPath();
+ ctx.moveTo(0, 0);
+ ctx.lineTo(10, 10);
+ ctx.stroke();
+ var pixels = ctx.getImageData(9, 9, 1, 1).data;
+ assert_array_equals(pixels, [0, 255, 0, 255]);
+}, "Test that imageSmoothingEnabled = false (nearest-neighbor interpolation) works with stroke() and createPattern().");
+
+test(function() {
+ var repaints = 5;
+ var offscreenCanvas = new OffscreenCanvas(100, 50);
+ var ctx = offscreenCanvas.getContext('2d');
+
+ function draw() {
+ ctx.clearRect(0, 0, 10, 10);
+ ctx.setTransform(1, 0, 0, 1, 0, 0);
+ var image = createTestImage();
+ ctx.imageSmoothingEnabled = false;
+ ctx.scale(10, 10);
+ ctx.drawImage(image, 0, 0);
+ var pixels = ctx.getImageData(9, 9, 1, 1).data;
+ assert_array_equals(pixels, [0, 255, 0, 255]);
+ }
+
+ while (repaints > 0) {
+ draw();
+ repaints = repaints - 1;
+ }
+
+}, "Test that imageSmoothingEnabled = false (nearest-neighbor interpolation) still works after repaints.");
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/manual/image-smoothing/image.smoothing.worker.js b/testing/web-platform/tests/html/canvas/offscreen/manual/image-smoothing/image.smoothing.worker.js
new file mode 100644
index 0000000000..4c37e84b1f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/manual/image-smoothing/image.smoothing.worker.js
@@ -0,0 +1,126 @@
+// spec link: https://html.spec.whatwg.org/#the-offscreen-2d-rendering-context
+
+importScripts("/resources/testharness.js");
+
+function createTestImage() {
+ var image = new OffscreenCanvas(100, 50);
+ var imgctx = image.getContext('2d');
+ imgctx.fillStyle = "#F00";
+ imgctx.fillRect(0, 0, 2, 2);
+ imgctx.fillStyle = "#0F0";
+ imgctx.fillRect(0, 0, 1, 1);
+ return image;
+}
+
+test(function() {
+ var offscreenCanvas = new OffscreenCanvas(100, 50);
+ var ctx = offscreenCanvas.getContext('2d');
+ assert_true(ctx.imageSmoothingEnabled);
+}, "When the context is created, imageSmoothingEnabled must be set to true.");
+
+test(function() {
+ var offscreenCanvas = new OffscreenCanvas(100, 50);
+ var ctx = offscreenCanvas.getContext('2d');
+ ctx.imageSmoothingEnabled = false;
+ assert_false(ctx.imageSmoothingEnabled);
+}, "On getting imageSmoothingEnabled, the user agent must return the last value it was set to.");
+
+test(function() {
+ var offscreenCanvas = new OffscreenCanvas(100, 50);
+ var ctx = offscreenCanvas.getContext('2d');
+ var image = createTestImage();
+ ctx.scale(10, 10);
+ ctx.drawImage(image, 0, 0);
+ var pixels = ctx.getImageData(9, 9, 1, 1).data;
+ assert_not_equals(pixels[0], 0);
+ assert_not_equals(pixels[1], 255);
+}, "Test that image smoothing is actually on by default.");
+
+test(function() {
+ var offscreenCanvas = new OffscreenCanvas(100, 50);
+ var ctx = offscreenCanvas.getContext('2d');
+ ctx.imageSmoothingEnabled = true;
+ var image = createTestImage();
+ ctx.scale(10, 10);
+ ctx.drawImage(image, 0, 0);
+ var pixels = ctx.getImageData(9, 9, 1, 1).data;
+ assert_not_equals(pixels[0], 0);
+ assert_not_equals(pixels[1], 255);
+}, "Test that image smoothing works when imageSmoothingEnabled is set to true");
+
+test(function() {
+ var offscreenCanvas = new OffscreenCanvas(100, 50);
+ var ctx = offscreenCanvas.getContext('2d');
+ var image = createTestImage();
+ ctx.imageSmoothingEnabled = false;
+ ctx.scale(10, 10);
+ ctx.drawImage(image, 0, 0);
+ var pixels = ctx.getImageData(9, 9, 1, 1).data;
+ assert_array_equals(pixels, [0, 255, 0, 255]);
+}, "Test that imageSmoothingEnabled = false (nearest-neighbor interpolation) works with drawImage().");
+
+test(function() {
+ var offscreenCanvas = new OffscreenCanvas(100, 50);
+ var ctx = offscreenCanvas.getContext('2d');
+ var image = createTestImage();
+ ctx.imageSmoothingEnabled = false;
+ ctx.scale(10, 10);
+ ctx.fillStyle = ctx.createPattern(image, 'repeat');
+ ctx.fillRect(0, 0, 10, 10);
+ var pixels = ctx.getImageData(9, 9, 1, 1).data;
+ assert_array_equals(pixels, [0, 255, 0, 255]);
+}, "Test that imageSmoothingEnabled = false (nearest-neighbor interpolation) works with fillRect and createPattern().");
+
+test(function() {
+ var offscreenCanvas = new OffscreenCanvas(100, 50);
+ var ctx = offscreenCanvas.getContext('2d');
+ var image = createTestImage();
+ ctx.imageSmoothingEnabled = false;
+ ctx.fillStyle = ctx.createPattern(image, 'repeat');
+ ctx.scale(10, 10);
+ ctx.rect(0, 0, 10, 10);
+ ctx.fill();
+ var pixels = ctx.getImageData(9, 9, 1, 1).data;
+ assert_array_equals(pixels, [0, 255, 0, 255]);
+}, "Test that imageSmoothingEnabled = false (nearest-neighbor interpolation) works with fill() and createPattern().");
+
+test(function() {
+ var offscreenCanvas = new OffscreenCanvas(100, 50);
+ var ctx = offscreenCanvas.getContext('2d');
+ var image = createTestImage();
+ ctx.strokeStyle = ctx.createPattern(image, 'repeat');
+ ctx.lineWidth = 5;
+ ctx.imageSmoothingEnabled = false;
+ ctx.scale(10, 10);
+ ctx.beginPath();
+ ctx.moveTo(0, 0);
+ ctx.lineTo(10, 10);
+ ctx.stroke();
+ var pixels = ctx.getImageData(9, 9, 1, 1).data;
+ assert_array_equals(pixels, [0, 255, 0, 255]);
+}, "Test that imageSmoothingEnabled = false (nearest-neighbor interpolation) works with stroke() and createPattern().");
+
+test(function() {
+ var repaints = 5;
+ var offscreenCanvas = new OffscreenCanvas(100, 50);
+ var ctx = offscreenCanvas.getContext('2d');
+
+ function draw() {
+ ctx.clearRect(0, 0, 10, 10);
+ ctx.setTransform(1, 0, 0, 1, 0, 0);
+ var image = createTestImage();
+ ctx.imageSmoothingEnabled = false;
+ ctx.scale(10, 10);
+ ctx.drawImage(image, 0, 0);
+ var pixels = ctx.getImageData(9, 9, 1, 1).data;
+ assert_array_equals(pixels, [0, 255, 0, 255]);
+ }
+
+ while (repaints > 0) {
+ draw();
+ repaints = repaints - 1;
+ }
+
+}, "Test that imageSmoothingEnabled = false (nearest-neighbor interpolation) still works after repaints.");
+
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.commit.html b/testing/web-platform/tests/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.commit.html
new file mode 100644
index 0000000000..4ee68b430f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.commit.html
@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+<link rel="help" href="https://html.spec.whatwg.org/#offscreencontext2d-commit">
+<script>
+
+function verifyPlaceholder(placeholder, expectedR, expectedG, expectedB, expectedA, expectedClrStr)
+{
+ var canvas = document.createElement('canvas');
+ canvas.width = canvas.height = 10;
+ var ctx = canvas.getContext('2d');
+ ctx.drawImage(placeholder, 0, 0);
+ _assertPixel(canvas, 5,5, expectedR, expectedG, expectedB, expectedA);
+}
+
+async_test(function(t) {
+ var placeholder = document.createElement('canvas');
+ placeholder.width = placeholder.height = 10;
+ var offscreenCanvas = placeholder.transferControlToOffscreen();
+ var ctx = offscreenCanvas.getContext('2d');
+ ctx.fillStyle = "#0f0";
+ ctx.fillRect(0, 0, 10, 10);
+ // commit() propagation is taken care of by an async task, which means the
+ // place holder contents should still be transparent black at this moment.
+ verifyPlaceholder(placeholder, 0,0,0,0, "0,0,0,0");
+ // Set timeout acts as a sync barrier to allow commit to propagate
+ t.step_timeout(function() {
+ verifyPlaceholder(placeholder, 0,255,0,255, "0,255,0,255");
+ t.done();
+ }, 0);
+}, "Test that calling OffscreenCanvas's commit pushes its contents to its placeholder.");
+
+test(function() {
+ var offscreenCanvas = new OffscreenCanvas(10, 10);
+ var ctx = offscreenCanvas.getContext('2d');
+ ctx.fillStyle = "#0f0";
+ ctx.fillRect(0, 0, 10, 10);
+ ctx.commit();
+}, "Test that calling commit on an OffscreenCanvas that is not transferred from a HTMLCanvasElement is a noop.");
+
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.commit.w.html b/testing/web-platform/tests/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.commit.w.html
new file mode 100644
index 0000000000..7d1d2c85f9
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.commit.w.html
@@ -0,0 +1,79 @@
+<!DOCTYPE html>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+<link rel="help" href="https://html.spec.whatwg.org/#offscreencontext2d-commit">
+
+<script id="myWorker" type="text/worker">
+
+function testCommitPushesContents(offscreenCanvas) {
+ try {
+ var ctx = offscreenCanvas.getContext('2d');
+ ctx.fillStyle = "#0f0";
+ ctx.fillRect(0, 0, 10, 10);
+ ctx.commit();
+ return true;
+ } catch(e) {
+ return false;
+ }
+}
+
+function testCommitException() {
+ var offscreenCanvas = new OffscreenCanvas(10, 10);
+ var ctx = offscreenCanvas.getContext('2d');
+ ctx.fillStyle = "#0f0";
+ ctx.fillRect(0, 0, 10, 10);
+ return true;
+}
+
+self.onmessage = function(e) {
+ switch (e.data.msg) {
+ case 'test1':
+ self.postMessage(testCommitPushesContents(e.data.data));
+ break;
+ case 'test2':
+ self.postMessage(testCommitException());
+ break;
+ }
+};
+
+</script>
+
+<script>
+
+function verifyPlaceholder(placeholder) {
+ var canvas = document.createElement('canvas');
+ canvas.width = canvas.height = 10;
+ var ctx = canvas.getContext('2d');
+ ctx.drawImage(placeholder, 0, 0);
+ _assertPixel(canvas, 5,5, 0,255,0,255);
+}
+
+function makeWorker(test) {
+ var blob = new Blob([document.getElementById("myWorker").textContent]);
+ var worker = new Worker(URL.createObjectURL(blob));
+ worker.onerror = test.unreached_func("error");
+ return worker;
+}
+
+async_test(function(t) {
+ var placeholder = document.createElement('canvas');
+ placeholder.width = placeholder.height = 10;
+ var offscreenCanvas = placeholder.transferControlToOffscreen();
+ var worker = makeWorker(t);
+ worker.addEventListener('message', t.step_func_done(function(msg) {
+ assert_true(msg.data);
+ verifyPlaceholder(placeholder);
+ }));
+ worker.postMessage({msg: 'test1', data: offscreenCanvas}, [offscreenCanvas]);
+}, "Test that calling OffscreenCanvas's commit pushes its contents to its placeholder.");
+
+async_test(function(t) {
+ var worker = makeWorker(t);
+ worker.addEventListener('message', t.step_func_done(function(msg) {
+ assert_true(msg.data);
+ }));
+ worker.postMessage({msg: 'test2'});
+}, "Test that calling commit on an OffscreenCanvas that is not transferred from a HTMLCanvasElement throws an exception in a worker.");
+
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.constructor.html b/testing/web-platform/tests/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.constructor.html
new file mode 100644
index 0000000000..0665f7452c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.constructor.html
@@ -0,0 +1,43 @@
+<!DOCTYPE html>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+<link rel="help" href="https://html.spec.whatwg.org/#dom-offscreencanvas">
+<script>
+
+test(function() {
+ var offscreenCanvas = new OffscreenCanvas(100, 50);
+ assert_equals(offscreenCanvas.width, 100);
+ assert_equals(offscreenCanvas.height, 50);
+
+ offscreenCanvas.width = 50;
+ offscreenCanvas.height = 100;
+ assert_equals(offscreenCanvas.width, 50);
+ assert_equals(offscreenCanvas.height, 100);
+}, "Test that calling OffscreenCanvas's constructor generates correct width and height.");
+
+test(function() {
+ var offscreenCanvas1 = new OffscreenCanvas(1, 1);
+
+ offscreenCanvas1.width = null;
+ offscreenCanvas1.height = null;
+ assert_equals(offscreenCanvas1.width, 0);
+ assert_equals(offscreenCanvas1.height, 0);
+
+ assert_throws_js(TypeError, function() { new OffscreenCanvas(-1, -1); });
+
+ var offscreenCanvas2 = new OffscreenCanvas(null, null);
+ assert_equals(offscreenCanvas2.width, 0);
+ assert_equals(offscreenCanvas2.height, 0);
+
+ assert_throws_js(TypeError, function() { offscreenCanvas2.width = -1; });
+ assert_throws_js(TypeError, function() { offscreenCanvas2.height = -1; });
+
+ var obj = {Name: "John Doe", Age: 30};
+ assert_throws_js(TypeError, function() { offscreenCanvas2.width = obj; });
+ assert_throws_js(TypeError, function() { offscreenCanvas2.height = obj; });
+ assert_throws_js(TypeError, function() { new OffscreenCanvas(obj, obj); });
+}, "Test that OffscreenCanvas constructor handles invalid arguments correctly");
+
+</script>
+
diff --git a/testing/web-platform/tests/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.constructor.worker.js b/testing/web-platform/tests/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.constructor.worker.js
new file mode 100644
index 0000000000..72cfb728f0
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.constructor.worker.js
@@ -0,0 +1,45 @@
+// spec link: https://html.spec.whatwg.org/#dom-offscreencanvas
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t1 = async_test("Test that calling OffscreenCanvas's constructor generates correct width and height.");
+t1.step(function() {
+ var offscreenCanvas = new OffscreenCanvas(100, 50);
+ assert_equals(offscreenCanvas.width, 100);
+ assert_equals(offscreenCanvas.height, 50);
+
+ offscreenCanvas.width = 50;
+ offscreenCanvas.height = 100;
+ assert_equals(offscreenCanvas.width, 50);
+ assert_equals(offscreenCanvas.height, 100);
+ t1.done();
+});
+
+var t2 = async_test("Test that OffscreenCanvas constructor handles invalid arguments correctly in a worker");
+t2.step(function() {
+ var offscreenCanvas1 = new OffscreenCanvas(1, 1);
+
+ offscreenCanvas1.width = null;
+ offscreenCanvas1.height = null;
+ assert_equals(offscreenCanvas1.width, 0);
+ assert_equals(offscreenCanvas1.height, 0);
+
+ assert_throws_js(TypeError, function() { new OffscreenCanvas(-1, -1); });
+
+ var offscreenCanvas2 = new OffscreenCanvas(null, null);
+ assert_equals(offscreenCanvas2.width, 0);
+ assert_equals(offscreenCanvas2.height, 0);
+
+ assert_throws_js(TypeError, function() { offscreenCanvas2.width = -1; });
+ assert_throws_js(TypeError, function() { offscreenCanvas2.height = -1; });
+
+ var obj = {Name: "John Doe", Age: 30};
+ assert_throws_js(TypeError, function() { offscreenCanvas2.width = obj; });
+ assert_throws_js(TypeError, function() { offscreenCanvas2.height = obj; });
+ assert_throws_js(TypeError, function() { new OffscreenCanvas(obj, obj); });
+ t2.done();
+});
+
+done();
+
diff --git a/testing/web-platform/tests/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.getcontext.html b/testing/web-platform/tests/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.getcontext.html
new file mode 100644
index 0000000000..51c167ddca
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.getcontext.html
@@ -0,0 +1,80 @@
+<!DOCTYPE html>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+<link rel="help" href="https://html.spec.whatwg.org/#dom-offscreencanvas-getcontext">
+<script>
+
+test(function() {
+ var offscreenCanvas = new OffscreenCanvas(1, 1);
+ assert_throws_js(TypeError, function() { offscreenCanvas.getContext('3d'); });
+}, "Test that getContext with un-supported string throws a TypeError.");
+
+test(function() {
+ var offscreenCanvas1 = new OffscreenCanvas(1, 1);
+ var ctx1 = offscreenCanvas1.getContext('2d');
+ assert_true(ctx1 instanceof OffscreenCanvasRenderingContext2D);
+
+ var offscreenCanvas2 = new OffscreenCanvas(1, 1);
+ var ctx2 = offscreenCanvas2.getContext('webgl');
+ assert_true(ctx2 instanceof WebGLRenderingContext);
+
+ var offscreenCanvas3 = new OffscreenCanvas(1, 1);
+ var ctx3 = offscreenCanvas3.getContext('webgl2');
+ assert_true(ctx3 instanceof WebGL2RenderingContext);
+}, "Test that getContext with supported string returns correct results");
+
+test(function() {
+ var offscreenCanvas1 = new OffscreenCanvas(1, 1);
+ var ctx1 = offscreenCanvas1.getContext('2d');
+ var ctx2 = offscreenCanvas1.getContext('webgl');
+ assert_equals(ctx2, null);
+
+ var offscreenCanvas2 = new OffscreenCanvas(1, 1);
+ var ctx3 = offscreenCanvas2.getContext('webgl');
+ var ctx4 = offscreenCanvas2.getContext('2d');
+ assert_equals(ctx4, null);
+}, "Test that getContext twice with different context type returns null the second time");
+
+test(function() {
+ var offscreenCanvas = new OffscreenCanvas(1, 2);
+ var ctx = offscreenCanvas.getContext('2d');
+ var dstCanvas = ctx.canvas;
+ assert_equals(dstCanvas.width, 1);
+ assert_equals(dstCanvas.height, 2);
+}, "Test that 2dcontext.canvas should return the original OffscreenCanvas");
+
+test(function() {
+ var offscreenCanvas = new OffscreenCanvas(1, 2);
+ var ctx = offscreenCanvas.getContext('webgl');
+ var dstCanvas = ctx.canvas;
+ assert_equals(dstCanvas.width, 1);
+ assert_equals(dstCanvas.height, 2);
+}, "Test that webglcontext.canvas should return the original OffscreenCanvas");
+
+test(function() {
+ var offscreenCanvas = new OffscreenCanvas(10, 10);
+ var ctx = offscreenCanvas.getContext('2d', {alpha: false});
+ ctx.fillStyle = 'rgba(0, 255, 0, 0.5)';
+ ctx.fillRect(0, 0, 10, 10);
+ _assertPixelApprox(offscreenCanvas, 5,5, 0,127,0,255, 2);
+}, "Test that OffscreenCanvasRenderingContext2D with alpha disabled makes the OffscreenCanvas opaque");
+
+test(function() {
+ var offscreenCanvas = new OffscreenCanvas(10, 10);
+ var ctx = offscreenCanvas.getContext('2d', {alpha: true});
+ ctx.fillStyle = 'rgba(0, 255, 0, 0.5)';
+ ctx.fillRect(0, 0, 10, 10);
+ _assertPixelApprox(offscreenCanvas, 5,5, 0,255,0,127, 2);
+}, "Test that OffscreenCanvasRenderingContext2D with alpha enabled preserves the alpha");
+
+test(function() {
+ var offscreenCanvas = new OffscreenCanvas(10, 10);
+ var ctx = offscreenCanvas.getContext('2d');
+ ctx.fillStyle = 'rgba(0, 255, 0, 0.5)';
+ ctx.fillRect(0, 0, 10, 10);
+ _assertPixelApprox(offscreenCanvas, 5,5, 0,255,0,127, 2);
+}, "Test that 'alpha' context creation attribute is true by default");
+
+</script>
+
diff --git a/testing/web-platform/tests/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.getcontext.worker.js b/testing/web-platform/tests/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.getcontext.worker.js
new file mode 100644
index 0000000000..c413791f61
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.getcontext.worker.js
@@ -0,0 +1,77 @@
+// spec link: https://html.spec.whatwg.org/#dom-offscreencanvas-getcontext
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+test(function() {
+ var offscreenCanvas = new OffscreenCanvas(1, 1);
+ assert_throws_js(TypeError, function() { offscreenCanvas.getContext('3d'); });
+}, "Test that getContext with un-supported string throws a TypeError.");
+
+test(function() {
+ var offscreenCanvas1 = new OffscreenCanvas(1, 1);
+ var ctx1 = offscreenCanvas1.getContext('2d');
+ assert_true(ctx1 instanceof OffscreenCanvasRenderingContext2D);
+
+ var offscreenCanvas2 = new OffscreenCanvas(1, 1);
+ var ctx2 = offscreenCanvas2.getContext('webgl');
+ assert_true(ctx2 instanceof WebGLRenderingContext);
+
+ var offscreenCanvas3 = new OffscreenCanvas(1, 1);
+ var ctx3 = offscreenCanvas3.getContext('webgl2');
+ assert_true(ctx3 instanceof WebGL2RenderingContext);
+}, "Test that getContext with supported string returns correct results");
+
+test(function() {
+ var offscreenCanvas1 = new OffscreenCanvas(1, 1);
+ var ctx1 = offscreenCanvas1.getContext('2d');
+ var ctx2 = offscreenCanvas1.getContext('webgl');
+ assert_equals(ctx2, null);
+
+ var offscreenCanvas2 = new OffscreenCanvas(1, 1);
+ var ctx3 = offscreenCanvas2.getContext('webgl');
+ var ctx4 = offscreenCanvas2.getContext('2d');
+ assert_equals(ctx4, null);
+}, "Test that getContext twice with different context type returns null the second time");
+
+test(function() {
+ var offscreenCanvas = new OffscreenCanvas(1, 2);
+ var ctx = offscreenCanvas.getContext('2d');
+ var dstCanvas = ctx.canvas;
+ assert_equals(dstCanvas.width, 1);
+ assert_equals(dstCanvas.height, 2);
+}, "Test that 2dcontext.canvas should return the original OffscreenCanvas");
+
+test(function() {
+ var offscreenCanvas = new OffscreenCanvas(1, 2);
+ var ctx = offscreenCanvas.getContext('webgl');
+ var dstCanvas = ctx.canvas;
+ assert_equals(dstCanvas.width, 1);
+ assert_equals(dstCanvas.height, 2);
+}, "Test that webglcontext.canvas should return the original OffscreenCanvas");
+
+test(function() {
+ var offscreenCanvas = new OffscreenCanvas(10, 10);
+ var ctx = offscreenCanvas.getContext('2d', {alpha: false});
+ ctx.fillStyle = 'rgba(0, 255, 0, 0.5)';
+ ctx.fillRect(0, 0, 10, 10);
+ _assertPixelApprox(offscreenCanvas, 5,5, 0,127,0,255, 2);
+}, "Test that OffscreenCanvasRenderingContext2D with alpha disabled makes the OffscreenCanvas opaque");
+
+test(function() {
+ var offscreenCanvas = new OffscreenCanvas(10, 10);
+ var ctx = offscreenCanvas.getContext('2d', {alpha: true});
+ ctx.fillStyle = 'rgba(0, 255, 0, 0.5)';
+ ctx.fillRect(0, 0, 10, 10);
+ _assertPixelApprox(offscreenCanvas, 5,5, 0,255,0,127, 2);
+}, "Test that OffscreenCanvasRenderingContext2D with alpha enabled preserves the alpha");
+
+test(function() {
+ var offscreenCanvas = new OffscreenCanvas(10, 10);
+ var ctx = offscreenCanvas.getContext('2d');
+ ctx.fillStyle = 'rgba(0, 255, 0, 0.5)';
+ ctx.fillRect(0, 0, 10, 10);
+ _assertPixelApprox(offscreenCanvas, 5,5, 0,255,0,127, 2);
+}, "Test that 'alpha' context creation attribute is true by default");
+
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.resize.html b/testing/web-platform/tests/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.resize.html
new file mode 100644
index 0000000000..e259f79ca2
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.resize.html
@@ -0,0 +1,236 @@
+<!DOCTYPE html>
+<title>Test resizing an OffscreenCanvas with a 2d context</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+<body></body>
+<script>
+test(function() {
+ var canvas = new OffscreenCanvas(10, 20);
+ canvas.width = 30;
+ canvas.height = 40;
+ assert_equals(canvas.width, 30);
+ assert_equals(canvas.height, 40);
+}, "Verify that writing to the width and height attributes of an OffscreenCanvas works when there is no context attached.");
+
+test(function() {
+ var canvas = new OffscreenCanvas(10, 20);
+ canvas.getContext('2d');
+ canvas.width = 30;
+ canvas.height = 40;
+ assert_equals(canvas.width, 30);
+ assert_equals(canvas.height, 40);
+ var image = canvas.transferToImageBitmap();
+ assert_equals(image.width, 30);
+ assert_equals(image.height, 40);
+}, "Verify that writing to the width and height attributes of an OffscreenCanvas works when there is a 2d context attached.");
+
+test(function() {
+ var canvas = new OffscreenCanvas(10, 20);
+ canvas.getContext('webgl');
+ canvas.width = 30;
+ canvas.height = 40;
+ assert_equals(canvas.width, 30);
+ assert_equals(canvas.height, 40);
+ var image = canvas.transferToImageBitmap();
+ assert_equals(image.width, 30);
+ assert_equals(image.height, 40);
+}, "Verify that writing to the width and height attributes of an OffscreenCanvas works when there is a webgl context attached.");
+
+test(function() {
+ var placeholder = document.createElement('canvas');
+ placeholder.width = 2;
+ placeholder.height = 2;
+ var offscreen = placeholder.transferControlToOffscreen();
+ assert_throws_dom("InvalidStateError", () => { placeholder.width = 1; });
+ assert_throws_dom("InvalidStateError", () => { placeholder.height = 1; });
+}, "Verify that writing to the width or height attribute of a placeholder canvas throws an exception");
+
+test(function() {
+ var placeholder = document.createElement('canvas');
+ placeholder.width = 1;
+ placeholder.height = 1;
+ var offscreen = placeholder.transferControlToOffscreen();
+ assert_throws_dom("InvalidStateError", () => { placeholder.width = 1; });
+ assert_throws_dom("InvalidStateError", () => { placeholder.height = 1; });
+}, "Verify that writing to the width or height attribute of a placeholder canvas throws an exception even when not changing the value of the attribute.");
+
+test(function() {
+ var canvas = new OffscreenCanvas(10, 20);
+ var ctx = canvas.getContext('2d');
+ ctx.lineWidth = 5;
+ canvas.width = 30;
+ assert_equals(ctx.lineWidth, 1);
+ ctx.lineWidth = 5;
+ canvas.height = 40;
+ assert_equals(ctx.lineWidth, 1);
+}, "Verify that resizing a 2d context resets its state.");
+
+test(function() {
+ var canvas = new OffscreenCanvas(10, 20);
+ var ctx = canvas.getContext('2d');
+ ctx.lineWidth = 5;
+ canvas.width = canvas.width;
+ assert_equals(ctx.lineWidth, 1);
+ ctx.lineWidth = 5;
+ canvas.height = canvas.height;
+ assert_equals(ctx.lineWidth, 1);
+}, "Verify that setting the size of a 2d context to the same size it already had resets its state.");
+
+async_test(function(t) {
+ var placeholder = document.createElement('canvas');
+ document.body.appendChild(placeholder); // So that we can check computed style/
+ placeholder.width = 10;
+ placeholder.height = 20;
+ var offscreen = placeholder.transferControlToOffscreen();
+ var ctx = offscreen.getContext('2d');
+ t.step(function() {
+ // Verify that setting the size of an OffscreenCanvas that has a placeholder works.
+ offscreen.width = 30;
+ offscreen.height = 40;
+ assert_equals(offscreen.width, 30);
+ assert_equals(offscreen.height, 40);
+ var image = offscreen.transferToImageBitmap();
+ assert_equals(image.width, 30);
+ assert_equals(image.height, 40);
+ });
+ t.step(function() {
+ // Verify that setting the size of an OffscreenCanvas does not directly update the size of its placeholder canvas.
+ assert_equals(placeholder.width, 10);
+ assert_equals(placeholder.height, 20);
+ });
+ var asyncStepsCompleted = 0;
+ createImageBitmap(placeholder).then(image => {
+ t.step(function() {
+ // Verify that the placeholder was not updated synchronously.
+ assert_equals(image.width, 10);
+ assert_equals(image.height, 20);
+ });
+ asyncStepsCompleted = asyncStepsCompleted + 1;
+ if (asyncStepsCompleted == 2) {
+ t.done();
+ }
+ });
+ // We wait for up to 3 frames before checking the information has propagated.
+ requestAnimationFrame(() => {
+ requestAnimationFrame(() => {
+ requestAnimationFrame(() => {
+ t.step(function() {
+ // Verify that updates the size of its placeholder canvas.
+ assert_equals(placeholder.width, 30);
+ assert_equals(placeholder.height, 40);
+ var computedStyle = window.getComputedStyle(placeholder);
+ assert_equals(computedStyle.getPropertyValue('width'), "30px");
+ assert_equals(computedStyle.getPropertyValue('height'), "40px");
+ });
+ createImageBitmap(placeholder).then(image => {
+ t.step(function() {
+ // Verify that an image grabbed from the placeholder has the correct dimensions
+ assert_equals(image.width, 30);
+ assert_equals(image.height, 40);
+ });
+ asyncStepsCompleted = asyncStepsCompleted + 1;
+ if (asyncStepsCompleted == 2) {
+ t.done();
+ }
+ });
+ });
+ });
+ });
+}, "Verify that resizing an OffscreenCanvas with a 2d context propagates the new size to its placeholder canvas asynchronously.");
+
+async_test(function(t) {
+ var placeholder = document.createElement('canvas');
+ document.body.appendChild(placeholder); // So that we can check computed style/
+ placeholder.width = 10;
+ placeholder.height = 20;
+ var offscreen = placeholder.transferControlToOffscreen();
+ var ctx = offscreen.getContext('webgl');
+ t.step(function() {
+ // Verify that setting the size of an OffscreenCanvas that has a placeholder works.
+ offscreen.width = 30;
+ offscreen.height = 40;
+ assert_equals(offscreen.width, 30);
+ assert_equals(offscreen.height, 40);
+ var image = offscreen.transferToImageBitmap();
+ assert_equals(image.width, 30);
+ assert_equals(image.height, 40);
+ });
+ t.step(function() {
+ // Verify that setting the size of an OffscreenCanvas does not directly update the size of its placeholder canvas.
+ assert_equals(placeholder.width, 10);
+ assert_equals(placeholder.height, 20);
+ });
+ var asyncStepsCompleted = 0;
+ createImageBitmap(placeholder).then(image => {
+ t.step(function() {
+ // Verify that the placeholder was not updated synchronously.
+ assert_equals(image.width, 10);
+ assert_equals(image.height, 20);
+ });
+ asyncStepsCompleted = asyncStepsCompleted + 1;
+ if (asyncStepsCompleted == 2) {
+ t.done();
+ }
+ });
+ // We wait for up to 3 frames before checking the information has propagated.
+ requestAnimationFrame(() => {
+ requestAnimationFrame(() => {
+ requestAnimationFrame(() => {
+ t.step(function() {
+ // Verify that updates the size of its placeholder canvas.
+ assert_equals(placeholder.width, 30);
+ assert_equals(placeholder.height, 40);
+ var computedStyle = window.getComputedStyle(placeholder);
+ assert_equals(computedStyle.getPropertyValue('width'), "30px");
+ assert_equals(computedStyle.getPropertyValue('height'), "40px");
+ });
+ createImageBitmap(placeholder).then(image => {
+ t.step(function() {
+ // Verify that an image grabbed from the placeholder has the correct dimensions
+ assert_equals(image.width, 30);
+ assert_equals(image.height, 40);
+ });
+ asyncStepsCompleted = asyncStepsCompleted + 1;
+ if (asyncStepsCompleted == 2) {
+ t.done();
+ }
+ });
+ });
+ });
+ });
+}, "Verify that resizing an OffscreenCanvas with a webgl context propagates the new size to its placeholder canvas asynchronously.");
+
+async_test(function(t){
+ var placeholder = document.createElement('canvas');
+ placeholder.width = 1;
+ placeholder.height = 1;
+ var offscreen = placeholder.transferControlToOffscreen();
+ var ctx = offscreen.getContext('2d');
+ offscreen.width = offscreen.height = 10;
+ ctx.fillStyle = '#0f0';
+ ctx.fillRect(0, 0, 10, 10);
+ // We wait for up to 3 frames before checking the information has propagated.
+ requestAnimationFrame(() => {
+ requestAnimationFrame(() => {
+ requestAnimationFrame(() => {
+ var testCanvas = document.createElement('canvas');
+ testCanvas.width = testCanvas.height = 20;
+ testCtx = testCanvas.getContext('2d');
+ testCtx.drawImage(placeholder, 0, 0);
+ var pixel1 = testCtx.getImageData(9, 9, 1, 1).data;
+ var pixel2 = testCtx.getImageData(9, 10, 1, 1).data;
+ var pixel3 = testCtx.getImageData(10, 9, 1, 1).data;
+ t.step(function() {
+ assert_equals(placeholder.width, 10);
+ assert_equals(placeholder.height, 10);
+ assert_array_equals(pixel1, [0, 255, 0, 255]);
+ assert_array_equals(pixel2, [0, 0, 0, 0]);
+ assert_array_equals(pixel3, [0, 0, 0, 0]);
+ });
+ t.done();
+ });
+ });
+ });
+}, "Verify that drawImage uses the size of the frame as the intinsic size of a placeholder canvas.");
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.transfer.lowlatency.nocrash.html b/testing/web-platform/tests/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.transfer.lowlatency.nocrash.html
new file mode 100644
index 0000000000..1960841564
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.transfer.lowlatency.nocrash.html
@@ -0,0 +1,12 @@
+<title>Transfer Low-Latency Canvas</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+<body></body>
+
+<script>
+test(function(t) {
+ var ctx = document.createElement("canvas").getContext('2d', {desynchronized:true});
+ assert_throws_dom("InvalidStateError", () => { ctx.canvas.transferControlToOffscreen(); });
+}, "Tests that transferring a low latency canvas does not cause a crash. See crbug.com/1255153");
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.transfer.to.imagebitmap.html b/testing/web-platform/tests/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.transfer.to.imagebitmap.html
new file mode 100644
index 0000000000..6e1adf9591
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.transfer.to.imagebitmap.html
@@ -0,0 +1,112 @@
+<!DOCTYPE html>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+<link rel="help" href="https://html.spec.whatwg.org/#dom-offscreencanvas-transfertoimagebitmap">
+
+<script id="myWorker" type="text/worker">
+
+self.onmessage = function(e) {
+};
+
+</script>
+
+<script>
+function makeWorker(script)
+{
+ var blob = new Blob([script]);
+ return new Worker(URL.createObjectURL(blob));
+}
+
+test(function() {
+ function testSize(contextType) {
+ var offscreenCanvas = new OffscreenCanvas(100, 50);
+ var ctx = offscreenCanvas.getContext(contextType);
+ var image = offscreenCanvas.transferToImageBitmap();
+ assert_equals(image.width, 100);
+ assert_equals(image.height, 50);
+ }
+
+ testSize('2d');
+ testSize('webgl');
+}, "Test that transferToImageBitmap returns an ImageBitmap with correct width and height");
+
+test(function() {
+ function testImageBitmapClr(shouldCallTwice, alphaVal) {
+ var offscreenCanvas = new OffscreenCanvas(100, 50);
+ var ctx = offscreenCanvas.getContext('2d', {alpha: alphaVal});
+ ctx.fillStyle = "#0f0";
+ ctx.fillRect(0, 0, 100, 50);
+ var image = offscreenCanvas.transferToImageBitmap();
+
+ if (shouldCallTwice)
+ image = offscreenCanvas.transferToImageBitmap();
+
+ var drawCanvas = document.createElement('canvas');
+ drawCanvas.width = 100;
+ drawCanvas.height = 50;
+ var dCtx = drawCanvas.getContext('2d');
+ dCtx.drawImage(image, 0, 0);
+
+ if (shouldCallTwice) {
+ if (alphaVal)
+ _assertPixel(drawCanvas, 50,25, 0,0,0,0);
+ else
+ _assertPixel(drawCanvas, 50,25, 0,0,0,255);
+ } else {
+ _assertPixel(drawCanvas, 50,25, 0,255,0,255);
+ }
+ }
+
+ testImageBitmapClr(false, true);
+ testImageBitmapClr(true, true);
+ testImageBitmapClr(true, false);
+}, "Test that transferToImageBitmap returns an ImageBitmap with correct color");
+
+test(function() {
+ var offscreenCanvas = new OffscreenCanvas(100, 50);
+ var ctx = offscreenCanvas.getContext('2d');
+ ctx.lineWidth = 10;
+ var image = offscreenCanvas.transferToImageBitmap();
+ assert_equals(ctx.lineWidth, 10);
+}, "Test that transferToImageBitmap won't change context's property");
+
+test(function() {
+ var offscreenCanvas = new OffscreenCanvas(100, 50);
+ var ctx = offscreenCanvas.getContext('2d');
+ ctx.rect(0, 0, 25, 50);
+ ctx.clip();
+ ctx.translate(20, 20);
+
+ ctx.fillStyle = '#0f0';
+ var image1 = offscreenCanvas.transferToImageBitmap();
+ // trasnform should be preserved
+ ctx.fillRect(0, 0, 10, 10);
+ var image2 = offscreenCanvas.transferToImageBitmap();
+
+ var drawCanvas = document.createElement('canvas');
+ drawCanvas.width = 100;
+ drawCanvas.height = 50;
+ var dCtx = drawCanvas.getContext('2d');
+ dCtx.drawImage(image2, 0, 0);
+ // Verify that transform was carried over.
+ _assertPixel(drawCanvas, 23,25, 0,255,0,255);
+ // Verify that clip was carried over.
+ _assertPixel(drawCanvas, 27,25, 0,0,0,0);
+}, "Test that transferToImageBitmap preserves transform");
+
+async_test(function(t) {
+ var worker = makeWorker(document.getElementById("myWorker").textContent);
+ var offscreenCanvas = new OffscreenCanvas(10, 10);
+ worker.postMessage(offscreenCanvas, [offscreenCanvas]);
+ assert_throws_dom("InvalidStateError", function() { offscreenCanvas.transferToImageBitmap(); });
+ t.done();
+}, "Test that call transferToImageBitmap on a detached OffscreenCanvas throws an exception");
+
+test(function() {
+ var offscreenCanvas = new OffscreenCanvas(10, 10);
+ assert_throws_dom("InvalidStateError", function() { offscreenCanvas.transferToImageBitmap(); });
+}, "Test that transferToImageBitmap without a context throws an exception");
+
+</script>
+
diff --git a/testing/web-platform/tests/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.transfer.to.imagebitmap.nocrash.html b/testing/web-platform/tests/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.transfer.to.imagebitmap.nocrash.html
new file mode 100644
index 0000000000..09a388ed35
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.transfer.to.imagebitmap.nocrash.html
@@ -0,0 +1,16 @@
+<!DOCTYPE html>
+<body>
+ <p>Tests that an ImageBitmap in Offscreen without content does not crash.</p>
+
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script>
+
+async_test(function(t) {
+ var v1 = document.createElement("canvas");
+ var v2 = v1.transferControlToOffscreen();
+ var v3 = v2.getContext("bitmaprenderer");
+ v2.width = 67;
+ t.done();
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.transfer.to.imagebitmap.w.html b/testing/web-platform/tests/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.transfer.to.imagebitmap.w.html
new file mode 100644
index 0000000000..b51ce0efa2
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.transfer.to.imagebitmap.w.html
@@ -0,0 +1,201 @@
+<!DOCTYPE html>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+<link rel="help" href="https://html.spec.whatwg.org/#dom-offscreencanvas-transfertoimagebitmap">
+
+<script id="myWorker" type="text/worker">
+
+function testSize(contextType)
+{
+ var offscreenCanvas = new OffscreenCanvas(100, 50);
+ var ctx = offscreenCanvas.getContext(contextType);
+ var image = offscreenCanvas.transferToImageBitmap();
+ if (image.width == 100 && image.height == 50)
+ return true;
+ return false;
+}
+
+function testImageBitmapClr(shouldCallTwice, alphaVal) {
+ var offscreenCanvas = new OffscreenCanvas(100, 50);
+ var ctx = offscreenCanvas.getContext('2d', {alpha: alphaVal});
+ ctx.fillStyle = "#0f0";
+ ctx.fillRect(0, 0, 100, 50);
+ var image = offscreenCanvas.transferToImageBitmap();
+
+ if (shouldCallTwice)
+ image = offscreenCanvas.transferToImageBitmap();
+ return image;
+}
+
+function isInvalidStateError(funcStr, offscreenCanvas)
+{
+ try {
+ eval(funcStr);
+ } catch (e) {
+ if (e instanceof DOMException && e.name == "InvalidStateError")
+ return true;
+ return false;
+ }
+}
+
+function testImageBitmapSize()
+{
+ return testSize('2d') && testSize('webgl');
+}
+
+function testLineWidthNotAltered()
+{
+ var offscreenCanvas = new OffscreenCanvas(100, 50);
+ var ctx = offscreenCanvas.getContext('2d');
+ ctx.lineWidth = 10;
+ var image = offscreenCanvas.transferToImageBitmap();
+ return ctx.lineWidth == 10;
+}
+
+function testTransformPreserved()
+{
+ var offscreenCanvas = new OffscreenCanvas(100, 50);
+ var ctx = offscreenCanvas.getContext('2d');
+ ctx.rect(0, 0, 25, 50);
+ ctx.clip();
+ ctx.translate(20, 20);
+
+ ctx.fillStyle = '#0f0';
+ var image1 = offscreenCanvas.transferToImageBitmap();
+ // trasnform should be preserved
+ ctx.fillRect(0, 0, 10, 10);
+ var image2 = offscreenCanvas.transferToImageBitmap();
+ return image2;
+}
+
+function testException()
+{
+ var offscreenCanvas = new OffscreenCanvas(10, 10);
+ return isInvalidStateError("offscreenCanvas.transferToImageBitmap()", offscreenCanvas);
+}
+
+self.onmessage = function(e) {
+ switch (e.data) {
+ case 'test1':
+ self.postMessage(testImageBitmapSize());
+ break;
+ case 'test2':
+ self.postMessage(testImageBitmapClr(false, true));
+ break;
+ case 'test3':
+ self.postMessage(testImageBitmapClr(true, true));
+ break;
+ case 'test4':
+ self.postMessage(testImageBitmapClr(true, false));
+ break;
+ case 'test5':
+ self.postMessage(testLineWidthNotAltered());
+ break;
+ case 'test6':
+ self.postMessage(testTransformPreserved());
+ break;
+ case 'test7':
+ var offscreenCanvas = new OffscreenCanvas(10, 10);
+ self.postMessage({offscreenCanvas: offscreenCanvas}, [offscreenCanvas]);
+ self.postMessage(isInvalidStateError("offscreenCanvas.transferToImageBitmap()", offscreenCanvas));
+ break;
+ case 'test8':
+ self.postMessage(testException());
+ break;
+ }
+};
+
+</script>
+
+<script>
+function makeWorker(test) {
+ var blob = new Blob([document.getElementById("myWorker").textContent]);
+ var worker = new Worker(URL.createObjectURL(blob));
+ worker.onerror = test.unreached_func("error");
+ return worker;
+}
+
+function drawImageBitmap(image, x, y)
+{
+ var drawCanvas = document.createElement('canvas');
+ drawCanvas.width = 100;
+ drawCanvas.height = 50;
+ var dCtx = drawCanvas.getContext('2d');
+ dCtx.drawImage(image, 0, 0);
+ return dCtx.getImageData(x, y, 1, 1).data;
+}
+
+async_test(function(t) {
+ var worker = makeWorker(t);
+ worker.addEventListener('message', t.step_func_done(function(msg) {
+ assert_true(msg.data);
+ }));
+ worker.postMessage('test1');
+}, "Test that transferToImageBitmap returns an ImageBitmap with correct width and height in a worker");
+
+async_test(function(t) {
+ var worker = makeWorker(t);
+ worker.addEventListener('message', t.step_func_done(function(msg) {
+ var clr = drawImageBitmap(msg.data, 50, 25);
+ assert_array_equals(clr, [0, 255, 0, 255]);
+ }));
+ worker.postMessage('test2');
+}, "Test that transferToImageBitmap returns an ImageBitmap with correct color in a worker");
+
+async_test(function(t) {
+ var worker = makeWorker(t);
+ worker.addEventListener('message', t.step_func_done(function(msg) {
+ var clr = drawImageBitmap(msg.data, 50, 25);
+ assert_array_equals(clr, [0, 0, 0, 0]);
+ }));
+ worker.postMessage('test3');
+}, "Test that call transferToImageBitmap twice returns an ImageBitmap with correct color in a worker");
+
+async_test(function(t) {
+ var worker = makeWorker(t);
+ worker.addEventListener('message', t.step_func_done(function(msg) {
+ var clr = drawImageBitmap(msg.data, 50, 25);
+ assert_array_equals(clr, [0, 0, 0, 255]);
+ }));
+ worker.postMessage('test4');
+}, "Test that call transferToImageBitmap twice on a alpha-disabled context returns an ImageBitmap with correct color in a worker");
+
+async_test(function(t) {
+ var worker = makeWorker(t);
+ worker.addEventListener('message', t.step_func_done(function(msg) {
+ assert_true(msg.data);
+ }));
+ worker.postMessage('test5');
+}, "Test that transferToImageBitmap won't change context's property in a worker");
+
+async_test(function(t) {
+ var worker = makeWorker(t);
+ worker.addEventListener('message', t.step_func_done(function(msg) {
+ var clr1 = drawImageBitmap(msg.data, 23, 25);
+ assert_array_equals(clr1, [0, 255, 0, 255]);
+ var clr2 = drawImageBitmap(msg.data, 27, 25);
+ assert_array_equals(clr2, [0, 0, 0, 0]);
+ }));
+ worker.postMessage('test6');
+}, "Test that call transferToImageBitmap preserves transform in a worker");
+
+async_test(function(t) {
+ var worker = makeWorker(t);
+ worker.addEventListener('message', t.step_func_done(function(msg) {
+ if (msg.data == true || msg.data == false)
+ assert_true(msg.data);
+ }));
+ worker.postMessage('test7');
+}, "Test that call transferToImageBitmap on a detached OffscreenCanvas throws an exception in a worker");
+
+async_test(function(t) {
+ var worker = makeWorker(t);
+ worker.addEventListener('message', t.step_func_done(function(msg) {
+ assert_true(msg.data);
+ }));
+ worker.postMessage('test8');
+}, "Test that call transferToImageBitmap without a context throws an exception in a worker");
+
+</script>
+
diff --git a/testing/web-platform/tests/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.transfercontrol.to.offscreen.html b/testing/web-platform/tests/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.transfercontrol.to.offscreen.html
new file mode 100644
index 0000000000..fea375b2ad
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.transfercontrol.to.offscreen.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+<link rel="help" href="https://html.spec.whatwg.org/#dom-canvas-transfercontroltooffscreen">
+<script>
+
+test(function() {
+ var placeholder = document.createElement('canvas');
+ placeholder.width = 100;
+ placeholder.height = 50;
+ var offscreenCanvas = placeholder.transferControlToOffscreen();
+ assert_equals(offscreenCanvas.width, 100);
+ assert_equals(offscreenCanvas.height, 50);
+}, "Test that an OffscreenCanvas generated by transferControlToOffscreen gets correct width and height");
+
+test(function() {
+ var placeholder = document.createElement('canvas');
+ placeholder.width = 100;
+ placeholder.height = 50;
+ var offscreenCanvas = placeholder.transferControlToOffscreen();
+ assert_throws_dom("InvalidStateError", function() { placeholder.getContext('2d'); });
+}, "Test that calling getContext on a placeholder canvas that has already transferred its control throws an exception");
+
+test(function() {
+ var placeholder = document.createElement('canvas');
+ placeholder.width = 100;
+ placeholder.height = 50;
+ var offscreenCanvas = placeholder.transferControlToOffscreen();
+ assert_throws_dom("InvalidStateError", function() { placeholder.transferControlToOffscreen(); });
+}, "Test that calling transferControlToOffscreen twice throws an exception");
+
+</script>
+
diff --git a/testing/web-platform/tests/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.transfercontrol.to.offscreen.w.html b/testing/web-platform/tests/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.transfercontrol.to.offscreen.w.html
new file mode 100644
index 0000000000..1347e7b50b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.transfercontrol.to.offscreen.w.html
@@ -0,0 +1,76 @@
+<!DOCTYPE html>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+<link rel="help" href="https://html.spec.whatwg.org/#dom-canvas-transfercontroltooffscreen">
+
+<script id="myWorker" type="text/worker">
+
+function testSize(offscreenCanvas)
+{
+ if (offscreenCanvas.width == 100 && offscreenCanvas.height == 50)
+ return true;
+ return false;
+}
+
+self.onmessage = function(e) {
+ switch (e.data.msg) {
+ case 'test1':
+ self.postMessage(testSize(e.data.data));
+ break;
+ case 'test2':
+ self.postMessage("");
+ break;
+ case 'test3':
+ self.postMessage("");
+ break;
+ }
+};
+
+</script>
+
+<script>
+function makeWorker(script)
+{
+ var blob = new Blob([script]);
+ return new Worker(URL.createObjectURL(blob));
+}
+
+async_test(function(t) {
+ var placeholder = document.createElement('canvas');
+ placeholder.width = 100;
+ placeholder.height = 50;
+ var offscreenCanvas = placeholder.transferControlToOffscreen();
+ var worker = makeWorker(document.getElementById("myWorker").textContent);
+ worker.addEventListener('message', t.step_func_done(function(msg) {
+ assert_true(msg.data);
+ }));
+ worker.postMessage({msg: 'test1', data: offscreenCanvas}, [offscreenCanvas]);
+}, "Test that an OffscreenCanvas generated by transferControlToOffscreen gets correct width and height when it is transferred to a worker");
+
+async_test(function(t) {
+ var placeholder = document.createElement('canvas');
+ placeholder.width = 100;
+ placeholder.height = 50;
+ var offscreenCanvas = placeholder.transferControlToOffscreen();
+ var worker = makeWorker(document.getElementById("myWorker").textContent);
+ worker.addEventListener('message', t.step_func_done(function(msg) {
+ assert_throws_dom("InvalidStateError", function() { placeholder.getContext('2d'); });
+ }));
+ worker.postMessage({msg: 'test2', data: offscreenCanvas}, [offscreenCanvas]);
+}, "Test that calling getContext on a placeholder canvas that is transferred its control to an OffscreenCanvas throws an exception, when the OffscreenCanvas is transferred to a worker");
+
+async_test(function(t) {
+ var placeholder = document.createElement('canvas');
+ placeholder.width = 100;
+ placeholder.height = 50;
+ var offscreenCanvas = placeholder.transferControlToOffscreen();
+ var worker = makeWorker(document.getElementById("myWorker").textContent);
+ worker.addEventListener('message', t.step_func_done(function(msg) {
+ assert_throws_dom("InvalidStateError", function() { placeholder.transferControlToOffscreen(); });
+ }));
+ worker.postMessage({msg: 'test3', data: offscreenCanvas}, [offscreenCanvas]);
+}, "Test that calling transferControlToOffscreen twice throws an exception, when its associated OffscreenCanvas is transferred to a worker");
+
+</script>
+
diff --git a/testing/web-platform/tests/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.transferrable.html b/testing/web-platform/tests/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.transferrable.html
new file mode 100644
index 0000000000..d321c324fa
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.transferrable.html
@@ -0,0 +1,83 @@
+<!DOCTYPE html>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+<link rel="help" href="https://html.spec.whatwg.org/#offscreencanvas">
+
+<script id="myWorker" type="text/worker">
+
+function test1(offscreenCanvas)
+{
+ return offscreenCanvas.width == 10 && offscreenCanvas.height == 10;
+}
+
+self.onmessage = function(e) {
+ switch(e.data.msg) {
+ case 'test1':
+ self.postMessage(test1(e.data.data));
+ break;
+ }
+};
+
+</script>
+
+<script>
+function makeWorker(script)
+{
+ var blob = new Blob([script]);
+ return new Worker(URL.createObjectURL(blob));
+}
+
+async_test(function(t) {
+ var worker = makeWorker(document.getElementById("myWorker").textContent);
+ var offscreenCanvas = new OffscreenCanvas(10, 10);
+ worker.postMessage({msg: 'test1', data: offscreenCanvas}, [offscreenCanvas]);
+ worker.addEventListener('message', t.step_func_done(function(msg) {
+ assert_true(msg.data);
+ }));
+ assert_equals(offscreenCanvas.width, 0);
+ assert_equals(offscreenCanvas.height, 0);
+}, "Test that offscreenCanvas's size is correct after being transferred to a worker.");
+
+test(function() {
+ function testException(contextType) {
+ var worker = makeWorker(document.getElementById("myWorker").textContent);
+ var offscreenCanvas = new OffscreenCanvas(10, 10);
+ var ctx = offscreenCanvas.getContext(contextType);
+ assert_throws_dom("InvalidStateError", function() {
+ worker.postMessage({offscreenCanvas}, [offscreenCanvas]);
+ });
+ }
+ testException('2d');
+ testException('webgl');
+}, "Test that transfer an OffscreenCanvas that has a context throws exception.");
+
+test(function() {
+ var worker = makeWorker(document.getElementById("myWorker").textContent);
+ var offscreenCanvas = new OffscreenCanvas(10, 10);
+ worker.postMessage({offscreenCanvas}, [offscreenCanvas]);
+ assert_throws_dom("InvalidStateError", function() {
+ worker.postMessage({offscreenCanvas}, [offscreenCanvas]);
+ });
+}, "Test that transfer an OffscreenCanvas twice throws exception.");
+
+test(function() {
+ var worker = makeWorker(document.getElementById("myWorker").textContent);
+ var offscreenCanvas = new OffscreenCanvas(10, 10);
+ worker.postMessage({offscreenCanvas}, [offscreenCanvas]);
+ assert_throws_dom("InvalidStateError", function() {
+ offscreenCanvas.getContext('2d');
+ });
+}, "Test that calling getContext('2d') on a detached OffscreenCanvas throws exception.");
+
+test(function() {
+ var worker = makeWorker(document.getElementById("myWorker").textContent);
+ var offscreenCanvas = new OffscreenCanvas(10, 10);
+ worker.postMessage({offscreenCanvas}, [offscreenCanvas]);
+ assert_throws_dom("InvalidStateError", function() {
+ offscreenCanvas.getContext('webgl');
+ });
+}, "Test that calling getContext('webgl') on a detached OffscreenCanvas throws exception.");
+
+</script>
+
diff --git a/testing/web-platform/tests/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.transferrable.w.html b/testing/web-platform/tests/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.transferrable.w.html
new file mode 100644
index 0000000000..38f981e8f0
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.transferrable.w.html
@@ -0,0 +1,142 @@
+<!DOCTYPE html>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+<link rel="help" href="https://html.spec.whatwg.org/#offscreencanvas">
+
+<script id="myWorker" type="text/worker">
+
+function isInvalidStateError(funcStr, offscreenCanvas)
+{
+ try {
+ eval(funcStr);
+ } catch (e) {
+ if (e instanceof DOMException && e.name == "InvalidStateError")
+ return true;
+ return false;
+ }
+}
+
+function testExceptionWith2DContext()
+{
+ var offscreenCanvas = new OffscreenCanvas(10, 10);
+ var ctx = offscreenCanvas.getContext('2d');
+ return isInvalidStateError("self.postMessage(offscreenCanvas, [offscreenCanvas])", offscreenCanvas);
+}
+
+function testExceptionWithWebGLContext()
+{
+ var offscreenCanvas = new OffscreenCanvas(10, 10);
+ var ctx = offscreenCanvas.getContext('webgl');
+ return isInvalidStateError("self.postMessage(offscreenCanvas, [offscreenCanvas])", offscreenCanvas);
+}
+
+function testExceptionWithDetachedOffscreenCanvas1()
+{
+ var offscreenCanvas = new OffscreenCanvas(10, 10);
+ self.postMessage(offscreenCanvas, [offscreenCanvas]);
+ return isInvalidStateError("self.postMessage(offscreenCanvas, [offscreenCanvas])", offscreenCanvas);
+}
+
+function testExceptionWithDetachedOffscreenCanvas2()
+{
+ var offscreenCanvas = new OffscreenCanvas(10, 10);
+ self.postMessage(offscreenCanvas, [offscreenCanvas]);
+ return isInvalidStateError("offscreenCanvas.getContext('2d')", offscreenCanvas);
+}
+
+function testExceptionWithDetachedOffscreenCanvas3()
+{
+ var offscreenCanvas = new OffscreenCanvas(10, 10);
+ self.postMessage(offscreenCanvas, [offscreenCanvas]);
+ return isInvalidStateError("offscreenCanvas.getContext('webgl')", offscreenCanvas);
+}
+
+self.onmessage = function(e) {
+ switch(e.data) {
+ case 'test1':
+ var offscreenCanvas = new OffscreenCanvas(10, 10);
+ self.postMessage(offscreenCanvas, [offscreenCanvas]);
+ break;
+ case 'test2':
+ self.postMessage(testExceptionWith2DContext());
+ break;
+ case 'test3':
+ self.postMessage(testExceptionWithWebGLContext());
+ break;
+ case 'test4':
+ self.postMessage(testExceptionWithDetachedOffscreenCanvas1());
+ break;
+ case 'test5':
+ self.postMessage(testExceptionWithDetachedOffscreenCanvas2());
+ break;
+ case 'test6':
+ self.postMessage(testExceptionWithDetachedOffscreenCanvas3());
+ break;
+ }
+};
+
+</script>
+
+<script>
+function makeWorker(test) {
+ var blob = new Blob([document.getElementById("myWorker").textContent]);
+ var worker = new Worker(URL.createObjectURL(blob));
+ worker.onerror = test.unreached_func("error");
+ return worker;
+}
+
+async_test(function(t) {
+ var worker = makeWorker(t);
+ worker.addEventListener('message', t.step_func_done(function(msg) {
+ assert_equals(msg.data.width, 10);
+ assert_equals(msg.data.height, 10);
+ }));
+ worker.postMessage('test1');
+}, "Test that OffscreenCanvas's size is correct after being transferred from a worker.");
+
+async_test(function(t) {
+ var worker = makeWorker(t);
+ worker.addEventListener('message', t.step_func_done(function(msg) {
+ assert_true(msg.data);
+ }));
+ worker.postMessage('test2');
+}, "Test that transfer an OffscreenCanvas that has a 2d context throws exception in a worker.");
+
+async_test(function(t) {
+ var worker = makeWorker(t);
+ worker.addEventListener('message', t.step_func_done(function(msg) {
+ assert_true(msg.data);
+ }));
+ worker.postMessage('test3');
+}, "Test that transfer an OffscreenCanvas that has a webgl context throws exception in a worker.");
+
+async_test(function(t) {
+ var worker = makeWorker(t);
+ worker.addEventListener('message', t.step_func_done(function(msg) {
+ if (msg.data == true || msg.data == false)
+ assert_true(msg.data);
+ }));
+ worker.postMessage('test4');
+}, "Test that transfer an OffscreenCanvas twice throws exception in a worker.");
+
+async_test(function(t) {
+ var worker = makeWorker(t);
+ worker.addEventListener('message', t.step_func_done(function(msg) {
+ if (msg.data == true || msg.data == false)
+ assert_true(msg.data);
+ }));
+ worker.postMessage('test5');
+}, "Test that calling getContext('2d') on a detached OffscreenCanvas throws exception in a worker.");
+
+async_test(function(t) {
+ var worker = makeWorker(t);
+ worker.addEventListener('message', t.step_func_done(function(msg) {
+ if (msg.data == true || msg.data == false)
+ assert_true(msg.data);
+ }));
+ worker.postMessage('test6');
+}, "Test that calling getContext('webgl') on a detached OffscreenCanvas throws exception in a worker.");
+
+</script>
+
diff --git a/testing/web-platform/tests/html/canvas/offscreen/manual/transformations/2d.transformation.getTransform.html b/testing/web-platform/tests/html/canvas/offscreen/manual/transformations/2d.transformation.getTransform.html
new file mode 100644
index 0000000000..b3b70ac208
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/manual/transformations/2d.transformation.getTransform.html
@@ -0,0 +1,40 @@
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<body>
+<script>
+// Ensure that context2d.getTransform works
+const epsilon = 1e-5;
+const canvas = new OffscreenCanvas(300, 150);
+const ctx = canvas.getContext('2d');
+
+test(function(t) {
+
+ assert_array_equals(ctx.getTransform().toFloat32Array(),
+ [1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1],
+ "Assert that an untransformed matrix is identity");
+
+ ctx.scale(2, 3);
+ transform = ctx.getTransform();
+ assert_array_equals(ctx.getTransform().toFloat32Array(),
+ [2, 0, 0, 0, 0, 3, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1],
+ "Assert that context2d scaling works");
+
+ ctx.rotate(Math.PI/2);
+ transform = ctx.getTransform();
+ assert_array_approx_equals(ctx.getTransform().toFloat32Array(),
+ [0, 3, 0, 0, -2, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1], epsilon,
+ "Assert that context2d rotate works");
+
+ ctx.translate(1, -1);
+ transform = ctx.getTransform();
+ assert_array_approx_equals(ctx.getTransform().toFloat32Array(),
+ [0, 3, 0, 0, -2, 0, 0, 0, 0, 0, 1, 0, 2, 3, 0, 1], epsilon,
+ "Assert context2d translate works.");
+
+ ctx.resetTransform();
+ assert_array_equals(ctx.getTransform().toFloat32Array(),
+ [1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1],
+ "Assert that a reset matrix is identity");
+}, 'This test ensures that getTransform works correctly.');
+</script>
+</body>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/manual/wide-gamut-canvas/2d.color.space.p3.convertToBlobp3.canvas.html b/testing/web-platform/tests/html/canvas/offscreen/manual/wide-gamut-canvas/2d.color.space.p3.convertToBlobp3.canvas.html
new file mode 100644
index 0000000000..9fc63a9f49
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/manual/wide-gamut-canvas/2d.color.space.p3.convertToBlobp3.canvas.html
@@ -0,0 +1,50 @@
+<!DOCTYPE html>
+<title>OffscreenCanvas test: 2d.color.space.p3.convertToBlob.p3.canvas</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.color.space.p3.convertToBlob.p3.canvas</h1>
+<p class="desc">test if toblob returns p3 data from p3 color space canvas</p>
+
+
+<script>
+var t = async_test("test if toblob returns p3 data from p3 color space canvas");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var offscreenCanvas = new OffscreenCanvas(100, 50);
+var ctx = offscreenCanvas.getContext('2d', {colorSpace: "display-p3"});
+
+ctx.fillStyle = "rgba(155, 27, 27, 1)";
+ctx.fillRect(0, 0, 1, 1);
+ctx.fillStyle = "rgba(27, 155, 27, 0)";
+ctx.fillRect(1, 0, 1, 1);
+ctx.fillStyle = "rgba(27, 27, 155, 0.5)";
+ctx.fillRect(0, 1, 1, 1);
+ctx.fillStyle = "rgba(27, 27, 27, 0.5)";
+ctx.fillRect(1, 1, 1, 1);
+expectedPixels = ctx.getImageData(0, 0, 2, 2, {colorSpace: "display-p3"}).data;
+
+var image = new Image();
+image.onload = t.step_func_done(function() {
+ var dstCanvas = document.createElement("canvas");
+ dstCanvas.width = 2;
+ dstCanvas.height = 2;
+ var ctx = dstCanvas.getContext('2d', {colorSpace: "display-p3"});
+ ctx.drawImage(image, 0, 0);
+ var actualPixels = ctx.getImageData(0, 0, 2, 2, {colorSpace: "display-p3"}).data;
+ assert_array_approx_equals(actualPixels, expectedPixels, 2);
+});
+
+offscreenCanvas.convertToBlob(function(blob) {
+ var urlCreator = window.URL || window.webkitURL;
+ image.src = urlCreator.createObjectURL(blob);
+}, 'image/png', 1);
+t.done()
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.angle.1.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.angle.1.html
new file mode 100644
index 0000000000..cf358e38fc
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.angle.1.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.arc.angle.1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.arc.angle.1</h1>
+<p class="desc">arc() draws pi/2 .. -pi anticlockwise correctly</p>
+
+
+<script>
+var t = async_test("arc() draws pi/2 .. -pi anticlockwise correctly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.beginPath();
+ctx.moveTo(100, 0);
+ctx.arc(100, 0, 150, Math.PI/2, -Math.PI, true);
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.angle.1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.angle.1.worker.js
new file mode 100644
index 0000000000..5a1f54c4c2
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.angle.1.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.arc.angle.1
+// Description:arc() draws pi/2 .. -pi anticlockwise correctly
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("arc() draws pi/2 .. -pi anticlockwise correctly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.beginPath();
+ctx.moveTo(100, 0);
+ctx.arc(100, 0, 150, Math.PI/2, -Math.PI, true);
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.angle.2.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.angle.2.html
new file mode 100644
index 0000000000..9b3983fb37
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.angle.2.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.arc.angle.2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.arc.angle.2</h1>
+<p class="desc">arc() draws -3pi/2 .. -pi anticlockwise correctly</p>
+
+
+<script>
+var t = async_test("arc() draws -3pi/2 .. -pi anticlockwise correctly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.beginPath();
+ctx.moveTo(100, 0);
+ctx.arc(100, 0, 150, -3*Math.PI/2, -Math.PI, true);
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.angle.2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.angle.2.worker.js
new file mode 100644
index 0000000000..15bf295b2d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.angle.2.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.arc.angle.2
+// Description:arc() draws -3pi/2 .. -pi anticlockwise correctly
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("arc() draws -3pi/2 .. -pi anticlockwise correctly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.beginPath();
+ctx.moveTo(100, 0);
+ctx.arc(100, 0, 150, -3*Math.PI/2, -Math.PI, true);
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.angle.3.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.angle.3.html
new file mode 100644
index 0000000000..a757b31efb
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.angle.3.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.arc.angle.3</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.arc.angle.3</h1>
+<p class="desc">arc() wraps angles mod 2pi when anticlockwise and end > start+2pi</p>
+
+
+<script>
+var t = async_test("arc() wraps angles mod 2pi when anticlockwise and end > start+2pi");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.beginPath();
+ctx.moveTo(100, 0);
+ctx.arc(100, 0, 150, (512+1/2)*Math.PI, (1024-1)*Math.PI, true);
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.angle.3.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.angle.3.worker.js
new file mode 100644
index 0000000000..646349fb99
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.angle.3.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.arc.angle.3
+// Description:arc() wraps angles mod 2pi when anticlockwise and end > start+2pi
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("arc() wraps angles mod 2pi when anticlockwise and end > start+2pi");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.beginPath();
+ctx.moveTo(100, 0);
+ctx.arc(100, 0, 150, (512+1/2)*Math.PI, (1024-1)*Math.PI, true);
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.angle.4.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.angle.4.html
new file mode 100644
index 0000000000..b8e4d54027
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.angle.4.html
@@ -0,0 +1,37 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.arc.angle.4</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.arc.angle.4</h1>
+<p class="desc">arc() draws a full circle when clockwise and end > start+2pi</p>
+
+
+<script>
+var t = async_test("arc() draws a full circle when clockwise and end > start+2pi");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.beginPath();
+ctx.moveTo(50, 25);
+ctx.arc(50, 25, 60, (512+1/2)*Math.PI, (1024-1)*Math.PI, false);
+ctx.fill();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.angle.4.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.angle.4.worker.js
new file mode 100644
index 0000000000..8fa2ef137d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.angle.4.worker.js
@@ -0,0 +1,33 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.arc.angle.4
+// Description:arc() draws a full circle when clockwise and end > start+2pi
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("arc() draws a full circle when clockwise and end > start+2pi");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.beginPath();
+ctx.moveTo(50, 25);
+ctx.arc(50, 25, 60, (512+1/2)*Math.PI, (1024-1)*Math.PI, false);
+ctx.fill();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.angle.5.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.angle.5.html
new file mode 100644
index 0000000000..f13a2e41c9
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.angle.5.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.arc.angle.5</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.arc.angle.5</h1>
+<p class="desc">arc() wraps angles mod 2pi when clockwise and start > end+2pi</p>
+
+
+<script>
+var t = async_test("arc() wraps angles mod 2pi when clockwise and start > end+2pi");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.beginPath();
+ctx.moveTo(100, 0);
+ctx.arc(100, 0, 150, (1024-1)*Math.PI, (512+1/2)*Math.PI, false);
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.angle.5.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.angle.5.worker.js
new file mode 100644
index 0000000000..50b23cd9ba
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.angle.5.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.arc.angle.5
+// Description:arc() wraps angles mod 2pi when clockwise and start > end+2pi
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("arc() wraps angles mod 2pi when clockwise and start > end+2pi");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.beginPath();
+ctx.moveTo(100, 0);
+ctx.arc(100, 0, 150, (1024-1)*Math.PI, (512+1/2)*Math.PI, false);
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.angle.6.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.angle.6.html
new file mode 100644
index 0000000000..88184b8d77
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.angle.6.html
@@ -0,0 +1,37 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.arc.angle.6</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.arc.angle.6</h1>
+<p class="desc">arc() draws a full circle when anticlockwise and start > end+2pi</p>
+
+
+<script>
+var t = async_test("arc() draws a full circle when anticlockwise and start > end+2pi");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.beginPath();
+ctx.moveTo(50, 25);
+ctx.arc(50, 25, 60, (1024-1)*Math.PI, (512+1/2)*Math.PI, true);
+ctx.fill();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.angle.6.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.angle.6.worker.js
new file mode 100644
index 0000000000..38bd40489b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.angle.6.worker.js
@@ -0,0 +1,33 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.arc.angle.6
+// Description:arc() draws a full circle when anticlockwise and start > end+2pi
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("arc() draws a full circle when anticlockwise and start > end+2pi");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.beginPath();
+ctx.moveTo(50, 25);
+ctx.arc(50, 25, 60, (1024-1)*Math.PI, (512+1/2)*Math.PI, true);
+ctx.fill();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.default.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.default.html
new file mode 100644
index 0000000000..848f20c32f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.default.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.arc.default</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.arc.default</h1>
+<p class="desc">arc() with missing last argument defaults to clockwise</p>
+
+
+<script>
+var t = async_test("arc() with missing last argument defaults to clockwise");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.beginPath();
+ctx.moveTo(100, 0);
+ctx.arc(100, 0, 150, -Math.PI, Math.PI/2);
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.default.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.default.worker.js
new file mode 100644
index 0000000000..c73829a0ee
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.default.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.arc.default
+// Description:arc() with missing last argument defaults to clockwise
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("arc() with missing last argument defaults to clockwise");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.beginPath();
+ctx.moveTo(100, 0);
+ctx.arc(100, 0, 150, -Math.PI, Math.PI/2);
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.empty.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.empty.html
new file mode 100644
index 0000000000..9098b7fe02
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.empty.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.arc.empty</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.arc.empty</h1>
+<p class="desc">arc() with an empty path does not draw a straight line to the start point</p>
+
+
+<script>
+var t = async_test("arc() with an empty path does not draw a straight line to the start point");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 50;
+ctx.strokeStyle = '#f00';
+ctx.beginPath();
+ctx.arc(200, 25, 5, 0, 2*Math.PI, true);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.empty.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.empty.worker.js
new file mode 100644
index 0000000000..82281ea4b0
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.empty.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.arc.empty
+// Description:arc() with an empty path does not draw a straight line to the start point
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("arc() with an empty path does not draw a straight line to the start point");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 50;
+ctx.strokeStyle = '#f00';
+ctx.beginPath();
+ctx.arc(200, 25, 5, 0, 2*Math.PI, true);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.end.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.end.html
new file mode 100644
index 0000000000..12be27afa6
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.end.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.arc.end</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.arc.end</h1>
+<p class="desc">arc() adds the end point of the arc to the subpath</p>
+
+
+<script>
+var t = async_test("arc() adds the end point of the arc to the subpath");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 50;
+ctx.strokeStyle = '#0f0';
+ctx.beginPath();
+ctx.moveTo(-100, 0);
+ctx.arc(-100, 0, 25, -Math.PI/2, Math.PI/2, true);
+ctx.lineTo(100, 25);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.end.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.end.worker.js
new file mode 100644
index 0000000000..a2519f0bad
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.end.worker.js
@@ -0,0 +1,32 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.arc.end
+// Description:arc() adds the end point of the arc to the subpath
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("arc() adds the end point of the arc to the subpath");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 50;
+ctx.strokeStyle = '#0f0';
+ctx.beginPath();
+ctx.moveTo(-100, 0);
+ctx.arc(-100, 0, 25, -Math.PI/2, Math.PI/2, true);
+ctx.lineTo(100, 25);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.negative.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.negative.html
new file mode 100644
index 0000000000..77f1b07bf5
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.negative.html
@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.arc.negative</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.arc.negative</h1>
+<p class="desc">arc() with negative radius throws INDEX_SIZE_ERR</p>
+
+
+<script>
+var t = async_test("arc() with negative radius throws INDEX_SIZE_ERR");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_dom("INDEX_SIZE_ERR", function() { ctx.arc(0, 0, -1, 0, 0, true); });
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.negative.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.negative.worker.js
new file mode 100644
index 0000000000..c1abffa8e9
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.negative.worker.js
@@ -0,0 +1,23 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.arc.negative
+// Description:arc() with negative radius throws INDEX_SIZE_ERR
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("arc() with negative radius throws INDEX_SIZE_ERR");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_dom("INDEX_SIZE_ERR", function() { ctx.arc(0, 0, -1, 0, 0, true); });
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.nonempty.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.nonempty.html
new file mode 100644
index 0000000000..542940435a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.nonempty.html
@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.arc.nonempty</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.arc.nonempty</h1>
+<p class="desc">arc() with a non-empty path does draw a straight line to the start point</p>
+
+
+<script>
+var t = async_test("arc() with a non-empty path does draw a straight line to the start point");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 50;
+ctx.strokeStyle = '#0f0';
+ctx.beginPath();
+ctx.moveTo(0, 25);
+ctx.arc(200, 25, 5, 0, 2*Math.PI, true);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.nonempty.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.nonempty.worker.js
new file mode 100644
index 0000000000..1d7de77486
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.nonempty.worker.js
@@ -0,0 +1,31 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.arc.nonempty
+// Description:arc() with a non-empty path does draw a straight line to the start point
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("arc() with a non-empty path does draw a straight line to the start point");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 50;
+ctx.strokeStyle = '#0f0';
+ctx.beginPath();
+ctx.moveTo(0, 25);
+ctx.arc(200, 25, 5, 0, 2*Math.PI, true);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.nonfinite.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.nonfinite.html
new file mode 100644
index 0000000000..c65af631b5
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.nonfinite.html
@@ -0,0 +1,77 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.arc.nonfinite</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.arc.nonfinite</h1>
+<p class="desc">arc() with Infinity/NaN is ignored</p>
+
+
+<script>
+var t = async_test("arc() with Infinity/NaN is ignored");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.moveTo(0, 0);
+ctx.lineTo(100, 0);
+ctx.arc(Infinity, 0, 50, 0, 2*Math.PI, true);
+ctx.arc(-Infinity, 0, 50, 0, 2*Math.PI, true);
+ctx.arc(NaN, 0, 50, 0, 2*Math.PI, true);
+ctx.arc(0, Infinity, 50, 0, 2*Math.PI, true);
+ctx.arc(0, -Infinity, 50, 0, 2*Math.PI, true);
+ctx.arc(0, NaN, 50, 0, 2*Math.PI, true);
+ctx.arc(0, 0, Infinity, 0, 2*Math.PI, true);
+ctx.arc(0, 0, -Infinity, 0, 2*Math.PI, true);
+ctx.arc(0, 0, NaN, 0, 2*Math.PI, true);
+ctx.arc(0, 0, 50, Infinity, 2*Math.PI, true);
+ctx.arc(0, 0, 50, -Infinity, 2*Math.PI, true);
+ctx.arc(0, 0, 50, NaN, 2*Math.PI, true);
+ctx.arc(0, 0, 50, 0, Infinity, true);
+ctx.arc(0, 0, 50, 0, -Infinity, true);
+ctx.arc(0, 0, 50, 0, NaN, true);
+ctx.arc(Infinity, Infinity, 50, 0, 2*Math.PI, true);
+ctx.arc(Infinity, Infinity, Infinity, 0, 2*Math.PI, true);
+ctx.arc(Infinity, Infinity, Infinity, Infinity, 2*Math.PI, true);
+ctx.arc(Infinity, Infinity, Infinity, Infinity, Infinity, true);
+ctx.arc(Infinity, Infinity, Infinity, 0, Infinity, true);
+ctx.arc(Infinity, Infinity, 50, Infinity, 2*Math.PI, true);
+ctx.arc(Infinity, Infinity, 50, Infinity, Infinity, true);
+ctx.arc(Infinity, Infinity, 50, 0, Infinity, true);
+ctx.arc(Infinity, 0, Infinity, 0, 2*Math.PI, true);
+ctx.arc(Infinity, 0, Infinity, Infinity, 2*Math.PI, true);
+ctx.arc(Infinity, 0, Infinity, Infinity, Infinity, true);
+ctx.arc(Infinity, 0, Infinity, 0, Infinity, true);
+ctx.arc(Infinity, 0, 50, Infinity, 2*Math.PI, true);
+ctx.arc(Infinity, 0, 50, Infinity, Infinity, true);
+ctx.arc(Infinity, 0, 50, 0, Infinity, true);
+ctx.arc(0, Infinity, Infinity, 0, 2*Math.PI, true);
+ctx.arc(0, Infinity, Infinity, Infinity, 2*Math.PI, true);
+ctx.arc(0, Infinity, Infinity, Infinity, Infinity, true);
+ctx.arc(0, Infinity, Infinity, 0, Infinity, true);
+ctx.arc(0, Infinity, 50, Infinity, 2*Math.PI, true);
+ctx.arc(0, Infinity, 50, Infinity, Infinity, true);
+ctx.arc(0, Infinity, 50, 0, Infinity, true);
+ctx.arc(0, 0, Infinity, Infinity, 2*Math.PI, true);
+ctx.arc(0, 0, Infinity, Infinity, Infinity, true);
+ctx.arc(0, 0, Infinity, 0, Infinity, true);
+ctx.arc(0, 0, 50, Infinity, Infinity, true);
+ctx.lineTo(100, 50);
+ctx.lineTo(0, 50);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 90,45, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.nonfinite.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.nonfinite.worker.js
new file mode 100644
index 0000000000..f83dcf1080
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.nonfinite.worker.js
@@ -0,0 +1,73 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.arc.nonfinite
+// Description:arc() with Infinity/NaN is ignored
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("arc() with Infinity/NaN is ignored");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.moveTo(0, 0);
+ctx.lineTo(100, 0);
+ctx.arc(Infinity, 0, 50, 0, 2*Math.PI, true);
+ctx.arc(-Infinity, 0, 50, 0, 2*Math.PI, true);
+ctx.arc(NaN, 0, 50, 0, 2*Math.PI, true);
+ctx.arc(0, Infinity, 50, 0, 2*Math.PI, true);
+ctx.arc(0, -Infinity, 50, 0, 2*Math.PI, true);
+ctx.arc(0, NaN, 50, 0, 2*Math.PI, true);
+ctx.arc(0, 0, Infinity, 0, 2*Math.PI, true);
+ctx.arc(0, 0, -Infinity, 0, 2*Math.PI, true);
+ctx.arc(0, 0, NaN, 0, 2*Math.PI, true);
+ctx.arc(0, 0, 50, Infinity, 2*Math.PI, true);
+ctx.arc(0, 0, 50, -Infinity, 2*Math.PI, true);
+ctx.arc(0, 0, 50, NaN, 2*Math.PI, true);
+ctx.arc(0, 0, 50, 0, Infinity, true);
+ctx.arc(0, 0, 50, 0, -Infinity, true);
+ctx.arc(0, 0, 50, 0, NaN, true);
+ctx.arc(Infinity, Infinity, 50, 0, 2*Math.PI, true);
+ctx.arc(Infinity, Infinity, Infinity, 0, 2*Math.PI, true);
+ctx.arc(Infinity, Infinity, Infinity, Infinity, 2*Math.PI, true);
+ctx.arc(Infinity, Infinity, Infinity, Infinity, Infinity, true);
+ctx.arc(Infinity, Infinity, Infinity, 0, Infinity, true);
+ctx.arc(Infinity, Infinity, 50, Infinity, 2*Math.PI, true);
+ctx.arc(Infinity, Infinity, 50, Infinity, Infinity, true);
+ctx.arc(Infinity, Infinity, 50, 0, Infinity, true);
+ctx.arc(Infinity, 0, Infinity, 0, 2*Math.PI, true);
+ctx.arc(Infinity, 0, Infinity, Infinity, 2*Math.PI, true);
+ctx.arc(Infinity, 0, Infinity, Infinity, Infinity, true);
+ctx.arc(Infinity, 0, Infinity, 0, Infinity, true);
+ctx.arc(Infinity, 0, 50, Infinity, 2*Math.PI, true);
+ctx.arc(Infinity, 0, 50, Infinity, Infinity, true);
+ctx.arc(Infinity, 0, 50, 0, Infinity, true);
+ctx.arc(0, Infinity, Infinity, 0, 2*Math.PI, true);
+ctx.arc(0, Infinity, Infinity, Infinity, 2*Math.PI, true);
+ctx.arc(0, Infinity, Infinity, Infinity, Infinity, true);
+ctx.arc(0, Infinity, Infinity, 0, Infinity, true);
+ctx.arc(0, Infinity, 50, Infinity, 2*Math.PI, true);
+ctx.arc(0, Infinity, 50, Infinity, Infinity, true);
+ctx.arc(0, Infinity, 50, 0, Infinity, true);
+ctx.arc(0, 0, Infinity, Infinity, 2*Math.PI, true);
+ctx.arc(0, 0, Infinity, Infinity, Infinity, true);
+ctx.arc(0, 0, Infinity, 0, Infinity, true);
+ctx.arc(0, 0, 50, Infinity, Infinity, true);
+ctx.lineTo(100, 50);
+ctx.lineTo(0, 50);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 90,45, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.scale.1.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.scale.1.html
new file mode 100644
index 0000000000..3b0aed390f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.scale.1.html
@@ -0,0 +1,53 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.arc.scale.1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.arc.scale.1</h1>
+<p class="desc">Non-uniformly scaled arcs are the right shape</p>
+
+
+<script>
+var t = async_test("Non-uniformly scaled arcs are the right shape");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.scale(2, 0.5);
+ctx.fillStyle = '#0f0';
+ctx.beginPath();
+ctx.arc(25, 50, 56, 0, 2*Math.PI, false);
+ctx.fill();
+ctx.fillStyle = '#f00';
+ctx.beginPath();
+ctx.moveTo(-25, 50);
+ctx.arc(-25, 50, 24, 0, 2*Math.PI, false);
+ctx.moveTo(75, 50);
+ctx.arc(75, 50, 24, 0, 2*Math.PI, false);
+ctx.moveTo(25, -25);
+ctx.arc(25, -25, 24, 0, 2*Math.PI, false);
+ctx.moveTo(25, 125);
+ctx.arc(25, 125, 24, 0, 2*Math.PI, false);
+ctx.fill();
+_assertPixel(canvas, 0,0, 0,255,0,255);
+_assertPixel(canvas, 50,0, 0,255,0,255);
+_assertPixel(canvas, 99,0, 0,255,0,255);
+_assertPixel(canvas, 0,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 99,25, 0,255,0,255);
+_assertPixel(canvas, 0,49, 0,255,0,255);
+_assertPixel(canvas, 50,49, 0,255,0,255);
+_assertPixel(canvas, 99,49, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.scale.1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.scale.1.worker.js
new file mode 100644
index 0000000000..ec300985c8
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.scale.1.worker.js
@@ -0,0 +1,49 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.arc.scale.1
+// Description:Non-uniformly scaled arcs are the right shape
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Non-uniformly scaled arcs are the right shape");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.scale(2, 0.5);
+ctx.fillStyle = '#0f0';
+ctx.beginPath();
+ctx.arc(25, 50, 56, 0, 2*Math.PI, false);
+ctx.fill();
+ctx.fillStyle = '#f00';
+ctx.beginPath();
+ctx.moveTo(-25, 50);
+ctx.arc(-25, 50, 24, 0, 2*Math.PI, false);
+ctx.moveTo(75, 50);
+ctx.arc(75, 50, 24, 0, 2*Math.PI, false);
+ctx.moveTo(25, -25);
+ctx.arc(25, -25, 24, 0, 2*Math.PI, false);
+ctx.moveTo(25, 125);
+ctx.arc(25, 125, 24, 0, 2*Math.PI, false);
+ctx.fill();
+_assertPixel(canvas, 0,0, 0,255,0,255);
+_assertPixel(canvas, 50,0, 0,255,0,255);
+_assertPixel(canvas, 99,0, 0,255,0,255);
+_assertPixel(canvas, 0,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 99,25, 0,255,0,255);
+_assertPixel(canvas, 0,49, 0,255,0,255);
+_assertPixel(canvas, 50,49, 0,255,0,255);
+_assertPixel(canvas, 99,49, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.scale.2.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.scale.2.html
new file mode 100644
index 0000000000..f6822f8203
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.scale.2.html
@@ -0,0 +1,43 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.arc.scale.2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.arc.scale.2</h1>
+<p class="desc">Highly scaled arcs are the right shape</p>
+
+
+<script>
+var t = async_test("Highly scaled arcs are the right shape");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.scale(100, 100);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 1.2;
+ctx.beginPath();
+ctx.arc(0, 0, 0.6, 0, Math.PI/2, false);
+ctx.stroke();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 50,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 98,25, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 50,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.scale.2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.scale.2.worker.js
new file mode 100644
index 0000000000..d946f7f0fe
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.scale.2.worker.js
@@ -0,0 +1,39 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.arc.scale.2
+// Description:Highly scaled arcs are the right shape
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Highly scaled arcs are the right shape");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.scale(100, 100);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 1.2;
+ctx.beginPath();
+ctx.arc(0, 0, 0.6, 0, Math.PI/2, false);
+ctx.stroke();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 50,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 98,25, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 50,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.selfintersect.1.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.selfintersect.1.html
new file mode 100644
index 0000000000..9e8803a102
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.selfintersect.1.html
@@ -0,0 +1,38 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.arc.selfintersect.1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.arc.selfintersect.1</h1>
+<p class="desc">arc() with lineWidth > 2*radius is drawn sensibly</p>
+
+
+<script>
+var t = async_test("arc() with lineWidth > 2*radius is drawn sensibly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 200;
+ctx.strokeStyle = '#f00';
+ctx.beginPath();
+ctx.arc(100, 50, 25, 0, -Math.PI/2, true);
+ctx.stroke();
+ctx.beginPath();
+ctx.arc(0, 0, 25, 0, -Math.PI/2, true);
+ctx.stroke();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.selfintersect.1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.selfintersect.1.worker.js
new file mode 100644
index 0000000000..84cb983f1a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.selfintersect.1.worker.js
@@ -0,0 +1,34 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.arc.selfintersect.1
+// Description:arc() with lineWidth > 2*radius is drawn sensibly
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("arc() with lineWidth > 2*radius is drawn sensibly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 200;
+ctx.strokeStyle = '#f00';
+ctx.beginPath();
+ctx.arc(100, 50, 25, 0, -Math.PI/2, true);
+ctx.stroke();
+ctx.beginPath();
+ctx.arc(0, 0, 25, 0, -Math.PI/2, true);
+ctx.stroke();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.selfintersect.2.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.selfintersect.2.html
new file mode 100644
index 0000000000..f2118ef29b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.selfintersect.2.html
@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.arc.selfintersect.2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.arc.selfintersect.2</h1>
+<p class="desc">arc() with lineWidth > 2*radius is drawn sensibly</p>
+
+
+<script>
+var t = async_test("arc() with lineWidth > 2*radius is drawn sensibly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 180;
+ctx.strokeStyle = '#0f0';
+ctx.beginPath();
+ctx.arc(-50, 50, 25, 0, -Math.PI/2, true);
+ctx.stroke();
+ctx.beginPath();
+ctx.arc(100, 0, 25, 0, -Math.PI/2, true);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 90,10, 0,255,0,255);
+_assertPixel(canvas, 97,1, 0,255,0,255);
+_assertPixel(canvas, 97,2, 0,255,0,255);
+_assertPixel(canvas, 97,3, 0,255,0,255);
+_assertPixel(canvas, 2,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.selfintersect.2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.selfintersect.2.worker.js
new file mode 100644
index 0000000000..be7f13aee7
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.selfintersect.2.worker.js
@@ -0,0 +1,38 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.arc.selfintersect.2
+// Description:arc() with lineWidth > 2*radius is drawn sensibly
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("arc() with lineWidth > 2*radius is drawn sensibly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 180;
+ctx.strokeStyle = '#0f0';
+ctx.beginPath();
+ctx.arc(-50, 50, 25, 0, -Math.PI/2, true);
+ctx.stroke();
+ctx.beginPath();
+ctx.arc(100, 0, 25, 0, -Math.PI/2, true);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 90,10, 0,255,0,255);
+_assertPixel(canvas, 97,1, 0,255,0,255);
+_assertPixel(canvas, 97,2, 0,255,0,255);
+_assertPixel(canvas, 97,3, 0,255,0,255);
+_assertPixel(canvas, 2,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.shape.1.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.shape.1.html
new file mode 100644
index 0000000000..42242536e2
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.shape.1.html
@@ -0,0 +1,39 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.arc.shape.1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.arc.shape.1</h1>
+<p class="desc">arc() from 0 to pi does not draw anything in the wrong half</p>
+
+
+<script>
+var t = async_test("arc() from 0 to pi does not draw anything in the wrong half");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 50;
+ctx.strokeStyle = '#f00';
+ctx.beginPath();
+ctx.arc(50, 50, 50, 0, Math.PI, false);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 20,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.shape.1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.shape.1.worker.js
new file mode 100644
index 0000000000..b41863bfb7
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.shape.1.worker.js
@@ -0,0 +1,35 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.arc.shape.1
+// Description:arc() from 0 to pi does not draw anything in the wrong half
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("arc() from 0 to pi does not draw anything in the wrong half");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 50;
+ctx.strokeStyle = '#f00';
+ctx.beginPath();
+ctx.arc(50, 50, 50, 0, Math.PI, false);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 20,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.shape.2.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.shape.2.html
new file mode 100644
index 0000000000..1e33a02416
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.shape.2.html
@@ -0,0 +1,39 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.arc.shape.2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.arc.shape.2</h1>
+<p class="desc">arc() from 0 to pi draws stuff in the right half</p>
+
+
+<script>
+var t = async_test("arc() from 0 to pi draws stuff in the right half");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 100;
+ctx.strokeStyle = '#0f0';
+ctx.beginPath();
+ctx.arc(50, 50, 50, 0, Math.PI, true);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 20,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.shape.2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.shape.2.worker.js
new file mode 100644
index 0000000000..d5d6cb7b7e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.shape.2.worker.js
@@ -0,0 +1,35 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.arc.shape.2
+// Description:arc() from 0 to pi draws stuff in the right half
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("arc() from 0 to pi draws stuff in the right half");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 100;
+ctx.strokeStyle = '#0f0';
+ctx.beginPath();
+ctx.arc(50, 50, 50, 0, Math.PI, true);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 20,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.shape.3.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.shape.3.html
new file mode 100644
index 0000000000..b90284e579
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.shape.3.html
@@ -0,0 +1,38 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.arc.shape.3</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.arc.shape.3</h1>
+<p class="desc">arc() from 0 to -pi/2 does not draw anything in the wrong quadrant</p>
+
+
+<script>
+var t = async_test("arc() from 0 to -pi/2 does not draw anything in the wrong quadrant");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 100;
+ctx.strokeStyle = '#f00';
+ctx.beginPath();
+ctx.arc(0, 50, 50, 0, -Math.PI/2, false);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.shape.3.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.shape.3.worker.js
new file mode 100644
index 0000000000..5d0cf80539
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.shape.3.worker.js
@@ -0,0 +1,34 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.arc.shape.3
+// Description:arc() from 0 to -pi/2 does not draw anything in the wrong quadrant
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("arc() from 0 to -pi/2 does not draw anything in the wrong quadrant");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 100;
+ctx.strokeStyle = '#f00';
+ctx.beginPath();
+ctx.arc(0, 50, 50, 0, -Math.PI/2, false);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.shape.4.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.shape.4.html
new file mode 100644
index 0000000000..dce9547a6b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.shape.4.html
@@ -0,0 +1,38 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.arc.shape.4</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.arc.shape.4</h1>
+<p class="desc">arc() from 0 to -pi/2 draws stuff in the right quadrant</p>
+
+
+<script>
+var t = async_test("arc() from 0 to -pi/2 draws stuff in the right quadrant");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 150;
+ctx.strokeStyle = '#0f0';
+ctx.beginPath();
+ctx.arc(-50, 50, 100, 0, -Math.PI/2, true);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.shape.4.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.shape.4.worker.js
new file mode 100644
index 0000000000..8bd028b0bd
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.shape.4.worker.js
@@ -0,0 +1,34 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.arc.shape.4
+// Description:arc() from 0 to -pi/2 draws stuff in the right quadrant
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("arc() from 0 to -pi/2 draws stuff in the right quadrant");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 150;
+ctx.strokeStyle = '#0f0';
+ctx.beginPath();
+ctx.arc(-50, 50, 100, 0, -Math.PI/2, true);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.shape.5.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.shape.5.html
new file mode 100644
index 0000000000..bd7e54af3b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.shape.5.html
@@ -0,0 +1,38 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.arc.shape.5</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.arc.shape.5</h1>
+<p class="desc">arc() from 0 to 5pi does not draw crazy things</p>
+
+
+<script>
+var t = async_test("arc() from 0 to 5pi does not draw crazy things");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 200;
+ctx.strokeStyle = '#f00';
+ctx.beginPath();
+ctx.arc(300, 0, 100, 0, 5*Math.PI, false);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.shape.5.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.shape.5.worker.js
new file mode 100644
index 0000000000..0584590afb
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.shape.5.worker.js
@@ -0,0 +1,34 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.arc.shape.5
+// Description:arc() from 0 to 5pi does not draw crazy things
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("arc() from 0 to 5pi does not draw crazy things");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 200;
+ctx.strokeStyle = '#f00';
+ctx.beginPath();
+ctx.arc(300, 0, 100, 0, 5*Math.PI, false);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.twopie.1.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.twopie.1.html
new file mode 100644
index 0000000000..ddf200c88b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.twopie.1.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.arc.twopie.1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.arc.twopie.1</h1>
+<p class="desc">arc() draws nothing when end = start + 2pi-e and anticlockwise</p>
+
+
+<script>
+var t = async_test("arc() draws nothing when end = start + 2pi-e and anticlockwise");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 100;
+ctx.beginPath();
+ctx.arc(50, 25, 50, 0, 2*Math.PI - 1e-4, true);
+ctx.stroke();
+_assertPixel(canvas, 50,20, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.twopie.1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.twopie.1.worker.js
new file mode 100644
index 0000000000..c56d25c70b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.twopie.1.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.arc.twopie.1
+// Description:arc() draws nothing when end = start + 2pi-e and anticlockwise
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("arc() draws nothing when end = start + 2pi-e and anticlockwise");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 100;
+ctx.beginPath();
+ctx.arc(50, 25, 50, 0, 2*Math.PI - 1e-4, true);
+ctx.stroke();
+_assertPixel(canvas, 50,20, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.twopie.2.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.twopie.2.html
new file mode 100644
index 0000000000..0a9e0c782a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.twopie.2.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.arc.twopie.2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.arc.twopie.2</h1>
+<p class="desc">arc() draws a full circle when end = start + 2pi-e and clockwise</p>
+
+
+<script>
+var t = async_test("arc() draws a full circle when end = start + 2pi-e and clockwise");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 100;
+ctx.beginPath();
+ctx.arc(50, 25, 50, 0, 2*Math.PI - 1e-4, false);
+ctx.stroke();
+_assertPixel(canvas, 50,20, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.twopie.2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.twopie.2.worker.js
new file mode 100644
index 0000000000..5db75de2a2
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.twopie.2.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.arc.twopie.2
+// Description:arc() draws a full circle when end = start + 2pi-e and clockwise
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("arc() draws a full circle when end = start + 2pi-e and clockwise");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 100;
+ctx.beginPath();
+ctx.arc(50, 25, 50, 0, 2*Math.PI - 1e-4, false);
+ctx.stroke();
+_assertPixel(canvas, 50,20, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.twopie.3.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.twopie.3.html
new file mode 100644
index 0000000000..df1e45480d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.twopie.3.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.arc.twopie.3</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.arc.twopie.3</h1>
+<p class="desc">arc() draws a full circle when end = start + 2pi+e and anticlockwise</p>
+
+
+<script>
+var t = async_test("arc() draws a full circle when end = start + 2pi+e and anticlockwise");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 100;
+ctx.beginPath();
+ctx.arc(50, 25, 50, 0, 2*Math.PI + 1e-4, true);
+ctx.stroke();
+_assertPixel(canvas, 50,20, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.twopie.3.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.twopie.3.worker.js
new file mode 100644
index 0000000000..0c984884c9
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.twopie.3.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.arc.twopie.3
+// Description:arc() draws a full circle when end = start + 2pi+e and anticlockwise
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("arc() draws a full circle when end = start + 2pi+e and anticlockwise");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 100;
+ctx.beginPath();
+ctx.arc(50, 25, 50, 0, 2*Math.PI + 1e-4, true);
+ctx.stroke();
+_assertPixel(canvas, 50,20, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.twopie.4.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.twopie.4.html
new file mode 100644
index 0000000000..8afa122c7c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.twopie.4.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.arc.twopie.4</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.arc.twopie.4</h1>
+<p class="desc">arc() draws nothing when end = start + 2pi+e and clockwise</p>
+
+
+<script>
+var t = async_test("arc() draws nothing when end = start + 2pi+e and clockwise");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 100;
+ctx.beginPath();
+ctx.arc(50, 25, 50, 0, 2*Math.PI + 1e-4, false);
+ctx.stroke();
+_assertPixel(canvas, 50,20, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.twopie.4.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.twopie.4.worker.js
new file mode 100644
index 0000000000..3158528f65
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.twopie.4.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.arc.twopie.4
+// Description:arc() draws nothing when end = start + 2pi+e and clockwise
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("arc() draws nothing when end = start + 2pi+e and clockwise");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 100;
+ctx.beginPath();
+ctx.arc(50, 25, 50, 0, 2*Math.PI + 1e-4, false);
+ctx.stroke();
+_assertPixel(canvas, 50,20, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.zero.1.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.zero.1.html
new file mode 100644
index 0000000000..f26162f223
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.zero.1.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.arc.zero.1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.arc.zero.1</h1>
+<p class="desc">arc() draws nothing when startAngle = endAngle and anticlockwise</p>
+
+
+<script>
+var t = async_test("arc() draws nothing when startAngle = endAngle and anticlockwise");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 100;
+ctx.beginPath();
+ctx.arc(50, 25, 50, 0, 0, true);
+ctx.stroke();
+_assertPixel(canvas, 50,20, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.zero.1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.zero.1.worker.js
new file mode 100644
index 0000000000..efb137a92a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.zero.1.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.arc.zero.1
+// Description:arc() draws nothing when startAngle = endAngle and anticlockwise
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("arc() draws nothing when startAngle = endAngle and anticlockwise");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 100;
+ctx.beginPath();
+ctx.arc(50, 25, 50, 0, 0, true);
+ctx.stroke();
+_assertPixel(canvas, 50,20, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.zero.2.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.zero.2.html
new file mode 100644
index 0000000000..f2eda4b8a2
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.zero.2.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.arc.zero.2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.arc.zero.2</h1>
+<p class="desc">arc() draws nothing when startAngle = endAngle and clockwise</p>
+
+
+<script>
+var t = async_test("arc() draws nothing when startAngle = endAngle and clockwise");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 100;
+ctx.beginPath();
+ctx.arc(50, 25, 50, 0, 0, false);
+ctx.stroke();
+_assertPixel(canvas, 50,20, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.zero.2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.zero.2.worker.js
new file mode 100644
index 0000000000..28f4f3759a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.zero.2.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.arc.zero.2
+// Description:arc() draws nothing when startAngle = endAngle and clockwise
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("arc() draws nothing when startAngle = endAngle and clockwise");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 100;
+ctx.beginPath();
+ctx.arc(50, 25, 50, 0, 0, false);
+ctx.stroke();
+_assertPixel(canvas, 50,20, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.zeroradius.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.zeroradius.html
new file mode 100644
index 0000000000..2d56e369b8
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.zeroradius.html
@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.arc.zeroradius</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.arc.zeroradius</h1>
+<p class="desc">arc() with zero radius draws a line to the start point</p>
+
+
+<script>
+var t = async_test("arc() with zero radius draws a line to the start point");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00'
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 50;
+ctx.strokeStyle = '#0f0';
+ctx.beginPath();
+ctx.moveTo(0, 25);
+ctx.arc(200, 25, 0, 0, Math.PI, true);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.zeroradius.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.zeroradius.worker.js
new file mode 100644
index 0000000000..c57046ab94
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arc.zeroradius.worker.js
@@ -0,0 +1,31 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.arc.zeroradius
+// Description:arc() with zero radius draws a line to the start point
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("arc() with zero radius draws a line to the start point");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00'
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 50;
+ctx.strokeStyle = '#0f0';
+ctx.beginPath();
+ctx.moveTo(0, 25);
+ctx.arc(200, 25, 0, 0, Math.PI, true);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.coincide.1.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.coincide.1.html
new file mode 100644
index 0000000000..58b2635699
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.coincide.1.html
@@ -0,0 +1,43 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.arcTo.coincide.1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.arcTo.coincide.1</h1>
+<p class="desc">arcTo() has no effect if P0 = P1</p>
+
+
+<script>
+var t = async_test("arcTo() has no effect if P0 = P1");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 50;
+ctx.strokeStyle = '#0f0';
+ctx.beginPath();
+ctx.moveTo(0, 25);
+ctx.arcTo(0, 25, 50, 1000, 1);
+ctx.lineTo(100, 25);
+ctx.stroke();
+ctx.strokeStyle = '#f00';
+ctx.beginPath();
+ctx.moveTo(50, 25);
+ctx.arcTo(50, 25, 100, 25, 1);
+ctx.stroke();
+_assertPixel(canvas, 50,1, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 50,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.coincide.1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.coincide.1.worker.js
new file mode 100644
index 0000000000..44926712fc
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.coincide.1.worker.js
@@ -0,0 +1,39 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.arcTo.coincide.1
+// Description:arcTo() has no effect if P0 = P1
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("arcTo() has no effect if P0 = P1");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 50;
+ctx.strokeStyle = '#0f0';
+ctx.beginPath();
+ctx.moveTo(0, 25);
+ctx.arcTo(0, 25, 50, 1000, 1);
+ctx.lineTo(100, 25);
+ctx.stroke();
+ctx.strokeStyle = '#f00';
+ctx.beginPath();
+ctx.moveTo(50, 25);
+ctx.arcTo(50, 25, 100, 25, 1);
+ctx.stroke();
+_assertPixel(canvas, 50,1, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 50,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.coincide.2.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.coincide.2.html
new file mode 100644
index 0000000000..d85e310c85
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.coincide.2.html
@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.arcTo.coincide.2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.arcTo.coincide.2</h1>
+<p class="desc">arcTo() draws a straight line to P1 if P1 = P2</p>
+
+
+<script>
+var t = async_test("arcTo() draws a straight line to P1 if P1 = P2");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 50;
+ctx.strokeStyle = '#0f0';
+ctx.beginPath();
+ctx.moveTo(0, 25);
+ctx.arcTo(100, 25, 100, 25, 1);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.coincide.2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.coincide.2.worker.js
new file mode 100644
index 0000000000..c8b336a494
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.coincide.2.worker.js
@@ -0,0 +1,31 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.arcTo.coincide.2
+// Description:arcTo() draws a straight line to P1 if P1 = P2
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("arcTo() draws a straight line to P1 if P1 = P2");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 50;
+ctx.strokeStyle = '#0f0';
+ctx.beginPath();
+ctx.moveTo(0, 25);
+ctx.arcTo(100, 25, 100, 25, 1);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.collinear.1.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.collinear.1.html
new file mode 100644
index 0000000000..5531ca62ae
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.collinear.1.html
@@ -0,0 +1,40 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.arcTo.collinear.1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.arcTo.collinear.1</h1>
+<p class="desc">arcTo() with all points on a line, and P1 between P0/P2, draws a straight line to P1</p>
+
+
+<script>
+var t = async_test("arcTo() with all points on a line, and P1 between P0/P2, draws a straight line to P1");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 50;
+ctx.strokeStyle = '#0f0';
+ctx.beginPath();
+ctx.moveTo(0, 25);
+ctx.arcTo(100, 25, 200, 25, 1);
+ctx.stroke();
+ctx.strokeStyle = '#f00';
+ctx.beginPath();
+ctx.moveTo(-100, 25);
+ctx.arcTo(0, 25, 100, 25, 1);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.collinear.1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.collinear.1.worker.js
new file mode 100644
index 0000000000..3864a311db
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.collinear.1.worker.js
@@ -0,0 +1,36 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.arcTo.collinear.1
+// Description:arcTo() with all points on a line, and P1 between P0/P2, draws a straight line to P1
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("arcTo() with all points on a line, and P1 between P0/P2, draws a straight line to P1");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 50;
+ctx.strokeStyle = '#0f0';
+ctx.beginPath();
+ctx.moveTo(0, 25);
+ctx.arcTo(100, 25, 200, 25, 1);
+ctx.stroke();
+ctx.strokeStyle = '#f00';
+ctx.beginPath();
+ctx.moveTo(-100, 25);
+ctx.arcTo(0, 25, 100, 25, 1);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.collinear.2.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.collinear.2.html
new file mode 100644
index 0000000000..a78d626ef0
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.collinear.2.html
@@ -0,0 +1,40 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.arcTo.collinear.2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.arcTo.collinear.2</h1>
+<p class="desc">arcTo() with all points on a line, and P2 between P0/P1, draws a straight line to P1</p>
+
+
+<script>
+var t = async_test("arcTo() with all points on a line, and P2 between P0/P1, draws a straight line to P1");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 50;
+ctx.strokeStyle = '#0f0';
+ctx.beginPath();
+ctx.moveTo(0, 25);
+ctx.arcTo(100, 25, 10, 25, 1);
+ctx.stroke();
+ctx.strokeStyle = '#f00';
+ctx.beginPath();
+ctx.moveTo(100, 25);
+ctx.arcTo(200, 25, 110, 25, 1);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.collinear.2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.collinear.2.worker.js
new file mode 100644
index 0000000000..6f4c2aa8c6
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.collinear.2.worker.js
@@ -0,0 +1,36 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.arcTo.collinear.2
+// Description:arcTo() with all points on a line, and P2 between P0/P1, draws a straight line to P1
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("arcTo() with all points on a line, and P2 between P0/P1, draws a straight line to P1");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 50;
+ctx.strokeStyle = '#0f0';
+ctx.beginPath();
+ctx.moveTo(0, 25);
+ctx.arcTo(100, 25, 10, 25, 1);
+ctx.stroke();
+ctx.strokeStyle = '#f00';
+ctx.beginPath();
+ctx.moveTo(100, 25);
+ctx.arcTo(200, 25, 110, 25, 1);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.collinear.3.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.collinear.3.html
new file mode 100644
index 0000000000..f2d52e4241
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.collinear.3.html
@@ -0,0 +1,44 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.arcTo.collinear.3</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.arcTo.collinear.3</h1>
+<p class="desc">arcTo() with all points on a line, and P0 between P1/P2, draws a straight line to P1</p>
+
+
+<script>
+var t = async_test("arcTo() with all points on a line, and P0 between P1/P2, draws a straight line to P1");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 50;
+ctx.strokeStyle = '#0f0';
+ctx.beginPath();
+ctx.moveTo(0, 25);
+ctx.arcTo(100, 25, -100, 25, 1);
+ctx.stroke();
+ctx.strokeStyle = '#f00';
+ctx.beginPath();
+ctx.moveTo(100, 25);
+ctx.arcTo(200, 25, 0, 25, 1);
+ctx.stroke();
+ctx.beginPath();
+ctx.moveTo(-100, 25);
+ctx.arcTo(0, 25, -200, 25, 1);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.collinear.3.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.collinear.3.worker.js
new file mode 100644
index 0000000000..2d152b0d83
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.collinear.3.worker.js
@@ -0,0 +1,40 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.arcTo.collinear.3
+// Description:arcTo() with all points on a line, and P0 between P1/P2, draws a straight line to P1
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("arcTo() with all points on a line, and P0 between P1/P2, draws a straight line to P1");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 50;
+ctx.strokeStyle = '#0f0';
+ctx.beginPath();
+ctx.moveTo(0, 25);
+ctx.arcTo(100, 25, -100, 25, 1);
+ctx.stroke();
+ctx.strokeStyle = '#f00';
+ctx.beginPath();
+ctx.moveTo(100, 25);
+ctx.arcTo(200, 25, 0, 25, 1);
+ctx.stroke();
+ctx.beginPath();
+ctx.moveTo(-100, 25);
+ctx.arcTo(0, 25, -200, 25, 1);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.ensuresubpath.1.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.ensuresubpath.1.html
new file mode 100644
index 0000000000..81dc7b1bd8
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.ensuresubpath.1.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.arcTo.ensuresubpath.1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.arcTo.ensuresubpath.1</h1>
+<p class="desc">If there is no subpath, the first control point is added (and nothing is drawn up to it)</p>
+
+
+<script>
+var t = async_test("If there is no subpath, the first control point is added (and nothing is drawn up to it)");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 50;
+ctx.strokeStyle = '#f00';
+ctx.beginPath();
+ctx.arcTo(100, 50, 200, 50, 0.1);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.ensuresubpath.1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.ensuresubpath.1.worker.js
new file mode 100644
index 0000000000..99354ac735
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.ensuresubpath.1.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.arcTo.ensuresubpath.1
+// Description:If there is no subpath, the first control point is added (and nothing is drawn up to it)
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("If there is no subpath, the first control point is added (and nothing is drawn up to it)");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 50;
+ctx.strokeStyle = '#f00';
+ctx.beginPath();
+ctx.arcTo(100, 50, 200, 50, 0.1);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.ensuresubpath.2.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.ensuresubpath.2.html
new file mode 100644
index 0000000000..43c9aec294
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.ensuresubpath.2.html
@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.arcTo.ensuresubpath.2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.arcTo.ensuresubpath.2</h1>
+<p class="desc">If there is no subpath, the first control point is added</p>
+
+
+<script>
+var t = async_test("If there is no subpath, the first control point is added");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 50;
+ctx.strokeStyle = '#0f0';
+ctx.beginPath();
+ctx.arcTo(0, 25, 50, 250, 0.1); // adds (x1,y1), draws nothing
+ctx.lineTo(100, 25);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.ensuresubpath.2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.ensuresubpath.2.worker.js
new file mode 100644
index 0000000000..aad3d006c9
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.ensuresubpath.2.worker.js
@@ -0,0 +1,31 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.arcTo.ensuresubpath.2
+// Description:If there is no subpath, the first control point is added
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("If there is no subpath, the first control point is added");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 50;
+ctx.strokeStyle = '#0f0';
+ctx.beginPath();
+ctx.arcTo(0, 25, 50, 250, 0.1); // adds (x1,y1), draws nothing
+ctx.lineTo(100, 25);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.negative.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.negative.html
new file mode 100644
index 0000000000..59cf973977
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.negative.html
@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.arcTo.negative</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.arcTo.negative</h1>
+<p class="desc">arcTo() with negative radius throws an exception</p>
+
+
+<script>
+var t = async_test("arcTo() with negative radius throws an exception");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_dom("INDEX_SIZE_ERR", function() { ctx.arcTo(0, 0, 0, 0, -1); });
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.negative.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.negative.worker.js
new file mode 100644
index 0000000000..60813e88bc
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.negative.worker.js
@@ -0,0 +1,23 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.arcTo.negative
+// Description:arcTo() with negative radius throws an exception
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("arcTo() with negative radius throws an exception");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_dom("INDEX_SIZE_ERR", function() { ctx.arcTo(0, 0, 0, 0, -1); });
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.nonfinite.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.nonfinite.html
new file mode 100644
index 0000000000..982ad4a964
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.nonfinite.html
@@ -0,0 +1,75 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.arcTo.nonfinite</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.arcTo.nonfinite</h1>
+<p class="desc">arcTo() with Infinity/NaN is ignored</p>
+
+
+<script>
+var t = async_test("arcTo() with Infinity/NaN is ignored");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.moveTo(0, 0);
+ctx.lineTo(100, 0);
+ctx.arcTo(Infinity, 50, 0, 50, 0);
+ctx.arcTo(-Infinity, 50, 0, 50, 0);
+ctx.arcTo(NaN, 50, 0, 50, 0);
+ctx.arcTo(0, Infinity, 0, 50, 0);
+ctx.arcTo(0, -Infinity, 0, 50, 0);
+ctx.arcTo(0, NaN, 0, 50, 0);
+ctx.arcTo(0, 50, Infinity, 50, 0);
+ctx.arcTo(0, 50, -Infinity, 50, 0);
+ctx.arcTo(0, 50, NaN, 50, 0);
+ctx.arcTo(0, 50, 0, Infinity, 0);
+ctx.arcTo(0, 50, 0, -Infinity, 0);
+ctx.arcTo(0, 50, 0, NaN, 0);
+ctx.arcTo(0, 50, 0, 50, Infinity);
+ctx.arcTo(0, 50, 0, 50, -Infinity);
+ctx.arcTo(0, 50, 0, 50, NaN);
+ctx.arcTo(Infinity, Infinity, 0, 50, 0);
+ctx.arcTo(Infinity, Infinity, Infinity, 50, 0);
+ctx.arcTo(Infinity, Infinity, Infinity, Infinity, 0);
+ctx.arcTo(Infinity, Infinity, Infinity, Infinity, Infinity);
+ctx.arcTo(Infinity, Infinity, Infinity, 50, Infinity);
+ctx.arcTo(Infinity, Infinity, 0, Infinity, 0);
+ctx.arcTo(Infinity, Infinity, 0, Infinity, Infinity);
+ctx.arcTo(Infinity, Infinity, 0, 50, Infinity);
+ctx.arcTo(Infinity, 50, Infinity, 50, 0);
+ctx.arcTo(Infinity, 50, Infinity, Infinity, 0);
+ctx.arcTo(Infinity, 50, Infinity, Infinity, Infinity);
+ctx.arcTo(Infinity, 50, Infinity, 50, Infinity);
+ctx.arcTo(Infinity, 50, 0, Infinity, 0);
+ctx.arcTo(Infinity, 50, 0, Infinity, Infinity);
+ctx.arcTo(Infinity, 50, 0, 50, Infinity);
+ctx.arcTo(0, Infinity, Infinity, 50, 0);
+ctx.arcTo(0, Infinity, Infinity, Infinity, 0);
+ctx.arcTo(0, Infinity, Infinity, Infinity, Infinity);
+ctx.arcTo(0, Infinity, Infinity, 50, Infinity);
+ctx.arcTo(0, Infinity, 0, Infinity, 0);
+ctx.arcTo(0, Infinity, 0, Infinity, Infinity);
+ctx.arcTo(0, Infinity, 0, 50, Infinity);
+ctx.arcTo(0, 50, Infinity, Infinity, 0);
+ctx.arcTo(0, 50, Infinity, Infinity, Infinity);
+ctx.arcTo(0, 50, Infinity, 50, Infinity);
+ctx.arcTo(0, 50, 0, Infinity, Infinity);
+ctx.lineTo(100, 50);
+ctx.lineTo(0, 50);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 90,45, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.nonfinite.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.nonfinite.worker.js
new file mode 100644
index 0000000000..6aa674fc90
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.nonfinite.worker.js
@@ -0,0 +1,71 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.arcTo.nonfinite
+// Description:arcTo() with Infinity/NaN is ignored
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("arcTo() with Infinity/NaN is ignored");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.moveTo(0, 0);
+ctx.lineTo(100, 0);
+ctx.arcTo(Infinity, 50, 0, 50, 0);
+ctx.arcTo(-Infinity, 50, 0, 50, 0);
+ctx.arcTo(NaN, 50, 0, 50, 0);
+ctx.arcTo(0, Infinity, 0, 50, 0);
+ctx.arcTo(0, -Infinity, 0, 50, 0);
+ctx.arcTo(0, NaN, 0, 50, 0);
+ctx.arcTo(0, 50, Infinity, 50, 0);
+ctx.arcTo(0, 50, -Infinity, 50, 0);
+ctx.arcTo(0, 50, NaN, 50, 0);
+ctx.arcTo(0, 50, 0, Infinity, 0);
+ctx.arcTo(0, 50, 0, -Infinity, 0);
+ctx.arcTo(0, 50, 0, NaN, 0);
+ctx.arcTo(0, 50, 0, 50, Infinity);
+ctx.arcTo(0, 50, 0, 50, -Infinity);
+ctx.arcTo(0, 50, 0, 50, NaN);
+ctx.arcTo(Infinity, Infinity, 0, 50, 0);
+ctx.arcTo(Infinity, Infinity, Infinity, 50, 0);
+ctx.arcTo(Infinity, Infinity, Infinity, Infinity, 0);
+ctx.arcTo(Infinity, Infinity, Infinity, Infinity, Infinity);
+ctx.arcTo(Infinity, Infinity, Infinity, 50, Infinity);
+ctx.arcTo(Infinity, Infinity, 0, Infinity, 0);
+ctx.arcTo(Infinity, Infinity, 0, Infinity, Infinity);
+ctx.arcTo(Infinity, Infinity, 0, 50, Infinity);
+ctx.arcTo(Infinity, 50, Infinity, 50, 0);
+ctx.arcTo(Infinity, 50, Infinity, Infinity, 0);
+ctx.arcTo(Infinity, 50, Infinity, Infinity, Infinity);
+ctx.arcTo(Infinity, 50, Infinity, 50, Infinity);
+ctx.arcTo(Infinity, 50, 0, Infinity, 0);
+ctx.arcTo(Infinity, 50, 0, Infinity, Infinity);
+ctx.arcTo(Infinity, 50, 0, 50, Infinity);
+ctx.arcTo(0, Infinity, Infinity, 50, 0);
+ctx.arcTo(0, Infinity, Infinity, Infinity, 0);
+ctx.arcTo(0, Infinity, Infinity, Infinity, Infinity);
+ctx.arcTo(0, Infinity, Infinity, 50, Infinity);
+ctx.arcTo(0, Infinity, 0, Infinity, 0);
+ctx.arcTo(0, Infinity, 0, Infinity, Infinity);
+ctx.arcTo(0, Infinity, 0, 50, Infinity);
+ctx.arcTo(0, 50, Infinity, Infinity, 0);
+ctx.arcTo(0, 50, Infinity, Infinity, Infinity);
+ctx.arcTo(0, 50, Infinity, 50, Infinity);
+ctx.arcTo(0, 50, 0, Infinity, Infinity);
+ctx.lineTo(100, 50);
+ctx.lineTo(0, 50);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 90,45, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.scale.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.scale.html
new file mode 100644
index 0000000000..7139455bda
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.scale.html
@@ -0,0 +1,45 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.arcTo.scale</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.arcTo.scale</h1>
+<p class="desc">arcTo scales the curve, not just the control points</p>
+
+
+<script>
+var t = async_test("arcTo scales the curve, not just the control points");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.beginPath();
+ctx.moveTo(0, 50);
+ctx.translate(100, 0);
+ctx.scale(0.1, 1);
+ctx.arcTo(50, 50, 50, 0, 50);
+ctx.lineTo(-1000, 0);
+ctx.fill();
+_assertPixel(canvas, 0,0, 0,255,0,255);
+_assertPixel(canvas, 50,0, 0,255,0,255);
+_assertPixel(canvas, 99,0, 0,255,0,255);
+_assertPixel(canvas, 0,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 99,25, 0,255,0,255);
+_assertPixel(canvas, 0,49, 0,255,0,255);
+_assertPixel(canvas, 50,49, 0,255,0,255);
+_assertPixel(canvas, 99,49, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.scale.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.scale.worker.js
new file mode 100644
index 0000000000..b06c8f935c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.scale.worker.js
@@ -0,0 +1,41 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.arcTo.scale
+// Description:arcTo scales the curve, not just the control points
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("arcTo scales the curve, not just the control points");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.beginPath();
+ctx.moveTo(0, 50);
+ctx.translate(100, 0);
+ctx.scale(0.1, 1);
+ctx.arcTo(50, 50, 50, 0, 50);
+ctx.lineTo(-1000, 0);
+ctx.fill();
+_assertPixel(canvas, 0,0, 0,255,0,255);
+_assertPixel(canvas, 50,0, 0,255,0,255);
+_assertPixel(canvas, 99,0, 0,255,0,255);
+_assertPixel(canvas, 0,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 99,25, 0,255,0,255);
+_assertPixel(canvas, 0,49, 0,255,0,255);
+_assertPixel(canvas, 50,49, 0,255,0,255);
+_assertPixel(canvas, 99,49, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.shape.curve1.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.shape.curve1.html
new file mode 100644
index 0000000000..659b02ceed
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.shape.curve1.html
@@ -0,0 +1,56 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.arcTo.shape.curve1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.arcTo.shape.curve1</h1>
+<p class="desc">arcTo() curves in the right kind of shape</p>
+
+
+<script>
+var t = async_test("arcTo() curves in the right kind of shape");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var tol = 1.5; // tolerance to avoid antialiasing artifacts
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 10;
+ctx.beginPath();
+ctx.moveTo(10, 25);
+ctx.arcTo(75, 25, 75, 60, 20);
+ctx.stroke();
+ctx.fillStyle = '#0f0';
+ctx.beginPath();
+ctx.rect(10, 20, 45, 10);
+ctx.moveTo(80, 45);
+ctx.arc(55, 45, 25+tol, 0, -Math.PI/2, true);
+ctx.arc(55, 45, 15-tol, -Math.PI/2, 0, false);
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 55,19, 0,255,0,255);
+_assertPixel(canvas, 55,20, 0,255,0,255);
+_assertPixel(canvas, 55,21, 0,255,0,255);
+_assertPixel(canvas, 64,22, 0,255,0,255);
+_assertPixel(canvas, 65,21, 0,255,0,255);
+_assertPixel(canvas, 72,28, 0,255,0,255);
+_assertPixel(canvas, 73,27, 0,255,0,255);
+_assertPixel(canvas, 78,36, 0,255,0,255);
+_assertPixel(canvas, 79,35, 0,255,0,255);
+_assertPixel(canvas, 80,44, 0,255,0,255);
+_assertPixel(canvas, 80,45, 0,255,0,255);
+_assertPixel(canvas, 80,46, 0,255,0,255);
+_assertPixel(canvas, 65,45, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.shape.curve1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.shape.curve1.worker.js
new file mode 100644
index 0000000000..5223b55abb
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.shape.curve1.worker.js
@@ -0,0 +1,52 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.arcTo.shape.curve1
+// Description:arcTo() curves in the right kind of shape
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("arcTo() curves in the right kind of shape");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var tol = 1.5; // tolerance to avoid antialiasing artifacts
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 10;
+ctx.beginPath();
+ctx.moveTo(10, 25);
+ctx.arcTo(75, 25, 75, 60, 20);
+ctx.stroke();
+ctx.fillStyle = '#0f0';
+ctx.beginPath();
+ctx.rect(10, 20, 45, 10);
+ctx.moveTo(80, 45);
+ctx.arc(55, 45, 25+tol, 0, -Math.PI/2, true);
+ctx.arc(55, 45, 15-tol, -Math.PI/2, 0, false);
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 55,19, 0,255,0,255);
+_assertPixel(canvas, 55,20, 0,255,0,255);
+_assertPixel(canvas, 55,21, 0,255,0,255);
+_assertPixel(canvas, 64,22, 0,255,0,255);
+_assertPixel(canvas, 65,21, 0,255,0,255);
+_assertPixel(canvas, 72,28, 0,255,0,255);
+_assertPixel(canvas, 73,27, 0,255,0,255);
+_assertPixel(canvas, 78,36, 0,255,0,255);
+_assertPixel(canvas, 79,35, 0,255,0,255);
+_assertPixel(canvas, 80,44, 0,255,0,255);
+_assertPixel(canvas, 80,45, 0,255,0,255);
+_assertPixel(canvas, 80,46, 0,255,0,255);
+_assertPixel(canvas, 65,45, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.shape.curve2.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.shape.curve2.html
new file mode 100644
index 0000000000..02ab6c1437
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.shape.curve2.html
@@ -0,0 +1,55 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.arcTo.shape.curve2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.arcTo.shape.curve2</h1>
+<p class="desc">arcTo() curves in the right kind of shape</p>
+
+
+<script>
+var t = async_test("arcTo() curves in the right kind of shape");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var tol = 1.5; // tolerance to avoid antialiasing artifacts
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.beginPath();
+ctx.rect(10, 20, 45, 10);
+ctx.moveTo(80, 45);
+ctx.arc(55, 45, 25-tol, 0, -Math.PI/2, true);
+ctx.arc(55, 45, 15+tol, -Math.PI/2, 0, false);
+ctx.fill();
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 10;
+ctx.beginPath();
+ctx.moveTo(10, 25);
+ctx.arcTo(75, 25, 75, 60, 20);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 55,19, 0,255,0,255);
+_assertPixel(canvas, 55,20, 0,255,0,255);
+_assertPixel(canvas, 55,21, 0,255,0,255);
+_assertPixel(canvas, 64,22, 0,255,0,255);
+_assertPixel(canvas, 65,21, 0,255,0,255);
+_assertPixel(canvas, 72,28, 0,255,0,255);
+_assertPixel(canvas, 73,27, 0,255,0,255);
+_assertPixel(canvas, 78,36, 0,255,0,255);
+_assertPixel(canvas, 79,35, 0,255,0,255);
+_assertPixel(canvas, 80,44, 0,255,0,255);
+_assertPixel(canvas, 80,45, 0,255,0,255);
+_assertPixel(canvas, 80,46, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.shape.curve2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.shape.curve2.worker.js
new file mode 100644
index 0000000000..f06c2cdc33
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.shape.curve2.worker.js
@@ -0,0 +1,51 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.arcTo.shape.curve2
+// Description:arcTo() curves in the right kind of shape
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("arcTo() curves in the right kind of shape");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var tol = 1.5; // tolerance to avoid antialiasing artifacts
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.beginPath();
+ctx.rect(10, 20, 45, 10);
+ctx.moveTo(80, 45);
+ctx.arc(55, 45, 25-tol, 0, -Math.PI/2, true);
+ctx.arc(55, 45, 15+tol, -Math.PI/2, 0, false);
+ctx.fill();
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 10;
+ctx.beginPath();
+ctx.moveTo(10, 25);
+ctx.arcTo(75, 25, 75, 60, 20);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 55,19, 0,255,0,255);
+_assertPixel(canvas, 55,20, 0,255,0,255);
+_assertPixel(canvas, 55,21, 0,255,0,255);
+_assertPixel(canvas, 64,22, 0,255,0,255);
+_assertPixel(canvas, 65,21, 0,255,0,255);
+_assertPixel(canvas, 72,28, 0,255,0,255);
+_assertPixel(canvas, 73,27, 0,255,0,255);
+_assertPixel(canvas, 78,36, 0,255,0,255);
+_assertPixel(canvas, 79,35, 0,255,0,255);
+_assertPixel(canvas, 80,44, 0,255,0,255);
+_assertPixel(canvas, 80,45, 0,255,0,255);
+_assertPixel(canvas, 80,46, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.shape.end.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.shape.end.html
new file mode 100644
index 0000000000..0871c39157
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.shape.end.html
@@ -0,0 +1,39 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.arcTo.shape.end</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.arcTo.shape.end</h1>
+<p class="desc">arcTo() does not draw anything from P1 to P2</p>
+
+
+<script>
+var t = async_test("arcTo() does not draw anything from P1 to P2");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 50;
+ctx.beginPath();
+ctx.moveTo(-100, -100);
+ctx.arcTo(-100, 25, 200, 25, 10);
+ctx.stroke();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.shape.end.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.shape.end.worker.js
new file mode 100644
index 0000000000..f3addb0a0c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.shape.end.worker.js
@@ -0,0 +1,35 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.arcTo.shape.end
+// Description:arcTo() does not draw anything from P1 to P2
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("arcTo() does not draw anything from P1 to P2");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 50;
+ctx.beginPath();
+ctx.moveTo(-100, -100);
+ctx.arcTo(-100, 25, 200, 25, 10);
+ctx.stroke();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.shape.start.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.shape.start.html
new file mode 100644
index 0000000000..5040462ada
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.shape.start.html
@@ -0,0 +1,39 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.arcTo.shape.start</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.arcTo.shape.start</h1>
+<p class="desc">arcTo() draws a straight line from P0 to P1</p>
+
+
+<script>
+var t = async_test("arcTo() draws a straight line from P0 to P1");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 50;
+ctx.beginPath();
+ctx.moveTo(0, 25);
+ctx.arcTo(200, 25, 200, 50, 10);
+ctx.stroke();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.shape.start.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.shape.start.worker.js
new file mode 100644
index 0000000000..36706d600e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.shape.start.worker.js
@@ -0,0 +1,35 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.arcTo.shape.start
+// Description:arcTo() draws a straight line from P0 to P1
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("arcTo() draws a straight line from P0 to P1");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 50;
+ctx.beginPath();
+ctx.moveTo(0, 25);
+ctx.arcTo(200, 25, 200, 50, 10);
+ctx.stroke();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.transformation.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.transformation.html
new file mode 100644
index 0000000000..bea6374ea4
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.transformation.html
@@ -0,0 +1,44 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.arcTo.transformation</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.arcTo.transformation</h1>
+<p class="desc">arcTo joins up to the last subpath point correctly</p>
+
+
+<script>
+var t = async_test("arcTo joins up to the last subpath point correctly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.beginPath();
+ctx.moveTo(0, 50);
+ctx.translate(100, 0);
+ctx.arcTo(50, 50, 50, 0, 50);
+ctx.lineTo(-100, 0);
+ctx.fill();
+_assertPixel(canvas, 0,0, 0,255,0,255);
+_assertPixel(canvas, 50,0, 0,255,0,255);
+_assertPixel(canvas, 99,0, 0,255,0,255);
+_assertPixel(canvas, 0,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 99,25, 0,255,0,255);
+_assertPixel(canvas, 0,49, 0,255,0,255);
+_assertPixel(canvas, 50,49, 0,255,0,255);
+_assertPixel(canvas, 99,49, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.transformation.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.transformation.worker.js
new file mode 100644
index 0000000000..925140b675
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.transformation.worker.js
@@ -0,0 +1,40 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.arcTo.transformation
+// Description:arcTo joins up to the last subpath point correctly
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("arcTo joins up to the last subpath point correctly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.beginPath();
+ctx.moveTo(0, 50);
+ctx.translate(100, 0);
+ctx.arcTo(50, 50, 50, 0, 50);
+ctx.lineTo(-100, 0);
+ctx.fill();
+_assertPixel(canvas, 0,0, 0,255,0,255);
+_assertPixel(canvas, 50,0, 0,255,0,255);
+_assertPixel(canvas, 99,0, 0,255,0,255);
+_assertPixel(canvas, 0,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 99,25, 0,255,0,255);
+_assertPixel(canvas, 0,49, 0,255,0,255);
+_assertPixel(canvas, 50,49, 0,255,0,255);
+_assertPixel(canvas, 99,49, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.zero.1.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.zero.1.html
new file mode 100644
index 0000000000..00541a938b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.zero.1.html
@@ -0,0 +1,40 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.arcTo.zero.1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.arcTo.zero.1</h1>
+<p class="desc">arcTo() with zero radius draws a straight line from P0 to P1</p>
+
+
+<script>
+var t = async_test("arcTo() with zero radius draws a straight line from P0 to P1");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 50;
+ctx.strokeStyle = '#0f0';
+ctx.beginPath();
+ctx.moveTo(0, 25);
+ctx.arcTo(100, 25, 100, 100, 0);
+ctx.stroke();
+ctx.strokeStyle = '#f00';
+ctx.beginPath();
+ctx.moveTo(0, -25);
+ctx.arcTo(50, -25, 50, 50, 0);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.zero.1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.zero.1.worker.js
new file mode 100644
index 0000000000..cee6d1c5ba
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.zero.1.worker.js
@@ -0,0 +1,36 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.arcTo.zero.1
+// Description:arcTo() with zero radius draws a straight line from P0 to P1
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("arcTo() with zero radius draws a straight line from P0 to P1");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 50;
+ctx.strokeStyle = '#0f0';
+ctx.beginPath();
+ctx.moveTo(0, 25);
+ctx.arcTo(100, 25, 100, 100, 0);
+ctx.stroke();
+ctx.strokeStyle = '#f00';
+ctx.beginPath();
+ctx.moveTo(0, -25);
+ctx.arcTo(50, -25, 50, 50, 0);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.zero.2.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.zero.2.html
new file mode 100644
index 0000000000..e10fe5ce95
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.zero.2.html
@@ -0,0 +1,40 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.arcTo.zero.2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.arcTo.zero.2</h1>
+<p class="desc">arcTo() with zero radius draws a straight line from P0 to P1, even when all points are collinear</p>
+
+
+<script>
+var t = async_test("arcTo() with zero radius draws a straight line from P0 to P1, even when all points are collinear");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 50;
+ctx.strokeStyle = '#0f0';
+ctx.beginPath();
+ctx.moveTo(0, 25);
+ctx.arcTo(100, 25, -100, 25, 0);
+ctx.stroke();
+ctx.strokeStyle = '#f00';
+ctx.beginPath();
+ctx.moveTo(100, 25);
+ctx.arcTo(200, 25, 50, 25, 0);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.zero.2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.zero.2.worker.js
new file mode 100644
index 0000000000..d0cc4a1484
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.arcTo.zero.2.worker.js
@@ -0,0 +1,36 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.arcTo.zero.2
+// Description:arcTo() with zero radius draws a straight line from P0 to P1, even when all points are collinear
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("arcTo() with zero radius draws a straight line from P0 to P1, even when all points are collinear");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 50;
+ctx.strokeStyle = '#0f0';
+ctx.beginPath();
+ctx.moveTo(0, 25);
+ctx.arcTo(100, 25, -100, 25, 0);
+ctx.stroke();
+ctx.strokeStyle = '#f00';
+ctx.beginPath();
+ctx.moveTo(100, 25);
+ctx.arcTo(200, 25, 50, 25, 0);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.beginPath.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.beginPath.html
new file mode 100644
index 0000000000..8b9c4cdc7a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.beginPath.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.beginPath</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.beginPath</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.rect(0, 0, 100, 50);
+ctx.beginPath();
+ctx.fillStyle = '#f00';
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.beginPath.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.beginPath.worker.js
new file mode 100644
index 0000000000..18b81afa5c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.beginPath.worker.js
@@ -0,0 +1,29 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.beginPath
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.rect(0, 0, 100, 50);
+ctx.beginPath();
+ctx.fillStyle = '#f00';
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.bezierCurveTo.basic.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.bezierCurveTo.basic.html
new file mode 100644
index 0000000000..6917287432
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.bezierCurveTo.basic.html
@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.bezierCurveTo.basic</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.bezierCurveTo.basic</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 50;
+ctx.beginPath();
+ctx.moveTo(0, 25);
+ctx.bezierCurveTo(100, 25, 100, 25, 100, 25);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.bezierCurveTo.basic.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.bezierCurveTo.basic.worker.js
new file mode 100644
index 0000000000..a365372c9e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.bezierCurveTo.basic.worker.js
@@ -0,0 +1,31 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.bezierCurveTo.basic
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 50;
+ctx.beginPath();
+ctx.moveTo(0, 25);
+ctx.bezierCurveTo(100, 25, 100, 25, 100, 25);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.bezierCurveTo.ensuresubpath.1.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.bezierCurveTo.ensuresubpath.1.html
new file mode 100644
index 0000000000..67dd771fcb
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.bezierCurveTo.ensuresubpath.1.html
@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.bezierCurveTo.ensuresubpath.1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.bezierCurveTo.ensuresubpath.1</h1>
+<p class="desc">If there is no subpath, the first control point is added (and nothing is drawn up to it)</p>
+
+
+<script>
+var t = async_test("If there is no subpath, the first control point is added (and nothing is drawn up to it)");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 50;
+ctx.beginPath();
+ctx.bezierCurveTo(100, 50, 200, 50, 200, 50);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 95,45, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.bezierCurveTo.ensuresubpath.1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.bezierCurveTo.ensuresubpath.1.worker.js
new file mode 100644
index 0000000000..beb275ba37
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.bezierCurveTo.ensuresubpath.1.worker.js
@@ -0,0 +1,31 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.bezierCurveTo.ensuresubpath.1
+// Description:If there is no subpath, the first control point is added (and nothing is drawn up to it)
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("If there is no subpath, the first control point is added (and nothing is drawn up to it)");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 50;
+ctx.beginPath();
+ctx.bezierCurveTo(100, 50, 200, 50, 200, 50);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 95,45, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.bezierCurveTo.ensuresubpath.2.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.bezierCurveTo.ensuresubpath.2.html
new file mode 100644
index 0000000000..d4f99e1e2a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.bezierCurveTo.ensuresubpath.2.html
@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.bezierCurveTo.ensuresubpath.2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.bezierCurveTo.ensuresubpath.2</h1>
+<p class="desc">If there is no subpath, the first control point is added</p>
+
+
+<script>
+var t = async_test("If there is no subpath, the first control point is added");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 50;
+ctx.beginPath();
+ctx.bezierCurveTo(0, 25, 100, 25, 100, 25);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 5,45, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.bezierCurveTo.ensuresubpath.2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.bezierCurveTo.ensuresubpath.2.worker.js
new file mode 100644
index 0000000000..7176dba078
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.bezierCurveTo.ensuresubpath.2.worker.js
@@ -0,0 +1,31 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.bezierCurveTo.ensuresubpath.2
+// Description:If there is no subpath, the first control point is added
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("If there is no subpath, the first control point is added");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 50;
+ctx.beginPath();
+ctx.bezierCurveTo(0, 25, 100, 25, 100, 25);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 5,45, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.bezierCurveTo.nonfinite.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.bezierCurveTo.nonfinite.html
new file mode 100644
index 0000000000..4c5abfbdc1
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.bezierCurveTo.nonfinite.html
@@ -0,0 +1,109 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.bezierCurveTo.nonfinite</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.bezierCurveTo.nonfinite</h1>
+<p class="desc">bezierCurveTo() with Infinity/NaN is ignored</p>
+
+
+<script>
+var t = async_test("bezierCurveTo() with Infinity/NaN is ignored");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.moveTo(0, 0);
+ctx.lineTo(100, 0);
+ctx.bezierCurveTo(Infinity, 50, 0, 50, 0, 50);
+ctx.bezierCurveTo(-Infinity, 50, 0, 50, 0, 50);
+ctx.bezierCurveTo(NaN, 50, 0, 50, 0, 50);
+ctx.bezierCurveTo(0, Infinity, 0, 50, 0, 50);
+ctx.bezierCurveTo(0, -Infinity, 0, 50, 0, 50);
+ctx.bezierCurveTo(0, NaN, 0, 50, 0, 50);
+ctx.bezierCurveTo(0, 50, Infinity, 50, 0, 50);
+ctx.bezierCurveTo(0, 50, -Infinity, 50, 0, 50);
+ctx.bezierCurveTo(0, 50, NaN, 50, 0, 50);
+ctx.bezierCurveTo(0, 50, 0, Infinity, 0, 50);
+ctx.bezierCurveTo(0, 50, 0, -Infinity, 0, 50);
+ctx.bezierCurveTo(0, 50, 0, NaN, 0, 50);
+ctx.bezierCurveTo(0, 50, 0, 50, Infinity, 50);
+ctx.bezierCurveTo(0, 50, 0, 50, -Infinity, 50);
+ctx.bezierCurveTo(0, 50, 0, 50, NaN, 50);
+ctx.bezierCurveTo(0, 50, 0, 50, 0, Infinity);
+ctx.bezierCurveTo(0, 50, 0, 50, 0, -Infinity);
+ctx.bezierCurveTo(0, 50, 0, 50, 0, NaN);
+ctx.bezierCurveTo(Infinity, Infinity, 0, 50, 0, 50);
+ctx.bezierCurveTo(Infinity, Infinity, Infinity, 50, 0, 50);
+ctx.bezierCurveTo(Infinity, Infinity, Infinity, Infinity, 0, 50);
+ctx.bezierCurveTo(Infinity, Infinity, Infinity, Infinity, Infinity, 50);
+ctx.bezierCurveTo(Infinity, Infinity, Infinity, Infinity, Infinity, Infinity);
+ctx.bezierCurveTo(Infinity, Infinity, Infinity, Infinity, 0, Infinity);
+ctx.bezierCurveTo(Infinity, Infinity, Infinity, 50, Infinity, 50);
+ctx.bezierCurveTo(Infinity, Infinity, Infinity, 50, Infinity, Infinity);
+ctx.bezierCurveTo(Infinity, Infinity, Infinity, 50, 0, Infinity);
+ctx.bezierCurveTo(Infinity, Infinity, 0, Infinity, 0, 50);
+ctx.bezierCurveTo(Infinity, Infinity, 0, Infinity, Infinity, 50);
+ctx.bezierCurveTo(Infinity, Infinity, 0, Infinity, Infinity, Infinity);
+ctx.bezierCurveTo(Infinity, Infinity, 0, Infinity, 0, Infinity);
+ctx.bezierCurveTo(Infinity, Infinity, 0, 50, Infinity, 50);
+ctx.bezierCurveTo(Infinity, Infinity, 0, 50, Infinity, Infinity);
+ctx.bezierCurveTo(Infinity, Infinity, 0, 50, 0, Infinity);
+ctx.bezierCurveTo(Infinity, 50, Infinity, 50, 0, 50);
+ctx.bezierCurveTo(Infinity, 50, Infinity, Infinity, 0, 50);
+ctx.bezierCurveTo(Infinity, 50, Infinity, Infinity, Infinity, 50);
+ctx.bezierCurveTo(Infinity, 50, Infinity, Infinity, Infinity, Infinity);
+ctx.bezierCurveTo(Infinity, 50, Infinity, Infinity, 0, Infinity);
+ctx.bezierCurveTo(Infinity, 50, Infinity, 50, Infinity, 50);
+ctx.bezierCurveTo(Infinity, 50, Infinity, 50, Infinity, Infinity);
+ctx.bezierCurveTo(Infinity, 50, Infinity, 50, 0, Infinity);
+ctx.bezierCurveTo(Infinity, 50, 0, Infinity, 0, 50);
+ctx.bezierCurveTo(Infinity, 50, 0, Infinity, Infinity, 50);
+ctx.bezierCurveTo(Infinity, 50, 0, Infinity, Infinity, Infinity);
+ctx.bezierCurveTo(Infinity, 50, 0, Infinity, 0, Infinity);
+ctx.bezierCurveTo(Infinity, 50, 0, 50, Infinity, 50);
+ctx.bezierCurveTo(Infinity, 50, 0, 50, Infinity, Infinity);
+ctx.bezierCurveTo(Infinity, 50, 0, 50, 0, Infinity);
+ctx.bezierCurveTo(0, Infinity, Infinity, 50, 0, 50);
+ctx.bezierCurveTo(0, Infinity, Infinity, Infinity, 0, 50);
+ctx.bezierCurveTo(0, Infinity, Infinity, Infinity, Infinity, 50);
+ctx.bezierCurveTo(0, Infinity, Infinity, Infinity, Infinity, Infinity);
+ctx.bezierCurveTo(0, Infinity, Infinity, Infinity, 0, Infinity);
+ctx.bezierCurveTo(0, Infinity, Infinity, 50, Infinity, 50);
+ctx.bezierCurveTo(0, Infinity, Infinity, 50, Infinity, Infinity);
+ctx.bezierCurveTo(0, Infinity, Infinity, 50, 0, Infinity);
+ctx.bezierCurveTo(0, Infinity, 0, Infinity, 0, 50);
+ctx.bezierCurveTo(0, Infinity, 0, Infinity, Infinity, 50);
+ctx.bezierCurveTo(0, Infinity, 0, Infinity, Infinity, Infinity);
+ctx.bezierCurveTo(0, Infinity, 0, Infinity, 0, Infinity);
+ctx.bezierCurveTo(0, Infinity, 0, 50, Infinity, 50);
+ctx.bezierCurveTo(0, Infinity, 0, 50, Infinity, Infinity);
+ctx.bezierCurveTo(0, Infinity, 0, 50, 0, Infinity);
+ctx.bezierCurveTo(0, 50, Infinity, Infinity, 0, 50);
+ctx.bezierCurveTo(0, 50, Infinity, Infinity, Infinity, 50);
+ctx.bezierCurveTo(0, 50, Infinity, Infinity, Infinity, Infinity);
+ctx.bezierCurveTo(0, 50, Infinity, Infinity, 0, Infinity);
+ctx.bezierCurveTo(0, 50, Infinity, 50, Infinity, 50);
+ctx.bezierCurveTo(0, 50, Infinity, 50, Infinity, Infinity);
+ctx.bezierCurveTo(0, 50, Infinity, 50, 0, Infinity);
+ctx.bezierCurveTo(0, 50, 0, Infinity, Infinity, 50);
+ctx.bezierCurveTo(0, 50, 0, Infinity, Infinity, Infinity);
+ctx.bezierCurveTo(0, 50, 0, Infinity, 0, Infinity);
+ctx.bezierCurveTo(0, 50, 0, 50, Infinity, Infinity);
+ctx.lineTo(100, 50);
+ctx.lineTo(0, 50);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 90,45, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.bezierCurveTo.nonfinite.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.bezierCurveTo.nonfinite.worker.js
new file mode 100644
index 0000000000..752cb1b0ab
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.bezierCurveTo.nonfinite.worker.js
@@ -0,0 +1,105 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.bezierCurveTo.nonfinite
+// Description:bezierCurveTo() with Infinity/NaN is ignored
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("bezierCurveTo() with Infinity/NaN is ignored");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.moveTo(0, 0);
+ctx.lineTo(100, 0);
+ctx.bezierCurveTo(Infinity, 50, 0, 50, 0, 50);
+ctx.bezierCurveTo(-Infinity, 50, 0, 50, 0, 50);
+ctx.bezierCurveTo(NaN, 50, 0, 50, 0, 50);
+ctx.bezierCurveTo(0, Infinity, 0, 50, 0, 50);
+ctx.bezierCurveTo(0, -Infinity, 0, 50, 0, 50);
+ctx.bezierCurveTo(0, NaN, 0, 50, 0, 50);
+ctx.bezierCurveTo(0, 50, Infinity, 50, 0, 50);
+ctx.bezierCurveTo(0, 50, -Infinity, 50, 0, 50);
+ctx.bezierCurveTo(0, 50, NaN, 50, 0, 50);
+ctx.bezierCurveTo(0, 50, 0, Infinity, 0, 50);
+ctx.bezierCurveTo(0, 50, 0, -Infinity, 0, 50);
+ctx.bezierCurveTo(0, 50, 0, NaN, 0, 50);
+ctx.bezierCurveTo(0, 50, 0, 50, Infinity, 50);
+ctx.bezierCurveTo(0, 50, 0, 50, -Infinity, 50);
+ctx.bezierCurveTo(0, 50, 0, 50, NaN, 50);
+ctx.bezierCurveTo(0, 50, 0, 50, 0, Infinity);
+ctx.bezierCurveTo(0, 50, 0, 50, 0, -Infinity);
+ctx.bezierCurveTo(0, 50, 0, 50, 0, NaN);
+ctx.bezierCurveTo(Infinity, Infinity, 0, 50, 0, 50);
+ctx.bezierCurveTo(Infinity, Infinity, Infinity, 50, 0, 50);
+ctx.bezierCurveTo(Infinity, Infinity, Infinity, Infinity, 0, 50);
+ctx.bezierCurveTo(Infinity, Infinity, Infinity, Infinity, Infinity, 50);
+ctx.bezierCurveTo(Infinity, Infinity, Infinity, Infinity, Infinity, Infinity);
+ctx.bezierCurveTo(Infinity, Infinity, Infinity, Infinity, 0, Infinity);
+ctx.bezierCurveTo(Infinity, Infinity, Infinity, 50, Infinity, 50);
+ctx.bezierCurveTo(Infinity, Infinity, Infinity, 50, Infinity, Infinity);
+ctx.bezierCurveTo(Infinity, Infinity, Infinity, 50, 0, Infinity);
+ctx.bezierCurveTo(Infinity, Infinity, 0, Infinity, 0, 50);
+ctx.bezierCurveTo(Infinity, Infinity, 0, Infinity, Infinity, 50);
+ctx.bezierCurveTo(Infinity, Infinity, 0, Infinity, Infinity, Infinity);
+ctx.bezierCurveTo(Infinity, Infinity, 0, Infinity, 0, Infinity);
+ctx.bezierCurveTo(Infinity, Infinity, 0, 50, Infinity, 50);
+ctx.bezierCurveTo(Infinity, Infinity, 0, 50, Infinity, Infinity);
+ctx.bezierCurveTo(Infinity, Infinity, 0, 50, 0, Infinity);
+ctx.bezierCurveTo(Infinity, 50, Infinity, 50, 0, 50);
+ctx.bezierCurveTo(Infinity, 50, Infinity, Infinity, 0, 50);
+ctx.bezierCurveTo(Infinity, 50, Infinity, Infinity, Infinity, 50);
+ctx.bezierCurveTo(Infinity, 50, Infinity, Infinity, Infinity, Infinity);
+ctx.bezierCurveTo(Infinity, 50, Infinity, Infinity, 0, Infinity);
+ctx.bezierCurveTo(Infinity, 50, Infinity, 50, Infinity, 50);
+ctx.bezierCurveTo(Infinity, 50, Infinity, 50, Infinity, Infinity);
+ctx.bezierCurveTo(Infinity, 50, Infinity, 50, 0, Infinity);
+ctx.bezierCurveTo(Infinity, 50, 0, Infinity, 0, 50);
+ctx.bezierCurveTo(Infinity, 50, 0, Infinity, Infinity, 50);
+ctx.bezierCurveTo(Infinity, 50, 0, Infinity, Infinity, Infinity);
+ctx.bezierCurveTo(Infinity, 50, 0, Infinity, 0, Infinity);
+ctx.bezierCurveTo(Infinity, 50, 0, 50, Infinity, 50);
+ctx.bezierCurveTo(Infinity, 50, 0, 50, Infinity, Infinity);
+ctx.bezierCurveTo(Infinity, 50, 0, 50, 0, Infinity);
+ctx.bezierCurveTo(0, Infinity, Infinity, 50, 0, 50);
+ctx.bezierCurveTo(0, Infinity, Infinity, Infinity, 0, 50);
+ctx.bezierCurveTo(0, Infinity, Infinity, Infinity, Infinity, 50);
+ctx.bezierCurveTo(0, Infinity, Infinity, Infinity, Infinity, Infinity);
+ctx.bezierCurveTo(0, Infinity, Infinity, Infinity, 0, Infinity);
+ctx.bezierCurveTo(0, Infinity, Infinity, 50, Infinity, 50);
+ctx.bezierCurveTo(0, Infinity, Infinity, 50, Infinity, Infinity);
+ctx.bezierCurveTo(0, Infinity, Infinity, 50, 0, Infinity);
+ctx.bezierCurveTo(0, Infinity, 0, Infinity, 0, 50);
+ctx.bezierCurveTo(0, Infinity, 0, Infinity, Infinity, 50);
+ctx.bezierCurveTo(0, Infinity, 0, Infinity, Infinity, Infinity);
+ctx.bezierCurveTo(0, Infinity, 0, Infinity, 0, Infinity);
+ctx.bezierCurveTo(0, Infinity, 0, 50, Infinity, 50);
+ctx.bezierCurveTo(0, Infinity, 0, 50, Infinity, Infinity);
+ctx.bezierCurveTo(0, Infinity, 0, 50, 0, Infinity);
+ctx.bezierCurveTo(0, 50, Infinity, Infinity, 0, 50);
+ctx.bezierCurveTo(0, 50, Infinity, Infinity, Infinity, 50);
+ctx.bezierCurveTo(0, 50, Infinity, Infinity, Infinity, Infinity);
+ctx.bezierCurveTo(0, 50, Infinity, Infinity, 0, Infinity);
+ctx.bezierCurveTo(0, 50, Infinity, 50, Infinity, 50);
+ctx.bezierCurveTo(0, 50, Infinity, 50, Infinity, Infinity);
+ctx.bezierCurveTo(0, 50, Infinity, 50, 0, Infinity);
+ctx.bezierCurveTo(0, 50, 0, Infinity, Infinity, 50);
+ctx.bezierCurveTo(0, 50, 0, Infinity, Infinity, Infinity);
+ctx.bezierCurveTo(0, 50, 0, Infinity, 0, Infinity);
+ctx.bezierCurveTo(0, 50, 0, 50, Infinity, Infinity);
+ctx.lineTo(100, 50);
+ctx.lineTo(0, 50);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 90,45, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.bezierCurveTo.scaled.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.bezierCurveTo.scaled.html
new file mode 100644
index 0000000000..2608237a6c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.bezierCurveTo.scaled.html
@@ -0,0 +1,40 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.bezierCurveTo.scaled</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.bezierCurveTo.scaled</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.scale(1000, 1000);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 0.055;
+ctx.beginPath();
+ctx.moveTo(-2, 3.1);
+ctx.bezierCurveTo(-2, -1, 2.1, -1, 2.1, 3.1);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.bezierCurveTo.scaled.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.bezierCurveTo.scaled.worker.js
new file mode 100644
index 0000000000..641cccf4b4
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.bezierCurveTo.scaled.worker.js
@@ -0,0 +1,36 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.bezierCurveTo.scaled
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.scale(1000, 1000);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 0.055;
+ctx.beginPath();
+ctx.moveTo(-2, 3.1);
+ctx.bezierCurveTo(-2, -1, 2.1, -1, 2.1, 3.1);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.bezierCurveTo.shape.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.bezierCurveTo.shape.html
new file mode 100644
index 0000000000..5f8f8daac2
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.bezierCurveTo.shape.html
@@ -0,0 +1,39 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.bezierCurveTo.shape</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.bezierCurveTo.shape</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 55;
+ctx.beginPath();
+ctx.moveTo(-2000, 3100);
+ctx.bezierCurveTo(-2000, -1000, 2100, -1000, 2100, 3100);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.bezierCurveTo.shape.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.bezierCurveTo.shape.worker.js
new file mode 100644
index 0000000000..ee42982f2f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.bezierCurveTo.shape.worker.js
@@ -0,0 +1,35 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.bezierCurveTo.shape
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 55;
+ctx.beginPath();
+ctx.moveTo(-2000, 3100);
+ctx.bezierCurveTo(-2000, -1000, 2100, -1000, 2100, 3100);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.clip.basic.1.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.clip.basic.1.html
new file mode 100644
index 0000000000..cca53f6be6
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.clip.basic.1.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.clip.basic.1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.clip.basic.1</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.beginPath();
+ctx.rect(0, 0, 100, 50);
+ctx.clip();
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.clip.basic.1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.clip.basic.1.worker.js
new file mode 100644
index 0000000000..cf5a5d3b63
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.clip.basic.1.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.clip.basic.1
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.beginPath();
+ctx.rect(0, 0, 100, 50);
+ctx.clip();
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.clip.basic.2.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.clip.basic.2.html
new file mode 100644
index 0000000000..d5ef79bf1a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.clip.basic.2.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.clip.basic.2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.clip.basic.2</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.beginPath();
+ctx.rect(-100, 0, 100, 50);
+ctx.clip();
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.clip.basic.2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.clip.basic.2.worker.js
new file mode 100644
index 0000000000..bad906d4b7
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.clip.basic.2.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.clip.basic.2
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.beginPath();
+ctx.rect(-100, 0, 100, 50);
+ctx.clip();
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.clip.empty.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.clip.empty.html
new file mode 100644
index 0000000000..d74fff0d81
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.clip.empty.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.clip.empty</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.clip.empty</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.beginPath();
+ctx.clip();
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.clip.empty.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.clip.empty.worker.js
new file mode 100644
index 0000000000..51beb6426a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.clip.empty.worker.js
@@ -0,0 +1,29 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.clip.empty
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.beginPath();
+ctx.clip();
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.clip.intersect.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.clip.intersect.html
new file mode 100644
index 0000000000..3b269ce102
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.clip.intersect.html
@@ -0,0 +1,37 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.clip.intersect</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.clip.intersect</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.beginPath();
+ctx.rect(0, 0, 50, 50);
+ctx.clip();
+ctx.beginPath();
+ctx.rect(50, 0, 50, 50)
+ctx.clip();
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.clip.intersect.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.clip.intersect.worker.js
new file mode 100644
index 0000000000..791c1bb784
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.clip.intersect.worker.js
@@ -0,0 +1,33 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.clip.intersect
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.beginPath();
+ctx.rect(0, 0, 50, 50);
+ctx.clip();
+ctx.beginPath();
+ctx.rect(50, 0, 50, 50)
+ctx.clip();
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.clip.unaffected.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.clip.unaffected.html
new file mode 100644
index 0000000000..a0ba94fb8a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.clip.unaffected.html
@@ -0,0 +1,38 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.clip.unaffected</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.clip.unaffected</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.beginPath();
+ctx.moveTo(0, 0);
+ctx.lineTo(0, 50);
+ctx.lineTo(100, 50);
+ctx.lineTo(100, 0);
+ctx.clip();
+ctx.lineTo(0, 0);
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.clip.unaffected.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.clip.unaffected.worker.js
new file mode 100644
index 0000000000..e03257021c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.clip.unaffected.worker.js
@@ -0,0 +1,34 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.clip.unaffected
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.beginPath();
+ctx.moveTo(0, 0);
+ctx.lineTo(0, 50);
+ctx.lineTo(100, 50);
+ctx.lineTo(100, 0);
+ctx.clip();
+ctx.lineTo(0, 0);
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.clip.winding.1.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.clip.winding.1.html
new file mode 100644
index 0000000000..9a20e493db
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.clip.winding.1.html
@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.clip.winding.1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.clip.winding.1</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.beginPath();
+ctx.moveTo(-10, -10);
+ctx.lineTo(110, -10);
+ctx.lineTo(110, 60);
+ctx.lineTo(-10, 60);
+ctx.lineTo(-10, -10);
+ctx.lineTo(0, 0);
+ctx.lineTo(0, 50);
+ctx.lineTo(100, 50);
+ctx.lineTo(100, 0);
+ctx.clip();
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.clip.winding.1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.clip.winding.1.worker.js
new file mode 100644
index 0000000000..02565fcc8b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.clip.winding.1.worker.js
@@ -0,0 +1,38 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.clip.winding.1
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.beginPath();
+ctx.moveTo(-10, -10);
+ctx.lineTo(110, -10);
+ctx.lineTo(110, 60);
+ctx.lineTo(-10, 60);
+ctx.lineTo(-10, -10);
+ctx.lineTo(0, 0);
+ctx.lineTo(0, 50);
+ctx.lineTo(100, 50);
+ctx.lineTo(100, 0);
+ctx.clip();
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.clip.winding.2.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.clip.winding.2.html
new file mode 100644
index 0000000000..1f223a3b38
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.clip.winding.2.html
@@ -0,0 +1,45 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.clip.winding.2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.clip.winding.2</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.beginPath();
+ctx.moveTo(-10, -10);
+ctx.lineTo(110, -10);
+ctx.lineTo(110, 60);
+ctx.lineTo(-10, 60);
+ctx.lineTo(-10, -10);
+ctx.clip();
+ctx.beginPath();
+ctx.moveTo(0, 0);
+ctx.lineTo(0, 50);
+ctx.lineTo(100, 50);
+ctx.lineTo(100, 0);
+ctx.lineTo(0, 0);
+ctx.clip();
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.clip.winding.2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.clip.winding.2.worker.js
new file mode 100644
index 0000000000..e7e8c5039d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.clip.winding.2.worker.js
@@ -0,0 +1,41 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.clip.winding.2
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.beginPath();
+ctx.moveTo(-10, -10);
+ctx.lineTo(110, -10);
+ctx.lineTo(110, 60);
+ctx.lineTo(-10, 60);
+ctx.lineTo(-10, -10);
+ctx.clip();
+ctx.beginPath();
+ctx.moveTo(0, 0);
+ctx.lineTo(0, 50);
+ctx.lineTo(100, 50);
+ctx.lineTo(100, 0);
+ctx.lineTo(0, 0);
+ctx.clip();
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.closePath.empty.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.closePath.empty.html
new file mode 100644
index 0000000000..50ea865696
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.closePath.empty.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.closePath.empty</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.closePath.empty</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.closePath();
+ctx.fillStyle = '#f00';
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.closePath.empty.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.closePath.empty.worker.js
new file mode 100644
index 0000000000..c06ce48635
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.closePath.empty.worker.js
@@ -0,0 +1,28 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.closePath.empty
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.closePath();
+ctx.fillStyle = '#f00';
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.closePath.newline.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.closePath.newline.html
new file mode 100644
index 0000000000..dca2e01b7e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.closePath.newline.html
@@ -0,0 +1,37 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.closePath.newline</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.closePath.newline</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 50;
+ctx.moveTo(-100, 25);
+ctx.lineTo(-100, -100);
+ctx.lineTo(200, -100);
+ctx.lineTo(200, 25);
+ctx.closePath();
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.closePath.newline.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.closePath.newline.worker.js
new file mode 100644
index 0000000000..5d27821f55
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.closePath.newline.worker.js
@@ -0,0 +1,33 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.closePath.newline
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 50;
+ctx.moveTo(-100, 25);
+ctx.lineTo(-100, -100);
+ctx.lineTo(200, -100);
+ctx.lineTo(200, 25);
+ctx.closePath();
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.closePath.nextpoint.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.closePath.nextpoint.html
new file mode 100644
index 0000000000..4cf02d2b64
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.closePath.nextpoint.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.closePath.nextpoint</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.closePath.nextpoint</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 50;
+ctx.moveTo(-100, 25);
+ctx.lineTo(-100, -1000);
+ctx.closePath();
+ctx.lineTo(1000, 25);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.closePath.nextpoint.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.closePath.nextpoint.worker.js
new file mode 100644
index 0000000000..8a84ce7d83
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.closePath.nextpoint.worker.js
@@ -0,0 +1,32 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.closePath.nextpoint
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 50;
+ctx.moveTo(-100, 25);
+ctx.lineTo(-100, -1000);
+ctx.closePath();
+ctx.lineTo(1000, 25);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.fill.closed.basic.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.fill.closed.basic.html
new file mode 100644
index 0000000000..72e755f7e8
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.fill.closed.basic.html
@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.fill.closed.basic</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.fill.closed.basic</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.moveTo(0, 0);
+ctx.lineTo(100, 0);
+ctx.lineTo(100, 50);
+ctx.lineTo(0, 50);
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.fill.closed.basic.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.fill.closed.basic.worker.js
new file mode 100644
index 0000000000..2c63e1ec97
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.fill.closed.basic.worker.js
@@ -0,0 +1,31 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.fill.closed.basic
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.moveTo(0, 0);
+ctx.lineTo(100, 0);
+ctx.lineTo(100, 50);
+ctx.lineTo(0, 50);
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.fill.closed.unaffected.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.fill.closed.unaffected.html
new file mode 100644
index 0000000000..9d54512539
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.fill.closed.unaffected.html
@@ -0,0 +1,38 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.fill.closed.unaffected</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.fill.closed.unaffected</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#00f';
+ctx.fillRect(0, 0, 100, 50);
+ctx.moveTo(0, 0);
+ctx.lineTo(100, 0);
+ctx.lineTo(100, 50);
+ctx.fillStyle = '#f00';
+ctx.fill();
+ctx.lineTo(0, 50);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+_assertPixel(canvas, 90,10, 0,255,0,255);
+_assertPixel(canvas, 10,40, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.fill.closed.unaffected.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.fill.closed.unaffected.worker.js
new file mode 100644
index 0000000000..6b4aa9244f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.fill.closed.unaffected.worker.js
@@ -0,0 +1,34 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.fill.closed.unaffected
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#00f';
+ctx.fillRect(0, 0, 100, 50);
+ctx.moveTo(0, 0);
+ctx.lineTo(100, 0);
+ctx.lineTo(100, 50);
+ctx.fillStyle = '#f00';
+ctx.fill();
+ctx.lineTo(0, 50);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+_assertPixel(canvas, 90,10, 0,255,0,255);
+_assertPixel(canvas, 10,40, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.fill.overlap.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.fill.overlap.html
new file mode 100644
index 0000000000..6eaf88edcd
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.fill.overlap.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.fill.overlap</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.fill.overlap</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#000';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = 'rgba(0, 255, 0, 0.5)';
+ctx.rect(0, 0, 100, 50);
+ctx.closePath();
+ctx.rect(10, 10, 80, 30);
+ctx.fill();
+_assertPixelApprox(canvas, 50,25, 0,127,0,255, 1);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.fill.overlap.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.fill.overlap.worker.js
new file mode 100644
index 0000000000..e1d64fe40b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.fill.overlap.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.fill.overlap
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#000';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = 'rgba(0, 255, 0, 0.5)';
+ctx.rect(0, 0, 100, 50);
+ctx.closePath();
+ctx.rect(10, 10, 80, 30);
+ctx.fill();
+_assertPixelApprox(canvas, 50,25, 0,127,0,255, 1);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.fill.winding.add.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.fill.winding.add.html
new file mode 100644
index 0000000000..c5f64924da
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.fill.winding.add.html
@@ -0,0 +1,40 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.fill.winding.add</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.fill.winding.add</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.moveTo(-10, -10);
+ctx.lineTo(110, -10);
+ctx.lineTo(110, 60);
+ctx.lineTo(-10, 60);
+ctx.lineTo(-10, -10);
+ctx.lineTo(0, 0);
+ctx.lineTo(100, 0);
+ctx.lineTo(100, 50);
+ctx.lineTo(0, 50);
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.fill.winding.add.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.fill.winding.add.worker.js
new file mode 100644
index 0000000000..b40e170623
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.fill.winding.add.worker.js
@@ -0,0 +1,36 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.fill.winding.add
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.moveTo(-10, -10);
+ctx.lineTo(110, -10);
+ctx.lineTo(110, 60);
+ctx.lineTo(-10, 60);
+ctx.lineTo(-10, -10);
+ctx.lineTo(0, 0);
+ctx.lineTo(100, 0);
+ctx.lineTo(100, 50);
+ctx.lineTo(0, 50);
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.fill.winding.subtract.1.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.fill.winding.subtract.1.html
new file mode 100644
index 0000000000..4f553f2bc3
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.fill.winding.subtract.1.html
@@ -0,0 +1,40 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.fill.winding.subtract.1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.fill.winding.subtract.1</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.moveTo(-10, -10);
+ctx.lineTo(110, -10);
+ctx.lineTo(110, 60);
+ctx.lineTo(-10, 60);
+ctx.lineTo(-10, -10);
+ctx.lineTo(0, 0);
+ctx.lineTo(0, 50);
+ctx.lineTo(100, 50);
+ctx.lineTo(100, 0);
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.fill.winding.subtract.1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.fill.winding.subtract.1.worker.js
new file mode 100644
index 0000000000..a820915413
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.fill.winding.subtract.1.worker.js
@@ -0,0 +1,36 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.fill.winding.subtract.1
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.moveTo(-10, -10);
+ctx.lineTo(110, -10);
+ctx.lineTo(110, 60);
+ctx.lineTo(-10, 60);
+ctx.lineTo(-10, -10);
+ctx.lineTo(0, 0);
+ctx.lineTo(0, 50);
+ctx.lineTo(100, 50);
+ctx.lineTo(100, 0);
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.fill.winding.subtract.2.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.fill.winding.subtract.2.html
new file mode 100644
index 0000000000..cf1fcaa2d4
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.fill.winding.subtract.2.html
@@ -0,0 +1,39 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.fill.winding.subtract.2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.fill.winding.subtract.2</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.moveTo(-10, -10);
+ctx.lineTo(110, -10);
+ctx.lineTo(110, 60);
+ctx.lineTo(-10, 60);
+ctx.moveTo(0, 0);
+ctx.lineTo(0, 50);
+ctx.lineTo(100, 50);
+ctx.lineTo(100, 0);
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.fill.winding.subtract.2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.fill.winding.subtract.2.worker.js
new file mode 100644
index 0000000000..2c83a41ae8
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.fill.winding.subtract.2.worker.js
@@ -0,0 +1,35 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.fill.winding.subtract.2
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.moveTo(-10, -10);
+ctx.lineTo(110, -10);
+ctx.lineTo(110, 60);
+ctx.lineTo(-10, 60);
+ctx.moveTo(0, 0);
+ctx.lineTo(0, 50);
+ctx.lineTo(100, 50);
+ctx.lineTo(100, 0);
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.fill.winding.subtract.3.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.fill.winding.subtract.3.html
new file mode 100644
index 0000000000..ffcbfe2518
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.fill.winding.subtract.3.html
@@ -0,0 +1,45 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.fill.winding.subtract.3</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.fill.winding.subtract.3</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.moveTo(-10, -10);
+ctx.lineTo(110, -10);
+ctx.lineTo(110, 60);
+ctx.lineTo(-10, 60);
+ctx.lineTo(-10, -10);
+ctx.lineTo(-20, -20);
+ctx.lineTo(120, -20);
+ctx.lineTo(120, 70);
+ctx.lineTo(-20, 70);
+ctx.lineTo(-20, -20);
+ctx.lineTo(0, 0);
+ctx.lineTo(0, 50);
+ctx.lineTo(100, 50);
+ctx.lineTo(100, 0);
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.fill.winding.subtract.3.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.fill.winding.subtract.3.worker.js
new file mode 100644
index 0000000000..ca5510abf2
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.fill.winding.subtract.3.worker.js
@@ -0,0 +1,41 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.fill.winding.subtract.3
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.moveTo(-10, -10);
+ctx.lineTo(110, -10);
+ctx.lineTo(110, 60);
+ctx.lineTo(-10, 60);
+ctx.lineTo(-10, -10);
+ctx.lineTo(-20, -20);
+ctx.lineTo(120, -20);
+ctx.lineTo(120, 70);
+ctx.lineTo(-20, 70);
+ctx.lineTo(-20, -20);
+ctx.lineTo(0, 0);
+ctx.lineTo(0, 50);
+ctx.lineTo(100, 50);
+ctx.lineTo(100, 0);
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.initial.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.initial.html
new file mode 100644
index 0000000000..35c96cdab5
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.initial.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.initial</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.initial</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.closePath();
+ctx.fillStyle = '#f00';
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.initial.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.initial.worker.js
new file mode 100644
index 0000000000..de8597fbc3
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.initial.worker.js
@@ -0,0 +1,28 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.initial
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.closePath();
+ctx.fillStyle = '#f00';
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.arc.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.arc.html
new file mode 100644
index 0000000000..fe12f9457a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.arc.html
@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.isPointInPath.arc</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.isPointInPath.arc</h1>
+<p class="desc">isPointInPath() works on arcs</p>
+
+
+<script>
+var t = async_test("isPointInPath() works on arcs");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.arc(50, 25, 10, 0, Math.PI, false);
+_assertSame(ctx.isPointInPath(50, 10), false, "ctx.isPointInPath(50, 10)", "false");
+_assertSame(ctx.isPointInPath(50, 20), false, "ctx.isPointInPath(50, 20)", "false");
+_assertSame(ctx.isPointInPath(50, 30), true, "ctx.isPointInPath(50, 30)", "true");
+_assertSame(ctx.isPointInPath(50, 40), false, "ctx.isPointInPath(50, 40)", "false");
+_assertSame(ctx.isPointInPath(30, 20), false, "ctx.isPointInPath(30, 20)", "false");
+_assertSame(ctx.isPointInPath(70, 20), false, "ctx.isPointInPath(70, 20)", "false");
+_assertSame(ctx.isPointInPath(30, 30), false, "ctx.isPointInPath(30, 30)", "false");
+_assertSame(ctx.isPointInPath(70, 30), false, "ctx.isPointInPath(70, 30)", "false");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.arc.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.arc.worker.js
new file mode 100644
index 0000000000..2803e39325
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.arc.worker.js
@@ -0,0 +1,31 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.isPointInPath.arc
+// Description:isPointInPath() works on arcs
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("isPointInPath() works on arcs");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.arc(50, 25, 10, 0, Math.PI, false);
+_assertSame(ctx.isPointInPath(50, 10), false, "ctx.isPointInPath(50, 10)", "false");
+_assertSame(ctx.isPointInPath(50, 20), false, "ctx.isPointInPath(50, 20)", "false");
+_assertSame(ctx.isPointInPath(50, 30), true, "ctx.isPointInPath(50, 30)", "true");
+_assertSame(ctx.isPointInPath(50, 40), false, "ctx.isPointInPath(50, 40)", "false");
+_assertSame(ctx.isPointInPath(30, 20), false, "ctx.isPointInPath(30, 20)", "false");
+_assertSame(ctx.isPointInPath(70, 20), false, "ctx.isPointInPath(70, 20)", "false");
+_assertSame(ctx.isPointInPath(30, 30), false, "ctx.isPointInPath(30, 30)", "false");
+_assertSame(ctx.isPointInPath(70, 30), false, "ctx.isPointInPath(70, 30)", "false");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.basic.1.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.basic.1.html
new file mode 100644
index 0000000000..3cd24f5487
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.basic.1.html
@@ -0,0 +1,29 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.isPointInPath.basic.1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.isPointInPath.basic.1</h1>
+<p class="desc">isPointInPath() detects whether the point is inside the path</p>
+
+
+<script>
+var t = async_test("isPointInPath() detects whether the point is inside the path");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.rect(0, 0, 20, 20);
+_assertSame(ctx.isPointInPath(10, 10), true, "ctx.isPointInPath(10, 10)", "true");
+_assertSame(ctx.isPointInPath(30, 10), false, "ctx.isPointInPath(30, 10)", "false");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.basic.1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.basic.1.worker.js
new file mode 100644
index 0000000000..93dd86a5f7
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.basic.1.worker.js
@@ -0,0 +1,25 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.isPointInPath.basic.1
+// Description:isPointInPath() detects whether the point is inside the path
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("isPointInPath() detects whether the point is inside the path");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.rect(0, 0, 20, 20);
+_assertSame(ctx.isPointInPath(10, 10), true, "ctx.isPointInPath(10, 10)", "true");
+_assertSame(ctx.isPointInPath(30, 10), false, "ctx.isPointInPath(30, 10)", "false");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.basic.2.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.basic.2.html
new file mode 100644
index 0000000000..42381d3f55
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.basic.2.html
@@ -0,0 +1,29 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.isPointInPath.basic.2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.isPointInPath.basic.2</h1>
+<p class="desc">isPointInPath() detects whether the point is inside the path</p>
+
+
+<script>
+var t = async_test("isPointInPath() detects whether the point is inside the path");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.rect(20, 0, 20, 20);
+_assertSame(ctx.isPointInPath(10, 10), false, "ctx.isPointInPath(10, 10)", "false");
+_assertSame(ctx.isPointInPath(30, 10), true, "ctx.isPointInPath(30, 10)", "true");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.basic.2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.basic.2.worker.js
new file mode 100644
index 0000000000..7dbc5fc6fb
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.basic.2.worker.js
@@ -0,0 +1,25 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.isPointInPath.basic.2
+// Description:isPointInPath() detects whether the point is inside the path
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("isPointInPath() detects whether the point is inside the path");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.rect(20, 0, 20, 20);
+_assertSame(ctx.isPointInPath(10, 10), false, "ctx.isPointInPath(10, 10)", "false");
+_assertSame(ctx.isPointInPath(30, 10), true, "ctx.isPointInPath(30, 10)", "true");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.bezier.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.bezier.html
new file mode 100644
index 0000000000..f336fe4c7f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.bezier.html
@@ -0,0 +1,48 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.isPointInPath.bezier</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.isPointInPath.bezier</h1>
+<p class="desc">isPointInPath() works on Bezier curves</p>
+
+
+<script>
+var t = async_test("isPointInPath() works on Bezier curves");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.moveTo(25, 25);
+ctx.bezierCurveTo(50, -50, 50, 100, 75, 25);
+_assertSame(ctx.isPointInPath(25, 20), false, "ctx.isPointInPath(25, 20)", "false");
+_assertSame(ctx.isPointInPath(25, 30), false, "ctx.isPointInPath(25, 30)", "false");
+_assertSame(ctx.isPointInPath(30, 20), true, "ctx.isPointInPath(30, 20)", "true");
+_assertSame(ctx.isPointInPath(30, 30), false, "ctx.isPointInPath(30, 30)", "false");
+_assertSame(ctx.isPointInPath(40, 2), false, "ctx.isPointInPath(40, 2)", "false");
+_assertSame(ctx.isPointInPath(40, 20), true, "ctx.isPointInPath(40, 20)", "true");
+_assertSame(ctx.isPointInPath(40, 30), false, "ctx.isPointInPath(40, 30)", "false");
+_assertSame(ctx.isPointInPath(40, 47), false, "ctx.isPointInPath(40, 47)", "false");
+_assertSame(ctx.isPointInPath(45, 20), true, "ctx.isPointInPath(45, 20)", "true");
+_assertSame(ctx.isPointInPath(45, 30), false, "ctx.isPointInPath(45, 30)", "false");
+_assertSame(ctx.isPointInPath(55, 20), false, "ctx.isPointInPath(55, 20)", "false");
+_assertSame(ctx.isPointInPath(55, 30), true, "ctx.isPointInPath(55, 30)", "true");
+_assertSame(ctx.isPointInPath(60, 2), false, "ctx.isPointInPath(60, 2)", "false");
+_assertSame(ctx.isPointInPath(60, 20), false, "ctx.isPointInPath(60, 20)", "false");
+_assertSame(ctx.isPointInPath(60, 30), true, "ctx.isPointInPath(60, 30)", "true");
+_assertSame(ctx.isPointInPath(60, 47), false, "ctx.isPointInPath(60, 47)", "false");
+_assertSame(ctx.isPointInPath(70, 20), false, "ctx.isPointInPath(70, 20)", "false");
+_assertSame(ctx.isPointInPath(70, 30), true, "ctx.isPointInPath(70, 30)", "true");
+_assertSame(ctx.isPointInPath(75, 20), false, "ctx.isPointInPath(75, 20)", "false");
+_assertSame(ctx.isPointInPath(75, 30), false, "ctx.isPointInPath(75, 30)", "false");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.bezier.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.bezier.worker.js
new file mode 100644
index 0000000000..6017efc286
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.bezier.worker.js
@@ -0,0 +1,44 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.isPointInPath.bezier
+// Description:isPointInPath() works on Bezier curves
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("isPointInPath() works on Bezier curves");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.moveTo(25, 25);
+ctx.bezierCurveTo(50, -50, 50, 100, 75, 25);
+_assertSame(ctx.isPointInPath(25, 20), false, "ctx.isPointInPath(25, 20)", "false");
+_assertSame(ctx.isPointInPath(25, 30), false, "ctx.isPointInPath(25, 30)", "false");
+_assertSame(ctx.isPointInPath(30, 20), true, "ctx.isPointInPath(30, 20)", "true");
+_assertSame(ctx.isPointInPath(30, 30), false, "ctx.isPointInPath(30, 30)", "false");
+_assertSame(ctx.isPointInPath(40, 2), false, "ctx.isPointInPath(40, 2)", "false");
+_assertSame(ctx.isPointInPath(40, 20), true, "ctx.isPointInPath(40, 20)", "true");
+_assertSame(ctx.isPointInPath(40, 30), false, "ctx.isPointInPath(40, 30)", "false");
+_assertSame(ctx.isPointInPath(40, 47), false, "ctx.isPointInPath(40, 47)", "false");
+_assertSame(ctx.isPointInPath(45, 20), true, "ctx.isPointInPath(45, 20)", "true");
+_assertSame(ctx.isPointInPath(45, 30), false, "ctx.isPointInPath(45, 30)", "false");
+_assertSame(ctx.isPointInPath(55, 20), false, "ctx.isPointInPath(55, 20)", "false");
+_assertSame(ctx.isPointInPath(55, 30), true, "ctx.isPointInPath(55, 30)", "true");
+_assertSame(ctx.isPointInPath(60, 2), false, "ctx.isPointInPath(60, 2)", "false");
+_assertSame(ctx.isPointInPath(60, 20), false, "ctx.isPointInPath(60, 20)", "false");
+_assertSame(ctx.isPointInPath(60, 30), true, "ctx.isPointInPath(60, 30)", "true");
+_assertSame(ctx.isPointInPath(60, 47), false, "ctx.isPointInPath(60, 47)", "false");
+_assertSame(ctx.isPointInPath(70, 20), false, "ctx.isPointInPath(70, 20)", "false");
+_assertSame(ctx.isPointInPath(70, 30), true, "ctx.isPointInPath(70, 30)", "true");
+_assertSame(ctx.isPointInPath(75, 20), false, "ctx.isPointInPath(75, 20)", "false");
+_assertSame(ctx.isPointInPath(75, 30), false, "ctx.isPointInPath(75, 30)", "false");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.bigarc.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.bigarc.html
new file mode 100644
index 0000000000..2e6e78fedb
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.bigarc.html
@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.isPointInPath.bigarc</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.isPointInPath.bigarc</h1>
+<p class="desc">isPointInPath() works on unclosed arcs larger than 2pi</p>
+
+
+<script>
+var t = async_test("isPointInPath() works on unclosed arcs larger than 2pi");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.arc(50, 25, 10, 0, 7, false);
+_assertSame(ctx.isPointInPath(50, 10), false, "ctx.isPointInPath(50, 10)", "false");
+_assertSame(ctx.isPointInPath(50, 20), true, "ctx.isPointInPath(50, 20)", "true");
+_assertSame(ctx.isPointInPath(50, 30), true, "ctx.isPointInPath(50, 30)", "true");
+_assertSame(ctx.isPointInPath(50, 40), false, "ctx.isPointInPath(50, 40)", "false");
+_assertSame(ctx.isPointInPath(30, 20), false, "ctx.isPointInPath(30, 20)", "false");
+_assertSame(ctx.isPointInPath(70, 20), false, "ctx.isPointInPath(70, 20)", "false");
+_assertSame(ctx.isPointInPath(30, 30), false, "ctx.isPointInPath(30, 30)", "false");
+_assertSame(ctx.isPointInPath(70, 30), false, "ctx.isPointInPath(70, 30)", "false");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.bigarc.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.bigarc.worker.js
new file mode 100644
index 0000000000..1ee0010215
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.bigarc.worker.js
@@ -0,0 +1,31 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.isPointInPath.bigarc
+// Description:isPointInPath() works on unclosed arcs larger than 2pi
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("isPointInPath() works on unclosed arcs larger than 2pi");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.arc(50, 25, 10, 0, 7, false);
+_assertSame(ctx.isPointInPath(50, 10), false, "ctx.isPointInPath(50, 10)", "false");
+_assertSame(ctx.isPointInPath(50, 20), true, "ctx.isPointInPath(50, 20)", "true");
+_assertSame(ctx.isPointInPath(50, 30), true, "ctx.isPointInPath(50, 30)", "true");
+_assertSame(ctx.isPointInPath(50, 40), false, "ctx.isPointInPath(50, 40)", "false");
+_assertSame(ctx.isPointInPath(30, 20), false, "ctx.isPointInPath(30, 20)", "false");
+_assertSame(ctx.isPointInPath(70, 20), false, "ctx.isPointInPath(70, 20)", "false");
+_assertSame(ctx.isPointInPath(30, 30), false, "ctx.isPointInPath(30, 30)", "false");
+_assertSame(ctx.isPointInPath(70, 30), false, "ctx.isPointInPath(70, 30)", "false");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.edge.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.edge.html
new file mode 100644
index 0000000000..bcd4eaefd9
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.edge.html
@@ -0,0 +1,39 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.isPointInPath.edge</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.isPointInPath.edge</h1>
+<p class="desc">isPointInPath() counts points on the path as being inside</p>
+
+
+<script>
+var t = async_test("isPointInPath() counts points on the path as being inside");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.rect(0, 0, 20, 20);
+_assertSame(ctx.isPointInPath(0, 0), true, "ctx.isPointInPath(0, 0)", "true");
+_assertSame(ctx.isPointInPath(10, 0), true, "ctx.isPointInPath(10, 0)", "true");
+_assertSame(ctx.isPointInPath(20, 0), true, "ctx.isPointInPath(20, 0)", "true");
+_assertSame(ctx.isPointInPath(20, 10), true, "ctx.isPointInPath(20, 10)", "true");
+_assertSame(ctx.isPointInPath(20, 20), true, "ctx.isPointInPath(20, 20)", "true");
+_assertSame(ctx.isPointInPath(10, 20), true, "ctx.isPointInPath(10, 20)", "true");
+_assertSame(ctx.isPointInPath(0, 20), true, "ctx.isPointInPath(0, 20)", "true");
+_assertSame(ctx.isPointInPath(0, 10), true, "ctx.isPointInPath(0, 10)", "true");
+_assertSame(ctx.isPointInPath(10, -0.01), false, "ctx.isPointInPath(10, -0.01)", "false");
+_assertSame(ctx.isPointInPath(10, 20.01), false, "ctx.isPointInPath(10, 20.01)", "false");
+_assertSame(ctx.isPointInPath(-0.01, 10), false, "ctx.isPointInPath(-0.01, 10)", "false");
+_assertSame(ctx.isPointInPath(20.01, 10), false, "ctx.isPointInPath(20.01, 10)", "false");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.edge.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.edge.worker.js
new file mode 100644
index 0000000000..21222ebc4f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.edge.worker.js
@@ -0,0 +1,35 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.isPointInPath.edge
+// Description:isPointInPath() counts points on the path as being inside
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("isPointInPath() counts points on the path as being inside");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.rect(0, 0, 20, 20);
+_assertSame(ctx.isPointInPath(0, 0), true, "ctx.isPointInPath(0, 0)", "true");
+_assertSame(ctx.isPointInPath(10, 0), true, "ctx.isPointInPath(10, 0)", "true");
+_assertSame(ctx.isPointInPath(20, 0), true, "ctx.isPointInPath(20, 0)", "true");
+_assertSame(ctx.isPointInPath(20, 10), true, "ctx.isPointInPath(20, 10)", "true");
+_assertSame(ctx.isPointInPath(20, 20), true, "ctx.isPointInPath(20, 20)", "true");
+_assertSame(ctx.isPointInPath(10, 20), true, "ctx.isPointInPath(10, 20)", "true");
+_assertSame(ctx.isPointInPath(0, 20), true, "ctx.isPointInPath(0, 20)", "true");
+_assertSame(ctx.isPointInPath(0, 10), true, "ctx.isPointInPath(0, 10)", "true");
+_assertSame(ctx.isPointInPath(10, -0.01), false, "ctx.isPointInPath(10, -0.01)", "false");
+_assertSame(ctx.isPointInPath(10, 20.01), false, "ctx.isPointInPath(10, 20.01)", "false");
+_assertSame(ctx.isPointInPath(-0.01, 10), false, "ctx.isPointInPath(-0.01, 10)", "false");
+_assertSame(ctx.isPointInPath(20.01, 10), false, "ctx.isPointInPath(20.01, 10)", "false");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.empty.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.empty.html
new file mode 100644
index 0000000000..9a875097b0
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.empty.html
@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.isPointInPath.empty</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.isPointInPath.empty</h1>
+<p class="desc">isPointInPath() works when there is no path</p>
+
+
+<script>
+var t = async_test("isPointInPath() works when there is no path");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertSame(ctx.isPointInPath(0, 0), false, "ctx.isPointInPath(0, 0)", "false");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.empty.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.empty.worker.js
new file mode 100644
index 0000000000..e449ee2e69
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.empty.worker.js
@@ -0,0 +1,23 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.isPointInPath.empty
+// Description:isPointInPath() works when there is no path
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("isPointInPath() works when there is no path");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertSame(ctx.isPointInPath(0, 0), false, "ctx.isPointInPath(0, 0)", "false");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.nonfinite.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.nonfinite.html
new file mode 100644
index 0000000000..8dc4c1df3a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.nonfinite.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.isPointInPath.nonfinite</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.isPointInPath.nonfinite</h1>
+<p class="desc">isPointInPath() returns false for non-finite arguments</p>
+
+
+<script>
+var t = async_test("isPointInPath() returns false for non-finite arguments");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.rect(-100, -50, 200, 100);
+_assertSame(ctx.isPointInPath(Infinity, 0), false, "ctx.isPointInPath(Infinity, 0)", "false");
+_assertSame(ctx.isPointInPath(-Infinity, 0), false, "ctx.isPointInPath(-Infinity, 0)", "false");
+_assertSame(ctx.isPointInPath(NaN, 0), false, "ctx.isPointInPath(NaN, 0)", "false");
+_assertSame(ctx.isPointInPath(0, Infinity), false, "ctx.isPointInPath(0, Infinity)", "false");
+_assertSame(ctx.isPointInPath(0, -Infinity), false, "ctx.isPointInPath(0, -Infinity)", "false");
+_assertSame(ctx.isPointInPath(0, NaN), false, "ctx.isPointInPath(0, NaN)", "false");
+_assertSame(ctx.isPointInPath(NaN, NaN), false, "ctx.isPointInPath(NaN, NaN)", "false");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.nonfinite.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.nonfinite.worker.js
new file mode 100644
index 0000000000..70a4ece162
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.nonfinite.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.isPointInPath.nonfinite
+// Description:isPointInPath() returns false for non-finite arguments
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("isPointInPath() returns false for non-finite arguments");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.rect(-100, -50, 200, 100);
+_assertSame(ctx.isPointInPath(Infinity, 0), false, "ctx.isPointInPath(Infinity, 0)", "false");
+_assertSame(ctx.isPointInPath(-Infinity, 0), false, "ctx.isPointInPath(-Infinity, 0)", "false");
+_assertSame(ctx.isPointInPath(NaN, 0), false, "ctx.isPointInPath(NaN, 0)", "false");
+_assertSame(ctx.isPointInPath(0, Infinity), false, "ctx.isPointInPath(0, Infinity)", "false");
+_assertSame(ctx.isPointInPath(0, -Infinity), false, "ctx.isPointInPath(0, -Infinity)", "false");
+_assertSame(ctx.isPointInPath(0, NaN), false, "ctx.isPointInPath(0, NaN)", "false");
+_assertSame(ctx.isPointInPath(NaN, NaN), false, "ctx.isPointInPath(NaN, NaN)", "false");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.outside.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.outside.html
new file mode 100644
index 0000000000..d1a1d86a02
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.outside.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.isPointInPath.outside</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.isPointInPath.outside</h1>
+<p class="desc">isPointInPath() works on paths outside the canvas</p>
+
+
+<script>
+var t = async_test("isPointInPath() works on paths outside the canvas");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.rect(0, -100, 20, 20);
+ctx.rect(20, -10, 20, 20);
+_assertSame(ctx.isPointInPath(10, -110), false, "ctx.isPointInPath(10, -110)", "false");
+_assertSame(ctx.isPointInPath(10, -90), true, "ctx.isPointInPath(10, -90)", "true");
+_assertSame(ctx.isPointInPath(10, -70), false, "ctx.isPointInPath(10, -70)", "false");
+_assertSame(ctx.isPointInPath(30, -20), false, "ctx.isPointInPath(30, -20)", "false");
+_assertSame(ctx.isPointInPath(30, 0), true, "ctx.isPointInPath(30, 0)", "true");
+_assertSame(ctx.isPointInPath(30, 20), false, "ctx.isPointInPath(30, 20)", "false");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.outside.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.outside.worker.js
new file mode 100644
index 0000000000..6d07105046
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.outside.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.isPointInPath.outside
+// Description:isPointInPath() works on paths outside the canvas
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("isPointInPath() works on paths outside the canvas");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.rect(0, -100, 20, 20);
+ctx.rect(20, -10, 20, 20);
+_assertSame(ctx.isPointInPath(10, -110), false, "ctx.isPointInPath(10, -110)", "false");
+_assertSame(ctx.isPointInPath(10, -90), true, "ctx.isPointInPath(10, -90)", "true");
+_assertSame(ctx.isPointInPath(10, -70), false, "ctx.isPointInPath(10, -70)", "false");
+_assertSame(ctx.isPointInPath(30, -20), false, "ctx.isPointInPath(30, -20)", "false");
+_assertSame(ctx.isPointInPath(30, 0), true, "ctx.isPointInPath(30, 0)", "true");
+_assertSame(ctx.isPointInPath(30, 20), false, "ctx.isPointInPath(30, 20)", "false");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.subpath.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.subpath.html
new file mode 100644
index 0000000000..b0ea1f9a0f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.subpath.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.isPointInPath.subpath</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.isPointInPath.subpath</h1>
+<p class="desc">isPointInPath() uses the current path, not just the subpath</p>
+
+
+<script>
+var t = async_test("isPointInPath() uses the current path, not just the subpath");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.rect(0, 0, 20, 20);
+ctx.beginPath();
+ctx.rect(20, 0, 20, 20);
+ctx.closePath();
+ctx.rect(40, 0, 20, 20);
+_assertSame(ctx.isPointInPath(10, 10), false, "ctx.isPointInPath(10, 10)", "false");
+_assertSame(ctx.isPointInPath(30, 10), true, "ctx.isPointInPath(30, 10)", "true");
+_assertSame(ctx.isPointInPath(50, 10), true, "ctx.isPointInPath(50, 10)", "true");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.subpath.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.subpath.worker.js
new file mode 100644
index 0000000000..4a82fcc08a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.subpath.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.isPointInPath.subpath
+// Description:isPointInPath() uses the current path, not just the subpath
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("isPointInPath() uses the current path, not just the subpath");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.rect(0, 0, 20, 20);
+ctx.beginPath();
+ctx.rect(20, 0, 20, 20);
+ctx.closePath();
+ctx.rect(40, 0, 20, 20);
+_assertSame(ctx.isPointInPath(10, 10), false, "ctx.isPointInPath(10, 10)", "false");
+_assertSame(ctx.isPointInPath(30, 10), true, "ctx.isPointInPath(30, 10)", "true");
+_assertSame(ctx.isPointInPath(50, 10), true, "ctx.isPointInPath(50, 10)", "true");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.transform.1.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.transform.1.html
new file mode 100644
index 0000000000..9b7b2e5ee0
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.transform.1.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.isPointInPath.transform.1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.isPointInPath.transform.1</h1>
+<p class="desc">isPointInPath() handles transformations correctly</p>
+
+
+<script>
+var t = async_test("isPointInPath() handles transformations correctly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.translate(50, 0);
+ctx.rect(0, 0, 20, 20);
+_assertSame(ctx.isPointInPath(-40, 10), false, "ctx.isPointInPath(-40, 10)", "false");
+_assertSame(ctx.isPointInPath(10, 10), false, "ctx.isPointInPath(10, 10)", "false");
+_assertSame(ctx.isPointInPath(49, 10), false, "ctx.isPointInPath(49, 10)", "false");
+_assertSame(ctx.isPointInPath(51, 10), true, "ctx.isPointInPath(51, 10)", "true");
+_assertSame(ctx.isPointInPath(69, 10), true, "ctx.isPointInPath(69, 10)", "true");
+_assertSame(ctx.isPointInPath(71, 10), false, "ctx.isPointInPath(71, 10)", "false");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.transform.1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.transform.1.worker.js
new file mode 100644
index 0000000000..2fafbe910e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.transform.1.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.isPointInPath.transform.1
+// Description:isPointInPath() handles transformations correctly
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("isPointInPath() handles transformations correctly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.translate(50, 0);
+ctx.rect(0, 0, 20, 20);
+_assertSame(ctx.isPointInPath(-40, 10), false, "ctx.isPointInPath(-40, 10)", "false");
+_assertSame(ctx.isPointInPath(10, 10), false, "ctx.isPointInPath(10, 10)", "false");
+_assertSame(ctx.isPointInPath(49, 10), false, "ctx.isPointInPath(49, 10)", "false");
+_assertSame(ctx.isPointInPath(51, 10), true, "ctx.isPointInPath(51, 10)", "true");
+_assertSame(ctx.isPointInPath(69, 10), true, "ctx.isPointInPath(69, 10)", "true");
+_assertSame(ctx.isPointInPath(71, 10), false, "ctx.isPointInPath(71, 10)", "false");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.transform.2.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.transform.2.html
new file mode 100644
index 0000000000..45b884f2b5
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.transform.2.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.isPointInPath.transform.2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.isPointInPath.transform.2</h1>
+<p class="desc">isPointInPath() handles transformations correctly</p>
+
+
+<script>
+var t = async_test("isPointInPath() handles transformations correctly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.rect(50, 0, 20, 20);
+ctx.translate(50, 0);
+_assertSame(ctx.isPointInPath(-40, 10), false, "ctx.isPointInPath(-40, 10)", "false");
+_assertSame(ctx.isPointInPath(10, 10), false, "ctx.isPointInPath(10, 10)", "false");
+_assertSame(ctx.isPointInPath(49, 10), false, "ctx.isPointInPath(49, 10)", "false");
+_assertSame(ctx.isPointInPath(51, 10), true, "ctx.isPointInPath(51, 10)", "true");
+_assertSame(ctx.isPointInPath(69, 10), true, "ctx.isPointInPath(69, 10)", "true");
+_assertSame(ctx.isPointInPath(71, 10), false, "ctx.isPointInPath(71, 10)", "false");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.transform.2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.transform.2.worker.js
new file mode 100644
index 0000000000..3f37e62057
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.transform.2.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.isPointInPath.transform.2
+// Description:isPointInPath() handles transformations correctly
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("isPointInPath() handles transformations correctly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.rect(50, 0, 20, 20);
+ctx.translate(50, 0);
+_assertSame(ctx.isPointInPath(-40, 10), false, "ctx.isPointInPath(-40, 10)", "false");
+_assertSame(ctx.isPointInPath(10, 10), false, "ctx.isPointInPath(10, 10)", "false");
+_assertSame(ctx.isPointInPath(49, 10), false, "ctx.isPointInPath(49, 10)", "false");
+_assertSame(ctx.isPointInPath(51, 10), true, "ctx.isPointInPath(51, 10)", "true");
+_assertSame(ctx.isPointInPath(69, 10), true, "ctx.isPointInPath(69, 10)", "true");
+_assertSame(ctx.isPointInPath(71, 10), false, "ctx.isPointInPath(71, 10)", "false");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.transform.3.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.transform.3.html
new file mode 100644
index 0000000000..923da480e8
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.transform.3.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.isPointInPath.transform.3</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.isPointInPath.transform.3</h1>
+<p class="desc">isPointInPath() handles transformations correctly</p>
+
+
+<script>
+var t = async_test("isPointInPath() handles transformations correctly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.scale(-1, 1);
+ctx.rect(-70, 0, 20, 20);
+_assertSame(ctx.isPointInPath(-40, 10), false, "ctx.isPointInPath(-40, 10)", "false");
+_assertSame(ctx.isPointInPath(10, 10), false, "ctx.isPointInPath(10, 10)", "false");
+_assertSame(ctx.isPointInPath(49, 10), false, "ctx.isPointInPath(49, 10)", "false");
+_assertSame(ctx.isPointInPath(51, 10), true, "ctx.isPointInPath(51, 10)", "true");
+_assertSame(ctx.isPointInPath(69, 10), true, "ctx.isPointInPath(69, 10)", "true");
+_assertSame(ctx.isPointInPath(71, 10), false, "ctx.isPointInPath(71, 10)", "false");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.transform.3.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.transform.3.worker.js
new file mode 100644
index 0000000000..172d0a72a4
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.transform.3.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.isPointInPath.transform.3
+// Description:isPointInPath() handles transformations correctly
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("isPointInPath() handles transformations correctly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.scale(-1, 1);
+ctx.rect(-70, 0, 20, 20);
+_assertSame(ctx.isPointInPath(-40, 10), false, "ctx.isPointInPath(-40, 10)", "false");
+_assertSame(ctx.isPointInPath(10, 10), false, "ctx.isPointInPath(10, 10)", "false");
+_assertSame(ctx.isPointInPath(49, 10), false, "ctx.isPointInPath(49, 10)", "false");
+_assertSame(ctx.isPointInPath(51, 10), true, "ctx.isPointInPath(51, 10)", "true");
+_assertSame(ctx.isPointInPath(69, 10), true, "ctx.isPointInPath(69, 10)", "true");
+_assertSame(ctx.isPointInPath(71, 10), false, "ctx.isPointInPath(71, 10)", "false");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.transform.4.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.transform.4.html
new file mode 100644
index 0000000000..0f87cc2b21
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.transform.4.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.isPointInPath.transform.4</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.isPointInPath.transform.4</h1>
+<p class="desc">isPointInPath() handles transformations correctly</p>
+
+
+<script>
+var t = async_test("isPointInPath() handles transformations correctly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.translate(50, 0);
+ctx.rect(50, 0, 20, 20);
+ctx.translate(0, 50);
+_assertSame(ctx.isPointInPath(60, 10), false, "ctx.isPointInPath(60, 10)", "false");
+_assertSame(ctx.isPointInPath(110, 10), true, "ctx.isPointInPath(110, 10)", "true");
+_assertSame(ctx.isPointInPath(110, 60), false, "ctx.isPointInPath(110, 60)", "false");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.transform.4.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.transform.4.worker.js
new file mode 100644
index 0000000000..993148110a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.transform.4.worker.js
@@ -0,0 +1,28 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.isPointInPath.transform.4
+// Description:isPointInPath() handles transformations correctly
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("isPointInPath() handles transformations correctly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.translate(50, 0);
+ctx.rect(50, 0, 20, 20);
+ctx.translate(0, 50);
+_assertSame(ctx.isPointInPath(60, 10), false, "ctx.isPointInPath(60, 10)", "false");
+_assertSame(ctx.isPointInPath(110, 10), true, "ctx.isPointInPath(110, 10)", "true");
+_assertSame(ctx.isPointInPath(110, 60), false, "ctx.isPointInPath(110, 60)", "false");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.unclosed.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.unclosed.html
new file mode 100644
index 0000000000..098370f0f7
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.unclosed.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.isPointInPath.unclosed</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.isPointInPath.unclosed</h1>
+<p class="desc">isPointInPath() works on unclosed subpaths</p>
+
+
+<script>
+var t = async_test("isPointInPath() works on unclosed subpaths");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.moveTo(0, 0);
+ctx.lineTo(20, 0);
+ctx.lineTo(20, 20);
+ctx.lineTo(0, 20);
+_assertSame(ctx.isPointInPath(10, 10), true, "ctx.isPointInPath(10, 10)", "true");
+_assertSame(ctx.isPointInPath(30, 10), false, "ctx.isPointInPath(30, 10)", "false");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.unclosed.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.unclosed.worker.js
new file mode 100644
index 0000000000..ad4ac8781b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.unclosed.worker.js
@@ -0,0 +1,28 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.isPointInPath.unclosed
+// Description:isPointInPath() works on unclosed subpaths
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("isPointInPath() works on unclosed subpaths");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.moveTo(0, 0);
+ctx.lineTo(20, 0);
+ctx.lineTo(20, 20);
+ctx.lineTo(0, 20);
+_assertSame(ctx.isPointInPath(10, 10), true, "ctx.isPointInPath(10, 10)", "true");
+_assertSame(ctx.isPointInPath(30, 10), false, "ctx.isPointInPath(30, 10)", "false");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.winding.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.winding.html
new file mode 100644
index 0000000000..9698017e4f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.winding.html
@@ -0,0 +1,46 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.isPointInPath.winding</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.isPointInPath.winding</h1>
+<p class="desc">isPointInPath() uses the non-zero winding number rule</p>
+
+
+<script>
+var t = async_test("isPointInPath() uses the non-zero winding number rule");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+// Create a square ring, using opposite windings to make a hole in the centre
+ctx.moveTo(0, 0);
+ctx.lineTo(50, 0);
+ctx.lineTo(50, 50);
+ctx.lineTo(0, 50);
+ctx.lineTo(0, 0);
+ctx.lineTo(10, 10);
+ctx.lineTo(10, 40);
+ctx.lineTo(40, 40);
+ctx.lineTo(40, 10);
+ctx.lineTo(10, 10);
+_assertSame(ctx.isPointInPath(5, 5), true, "ctx.isPointInPath(5, 5)", "true");
+_assertSame(ctx.isPointInPath(25, 5), true, "ctx.isPointInPath(25, 5)", "true");
+_assertSame(ctx.isPointInPath(45, 5), true, "ctx.isPointInPath(45, 5)", "true");
+_assertSame(ctx.isPointInPath(5, 25), true, "ctx.isPointInPath(5, 25)", "true");
+_assertSame(ctx.isPointInPath(25, 25), false, "ctx.isPointInPath(25, 25)", "false");
+_assertSame(ctx.isPointInPath(45, 25), true, "ctx.isPointInPath(45, 25)", "true");
+_assertSame(ctx.isPointInPath(5, 45), true, "ctx.isPointInPath(5, 45)", "true");
+_assertSame(ctx.isPointInPath(25, 45), true, "ctx.isPointInPath(25, 45)", "true");
+_assertSame(ctx.isPointInPath(45, 45), true, "ctx.isPointInPath(45, 45)", "true");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.winding.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.winding.worker.js
new file mode 100644
index 0000000000..6ef758114a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInPath.winding.worker.js
@@ -0,0 +1,42 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.isPointInPath.winding
+// Description:isPointInPath() uses the non-zero winding number rule
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("isPointInPath() uses the non-zero winding number rule");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+// Create a square ring, using opposite windings to make a hole in the centre
+ctx.moveTo(0, 0);
+ctx.lineTo(50, 0);
+ctx.lineTo(50, 50);
+ctx.lineTo(0, 50);
+ctx.lineTo(0, 0);
+ctx.lineTo(10, 10);
+ctx.lineTo(10, 40);
+ctx.lineTo(40, 40);
+ctx.lineTo(40, 10);
+ctx.lineTo(10, 10);
+_assertSame(ctx.isPointInPath(5, 5), true, "ctx.isPointInPath(5, 5)", "true");
+_assertSame(ctx.isPointInPath(25, 5), true, "ctx.isPointInPath(25, 5)", "true");
+_assertSame(ctx.isPointInPath(45, 5), true, "ctx.isPointInPath(45, 5)", "true");
+_assertSame(ctx.isPointInPath(5, 25), true, "ctx.isPointInPath(5, 25)", "true");
+_assertSame(ctx.isPointInPath(25, 25), false, "ctx.isPointInPath(25, 25)", "false");
+_assertSame(ctx.isPointInPath(45, 25), true, "ctx.isPointInPath(45, 25)", "true");
+_assertSame(ctx.isPointInPath(5, 45), true, "ctx.isPointInPath(5, 45)", "true");
+_assertSame(ctx.isPointInPath(25, 45), true, "ctx.isPointInPath(25, 45)", "true");
+_assertSame(ctx.isPointInPath(45, 45), true, "ctx.isPointInPath(45, 45)", "true");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInStroke.basic.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInStroke.basic.html
new file mode 100644
index 0000000000..95f7fd721d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInStroke.basic.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.isPointInStroke.basic</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.isPointInStroke.basic</h1>
+<p class="desc">detects whether point is in the area contained by the stroke of the path</p>
+
+
+<script>
+var t = async_test("detects whether point is in the area contained by the stroke of the path");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.strokeStyle = '#0f0';
+ctx.beginPath();
+ctx.rect(0, 0, 20, 20);
+_assertSame(ctx.isPointInStroke(0, 0), true, "ctx.isPointInStroke(0, 0)", "true");
+_assertSame(ctx.isPointInStroke(30, 10), false, "ctx.isPointInStroke(30, 10)", "false");
+
+var path = new Path2D();
+path.rect(20, 20, 100, 100);
+_assertSame(ctx.isPointInStroke(path, 20, 20), true, "ctx.isPointInStroke(path, 20, 20)", "true");
+_assertSame(ctx.isPointInStroke(path, 120, 20), true, "ctx.isPointInStroke(path, 120, 20)", "true");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInStroke.basic.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInStroke.basic.worker.js
new file mode 100644
index 0000000000..844f0ef154
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.isPointInStroke.basic.worker.js
@@ -0,0 +1,32 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.isPointInStroke.basic
+// Description:detects whether point is in the area contained by the stroke of the path
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("detects whether point is in the area contained by the stroke of the path");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.strokeStyle = '#0f0';
+ctx.beginPath();
+ctx.rect(0, 0, 20, 20);
+_assertSame(ctx.isPointInStroke(0, 0), true, "ctx.isPointInStroke(0, 0)", "true");
+_assertSame(ctx.isPointInStroke(30, 10), false, "ctx.isPointInStroke(30, 10)", "false");
+
+var path = new Path2D();
+path.rect(20, 20, 100, 100);
+_assertSame(ctx.isPointInStroke(path, 20, 20), true, "ctx.isPointInStroke(path, 20, 20)", "true");
+_assertSame(ctx.isPointInStroke(path, 120, 20), true, "ctx.isPointInStroke(path, 120, 20)", "true");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.lineTo.basic.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.lineTo.basic.html
new file mode 100644
index 0000000000..3247ededcc
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.lineTo.basic.html
@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.lineTo.basic</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.lineTo.basic</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 50;
+ctx.beginPath();
+ctx.moveTo(0, 25);
+ctx.lineTo(100, 25);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.lineTo.basic.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.lineTo.basic.worker.js
new file mode 100644
index 0000000000..980de5c1b2
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.lineTo.basic.worker.js
@@ -0,0 +1,31 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.lineTo.basic
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 50;
+ctx.beginPath();
+ctx.moveTo(0, 25);
+ctx.lineTo(100, 25);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.lineTo.ensuresubpath.1.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.lineTo.ensuresubpath.1.html
new file mode 100644
index 0000000000..5a15f9ece4
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.lineTo.ensuresubpath.1.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.lineTo.ensuresubpath.1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.lineTo.ensuresubpath.1</h1>
+<p class="desc">If there is no subpath, the point is added and nothing is drawn</p>
+
+
+<script>
+var t = async_test("If there is no subpath, the point is added and nothing is drawn");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 50;
+ctx.beginPath();
+ctx.lineTo(100, 50);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.lineTo.ensuresubpath.1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.lineTo.ensuresubpath.1.worker.js
new file mode 100644
index 0000000000..024754ca0e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.lineTo.ensuresubpath.1.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.lineTo.ensuresubpath.1
+// Description:If there is no subpath, the point is added and nothing is drawn
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("If there is no subpath, the point is added and nothing is drawn");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 50;
+ctx.beginPath();
+ctx.lineTo(100, 50);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.lineTo.ensuresubpath.2.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.lineTo.ensuresubpath.2.html
new file mode 100644
index 0000000000..eaad8dabcc
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.lineTo.ensuresubpath.2.html
@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.lineTo.ensuresubpath.2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.lineTo.ensuresubpath.2</h1>
+<p class="desc">If there is no subpath, the point is added and used for subsequent drawing</p>
+
+
+<script>
+var t = async_test("If there is no subpath, the point is added and used for subsequent drawing");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 50;
+ctx.beginPath();
+ctx.lineTo(0, 25);
+ctx.lineTo(100, 25);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.lineTo.ensuresubpath.2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.lineTo.ensuresubpath.2.worker.js
new file mode 100644
index 0000000000..2a15c9e14d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.lineTo.ensuresubpath.2.worker.js
@@ -0,0 +1,31 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.lineTo.ensuresubpath.2
+// Description:If there is no subpath, the point is added and used for subsequent drawing
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("If there is no subpath, the point is added and used for subsequent drawing");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 50;
+ctx.beginPath();
+ctx.lineTo(0, 25);
+ctx.lineTo(100, 25);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.lineTo.nextpoint.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.lineTo.nextpoint.html
new file mode 100644
index 0000000000..fc697b9be5
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.lineTo.nextpoint.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.lineTo.nextpoint</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.lineTo.nextpoint</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 50;
+ctx.beginPath();
+ctx.moveTo(-100, -100);
+ctx.lineTo(0, 25);
+ctx.lineTo(100, 25);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.lineTo.nextpoint.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.lineTo.nextpoint.worker.js
new file mode 100644
index 0000000000..de9d56be06
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.lineTo.nextpoint.worker.js
@@ -0,0 +1,32 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.lineTo.nextpoint
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 50;
+ctx.beginPath();
+ctx.moveTo(-100, -100);
+ctx.lineTo(0, 25);
+ctx.lineTo(100, 25);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.lineTo.nonfinite.details.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.lineTo.nonfinite.details.html
new file mode 100644
index 0000000000..82270be534
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.lineTo.nonfinite.details.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.lineTo.nonfinite.details</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.lineTo.nonfinite.details</h1>
+<p class="desc">lineTo() with Infinity/NaN for first arg still converts the second arg</p>
+
+
+<script>
+var t = async_test("lineTo() with Infinity/NaN for first arg still converts the second arg");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+for (var arg1 of [Infinity, -Infinity, NaN]) {
+ var converted = false;
+ ctx.lineTo(arg1, { valueOf: function() { converted = true; return 0; } });
+ _assert(converted, "converted");
+}
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.lineTo.nonfinite.details.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.lineTo.nonfinite.details.worker.js
new file mode 100644
index 0000000000..bf74ee5b50
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.lineTo.nonfinite.details.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.lineTo.nonfinite.details
+// Description:lineTo() with Infinity/NaN for first arg still converts the second arg
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("lineTo() with Infinity/NaN for first arg still converts the second arg");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+for (var arg1 of [Infinity, -Infinity, NaN]) {
+ var converted = false;
+ ctx.lineTo(arg1, { valueOf: function() { converted = true; return 0; } });
+ _assert(converted, "converted");
+}
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.lineTo.nonfinite.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.lineTo.nonfinite.html
new file mode 100644
index 0000000000..02d77163fd
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.lineTo.nonfinite.html
@@ -0,0 +1,41 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.lineTo.nonfinite</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.lineTo.nonfinite</h1>
+<p class="desc">lineTo() with Infinity/NaN is ignored</p>
+
+
+<script>
+var t = async_test("lineTo() with Infinity/NaN is ignored");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.moveTo(0, 0);
+ctx.lineTo(100, 0);
+ctx.lineTo(Infinity, 50);
+ctx.lineTo(-Infinity, 50);
+ctx.lineTo(NaN, 50);
+ctx.lineTo(0, Infinity);
+ctx.lineTo(0, -Infinity);
+ctx.lineTo(0, NaN);
+ctx.lineTo(Infinity, Infinity);
+ctx.lineTo(100, 50);
+ctx.lineTo(0, 50);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 90,45, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.lineTo.nonfinite.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.lineTo.nonfinite.worker.js
new file mode 100644
index 0000000000..5161b4e432
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.lineTo.nonfinite.worker.js
@@ -0,0 +1,37 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.lineTo.nonfinite
+// Description:lineTo() with Infinity/NaN is ignored
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("lineTo() with Infinity/NaN is ignored");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.moveTo(0, 0);
+ctx.lineTo(100, 0);
+ctx.lineTo(Infinity, 50);
+ctx.lineTo(-Infinity, 50);
+ctx.lineTo(NaN, 50);
+ctx.lineTo(0, Infinity);
+ctx.lineTo(0, -Infinity);
+ctx.lineTo(0, NaN);
+ctx.lineTo(Infinity, Infinity);
+ctx.lineTo(100, 50);
+ctx.lineTo(0, 50);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 90,45, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.moveTo.basic.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.moveTo.basic.html
new file mode 100644
index 0000000000..8363792c70
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.moveTo.basic.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.moveTo.basic</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.moveTo.basic</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.rect(0, 0, 10, 50);
+ctx.moveTo(100, 0);
+ctx.lineTo(10, 0);
+ctx.lineTo(10, 50);
+ctx.lineTo(100, 50);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+_assertPixel(canvas, 90,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.moveTo.basic.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.moveTo.basic.worker.js
new file mode 100644
index 0000000000..eca39660bc
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.moveTo.basic.worker.js
@@ -0,0 +1,32 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.moveTo.basic
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.rect(0, 0, 10, 50);
+ctx.moveTo(100, 0);
+ctx.lineTo(10, 0);
+ctx.lineTo(10, 50);
+ctx.lineTo(100, 50);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+_assertPixel(canvas, 90,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.moveTo.multiple.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.moveTo.multiple.html
new file mode 100644
index 0000000000..928c9783d4
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.moveTo.multiple.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.moveTo.multiple</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.moveTo.multiple</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.moveTo(0, 25);
+ctx.moveTo(100, 25);
+ctx.moveTo(0, 25);
+ctx.lineTo(100, 25);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 50;
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.moveTo.multiple.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.moveTo.multiple.worker.js
new file mode 100644
index 0000000000..686f5ae84a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.moveTo.multiple.worker.js
@@ -0,0 +1,32 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.moveTo.multiple
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.moveTo(0, 25);
+ctx.moveTo(100, 25);
+ctx.moveTo(0, 25);
+ctx.lineTo(100, 25);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 50;
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.moveTo.newsubpath.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.moveTo.newsubpath.html
new file mode 100644
index 0000000000..89fda23ffc
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.moveTo.newsubpath.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.moveTo.newsubpath</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.moveTo.newsubpath</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.beginPath();
+ctx.moveTo(0, 0);
+ctx.moveTo(100, 0);
+ctx.moveTo(100, 50);
+ctx.moveTo(0, 50);
+ctx.fillStyle = '#f00';
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.moveTo.newsubpath.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.moveTo.newsubpath.worker.js
new file mode 100644
index 0000000000..d00491c42b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.moveTo.newsubpath.worker.js
@@ -0,0 +1,32 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.moveTo.newsubpath
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.beginPath();
+ctx.moveTo(0, 0);
+ctx.moveTo(100, 0);
+ctx.moveTo(100, 50);
+ctx.moveTo(0, 50);
+ctx.fillStyle = '#f00';
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.moveTo.nonfinite.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.moveTo.nonfinite.html
new file mode 100644
index 0000000000..1a2e6cfe83
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.moveTo.nonfinite.html
@@ -0,0 +1,40 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.moveTo.nonfinite</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.moveTo.nonfinite</h1>
+<p class="desc">moveTo() with Infinity/NaN is ignored</p>
+
+
+<script>
+var t = async_test("moveTo() with Infinity/NaN is ignored");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.moveTo(0, 0);
+ctx.lineTo(100, 0);
+ctx.moveTo(Infinity, 50);
+ctx.moveTo(-Infinity, 50);
+ctx.moveTo(NaN, 50);
+ctx.moveTo(0, Infinity);
+ctx.moveTo(0, -Infinity);
+ctx.moveTo(0, NaN);
+ctx.moveTo(Infinity, Infinity);
+ctx.lineTo(100, 50);
+ctx.lineTo(0, 50);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.moveTo.nonfinite.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.moveTo.nonfinite.worker.js
new file mode 100644
index 0000000000..ced534fb95
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.moveTo.nonfinite.worker.js
@@ -0,0 +1,36 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.moveTo.nonfinite
+// Description:moveTo() with Infinity/NaN is ignored
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("moveTo() with Infinity/NaN is ignored");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.moveTo(0, 0);
+ctx.lineTo(100, 0);
+ctx.moveTo(Infinity, 50);
+ctx.moveTo(-Infinity, 50);
+ctx.moveTo(NaN, 50);
+ctx.moveTo(0, Infinity);
+ctx.moveTo(0, -Infinity);
+ctx.moveTo(0, NaN);
+ctx.moveTo(Infinity, Infinity);
+ctx.lineTo(100, 50);
+ctx.lineTo(0, 50);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.quadraticCurveTo.basic.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.quadraticCurveTo.basic.html
new file mode 100644
index 0000000000..46a83e112c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.quadraticCurveTo.basic.html
@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.quadraticCurveTo.basic</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.quadraticCurveTo.basic</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 50;
+ctx.beginPath();
+ctx.moveTo(0, 25);
+ctx.quadraticCurveTo(100, 25, 100, 25);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.quadraticCurveTo.basic.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.quadraticCurveTo.basic.worker.js
new file mode 100644
index 0000000000..a1dfa045d9
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.quadraticCurveTo.basic.worker.js
@@ -0,0 +1,31 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.quadraticCurveTo.basic
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 50;
+ctx.beginPath();
+ctx.moveTo(0, 25);
+ctx.quadraticCurveTo(100, 25, 100, 25);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.quadraticCurveTo.ensuresubpath.1.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.quadraticCurveTo.ensuresubpath.1.html
new file mode 100644
index 0000000000..37662e4618
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.quadraticCurveTo.ensuresubpath.1.html
@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.quadraticCurveTo.ensuresubpath.1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.quadraticCurveTo.ensuresubpath.1</h1>
+<p class="desc">If there is no subpath, the first control point is added (and nothing is drawn up to it)</p>
+
+
+<script>
+var t = async_test("If there is no subpath, the first control point is added (and nothing is drawn up to it)");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 50;
+ctx.beginPath();
+ctx.quadraticCurveTo(100, 50, 200, 50);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 95,45, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.quadraticCurveTo.ensuresubpath.1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.quadraticCurveTo.ensuresubpath.1.worker.js
new file mode 100644
index 0000000000..fe20e7b890
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.quadraticCurveTo.ensuresubpath.1.worker.js
@@ -0,0 +1,31 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.quadraticCurveTo.ensuresubpath.1
+// Description:If there is no subpath, the first control point is added (and nothing is drawn up to it)
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("If there is no subpath, the first control point is added (and nothing is drawn up to it)");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 50;
+ctx.beginPath();
+ctx.quadraticCurveTo(100, 50, 200, 50);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 95,45, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.quadraticCurveTo.ensuresubpath.2.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.quadraticCurveTo.ensuresubpath.2.html
new file mode 100644
index 0000000000..2f18424749
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.quadraticCurveTo.ensuresubpath.2.html
@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.quadraticCurveTo.ensuresubpath.2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.quadraticCurveTo.ensuresubpath.2</h1>
+<p class="desc">If there is no subpath, the first control point is added</p>
+
+
+<script>
+var t = async_test("If there is no subpath, the first control point is added");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 50;
+ctx.beginPath();
+ctx.quadraticCurveTo(0, 25, 100, 25);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 5,45, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.quadraticCurveTo.ensuresubpath.2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.quadraticCurveTo.ensuresubpath.2.worker.js
new file mode 100644
index 0000000000..f840168f98
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.quadraticCurveTo.ensuresubpath.2.worker.js
@@ -0,0 +1,31 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.quadraticCurveTo.ensuresubpath.2
+// Description:If there is no subpath, the first control point is added
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("If there is no subpath, the first control point is added");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 50;
+ctx.beginPath();
+ctx.quadraticCurveTo(0, 25, 100, 25);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 5,45, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.quadraticCurveTo.nonfinite.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.quadraticCurveTo.nonfinite.html
new file mode 100644
index 0000000000..1083f027e2
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.quadraticCurveTo.nonfinite.html
@@ -0,0 +1,57 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.quadraticCurveTo.nonfinite</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.quadraticCurveTo.nonfinite</h1>
+<p class="desc">quadraticCurveTo() with Infinity/NaN is ignored</p>
+
+
+<script>
+var t = async_test("quadraticCurveTo() with Infinity/NaN is ignored");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.moveTo(0, 0);
+ctx.lineTo(100, 0);
+ctx.quadraticCurveTo(Infinity, 50, 0, 50);
+ctx.quadraticCurveTo(-Infinity, 50, 0, 50);
+ctx.quadraticCurveTo(NaN, 50, 0, 50);
+ctx.quadraticCurveTo(0, Infinity, 0, 50);
+ctx.quadraticCurveTo(0, -Infinity, 0, 50);
+ctx.quadraticCurveTo(0, NaN, 0, 50);
+ctx.quadraticCurveTo(0, 50, Infinity, 50);
+ctx.quadraticCurveTo(0, 50, -Infinity, 50);
+ctx.quadraticCurveTo(0, 50, NaN, 50);
+ctx.quadraticCurveTo(0, 50, 0, Infinity);
+ctx.quadraticCurveTo(0, 50, 0, -Infinity);
+ctx.quadraticCurveTo(0, 50, 0, NaN);
+ctx.quadraticCurveTo(Infinity, Infinity, 0, 50);
+ctx.quadraticCurveTo(Infinity, Infinity, Infinity, 50);
+ctx.quadraticCurveTo(Infinity, Infinity, Infinity, Infinity);
+ctx.quadraticCurveTo(Infinity, Infinity, 0, Infinity);
+ctx.quadraticCurveTo(Infinity, 50, Infinity, 50);
+ctx.quadraticCurveTo(Infinity, 50, Infinity, Infinity);
+ctx.quadraticCurveTo(Infinity, 50, 0, Infinity);
+ctx.quadraticCurveTo(0, Infinity, Infinity, 50);
+ctx.quadraticCurveTo(0, Infinity, Infinity, Infinity);
+ctx.quadraticCurveTo(0, Infinity, 0, Infinity);
+ctx.quadraticCurveTo(0, 50, Infinity, Infinity);
+ctx.lineTo(100, 50);
+ctx.lineTo(0, 50);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 90,45, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.quadraticCurveTo.nonfinite.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.quadraticCurveTo.nonfinite.worker.js
new file mode 100644
index 0000000000..df17bd6d36
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.quadraticCurveTo.nonfinite.worker.js
@@ -0,0 +1,53 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.quadraticCurveTo.nonfinite
+// Description:quadraticCurveTo() with Infinity/NaN is ignored
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("quadraticCurveTo() with Infinity/NaN is ignored");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.moveTo(0, 0);
+ctx.lineTo(100, 0);
+ctx.quadraticCurveTo(Infinity, 50, 0, 50);
+ctx.quadraticCurveTo(-Infinity, 50, 0, 50);
+ctx.quadraticCurveTo(NaN, 50, 0, 50);
+ctx.quadraticCurveTo(0, Infinity, 0, 50);
+ctx.quadraticCurveTo(0, -Infinity, 0, 50);
+ctx.quadraticCurveTo(0, NaN, 0, 50);
+ctx.quadraticCurveTo(0, 50, Infinity, 50);
+ctx.quadraticCurveTo(0, 50, -Infinity, 50);
+ctx.quadraticCurveTo(0, 50, NaN, 50);
+ctx.quadraticCurveTo(0, 50, 0, Infinity);
+ctx.quadraticCurveTo(0, 50, 0, -Infinity);
+ctx.quadraticCurveTo(0, 50, 0, NaN);
+ctx.quadraticCurveTo(Infinity, Infinity, 0, 50);
+ctx.quadraticCurveTo(Infinity, Infinity, Infinity, 50);
+ctx.quadraticCurveTo(Infinity, Infinity, Infinity, Infinity);
+ctx.quadraticCurveTo(Infinity, Infinity, 0, Infinity);
+ctx.quadraticCurveTo(Infinity, 50, Infinity, 50);
+ctx.quadraticCurveTo(Infinity, 50, Infinity, Infinity);
+ctx.quadraticCurveTo(Infinity, 50, 0, Infinity);
+ctx.quadraticCurveTo(0, Infinity, Infinity, 50);
+ctx.quadraticCurveTo(0, Infinity, Infinity, Infinity);
+ctx.quadraticCurveTo(0, Infinity, 0, Infinity);
+ctx.quadraticCurveTo(0, 50, Infinity, Infinity);
+ctx.lineTo(100, 50);
+ctx.lineTo(0, 50);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 90,45, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.quadraticCurveTo.scaled.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.quadraticCurveTo.scaled.html
new file mode 100644
index 0000000000..60ba483f14
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.quadraticCurveTo.scaled.html
@@ -0,0 +1,40 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.quadraticCurveTo.scaled</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.quadraticCurveTo.scaled</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.scale(1000, 1000);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 0.055;
+ctx.beginPath();
+ctx.moveTo(-1, 1.05);
+ctx.quadraticCurveTo(0, -1, 1.2, 1.05);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.quadraticCurveTo.scaled.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.quadraticCurveTo.scaled.worker.js
new file mode 100644
index 0000000000..298001b212
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.quadraticCurveTo.scaled.worker.js
@@ -0,0 +1,36 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.quadraticCurveTo.scaled
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.scale(1000, 1000);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 0.055;
+ctx.beginPath();
+ctx.moveTo(-1, 1.05);
+ctx.quadraticCurveTo(0, -1, 1.2, 1.05);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.quadraticCurveTo.shape.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.quadraticCurveTo.shape.html
new file mode 100644
index 0000000000..21cb175d59
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.quadraticCurveTo.shape.html
@@ -0,0 +1,39 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.quadraticCurveTo.shape</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.quadraticCurveTo.shape</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 55;
+ctx.beginPath();
+ctx.moveTo(-1000, 1050);
+ctx.quadraticCurveTo(0, -1000, 1200, 1050);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.quadraticCurveTo.shape.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.quadraticCurveTo.shape.worker.js
new file mode 100644
index 0000000000..f7aac9135a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.quadraticCurveTo.shape.worker.js
@@ -0,0 +1,35 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.quadraticCurveTo.shape
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 55;
+ctx.beginPath();
+ctx.moveTo(-1000, 1050);
+ctx.quadraticCurveTo(0, -1000, 1200, 1050);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.basic.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.basic.html
new file mode 100644
index 0000000000..5214bd8dc0
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.basic.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.rect.basic</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.rect.basic</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.rect(0, 0, 100, 50);
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.basic.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.basic.worker.js
new file mode 100644
index 0000000000..dcf3dc2a4b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.basic.worker.js
@@ -0,0 +1,28 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.rect.basic
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.rect(0, 0, 100, 50);
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.closed.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.closed.html
new file mode 100644
index 0000000000..70db3725a1
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.closed.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.rect.closed</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.rect.closed</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 200;
+ctx.lineJoin = 'miter';
+ctx.rect(100, 50, 100, 100);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.closed.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.closed.worker.js
new file mode 100644
index 0000000000..6ee09ef8d4
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.closed.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.rect.closed
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 200;
+ctx.lineJoin = 'miter';
+ctx.rect(100, 50, 100, 100);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.end.1.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.end.1.html
new file mode 100644
index 0000000000..bb4bfc0c90
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.end.1.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.rect.end.1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.rect.end.1</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 100;
+ctx.rect(200, 100, 400, 1000);
+ctx.lineTo(-2000, -1000);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.end.1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.end.1.worker.js
new file mode 100644
index 0000000000..f576ac4366
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.end.1.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.rect.end.1
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 100;
+ctx.rect(200, 100, 400, 1000);
+ctx.lineTo(-2000, -1000);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.end.2.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.end.2.html
new file mode 100644
index 0000000000..1f945a858e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.end.2.html
@@ -0,0 +1,39 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.rect.end.2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.rect.end.2</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 450;
+ctx.lineCap = 'round';
+ctx.lineJoin = 'bevel';
+ctx.rect(150, 150, 2000, 2000);
+ctx.lineTo(160, 160);
+ctx.stroke();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.end.2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.end.2.worker.js
new file mode 100644
index 0000000000..8813ed8152
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.end.2.worker.js
@@ -0,0 +1,35 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.rect.end.2
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 450;
+ctx.lineCap = 'round';
+ctx.lineJoin = 'bevel';
+ctx.rect(150, 150, 2000, 2000);
+ctx.lineTo(160, 160);
+ctx.stroke();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.negative.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.negative.html
new file mode 100644
index 0000000000..8c9effe2a5
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.negative.html
@@ -0,0 +1,39 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.rect.negative</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.rect.negative</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.beginPath();
+ctx.fillStyle = '#0f0';
+ctx.rect(0, 0, 50, 25);
+ctx.rect(100, 0, -50, 25);
+ctx.rect(0, 50, 50, -25);
+ctx.rect(100, 50, -50, -25);
+ctx.fill();
+_assertPixel(canvas, 25,12, 0,255,0,255);
+_assertPixel(canvas, 75,12, 0,255,0,255);
+_assertPixel(canvas, 25,37, 0,255,0,255);
+_assertPixel(canvas, 75,37, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.negative.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.negative.worker.js
new file mode 100644
index 0000000000..ea01c6d3f0
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.negative.worker.js
@@ -0,0 +1,35 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.rect.negative
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.beginPath();
+ctx.fillStyle = '#0f0';
+ctx.rect(0, 0, 50, 25);
+ctx.rect(100, 0, -50, 25);
+ctx.rect(0, 50, 50, -25);
+ctx.rect(100, 50, -50, -25);
+ctx.fill();
+_assertPixel(canvas, 25,12, 0,255,0,255);
+_assertPixel(canvas, 75,12, 0,255,0,255);
+_assertPixel(canvas, 25,37, 0,255,0,255);
+_assertPixel(canvas, 75,37, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.newsubpath.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.newsubpath.html
new file mode 100644
index 0000000000..1dcfbe9486
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.newsubpath.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.rect.newsubpath</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.rect.newsubpath</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.beginPath();
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 50;
+ctx.moveTo(-100, 25);
+ctx.lineTo(-50, 25);
+ctx.rect(200, 25, 1, 1);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.newsubpath.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.newsubpath.worker.js
new file mode 100644
index 0000000000..44962c5f2f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.newsubpath.worker.js
@@ -0,0 +1,32 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.rect.newsubpath
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.beginPath();
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 50;
+ctx.moveTo(-100, 25);
+ctx.lineTo(-50, 25);
+ctx.rect(200, 25, 1, 1);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.nonfinite.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.nonfinite.html
new file mode 100644
index 0000000000..7f92cf5e48
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.nonfinite.html
@@ -0,0 +1,57 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.rect.nonfinite</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.rect.nonfinite</h1>
+<p class="desc">rect() with Infinity/NaN is ignored</p>
+
+
+<script>
+var t = async_test("rect() with Infinity/NaN is ignored");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.moveTo(0, 0);
+ctx.lineTo(100, 0);
+ctx.rect(Infinity, 50, 1, 1);
+ctx.rect(-Infinity, 50, 1, 1);
+ctx.rect(NaN, 50, 1, 1);
+ctx.rect(0, Infinity, 1, 1);
+ctx.rect(0, -Infinity, 1, 1);
+ctx.rect(0, NaN, 1, 1);
+ctx.rect(0, 50, Infinity, 1);
+ctx.rect(0, 50, -Infinity, 1);
+ctx.rect(0, 50, NaN, 1);
+ctx.rect(0, 50, 1, Infinity);
+ctx.rect(0, 50, 1, -Infinity);
+ctx.rect(0, 50, 1, NaN);
+ctx.rect(Infinity, Infinity, 1, 1);
+ctx.rect(Infinity, Infinity, Infinity, 1);
+ctx.rect(Infinity, Infinity, Infinity, Infinity);
+ctx.rect(Infinity, Infinity, 1, Infinity);
+ctx.rect(Infinity, 50, Infinity, 1);
+ctx.rect(Infinity, 50, Infinity, Infinity);
+ctx.rect(Infinity, 50, 1, Infinity);
+ctx.rect(0, Infinity, Infinity, 1);
+ctx.rect(0, Infinity, Infinity, Infinity);
+ctx.rect(0, Infinity, 1, Infinity);
+ctx.rect(0, 50, Infinity, Infinity);
+ctx.lineTo(100, 50);
+ctx.lineTo(0, 50);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 90,45, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.nonfinite.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.nonfinite.worker.js
new file mode 100644
index 0000000000..6fa1e82ae4
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.nonfinite.worker.js
@@ -0,0 +1,53 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.rect.nonfinite
+// Description:rect() with Infinity/NaN is ignored
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("rect() with Infinity/NaN is ignored");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.moveTo(0, 0);
+ctx.lineTo(100, 0);
+ctx.rect(Infinity, 50, 1, 1);
+ctx.rect(-Infinity, 50, 1, 1);
+ctx.rect(NaN, 50, 1, 1);
+ctx.rect(0, Infinity, 1, 1);
+ctx.rect(0, -Infinity, 1, 1);
+ctx.rect(0, NaN, 1, 1);
+ctx.rect(0, 50, Infinity, 1);
+ctx.rect(0, 50, -Infinity, 1);
+ctx.rect(0, 50, NaN, 1);
+ctx.rect(0, 50, 1, Infinity);
+ctx.rect(0, 50, 1, -Infinity);
+ctx.rect(0, 50, 1, NaN);
+ctx.rect(Infinity, Infinity, 1, 1);
+ctx.rect(Infinity, Infinity, Infinity, 1);
+ctx.rect(Infinity, Infinity, Infinity, Infinity);
+ctx.rect(Infinity, Infinity, 1, Infinity);
+ctx.rect(Infinity, 50, Infinity, 1);
+ctx.rect(Infinity, 50, Infinity, Infinity);
+ctx.rect(Infinity, 50, 1, Infinity);
+ctx.rect(0, Infinity, Infinity, 1);
+ctx.rect(0, Infinity, Infinity, Infinity);
+ctx.rect(0, Infinity, 1, Infinity);
+ctx.rect(0, 50, Infinity, Infinity);
+ctx.lineTo(100, 50);
+ctx.lineTo(0, 50);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 90,45, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.selfintersect.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.selfintersect.html
new file mode 100644
index 0000000000..36c3f07419
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.selfintersect.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.rect.selfintersect</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.rect.selfintersect</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 90;
+ctx.beginPath();
+ctx.rect(45, 20, 10, 10);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.selfintersect.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.selfintersect.worker.js
new file mode 100644
index 0000000000..84c2687f30
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.selfintersect.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.rect.selfintersect
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 90;
+ctx.beginPath();
+ctx.rect(45, 20, 10, 10);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.winding.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.winding.html
new file mode 100644
index 0000000000..c4f4128188
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.winding.html
@@ -0,0 +1,39 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.rect.winding</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.rect.winding</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.beginPath();
+ctx.fillStyle = '#f00';
+ctx.rect(0, 0, 50, 50);
+ctx.rect(100, 50, -50, -50);
+ctx.rect(0, 25, 100, -25);
+ctx.rect(100, 25, -100, 25);
+ctx.fill();
+_assertPixel(canvas, 25,12, 0,255,0,255);
+_assertPixel(canvas, 75,12, 0,255,0,255);
+_assertPixel(canvas, 25,37, 0,255,0,255);
+_assertPixel(canvas, 75,37, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.winding.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.winding.worker.js
new file mode 100644
index 0000000000..90a3d05e8b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.winding.worker.js
@@ -0,0 +1,35 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.rect.winding
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.beginPath();
+ctx.fillStyle = '#f00';
+ctx.rect(0, 0, 50, 50);
+ctx.rect(100, 50, -50, -50);
+ctx.rect(0, 25, 100, -25);
+ctx.rect(100, 25, -100, 25);
+ctx.fill();
+_assertPixel(canvas, 25,12, 0,255,0,255);
+_assertPixel(canvas, 75,12, 0,255,0,255);
+_assertPixel(canvas, 25,37, 0,255,0,255);
+_assertPixel(canvas, 75,37, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.zero.1.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.zero.1.html
new file mode 100644
index 0000000000..90c0bb1f68
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.zero.1.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.rect.zero.1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.rect.zero.1</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 100;
+ctx.beginPath();
+ctx.rect(0, 50, 100, 0);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.zero.1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.zero.1.worker.js
new file mode 100644
index 0000000000..4d080710d0
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.zero.1.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.rect.zero.1
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 100;
+ctx.beginPath();
+ctx.rect(0, 50, 100, 0);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.zero.2.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.zero.2.html
new file mode 100644
index 0000000000..4c3ae6f6dd
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.zero.2.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.rect.zero.2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.rect.zero.2</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 100;
+ctx.beginPath();
+ctx.rect(50, -100, 0, 250);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.zero.2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.zero.2.worker.js
new file mode 100644
index 0000000000..93d5a52875
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.zero.2.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.rect.zero.2
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 100;
+ctx.beginPath();
+ctx.rect(50, -100, 0, 250);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.zero.3.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.zero.3.html
new file mode 100644
index 0000000000..86bd749418
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.zero.3.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.rect.zero.3</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.rect.zero.3</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 100;
+ctx.beginPath();
+ctx.rect(50, 25, 0, 0);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.zero.3.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.zero.3.worker.js
new file mode 100644
index 0000000000..6403de43c0
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.zero.3.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.rect.zero.3
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 100;
+ctx.beginPath();
+ctx.rect(50, 25, 0, 0);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.zero.4.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.zero.4.html
new file mode 100644
index 0000000000..063ef2ba1d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.zero.4.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.rect.zero.4</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.rect.zero.4</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 50;
+ctx.rect(100, 25, 0, 0);
+ctx.lineTo(0, 25);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.zero.4.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.zero.4.worker.js
new file mode 100644
index 0000000000..87fd698566
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.zero.4.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.rect.zero.4
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 50;
+ctx.rect(100, 25, 0, 0);
+ctx.lineTo(0, 25);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.zero.5.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.zero.5.html
new file mode 100644
index 0000000000..0fa0b07550
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.zero.5.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.rect.zero.5</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.rect.zero.5</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 50;
+ctx.moveTo(0, 0);
+ctx.rect(100, 25, 0, 0);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.zero.5.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.zero.5.worker.js
new file mode 100644
index 0000000000..77851f54d3
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.zero.5.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.rect.zero.5
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 50;
+ctx.moveTo(0, 0);
+ctx.rect(100, 25, 0, 0);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.zero.6.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.zero.6.html
new file mode 100644
index 0000000000..a3cf7b60ac
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.zero.6.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.rect.zero.6</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.rect.zero.6</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#f00';
+ctx.lineJoin = 'miter';
+ctx.miterLimit = 1.5;
+ctx.lineWidth = 200;
+ctx.beginPath();
+ctx.rect(100, 25, 1000, 0);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.zero.6.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.zero.6.worker.js
new file mode 100644
index 0000000000..5db284837c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.rect.zero.6.worker.js
@@ -0,0 +1,32 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.rect.zero.6
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#f00';
+ctx.lineJoin = 'miter';
+ctx.miterLimit = 1.5;
+ctx.lineWidth = 200;
+ctx.beginPath();
+ctx.rect(100, 25, 1000, 0);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.1.radius.dompoint.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.1.radius.dompoint.html
new file mode 100644
index 0000000000..479ab00cd7
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.1.radius.dompoint.html
@@ -0,0 +1,55 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.roundrect.1.radius.dompoint</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.roundrect.1.radius.dompoint</h1>
+<p class="desc">Verify that when two radii are given to roundRect(), the first radius, specified as a DOMPoint, applies to the top-left and bottom-left corners.</p>
+
+
+<script>
+var t = async_test("Verify that when two radii are given to roundRect(), the first radius, specified as a DOMPoint, applies to the top-left and bottom-left corners.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [new DOMPoint(40, 20)]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+
+// top-left corner
+_assertPixel(canvas, 20,1, 255,0,0,255);
+_assertPixel(canvas, 41,1, 0,255,0,255);
+_assertPixel(canvas, 1,10, 255,0,0,255);
+_assertPixel(canvas, 1,21, 0,255,0,255);
+
+// top-right corner
+_assertPixel(canvas, 79,1, 255,0,0,255);
+_assertPixel(canvas, 58,1, 0,255,0,255);
+_assertPixel(canvas, 98,10, 255,0,0,255);
+_assertPixel(canvas, 98,21, 0,255,0,255);
+
+// bottom-right corner
+_assertPixel(canvas, 79,48, 255,0,0,255);
+_assertPixel(canvas, 58,48, 0,255,0,255);
+_assertPixel(canvas, 98,39, 255,0,0,255);
+_assertPixel(canvas, 98,28, 0,255,0,255);
+
+// bottom-left corner
+_assertPixel(canvas, 20,48, 255,0,0,255);
+_assertPixel(canvas, 41,48, 0,255,0,255);
+_assertPixel(canvas, 1,39, 255,0,0,255);
+_assertPixel(canvas, 1,28, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.1.radius.dompoint.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.1.radius.dompoint.worker.js
new file mode 100644
index 0000000000..ba4fb4e611
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.1.radius.dompoint.worker.js
@@ -0,0 +1,51 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.roundrect.1.radius.dompoint
+// Description:Verify that when two radii are given to roundRect(), the first radius, specified as a DOMPoint, applies to the top-left and bottom-left corners.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Verify that when two radii are given to roundRect(), the first radius, specified as a DOMPoint, applies to the top-left and bottom-left corners.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [new DOMPoint(40, 20)]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+
+// top-left corner
+_assertPixel(canvas, 20,1, 255,0,0,255);
+_assertPixel(canvas, 41,1, 0,255,0,255);
+_assertPixel(canvas, 1,10, 255,0,0,255);
+_assertPixel(canvas, 1,21, 0,255,0,255);
+
+// top-right corner
+_assertPixel(canvas, 79,1, 255,0,0,255);
+_assertPixel(canvas, 58,1, 0,255,0,255);
+_assertPixel(canvas, 98,10, 255,0,0,255);
+_assertPixel(canvas, 98,21, 0,255,0,255);
+
+// bottom-right corner
+_assertPixel(canvas, 79,48, 255,0,0,255);
+_assertPixel(canvas, 58,48, 0,255,0,255);
+_assertPixel(canvas, 98,39, 255,0,0,255);
+_assertPixel(canvas, 98,28, 0,255,0,255);
+
+// bottom-left corner
+_assertPixel(canvas, 20,48, 255,0,0,255);
+_assertPixel(canvas, 41,48, 0,255,0,255);
+_assertPixel(canvas, 1,39, 255,0,0,255);
+_assertPixel(canvas, 1,28, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.1.radius.dompointinit.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.1.radius.dompointinit.html
new file mode 100644
index 0000000000..18ff259e66
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.1.radius.dompointinit.html
@@ -0,0 +1,55 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.roundrect.1.radius.dompointinit</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.roundrect.1.radius.dompointinit</h1>
+<p class="desc">Verify that when two radii are given to roundRect(), the first radius, specified as a DOMPoint, applies to the top-left and bottomInit-left corners.</p>
+
+
+<script>
+var t = async_test("Verify that when two radii are given to roundRect(), the first radius, specified as a DOMPoint, applies to the top-left and bottomInit-left corners.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [{x: 40, y: 20}]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+
+// top-left corner
+_assertPixel(canvas, 20,1, 255,0,0,255);
+_assertPixel(canvas, 41,1, 0,255,0,255);
+_assertPixel(canvas, 1,10, 255,0,0,255);
+_assertPixel(canvas, 1,21, 0,255,0,255);
+
+// top-right corner
+_assertPixel(canvas, 79,1, 255,0,0,255);
+_assertPixel(canvas, 58,1, 0,255,0,255);
+_assertPixel(canvas, 98,10, 255,0,0,255);
+_assertPixel(canvas, 98,21, 0,255,0,255);
+
+// bottom-right corner
+_assertPixel(canvas, 79,48, 255,0,0,255);
+_assertPixel(canvas, 58,48, 0,255,0,255);
+_assertPixel(canvas, 98,39, 255,0,0,255);
+_assertPixel(canvas, 98,28, 0,255,0,255);
+
+// bottom-left corner
+_assertPixel(canvas, 20,48, 255,0,0,255);
+_assertPixel(canvas, 41,48, 0,255,0,255);
+_assertPixel(canvas, 1,39, 255,0,0,255);
+_assertPixel(canvas, 1,28, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.1.radius.dompointinit.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.1.radius.dompointinit.worker.js
new file mode 100644
index 0000000000..589950c04e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.1.radius.dompointinit.worker.js
@@ -0,0 +1,51 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.roundrect.1.radius.dompointinit
+// Description:Verify that when two radii are given to roundRect(), the first radius, specified as a DOMPoint, applies to the top-left and bottomInit-left corners.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Verify that when two radii are given to roundRect(), the first radius, specified as a DOMPoint, applies to the top-left and bottomInit-left corners.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [{x: 40, y: 20}]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+
+// top-left corner
+_assertPixel(canvas, 20,1, 255,0,0,255);
+_assertPixel(canvas, 41,1, 0,255,0,255);
+_assertPixel(canvas, 1,10, 255,0,0,255);
+_assertPixel(canvas, 1,21, 0,255,0,255);
+
+// top-right corner
+_assertPixel(canvas, 79,1, 255,0,0,255);
+_assertPixel(canvas, 58,1, 0,255,0,255);
+_assertPixel(canvas, 98,10, 255,0,0,255);
+_assertPixel(canvas, 98,21, 0,255,0,255);
+
+// bottom-right corner
+_assertPixel(canvas, 79,48, 255,0,0,255);
+_assertPixel(canvas, 58,48, 0,255,0,255);
+_assertPixel(canvas, 98,39, 255,0,0,255);
+_assertPixel(canvas, 98,28, 0,255,0,255);
+
+// bottom-left corner
+_assertPixel(canvas, 20,48, 255,0,0,255);
+_assertPixel(canvas, 41,48, 0,255,0,255);
+_assertPixel(canvas, 1,39, 255,0,0,255);
+_assertPixel(canvas, 1,28, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.1.radius.double.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.1.radius.double.html
new file mode 100644
index 0000000000..4761bb5e5e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.1.radius.double.html
@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.roundrect.1.radius.double</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.roundrect.1.radius.double</h1>
+<p class="desc">Verify that when one radius is given to roundRect(), specified as a double, it applies to all corners.</p>
+
+
+<script>
+var t = async_test("Verify that when one radius is given to roundRect(), specified as a double, it applies to all corners.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [20]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+_assertPixel(canvas, 1,1, 255,0,0,255);
+_assertPixel(canvas, 98,1, 255,0,0,255);
+_assertPixel(canvas, 98,48, 255,0,0,255);
+_assertPixel(canvas, 1,48, 255,0,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.1.radius.double.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.1.radius.double.worker.js
new file mode 100644
index 0000000000..57f28c7778
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.1.radius.double.worker.js
@@ -0,0 +1,31 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.roundrect.1.radius.double
+// Description:Verify that when one radius is given to roundRect(), specified as a double, it applies to all corners.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Verify that when one radius is given to roundRect(), specified as a double, it applies to all corners.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [20]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+_assertPixel(canvas, 1,1, 255,0,0,255);
+_assertPixel(canvas, 98,1, 255,0,0,255);
+_assertPixel(canvas, 98,48, 255,0,0,255);
+_assertPixel(canvas, 1,48, 255,0,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.2.radii.1.dompoint.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.2.radii.1.dompoint.html
new file mode 100644
index 0000000000..c96ed08f05
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.2.radii.1.dompoint.html
@@ -0,0 +1,47 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.roundrect.2.radii.1.dompoint</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.roundrect.2.radii.1.dompoint</h1>
+<p class="desc">Verify that when two radii are given to roundRect(), the first radius, specified as a DOMPoint, applies to the top-left and bottom-right corners.</p>
+
+
+<script>
+var t = async_test("Verify that when two radii are given to roundRect(), the first radius, specified as a DOMPoint, applies to the top-left and bottom-right corners.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [new DOMPoint(40, 20), 0]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+
+// top-left corner
+_assertPixel(canvas, 20,1, 255,0,0,255);
+_assertPixel(canvas, 41,1, 0,255,0,255);
+_assertPixel(canvas, 1,10, 255,0,0,255);
+_assertPixel(canvas, 1,21, 0,255,0,255);
+
+// bottom-right corner
+_assertPixel(canvas, 79,48, 255,0,0,255);
+_assertPixel(canvas, 58,48, 0,255,0,255);
+_assertPixel(canvas, 98,39, 255,0,0,255);
+_assertPixel(canvas, 98,28, 0,255,0,255);
+
+// other corners
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.2.radii.1.dompoint.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.2.radii.1.dompoint.worker.js
new file mode 100644
index 0000000000..7e7a4efddc
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.2.radii.1.dompoint.worker.js
@@ -0,0 +1,43 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.roundrect.2.radii.1.dompoint
+// Description:Verify that when two radii are given to roundRect(), the first radius, specified as a DOMPoint, applies to the top-left and bottom-right corners.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Verify that when two radii are given to roundRect(), the first radius, specified as a DOMPoint, applies to the top-left and bottom-right corners.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [new DOMPoint(40, 20), 0]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+
+// top-left corner
+_assertPixel(canvas, 20,1, 255,0,0,255);
+_assertPixel(canvas, 41,1, 0,255,0,255);
+_assertPixel(canvas, 1,10, 255,0,0,255);
+_assertPixel(canvas, 1,21, 0,255,0,255);
+
+// bottom-right corner
+_assertPixel(canvas, 79,48, 255,0,0,255);
+_assertPixel(canvas, 58,48, 0,255,0,255);
+_assertPixel(canvas, 98,39, 255,0,0,255);
+_assertPixel(canvas, 98,28, 0,255,0,255);
+
+// other corners
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.2.radii.1.dompointinit.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.2.radii.1.dompointinit.html
new file mode 100644
index 0000000000..02b889c759
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.2.radii.1.dompointinit.html
@@ -0,0 +1,47 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.roundrect.2.radii.1.dompointinit</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.roundrect.2.radii.1.dompointinit</h1>
+<p class="desc">Verify that when two radii are given to roundRect(), the first radius, specified as a DOMPoint, applies to the top-left and bottomInit-right corners.</p>
+
+
+<script>
+var t = async_test("Verify that when two radii are given to roundRect(), the first radius, specified as a DOMPoint, applies to the top-left and bottomInit-right corners.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [{x: 40, y: 20}, 0]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+
+// top-left corner
+_assertPixel(canvas, 20,1, 255,0,0,255);
+_assertPixel(canvas, 41,1, 0,255,0,255);
+_assertPixel(canvas, 1,10, 255,0,0,255);
+_assertPixel(canvas, 1,21, 0,255,0,255);
+
+// bottom-right corner
+_assertPixel(canvas, 79,48, 255,0,0,255);
+_assertPixel(canvas, 58,48, 0,255,0,255);
+_assertPixel(canvas, 98,39, 255,0,0,255);
+_assertPixel(canvas, 98,28, 0,255,0,255);
+
+// other corners
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.2.radii.1.dompointinit.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.2.radii.1.dompointinit.worker.js
new file mode 100644
index 0000000000..fcc3cb088a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.2.radii.1.dompointinit.worker.js
@@ -0,0 +1,43 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.roundrect.2.radii.1.dompointinit
+// Description:Verify that when two radii are given to roundRect(), the first radius, specified as a DOMPoint, applies to the top-left and bottomInit-right corners.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Verify that when two radii are given to roundRect(), the first radius, specified as a DOMPoint, applies to the top-left and bottomInit-right corners.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [{x: 40, y: 20}, 0]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+
+// top-left corner
+_assertPixel(canvas, 20,1, 255,0,0,255);
+_assertPixel(canvas, 41,1, 0,255,0,255);
+_assertPixel(canvas, 1,10, 255,0,0,255);
+_assertPixel(canvas, 1,21, 0,255,0,255);
+
+// bottom-right corner
+_assertPixel(canvas, 79,48, 255,0,0,255);
+_assertPixel(canvas, 58,48, 0,255,0,255);
+_assertPixel(canvas, 98,39, 255,0,0,255);
+_assertPixel(canvas, 98,28, 0,255,0,255);
+
+// other corners
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.2.radii.1.double.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.2.radii.1.double.html
new file mode 100644
index 0000000000..2a6a030237
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.2.radii.1.double.html
@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.roundrect.2.radii.1.double</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.roundrect.2.radii.1.double</h1>
+<p class="desc">Verify that when two radii are given to roundRect(), the first radius, specified as a double, applies to the top-left and bottom-right corners.</p>
+
+
+<script>
+var t = async_test("Verify that when two radii are given to roundRect(), the first radius, specified as a double, applies to the top-left and bottom-right corners.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [20, 0]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+_assertPixel(canvas, 1,1, 255,0,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 98,48, 255,0,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.2.radii.1.double.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.2.radii.1.double.worker.js
new file mode 100644
index 0000000000..6d4d029b1c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.2.radii.1.double.worker.js
@@ -0,0 +1,31 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.roundrect.2.radii.1.double
+// Description:Verify that when two radii are given to roundRect(), the first radius, specified as a double, applies to the top-left and bottom-right corners.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Verify that when two radii are given to roundRect(), the first radius, specified as a double, applies to the top-left and bottom-right corners.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [20, 0]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+_assertPixel(canvas, 1,1, 255,0,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 98,48, 255,0,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.2.radii.2.dompoint.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.2.radii.2.dompoint.html
new file mode 100644
index 0000000000..bc6e27c683
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.2.radii.2.dompoint.html
@@ -0,0 +1,47 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.roundrect.2.radii.2.dompoint</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.roundrect.2.radii.2.dompoint</h1>
+<p class="desc">Verify that when two radii are given to roundRect(), the second radius, specified as a DOMPoint, applies to the top-right and bottom-left corners.</p>
+
+
+<script>
+var t = async_test("Verify that when two radii are given to roundRect(), the second radius, specified as a DOMPoint, applies to the top-right and bottom-left corners.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [0, new DOMPoint(40, 20)]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+
+// top-right corner
+_assertPixel(canvas, 79,1, 255,0,0,255);
+_assertPixel(canvas, 58,1, 0,255,0,255);
+_assertPixel(canvas, 98,10, 255,0,0,255);
+_assertPixel(canvas, 98,21, 0,255,0,255);
+
+// bottom-left corner
+_assertPixel(canvas, 20,48, 255,0,0,255);
+_assertPixel(canvas, 41,48, 0,255,0,255);
+_assertPixel(canvas, 1,39, 255,0,0,255);
+_assertPixel(canvas, 1,28, 0,255,0,255);
+
+// other corners
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.2.radii.2.dompoint.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.2.radii.2.dompoint.worker.js
new file mode 100644
index 0000000000..fead59e863
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.2.radii.2.dompoint.worker.js
@@ -0,0 +1,43 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.roundrect.2.radii.2.dompoint
+// Description:Verify that when two radii are given to roundRect(), the second radius, specified as a DOMPoint, applies to the top-right and bottom-left corners.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Verify that when two radii are given to roundRect(), the second radius, specified as a DOMPoint, applies to the top-right and bottom-left corners.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [0, new DOMPoint(40, 20)]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+
+// top-right corner
+_assertPixel(canvas, 79,1, 255,0,0,255);
+_assertPixel(canvas, 58,1, 0,255,0,255);
+_assertPixel(canvas, 98,10, 255,0,0,255);
+_assertPixel(canvas, 98,21, 0,255,0,255);
+
+// bottom-left corner
+_assertPixel(canvas, 20,48, 255,0,0,255);
+_assertPixel(canvas, 41,48, 0,255,0,255);
+_assertPixel(canvas, 1,39, 255,0,0,255);
+_assertPixel(canvas, 1,28, 0,255,0,255);
+
+// other corners
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.2.radii.2.dompointinit.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.2.radii.2.dompointinit.html
new file mode 100644
index 0000000000..fcca1c739f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.2.radii.2.dompointinit.html
@@ -0,0 +1,47 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.roundrect.2.radii.2.dompointinit</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.roundrect.2.radii.2.dompointinit</h1>
+<p class="desc">Verify that when two radii are given to roundRect(), the second radius, specified as a DOMPoint, applies to the top-right and bottomInit-left corners.</p>
+
+
+<script>
+var t = async_test("Verify that when two radii are given to roundRect(), the second radius, specified as a DOMPoint, applies to the top-right and bottomInit-left corners.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [0, {x: 40, y: 20}]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+
+// top-right corner
+_assertPixel(canvas, 79,1, 255,0,0,255);
+_assertPixel(canvas, 58,1, 0,255,0,255);
+_assertPixel(canvas, 98,10, 255,0,0,255);
+_assertPixel(canvas, 98,21, 0,255,0,255);
+
+// bottom-left corner
+_assertPixel(canvas, 20,48, 255,0,0,255);
+_assertPixel(canvas, 41,48, 0,255,0,255);
+_assertPixel(canvas, 1,39, 255,0,0,255);
+_assertPixel(canvas, 1,28, 0,255,0,255);
+
+// other corners
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.2.radii.2.dompointinit.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.2.radii.2.dompointinit.worker.js
new file mode 100644
index 0000000000..ab334e4ca0
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.2.radii.2.dompointinit.worker.js
@@ -0,0 +1,43 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.roundrect.2.radii.2.dompointinit
+// Description:Verify that when two radii are given to roundRect(), the second radius, specified as a DOMPoint, applies to the top-right and bottomInit-left corners.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Verify that when two radii are given to roundRect(), the second radius, specified as a DOMPoint, applies to the top-right and bottomInit-left corners.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [0, {x: 40, y: 20}]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+
+// top-right corner
+_assertPixel(canvas, 79,1, 255,0,0,255);
+_assertPixel(canvas, 58,1, 0,255,0,255);
+_assertPixel(canvas, 98,10, 255,0,0,255);
+_assertPixel(canvas, 98,21, 0,255,0,255);
+
+// bottom-left corner
+_assertPixel(canvas, 20,48, 255,0,0,255);
+_assertPixel(canvas, 41,48, 0,255,0,255);
+_assertPixel(canvas, 1,39, 255,0,0,255);
+_assertPixel(canvas, 1,28, 0,255,0,255);
+
+// other corners
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.2.radii.2.double.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.2.radii.2.double.html
new file mode 100644
index 0000000000..2bc6737566
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.2.radii.2.double.html
@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.roundrect.2.radii.2.double</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.roundrect.2.radii.2.double</h1>
+<p class="desc">Verify that when two radii are given to roundRect(), the second radius, specified as a double, applies to the top-right and bottom-left corners.</p>
+
+
+<script>
+var t = async_test("Verify that when two radii are given to roundRect(), the second radius, specified as a double, applies to the top-right and bottom-left corners.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [0, 20]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 255,0,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+_assertPixel(canvas, 1,48, 255,0,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.2.radii.2.double.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.2.radii.2.double.worker.js
new file mode 100644
index 0000000000..d355852a5c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.2.radii.2.double.worker.js
@@ -0,0 +1,31 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.roundrect.2.radii.2.double
+// Description:Verify that when two radii are given to roundRect(), the second radius, specified as a double, applies to the top-right and bottom-left corners.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Verify that when two radii are given to roundRect(), the second radius, specified as a double, applies to the top-right and bottom-left corners.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [0, 20]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 255,0,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+_assertPixel(canvas, 1,48, 255,0,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.3.radii.1.dompoint.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.3.radii.1.dompoint.html
new file mode 100644
index 0000000000..f3388e6562
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.3.radii.1.dompoint.html
@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.roundrect.3.radii.1.dompoint</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.roundrect.3.radii.1.dompoint</h1>
+<p class="desc">Verify that when three radii are given to roundRect(), the first radius, specified as a DOMPoint, applies to the top-left corner.</p>
+
+
+<script>
+var t = async_test("Verify that when three radii are given to roundRect(), the first radius, specified as a DOMPoint, applies to the top-left corner.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [new DOMPoint(40, 20), 0, 0]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+
+// top-left corner
+_assertPixel(canvas, 20,1, 255,0,0,255);
+_assertPixel(canvas, 41,1, 0,255,0,255);
+_assertPixel(canvas, 1,10, 255,0,0,255);
+_assertPixel(canvas, 1,21, 0,255,0,255);
+
+// other corners
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.3.radii.1.dompoint.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.3.radii.1.dompoint.worker.js
new file mode 100644
index 0000000000..36c6401bf3
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.3.radii.1.dompoint.worker.js
@@ -0,0 +1,38 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.roundrect.3.radii.1.dompoint
+// Description:Verify that when three radii are given to roundRect(), the first radius, specified as a DOMPoint, applies to the top-left corner.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Verify that when three radii are given to roundRect(), the first radius, specified as a DOMPoint, applies to the top-left corner.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [new DOMPoint(40, 20), 0, 0]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+
+// top-left corner
+_assertPixel(canvas, 20,1, 255,0,0,255);
+_assertPixel(canvas, 41,1, 0,255,0,255);
+_assertPixel(canvas, 1,10, 255,0,0,255);
+_assertPixel(canvas, 1,21, 0,255,0,255);
+
+// other corners
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.3.radii.1.dompointinit.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.3.radii.1.dompointinit.html
new file mode 100644
index 0000000000..dd96e859ea
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.3.radii.1.dompointinit.html
@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.roundrect.3.radii.1.dompointinit</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.roundrect.3.radii.1.dompointinit</h1>
+<p class="desc">Verify that when three radii are given to roundRect(), the first radius, specified as a DOMPointInit, applies to the top-left corner.</p>
+
+
+<script>
+var t = async_test("Verify that when three radii are given to roundRect(), the first radius, specified as a DOMPointInit, applies to the top-left corner.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [{x: 40, y: 20}, 0, 0]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+
+// top-left corner
+_assertPixel(canvas, 20,1, 255,0,0,255);
+_assertPixel(canvas, 41,1, 0,255,0,255);
+_assertPixel(canvas, 1,10, 255,0,0,255);
+_assertPixel(canvas, 1,21, 0,255,0,255);
+
+// other corners
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.3.radii.1.dompointinit.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.3.radii.1.dompointinit.worker.js
new file mode 100644
index 0000000000..a497d5788b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.3.radii.1.dompointinit.worker.js
@@ -0,0 +1,38 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.roundrect.3.radii.1.dompointinit
+// Description:Verify that when three radii are given to roundRect(), the first radius, specified as a DOMPointInit, applies to the top-left corner.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Verify that when three radii are given to roundRect(), the first radius, specified as a DOMPointInit, applies to the top-left corner.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [{x: 40, y: 20}, 0, 0]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+
+// top-left corner
+_assertPixel(canvas, 20,1, 255,0,0,255);
+_assertPixel(canvas, 41,1, 0,255,0,255);
+_assertPixel(canvas, 1,10, 255,0,0,255);
+_assertPixel(canvas, 1,21, 0,255,0,255);
+
+// other corners
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.3.radii.1.double.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.3.radii.1.double.html
new file mode 100644
index 0000000000..4c5f57122c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.3.radii.1.double.html
@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.roundrect.3.radii.1.double</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.roundrect.3.radii.1.double</h1>
+<p class="desc">Verify that when three radii are given to roundRect(), the first radius, specified as a double, applies to the top-left corner.</p>
+
+
+<script>
+var t = async_test("Verify that when three radii are given to roundRect(), the first radius, specified as a double, applies to the top-left corner.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [20, 0, 0]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+_assertPixel(canvas, 1,1, 255,0,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.3.radii.1.double.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.3.radii.1.double.worker.js
new file mode 100644
index 0000000000..171a2ae5e6
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.3.radii.1.double.worker.js
@@ -0,0 +1,31 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.roundrect.3.radii.1.double
+// Description:Verify that when three radii are given to roundRect(), the first radius, specified as a double, applies to the top-left corner.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Verify that when three radii are given to roundRect(), the first radius, specified as a double, applies to the top-left corner.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [20, 0, 0]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+_assertPixel(canvas, 1,1, 255,0,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.3.radii.2.dompoint.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.3.radii.2.dompoint.html
new file mode 100644
index 0000000000..3459ac27bb
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.3.radii.2.dompoint.html
@@ -0,0 +1,47 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.roundrect.3.radii.2.dompoint</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.roundrect.3.radii.2.dompoint</h1>
+<p class="desc">Verify that when three radii are given to roundRect(), the second radius, specified as a DOMPoint, applies to the top-right and bottom-left corners.</p>
+
+
+<script>
+var t = async_test("Verify that when three radii are given to roundRect(), the second radius, specified as a DOMPoint, applies to the top-right and bottom-left corners.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [0, new DOMPoint(40, 20), 0]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+
+// top-right corner
+_assertPixel(canvas, 79,1, 255,0,0,255);
+_assertPixel(canvas, 58,1, 0,255,0,255);
+_assertPixel(canvas, 98,10, 255,0,0,255);
+_assertPixel(canvas, 98,21, 0,255,0,255);
+
+// bottom-left corner
+_assertPixel(canvas, 20,48, 255,0,0,255);
+_assertPixel(canvas, 41,48, 0,255,0,255);
+_assertPixel(canvas, 1,39, 255,0,0,255);
+_assertPixel(canvas, 1,28, 0,255,0,255);
+
+// other corners
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.3.radii.2.dompoint.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.3.radii.2.dompoint.worker.js
new file mode 100644
index 0000000000..9588780f97
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.3.radii.2.dompoint.worker.js
@@ -0,0 +1,43 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.roundrect.3.radii.2.dompoint
+// Description:Verify that when three radii are given to roundRect(), the second radius, specified as a DOMPoint, applies to the top-right and bottom-left corners.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Verify that when three radii are given to roundRect(), the second radius, specified as a DOMPoint, applies to the top-right and bottom-left corners.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [0, new DOMPoint(40, 20), 0]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+
+// top-right corner
+_assertPixel(canvas, 79,1, 255,0,0,255);
+_assertPixel(canvas, 58,1, 0,255,0,255);
+_assertPixel(canvas, 98,10, 255,0,0,255);
+_assertPixel(canvas, 98,21, 0,255,0,255);
+
+// bottom-left corner
+_assertPixel(canvas, 20,48, 255,0,0,255);
+_assertPixel(canvas, 41,48, 0,255,0,255);
+_assertPixel(canvas, 1,39, 255,0,0,255);
+_assertPixel(canvas, 1,28, 0,255,0,255);
+
+// other corners
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.3.radii.2.dompointinit.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.3.radii.2.dompointinit.html
new file mode 100644
index 0000000000..6476be489f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.3.radii.2.dompointinit.html
@@ -0,0 +1,47 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.roundrect.3.radii.2.dompointinit</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.roundrect.3.radii.2.dompointinit</h1>
+<p class="desc">Verify that when three radii are given to roundRect(), the second radius, specified as a DOMPoint, applies to the top-right and bottomInit-left corners.</p>
+
+
+<script>
+var t = async_test("Verify that when three radii are given to roundRect(), the second radius, specified as a DOMPoint, applies to the top-right and bottomInit-left corners.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [0, {x: 40, y: 20}, 0]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+
+// top-right corner
+_assertPixel(canvas, 79,1, 255,0,0,255);
+_assertPixel(canvas, 58,1, 0,255,0,255);
+_assertPixel(canvas, 98,10, 255,0,0,255);
+_assertPixel(canvas, 98,21, 0,255,0,255);
+
+// bottom-left corner
+_assertPixel(canvas, 20,48, 255,0,0,255);
+_assertPixel(canvas, 41,48, 0,255,0,255);
+_assertPixel(canvas, 1,39, 255,0,0,255);
+_assertPixel(canvas, 1,28, 0,255,0,255);
+
+// other corners
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.3.radii.2.dompointinit.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.3.radii.2.dompointinit.worker.js
new file mode 100644
index 0000000000..42dead8509
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.3.radii.2.dompointinit.worker.js
@@ -0,0 +1,43 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.roundrect.3.radii.2.dompointinit
+// Description:Verify that when three radii are given to roundRect(), the second radius, specified as a DOMPoint, applies to the top-right and bottomInit-left corners.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Verify that when three radii are given to roundRect(), the second radius, specified as a DOMPoint, applies to the top-right and bottomInit-left corners.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [0, {x: 40, y: 20}, 0]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+
+// top-right corner
+_assertPixel(canvas, 79,1, 255,0,0,255);
+_assertPixel(canvas, 58,1, 0,255,0,255);
+_assertPixel(canvas, 98,10, 255,0,0,255);
+_assertPixel(canvas, 98,21, 0,255,0,255);
+
+// bottom-left corner
+_assertPixel(canvas, 20,48, 255,0,0,255);
+_assertPixel(canvas, 41,48, 0,255,0,255);
+_assertPixel(canvas, 1,39, 255,0,0,255);
+_assertPixel(canvas, 1,28, 0,255,0,255);
+
+// other corners
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.3.radii.2.double.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.3.radii.2.double.html
new file mode 100644
index 0000000000..652745e0be
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.3.radii.2.double.html
@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.roundrect.3.radii.2.double</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.roundrect.3.radii.2.double</h1>
+<p class="desc">Verify that when three radii are given to roundRect(), the second radius, specified as a double, applies to the top-right and bottom-left corners.</p>
+
+
+<script>
+var t = async_test("Verify that when three radii are given to roundRect(), the second radius, specified as a double, applies to the top-right and bottom-left corners.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [0, 20, 0]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 255,0,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+_assertPixel(canvas, 1,48, 255,0,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.3.radii.2.double.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.3.radii.2.double.worker.js
new file mode 100644
index 0000000000..e3929fbfdb
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.3.radii.2.double.worker.js
@@ -0,0 +1,31 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.roundrect.3.radii.2.double
+// Description:Verify that when three radii are given to roundRect(), the second radius, specified as a double, applies to the top-right and bottom-left corners.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Verify that when three radii are given to roundRect(), the second radius, specified as a double, applies to the top-right and bottom-left corners.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [0, 20, 0]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 255,0,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+_assertPixel(canvas, 1,48, 255,0,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.3.radii.3.dompoint.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.3.radii.3.dompoint.html
new file mode 100644
index 0000000000..1c295143c8
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.3.radii.3.dompoint.html
@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.roundrect.3.radii.3.dompoint</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.roundrect.3.radii.3.dompoint</h1>
+<p class="desc">Verify that when three radii are given to roundRect(), the third radius, specified as a DOMPoint, applies to the bottom-right corner.</p>
+
+
+<script>
+var t = async_test("Verify that when three radii are given to roundRect(), the third radius, specified as a DOMPoint, applies to the bottom-right corner.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [0, 0, new DOMPoint(40, 20)]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+
+// bottom-right corner
+_assertPixel(canvas, 79,48, 255,0,0,255);
+_assertPixel(canvas, 58,48, 0,255,0,255);
+_assertPixel(canvas, 98,39, 255,0,0,255);
+_assertPixel(canvas, 98,28, 0,255,0,255);
+
+// other corners
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.3.radii.3.dompoint.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.3.radii.3.dompoint.worker.js
new file mode 100644
index 0000000000..c8e08ec297
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.3.radii.3.dompoint.worker.js
@@ -0,0 +1,38 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.roundrect.3.radii.3.dompoint
+// Description:Verify that when three radii are given to roundRect(), the third radius, specified as a DOMPoint, applies to the bottom-right corner.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Verify that when three radii are given to roundRect(), the third radius, specified as a DOMPoint, applies to the bottom-right corner.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [0, 0, new DOMPoint(40, 20)]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+
+// bottom-right corner
+_assertPixel(canvas, 79,48, 255,0,0,255);
+_assertPixel(canvas, 58,48, 0,255,0,255);
+_assertPixel(canvas, 98,39, 255,0,0,255);
+_assertPixel(canvas, 98,28, 0,255,0,255);
+
+// other corners
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.3.radii.3.dompointinit.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.3.radii.3.dompointinit.html
new file mode 100644
index 0000000000..f8e62a5bf6
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.3.radii.3.dompointinit.html
@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.roundrect.3.radii.3.dompointinit</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.roundrect.3.radii.3.dompointinit</h1>
+<p class="desc">Verify that when three radii are given to roundRect(), the third radius, specified as a DOMPointInit, applies to the bottom-right corner.</p>
+
+
+<script>
+var t = async_test("Verify that when three radii are given to roundRect(), the third radius, specified as a DOMPointInit, applies to the bottom-right corner.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [0, 0, {x: 40, y: 20}]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+
+// bottom-right corner
+_assertPixel(canvas, 79,48, 255,0,0,255);
+_assertPixel(canvas, 58,48, 0,255,0,255);
+_assertPixel(canvas, 98,39, 255,0,0,255);
+_assertPixel(canvas, 98,28, 0,255,0,255);
+
+// other corners
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.3.radii.3.dompointinit.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.3.radii.3.dompointinit.worker.js
new file mode 100644
index 0000000000..0fe2b89877
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.3.radii.3.dompointinit.worker.js
@@ -0,0 +1,38 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.roundrect.3.radii.3.dompointinit
+// Description:Verify that when three radii are given to roundRect(), the third radius, specified as a DOMPointInit, applies to the bottom-right corner.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Verify that when three radii are given to roundRect(), the third radius, specified as a DOMPointInit, applies to the bottom-right corner.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [0, 0, {x: 40, y: 20}]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+
+// bottom-right corner
+_assertPixel(canvas, 79,48, 255,0,0,255);
+_assertPixel(canvas, 58,48, 0,255,0,255);
+_assertPixel(canvas, 98,39, 255,0,0,255);
+_assertPixel(canvas, 98,28, 0,255,0,255);
+
+// other corners
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.3.radii.3.double.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.3.radii.3.double.html
new file mode 100644
index 0000000000..ff1301d9cd
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.3.radii.3.double.html
@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.roundrect.3.radii.3.double</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.roundrect.3.radii.3.double</h1>
+<p class="desc">Verify that when three radii are given to roundRect(), the third radius, specified as a double, applies to the bottom-right corner.</p>
+
+
+<script>
+var t = async_test("Verify that when three radii are given to roundRect(), the third radius, specified as a double, applies to the bottom-right corner.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [0, 0, 20]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 98,48, 255,0,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.3.radii.3.double.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.3.radii.3.double.worker.js
new file mode 100644
index 0000000000..2422435d52
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.3.radii.3.double.worker.js
@@ -0,0 +1,31 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.roundrect.3.radii.3.double
+// Description:Verify that when three radii are given to roundRect(), the third radius, specified as a double, applies to the bottom-right corner.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Verify that when three radii are given to roundRect(), the third radius, specified as a double, applies to the bottom-right corner.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [0, 0, 20]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 98,48, 255,0,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.1.dompoint.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.1.dompoint.html
new file mode 100644
index 0000000000..3110983f7f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.1.dompoint.html
@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.roundrect.4.radii.1.dompoint</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.roundrect.4.radii.1.dompoint</h1>
+<p class="desc">Verify that when four radii are given to roundRect(), the first radius, specified as a DOMPoint, applies to the top-left corner.</p>
+
+
+<script>
+var t = async_test("Verify that when four radii are given to roundRect(), the first radius, specified as a DOMPoint, applies to the top-left corner.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [new DOMPoint(40, 20), 0, 0, 0]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+
+// top-left corner
+_assertPixel(canvas, 20,1, 255,0,0,255);
+_assertPixel(canvas, 41,1, 0,255,0,255);
+_assertPixel(canvas, 1,10, 255,0,0,255);
+_assertPixel(canvas, 1,21, 0,255,0,255);
+
+// other corners
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.1.dompoint.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.1.dompoint.worker.js
new file mode 100644
index 0000000000..3bdb12e029
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.1.dompoint.worker.js
@@ -0,0 +1,38 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.roundrect.4.radii.1.dompoint
+// Description:Verify that when four radii are given to roundRect(), the first radius, specified as a DOMPoint, applies to the top-left corner.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Verify that when four radii are given to roundRect(), the first radius, specified as a DOMPoint, applies to the top-left corner.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [new DOMPoint(40, 20), 0, 0, 0]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+
+// top-left corner
+_assertPixel(canvas, 20,1, 255,0,0,255);
+_assertPixel(canvas, 41,1, 0,255,0,255);
+_assertPixel(canvas, 1,10, 255,0,0,255);
+_assertPixel(canvas, 1,21, 0,255,0,255);
+
+// other corners
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.1.dompointinit.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.1.dompointinit.html
new file mode 100644
index 0000000000..976b39a102
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.1.dompointinit.html
@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.roundrect.4.radii.1.dompointinit</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.roundrect.4.radii.1.dompointinit</h1>
+<p class="desc">Verify that when four radii are given to roundRect(), the first radius, specified as a DOMPointInit, applies to the top-left corner.</p>
+
+
+<script>
+var t = async_test("Verify that when four radii are given to roundRect(), the first radius, specified as a DOMPointInit, applies to the top-left corner.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [{x: 40, y: 20}, 0, 0, 0]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+
+// top-left corner
+_assertPixel(canvas, 20,1, 255,0,0,255);
+_assertPixel(canvas, 41,1, 0,255,0,255);
+_assertPixel(canvas, 1,10, 255,0,0,255);
+_assertPixel(canvas, 1,21, 0,255,0,255);
+
+// other corners
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.1.dompointinit.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.1.dompointinit.worker.js
new file mode 100644
index 0000000000..86b43ad2a1
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.1.dompointinit.worker.js
@@ -0,0 +1,38 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.roundrect.4.radii.1.dompointinit
+// Description:Verify that when four radii are given to roundRect(), the first radius, specified as a DOMPointInit, applies to the top-left corner.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Verify that when four radii are given to roundRect(), the first radius, specified as a DOMPointInit, applies to the top-left corner.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [{x: 40, y: 20}, 0, 0, 0]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+
+// top-left corner
+_assertPixel(canvas, 20,1, 255,0,0,255);
+_assertPixel(canvas, 41,1, 0,255,0,255);
+_assertPixel(canvas, 1,10, 255,0,0,255);
+_assertPixel(canvas, 1,21, 0,255,0,255);
+
+// other corners
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.1.double.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.1.double.html
new file mode 100644
index 0000000000..c75d6420c9
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.1.double.html
@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.roundrect.4.radii.1.double</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.roundrect.4.radii.1.double</h1>
+<p class="desc">Verify that when four radii are given to roundRect(), the first radius, specified as a double, applies to the top-left corner.</p>
+
+
+<script>
+var t = async_test("Verify that when four radii are given to roundRect(), the first radius, specified as a double, applies to the top-left corner.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [20, 0, 0, 0]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+_assertPixel(canvas, 1,1, 255,0,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.1.double.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.1.double.worker.js
new file mode 100644
index 0000000000..925c93b0c9
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.1.double.worker.js
@@ -0,0 +1,31 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.roundrect.4.radii.1.double
+// Description:Verify that when four radii are given to roundRect(), the first radius, specified as a double, applies to the top-left corner.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Verify that when four radii are given to roundRect(), the first radius, specified as a double, applies to the top-left corner.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [20, 0, 0, 0]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+_assertPixel(canvas, 1,1, 255,0,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.2.dompoint.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.2.dompoint.html
new file mode 100644
index 0000000000..33d861d6dc
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.2.dompoint.html
@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.roundrect.4.radii.2.dompoint</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.roundrect.4.radii.2.dompoint</h1>
+<p class="desc">Verify that when four radii are given to roundRect(), the second radius, specified as a DOMPoint, applies to the top-right corner.</p>
+
+
+<script>
+var t = async_test("Verify that when four radii are given to roundRect(), the second radius, specified as a DOMPoint, applies to the top-right corner.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [0, new DOMPoint(40, 20), 0, 0]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+
+// top-right corner
+_assertPixel(canvas, 79,1, 255,0,0,255);
+_assertPixel(canvas, 58,1, 0,255,0,255);
+_assertPixel(canvas, 98,10, 255,0,0,255);
+_assertPixel(canvas, 98,21, 0,255,0,255);
+
+// other corners
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.2.dompoint.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.2.dompoint.worker.js
new file mode 100644
index 0000000000..12d1a8c8e6
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.2.dompoint.worker.js
@@ -0,0 +1,38 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.roundrect.4.radii.2.dompoint
+// Description:Verify that when four radii are given to roundRect(), the second radius, specified as a DOMPoint, applies to the top-right corner.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Verify that when four radii are given to roundRect(), the second radius, specified as a DOMPoint, applies to the top-right corner.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [0, new DOMPoint(40, 20), 0, 0]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+
+// top-right corner
+_assertPixel(canvas, 79,1, 255,0,0,255);
+_assertPixel(canvas, 58,1, 0,255,0,255);
+_assertPixel(canvas, 98,10, 255,0,0,255);
+_assertPixel(canvas, 98,21, 0,255,0,255);
+
+// other corners
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.2.dompointinit.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.2.dompointinit.html
new file mode 100644
index 0000000000..b088c2e717
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.2.dompointinit.html
@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.roundrect.4.radii.2.dompointinit</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.roundrect.4.radii.2.dompointinit</h1>
+<p class="desc">Verify that when four radii are given to roundRect(), the second radius, specified as a DOMPointInit, applies to the top-right corner.</p>
+
+
+<script>
+var t = async_test("Verify that when four radii are given to roundRect(), the second radius, specified as a DOMPointInit, applies to the top-right corner.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [0, {x: 40, y: 20}, 0, 0]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+
+// top-right corner
+_assertPixel(canvas, 79,1, 255,0,0,255);
+_assertPixel(canvas, 58,1, 0,255,0,255);
+_assertPixel(canvas, 98,10, 255,0,0,255);
+_assertPixel(canvas, 98,21, 0,255,0,255);
+
+// other corners
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.2.dompointinit.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.2.dompointinit.worker.js
new file mode 100644
index 0000000000..49a247a266
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.2.dompointinit.worker.js
@@ -0,0 +1,38 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.roundrect.4.radii.2.dompointinit
+// Description:Verify that when four radii are given to roundRect(), the second radius, specified as a DOMPointInit, applies to the top-right corner.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Verify that when four radii are given to roundRect(), the second radius, specified as a DOMPointInit, applies to the top-right corner.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [0, {x: 40, y: 20}, 0, 0]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+
+// top-right corner
+_assertPixel(canvas, 79,1, 255,0,0,255);
+_assertPixel(canvas, 58,1, 0,255,0,255);
+_assertPixel(canvas, 98,10, 255,0,0,255);
+_assertPixel(canvas, 98,21, 0,255,0,255);
+
+// other corners
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.2.double.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.2.double.html
new file mode 100644
index 0000000000..71395e0e9e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.2.double.html
@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.roundrect.4.radii.2.double</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.roundrect.4.radii.2.double</h1>
+<p class="desc">Verify that when four radii are given to roundRect(), the second radius, specified as a double, applies to the top-right corner.</p>
+
+
+<script>
+var t = async_test("Verify that when four radii are given to roundRect(), the second radius, specified as a double, applies to the top-right corner.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [0, 20, 0, 0]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 255,0,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.2.double.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.2.double.worker.js
new file mode 100644
index 0000000000..f868c6272e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.2.double.worker.js
@@ -0,0 +1,31 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.roundrect.4.radii.2.double
+// Description:Verify that when four radii are given to roundRect(), the second radius, specified as a double, applies to the top-right corner.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Verify that when four radii are given to roundRect(), the second radius, specified as a double, applies to the top-right corner.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [0, 20, 0, 0]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 255,0,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.3.dompoint.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.3.dompoint.html
new file mode 100644
index 0000000000..4922bf37f2
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.3.dompoint.html
@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.roundrect.4.radii.3.dompoint</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.roundrect.4.radii.3.dompoint</h1>
+<p class="desc">Verify that when four radii are given to roundRect(), the third radius, specified as a DOMPoint, applies to the bottom-right corner.</p>
+
+
+<script>
+var t = async_test("Verify that when four radii are given to roundRect(), the third radius, specified as a DOMPoint, applies to the bottom-right corner.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [0, 0, new DOMPoint(40, 20), 0]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+
+// bottom-right corner
+_assertPixel(canvas, 79,48, 255,0,0,255);
+_assertPixel(canvas, 58,48, 0,255,0,255);
+_assertPixel(canvas, 98,39, 255,0,0,255);
+_assertPixel(canvas, 98,28, 0,255,0,255);
+
+// other corners
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.3.dompoint.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.3.dompoint.worker.js
new file mode 100644
index 0000000000..2da2f3591c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.3.dompoint.worker.js
@@ -0,0 +1,38 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.roundrect.4.radii.3.dompoint
+// Description:Verify that when four radii are given to roundRect(), the third radius, specified as a DOMPoint, applies to the bottom-right corner.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Verify that when four radii are given to roundRect(), the third radius, specified as a DOMPoint, applies to the bottom-right corner.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [0, 0, new DOMPoint(40, 20), 0]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+
+// bottom-right corner
+_assertPixel(canvas, 79,48, 255,0,0,255);
+_assertPixel(canvas, 58,48, 0,255,0,255);
+_assertPixel(canvas, 98,39, 255,0,0,255);
+_assertPixel(canvas, 98,28, 0,255,0,255);
+
+// other corners
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.3.dompointinit.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.3.dompointinit.html
new file mode 100644
index 0000000000..3b6f2fd863
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.3.dompointinit.html
@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.roundrect.4.radii.3.dompointinit</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.roundrect.4.radii.3.dompointinit</h1>
+<p class="desc">Verify that when four radii are given to roundRect(), the third radius, specified as a DOMPointInit, applies to the bottom-right corner.</p>
+
+
+<script>
+var t = async_test("Verify that when four radii are given to roundRect(), the third radius, specified as a DOMPointInit, applies to the bottom-right corner.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [0, 0, {x: 40, y: 20}, 0]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+
+// bottom-right corner
+_assertPixel(canvas, 79,48, 255,0,0,255);
+_assertPixel(canvas, 58,48, 0,255,0,255);
+_assertPixel(canvas, 98,39, 255,0,0,255);
+_assertPixel(canvas, 98,28, 0,255,0,255);
+
+// other corners
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.3.dompointinit.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.3.dompointinit.worker.js
new file mode 100644
index 0000000000..65a3feb36f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.3.dompointinit.worker.js
@@ -0,0 +1,38 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.roundrect.4.radii.3.dompointinit
+// Description:Verify that when four radii are given to roundRect(), the third radius, specified as a DOMPointInit, applies to the bottom-right corner.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Verify that when four radii are given to roundRect(), the third radius, specified as a DOMPointInit, applies to the bottom-right corner.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [0, 0, {x: 40, y: 20}, 0]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+
+// bottom-right corner
+_assertPixel(canvas, 79,48, 255,0,0,255);
+_assertPixel(canvas, 58,48, 0,255,0,255);
+_assertPixel(canvas, 98,39, 255,0,0,255);
+_assertPixel(canvas, 98,28, 0,255,0,255);
+
+// other corners
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.3.double.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.3.double.html
new file mode 100644
index 0000000000..3dd2af9800
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.3.double.html
@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.roundrect.4.radii.3.double</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.roundrect.4.radii.3.double</h1>
+<p class="desc">Verify that when four radii are given to roundRect(), the third radius, specified as a double, applies to the bottom-right corner.</p>
+
+
+<script>
+var t = async_test("Verify that when four radii are given to roundRect(), the third radius, specified as a double, applies to the bottom-right corner.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [0, 0, 20, 0]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 98,48, 255,0,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.3.double.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.3.double.worker.js
new file mode 100644
index 0000000000..a327ceac15
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.3.double.worker.js
@@ -0,0 +1,31 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.roundrect.4.radii.3.double
+// Description:Verify that when four radii are given to roundRect(), the third radius, specified as a double, applies to the bottom-right corner.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Verify that when four radii are given to roundRect(), the third radius, specified as a double, applies to the bottom-right corner.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [0, 0, 20, 0]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 98,48, 255,0,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.4.dompoint.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.4.dompoint.html
new file mode 100644
index 0000000000..d61a3133cc
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.4.dompoint.html
@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.roundrect.4.radii.4.dompoint</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.roundrect.4.radii.4.dompoint</h1>
+<p class="desc">Verify that when four radii are given to roundRect(), the fourth radius, specified as a DOMPoint, applies to the bottom-left corner.</p>
+
+
+<script>
+var t = async_test("Verify that when four radii are given to roundRect(), the fourth radius, specified as a DOMPoint, applies to the bottom-left corner.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [0, 0, 0, new DOMPoint(40, 20)]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+
+// bottom-left corner
+_assertPixel(canvas, 20,48, 255,0,0,255);
+_assertPixel(canvas, 41,48, 0,255,0,255);
+_assertPixel(canvas, 1,39, 255,0,0,255);
+_assertPixel(canvas, 1,28, 0,255,0,255);
+
+// other corners
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.4.dompoint.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.4.dompoint.worker.js
new file mode 100644
index 0000000000..d8a121e6da
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.4.dompoint.worker.js
@@ -0,0 +1,38 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.roundrect.4.radii.4.dompoint
+// Description:Verify that when four radii are given to roundRect(), the fourth radius, specified as a DOMPoint, applies to the bottom-left corner.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Verify that when four radii are given to roundRect(), the fourth radius, specified as a DOMPoint, applies to the bottom-left corner.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [0, 0, 0, new DOMPoint(40, 20)]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+
+// bottom-left corner
+_assertPixel(canvas, 20,48, 255,0,0,255);
+_assertPixel(canvas, 41,48, 0,255,0,255);
+_assertPixel(canvas, 1,39, 255,0,0,255);
+_assertPixel(canvas, 1,28, 0,255,0,255);
+
+// other corners
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.4.dompointinit.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.4.dompointinit.html
new file mode 100644
index 0000000000..94ffc00433
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.4.dompointinit.html
@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.roundrect.4.radii.4.dompointinit</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.roundrect.4.radii.4.dompointinit</h1>
+<p class="desc">Verify that when four radii are given to roundRect(), the fourth radius, specified as a DOMPointInit, applies to the bottom-left corner.</p>
+
+
+<script>
+var t = async_test("Verify that when four radii are given to roundRect(), the fourth radius, specified as a DOMPointInit, applies to the bottom-left corner.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [0, 0, 0, {x: 40, y: 20}]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+
+// bottom-left corner
+_assertPixel(canvas, 20,48, 255,0,0,255);
+_assertPixel(canvas, 41,48, 0,255,0,255);
+_assertPixel(canvas, 1,39, 255,0,0,255);
+_assertPixel(canvas, 1,28, 0,255,0,255);
+
+// other corners
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.4.dompointinit.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.4.dompointinit.worker.js
new file mode 100644
index 0000000000..b7babb5296
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.4.dompointinit.worker.js
@@ -0,0 +1,38 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.roundrect.4.radii.4.dompointinit
+// Description:Verify that when four radii are given to roundRect(), the fourth radius, specified as a DOMPointInit, applies to the bottom-left corner.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Verify that when four radii are given to roundRect(), the fourth radius, specified as a DOMPointInit, applies to the bottom-left corner.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [0, 0, 0, {x: 40, y: 20}]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+
+// bottom-left corner
+_assertPixel(canvas, 20,48, 255,0,0,255);
+_assertPixel(canvas, 41,48, 0,255,0,255);
+_assertPixel(canvas, 1,39, 255,0,0,255);
+_assertPixel(canvas, 1,28, 0,255,0,255);
+
+// other corners
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.4.double.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.4.double.html
new file mode 100644
index 0000000000..4ab2581847
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.4.double.html
@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.roundrect.4.radii.4.double</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.roundrect.4.radii.4.double</h1>
+<p class="desc">Verify that when four radii are given to roundRect(), the fourth radius, specified as a double, applies to the bottom-left corner.</p>
+
+
+<script>
+var t = async_test("Verify that when four radii are given to roundRect(), the fourth radius, specified as a double, applies to the bottom-left corner.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [0, 0, 0, 20]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+_assertPixel(canvas, 1,48, 255,0,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.4.double.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.4.double.worker.js
new file mode 100644
index 0000000000..ad4cca4953
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.4.radii.4.double.worker.js
@@ -0,0 +1,31 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.roundrect.4.radii.4.double
+// Description:Verify that when four radii are given to roundRect(), the fourth radius, specified as a double, applies to the bottom-left corner.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Verify that when four radii are given to roundRect(), the fourth radius, specified as a double, applies to the bottom-left corner.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [0, 0, 0, 20]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+_assertPixel(canvas, 1,48, 255,0,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.closed.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.closed.html
new file mode 100644
index 0000000000..1b4abf012c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.closed.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.roundrect.closed</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.roundrect.closed</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 200;
+ctx.lineJoin = 'miter';
+ctx.roundRect(100, 50, 100, 100, [0]);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.closed.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.closed.worker.js
new file mode 100644
index 0000000000..e0f1b81aa4
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.closed.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.roundrect.closed
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 200;
+ctx.lineJoin = 'miter';
+ctx.roundRect(100, 50, 100, 100, [0]);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.end.1.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.end.1.html
new file mode 100644
index 0000000000..5c6b3cd537
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.end.1.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.roundrect.end.1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.roundrect.end.1</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 100;
+ctx.roundRect(200, 100, 400, 1000, [0]);
+ctx.lineTo(-2000, -1000);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.end.1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.end.1.worker.js
new file mode 100644
index 0000000000..1ec22bdb6a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.end.1.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.roundrect.end.1
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 100;
+ctx.roundRect(200, 100, 400, 1000, [0]);
+ctx.lineTo(-2000, -1000);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.end.2.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.end.2.html
new file mode 100644
index 0000000000..3913f69d41
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.end.2.html
@@ -0,0 +1,39 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.roundrect.end.2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.roundrect.end.2</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 450;
+ctx.lineCap = 'round';
+ctx.lineJoin = 'bevel';
+ctx.roundRect(150, 150, 2000, 2000, [0]);
+ctx.lineTo(160, 160);
+ctx.stroke();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.end.2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.end.2.worker.js
new file mode 100644
index 0000000000..c3085d53c3
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.end.2.worker.js
@@ -0,0 +1,35 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.roundrect.end.2
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 450;
+ctx.lineCap = 'round';
+ctx.lineJoin = 'bevel';
+ctx.roundRect(150, 150, 2000, 2000, [0]);
+ctx.lineTo(160, 160);
+ctx.stroke();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.end.3.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.end.3.html
new file mode 100644
index 0000000000..349f13485c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.end.3.html
@@ -0,0 +1,37 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.roundrect.end.3</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.roundrect.end.3</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 100;
+ctx.roundRect(101, 51, 2000, 2000, [500, 500, 500, 500]);
+ctx.lineTo(-1, -1);
+ctx.stroke();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.end.3.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.end.3.worker.js
new file mode 100644
index 0000000000..52b9c44283
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.end.3.worker.js
@@ -0,0 +1,33 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.roundrect.end.3
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 100;
+ctx.roundRect(101, 51, 2000, 2000, [500, 500, 500, 500]);
+ctx.lineTo(-1, -1);
+ctx.stroke();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.end.4.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.end.4.html
new file mode 100644
index 0000000000..3c99e3970a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.end.4.html
@@ -0,0 +1,37 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.roundrect.end.4</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.roundrect.end.4</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 10;
+ctx.roundRect(-1, -1, 2000, 2000, [1000, 1000, 1000, 1000]);
+ctx.lineTo(-150, -150);
+ctx.stroke();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.end.4.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.end.4.worker.js
new file mode 100644
index 0000000000..1d57b8978f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.end.4.worker.js
@@ -0,0 +1,33 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.roundrect.end.4
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 10;
+ctx.roundRect(-1, -1, 2000, 2000, [1000, 1000, 1000, 1000]);
+ctx.lineTo(-150, -150);
+ctx.stroke();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 98,1, 0,255,0,255);
+_assertPixel(canvas, 1,48, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.negative.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.negative.html
new file mode 100644
index 0000000000..e3696ca1a5
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.negative.html
@@ -0,0 +1,45 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.roundrect.negative</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.roundrect.negative</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.beginPath();
+ctx.fillStyle = '#0f0';
+ctx.roundRect(0, 0, 50, 25, [10, 0, 0, 0]);
+ctx.roundRect(100, 0, -50, 25, [10, 0, 0, 0]);
+ctx.roundRect(0, 50, 50, -25, [10, 0, 0, 0]);
+ctx.roundRect(100, 50, -50, -25, [10, 0, 0, 0]);
+ctx.fill();
+// All rects drawn
+_assertPixel(canvas, 25,12, 0,255,0,255);
+_assertPixel(canvas, 75,12, 0,255,0,255);
+_assertPixel(canvas, 25,37, 0,255,0,255);
+_assertPixel(canvas, 75,37, 0,255,0,255);
+// Correct corners are rounded.
+_assertPixel(canvas, 1,1, 255,0,0,255);
+_assertPixel(canvas, 98,1, 255,0,0,255);
+_assertPixel(canvas, 1,48, 255,0,0,255);
+_assertPixel(canvas, 98,48, 255,0,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.negative.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.negative.worker.js
new file mode 100644
index 0000000000..c34c20397a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.negative.worker.js
@@ -0,0 +1,41 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.roundrect.negative
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.beginPath();
+ctx.fillStyle = '#0f0';
+ctx.roundRect(0, 0, 50, 25, [10, 0, 0, 0]);
+ctx.roundRect(100, 0, -50, 25, [10, 0, 0, 0]);
+ctx.roundRect(0, 50, 50, -25, [10, 0, 0, 0]);
+ctx.roundRect(100, 50, -50, -25, [10, 0, 0, 0]);
+ctx.fill();
+// All rects drawn
+_assertPixel(canvas, 25,12, 0,255,0,255);
+_assertPixel(canvas, 75,12, 0,255,0,255);
+_assertPixel(canvas, 25,37, 0,255,0,255);
+_assertPixel(canvas, 75,37, 0,255,0,255);
+// Correct corners are rounded.
+_assertPixel(canvas, 1,1, 255,0,0,255);
+_assertPixel(canvas, 98,1, 255,0,0,255);
+_assertPixel(canvas, 1,48, 255,0,0,255);
+_assertPixel(canvas, 98,48, 255,0,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.newsubpath.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.newsubpath.html
new file mode 100644
index 0000000000..6d0a814907
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.newsubpath.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.roundrect.newsubpath</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.roundrect.newsubpath</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.beginPath();
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 50;
+ctx.moveTo(-100, 25);
+ctx.lineTo(-50, 25);
+ctx.roundRect(200, 25, 1, 1, [0]);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.newsubpath.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.newsubpath.worker.js
new file mode 100644
index 0000000000..c6f7934bee
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.newsubpath.worker.js
@@ -0,0 +1,32 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.roundrect.newsubpath
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.beginPath();
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 50;
+ctx.moveTo(-100, 25);
+ctx.lineTo(-50, 25);
+ctx.roundRect(200, 25, 1, 1, [0]);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.nonfinite.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.nonfinite.html
new file mode 100644
index 0000000000..2977350301
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.nonfinite.html
@@ -0,0 +1,116 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.roundrect.nonfinite</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.roundrect.nonfinite</h1>
+<p class="desc">roundRect() with Infinity/NaN is ignored</p>
+
+
+<script>
+var t = async_test("roundRect() with Infinity/NaN is ignored");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50)
+ctx.moveTo(0, 0);
+ctx.lineTo(100, 0);
+ctx.roundRect(Infinity, 50, 1, 1, [0]);
+ctx.roundRect(-Infinity, 50, 1, 1, [0]);
+ctx.roundRect(NaN, 50, 1, 1, [0]);
+ctx.roundRect(0, Infinity, 1, 1, [0]);
+ctx.roundRect(0, -Infinity, 1, 1, [0]);
+ctx.roundRect(0, NaN, 1, 1, [0]);
+ctx.roundRect(0, 50, Infinity, 1, [0]);
+ctx.roundRect(0, 50, -Infinity, 1, [0]);
+ctx.roundRect(0, 50, NaN, 1, [0]);
+ctx.roundRect(0, 50, 1, Infinity, [0]);
+ctx.roundRect(0, 50, 1, -Infinity, [0]);
+ctx.roundRect(0, 50, 1, NaN, [0]);
+ctx.roundRect(0, 50, 1, 1, [Infinity]);
+ctx.roundRect(0, 50, 1, 1, [-Infinity]);
+ctx.roundRect(0, 50, 1, 1, [NaN]);
+ctx.roundRect(0, 50, 1, 1, [Infinity,0]);
+ctx.roundRect(0, 50, 1, 1, [-Infinity,0]);
+ctx.roundRect(0, 50, 1, 1, [NaN,0]);
+ctx.roundRect(0, 50, 1, 1, [0,Infinity]);
+ctx.roundRect(0, 50, 1, 1, [0,-Infinity]);
+ctx.roundRect(0, 50, 1, 1, [0,NaN]);
+ctx.roundRect(0, 50, 1, 1, [Infinity,0,0]);
+ctx.roundRect(0, 50, 1, 1, [-Infinity,0,0]);
+ctx.roundRect(0, 50, 1, 1, [NaN,0,0]);
+ctx.roundRect(0, 50, 1, 1, [0,Infinity,0]);
+ctx.roundRect(0, 50, 1, 1, [0,-Infinity,0]);
+ctx.roundRect(0, 50, 1, 1, [0,NaN,0]);
+ctx.roundRect(0, 50, 1, 1, [0,0,Infinity]);
+ctx.roundRect(0, 50, 1, 1, [0,0,-Infinity]);
+ctx.roundRect(0, 50, 1, 1, [0,0,NaN]);
+ctx.roundRect(0, 50, 1, 1, [Infinity,0,0,0]);
+ctx.roundRect(0, 50, 1, 1, [-Infinity,0,0,0]);
+ctx.roundRect(0, 50, 1, 1, [NaN,0,0,0]);
+ctx.roundRect(0, 50, 1, 1, [0,Infinity,0,0]);
+ctx.roundRect(0, 50, 1, 1, [0,-Infinity,0,0]);
+ctx.roundRect(0, 50, 1, 1, [0,NaN,0,0]);
+ctx.roundRect(0, 50, 1, 1, [0,0,Infinity,0]);
+ctx.roundRect(0, 50, 1, 1, [0,0,-Infinity,0]);
+ctx.roundRect(0, 50, 1, 1, [0,0,NaN,0]);
+ctx.roundRect(0, 50, 1, 1, [0,0,0,Infinity]);
+ctx.roundRect(0, 50, 1, 1, [0,0,0,-Infinity]);
+ctx.roundRect(0, 50, 1, 1, [0,0,0,NaN]);
+ctx.roundRect(Infinity, Infinity, 1, 1, [0]);
+ctx.roundRect(Infinity, Infinity, Infinity, 1, [0]);
+ctx.roundRect(Infinity, Infinity, Infinity, Infinity, [0]);
+ctx.roundRect(Infinity, Infinity, Infinity, Infinity, [Infinity]);
+ctx.roundRect(Infinity, Infinity, Infinity, 1, [Infinity]);
+ctx.roundRect(Infinity, Infinity, 1, Infinity, [0]);
+ctx.roundRect(Infinity, Infinity, 1, Infinity, [Infinity]);
+ctx.roundRect(Infinity, Infinity, 1, 1, [Infinity]);
+ctx.roundRect(Infinity, 50, Infinity, 1, [0]);
+ctx.roundRect(Infinity, 50, Infinity, Infinity, [0]);
+ctx.roundRect(Infinity, 50, Infinity, Infinity, [Infinity]);
+ctx.roundRect(Infinity, 50, Infinity, 1, [Infinity]);
+ctx.roundRect(Infinity, 50, 1, Infinity, [0]);
+ctx.roundRect(Infinity, 50, 1, Infinity, [Infinity]);
+ctx.roundRect(Infinity, 50, 1, 1, [Infinity]);
+ctx.roundRect(0, Infinity, Infinity, 1, [0]);
+ctx.roundRect(0, Infinity, Infinity, Infinity, [0]);
+ctx.roundRect(0, Infinity, Infinity, Infinity, [Infinity]);
+ctx.roundRect(0, Infinity, Infinity, 1, [Infinity]);
+ctx.roundRect(0, Infinity, 1, Infinity, [0]);
+ctx.roundRect(0, Infinity, 1, Infinity, [Infinity]);
+ctx.roundRect(0, Infinity, 1, 1, [Infinity]);
+ctx.roundRect(0, 50, Infinity, Infinity, [0]);
+ctx.roundRect(0, 50, Infinity, Infinity, [Infinity]);
+ctx.roundRect(0, 50, Infinity, 1, [Infinity]);
+ctx.roundRect(0, 50, 1, Infinity, [Infinity]);
+ctx.roundRect(0, 0, 100, 100, [new DOMPoint(10, Infinity)]);
+ctx.roundRect(0, 0, 100, 100, [new DOMPoint(10, -Infinity)]);
+ctx.roundRect(0, 0, 100, 100, [new DOMPoint(10, NaN)]);
+ctx.roundRect(0, 0, 100, 100, [new DOMPoint(Infinity, 10)]);
+ctx.roundRect(0, 0, 100, 100, [new DOMPoint(-Infinity, 10)]);
+ctx.roundRect(0, 0, 100, 100, [new DOMPoint(NaN, 10)]);
+ctx.roundRect(0, 0, 100, 100, [{x: 10, y: Infinity}]);
+ctx.roundRect(0, 0, 100, 100, [{x: 10, y: -Infinity}]);
+ctx.roundRect(0, 0, 100, 100, [{x: 10, y: NaN}]);
+ctx.roundRect(0, 0, 100, 100, [{x: Infinity, y: 10}]);
+ctx.roundRect(0, 0, 100, 100, [{x: -Infinity, y: 10}]);
+ctx.roundRect(0, 0, 100, 100, [{x: NaN, y: 10}]);
+ctx.lineTo(100, 50);
+ctx.lineTo(0, 50);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 90,45, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.nonfinite.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.nonfinite.worker.js
new file mode 100644
index 0000000000..68d0d8a09a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.nonfinite.worker.js
@@ -0,0 +1,112 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.roundrect.nonfinite
+// Description:roundRect() with Infinity/NaN is ignored
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("roundRect() with Infinity/NaN is ignored");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50)
+ctx.moveTo(0, 0);
+ctx.lineTo(100, 0);
+ctx.roundRect(Infinity, 50, 1, 1, [0]);
+ctx.roundRect(-Infinity, 50, 1, 1, [0]);
+ctx.roundRect(NaN, 50, 1, 1, [0]);
+ctx.roundRect(0, Infinity, 1, 1, [0]);
+ctx.roundRect(0, -Infinity, 1, 1, [0]);
+ctx.roundRect(0, NaN, 1, 1, [0]);
+ctx.roundRect(0, 50, Infinity, 1, [0]);
+ctx.roundRect(0, 50, -Infinity, 1, [0]);
+ctx.roundRect(0, 50, NaN, 1, [0]);
+ctx.roundRect(0, 50, 1, Infinity, [0]);
+ctx.roundRect(0, 50, 1, -Infinity, [0]);
+ctx.roundRect(0, 50, 1, NaN, [0]);
+ctx.roundRect(0, 50, 1, 1, [Infinity]);
+ctx.roundRect(0, 50, 1, 1, [-Infinity]);
+ctx.roundRect(0, 50, 1, 1, [NaN]);
+ctx.roundRect(0, 50, 1, 1, [Infinity,0]);
+ctx.roundRect(0, 50, 1, 1, [-Infinity,0]);
+ctx.roundRect(0, 50, 1, 1, [NaN,0]);
+ctx.roundRect(0, 50, 1, 1, [0,Infinity]);
+ctx.roundRect(0, 50, 1, 1, [0,-Infinity]);
+ctx.roundRect(0, 50, 1, 1, [0,NaN]);
+ctx.roundRect(0, 50, 1, 1, [Infinity,0,0]);
+ctx.roundRect(0, 50, 1, 1, [-Infinity,0,0]);
+ctx.roundRect(0, 50, 1, 1, [NaN,0,0]);
+ctx.roundRect(0, 50, 1, 1, [0,Infinity,0]);
+ctx.roundRect(0, 50, 1, 1, [0,-Infinity,0]);
+ctx.roundRect(0, 50, 1, 1, [0,NaN,0]);
+ctx.roundRect(0, 50, 1, 1, [0,0,Infinity]);
+ctx.roundRect(0, 50, 1, 1, [0,0,-Infinity]);
+ctx.roundRect(0, 50, 1, 1, [0,0,NaN]);
+ctx.roundRect(0, 50, 1, 1, [Infinity,0,0,0]);
+ctx.roundRect(0, 50, 1, 1, [-Infinity,0,0,0]);
+ctx.roundRect(0, 50, 1, 1, [NaN,0,0,0]);
+ctx.roundRect(0, 50, 1, 1, [0,Infinity,0,0]);
+ctx.roundRect(0, 50, 1, 1, [0,-Infinity,0,0]);
+ctx.roundRect(0, 50, 1, 1, [0,NaN,0,0]);
+ctx.roundRect(0, 50, 1, 1, [0,0,Infinity,0]);
+ctx.roundRect(0, 50, 1, 1, [0,0,-Infinity,0]);
+ctx.roundRect(0, 50, 1, 1, [0,0,NaN,0]);
+ctx.roundRect(0, 50, 1, 1, [0,0,0,Infinity]);
+ctx.roundRect(0, 50, 1, 1, [0,0,0,-Infinity]);
+ctx.roundRect(0, 50, 1, 1, [0,0,0,NaN]);
+ctx.roundRect(Infinity, Infinity, 1, 1, [0]);
+ctx.roundRect(Infinity, Infinity, Infinity, 1, [0]);
+ctx.roundRect(Infinity, Infinity, Infinity, Infinity, [0]);
+ctx.roundRect(Infinity, Infinity, Infinity, Infinity, [Infinity]);
+ctx.roundRect(Infinity, Infinity, Infinity, 1, [Infinity]);
+ctx.roundRect(Infinity, Infinity, 1, Infinity, [0]);
+ctx.roundRect(Infinity, Infinity, 1, Infinity, [Infinity]);
+ctx.roundRect(Infinity, Infinity, 1, 1, [Infinity]);
+ctx.roundRect(Infinity, 50, Infinity, 1, [0]);
+ctx.roundRect(Infinity, 50, Infinity, Infinity, [0]);
+ctx.roundRect(Infinity, 50, Infinity, Infinity, [Infinity]);
+ctx.roundRect(Infinity, 50, Infinity, 1, [Infinity]);
+ctx.roundRect(Infinity, 50, 1, Infinity, [0]);
+ctx.roundRect(Infinity, 50, 1, Infinity, [Infinity]);
+ctx.roundRect(Infinity, 50, 1, 1, [Infinity]);
+ctx.roundRect(0, Infinity, Infinity, 1, [0]);
+ctx.roundRect(0, Infinity, Infinity, Infinity, [0]);
+ctx.roundRect(0, Infinity, Infinity, Infinity, [Infinity]);
+ctx.roundRect(0, Infinity, Infinity, 1, [Infinity]);
+ctx.roundRect(0, Infinity, 1, Infinity, [0]);
+ctx.roundRect(0, Infinity, 1, Infinity, [Infinity]);
+ctx.roundRect(0, Infinity, 1, 1, [Infinity]);
+ctx.roundRect(0, 50, Infinity, Infinity, [0]);
+ctx.roundRect(0, 50, Infinity, Infinity, [Infinity]);
+ctx.roundRect(0, 50, Infinity, 1, [Infinity]);
+ctx.roundRect(0, 50, 1, Infinity, [Infinity]);
+ctx.roundRect(0, 0, 100, 100, [new DOMPoint(10, Infinity)]);
+ctx.roundRect(0, 0, 100, 100, [new DOMPoint(10, -Infinity)]);
+ctx.roundRect(0, 0, 100, 100, [new DOMPoint(10, NaN)]);
+ctx.roundRect(0, 0, 100, 100, [new DOMPoint(Infinity, 10)]);
+ctx.roundRect(0, 0, 100, 100, [new DOMPoint(-Infinity, 10)]);
+ctx.roundRect(0, 0, 100, 100, [new DOMPoint(NaN, 10)]);
+ctx.roundRect(0, 0, 100, 100, [{x: 10, y: Infinity}]);
+ctx.roundRect(0, 0, 100, 100, [{x: 10, y: -Infinity}]);
+ctx.roundRect(0, 0, 100, 100, [{x: 10, y: NaN}]);
+ctx.roundRect(0, 0, 100, 100, [{x: Infinity, y: 10}]);
+ctx.roundRect(0, 0, 100, 100, [{x: -Infinity, y: 10}]);
+ctx.roundRect(0, 0, 100, 100, [{x: NaN, y: 10}]);
+ctx.lineTo(100, 50);
+ctx.lineTo(0, 50);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 90,45, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.radius.intersecting.1.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.radius.intersecting.1.html
new file mode 100644
index 0000000000..c1916bf78f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.radius.intersecting.1.html
@@ -0,0 +1,40 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.roundrect.radius.intersecting.1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.roundrect.radius.intersecting.1</h1>
+<p class="desc">Check that roundRects with intersecting corner arcs are rendered correctly.</p>
+
+
+<script>
+var t = async_test("Check that roundRects with intersecting corner arcs are rendered correctly.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [40, 40, 40, 40]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+_assertPixel(canvas, 2,25, 0,255,0,255);
+_assertPixel(canvas, 50,1, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 50,48, 0,255,0,255);
+_assertPixel(canvas, 97,25, 0,255,0,255);
+_assertPixel(canvas, 1,1, 255,0,0,255);
+_assertPixel(canvas, 98,1, 255,0,0,255);
+_assertPixel(canvas, 1,48, 255,0,0,255);
+_assertPixel(canvas, 98,48, 255,0,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.radius.intersecting.1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.radius.intersecting.1.worker.js
new file mode 100644
index 0000000000..9da41478d9
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.radius.intersecting.1.worker.js
@@ -0,0 +1,36 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.roundrect.radius.intersecting.1
+// Description:Check that roundRects with intersecting corner arcs are rendered correctly.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Check that roundRects with intersecting corner arcs are rendered correctly.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [40, 40, 40, 40]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+_assertPixel(canvas, 2,25, 0,255,0,255);
+_assertPixel(canvas, 50,1, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 50,48, 0,255,0,255);
+_assertPixel(canvas, 97,25, 0,255,0,255);
+_assertPixel(canvas, 1,1, 255,0,0,255);
+_assertPixel(canvas, 98,1, 255,0,0,255);
+_assertPixel(canvas, 1,48, 255,0,0,255);
+_assertPixel(canvas, 98,48, 255,0,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.radius.intersecting.2.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.radius.intersecting.2.html
new file mode 100644
index 0000000000..f2a69c4ffc
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.radius.intersecting.2.html
@@ -0,0 +1,40 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.roundrect.radius.intersecting.2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.roundrect.radius.intersecting.2</h1>
+<p class="desc">Check that roundRects with intersecting corner arcs are rendered correctly.</p>
+
+
+<script>
+var t = async_test("Check that roundRects with intersecting corner arcs are rendered correctly.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [1000, 1000, 1000, 1000]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+_assertPixel(canvas, 2,25, 0,255,0,255);
+_assertPixel(canvas, 50,1, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 50,48, 0,255,0,255);
+_assertPixel(canvas, 97,25, 0,255,0,255);
+_assertPixel(canvas, 1,1, 255,0,0,255);
+_assertPixel(canvas, 98,1, 255,0,0,255);
+_assertPixel(canvas, 1,48, 255,0,0,255);
+_assertPixel(canvas, 98,48, 255,0,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.radius.intersecting.2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.radius.intersecting.2.worker.js
new file mode 100644
index 0000000000..f0d3f57ca4
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.radius.intersecting.2.worker.js
@@ -0,0 +1,36 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.roundrect.radius.intersecting.2
+// Description:Check that roundRects with intersecting corner arcs are rendered correctly.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Check that roundRects with intersecting corner arcs are rendered correctly.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.roundRect(0, 0, 100, 50, [1000, 1000, 1000, 1000]);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+_assertPixel(canvas, 2,25, 0,255,0,255);
+_assertPixel(canvas, 50,1, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 50,48, 0,255,0,255);
+_assertPixel(canvas, 97,25, 0,255,0,255);
+_assertPixel(canvas, 1,1, 255,0,0,255);
+_assertPixel(canvas, 98,1, 255,0,0,255);
+_assertPixel(canvas, 1,48, 255,0,0,255);
+_assertPixel(canvas, 98,48, 255,0,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.radius.negative.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.radius.negative.html
new file mode 100644
index 0000000000..55e344d374
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.radius.negative.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.roundrect.radius.negative</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.roundrect.radius.negative</h1>
+<p class="desc">roundRect() with negative radius throws an exception</p>
+
+
+<script>
+var t = async_test("roundRect() with negative radius throws an exception");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_js(RangeError, () => { ctx.roundRect(0, 0, 0, 0, [-1])});
+assert_throws_js(RangeError, () => { ctx.roundRect(0, 0, 0, 0, [1, -1])});
+assert_throws_js(RangeError, () => { ctx.roundRect(0, 0, 0, 0, [new DOMPoint(-1, 1), 1])});
+assert_throws_js(RangeError, () => { ctx.roundRect(0, 0, 0, 0, [new DOMPoint(1, -1)])});
+assert_throws_js(RangeError, () => { ctx.roundRect(0, 0, 0, 0, [{x: -1, y: 1}, 1])});
+assert_throws_js(RangeError, () => { ctx.roundRect(0, 0, 0, 0, [{x: 1, y: -1}])});
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.radius.negative.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.radius.negative.worker.js
new file mode 100644
index 0000000000..050e5f7f00
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.radius.negative.worker.js
@@ -0,0 +1,28 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.roundrect.radius.negative
+// Description:roundRect() with negative radius throws an exception
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("roundRect() with negative radius throws an exception");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_js(RangeError, () => { ctx.roundRect(0, 0, 0, 0, [-1])});
+assert_throws_js(RangeError, () => { ctx.roundRect(0, 0, 0, 0, [1, -1])});
+assert_throws_js(RangeError, () => { ctx.roundRect(0, 0, 0, 0, [new DOMPoint(-1, 1), 1])});
+assert_throws_js(RangeError, () => { ctx.roundRect(0, 0, 0, 0, [new DOMPoint(1, -1)])});
+assert_throws_js(RangeError, () => { ctx.roundRect(0, 0, 0, 0, [{x: -1, y: 1}, 1])});
+assert_throws_js(RangeError, () => { ctx.roundRect(0, 0, 0, 0, [{x: 1, y: -1}])});
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.radius.none.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.radius.none.html
new file mode 100644
index 0000000000..530efe46b1
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.radius.none.html
@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.roundrect.radius.none</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.roundrect.radius.none</h1>
+<p class="desc">Check that roundRect throws an RangeError if radii is an empty array.</p>
+
+
+<script>
+var t = async_test("Check that roundRect throws an RangeError if radii is an empty array.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_js(RangeError, () => { ctx.roundRect(0, 0, 100, 50, [])});
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.radius.none.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.radius.none.worker.js
new file mode 100644
index 0000000000..3209e421de
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.radius.none.worker.js
@@ -0,0 +1,23 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.roundrect.radius.none
+// Description:Check that roundRect throws an RangeError if radii is an empty array.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Check that roundRect throws an RangeError if radii is an empty array.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_js(RangeError, () => { ctx.roundRect(0, 0, 100, 50, [])});
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.radius.toomany.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.radius.toomany.html
new file mode 100644
index 0000000000..c667dc690a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.radius.toomany.html
@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.roundrect.radius.toomany</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.roundrect.radius.toomany</h1>
+<p class="desc">Check that roundRect throws an IndeSizeError if radii has more than four items.</p>
+
+
+<script>
+var t = async_test("Check that roundRect throws an IndeSizeError if radii has more than four items.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_js(RangeError, () => { ctx.roundRect(0, 0, 100, 50, [0, 0, 0, 0, 0])});
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.radius.toomany.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.radius.toomany.worker.js
new file mode 100644
index 0000000000..3b05057eda
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.radius.toomany.worker.js
@@ -0,0 +1,23 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.roundrect.radius.toomany
+// Description:Check that roundRect throws an IndeSizeError if radii has more than four items.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Check that roundRect throws an IndeSizeError if radii has more than four items.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_js(RangeError, () => { ctx.roundRect(0, 0, 100, 50, [0, 0, 0, 0, 0])});
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.selfintersect.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.selfintersect.html
new file mode 100644
index 0000000000..0ec2535490
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.selfintersect.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.roundrect.selfintersect</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.roundrect.selfintersect</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.roundRect(0, 0, 100, 50, [0]);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 90;
+ctx.beginPath();
+ctx.roundRect(45, 20, 10, 10, [0]);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.selfintersect.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.selfintersect.worker.js
new file mode 100644
index 0000000000..8b6221414b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.selfintersect.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.roundrect.selfintersect
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.roundRect(0, 0, 100, 50, [0]);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 90;
+ctx.beginPath();
+ctx.roundRect(45, 20, 10, 10, [0]);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.winding.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.winding.html
new file mode 100644
index 0000000000..e7f52fbf29
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.winding.html
@@ -0,0 +1,39 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.roundrect.winding</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.roundrect.winding</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.beginPath();
+ctx.fillStyle = '#f00';
+ctx.roundRect(0, 0, 50, 50, [0]);
+ctx.roundRect(100, 50, -50, -50, [0]);
+ctx.roundRect(0, 25, 100, -25, [0]);
+ctx.roundRect(100, 25, -100, 25, [0]);
+ctx.fill();
+_assertPixel(canvas, 25,12, 0,255,0,255);
+_assertPixel(canvas, 75,12, 0,255,0,255);
+_assertPixel(canvas, 25,37, 0,255,0,255);
+_assertPixel(canvas, 75,37, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.winding.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.winding.worker.js
new file mode 100644
index 0000000000..82e6b5c313
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.winding.worker.js
@@ -0,0 +1,35 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.roundrect.winding
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.beginPath();
+ctx.fillStyle = '#f00';
+ctx.roundRect(0, 0, 50, 50, [0]);
+ctx.roundRect(100, 50, -50, -50, [0]);
+ctx.roundRect(0, 25, 100, -25, [0]);
+ctx.roundRect(100, 25, -100, 25, [0]);
+ctx.fill();
+_assertPixel(canvas, 25,12, 0,255,0,255);
+_assertPixel(canvas, 75,12, 0,255,0,255);
+_assertPixel(canvas, 25,37, 0,255,0,255);
+_assertPixel(canvas, 75,37, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.zero.1.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.zero.1.html
new file mode 100644
index 0000000000..252475194e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.zero.1.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.roundrect.zero.1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.roundrect.zero.1</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 100;
+ctx.beginPath();
+ctx.roundRect(0, 50, 100, 0, [0]);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.zero.1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.zero.1.worker.js
new file mode 100644
index 0000000000..17c9be78ec
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.zero.1.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.roundrect.zero.1
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 100;
+ctx.beginPath();
+ctx.roundRect(0, 50, 100, 0, [0]);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.zero.2.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.zero.2.html
new file mode 100644
index 0000000000..2463e88f1e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.zero.2.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.roundrect.zero.2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.roundrect.zero.2</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 100;
+ctx.beginPath();
+ctx.roundRect(50, -100, 0, 250, [0]);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.zero.2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.zero.2.worker.js
new file mode 100644
index 0000000000..9ae058a847
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.zero.2.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.roundrect.zero.2
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 100;
+ctx.beginPath();
+ctx.roundRect(50, -100, 0, 250, [0]);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.zero.3.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.zero.3.html
new file mode 100644
index 0000000000..39de433b08
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.zero.3.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.roundrect.zero.3</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.roundrect.zero.3</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 100;
+ctx.beginPath();
+ctx.roundRect(50, 25, 0, 0, [0]);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.zero.3.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.zero.3.worker.js
new file mode 100644
index 0000000000..98d37e08e5
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.zero.3.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.roundrect.zero.3
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 100;
+ctx.beginPath();
+ctx.roundRect(50, 25, 0, 0, [0]);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.zero.4.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.zero.4.html
new file mode 100644
index 0000000000..3c6c734b19
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.zero.4.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.roundrect.zero.4</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.roundrect.zero.4</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 50;
+ctx.roundRect(100, 25, 0, 0, [0]);
+ctx.lineTo(0, 25);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.zero.4.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.zero.4.worker.js
new file mode 100644
index 0000000000..462cde2a03
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.zero.4.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.roundrect.zero.4
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 50;
+ctx.roundRect(100, 25, 0, 0, [0]);
+ctx.lineTo(0, 25);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.zero.5.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.zero.5.html
new file mode 100644
index 0000000000..de66603a66
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.zero.5.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.roundrect.zero.5</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.roundrect.zero.5</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 50;
+ctx.moveTo(0, 0);
+ctx.roundRect(100, 25, 0, 0, [0]);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.zero.5.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.zero.5.worker.js
new file mode 100644
index 0000000000..0f706ce246
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.zero.5.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.roundrect.zero.5
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 50;
+ctx.moveTo(0, 0);
+ctx.roundRect(100, 25, 0, 0, [0]);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.zero.6.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.zero.6.html
new file mode 100644
index 0000000000..bd7ef0fa94
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.zero.6.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.roundrect.zero.6</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.roundrect.zero.6</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#f00';
+ctx.lineJoin = 'miter';
+ctx.miterLimit = 1.5;
+ctx.lineWidth = 200;
+ctx.beginPath();
+ctx.roundRect(100, 25, 1000, 0, [0]);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.zero.6.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.zero.6.worker.js
new file mode 100644
index 0000000000..f2115cdd46
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.roundrect.zero.6.worker.js
@@ -0,0 +1,32 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.roundrect.zero.6
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#f00';
+ctx.lineJoin = 'miter';
+ctx.miterLimit = 1.5;
+ctx.lineWidth = 200;
+ctx.beginPath();
+ctx.roundRect(100, 25, 1000, 0, [0]);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.empty.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.empty.html
new file mode 100644
index 0000000000..a873b260da
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.empty.html
@@ -0,0 +1,37 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.stroke.empty</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.stroke.empty</h1>
+<p class="desc">Empty subpaths are not stroked</p>
+
+
+<script>
+var t = async_test("Empty subpaths are not stroked");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 100;
+ctx.lineCap = 'round';
+ctx.lineJoin = 'round';
+ctx.beginPath();
+ctx.moveTo(40, 25);
+ctx.moveTo(60, 25);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.empty.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.empty.worker.js
new file mode 100644
index 0000000000..1852c91876
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.empty.worker.js
@@ -0,0 +1,33 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.stroke.empty
+// Description:Empty subpaths are not stroked
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Empty subpaths are not stroked");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 100;
+ctx.lineCap = 'round';
+ctx.lineJoin = 'round';
+ctx.beginPath();
+ctx.moveTo(40, 25);
+ctx.moveTo(60, 25);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.overlap.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.overlap.html
new file mode 100644
index 0000000000..252a840ed7
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.overlap.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.stroke.overlap</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.stroke.overlap</h1>
+<p class="desc">Stroked subpaths are combined before being drawn</p>
+
+
+<script>
+var t = async_test("Stroked subpaths are combined before being drawn");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#000';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = 'rgba(0, 255, 0, 0.5)';
+ctx.lineWidth = 50;
+ctx.moveTo(0, 20);
+ctx.lineTo(100, 20);
+ctx.moveTo(0, 30);
+ctx.lineTo(100, 30);
+ctx.stroke();
+_assertPixelApprox(canvas, 50,25, 0,127,0,255, 1);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.overlap.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.overlap.worker.js
new file mode 100644
index 0000000000..aa7cc51d77
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.overlap.worker.js
@@ -0,0 +1,32 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.stroke.overlap
+// Description:Stroked subpaths are combined before being drawn
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Stroked subpaths are combined before being drawn");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#000';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = 'rgba(0, 255, 0, 0.5)';
+ctx.lineWidth = 50;
+ctx.moveTo(0, 20);
+ctx.lineTo(100, 20);
+ctx.moveTo(0, 30);
+ctx.lineTo(100, 30);
+ctx.stroke();
+_assertPixelApprox(canvas, 50,25, 0,127,0,255, 1);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.prune.arc.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.prune.arc.html
new file mode 100644
index 0000000000..67f25440dc
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.prune.arc.html
@@ -0,0 +1,41 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.stroke.prune.arc</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.stroke.prune.arc</h1>
+<p class="desc">Zero-length line segments from arcTo and arc are removed before stroking</p>
+
+
+<script>
+var t = async_test("Zero-length line segments from arcTo and arc are removed before stroking");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 100;
+ctx.lineCap = 'round';
+ctx.lineJoin = 'round';
+ctx.beginPath();
+ctx.moveTo(50, 25);
+ctx.arcTo(50, 25, 150, 25, 10);
+ctx.stroke();
+ctx.beginPath();
+ctx.moveTo(60, 25);
+ctx.arc(50, 25, 10, 0, 0, false);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.prune.arc.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.prune.arc.worker.js
new file mode 100644
index 0000000000..ca5844ce2a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.prune.arc.worker.js
@@ -0,0 +1,37 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.stroke.prune.arc
+// Description:Zero-length line segments from arcTo and arc are removed before stroking
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Zero-length line segments from arcTo and arc are removed before stroking");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 100;
+ctx.lineCap = 'round';
+ctx.lineJoin = 'round';
+ctx.beginPath();
+ctx.moveTo(50, 25);
+ctx.arcTo(50, 25, 150, 25, 10);
+ctx.stroke();
+ctx.beginPath();
+ctx.moveTo(60, 25);
+ctx.arc(50, 25, 10, 0, 0, false);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.prune.closed.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.prune.closed.html
new file mode 100644
index 0000000000..1012975fcf
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.prune.closed.html
@@ -0,0 +1,38 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.stroke.prune.closed</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.stroke.prune.closed</h1>
+<p class="desc">Zero-length line segments from closed paths are removed before stroking</p>
+
+
+<script>
+var t = async_test("Zero-length line segments from closed paths are removed before stroking");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 100;
+ctx.lineCap = 'round';
+ctx.lineJoin = 'round';
+ctx.beginPath();
+ctx.moveTo(50, 25);
+ctx.lineTo(50, 25);
+ctx.closePath();
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.prune.closed.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.prune.closed.worker.js
new file mode 100644
index 0000000000..9b3426f6d0
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.prune.closed.worker.js
@@ -0,0 +1,34 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.stroke.prune.closed
+// Description:Zero-length line segments from closed paths are removed before stroking
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Zero-length line segments from closed paths are removed before stroking");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 100;
+ctx.lineCap = 'round';
+ctx.lineJoin = 'round';
+ctx.beginPath();
+ctx.moveTo(50, 25);
+ctx.lineTo(50, 25);
+ctx.closePath();
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.prune.corner.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.prune.corner.html
new file mode 100644
index 0000000000..553fdb6165
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.prune.corner.html
@@ -0,0 +1,40 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.stroke.prune.corner</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.stroke.prune.corner</h1>
+<p class="desc">Zero-length line segments are removed before stroking with miters</p>
+
+
+<script>
+var t = async_test("Zero-length line segments are removed before stroking with miters");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 400;
+ctx.lineJoin = 'miter';
+ctx.miterLimit = 1.4;
+ctx.beginPath();
+ctx.moveTo(-1000, 200);
+ctx.lineTo(-100, 200);
+ctx.lineTo(-100, 200);
+ctx.lineTo(-100, 200);
+ctx.lineTo(-100, 1000);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.prune.corner.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.prune.corner.worker.js
new file mode 100644
index 0000000000..c2233bbc15
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.prune.corner.worker.js
@@ -0,0 +1,36 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.stroke.prune.corner
+// Description:Zero-length line segments are removed before stroking with miters
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Zero-length line segments are removed before stroking with miters");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 400;
+ctx.lineJoin = 'miter';
+ctx.miterLimit = 1.4;
+ctx.beginPath();
+ctx.moveTo(-1000, 200);
+ctx.lineTo(-100, 200);
+ctx.lineTo(-100, 200);
+ctx.lineTo(-100, 200);
+ctx.lineTo(-100, 1000);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.prune.curve.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.prune.curve.html
new file mode 100644
index 0000000000..ae2f922a41
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.prune.curve.html
@@ -0,0 +1,41 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.stroke.prune.curve</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.stroke.prune.curve</h1>
+<p class="desc">Zero-length line segments from quadraticCurveTo and bezierCurveTo are removed before stroking</p>
+
+
+<script>
+var t = async_test("Zero-length line segments from quadraticCurveTo and bezierCurveTo are removed before stroking");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 100;
+ctx.lineCap = 'round';
+ctx.lineJoin = 'round';
+ctx.beginPath();
+ctx.moveTo(50, 25);
+ctx.quadraticCurveTo(50, 25, 50, 25);
+ctx.stroke();
+ctx.beginPath();
+ctx.moveTo(50, 25);
+ctx.bezierCurveTo(50, 25, 50, 25, 50, 25);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.prune.curve.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.prune.curve.worker.js
new file mode 100644
index 0000000000..7dc88a7213
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.prune.curve.worker.js
@@ -0,0 +1,37 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.stroke.prune.curve
+// Description:Zero-length line segments from quadraticCurveTo and bezierCurveTo are removed before stroking
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Zero-length line segments from quadraticCurveTo and bezierCurveTo are removed before stroking");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 100;
+ctx.lineCap = 'round';
+ctx.lineJoin = 'round';
+ctx.beginPath();
+ctx.moveTo(50, 25);
+ctx.quadraticCurveTo(50, 25, 50, 25);
+ctx.stroke();
+ctx.beginPath();
+ctx.moveTo(50, 25);
+ctx.bezierCurveTo(50, 25, 50, 25, 50, 25);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.prune.line.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.prune.line.html
new file mode 100644
index 0000000000..e9163cab40
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.prune.line.html
@@ -0,0 +1,37 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.stroke.prune.line</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.stroke.prune.line</h1>
+<p class="desc">Zero-length line segments from lineTo are removed before stroking</p>
+
+
+<script>
+var t = async_test("Zero-length line segments from lineTo are removed before stroking");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 100;
+ctx.lineCap = 'round';
+ctx.lineJoin = 'round';
+ctx.beginPath();
+ctx.moveTo(50, 25);
+ctx.lineTo(50, 25);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.prune.line.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.prune.line.worker.js
new file mode 100644
index 0000000000..160bbe7eea
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.prune.line.worker.js
@@ -0,0 +1,33 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.stroke.prune.line
+// Description:Zero-length line segments from lineTo are removed before stroking
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Zero-length line segments from lineTo are removed before stroking");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 100;
+ctx.lineCap = 'round';
+ctx.lineJoin = 'round';
+ctx.beginPath();
+ctx.moveTo(50, 25);
+ctx.lineTo(50, 25);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.prune.rect.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.prune.rect.html
new file mode 100644
index 0000000000..72d0d6b6e9
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.prune.rect.html
@@ -0,0 +1,37 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.stroke.prune.rect</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.stroke.prune.rect</h1>
+<p class="desc">Zero-length line segments from rect and strokeRect are removed before stroking</p>
+
+
+<script>
+var t = async_test("Zero-length line segments from rect and strokeRect are removed before stroking");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 100;
+ctx.lineCap = 'round';
+ctx.lineJoin = 'round';
+ctx.beginPath();
+ctx.rect(50, 25, 0, 0);
+ctx.stroke();
+ctx.strokeRect(50, 25, 0, 0);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.prune.rect.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.prune.rect.worker.js
new file mode 100644
index 0000000000..c6ed67ed9e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.prune.rect.worker.js
@@ -0,0 +1,33 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.stroke.prune.rect
+// Description:Zero-length line segments from rect and strokeRect are removed before stroking
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Zero-length line segments from rect and strokeRect are removed before stroking");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 100;
+ctx.lineCap = 'round';
+ctx.lineJoin = 'round';
+ctx.beginPath();
+ctx.rect(50, 25, 0, 0);
+ctx.stroke();
+ctx.strokeRect(50, 25, 0, 0);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.scale1.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.scale1.html
new file mode 100644
index 0000000000..e13fd9fe55
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.scale1.html
@@ -0,0 +1,51 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.stroke.scale1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.stroke.scale1</h1>
+<p class="desc">Stroke line widths are scaled by the current transformation matrix</p>
+
+
+<script>
+var t = async_test("Stroke line widths are scaled by the current transformation matrix");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.beginPath();
+ctx.rect(25, 12.5, 50, 25);
+ctx.save();
+ctx.scale(50, 25);
+ctx.strokeStyle = '#0f0';
+ctx.stroke();
+ctx.restore();
+ctx.beginPath();
+ctx.rect(-25, -12.5, 150, 75);
+ctx.save();
+ctx.scale(50, 25);
+ctx.strokeStyle = '#f00';
+ctx.stroke();
+ctx.restore();
+_assertPixel(canvas, 0,0, 0,255,0,255);
+_assertPixel(canvas, 50,0, 0,255,0,255);
+_assertPixel(canvas, 99,0, 0,255,0,255);
+_assertPixel(canvas, 0,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 99,25, 0,255,0,255);
+_assertPixel(canvas, 0,49, 0,255,0,255);
+_assertPixel(canvas, 50,49, 0,255,0,255);
+_assertPixel(canvas, 99,49, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.scale1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.scale1.worker.js
new file mode 100644
index 0000000000..ef7b2d4d04
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.scale1.worker.js
@@ -0,0 +1,47 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.stroke.scale1
+// Description:Stroke line widths are scaled by the current transformation matrix
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Stroke line widths are scaled by the current transformation matrix");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.beginPath();
+ctx.rect(25, 12.5, 50, 25);
+ctx.save();
+ctx.scale(50, 25);
+ctx.strokeStyle = '#0f0';
+ctx.stroke();
+ctx.restore();
+ctx.beginPath();
+ctx.rect(-25, -12.5, 150, 75);
+ctx.save();
+ctx.scale(50, 25);
+ctx.strokeStyle = '#f00';
+ctx.stroke();
+ctx.restore();
+_assertPixel(canvas, 0,0, 0,255,0,255);
+_assertPixel(canvas, 50,0, 0,255,0,255);
+_assertPixel(canvas, 99,0, 0,255,0,255);
+_assertPixel(canvas, 0,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 99,25, 0,255,0,255);
+_assertPixel(canvas, 0,49, 0,255,0,255);
+_assertPixel(canvas, 50,49, 0,255,0,255);
+_assertPixel(canvas, 99,49, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.scale2.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.scale2.html
new file mode 100644
index 0000000000..2b80f16898
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.scale2.html
@@ -0,0 +1,53 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.stroke.scale2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.stroke.scale2</h1>
+<p class="desc">Stroke line widths are scaled by the current transformation matrix</p>
+
+
+<script>
+var t = async_test("Stroke line widths are scaled by the current transformation matrix");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.beginPath();
+ctx.rect(25, 12.5, 50, 25);
+ctx.save();
+ctx.rotate(Math.PI/2);
+ctx.scale(25, 50);
+ctx.strokeStyle = '#0f0';
+ctx.stroke();
+ctx.restore();
+ctx.beginPath();
+ctx.rect(-25, -12.5, 150, 75);
+ctx.save();
+ctx.rotate(Math.PI/2);
+ctx.scale(25, 50);
+ctx.strokeStyle = '#f00';
+ctx.stroke();
+ctx.restore();
+_assertPixel(canvas, 0,0, 0,255,0,255);
+_assertPixel(canvas, 50,0, 0,255,0,255);
+_assertPixel(canvas, 99,0, 0,255,0,255);
+_assertPixel(canvas, 0,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 99,25, 0,255,0,255);
+_assertPixel(canvas, 0,49, 0,255,0,255);
+_assertPixel(canvas, 50,49, 0,255,0,255);
+_assertPixel(canvas, 99,49, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.scale2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.scale2.worker.js
new file mode 100644
index 0000000000..9c6d4fbf54
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.scale2.worker.js
@@ -0,0 +1,49 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.stroke.scale2
+// Description:Stroke line widths are scaled by the current transformation matrix
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Stroke line widths are scaled by the current transformation matrix");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.beginPath();
+ctx.rect(25, 12.5, 50, 25);
+ctx.save();
+ctx.rotate(Math.PI/2);
+ctx.scale(25, 50);
+ctx.strokeStyle = '#0f0';
+ctx.stroke();
+ctx.restore();
+ctx.beginPath();
+ctx.rect(-25, -12.5, 150, 75);
+ctx.save();
+ctx.rotate(Math.PI/2);
+ctx.scale(25, 50);
+ctx.strokeStyle = '#f00';
+ctx.stroke();
+ctx.restore();
+_assertPixel(canvas, 0,0, 0,255,0,255);
+_assertPixel(canvas, 50,0, 0,255,0,255);
+_assertPixel(canvas, 99,0, 0,255,0,255);
+_assertPixel(canvas, 0,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 99,25, 0,255,0,255);
+_assertPixel(canvas, 0,49, 0,255,0,255);
+_assertPixel(canvas, 50,49, 0,255,0,255);
+_assertPixel(canvas, 99,49, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.skew.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.skew.html
new file mode 100644
index 0000000000..55e96e08e0
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.skew.html
@@ -0,0 +1,66 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.stroke.skew</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.stroke.skew</h1>
+<p class="desc">Strokes lines are skewed by the current transformation matrix</p>
+
+
+<script>
+var t = async_test("Strokes lines are skewed by the current transformation matrix");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.save();
+ctx.beginPath();
+ctx.moveTo(49, -50);
+ctx.lineTo(201, -50);
+ctx.rotate(Math.PI/4);
+ctx.scale(1, 283);
+ctx.strokeStyle = '#0f0';
+ctx.stroke();
+ctx.restore();
+ctx.save();
+ctx.beginPath();
+ctx.translate(-150, 0);
+ctx.moveTo(49, -50);
+ctx.lineTo(199, -50);
+ctx.rotate(Math.PI/4);
+ctx.scale(1, 142);
+ctx.strokeStyle = '#f00';
+ctx.stroke();
+ctx.restore();
+ctx.save();
+ctx.beginPath();
+ctx.translate(-150, 0);
+ctx.moveTo(49, -50);
+ctx.lineTo(199, -50);
+ctx.rotate(Math.PI/4);
+ctx.scale(1, 142);
+ctx.strokeStyle = '#f00';
+ctx.stroke();
+ctx.restore();
+_assertPixel(canvas, 0,0, 0,255,0,255);
+_assertPixel(canvas, 50,0, 0,255,0,255);
+_assertPixel(canvas, 99,0, 0,255,0,255);
+_assertPixel(canvas, 0,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 99,25, 0,255,0,255);
+_assertPixel(canvas, 0,49, 0,255,0,255);
+_assertPixel(canvas, 50,49, 0,255,0,255);
+_assertPixel(canvas, 99,49, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.skew.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.skew.worker.js
new file mode 100644
index 0000000000..745afe4ff5
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.skew.worker.js
@@ -0,0 +1,62 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.stroke.skew
+// Description:Strokes lines are skewed by the current transformation matrix
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Strokes lines are skewed by the current transformation matrix");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.save();
+ctx.beginPath();
+ctx.moveTo(49, -50);
+ctx.lineTo(201, -50);
+ctx.rotate(Math.PI/4);
+ctx.scale(1, 283);
+ctx.strokeStyle = '#0f0';
+ctx.stroke();
+ctx.restore();
+ctx.save();
+ctx.beginPath();
+ctx.translate(-150, 0);
+ctx.moveTo(49, -50);
+ctx.lineTo(199, -50);
+ctx.rotate(Math.PI/4);
+ctx.scale(1, 142);
+ctx.strokeStyle = '#f00';
+ctx.stroke();
+ctx.restore();
+ctx.save();
+ctx.beginPath();
+ctx.translate(-150, 0);
+ctx.moveTo(49, -50);
+ctx.lineTo(199, -50);
+ctx.rotate(Math.PI/4);
+ctx.scale(1, 142);
+ctx.strokeStyle = '#f00';
+ctx.stroke();
+ctx.restore();
+_assertPixel(canvas, 0,0, 0,255,0,255);
+_assertPixel(canvas, 50,0, 0,255,0,255);
+_assertPixel(canvas, 99,0, 0,255,0,255);
+_assertPixel(canvas, 0,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 99,25, 0,255,0,255);
+_assertPixel(canvas, 0,49, 0,255,0,255);
+_assertPixel(canvas, 50,49, 0,255,0,255);
+_assertPixel(canvas, 99,49, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.unaffected.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.unaffected.html
new file mode 100644
index 0000000000..58e7f75dc8
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.unaffected.html
@@ -0,0 +1,39 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.stroke.unaffected</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.stroke.unaffected</h1>
+<p class="desc">Stroking does not start a new path or subpath</p>
+
+
+<script>
+var t = async_test("Stroking does not start a new path or subpath");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 50;
+ctx.moveTo(-100, 25);
+ctx.lineTo(-100, -100);
+ctx.lineTo(200, -100);
+ctx.lineTo(200, 25);
+ctx.strokeStyle = '#f00';
+ctx.stroke();
+ctx.closePath();
+ctx.strokeStyle = '#0f0';
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.unaffected.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.unaffected.worker.js
new file mode 100644
index 0000000000..a47c32d009
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.unaffected.worker.js
@@ -0,0 +1,35 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.stroke.unaffected
+// Description:Stroking does not start a new path or subpath
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Stroking does not start a new path or subpath");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.lineWidth = 50;
+ctx.moveTo(-100, 25);
+ctx.lineTo(-100, -100);
+ctx.lineTo(200, -100);
+ctx.lineTo(200, 25);
+ctx.strokeStyle = '#f00';
+ctx.stroke();
+ctx.closePath();
+ctx.strokeStyle = '#0f0';
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.union.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.union.html
new file mode 100644
index 0000000000..c3f063fe52
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.union.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.stroke.union</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.stroke.union</h1>
+<p class="desc">Strokes in opposite directions are unioned, not subtracted</p>
+
+
+<script>
+var t = async_test("Strokes in opposite directions are unioned, not subtracted");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 40;
+ctx.moveTo(0, 10);
+ctx.lineTo(100, 10);
+ctx.moveTo(100, 40);
+ctx.lineTo(0, 40);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.union.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.union.worker.js
new file mode 100644
index 0000000000..282cb10bf7
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.stroke.union.worker.js
@@ -0,0 +1,32 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.stroke.union
+// Description:Strokes in opposite directions are unioned, not subtracted
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Strokes in opposite directions are unioned, not subtracted");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 40;
+ctx.moveTo(0, 10);
+ctx.lineTo(100, 10);
+ctx.moveTo(100, 40);
+ctx.lineTo(0, 40);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.transformation.basic.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.transformation.basic.html
new file mode 100644
index 0000000000..1837004138
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.transformation.basic.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.transformation.basic</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.transformation.basic</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.translate(-100, 0);
+ctx.rect(100, 0, 100, 50);
+ctx.translate(0, -100);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.transformation.basic.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.transformation.basic.worker.js
new file mode 100644
index 0000000000..7bc112dd1d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.transformation.basic.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.transformation.basic
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.translate(-100, 0);
+ctx.rect(100, 0, 100, 50);
+ctx.translate(0, -100);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.transformation.changing.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.transformation.changing.html
new file mode 100644
index 0000000000..b8a467387d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.transformation.changing.html
@@ -0,0 +1,41 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.transformation.changing</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.transformation.changing</h1>
+<p class="desc">Transformations are applied while building paths, not when drawing</p>
+
+
+<script>
+var t = async_test("Transformations are applied while building paths, not when drawing");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.moveTo(0, 0);
+ctx.translate(100, 0);
+ctx.lineTo(0, 0);
+ctx.translate(0, 50);
+ctx.lineTo(0, 0);
+ctx.translate(-100, 0);
+ctx.lineTo(0, 0);
+ctx.translate(1000, 1000);
+ctx.rotate(Math.PI/2);
+ctx.scale(0.1, 0.1);
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.transformation.changing.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.transformation.changing.worker.js
new file mode 100644
index 0000000000..2460d24b19
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.transformation.changing.worker.js
@@ -0,0 +1,37 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.transformation.changing
+// Description:Transformations are applied while building paths, not when drawing
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Transformations are applied while building paths, not when drawing");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.moveTo(0, 0);
+ctx.translate(100, 0);
+ctx.lineTo(0, 0);
+ctx.translate(0, 50);
+ctx.lineTo(0, 0);
+ctx.translate(-100, 0);
+ctx.lineTo(0, 0);
+ctx.translate(1000, 1000);
+ctx.rotate(Math.PI/2);
+ctx.scale(0.1, 0.1);
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.transformation.multiple.html b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.transformation.multiple.html
new file mode 100644
index 0000000000..fcc2942435
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.transformation.multiple.html
@@ -0,0 +1,44 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.path.transformation.multiple</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.path.transformation.multiple</h1>
+<p class="desc">Transformations are applied while building paths, not when drawing</p>
+
+
+<script>
+var t = async_test("Transformations are applied while building paths, not when drawing");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.translate(-100, 0);
+ctx.rect(0, 0, 100, 50);
+ctx.fill();
+ctx.translate(100, 0);
+ctx.fill();
+ctx.beginPath();
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 50;
+ctx.translate(0, -50);
+ctx.moveTo(0, 25);
+ctx.lineTo(100, 25);
+ctx.stroke();
+ctx.translate(0, 50);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.transformation.multiple.worker.js b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.transformation.multiple.worker.js
new file mode 100644
index 0000000000..a2a04ca777
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/path-objects/2d.path.transformation.multiple.worker.js
@@ -0,0 +1,40 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.path.transformation.multiple
+// Description:Transformations are applied while building paths, not when drawing
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Transformations are applied while building paths, not when drawing");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.translate(-100, 0);
+ctx.rect(0, 0, 100, 50);
+ctx.fill();
+ctx.translate(100, 0);
+ctx.fill();
+ctx.beginPath();
+ctx.strokeStyle = '#f00';
+ctx.lineWidth = 50;
+ctx.translate(0, -50);
+ctx.moveTo(0, 25);
+ctx.lineTo(100, 25);
+ctx.stroke();
+ctx.translate(0, 50);
+ctx.stroke();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create1.basic.html b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create1.basic.html
new file mode 100644
index 0000000000..24d9a77405
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create1.basic.html
@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.imageData.create1.basic</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.imageData.create1.basic</h1>
+<p class="desc">createImageData(imgdata) exists and returns something</p>
+
+
+<script>
+var t = async_test("createImageData(imgdata) exists and returns something");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertDifferent(ctx.createImageData(ctx.createImageData(1, 1)), null, "ctx.createImageData(ctx.createImageData(1, 1))", "null");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create1.basic.worker.js b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create1.basic.worker.js
new file mode 100644
index 0000000000..54d2cadb1c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create1.basic.worker.js
@@ -0,0 +1,23 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.imageData.create1.basic
+// Description:createImageData(imgdata) exists and returns something
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("createImageData(imgdata) exists and returns something");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertDifferent(ctx.createImageData(ctx.createImageData(1, 1)), null, "ctx.createImageData(ctx.createImageData(1, 1))", "null");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create1.initial.html b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create1.initial.html
new file mode 100644
index 0000000000..658ae83b56
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create1.initial.html
@@ -0,0 +1,38 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.imageData.create1.initial</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.imageData.create1.initial</h1>
+<p class="desc">createImageData(imgdata) returns transparent black data of the right size</p>
+
+
+<script>
+var t = async_test("createImageData(imgdata) returns transparent black data of the right size");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+var imgdata1 = ctx.getImageData(0, 0, 10, 20);
+var imgdata2 = ctx.createImageData(imgdata1);
+_assertSame(imgdata2.data.length, imgdata1.data.length, "imgdata2.data.length", "imgdata1.data.length");
+_assertSame(imgdata2.width, imgdata1.width, "imgdata2.width", "imgdata1.width");
+_assertSame(imgdata2.height, imgdata1.height, "imgdata2.height", "imgdata1.height");
+var isTransparentBlack = true;
+for (var i = 0; i < imgdata2.data.length; ++i)
+ if (imgdata2.data[i] !== 0)
+ isTransparentBlack = false;
+_assert(isTransparentBlack, "isTransparentBlack");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create1.initial.worker.js b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create1.initial.worker.js
new file mode 100644
index 0000000000..bfff76b29f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create1.initial.worker.js
@@ -0,0 +1,34 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.imageData.create1.initial
+// Description:createImageData(imgdata) returns transparent black data of the right size
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("createImageData(imgdata) returns transparent black data of the right size");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+var imgdata1 = ctx.getImageData(0, 0, 10, 20);
+var imgdata2 = ctx.createImageData(imgdata1);
+_assertSame(imgdata2.data.length, imgdata1.data.length, "imgdata2.data.length", "imgdata1.data.length");
+_assertSame(imgdata2.width, imgdata1.width, "imgdata2.width", "imgdata1.width");
+_assertSame(imgdata2.height, imgdata1.height, "imgdata2.height", "imgdata1.height");
+var isTransparentBlack = true;
+for (var i = 0; i < imgdata2.data.length; ++i)
+ if (imgdata2.data[i] !== 0)
+ isTransparentBlack = false;
+_assert(isTransparentBlack, "isTransparentBlack");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create1.zero.html b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create1.zero.html
new file mode 100644
index 0000000000..736725f0fd
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create1.zero.html
@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.imageData.create1.zero</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.imageData.create1.zero</h1>
+<p class="desc">createImageData(null) throws TypeError</p>
+
+
+<script>
+var t = async_test("createImageData(null) throws TypeError");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_js(TypeError, function() { ctx.createImageData(null); });
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create1.zero.worker.js b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create1.zero.worker.js
new file mode 100644
index 0000000000..c51067ed62
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create1.zero.worker.js
@@ -0,0 +1,23 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.imageData.create1.zero
+// Description:createImageData(null) throws TypeError
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("createImageData(null) throws TypeError");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_js(TypeError, function() { ctx.createImageData(null); });
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create2.basic.html b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create2.basic.html
new file mode 100644
index 0000000000..7dca77e4ae
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create2.basic.html
@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.imageData.create2.basic</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.imageData.create2.basic</h1>
+<p class="desc">createImageData(sw, sh) exists and returns something</p>
+
+
+<script>
+var t = async_test("createImageData(sw, sh) exists and returns something");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertDifferent(ctx.createImageData(1, 1), null, "ctx.createImageData(1, 1)", "null");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create2.basic.worker.js b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create2.basic.worker.js
new file mode 100644
index 0000000000..e99cbe276b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create2.basic.worker.js
@@ -0,0 +1,23 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.imageData.create2.basic
+// Description:createImageData(sw, sh) exists and returns something
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("createImageData(sw, sh) exists and returns something");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertDifferent(ctx.createImageData(1, 1), null, "ctx.createImageData(1, 1)", "null");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create2.initial.html b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create2.initial.html
new file mode 100644
index 0000000000..76017f5c4f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create2.initial.html
@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.imageData.create2.initial</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.imageData.create2.initial</h1>
+<p class="desc">createImageData(sw, sh) returns transparent black data of the right size</p>
+
+
+<script>
+var t = async_test("createImageData(sw, sh) returns transparent black data of the right size");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var imgdata = ctx.createImageData(10, 20);
+_assertSame(imgdata.data.length, imgdata.width*imgdata.height*4, "imgdata.data.length", "imgdata.width*imgdata.height*4");
+_assert(imgdata.width < imgdata.height, "imgdata.width < imgdata.height");
+_assert(imgdata.width > 0, "imgdata.width > 0");
+var isTransparentBlack = true;
+for (var i = 0; i < imgdata.data.length; ++i)
+ if (imgdata.data[i] !== 0)
+ isTransparentBlack = false;
+_assert(isTransparentBlack, "isTransparentBlack");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create2.initial.worker.js b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create2.initial.worker.js
new file mode 100644
index 0000000000..0e681dee07
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create2.initial.worker.js
@@ -0,0 +1,31 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.imageData.create2.initial
+// Description:createImageData(sw, sh) returns transparent black data of the right size
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("createImageData(sw, sh) returns transparent black data of the right size");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var imgdata = ctx.createImageData(10, 20);
+_assertSame(imgdata.data.length, imgdata.width*imgdata.height*4, "imgdata.data.length", "imgdata.width*imgdata.height*4");
+_assert(imgdata.width < imgdata.height, "imgdata.width < imgdata.height");
+_assert(imgdata.width > 0, "imgdata.width > 0");
+var isTransparentBlack = true;
+for (var i = 0; i < imgdata.data.length; ++i)
+ if (imgdata.data[i] !== 0)
+ isTransparentBlack = false;
+_assert(isTransparentBlack, "isTransparentBlack");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create2.large.html b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create2.large.html
new file mode 100644
index 0000000000..f3d19d3f29
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create2.large.html
@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.imageData.create2.large</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.imageData.create2.large</h1>
+<p class="desc">createImageData(sw, sh) works for sizes much larger than the canvas</p>
+
+
+<script>
+var t = async_test("createImageData(sw, sh) works for sizes much larger than the canvas");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var imgdata = ctx.createImageData(1000, 2000);
+_assertSame(imgdata.data.length, imgdata.width*imgdata.height*4, "imgdata.data.length", "imgdata.width*imgdata.height*4");
+_assert(imgdata.width < imgdata.height, "imgdata.width < imgdata.height");
+_assert(imgdata.width > 0, "imgdata.width > 0");
+var isTransparentBlack = true;
+for (var i = 0; i < imgdata.data.length; i += 7813) // check ~1024 points (assuming normal scaling)
+ if (imgdata.data[i] !== 0)
+ isTransparentBlack = false;
+_assert(isTransparentBlack, "isTransparentBlack");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create2.large.worker.js b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create2.large.worker.js
new file mode 100644
index 0000000000..57dda69d4d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create2.large.worker.js
@@ -0,0 +1,31 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.imageData.create2.large
+// Description:createImageData(sw, sh) works for sizes much larger than the canvas
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("createImageData(sw, sh) works for sizes much larger than the canvas");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var imgdata = ctx.createImageData(1000, 2000);
+_assertSame(imgdata.data.length, imgdata.width*imgdata.height*4, "imgdata.data.length", "imgdata.width*imgdata.height*4");
+_assert(imgdata.width < imgdata.height, "imgdata.width < imgdata.height");
+_assert(imgdata.width > 0, "imgdata.width > 0");
+var isTransparentBlack = true;
+for (var i = 0; i < imgdata.data.length; i += 7813) // check ~1024 points (assuming normal scaling)
+ if (imgdata.data[i] !== 0)
+ isTransparentBlack = false;
+_assert(isTransparentBlack, "isTransparentBlack");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create2.negative.html b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create2.negative.html
new file mode 100644
index 0000000000..f4b4df99a8
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create2.negative.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.imageData.create2.negative</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.imageData.create2.negative</h1>
+<p class="desc">createImageData(sw, sh) takes the absolute magnitude of the size arguments</p>
+
+
+<script>
+var t = async_test("createImageData(sw, sh) takes the absolute magnitude of the size arguments");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var imgdata1 = ctx.createImageData(10, 20);
+var imgdata2 = ctx.createImageData(-10, 20);
+var imgdata3 = ctx.createImageData(10, -20);
+var imgdata4 = ctx.createImageData(-10, -20);
+_assertSame(imgdata1.data.length, imgdata2.data.length, "imgdata1.data.length", "imgdata2.data.length");
+_assertSame(imgdata2.data.length, imgdata3.data.length, "imgdata2.data.length", "imgdata3.data.length");
+_assertSame(imgdata3.data.length, imgdata4.data.length, "imgdata3.data.length", "imgdata4.data.length");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create2.negative.worker.js b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create2.negative.worker.js
new file mode 100644
index 0000000000..a5cb857295
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create2.negative.worker.js
@@ -0,0 +1,29 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.imageData.create2.negative
+// Description:createImageData(sw, sh) takes the absolute magnitude of the size arguments
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("createImageData(sw, sh) takes the absolute magnitude of the size arguments");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var imgdata1 = ctx.createImageData(10, 20);
+var imgdata2 = ctx.createImageData(-10, 20);
+var imgdata3 = ctx.createImageData(10, -20);
+var imgdata4 = ctx.createImageData(-10, -20);
+_assertSame(imgdata1.data.length, imgdata2.data.length, "imgdata1.data.length", "imgdata2.data.length");
+_assertSame(imgdata2.data.length, imgdata3.data.length, "imgdata2.data.length", "imgdata3.data.length");
+_assertSame(imgdata3.data.length, imgdata4.data.length, "imgdata3.data.length", "imgdata4.data.length");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create2.nonfinite.html b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create2.nonfinite.html
new file mode 100644
index 0000000000..d7d1e7f756
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create2.nonfinite.html
@@ -0,0 +1,43 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.imageData.create2.nonfinite</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.imageData.create2.nonfinite</h1>
+<p class="desc">createImageData() throws TypeError if arguments are not finite</p>
+
+
+<script>
+var t = async_test("createImageData() throws TypeError if arguments are not finite");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_js(TypeError, function() { ctx.createImageData(Infinity, 10); });
+assert_throws_js(TypeError, function() { ctx.createImageData(-Infinity, 10); });
+assert_throws_js(TypeError, function() { ctx.createImageData(NaN, 10); });
+assert_throws_js(TypeError, function() { ctx.createImageData(10, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createImageData(10, -Infinity); });
+assert_throws_js(TypeError, function() { ctx.createImageData(10, NaN); });
+assert_throws_js(TypeError, function() { ctx.createImageData(Infinity, Infinity); });
+var posinfobj = { valueOf: function() { return Infinity; } },
+ neginfobj = { valueOf: function() { return -Infinity; } },
+ nanobj = { valueOf: function() { return -Infinity; } };
+assert_throws_js(TypeError, function() { ctx.createImageData(posinfobj, 10); });
+assert_throws_js(TypeError, function() { ctx.createImageData(neginfobj, 10); });
+assert_throws_js(TypeError, function() { ctx.createImageData(nanobj, 10); });
+assert_throws_js(TypeError, function() { ctx.createImageData(10, posinfobj); });
+assert_throws_js(TypeError, function() { ctx.createImageData(10, neginfobj); });
+assert_throws_js(TypeError, function() { ctx.createImageData(10, nanobj); });
+assert_throws_js(TypeError, function() { ctx.createImageData(posinfobj, posinfobj); });
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create2.nonfinite.worker.js b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create2.nonfinite.worker.js
new file mode 100644
index 0000000000..f398e2a5d4
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create2.nonfinite.worker.js
@@ -0,0 +1,39 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.imageData.create2.nonfinite
+// Description:createImageData() throws TypeError if arguments are not finite
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("createImageData() throws TypeError if arguments are not finite");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_js(TypeError, function() { ctx.createImageData(Infinity, 10); });
+assert_throws_js(TypeError, function() { ctx.createImageData(-Infinity, 10); });
+assert_throws_js(TypeError, function() { ctx.createImageData(NaN, 10); });
+assert_throws_js(TypeError, function() { ctx.createImageData(10, Infinity); });
+assert_throws_js(TypeError, function() { ctx.createImageData(10, -Infinity); });
+assert_throws_js(TypeError, function() { ctx.createImageData(10, NaN); });
+assert_throws_js(TypeError, function() { ctx.createImageData(Infinity, Infinity); });
+var posinfobj = { valueOf: function() { return Infinity; } },
+ neginfobj = { valueOf: function() { return -Infinity; } },
+ nanobj = { valueOf: function() { return -Infinity; } };
+assert_throws_js(TypeError, function() { ctx.createImageData(posinfobj, 10); });
+assert_throws_js(TypeError, function() { ctx.createImageData(neginfobj, 10); });
+assert_throws_js(TypeError, function() { ctx.createImageData(nanobj, 10); });
+assert_throws_js(TypeError, function() { ctx.createImageData(10, posinfobj); });
+assert_throws_js(TypeError, function() { ctx.createImageData(10, neginfobj); });
+assert_throws_js(TypeError, function() { ctx.createImageData(10, nanobj); });
+assert_throws_js(TypeError, function() { ctx.createImageData(posinfobj, posinfobj); });
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create2.round.html b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create2.round.html
new file mode 100644
index 0000000000..f2f0aa89e2
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create2.round.html
@@ -0,0 +1,30 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.imageData.create2.round</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.imageData.create2.round</h1>
+<p class="desc">createImageData(w, h) is rounded the same as getImageData(0, 0, w, h)</p>
+
+
+<script>
+var t = async_test("createImageData(w, h) is rounded the same as getImageData(0, 0, w, h)");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var imgdata1 = ctx.createImageData(10.01, 10.99);
+var imgdata2 = ctx.getImageData(0, 0, 10.01, 10.99);
+_assertSame(imgdata1.width, imgdata2.width, "imgdata1.width", "imgdata2.width");
+_assertSame(imgdata1.height, imgdata2.height, "imgdata1.height", "imgdata2.height");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create2.round.worker.js b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create2.round.worker.js
new file mode 100644
index 0000000000..2387498418
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create2.round.worker.js
@@ -0,0 +1,26 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.imageData.create2.round
+// Description:createImageData(w, h) is rounded the same as getImageData(0, 0, w, h)
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("createImageData(w, h) is rounded the same as getImageData(0, 0, w, h)");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var imgdata1 = ctx.createImageData(10.01, 10.99);
+var imgdata2 = ctx.getImageData(0, 0, 10.01, 10.99);
+_assertSame(imgdata1.width, imgdata2.width, "imgdata1.width", "imgdata2.width");
+_assertSame(imgdata1.height, imgdata2.height, "imgdata1.height", "imgdata2.height");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create2.zero.html b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create2.zero.html
new file mode 100644
index 0000000000..7c3a2d9410
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create2.zero.html
@@ -0,0 +1,29 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.imageData.create2.zero</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.imageData.create2.zero</h1>
+<p class="desc">createImageData(sw, sh) throws INDEX_SIZE_ERR if size is zero</p>
+
+
+<script>
+var t = async_test("createImageData(sw, sh) throws INDEX_SIZE_ERR if size is zero");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_dom("INDEX_SIZE_ERR", function() { ctx.createImageData(10, 0); });
+assert_throws_dom("INDEX_SIZE_ERR", function() { ctx.createImageData(0, 10); });
+assert_throws_dom("INDEX_SIZE_ERR", function() { ctx.createImageData(0, 0); });
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create2.zero.worker.js b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create2.zero.worker.js
new file mode 100644
index 0000000000..615a989e68
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.create2.zero.worker.js
@@ -0,0 +1,25 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.imageData.create2.zero
+// Description:createImageData(sw, sh) throws INDEX_SIZE_ERR if size is zero
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("createImageData(sw, sh) throws INDEX_SIZE_ERR if size is zero");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_dom("INDEX_SIZE_ERR", function() { ctx.createImageData(10, 0); });
+assert_throws_dom("INDEX_SIZE_ERR", function() { ctx.createImageData(0, 10); });
+assert_throws_dom("INDEX_SIZE_ERR", function() { ctx.createImageData(0, 0); });
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.basic.html b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.basic.html
new file mode 100644
index 0000000000..d4f4a63b3a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.basic.html
@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.imageData.get.basic</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.imageData.get.basic</h1>
+<p class="desc">getImageData() exists and returns something</p>
+
+
+<script>
+var t = async_test("getImageData() exists and returns something");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertDifferent(ctx.getImageData(0, 0, 100, 50), null, "ctx.getImageData(0, 0, 100, 50)", "null");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.basic.worker.js b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.basic.worker.js
new file mode 100644
index 0000000000..8accaccc75
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.basic.worker.js
@@ -0,0 +1,23 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.imageData.get.basic
+// Description:getImageData() exists and returns something
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("getImageData() exists and returns something");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertDifferent(ctx.getImageData(0, 0, 100, 50), null, "ctx.getImageData(0, 0, 100, 50)", "null");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.clamp.html b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.clamp.html
new file mode 100644
index 0000000000..9cbc1b48dc
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.clamp.html
@@ -0,0 +1,38 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.imageData.get.clamp</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.imageData.get.clamp</h1>
+<p class="desc">getImageData() clamps colors to the range [0, 255]</p>
+
+
+<script>
+var t = async_test("getImageData() clamps colors to the range [0, 255]");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = 'rgb(-100, -200, -300)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = 'rgb(256, 300, 400)';
+ctx.fillRect(20, 10, 60, 10);
+var imgdata1 = ctx.getImageData(10, 5, 1, 1);
+_assertSame(imgdata1.data[0], 0, "imgdata1.data[\""+(0)+"\"]", "0");
+_assertSame(imgdata1.data[1], 0, "imgdata1.data[\""+(1)+"\"]", "0");
+_assertSame(imgdata1.data[2], 0, "imgdata1.data[\""+(2)+"\"]", "0");
+var imgdata2 = ctx.getImageData(30, 15, 1, 1);
+_assertSame(imgdata2.data[0], 255, "imgdata2.data[\""+(0)+"\"]", "255");
+_assertSame(imgdata2.data[1], 255, "imgdata2.data[\""+(1)+"\"]", "255");
+_assertSame(imgdata2.data[2], 255, "imgdata2.data[\""+(2)+"\"]", "255");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.clamp.worker.js b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.clamp.worker.js
new file mode 100644
index 0000000000..ceeb8d5d86
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.clamp.worker.js
@@ -0,0 +1,34 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.imageData.get.clamp
+// Description:getImageData() clamps colors to the range [0, 255]
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("getImageData() clamps colors to the range [0, 255]");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = 'rgb(-100, -200, -300)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = 'rgb(256, 300, 400)';
+ctx.fillRect(20, 10, 60, 10);
+var imgdata1 = ctx.getImageData(10, 5, 1, 1);
+_assertSame(imgdata1.data[0], 0, "imgdata1.data[\""+(0)+"\"]", "0");
+_assertSame(imgdata1.data[1], 0, "imgdata1.data[\""+(1)+"\"]", "0");
+_assertSame(imgdata1.data[2], 0, "imgdata1.data[\""+(2)+"\"]", "0");
+var imgdata2 = ctx.getImageData(30, 15, 1, 1);
+_assertSame(imgdata2.data[0], 255, "imgdata2.data[\""+(0)+"\"]", "255");
+_assertSame(imgdata2.data[1], 255, "imgdata2.data[\""+(1)+"\"]", "255");
+_assertSame(imgdata2.data[2], 255, "imgdata2.data[\""+(2)+"\"]", "255");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.length.html b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.length.html
new file mode 100644
index 0000000000..2f7247fafc
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.length.html
@@ -0,0 +1,28 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.imageData.get.length</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.imageData.get.length</h1>
+<p class="desc">getImageData() returns a correctly-sized Uint8ClampedArray</p>
+
+
+<script>
+var t = async_test("getImageData() returns a correctly-sized Uint8ClampedArray");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var imgdata = ctx.getImageData(0, 0, 10, 10);
+_assertSame(imgdata.data.length, imgdata.width*imgdata.height*4, "imgdata.data.length", "imgdata.width*imgdata.height*4");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.length.worker.js b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.length.worker.js
new file mode 100644
index 0000000000..dd2e3dd6c5
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.length.worker.js
@@ -0,0 +1,24 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.imageData.get.length
+// Description:getImageData() returns a correctly-sized Uint8ClampedArray
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("getImageData() returns a correctly-sized Uint8ClampedArray");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var imgdata = ctx.getImageData(0, 0, 10, 10);
+_assertSame(imgdata.data.length, imgdata.width*imgdata.height*4, "imgdata.data.length", "imgdata.width*imgdata.height*4");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.nonfinite.html b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.nonfinite.html
new file mode 100644
index 0000000000..5efc73663d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.nonfinite.html
@@ -0,0 +1,75 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.imageData.get.nonfinite</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.imageData.get.nonfinite</h1>
+<p class="desc">getImageData() throws TypeError if arguments are not finite</p>
+
+
+<script>
+var t = async_test("getImageData() throws TypeError if arguments are not finite");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_js(TypeError, function() { ctx.getImageData(Infinity, 10, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.getImageData(-Infinity, 10, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.getImageData(NaN, 10, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.getImageData(10, Infinity, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.getImageData(10, -Infinity, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.getImageData(10, NaN, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.getImageData(10, 10, Infinity, 10); });
+assert_throws_js(TypeError, function() { ctx.getImageData(10, 10, -Infinity, 10); });
+assert_throws_js(TypeError, function() { ctx.getImageData(10, 10, NaN, 10); });
+assert_throws_js(TypeError, function() { ctx.getImageData(10, 10, 10, Infinity); });
+assert_throws_js(TypeError, function() { ctx.getImageData(10, 10, 10, -Infinity); });
+assert_throws_js(TypeError, function() { ctx.getImageData(10, 10, 10, NaN); });
+assert_throws_js(TypeError, function() { ctx.getImageData(Infinity, Infinity, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.getImageData(Infinity, Infinity, Infinity, 10); });
+assert_throws_js(TypeError, function() { ctx.getImageData(Infinity, Infinity, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.getImageData(Infinity, Infinity, 10, Infinity); });
+assert_throws_js(TypeError, function() { ctx.getImageData(Infinity, 10, Infinity, 10); });
+assert_throws_js(TypeError, function() { ctx.getImageData(Infinity, 10, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.getImageData(Infinity, 10, 10, Infinity); });
+assert_throws_js(TypeError, function() { ctx.getImageData(10, Infinity, Infinity, 10); });
+assert_throws_js(TypeError, function() { ctx.getImageData(10, Infinity, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.getImageData(10, Infinity, 10, Infinity); });
+assert_throws_js(TypeError, function() { ctx.getImageData(10, 10, Infinity, Infinity); });
+var posinfobj = { valueOf: function() { return Infinity; } },
+ neginfobj = { valueOf: function() { return -Infinity; } },
+ nanobj = { valueOf: function() { return -Infinity; } };
+assert_throws_js(TypeError, function() { ctx.getImageData(posinfobj, 10, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.getImageData(neginfobj, 10, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.getImageData(nanobj, 10, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.getImageData(10, posinfobj, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.getImageData(10, neginfobj, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.getImageData(10, nanobj, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.getImageData(10, 10, posinfobj, 10); });
+assert_throws_js(TypeError, function() { ctx.getImageData(10, 10, neginfobj, 10); });
+assert_throws_js(TypeError, function() { ctx.getImageData(10, 10, nanobj, 10); });
+assert_throws_js(TypeError, function() { ctx.getImageData(10, 10, 10, posinfobj); });
+assert_throws_js(TypeError, function() { ctx.getImageData(10, 10, 10, neginfobj); });
+assert_throws_js(TypeError, function() { ctx.getImageData(10, 10, 10, nanobj); });
+assert_throws_js(TypeError, function() { ctx.getImageData(posinfobj, posinfobj, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.getImageData(posinfobj, posinfobj, posinfobj, 10); });
+assert_throws_js(TypeError, function() { ctx.getImageData(posinfobj, posinfobj, posinfobj, posinfobj); });
+assert_throws_js(TypeError, function() { ctx.getImageData(posinfobj, posinfobj, 10, posinfobj); });
+assert_throws_js(TypeError, function() { ctx.getImageData(posinfobj, 10, posinfobj, 10); });
+assert_throws_js(TypeError, function() { ctx.getImageData(posinfobj, 10, posinfobj, posinfobj); });
+assert_throws_js(TypeError, function() { ctx.getImageData(posinfobj, 10, 10, posinfobj); });
+assert_throws_js(TypeError, function() { ctx.getImageData(10, posinfobj, posinfobj, 10); });
+assert_throws_js(TypeError, function() { ctx.getImageData(10, posinfobj, posinfobj, posinfobj); });
+assert_throws_js(TypeError, function() { ctx.getImageData(10, posinfobj, 10, posinfobj); });
+assert_throws_js(TypeError, function() { ctx.getImageData(10, 10, posinfobj, posinfobj); });
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.nonfinite.worker.js b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.nonfinite.worker.js
new file mode 100644
index 0000000000..15b3950adc
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.nonfinite.worker.js
@@ -0,0 +1,71 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.imageData.get.nonfinite
+// Description:getImageData() throws TypeError if arguments are not finite
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("getImageData() throws TypeError if arguments are not finite");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_js(TypeError, function() { ctx.getImageData(Infinity, 10, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.getImageData(-Infinity, 10, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.getImageData(NaN, 10, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.getImageData(10, Infinity, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.getImageData(10, -Infinity, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.getImageData(10, NaN, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.getImageData(10, 10, Infinity, 10); });
+assert_throws_js(TypeError, function() { ctx.getImageData(10, 10, -Infinity, 10); });
+assert_throws_js(TypeError, function() { ctx.getImageData(10, 10, NaN, 10); });
+assert_throws_js(TypeError, function() { ctx.getImageData(10, 10, 10, Infinity); });
+assert_throws_js(TypeError, function() { ctx.getImageData(10, 10, 10, -Infinity); });
+assert_throws_js(TypeError, function() { ctx.getImageData(10, 10, 10, NaN); });
+assert_throws_js(TypeError, function() { ctx.getImageData(Infinity, Infinity, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.getImageData(Infinity, Infinity, Infinity, 10); });
+assert_throws_js(TypeError, function() { ctx.getImageData(Infinity, Infinity, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.getImageData(Infinity, Infinity, 10, Infinity); });
+assert_throws_js(TypeError, function() { ctx.getImageData(Infinity, 10, Infinity, 10); });
+assert_throws_js(TypeError, function() { ctx.getImageData(Infinity, 10, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.getImageData(Infinity, 10, 10, Infinity); });
+assert_throws_js(TypeError, function() { ctx.getImageData(10, Infinity, Infinity, 10); });
+assert_throws_js(TypeError, function() { ctx.getImageData(10, Infinity, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.getImageData(10, Infinity, 10, Infinity); });
+assert_throws_js(TypeError, function() { ctx.getImageData(10, 10, Infinity, Infinity); });
+var posinfobj = { valueOf: function() { return Infinity; } },
+ neginfobj = { valueOf: function() { return -Infinity; } },
+ nanobj = { valueOf: function() { return -Infinity; } };
+assert_throws_js(TypeError, function() { ctx.getImageData(posinfobj, 10, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.getImageData(neginfobj, 10, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.getImageData(nanobj, 10, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.getImageData(10, posinfobj, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.getImageData(10, neginfobj, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.getImageData(10, nanobj, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.getImageData(10, 10, posinfobj, 10); });
+assert_throws_js(TypeError, function() { ctx.getImageData(10, 10, neginfobj, 10); });
+assert_throws_js(TypeError, function() { ctx.getImageData(10, 10, nanobj, 10); });
+assert_throws_js(TypeError, function() { ctx.getImageData(10, 10, 10, posinfobj); });
+assert_throws_js(TypeError, function() { ctx.getImageData(10, 10, 10, neginfobj); });
+assert_throws_js(TypeError, function() { ctx.getImageData(10, 10, 10, nanobj); });
+assert_throws_js(TypeError, function() { ctx.getImageData(posinfobj, posinfobj, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.getImageData(posinfobj, posinfobj, posinfobj, 10); });
+assert_throws_js(TypeError, function() { ctx.getImageData(posinfobj, posinfobj, posinfobj, posinfobj); });
+assert_throws_js(TypeError, function() { ctx.getImageData(posinfobj, posinfobj, 10, posinfobj); });
+assert_throws_js(TypeError, function() { ctx.getImageData(posinfobj, 10, posinfobj, 10); });
+assert_throws_js(TypeError, function() { ctx.getImageData(posinfobj, 10, posinfobj, posinfobj); });
+assert_throws_js(TypeError, function() { ctx.getImageData(posinfobj, 10, 10, posinfobj); });
+assert_throws_js(TypeError, function() { ctx.getImageData(10, posinfobj, posinfobj, 10); });
+assert_throws_js(TypeError, function() { ctx.getImageData(10, posinfobj, posinfobj, posinfobj); });
+assert_throws_js(TypeError, function() { ctx.getImageData(10, posinfobj, 10, posinfobj); });
+assert_throws_js(TypeError, function() { ctx.getImageData(10, 10, posinfobj, posinfobj); });
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.nonpremul.html b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.nonpremul.html
new file mode 100644
index 0000000000..bed3294be4
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.nonpremul.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.imageData.get.nonpremul</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.imageData.get.nonpremul</h1>
+<p class="desc">getImageData() returns non-premultiplied colors</p>
+
+
+<script>
+var t = async_test("getImageData() returns non-premultiplied colors");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = 'rgba(255, 255, 255, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+var imgdata = ctx.getImageData(10, 10, 10, 10);
+_assert(imgdata.data[0] > 200, "imgdata.data[\""+(0)+"\"] > 200");
+_assert(imgdata.data[1] > 200, "imgdata.data[\""+(1)+"\"] > 200");
+_assert(imgdata.data[2] > 200, "imgdata.data[\""+(2)+"\"] > 200");
+_assert(imgdata.data[3] > 100, "imgdata.data[\""+(3)+"\"] > 100");
+_assert(imgdata.data[3] < 200, "imgdata.data[\""+(3)+"\"] < 200");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.nonpremul.worker.js b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.nonpremul.worker.js
new file mode 100644
index 0000000000..d568c31b38
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.nonpremul.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.imageData.get.nonpremul
+// Description:getImageData() returns non-premultiplied colors
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("getImageData() returns non-premultiplied colors");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = 'rgba(255, 255, 255, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+var imgdata = ctx.getImageData(10, 10, 10, 10);
+_assert(imgdata.data[0] > 200, "imgdata.data[\""+(0)+"\"] > 200");
+_assert(imgdata.data[1] > 200, "imgdata.data[\""+(1)+"\"] > 200");
+_assert(imgdata.data[2] > 200, "imgdata.data[\""+(2)+"\"] > 200");
+_assert(imgdata.data[3] > 100, "imgdata.data[\""+(3)+"\"] > 100");
+_assert(imgdata.data[3] < 200, "imgdata.data[\""+(3)+"\"] < 200");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.order.alpha.html b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.order.alpha.html
new file mode 100644
index 0000000000..a169cb59e3
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.order.alpha.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.imageData.get.order.alpha</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.imageData.get.order.alpha</h1>
+<p class="desc">getImageData() returns A in the fourth component</p>
+
+
+<script>
+var t = async_test("getImageData() returns A in the fourth component");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = 'rgba(0, 0, 0, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+var imgdata = ctx.getImageData(0, 0, 10, 10);
+_assert(imgdata.data[3] < 200, "imgdata.data[\""+(3)+"\"] < 200");
+_assert(imgdata.data[3] > 100, "imgdata.data[\""+(3)+"\"] > 100");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.order.alpha.worker.js b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.order.alpha.worker.js
new file mode 100644
index 0000000000..038844816f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.order.alpha.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.imageData.get.order.alpha
+// Description:getImageData() returns A in the fourth component
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("getImageData() returns A in the fourth component");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = 'rgba(0, 0, 0, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+var imgdata = ctx.getImageData(0, 0, 10, 10);
+_assert(imgdata.data[3] < 200, "imgdata.data[\""+(3)+"\"] < 200");
+_assert(imgdata.data[3] > 100, "imgdata.data[\""+(3)+"\"] > 100");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.order.cols.html b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.order.cols.html
new file mode 100644
index 0000000000..09eb58a7fd
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.order.cols.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.imageData.get.order.cols</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.imageData.get.order.cols</h1>
+<p class="desc">getImageData() returns leftmost columns first</p>
+
+
+<script>
+var t = async_test("getImageData() returns leftmost columns first");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#fff';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#000';
+ctx.fillRect(0, 0, 2, 50);
+var imgdata = ctx.getImageData(0, 0, 10, 10);
+_assertSame(imgdata.data[0], 0, "imgdata.data[\""+(0)+"\"]", "0");
+_assertSame(imgdata.data[Math.round(imgdata.width/2*4)], 255, "imgdata.data[Math.round(imgdata.width/2*4)]", "255");
+_assertSame(imgdata.data[Math.round((imgdata.height/2)*imgdata.width*4)], 0, "imgdata.data[Math.round((imgdata.height/2)*imgdata.width*4)]", "0");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.order.cols.worker.js b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.order.cols.worker.js
new file mode 100644
index 0000000000..6a13c4dee6
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.order.cols.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.imageData.get.order.cols
+// Description:getImageData() returns leftmost columns first
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("getImageData() returns leftmost columns first");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#fff';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#000';
+ctx.fillRect(0, 0, 2, 50);
+var imgdata = ctx.getImageData(0, 0, 10, 10);
+_assertSame(imgdata.data[0], 0, "imgdata.data[\""+(0)+"\"]", "0");
+_assertSame(imgdata.data[Math.round(imgdata.width/2*4)], 255, "imgdata.data[Math.round(imgdata.width/2*4)]", "255");
+_assertSame(imgdata.data[Math.round((imgdata.height/2)*imgdata.width*4)], 0, "imgdata.data[Math.round((imgdata.height/2)*imgdata.width*4)]", "0");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.order.rgb.html b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.order.rgb.html
new file mode 100644
index 0000000000..b56adf19fe
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.order.rgb.html
@@ -0,0 +1,37 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.imageData.get.order.rgb</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.imageData.get.order.rgb</h1>
+<p class="desc">getImageData() returns R then G then B</p>
+
+
+<script>
+var t = async_test("getImageData() returns R then G then B");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#48c';
+ctx.fillRect(0, 0, 100, 50);
+var imgdata = ctx.getImageData(0, 0, 10, 10);
+_assertSame(imgdata.data[0], 0x44, "imgdata.data[\""+(0)+"\"]", "0x44");
+_assertSame(imgdata.data[1], 0x88, "imgdata.data[\""+(1)+"\"]", "0x88");
+_assertSame(imgdata.data[2], 0xCC, "imgdata.data[\""+(2)+"\"]", "0xCC");
+_assertSame(imgdata.data[3], 255, "imgdata.data[\""+(3)+"\"]", "255");
+_assertSame(imgdata.data[4], 0x44, "imgdata.data[\""+(4)+"\"]", "0x44");
+_assertSame(imgdata.data[5], 0x88, "imgdata.data[\""+(5)+"\"]", "0x88");
+_assertSame(imgdata.data[6], 0xCC, "imgdata.data[\""+(6)+"\"]", "0xCC");
+_assertSame(imgdata.data[7], 255, "imgdata.data[\""+(7)+"\"]", "255");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.order.rgb.worker.js b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.order.rgb.worker.js
new file mode 100644
index 0000000000..771a777b9b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.order.rgb.worker.js
@@ -0,0 +1,33 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.imageData.get.order.rgb
+// Description:getImageData() returns R then G then B
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("getImageData() returns R then G then B");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#48c';
+ctx.fillRect(0, 0, 100, 50);
+var imgdata = ctx.getImageData(0, 0, 10, 10);
+_assertSame(imgdata.data[0], 0x44, "imgdata.data[\""+(0)+"\"]", "0x44");
+_assertSame(imgdata.data[1], 0x88, "imgdata.data[\""+(1)+"\"]", "0x88");
+_assertSame(imgdata.data[2], 0xCC, "imgdata.data[\""+(2)+"\"]", "0xCC");
+_assertSame(imgdata.data[3], 255, "imgdata.data[\""+(3)+"\"]", "255");
+_assertSame(imgdata.data[4], 0x44, "imgdata.data[\""+(4)+"\"]", "0x44");
+_assertSame(imgdata.data[5], 0x88, "imgdata.data[\""+(5)+"\"]", "0x88");
+_assertSame(imgdata.data[6], 0xCC, "imgdata.data[\""+(6)+"\"]", "0xCC");
+_assertSame(imgdata.data[7], 255, "imgdata.data[\""+(7)+"\"]", "255");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.order.rows.html b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.order.rows.html
new file mode 100644
index 0000000000..3ad1ced7d2
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.order.rows.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.imageData.get.order.rows</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.imageData.get.order.rows</h1>
+<p class="desc">getImageData() returns topmost rows first</p>
+
+
+<script>
+var t = async_test("getImageData() returns topmost rows first");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#fff';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#000';
+ctx.fillRect(0, 0, 100, 2);
+var imgdata = ctx.getImageData(0, 0, 10, 10);
+_assertSame(imgdata.data[0], 0, "imgdata.data[\""+(0)+"\"]", "0");
+_assertSame(imgdata.data[Math.floor(imgdata.width/2*4)], 0, "imgdata.data[Math.floor(imgdata.width/2*4)]", "0");
+_assertSame(imgdata.data[(imgdata.height/2)*imgdata.width*4], 255, "imgdata.data[(imgdata.height/2)*imgdata.width*4]", "255");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.order.rows.worker.js b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.order.rows.worker.js
new file mode 100644
index 0000000000..1f75f9301c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.order.rows.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.imageData.get.order.rows
+// Description:getImageData() returns topmost rows first
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("getImageData() returns topmost rows first");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#fff';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#000';
+ctx.fillRect(0, 0, 100, 2);
+var imgdata = ctx.getImageData(0, 0, 10, 10);
+_assertSame(imgdata.data[0], 0, "imgdata.data[\""+(0)+"\"]", "0");
+_assertSame(imgdata.data[Math.floor(imgdata.width/2*4)], 0, "imgdata.data[Math.floor(imgdata.width/2*4)]", "0");
+_assertSame(imgdata.data[(imgdata.height/2)*imgdata.width*4], 255, "imgdata.data[(imgdata.height/2)*imgdata.width*4]", "255");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.range.html b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.range.html
new file mode 100644
index 0000000000..283dd07b4c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.range.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.imageData.get.range</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.imageData.get.range</h1>
+<p class="desc">getImageData() returns values in the range [0, 255]</p>
+
+
+<script>
+var t = async_test("getImageData() returns values in the range [0, 255]");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#000';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#fff';
+ctx.fillRect(20, 10, 60, 10);
+var imgdata1 = ctx.getImageData(10, 5, 1, 1);
+_assertSame(imgdata1.data[0], 0, "imgdata1.data[\""+(0)+"\"]", "0");
+var imgdata2 = ctx.getImageData(30, 15, 1, 1);
+_assertSame(imgdata2.data[0], 255, "imgdata2.data[\""+(0)+"\"]", "255");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.range.worker.js b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.range.worker.js
new file mode 100644
index 0000000000..9389c22bd3
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.range.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.imageData.get.range
+// Description:getImageData() returns values in the range [0, 255]
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("getImageData() returns values in the range [0, 255]");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#000';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#fff';
+ctx.fillRect(20, 10, 60, 10);
+var imgdata1 = ctx.getImageData(10, 5, 1, 1);
+_assertSame(imgdata1.data[0], 0, "imgdata1.data[\""+(0)+"\"]", "0");
+var imgdata2 = ctx.getImageData(30, 15, 1, 1);
+_assertSame(imgdata2.data[0], 255, "imgdata2.data[\""+(0)+"\"]", "255");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.source.negative.html b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.source.negative.html
new file mode 100644
index 0000000000..a7e3d8574f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.source.negative.html
@@ -0,0 +1,44 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.imageData.get.source.negative</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.imageData.get.source.negative</h1>
+<p class="desc">getImageData() works with negative width and height, and returns top-to-bottom left-to-right</p>
+
+
+<script>
+var t = async_test("getImageData() works with negative width and height, and returns top-to-bottom left-to-right");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#000';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#fff';
+ctx.fillRect(20, 10, 60, 10);
+var imgdata1 = ctx.getImageData(85, 25, -10, -10);
+_assertSame(imgdata1.data[0], 255, "imgdata1.data[\""+(0)+"\"]", "255");
+_assertSame(imgdata1.data[1], 255, "imgdata1.data[\""+(1)+"\"]", "255");
+_assertSame(imgdata1.data[2], 255, "imgdata1.data[\""+(2)+"\"]", "255");
+_assertSame(imgdata1.data[3], 255, "imgdata1.data[\""+(3)+"\"]", "255");
+_assertSame(imgdata1.data[imgdata1.data.length-4+0], 0, "imgdata1.data[imgdata1.data.length-4+0]", "0");
+_assertSame(imgdata1.data[imgdata1.data.length-4+1], 0, "imgdata1.data[imgdata1.data.length-4+1]", "0");
+_assertSame(imgdata1.data[imgdata1.data.length-4+2], 0, "imgdata1.data[imgdata1.data.length-4+2]", "0");
+_assertSame(imgdata1.data[imgdata1.data.length-4+3], 255, "imgdata1.data[imgdata1.data.length-4+3]", "255");
+var imgdata2 = ctx.getImageData(0, 0, -1, -1);
+_assertSame(imgdata2.data[0], 0, "imgdata2.data[\""+(0)+"\"]", "0");
+_assertSame(imgdata2.data[1], 0, "imgdata2.data[\""+(1)+"\"]", "0");
+_assertSame(imgdata2.data[2], 0, "imgdata2.data[\""+(2)+"\"]", "0");
+_assertSame(imgdata2.data[3], 0, "imgdata2.data[\""+(3)+"\"]", "0");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.source.negative.worker.js b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.source.negative.worker.js
new file mode 100644
index 0000000000..e057315d57
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.source.negative.worker.js
@@ -0,0 +1,40 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.imageData.get.source.negative
+// Description:getImageData() works with negative width and height, and returns top-to-bottom left-to-right
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("getImageData() works with negative width and height, and returns top-to-bottom left-to-right");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#000';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#fff';
+ctx.fillRect(20, 10, 60, 10);
+var imgdata1 = ctx.getImageData(85, 25, -10, -10);
+_assertSame(imgdata1.data[0], 255, "imgdata1.data[\""+(0)+"\"]", "255");
+_assertSame(imgdata1.data[1], 255, "imgdata1.data[\""+(1)+"\"]", "255");
+_assertSame(imgdata1.data[2], 255, "imgdata1.data[\""+(2)+"\"]", "255");
+_assertSame(imgdata1.data[3], 255, "imgdata1.data[\""+(3)+"\"]", "255");
+_assertSame(imgdata1.data[imgdata1.data.length-4+0], 0, "imgdata1.data[imgdata1.data.length-4+0]", "0");
+_assertSame(imgdata1.data[imgdata1.data.length-4+1], 0, "imgdata1.data[imgdata1.data.length-4+1]", "0");
+_assertSame(imgdata1.data[imgdata1.data.length-4+2], 0, "imgdata1.data[imgdata1.data.length-4+2]", "0");
+_assertSame(imgdata1.data[imgdata1.data.length-4+3], 255, "imgdata1.data[imgdata1.data.length-4+3]", "255");
+var imgdata2 = ctx.getImageData(0, 0, -1, -1);
+_assertSame(imgdata2.data[0], 0, "imgdata2.data[\""+(0)+"\"]", "0");
+_assertSame(imgdata2.data[1], 0, "imgdata2.data[\""+(1)+"\"]", "0");
+_assertSame(imgdata2.data[2], 0, "imgdata2.data[\""+(2)+"\"]", "0");
+_assertSame(imgdata2.data[3], 0, "imgdata2.data[\""+(3)+"\"]", "0");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.source.outside.html b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.source.outside.html
new file mode 100644
index 0000000000..a071e44d55
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.source.outside.html
@@ -0,0 +1,79 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.imageData.get.source.outside</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.imageData.get.source.outside</h1>
+<p class="desc">getImageData() returns transparent black outside the canvas</p>
+
+
+<script>
+var t = async_test("getImageData() returns transparent black outside the canvas");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#08f';
+ctx.fillRect(0, 0, 100, 50);
+var imgdata1 = ctx.getImageData(-10, 5, 1, 1);
+_assertSame(imgdata1.data[0], 0, "imgdata1.data[\""+(0)+"\"]", "0");
+_assertSame(imgdata1.data[1], 0, "imgdata1.data[\""+(1)+"\"]", "0");
+_assertSame(imgdata1.data[2], 0, "imgdata1.data[\""+(2)+"\"]", "0");
+_assertSame(imgdata1.data[3], 0, "imgdata1.data[\""+(3)+"\"]", "0");
+var imgdata2 = ctx.getImageData(10, -5, 1, 1);
+_assertSame(imgdata2.data[0], 0, "imgdata2.data[\""+(0)+"\"]", "0");
+_assertSame(imgdata2.data[1], 0, "imgdata2.data[\""+(1)+"\"]", "0");
+_assertSame(imgdata2.data[2], 0, "imgdata2.data[\""+(2)+"\"]", "0");
+_assertSame(imgdata2.data[3], 0, "imgdata2.data[\""+(3)+"\"]", "0");
+var imgdata3 = ctx.getImageData(200, 5, 1, 1);
+_assertSame(imgdata3.data[0], 0, "imgdata3.data[\""+(0)+"\"]", "0");
+_assertSame(imgdata3.data[1], 0, "imgdata3.data[\""+(1)+"\"]", "0");
+_assertSame(imgdata3.data[2], 0, "imgdata3.data[\""+(2)+"\"]", "0");
+_assertSame(imgdata3.data[3], 0, "imgdata3.data[\""+(3)+"\"]", "0");
+var imgdata4 = ctx.getImageData(10, 60, 1, 1);
+_assertSame(imgdata4.data[0], 0, "imgdata4.data[\""+(0)+"\"]", "0");
+_assertSame(imgdata4.data[1], 0, "imgdata4.data[\""+(1)+"\"]", "0");
+_assertSame(imgdata4.data[2], 0, "imgdata4.data[\""+(2)+"\"]", "0");
+_assertSame(imgdata4.data[3], 0, "imgdata4.data[\""+(3)+"\"]", "0");
+var imgdata5 = ctx.getImageData(100, 10, 1, 1);
+_assertSame(imgdata5.data[0], 0, "imgdata5.data[\""+(0)+"\"]", "0");
+_assertSame(imgdata5.data[1], 0, "imgdata5.data[\""+(1)+"\"]", "0");
+_assertSame(imgdata5.data[2], 0, "imgdata5.data[\""+(2)+"\"]", "0");
+_assertSame(imgdata5.data[3], 0, "imgdata5.data[\""+(3)+"\"]", "0");
+var imgdata6 = ctx.getImageData(0, 10, 1, 1);
+_assertSame(imgdata6.data[0], 0, "imgdata6.data[\""+(0)+"\"]", "0");
+_assertSame(imgdata6.data[1], 136, "imgdata6.data[\""+(1)+"\"]", "136");
+_assertSame(imgdata6.data[2], 255, "imgdata6.data[\""+(2)+"\"]", "255");
+_assertSame(imgdata6.data[3], 255, "imgdata6.data[\""+(3)+"\"]", "255");
+var imgdata7 = ctx.getImageData(-10, 10, 20, 20);
+_assertSame(imgdata7.data[ 0*4+0], 0, "imgdata7.data[ 0*4+0]", "0");
+_assertSame(imgdata7.data[ 0*4+1], 0, "imgdata7.data[ 0*4+1]", "0");
+_assertSame(imgdata7.data[ 0*4+2], 0, "imgdata7.data[ 0*4+2]", "0");
+_assertSame(imgdata7.data[ 0*4+3], 0, "imgdata7.data[ 0*4+3]", "0");
+_assertSame(imgdata7.data[ 9*4+0], 0, "imgdata7.data[ 9*4+0]", "0");
+_assertSame(imgdata7.data[ 9*4+1], 0, "imgdata7.data[ 9*4+1]", "0");
+_assertSame(imgdata7.data[ 9*4+2], 0, "imgdata7.data[ 9*4+2]", "0");
+_assertSame(imgdata7.data[ 9*4+3], 0, "imgdata7.data[ 9*4+3]", "0");
+_assertSame(imgdata7.data[10*4+0], 0, "imgdata7.data[10*4+0]", "0");
+_assertSame(imgdata7.data[10*4+1], 136, "imgdata7.data[10*4+1]", "136");
+_assertSame(imgdata7.data[10*4+2], 255, "imgdata7.data[10*4+2]", "255");
+_assertSame(imgdata7.data[10*4+3], 255, "imgdata7.data[10*4+3]", "255");
+_assertSame(imgdata7.data[19*4+0], 0, "imgdata7.data[19*4+0]", "0");
+_assertSame(imgdata7.data[19*4+1], 136, "imgdata7.data[19*4+1]", "136");
+_assertSame(imgdata7.data[19*4+2], 255, "imgdata7.data[19*4+2]", "255");
+_assertSame(imgdata7.data[19*4+3], 255, "imgdata7.data[19*4+3]", "255");
+_assertSame(imgdata7.data[20*4+0], 0, "imgdata7.data[20*4+0]", "0");
+_assertSame(imgdata7.data[20*4+1], 0, "imgdata7.data[20*4+1]", "0");
+_assertSame(imgdata7.data[20*4+2], 0, "imgdata7.data[20*4+2]", "0");
+_assertSame(imgdata7.data[20*4+3], 0, "imgdata7.data[20*4+3]", "0");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.source.outside.worker.js b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.source.outside.worker.js
new file mode 100644
index 0000000000..4025ecd4be
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.source.outside.worker.js
@@ -0,0 +1,75 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.imageData.get.source.outside
+// Description:getImageData() returns transparent black outside the canvas
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("getImageData() returns transparent black outside the canvas");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#08f';
+ctx.fillRect(0, 0, 100, 50);
+var imgdata1 = ctx.getImageData(-10, 5, 1, 1);
+_assertSame(imgdata1.data[0], 0, "imgdata1.data[\""+(0)+"\"]", "0");
+_assertSame(imgdata1.data[1], 0, "imgdata1.data[\""+(1)+"\"]", "0");
+_assertSame(imgdata1.data[2], 0, "imgdata1.data[\""+(2)+"\"]", "0");
+_assertSame(imgdata1.data[3], 0, "imgdata1.data[\""+(3)+"\"]", "0");
+var imgdata2 = ctx.getImageData(10, -5, 1, 1);
+_assertSame(imgdata2.data[0], 0, "imgdata2.data[\""+(0)+"\"]", "0");
+_assertSame(imgdata2.data[1], 0, "imgdata2.data[\""+(1)+"\"]", "0");
+_assertSame(imgdata2.data[2], 0, "imgdata2.data[\""+(2)+"\"]", "0");
+_assertSame(imgdata2.data[3], 0, "imgdata2.data[\""+(3)+"\"]", "0");
+var imgdata3 = ctx.getImageData(200, 5, 1, 1);
+_assertSame(imgdata3.data[0], 0, "imgdata3.data[\""+(0)+"\"]", "0");
+_assertSame(imgdata3.data[1], 0, "imgdata3.data[\""+(1)+"\"]", "0");
+_assertSame(imgdata3.data[2], 0, "imgdata3.data[\""+(2)+"\"]", "0");
+_assertSame(imgdata3.data[3], 0, "imgdata3.data[\""+(3)+"\"]", "0");
+var imgdata4 = ctx.getImageData(10, 60, 1, 1);
+_assertSame(imgdata4.data[0], 0, "imgdata4.data[\""+(0)+"\"]", "0");
+_assertSame(imgdata4.data[1], 0, "imgdata4.data[\""+(1)+"\"]", "0");
+_assertSame(imgdata4.data[2], 0, "imgdata4.data[\""+(2)+"\"]", "0");
+_assertSame(imgdata4.data[3], 0, "imgdata4.data[\""+(3)+"\"]", "0");
+var imgdata5 = ctx.getImageData(100, 10, 1, 1);
+_assertSame(imgdata5.data[0], 0, "imgdata5.data[\""+(0)+"\"]", "0");
+_assertSame(imgdata5.data[1], 0, "imgdata5.data[\""+(1)+"\"]", "0");
+_assertSame(imgdata5.data[2], 0, "imgdata5.data[\""+(2)+"\"]", "0");
+_assertSame(imgdata5.data[3], 0, "imgdata5.data[\""+(3)+"\"]", "0");
+var imgdata6 = ctx.getImageData(0, 10, 1, 1);
+_assertSame(imgdata6.data[0], 0, "imgdata6.data[\""+(0)+"\"]", "0");
+_assertSame(imgdata6.data[1], 136, "imgdata6.data[\""+(1)+"\"]", "136");
+_assertSame(imgdata6.data[2], 255, "imgdata6.data[\""+(2)+"\"]", "255");
+_assertSame(imgdata6.data[3], 255, "imgdata6.data[\""+(3)+"\"]", "255");
+var imgdata7 = ctx.getImageData(-10, 10, 20, 20);
+_assertSame(imgdata7.data[ 0*4+0], 0, "imgdata7.data[ 0*4+0]", "0");
+_assertSame(imgdata7.data[ 0*4+1], 0, "imgdata7.data[ 0*4+1]", "0");
+_assertSame(imgdata7.data[ 0*4+2], 0, "imgdata7.data[ 0*4+2]", "0");
+_assertSame(imgdata7.data[ 0*4+3], 0, "imgdata7.data[ 0*4+3]", "0");
+_assertSame(imgdata7.data[ 9*4+0], 0, "imgdata7.data[ 9*4+0]", "0");
+_assertSame(imgdata7.data[ 9*4+1], 0, "imgdata7.data[ 9*4+1]", "0");
+_assertSame(imgdata7.data[ 9*4+2], 0, "imgdata7.data[ 9*4+2]", "0");
+_assertSame(imgdata7.data[ 9*4+3], 0, "imgdata7.data[ 9*4+3]", "0");
+_assertSame(imgdata7.data[10*4+0], 0, "imgdata7.data[10*4+0]", "0");
+_assertSame(imgdata7.data[10*4+1], 136, "imgdata7.data[10*4+1]", "136");
+_assertSame(imgdata7.data[10*4+2], 255, "imgdata7.data[10*4+2]", "255");
+_assertSame(imgdata7.data[10*4+3], 255, "imgdata7.data[10*4+3]", "255");
+_assertSame(imgdata7.data[19*4+0], 0, "imgdata7.data[19*4+0]", "0");
+_assertSame(imgdata7.data[19*4+1], 136, "imgdata7.data[19*4+1]", "136");
+_assertSame(imgdata7.data[19*4+2], 255, "imgdata7.data[19*4+2]", "255");
+_assertSame(imgdata7.data[19*4+3], 255, "imgdata7.data[19*4+3]", "255");
+_assertSame(imgdata7.data[20*4+0], 0, "imgdata7.data[20*4+0]", "0");
+_assertSame(imgdata7.data[20*4+1], 0, "imgdata7.data[20*4+1]", "0");
+_assertSame(imgdata7.data[20*4+2], 0, "imgdata7.data[20*4+2]", "0");
+_assertSame(imgdata7.data[20*4+3], 0, "imgdata7.data[20*4+3]", "0");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.source.size.html b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.source.size.html
new file mode 100644
index 0000000000..4fd551db7d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.source.size.html
@@ -0,0 +1,30 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.imageData.get.source.size</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.imageData.get.source.size</h1>
+<p class="desc">getImageData() returns bigger ImageData for bigger source rectangle</p>
+
+
+<script>
+var t = async_test("getImageData() returns bigger ImageData for bigger source rectangle");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var imgdata1 = ctx.getImageData(0, 0, 10, 10);
+var imgdata2 = ctx.getImageData(0, 0, 20, 20);
+_assert(imgdata2.width > imgdata1.width, "imgdata2.width > imgdata1.width");
+_assert(imgdata2.height > imgdata1.height, "imgdata2.height > imgdata1.height");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.source.size.worker.js b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.source.size.worker.js
new file mode 100644
index 0000000000..111f4b5869
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.source.size.worker.js
@@ -0,0 +1,26 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.imageData.get.source.size
+// Description:getImageData() returns bigger ImageData for bigger source rectangle
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("getImageData() returns bigger ImageData for bigger source rectangle");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var imgdata1 = ctx.getImageData(0, 0, 10, 10);
+var imgdata2 = ctx.getImageData(0, 0, 20, 20);
+_assert(imgdata2.width > imgdata1.width, "imgdata2.width > imgdata1.width");
+_assert(imgdata2.height > imgdata1.height, "imgdata2.height > imgdata1.height");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.unaffected.html b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.unaffected.html
new file mode 100644
index 0000000000..f65f015e8f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.unaffected.html
@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.imageData.get.unaffected</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.imageData.get.unaffected</h1>
+<p class="desc">getImageData() is not affected by context state</p>
+
+
+<script>
+var t = async_test("getImageData() is not affected by context state");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 50, 50)
+ctx.fillStyle = '#f00';
+ctx.fillRect(50, 0, 50, 50)
+ctx.save();
+ctx.translate(50, 0);
+ctx.globalAlpha = 0.1;
+ctx.globalCompositeOperation = 'destination-atop';
+ctx.shadowColor = '#f00';
+ctx.rect(0, 0, 5, 5);
+ctx.clip();
+var imgdata = ctx.getImageData(0, 0, 50, 50);
+ctx.restore();
+ctx.putImageData(imgdata, 50, 0);
+_assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.unaffected.worker.js b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.unaffected.worker.js
new file mode 100644
index 0000000000..a733c6ffdf
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.unaffected.worker.js
@@ -0,0 +1,38 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.imageData.get.unaffected
+// Description:getImageData() is not affected by context state
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("getImageData() is not affected by context state");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 50, 50)
+ctx.fillStyle = '#f00';
+ctx.fillRect(50, 0, 50, 50)
+ctx.save();
+ctx.translate(50, 0);
+ctx.globalAlpha = 0.1;
+ctx.globalCompositeOperation = 'destination-atop';
+ctx.shadowColor = '#f00';
+ctx.rect(0, 0, 5, 5);
+ctx.clip();
+var imgdata = ctx.getImageData(0, 0, 50, 50);
+ctx.restore();
+ctx.putImageData(imgdata, 50, 0);
+_assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.zero.html b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.zero.html
new file mode 100644
index 0000000000..91cf5a25e2
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.zero.html
@@ -0,0 +1,29 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.imageData.get.zero</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.imageData.get.zero</h1>
+<p class="desc">getImageData() throws INDEX_SIZE_ERR if size is zero</p>
+
+
+<script>
+var t = async_test("getImageData() throws INDEX_SIZE_ERR if size is zero");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_dom("INDEX_SIZE_ERR", function() { ctx.getImageData(1, 1, 10, 0); });
+assert_throws_dom("INDEX_SIZE_ERR", function() { ctx.getImageData(1, 1, 0, 10); });
+assert_throws_dom("INDEX_SIZE_ERR", function() { ctx.getImageData(1, 1, 0, 0); });
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.zero.worker.js b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.zero.worker.js
new file mode 100644
index 0000000000..07e8f3621b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.zero.worker.js
@@ -0,0 +1,25 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.imageData.get.zero
+// Description:getImageData() throws INDEX_SIZE_ERR if size is zero
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("getImageData() throws INDEX_SIZE_ERR if size is zero");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_dom("INDEX_SIZE_ERR", function() { ctx.getImageData(1, 1, 10, 0); });
+assert_throws_dom("INDEX_SIZE_ERR", function() { ctx.getImageData(1, 1, 0, 10); });
+assert_throws_dom("INDEX_SIZE_ERR", function() { ctx.getImageData(1, 1, 0, 0); });
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.object.clamp.html b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.object.clamp.html
new file mode 100644
index 0000000000..8b1515c678
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.object.clamp.html
@@ -0,0 +1,51 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.imageData.object.clamp</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.imageData.object.clamp</h1>
+<p class="desc">ImageData.data clamps numbers to [0, 255]</p>
+
+
+<script>
+var t = async_test("ImageData.data clamps numbers to [0, 255]");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var imgdata = ctx.getImageData(0, 0, 10, 10);
+imgdata.data[0] = 100;
+imgdata.data[0] = 300;
+_assertSame(imgdata.data[0], 255, "imgdata.data[\""+(0)+"\"]", "255");
+imgdata.data[0] = 100;
+imgdata.data[0] = -100;
+_assertSame(imgdata.data[0], 0, "imgdata.data[\""+(0)+"\"]", "0");
+imgdata.data[0] = 100;
+imgdata.data[0] = 200+Math.pow(2, 32);
+_assertSame(imgdata.data[0], 255, "imgdata.data[\""+(0)+"\"]", "255");
+imgdata.data[0] = 100;
+imgdata.data[0] = -200-Math.pow(2, 32);
+_assertSame(imgdata.data[0], 0, "imgdata.data[\""+(0)+"\"]", "0");
+imgdata.data[0] = 100;
+imgdata.data[0] = Math.pow(10, 39);
+_assertSame(imgdata.data[0], 255, "imgdata.data[\""+(0)+"\"]", "255");
+imgdata.data[0] = 100;
+imgdata.data[0] = -Math.pow(10, 39);
+_assertSame(imgdata.data[0], 0, "imgdata.data[\""+(0)+"\"]", "0");
+imgdata.data[0] = 100;
+imgdata.data[0] = -Infinity;
+_assertSame(imgdata.data[0], 0, "imgdata.data[\""+(0)+"\"]", "0");
+imgdata.data[0] = 100;
+imgdata.data[0] = Infinity;
+_assertSame(imgdata.data[0], 255, "imgdata.data[\""+(0)+"\"]", "255");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.object.clamp.worker.js b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.object.clamp.worker.js
new file mode 100644
index 0000000000..0e2a33c75e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.object.clamp.worker.js
@@ -0,0 +1,47 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.imageData.object.clamp
+// Description:ImageData.data clamps numbers to [0, 255]
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("ImageData.data clamps numbers to [0, 255]");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var imgdata = ctx.getImageData(0, 0, 10, 10);
+imgdata.data[0] = 100;
+imgdata.data[0] = 300;
+_assertSame(imgdata.data[0], 255, "imgdata.data[\""+(0)+"\"]", "255");
+imgdata.data[0] = 100;
+imgdata.data[0] = -100;
+_assertSame(imgdata.data[0], 0, "imgdata.data[\""+(0)+"\"]", "0");
+imgdata.data[0] = 100;
+imgdata.data[0] = 200+Math.pow(2, 32);
+_assertSame(imgdata.data[0], 255, "imgdata.data[\""+(0)+"\"]", "255");
+imgdata.data[0] = 100;
+imgdata.data[0] = -200-Math.pow(2, 32);
+_assertSame(imgdata.data[0], 0, "imgdata.data[\""+(0)+"\"]", "0");
+imgdata.data[0] = 100;
+imgdata.data[0] = Math.pow(10, 39);
+_assertSame(imgdata.data[0], 255, "imgdata.data[\""+(0)+"\"]", "255");
+imgdata.data[0] = 100;
+imgdata.data[0] = -Math.pow(10, 39);
+_assertSame(imgdata.data[0], 0, "imgdata.data[\""+(0)+"\"]", "0");
+imgdata.data[0] = 100;
+imgdata.data[0] = -Infinity;
+_assertSame(imgdata.data[0], 0, "imgdata.data[\""+(0)+"\"]", "0");
+imgdata.data[0] = 100;
+imgdata.data[0] = Infinity;
+_assertSame(imgdata.data[0], 255, "imgdata.data[\""+(0)+"\"]", "255");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.object.nan.html b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.object.nan.html
new file mode 100644
index 0000000000..9fce409778
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.object.nan.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.imageData.object.nan</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.imageData.object.nan</h1>
+<p class="desc">ImageData.data converts NaN to 0</p>
+
+
+<script>
+var t = async_test("ImageData.data converts NaN to 0");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var imgdata = ctx.getImageData(0, 0, 10, 10);
+imgdata.data[0] = 100;
+imgdata.data[0] = NaN;
+_assertSame(imgdata.data[0], 0, "imgdata.data[\""+(0)+"\"]", "0");
+imgdata.data[0] = 100;
+imgdata.data[0] = "cheese";
+_assertSame(imgdata.data[0], 0, "imgdata.data[\""+(0)+"\"]", "0");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.object.nan.worker.js b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.object.nan.worker.js
new file mode 100644
index 0000000000..ef2eb21b37
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.object.nan.worker.js
@@ -0,0 +1,29 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.imageData.object.nan
+// Description:ImageData.data converts NaN to 0
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("ImageData.data converts NaN to 0");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var imgdata = ctx.getImageData(0, 0, 10, 10);
+imgdata.data[0] = 100;
+imgdata.data[0] = NaN;
+_assertSame(imgdata.data[0], 0, "imgdata.data[\""+(0)+"\"]", "0");
+imgdata.data[0] = 100;
+imgdata.data[0] = "cheese";
+_assertSame(imgdata.data[0], 0, "imgdata.data[\""+(0)+"\"]", "0");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.object.properties.html b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.object.properties.html
new file mode 100644
index 0000000000..05a4106b6b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.object.properties.html
@@ -0,0 +1,30 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.imageData.object.properties</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.imageData.object.properties</h1>
+<p class="desc">ImageData objects have the right properties</p>
+
+
+<script>
+var t = async_test("ImageData objects have the right properties");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var imgdata = ctx.getImageData(0, 0, 10, 10);
+_assertSame(typeof(imgdata.width), 'number', "typeof(imgdata.width)", "'number'");
+_assertSame(typeof(imgdata.height), 'number', "typeof(imgdata.height)", "'number'");
+_assertSame(typeof(imgdata.data), 'object', "typeof(imgdata.data)", "'object'");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.object.properties.worker.js b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.object.properties.worker.js
new file mode 100644
index 0000000000..42c89ef117
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.object.properties.worker.js
@@ -0,0 +1,26 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.imageData.object.properties
+// Description:ImageData objects have the right properties
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("ImageData objects have the right properties");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var imgdata = ctx.getImageData(0, 0, 10, 10);
+_assertSame(typeof(imgdata.width), 'number', "typeof(imgdata.width)", "'number'");
+_assertSame(typeof(imgdata.height), 'number', "typeof(imgdata.height)", "'number'");
+_assertSame(typeof(imgdata.data), 'object', "typeof(imgdata.data)", "'object'");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.object.readonly.html b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.object.readonly.html
new file mode 100644
index 0000000000..5fbdfc5ce0
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.object.readonly.html
@@ -0,0 +1,40 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.imageData.object.readonly</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.imageData.object.readonly</h1>
+<p class="desc">ImageData objects properties are read-only</p>
+
+
+<script>
+var t = async_test("ImageData objects properties are read-only");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var imgdata = ctx.getImageData(0, 0, 10, 10);
+var w = imgdata.width;
+var h = imgdata.height;
+var d = imgdata.data;
+imgdata.width = 123;
+imgdata.height = 123;
+imgdata.data = [100,100,100,100];
+_assertSame(imgdata.width, w, "imgdata.width", "w");
+_assertSame(imgdata.height, h, "imgdata.height", "h");
+_assertSame(imgdata.data, d, "imgdata.data", "d");
+_assertSame(imgdata.data[0], 0, "imgdata.data[\""+(0)+"\"]", "0");
+_assertSame(imgdata.data[1], 0, "imgdata.data[\""+(1)+"\"]", "0");
+_assertSame(imgdata.data[2], 0, "imgdata.data[\""+(2)+"\"]", "0");
+_assertSame(imgdata.data[3], 0, "imgdata.data[\""+(3)+"\"]", "0");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.object.readonly.worker.js b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.object.readonly.worker.js
new file mode 100644
index 0000000000..068761e2e6
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.object.readonly.worker.js
@@ -0,0 +1,36 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.imageData.object.readonly
+// Description:ImageData objects properties are read-only
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("ImageData objects properties are read-only");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var imgdata = ctx.getImageData(0, 0, 10, 10);
+var w = imgdata.width;
+var h = imgdata.height;
+var d = imgdata.data;
+imgdata.width = 123;
+imgdata.height = 123;
+imgdata.data = [100,100,100,100];
+_assertSame(imgdata.width, w, "imgdata.width", "w");
+_assertSame(imgdata.height, h, "imgdata.height", "h");
+_assertSame(imgdata.data, d, "imgdata.data", "d");
+_assertSame(imgdata.data[0], 0, "imgdata.data[\""+(0)+"\"]", "0");
+_assertSame(imgdata.data[1], 0, "imgdata.data[\""+(1)+"\"]", "0");
+_assertSame(imgdata.data[2], 0, "imgdata.data[\""+(2)+"\"]", "0");
+_assertSame(imgdata.data[3], 0, "imgdata.data[\""+(3)+"\"]", "0");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.object.round.html b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.object.round.html
new file mode 100644
index 0000000000..8b362a01c6
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.object.round.html
@@ -0,0 +1,55 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.imageData.object.round</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.imageData.object.round</h1>
+<p class="desc">ImageData.data rounds numbers with round-to-zero</p>
+
+
+<script>
+var t = async_test("ImageData.data rounds numbers with round-to-zero");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var imgdata = ctx.getImageData(0, 0, 10, 10);
+imgdata.data[0] = 0.499;
+_assertSame(imgdata.data[0], 0, "imgdata.data[\""+(0)+"\"]", "0");
+imgdata.data[0] = 0.5;
+_assertSame(imgdata.data[0], 0, "imgdata.data[\""+(0)+"\"]", "0");
+imgdata.data[0] = 0.501;
+_assertSame(imgdata.data[0], 1, "imgdata.data[\""+(0)+"\"]", "1");
+imgdata.data[0] = 1.499;
+_assertSame(imgdata.data[0], 1, "imgdata.data[\""+(0)+"\"]", "1");
+imgdata.data[0] = 1.5;
+_assertSame(imgdata.data[0], 2, "imgdata.data[\""+(0)+"\"]", "2");
+imgdata.data[0] = 1.501;
+_assertSame(imgdata.data[0], 2, "imgdata.data[\""+(0)+"\"]", "2");
+imgdata.data[0] = 2.5;
+_assertSame(imgdata.data[0], 2, "imgdata.data[\""+(0)+"\"]", "2");
+imgdata.data[0] = 3.5;
+_assertSame(imgdata.data[0], 4, "imgdata.data[\""+(0)+"\"]", "4");
+imgdata.data[0] = 252.5;
+_assertSame(imgdata.data[0], 252, "imgdata.data[\""+(0)+"\"]", "252");
+imgdata.data[0] = 253.5;
+_assertSame(imgdata.data[0], 254, "imgdata.data[\""+(0)+"\"]", "254");
+imgdata.data[0] = 254.5;
+_assertSame(imgdata.data[0], 254, "imgdata.data[\""+(0)+"\"]", "254");
+imgdata.data[0] = 256.5;
+_assertSame(imgdata.data[0], 255, "imgdata.data[\""+(0)+"\"]", "255");
+imgdata.data[0] = -0.5;
+_assertSame(imgdata.data[0], 0, "imgdata.data[\""+(0)+"\"]", "0");
+imgdata.data[0] = -1.5;
+_assertSame(imgdata.data[0], 0, "imgdata.data[\""+(0)+"\"]", "0");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.object.round.worker.js b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.object.round.worker.js
new file mode 100644
index 0000000000..4a88db9cdd
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.object.round.worker.js
@@ -0,0 +1,51 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.imageData.object.round
+// Description:ImageData.data rounds numbers with round-to-zero
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("ImageData.data rounds numbers with round-to-zero");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var imgdata = ctx.getImageData(0, 0, 10, 10);
+imgdata.data[0] = 0.499;
+_assertSame(imgdata.data[0], 0, "imgdata.data[\""+(0)+"\"]", "0");
+imgdata.data[0] = 0.5;
+_assertSame(imgdata.data[0], 0, "imgdata.data[\""+(0)+"\"]", "0");
+imgdata.data[0] = 0.501;
+_assertSame(imgdata.data[0], 1, "imgdata.data[\""+(0)+"\"]", "1");
+imgdata.data[0] = 1.499;
+_assertSame(imgdata.data[0], 1, "imgdata.data[\""+(0)+"\"]", "1");
+imgdata.data[0] = 1.5;
+_assertSame(imgdata.data[0], 2, "imgdata.data[\""+(0)+"\"]", "2");
+imgdata.data[0] = 1.501;
+_assertSame(imgdata.data[0], 2, "imgdata.data[\""+(0)+"\"]", "2");
+imgdata.data[0] = 2.5;
+_assertSame(imgdata.data[0], 2, "imgdata.data[\""+(0)+"\"]", "2");
+imgdata.data[0] = 3.5;
+_assertSame(imgdata.data[0], 4, "imgdata.data[\""+(0)+"\"]", "4");
+imgdata.data[0] = 252.5;
+_assertSame(imgdata.data[0], 252, "imgdata.data[\""+(0)+"\"]", "252");
+imgdata.data[0] = 253.5;
+_assertSame(imgdata.data[0], 254, "imgdata.data[\""+(0)+"\"]", "254");
+imgdata.data[0] = 254.5;
+_assertSame(imgdata.data[0], 254, "imgdata.data[\""+(0)+"\"]", "254");
+imgdata.data[0] = 256.5;
+_assertSame(imgdata.data[0], 255, "imgdata.data[\""+(0)+"\"]", "255");
+imgdata.data[0] = -0.5;
+_assertSame(imgdata.data[0], 0, "imgdata.data[\""+(0)+"\"]", "0");
+imgdata.data[0] = -1.5;
+_assertSame(imgdata.data[0], 0, "imgdata.data[\""+(0)+"\"]", "0");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.object.set.html b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.object.set.html
new file mode 100644
index 0000000000..95305c5bc4
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.object.set.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.imageData.object.set</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.imageData.object.set</h1>
+<p class="desc">ImageData.data can be modified</p>
+
+
+<script>
+var t = async_test("ImageData.data can be modified");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var imgdata = ctx.getImageData(0, 0, 10, 10);
+imgdata.data[0] = 100;
+_assertSame(imgdata.data[0], 100, "imgdata.data[\""+(0)+"\"]", "100");
+imgdata.data[0] = 200;
+_assertSame(imgdata.data[0], 200, "imgdata.data[\""+(0)+"\"]", "200");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.object.set.worker.js b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.object.set.worker.js
new file mode 100644
index 0000000000..fcb16ab577
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.object.set.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.imageData.object.set
+// Description:ImageData.data can be modified
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("ImageData.data can be modified");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var imgdata = ctx.getImageData(0, 0, 10, 10);
+imgdata.data[0] = 100;
+_assertSame(imgdata.data[0], 100, "imgdata.data[\""+(0)+"\"]", "100");
+imgdata.data[0] = 200;
+_assertSame(imgdata.data[0], 200, "imgdata.data[\""+(0)+"\"]", "200");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.object.string.html b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.object.string.html
new file mode 100644
index 0000000000..a7b5d578d2
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.object.string.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.imageData.object.string</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.imageData.object.string</h1>
+<p class="desc">ImageData.data converts strings to numbers with ToNumber</p>
+
+
+<script>
+var t = async_test("ImageData.data converts strings to numbers with ToNumber");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var imgdata = ctx.getImageData(0, 0, 10, 10);
+imgdata.data[0] = 100;
+imgdata.data[0] = "110";
+_assertSame(imgdata.data[0], 110, "imgdata.data[\""+(0)+"\"]", "110");
+imgdata.data[0] = 100;
+imgdata.data[0] = "0x78";
+_assertSame(imgdata.data[0], 120, "imgdata.data[\""+(0)+"\"]", "120");
+imgdata.data[0] = 100;
+imgdata.data[0] = " +130e0 ";
+_assertSame(imgdata.data[0], 130, "imgdata.data[\""+(0)+"\"]", "130");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.object.string.worker.js b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.object.string.worker.js
new file mode 100644
index 0000000000..6c2dcc8b42
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.object.string.worker.js
@@ -0,0 +1,32 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.imageData.object.string
+// Description:ImageData.data converts strings to numbers with ToNumber
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("ImageData.data converts strings to numbers with ToNumber");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var imgdata = ctx.getImageData(0, 0, 10, 10);
+imgdata.data[0] = 100;
+imgdata.data[0] = "110";
+_assertSame(imgdata.data[0], 110, "imgdata.data[\""+(0)+"\"]", "110");
+imgdata.data[0] = 100;
+imgdata.data[0] = "0x78";
+_assertSame(imgdata.data[0], 120, "imgdata.data[\""+(0)+"\"]", "120");
+imgdata.data[0] = 100;
+imgdata.data[0] = " +130e0 ";
+_assertSame(imgdata.data[0], 130, "imgdata.data[\""+(0)+"\"]", "130");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.object.undefined.html b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.object.undefined.html
new file mode 100644
index 0000000000..a2533a52e6
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.object.undefined.html
@@ -0,0 +1,30 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.imageData.object.undefined</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.imageData.object.undefined</h1>
+<p class="desc">ImageData.data converts undefined to 0</p>
+
+
+<script>
+var t = async_test("ImageData.data converts undefined to 0");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var imgdata = ctx.getImageData(0, 0, 10, 10);
+imgdata.data[0] = 100;
+imgdata.data[0] = undefined;
+_assertSame(imgdata.data[0], 0, "imgdata.data[\""+(0)+"\"]", "0");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.object.undefined.worker.js b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.object.undefined.worker.js
new file mode 100644
index 0000000000..f6b62993f6
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.object.undefined.worker.js
@@ -0,0 +1,26 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.imageData.object.undefined
+// Description:ImageData.data converts undefined to 0
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("ImageData.data converts undefined to 0");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var imgdata = ctx.getImageData(0, 0, 10, 10);
+imgdata.data[0] = 100;
+imgdata.data[0] = undefined;
+_assertSame(imgdata.data[0], 0, "imgdata.data[\""+(0)+"\"]", "0");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.alpha.html b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.alpha.html
new file mode 100644
index 0000000000..ecda85bd12
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.alpha.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.imageData.put.alpha</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.imageData.put.alpha</h1>
+<p class="desc">putImageData() puts non-solid image data correctly</p>
+
+
+<script>
+var t = async_test("putImageData() puts non-solid image data correctly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = 'rgba(0, 255, 0, 0.25)';
+ctx.fillRect(0, 0, 100, 50)
+var imgdata = ctx.getImageData(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50)
+ctx.putImageData(imgdata, 0, 0);
+_assertPixelApprox(canvas, 50,25, 0,255,0,64, 2);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.alpha.worker.js b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.alpha.worker.js
new file mode 100644
index 0000000000..3349c69286
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.alpha.worker.js
@@ -0,0 +1,29 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.imageData.put.alpha
+// Description:putImageData() puts non-solid image data correctly
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("putImageData() puts non-solid image data correctly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = 'rgba(0, 255, 0, 0.25)';
+ctx.fillRect(0, 0, 100, 50)
+var imgdata = ctx.getImageData(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50)
+ctx.putImageData(imgdata, 0, 0);
+_assertPixelApprox(canvas, 50,25, 0,255,0,64, 2);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.basic.html b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.basic.html
new file mode 100644
index 0000000000..d140cc39ab
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.basic.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.imageData.put.basic</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.imageData.put.basic</h1>
+<p class="desc">putImageData() puts image data from getImageData() onto the canvas</p>
+
+
+<script>
+var t = async_test("putImageData() puts image data from getImageData() onto the canvas");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50)
+var imgdata = ctx.getImageData(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50)
+ctx.putImageData(imgdata, 0, 0);
+_assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.basic.worker.js b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.basic.worker.js
new file mode 100644
index 0000000000..276fea2d12
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.basic.worker.js
@@ -0,0 +1,29 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.imageData.put.basic
+// Description:putImageData() puts image data from getImageData() onto the canvas
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("putImageData() puts image data from getImageData() onto the canvas");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50)
+var imgdata = ctx.getImageData(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50)
+ctx.putImageData(imgdata, 0, 0);
+_assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.clip.html b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.clip.html
new file mode 100644
index 0000000000..121a45fae8
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.clip.html
@@ -0,0 +1,37 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.imageData.put.clip</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.imageData.put.clip</h1>
+<p class="desc">putImageData() is not affected by clipping regions</p>
+
+
+<script>
+var t = async_test("putImageData() is not affected by clipping regions");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50)
+var imgdata = ctx.getImageData(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50)
+ctx.beginPath();
+ctx.rect(0, 0, 50, 50);
+ctx.clip();
+ctx.putImageData(imgdata, 0, 0);
+_assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.clip.worker.js b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.clip.worker.js
new file mode 100644
index 0000000000..9188b3cf88
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.clip.worker.js
@@ -0,0 +1,33 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.imageData.put.clip
+// Description:putImageData() is not affected by clipping regions
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("putImageData() is not affected by clipping regions");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50)
+var imgdata = ctx.getImageData(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50)
+ctx.beginPath();
+ctx.rect(0, 0, 50, 50);
+ctx.clip();
+ctx.putImageData(imgdata, 0, 0);
+_assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.created.html b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.created.html
new file mode 100644
index 0000000000..7ade3b1deb
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.created.html
@@ -0,0 +1,37 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.imageData.put.created</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.imageData.put.created</h1>
+<p class="desc">putImageData() puts image data from createImageData() onto the canvas</p>
+
+
+<script>
+var t = async_test("putImageData() puts image data from createImageData() onto the canvas");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var imgdata = ctx.createImageData(100, 50);
+for (var i = 0; i < imgdata.data.length; i += 4) {
+ imgdata.data[i] = 0;
+ imgdata.data[i+1] = 255;
+ imgdata.data[i+2] = 0;
+ imgdata.data[i+3] = 255;
+}
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50)
+ctx.putImageData(imgdata, 0, 0);
+_assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.created.worker.js b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.created.worker.js
new file mode 100644
index 0000000000..fd6b5ec8e0
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.created.worker.js
@@ -0,0 +1,33 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.imageData.put.created
+// Description:putImageData() puts image data from createImageData() onto the canvas
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("putImageData() puts image data from createImageData() onto the canvas");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var imgdata = ctx.createImageData(100, 50);
+for (var i = 0; i < imgdata.data.length; i += 4) {
+ imgdata.data[i] = 0;
+ imgdata.data[i+1] = 255;
+ imgdata.data[i+2] = 0;
+ imgdata.data[i+3] = 255;
+}
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50)
+ctx.putImageData(imgdata, 0, 0);
+_assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.cross.html b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.cross.html
new file mode 100644
index 0000000000..af90d71991
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.cross.html
@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.imageData.put.cross</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.imageData.put.cross</h1>
+<p class="desc">putImageData() accepts image data got from a different canvas</p>
+
+
+<script>
+var t = async_test("putImageData() accepts image data got from a different canvas");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+var ctx2 = offscreenCanvas2.getContext('2d');
+ctx2.fillStyle = '#0f0';
+ctx2.fillRect(0, 0, 100, 50)
+var imgdata = ctx2.getImageData(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50)
+ctx.putImageData(imgdata, 0, 0);
+_assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.cross.worker.js b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.cross.worker.js
new file mode 100644
index 0000000000..bdeaa35245
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.cross.worker.js
@@ -0,0 +1,31 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.imageData.put.cross
+// Description:putImageData() accepts image data got from a different canvas
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("putImageData() accepts image data got from a different canvas");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+var ctx2 = offscreenCanvas2.getContext('2d');
+ctx2.fillStyle = '#0f0';
+ctx2.fillRect(0, 0, 100, 50)
+var imgdata = ctx2.getImageData(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50)
+ctx.putImageData(imgdata, 0, 0);
+_assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.dirty.negative.html b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.dirty.negative.html
new file mode 100644
index 0000000000..e2fbcb2702
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.dirty.negative.html
@@ -0,0 +1,41 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.imageData.put.dirty.negative</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.imageData.put.dirty.negative</h1>
+<p class="desc">putImageData() handles negative-sized dirty rectangles correctly</p>
+
+
+<script>
+var t = async_test("putImageData() handles negative-sized dirty rectangles correctly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50)
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 20, 20)
+var imgdata = ctx.getImageData(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50)
+ctx.fillStyle = '#f00';
+ctx.fillRect(40, 20, 20, 20)
+ctx.putImageData(imgdata, 40, 20, 20, 20, -20, -20);
+_assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 35,25, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 65,25, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 50,15, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 50,45, 0,255,0,255, 2);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.dirty.negative.worker.js b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.dirty.negative.worker.js
new file mode 100644
index 0000000000..5eec264c75
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.dirty.negative.worker.js
@@ -0,0 +1,37 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.imageData.put.dirty.negative
+// Description:putImageData() handles negative-sized dirty rectangles correctly
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("putImageData() handles negative-sized dirty rectangles correctly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50)
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 20, 20)
+var imgdata = ctx.getImageData(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50)
+ctx.fillStyle = '#f00';
+ctx.fillRect(40, 20, 20, 20)
+ctx.putImageData(imgdata, 40, 20, 20, 20, -20, -20);
+_assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 35,25, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 65,25, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 50,15, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 50,45, 0,255,0,255, 2);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.dirty.outside.html b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.dirty.outside.html
new file mode 100644
index 0000000000..aaf48a762b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.dirty.outside.html
@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.imageData.put.dirty.outside</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.imageData.put.dirty.outside</h1>
+<p class="desc">putImageData() handles dirty rectangles outside the canvas correctly</p>
+
+
+<script>
+var t = async_test("putImageData() handles dirty rectangles outside the canvas correctly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50)
+var imgdata = ctx.getImageData(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50)
+ctx.putImageData(imgdata, 100, 20, 20, 20, -20, -20);
+ctx.putImageData(imgdata, 200, 200, 0, 0, 100, 50);
+ctx.putImageData(imgdata, 40, 20, -30, -20, 30, 20);
+ctx.putImageData(imgdata, -30, 20, 0, 0, 30, 20);
+_assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 98,15, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 98,25, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 98,45, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 1,5, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 1,25, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 1,45, 0,255,0,255, 2);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.dirty.outside.worker.js b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.dirty.outside.worker.js
new file mode 100644
index 0000000000..9f537135da
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.dirty.outside.worker.js
@@ -0,0 +1,38 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.imageData.put.dirty.outside
+// Description:putImageData() handles dirty rectangles outside the canvas correctly
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("putImageData() handles dirty rectangles outside the canvas correctly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50)
+var imgdata = ctx.getImageData(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50)
+ctx.putImageData(imgdata, 100, 20, 20, 20, -20, -20);
+ctx.putImageData(imgdata, 200, 200, 0, 0, 100, 50);
+ctx.putImageData(imgdata, 40, 20, -30, -20, 30, 20);
+ctx.putImageData(imgdata, -30, 20, 0, 0, 30, 20);
+_assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 98,15, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 98,25, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 98,45, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 1,5, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 1,25, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 1,45, 0,255,0,255, 2);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.dirty.rect1.html b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.dirty.rect1.html
new file mode 100644
index 0000000000..e973eb6ca4
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.dirty.rect1.html
@@ -0,0 +1,41 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.imageData.put.dirty.rect1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.imageData.put.dirty.rect1</h1>
+<p class="desc">putImageData() only modifies areas inside the dirty rectangle, using width and height</p>
+
+
+<script>
+var t = async_test("putImageData() only modifies areas inside the dirty rectangle, using width and height");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50)
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 20, 20)
+var imgdata = ctx.getImageData(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50)
+ctx.fillStyle = '#f00';
+ctx.fillRect(40, 20, 20, 20)
+ctx.putImageData(imgdata, 40, 20, 0, 0, 20, 20);
+_assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 35,25, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 65,25, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 50,15, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 50,45, 0,255,0,255, 2);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.dirty.rect1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.dirty.rect1.worker.js
new file mode 100644
index 0000000000..fdbe6561ce
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.dirty.rect1.worker.js
@@ -0,0 +1,37 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.imageData.put.dirty.rect1
+// Description:putImageData() only modifies areas inside the dirty rectangle, using width and height
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("putImageData() only modifies areas inside the dirty rectangle, using width and height");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50)
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 20, 20)
+var imgdata = ctx.getImageData(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50)
+ctx.fillStyle = '#f00';
+ctx.fillRect(40, 20, 20, 20)
+ctx.putImageData(imgdata, 40, 20, 0, 0, 20, 20);
+_assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 35,25, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 65,25, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 50,15, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 50,45, 0,255,0,255, 2);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.dirty.rect2.html b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.dirty.rect2.html
new file mode 100644
index 0000000000..9b275429e6
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.dirty.rect2.html
@@ -0,0 +1,41 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.imageData.put.dirty.rect2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.imageData.put.dirty.rect2</h1>
+<p class="desc">putImageData() only modifies areas inside the dirty rectangle, using x and y</p>
+
+
+<script>
+var t = async_test("putImageData() only modifies areas inside the dirty rectangle, using x and y");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50)
+ctx.fillStyle = '#0f0';
+ctx.fillRect(60, 30, 20, 20)
+var imgdata = ctx.getImageData(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50)
+ctx.fillStyle = '#f00';
+ctx.fillRect(40, 20, 20, 20)
+ctx.putImageData(imgdata, -20, -10, 60, 30, 20, 20);
+_assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 35,25, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 65,25, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 50,15, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 50,45, 0,255,0,255, 2);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.dirty.rect2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.dirty.rect2.worker.js
new file mode 100644
index 0000000000..3578ceec25
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.dirty.rect2.worker.js
@@ -0,0 +1,37 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.imageData.put.dirty.rect2
+// Description:putImageData() only modifies areas inside the dirty rectangle, using x and y
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("putImageData() only modifies areas inside the dirty rectangle, using x and y");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50)
+ctx.fillStyle = '#0f0';
+ctx.fillRect(60, 30, 20, 20)
+var imgdata = ctx.getImageData(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50)
+ctx.fillStyle = '#f00';
+ctx.fillRect(40, 20, 20, 20)
+ctx.putImageData(imgdata, -20, -10, 60, 30, 20, 20);
+_assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 35,25, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 65,25, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 50,15, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 50,45, 0,255,0,255, 2);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.dirty.zero.html b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.dirty.zero.html
new file mode 100644
index 0000000000..c1b6735d25
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.dirty.zero.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.imageData.put.dirty.zero</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.imageData.put.dirty.zero</h1>
+<p class="desc">putImageData() with zero-sized dirty rectangle puts nothing</p>
+
+
+<script>
+var t = async_test("putImageData() with zero-sized dirty rectangle puts nothing");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50)
+var imgdata = ctx.getImageData(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50)
+ctx.putImageData(imgdata, 0, 0, 0, 0, 0, 0);
+_assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.dirty.zero.worker.js b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.dirty.zero.worker.js
new file mode 100644
index 0000000000..db09379c62
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.dirty.zero.worker.js
@@ -0,0 +1,29 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.imageData.put.dirty.zero
+// Description:putImageData() with zero-sized dirty rectangle puts nothing
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("putImageData() with zero-sized dirty rectangle puts nothing");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50)
+var imgdata = ctx.getImageData(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50)
+ctx.putImageData(imgdata, 0, 0, 0, 0, 0, 0);
+_assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.modified.html b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.modified.html
new file mode 100644
index 0000000000..543d9ff293
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.modified.html
@@ -0,0 +1,38 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.imageData.put.modified</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.imageData.put.modified</h1>
+<p class="desc">putImageData() puts modified image data correctly</p>
+
+
+<script>
+var t = async_test("putImageData() puts modified image data correctly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50)
+ctx.fillStyle = '#f00';
+ctx.fillRect(45, 20, 10, 10)
+var imgdata = ctx.getImageData(45, 20, 10, 10);
+for (var i = 0, len = imgdata.width*imgdata.height*4; i < len; i += 4)
+{
+ imgdata.data[i] = 0;
+ imgdata.data[i+1] = 255;
+}
+ctx.putImageData(imgdata, 45, 20);
+_assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.modified.worker.js b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.modified.worker.js
new file mode 100644
index 0000000000..b238d56cf9
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.modified.worker.js
@@ -0,0 +1,34 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.imageData.put.modified
+// Description:putImageData() puts modified image data correctly
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("putImageData() puts modified image data correctly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50)
+ctx.fillStyle = '#f00';
+ctx.fillRect(45, 20, 10, 10)
+var imgdata = ctx.getImageData(45, 20, 10, 10);
+for (var i = 0, len = imgdata.width*imgdata.height*4; i < len; i += 4)
+{
+ imgdata.data[i] = 0;
+ imgdata.data[i+1] = 255;
+}
+ctx.putImageData(imgdata, 45, 20);
+_assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.nonfinite.html b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.nonfinite.html
new file mode 100644
index 0000000000..6590f761ad
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.nonfinite.html
@@ -0,0 +1,109 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.imageData.put.nonfinite</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.imageData.put.nonfinite</h1>
+<p class="desc">putImageData() throws TypeError if arguments are not finite</p>
+
+
+<script>
+var t = async_test("putImageData() throws TypeError if arguments are not finite");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var imgdata = ctx.getImageData(0, 0, 10, 10);
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, -Infinity, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, NaN, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, -Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, NaN); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, 10, 10, 10, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, -Infinity, 10, 10, 10, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, NaN, 10, 10, 10, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, Infinity, 10, 10, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, -Infinity, 10, 10, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, NaN, 10, 10, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, 10, Infinity, 10, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, 10, -Infinity, 10, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, 10, NaN, 10, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, 10, 10, Infinity, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, 10, 10, -Infinity, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, 10, 10, NaN, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, 10, 10, 10, Infinity, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, 10, 10, 10, -Infinity, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, 10, 10, 10, NaN, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, 10, 10, 10, 10, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, 10, 10, 10, 10, -Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, 10, 10, 10, 10, NaN); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, Infinity, 10, 10, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, Infinity, Infinity, 10, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, Infinity, Infinity, Infinity, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, Infinity, Infinity, Infinity, Infinity, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, Infinity, Infinity, Infinity, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, Infinity, Infinity, Infinity, 10, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, Infinity, Infinity, 10, Infinity, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, Infinity, Infinity, 10, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, Infinity, Infinity, 10, 10, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, Infinity, 10, Infinity, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, Infinity, 10, Infinity, Infinity, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, Infinity, 10, Infinity, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, Infinity, 10, Infinity, 10, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, Infinity, 10, 10, Infinity, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, Infinity, 10, 10, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, Infinity, 10, 10, 10, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, 10, Infinity, 10, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, 10, Infinity, Infinity, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, 10, Infinity, Infinity, Infinity, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, 10, Infinity, Infinity, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, 10, Infinity, Infinity, 10, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, 10, Infinity, 10, Infinity, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, 10, Infinity, 10, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, 10, Infinity, 10, 10, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, 10, 10, Infinity, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, 10, 10, Infinity, Infinity, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, 10, 10, Infinity, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, 10, 10, Infinity, 10, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, 10, 10, 10, Infinity, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, 10, 10, 10, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, 10, 10, 10, 10, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, Infinity, Infinity, 10, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, Infinity, Infinity, Infinity, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, Infinity, Infinity, Infinity, Infinity, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, Infinity, Infinity, Infinity, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, Infinity, Infinity, Infinity, 10, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, Infinity, Infinity, 10, Infinity, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, Infinity, Infinity, 10, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, Infinity, Infinity, 10, 10, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, Infinity, 10, Infinity, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, Infinity, 10, Infinity, Infinity, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, Infinity, 10, Infinity, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, Infinity, 10, Infinity, 10, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, Infinity, 10, 10, Infinity, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, Infinity, 10, 10, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, Infinity, 10, 10, 10, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, 10, Infinity, Infinity, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, 10, Infinity, Infinity, Infinity, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, 10, Infinity, Infinity, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, 10, Infinity, Infinity, 10, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, 10, Infinity, 10, Infinity, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, 10, Infinity, 10, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, 10, Infinity, 10, 10, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, 10, 10, Infinity, Infinity, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, 10, 10, Infinity, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, 10, 10, Infinity, 10, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, 10, 10, 10, Infinity, Infinity); });
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.nonfinite.worker.js b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.nonfinite.worker.js
new file mode 100644
index 0000000000..04298fa99f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.nonfinite.worker.js
@@ -0,0 +1,105 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.imageData.put.nonfinite
+// Description:putImageData() throws TypeError if arguments are not finite
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("putImageData() throws TypeError if arguments are not finite");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var imgdata = ctx.getImageData(0, 0, 10, 10);
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, -Infinity, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, NaN, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, -Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, NaN); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, 10, 10, 10, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, -Infinity, 10, 10, 10, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, NaN, 10, 10, 10, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, Infinity, 10, 10, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, -Infinity, 10, 10, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, NaN, 10, 10, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, 10, Infinity, 10, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, 10, -Infinity, 10, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, 10, NaN, 10, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, 10, 10, Infinity, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, 10, 10, -Infinity, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, 10, 10, NaN, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, 10, 10, 10, Infinity, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, 10, 10, 10, -Infinity, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, 10, 10, 10, NaN, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, 10, 10, 10, 10, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, 10, 10, 10, 10, -Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, 10, 10, 10, 10, NaN); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, Infinity, 10, 10, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, Infinity, Infinity, 10, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, Infinity, Infinity, Infinity, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, Infinity, Infinity, Infinity, Infinity, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, Infinity, Infinity, Infinity, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, Infinity, Infinity, Infinity, 10, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, Infinity, Infinity, 10, Infinity, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, Infinity, Infinity, 10, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, Infinity, Infinity, 10, 10, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, Infinity, 10, Infinity, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, Infinity, 10, Infinity, Infinity, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, Infinity, 10, Infinity, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, Infinity, 10, Infinity, 10, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, Infinity, 10, 10, Infinity, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, Infinity, 10, 10, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, Infinity, 10, 10, 10, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, 10, Infinity, 10, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, 10, Infinity, Infinity, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, 10, Infinity, Infinity, Infinity, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, 10, Infinity, Infinity, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, 10, Infinity, Infinity, 10, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, 10, Infinity, 10, Infinity, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, 10, Infinity, 10, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, 10, Infinity, 10, 10, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, 10, 10, Infinity, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, 10, 10, Infinity, Infinity, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, 10, 10, Infinity, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, 10, 10, Infinity, 10, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, 10, 10, 10, Infinity, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, 10, 10, 10, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, Infinity, 10, 10, 10, 10, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, Infinity, Infinity, 10, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, Infinity, Infinity, Infinity, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, Infinity, Infinity, Infinity, Infinity, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, Infinity, Infinity, Infinity, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, Infinity, Infinity, Infinity, 10, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, Infinity, Infinity, 10, Infinity, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, Infinity, Infinity, 10, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, Infinity, Infinity, 10, 10, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, Infinity, 10, Infinity, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, Infinity, 10, Infinity, Infinity, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, Infinity, 10, Infinity, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, Infinity, 10, Infinity, 10, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, Infinity, 10, 10, Infinity, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, Infinity, 10, 10, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, Infinity, 10, 10, 10, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, 10, Infinity, Infinity, 10, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, 10, Infinity, Infinity, Infinity, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, 10, Infinity, Infinity, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, 10, Infinity, Infinity, 10, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, 10, Infinity, 10, Infinity, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, 10, Infinity, 10, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, 10, Infinity, 10, 10, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, 10, 10, Infinity, Infinity, 10); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, 10, 10, Infinity, Infinity, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, 10, 10, Infinity, 10, Infinity); });
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 10, 10, 10, 10, Infinity, Infinity); });
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.null.html b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.null.html
new file mode 100644
index 0000000000..3a51c9719c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.null.html
@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.imageData.put.null</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.imageData.put.null</h1>
+<p class="desc">putImageData() with null imagedata throws TypeError</p>
+
+
+<script>
+var t = async_test("putImageData() with null imagedata throws TypeError");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_js(TypeError, function() { ctx.putImageData(null, 0, 0); });
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.null.worker.js b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.null.worker.js
new file mode 100644
index 0000000000..0b5b746ba0
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.null.worker.js
@@ -0,0 +1,23 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.imageData.put.null
+// Description:putImageData() with null imagedata throws TypeError
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("putImageData() with null imagedata throws TypeError");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_js(TypeError, function() { ctx.putImageData(null, 0, 0); });
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.path.html b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.path.html
new file mode 100644
index 0000000000..53e3ac4fce
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.path.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.imageData.put.path</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.imageData.put.path</h1>
+<p class="desc">putImageData() does not affect the current path</p>
+
+
+<script>
+var t = async_test("putImageData() does not affect the current path");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50)
+ctx.rect(0, 0, 100, 50);
+var imgdata = ctx.getImageData(0, 0, 100, 50);
+ctx.putImageData(imgdata, 0, 0);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+_assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.path.worker.js b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.path.worker.js
new file mode 100644
index 0000000000..81bd03eb4f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.path.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.imageData.put.path
+// Description:putImageData() does not affect the current path
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("putImageData() does not affect the current path");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50)
+ctx.rect(0, 0, 100, 50);
+var imgdata = ctx.getImageData(0, 0, 100, 50);
+ctx.putImageData(imgdata, 0, 0);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+_assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.unaffected.html b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.unaffected.html
new file mode 100644
index 0000000000..8d94f9bbf6
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.unaffected.html
@@ -0,0 +1,39 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.imageData.put.unaffected</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.imageData.put.unaffected</h1>
+<p class="desc">putImageData() is not affected by context state</p>
+
+
+<script>
+var t = async_test("putImageData() is not affected by context state");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50)
+var imgdata = ctx.getImageData(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50)
+ctx.globalAlpha = 0.1;
+ctx.globalCompositeOperation = 'destination-atop';
+ctx.shadowColor = '#f00';
+ctx.shadowBlur = 1;
+ctx.translate(100, 50);
+ctx.scale(0.1, 0.1);
+ctx.putImageData(imgdata, 0, 0);
+_assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.unaffected.worker.js b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.unaffected.worker.js
new file mode 100644
index 0000000000..9b931717f0
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.unaffected.worker.js
@@ -0,0 +1,35 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.imageData.put.unaffected
+// Description:putImageData() is not affected by context state
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("putImageData() is not affected by context state");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50)
+var imgdata = ctx.getImageData(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50)
+ctx.globalAlpha = 0.1;
+ctx.globalCompositeOperation = 'destination-atop';
+ctx.shadowColor = '#f00';
+ctx.shadowBlur = 1;
+ctx.translate(100, 50);
+ctx.scale(0.1, 0.1);
+ctx.putImageData(imgdata, 0, 0);
+_assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.unchanged.html b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.unchanged.html
new file mode 100644
index 0000000000..b3aff6f49c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.unchanged.html
@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.imageData.put.unchanged</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.imageData.put.unchanged</h1>
+<p class="desc">putImageData(getImageData(...), ...) has no effect</p>
+
+
+<script>
+var t = async_test("putImageData(getImageData(...), ...) has no effect");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var i = 0;
+for (var y = 0; y < 16; ++y) {
+ for (var x = 0; x < 16; ++x, ++i) {
+ ctx.fillStyle = 'rgba(' + i + ',' + (Math.floor(i*1.5) % 256) + ',' + (Math.floor(i*23.3) % 256) + ',' + (i/256) + ')';
+ ctx.fillRect(x, y, 1, 1);
+ }
+}
+var imgdata1 = ctx.getImageData(0.1, 0.2, 15.8, 15.9);
+var olddata = [];
+for (var i = 0; i < imgdata1.data.length; ++i)
+ olddata[i] = imgdata1.data[i];
+ctx.putImageData(imgdata1, 0.1, 0.2);
+var imgdata2 = ctx.getImageData(0.1, 0.2, 15.8, 15.9);
+for (var i = 0; i < imgdata2.data.length; ++i) {
+ _assertSame(olddata[i], imgdata2.data[i], "olddata[\""+(i)+"\"]", "imgdata2.data[\""+(i)+"\"]");
+}
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.unchanged.worker.js b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.unchanged.worker.js
new file mode 100644
index 0000000000..231ba3860d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.unchanged.worker.js
@@ -0,0 +1,38 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.imageData.put.unchanged
+// Description:putImageData(getImageData(...), ...) has no effect
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("putImageData(getImageData(...), ...) has no effect");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var i = 0;
+for (var y = 0; y < 16; ++y) {
+ for (var x = 0; x < 16; ++x, ++i) {
+ ctx.fillStyle = 'rgba(' + i + ',' + (Math.floor(i*1.5) % 256) + ',' + (Math.floor(i*23.3) % 256) + ',' + (i/256) + ')';
+ ctx.fillRect(x, y, 1, 1);
+ }
+}
+var imgdata1 = ctx.getImageData(0.1, 0.2, 15.8, 15.9);
+var olddata = [];
+for (var i = 0; i < imgdata1.data.length; ++i)
+ olddata[i] = imgdata1.data[i];
+ctx.putImageData(imgdata1, 0.1, 0.2);
+var imgdata2 = ctx.getImageData(0.1, 0.2, 15.8, 15.9);
+for (var i = 0; i < imgdata2.data.length; ++i) {
+ _assertSame(olddata[i], imgdata2.data[i], "olddata[\""+(i)+"\"]", "imgdata2.data[\""+(i)+"\"]");
+}
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.wrongtype.html b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.wrongtype.html
new file mode 100644
index 0000000000..8e8ca53a9a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.wrongtype.html
@@ -0,0 +1,30 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.imageData.put.wrongtype</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.imageData.put.wrongtype</h1>
+<p class="desc">putImageData() does not accept non-ImageData objects</p>
+
+
+<script>
+var t = async_test("putImageData() does not accept non-ImageData objects");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var imgdata = { width: 1, height: 1, data: [255, 0, 0, 255] };
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 0, 0); });
+assert_throws_js(TypeError, function() { ctx.putImageData("cheese", 0, 0); });
+assert_throws_js(TypeError, function() { ctx.putImageData(42, 0, 0); });
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.wrongtype.worker.js b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.wrongtype.worker.js
new file mode 100644
index 0000000000..9c58133ac9
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.put.wrongtype.worker.js
@@ -0,0 +1,26 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.imageData.put.wrongtype
+// Description:putImageData() does not accept non-ImageData objects
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("putImageData() does not accept non-ImageData objects");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var imgdata = { width: 1, height: 1, data: [255, 0, 0, 255] };
+assert_throws_js(TypeError, function() { ctx.putImageData(imgdata, 0, 0); });
+assert_throws_js(TypeError, function() { ctx.putImageData("cheese", 0, 0); });
+assert_throws_js(TypeError, function() { ctx.putImageData(42, 0, 0); });
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/set-proprietary-font-names-001-crash.html b/testing/web-platform/tests/html/canvas/offscreen/set-proprietary-font-names-001-crash.html
new file mode 100644
index 0000000000..dfa661655e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/set-proprietary-font-names-001-crash.html
@@ -0,0 +1,13 @@
+<!DOCTYPE>
+<title>Setting font of offscreen</title>
+<script src="/css/css-fonts/support/font-family-keywords.js"></script>
+<link rel="help" href="https://drafts.csswg.org/css-fonts-4/#font-family-prop">
+<link rel="help" href="https://bugs.chromium.org/p/chromium/issues/detail?id=1056386">
+<script>
+ let ctx = (new OffscreenCanvas(1024, 50)).getContext('2d');
+ function setFont(keyword) { ctx.font = `12px ${keyword}` };
+ kNonGenericFontFamilyKeywords.forEach(setFont);
+ kGenericFontFamilyKeywords.forEach(keyword => {
+ setFont(`-webkit-${keyword}`);
+ });
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.alpha.1.html b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.alpha.1.html
new file mode 100644
index 0000000000..cf887b62a2
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.alpha.1.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.shadow.alpha.1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.shadow.alpha.1</h1>
+<p class="desc">Shadow color alpha components are used</p>
+
+
+<script>
+var t = async_test("Shadow color alpha components are used");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.shadowColor = 'rgba(255, 0, 0, 0.01)';
+ctx.shadowOffsetY = 50;
+ctx.fillRect(0, -50, 100, 50);
+_assertPixelApprox(canvas, 50,25, 0,255,0,255, 4);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.alpha.1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.alpha.1.worker.js
new file mode 100644
index 0000000000..7bcf74463c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.alpha.1.worker.js
@@ -0,0 +1,28 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.shadow.alpha.1
+// Description:Shadow color alpha components are used
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Shadow color alpha components are used");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.shadowColor = 'rgba(255, 0, 0, 0.01)';
+ctx.shadowOffsetY = 50;
+ctx.fillRect(0, -50, 100, 50);
+_assertPixelApprox(canvas, 50,25, 0,255,0,255, 4);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.alpha.2.html b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.alpha.2.html
new file mode 100644
index 0000000000..cb03866bc3
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.alpha.2.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.shadow.alpha.2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.shadow.alpha.2</h1>
+<p class="desc">Shadow color alpha components are used</p>
+
+
+<script>
+var t = async_test("Shadow color alpha components are used");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.shadowColor = 'rgba(0, 0, 255, 0.5)';
+ctx.shadowOffsetY = 50;
+ctx.fillRect(0, -50, 100, 50);
+_assertPixelApprox(canvas, 50,25, 127,0,127,255, 2);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.alpha.2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.alpha.2.worker.js
new file mode 100644
index 0000000000..8f4b98143b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.alpha.2.worker.js
@@ -0,0 +1,28 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.shadow.alpha.2
+// Description:Shadow color alpha components are used
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Shadow color alpha components are used");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.shadowColor = 'rgba(0, 0, 255, 0.5)';
+ctx.shadowOffsetY = 50;
+ctx.fillRect(0, -50, 100, 50);
+_assertPixelApprox(canvas, 50,25, 127,0,127,255, 2);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.alpha.3.html b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.alpha.3.html
new file mode 100644
index 0000000000..efc9fca97e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.alpha.3.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.shadow.alpha.3</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.shadow.alpha.3</h1>
+<p class="desc">Shadows are affected by globalAlpha</p>
+
+
+<script>
+var t = async_test("Shadows are affected by globalAlpha");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#f00'; // (work around broken Firefox globalAlpha caching)
+ctx.shadowColor = '#00f';
+ctx.shadowOffsetY = 50;
+ctx.globalAlpha = 0.5;
+ctx.fillRect(0, -50, 100, 50);
+_assertPixelApprox(canvas, 50,25, 127,0,127,255, 2);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.alpha.3.worker.js b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.alpha.3.worker.js
new file mode 100644
index 0000000000..ddaae242d9
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.alpha.3.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.shadow.alpha.3
+// Description:Shadows are affected by globalAlpha
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Shadows are affected by globalAlpha");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#f00'; // (work around broken Firefox globalAlpha caching)
+ctx.shadowColor = '#00f';
+ctx.shadowOffsetY = 50;
+ctx.globalAlpha = 0.5;
+ctx.fillRect(0, -50, 100, 50);
+_assertPixelApprox(canvas, 50,25, 127,0,127,255, 2);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.alpha.4.html b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.alpha.4.html
new file mode 100644
index 0000000000..295b61269c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.alpha.4.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.shadow.alpha.4</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.shadow.alpha.4</h1>
+<p class="desc">Shadows with alpha components are correctly affected by globalAlpha</p>
+
+
+<script>
+var t = async_test("Shadows with alpha components are correctly affected by globalAlpha");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#f00'; // (work around broken Firefox globalAlpha caching)
+ctx.shadowColor = 'rgba(0, 0, 255, 0.707)';
+ctx.shadowOffsetY = 50;
+ctx.globalAlpha = 0.707;
+ctx.fillRect(0, -50, 100, 50);
+_assertPixelApprox(canvas, 50,25, 127,0,127,255, 2);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.alpha.4.worker.js b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.alpha.4.worker.js
new file mode 100644
index 0000000000..16defd9094
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.alpha.4.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.shadow.alpha.4
+// Description:Shadows with alpha components are correctly affected by globalAlpha
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Shadows with alpha components are correctly affected by globalAlpha");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#f00'; // (work around broken Firefox globalAlpha caching)
+ctx.shadowColor = 'rgba(0, 0, 255, 0.707)';
+ctx.shadowOffsetY = 50;
+ctx.globalAlpha = 0.707;
+ctx.fillRect(0, -50, 100, 50);
+_assertPixelApprox(canvas, 50,25, 127,0,127,255, 2);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.alpha.5.html b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.alpha.5.html
new file mode 100644
index 0000000000..3b1089d7d7
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.alpha.5.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.shadow.alpha.5</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.shadow.alpha.5</h1>
+<p class="desc">Shadows of shapes with alpha components are drawn correctly</p>
+
+
+<script>
+var t = async_test("Shadows of shapes with alpha components are drawn correctly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = 'rgba(64, 0, 0, 0.5)';
+ctx.shadowColor = '#00f';
+ctx.shadowOffsetY = 50;
+ctx.fillRect(0, -50, 100, 50);
+_assertPixelApprox(canvas, 50,25, 127,0,127,255, 2);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.alpha.5.worker.js b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.alpha.5.worker.js
new file mode 100644
index 0000000000..5437c65ec1
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.alpha.5.worker.js
@@ -0,0 +1,29 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.shadow.alpha.5
+// Description:Shadows of shapes with alpha components are drawn correctly
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Shadows of shapes with alpha components are drawn correctly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = 'rgba(64, 0, 0, 0.5)';
+ctx.shadowColor = '#00f';
+ctx.shadowOffsetY = 50;
+ctx.fillRect(0, -50, 100, 50);
+_assertPixelApprox(canvas, 50,25, 127,0,127,255, 2);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.attributes.shadowBlur.initial.html b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.attributes.shadowBlur.initial.html
new file mode 100644
index 0000000000..e6c4c2fda8
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.attributes.shadowBlur.initial.html
@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.shadow.attributes.shadowBlur.initial</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.shadow.attributes.shadowBlur.initial</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertSame(ctx.shadowBlur, 0, "ctx.shadowBlur", "0");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.attributes.shadowBlur.initial.worker.js b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.attributes.shadowBlur.initial.worker.js
new file mode 100644
index 0000000000..9cf55e796b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.attributes.shadowBlur.initial.worker.js
@@ -0,0 +1,23 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.shadow.attributes.shadowBlur.initial
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertSame(ctx.shadowBlur, 0, "ctx.shadowBlur", "0");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.attributes.shadowBlur.invalid.html b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.attributes.shadowBlur.invalid.html
new file mode 100644
index 0000000000..a506da4b8b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.attributes.shadowBlur.invalid.html
@@ -0,0 +1,38 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.shadow.attributes.shadowBlur.invalid</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.shadow.attributes.shadowBlur.invalid</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.shadowBlur = 1;
+ctx.shadowBlur = -2;
+_assertSame(ctx.shadowBlur, 1, "ctx.shadowBlur", "1");
+ctx.shadowBlur = 1;
+ctx.shadowBlur = Infinity;
+_assertSame(ctx.shadowBlur, 1, "ctx.shadowBlur", "1");
+ctx.shadowBlur = 1;
+ctx.shadowBlur = -Infinity;
+_assertSame(ctx.shadowBlur, 1, "ctx.shadowBlur", "1");
+ctx.shadowBlur = 1;
+ctx.shadowBlur = NaN;
+_assertSame(ctx.shadowBlur, 1, "ctx.shadowBlur", "1");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.attributes.shadowBlur.invalid.worker.js b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.attributes.shadowBlur.invalid.worker.js
new file mode 100644
index 0000000000..1f79c36d12
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.attributes.shadowBlur.invalid.worker.js
@@ -0,0 +1,34 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.shadow.attributes.shadowBlur.invalid
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.shadowBlur = 1;
+ctx.shadowBlur = -2;
+_assertSame(ctx.shadowBlur, 1, "ctx.shadowBlur", "1");
+ctx.shadowBlur = 1;
+ctx.shadowBlur = Infinity;
+_assertSame(ctx.shadowBlur, 1, "ctx.shadowBlur", "1");
+ctx.shadowBlur = 1;
+ctx.shadowBlur = -Infinity;
+_assertSame(ctx.shadowBlur, 1, "ctx.shadowBlur", "1");
+ctx.shadowBlur = 1;
+ctx.shadowBlur = NaN;
+_assertSame(ctx.shadowBlur, 1, "ctx.shadowBlur", "1");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.attributes.shadowBlur.valid.html b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.attributes.shadowBlur.valid.html
new file mode 100644
index 0000000000..b69b9c4717
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.attributes.shadowBlur.valid.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.shadow.attributes.shadowBlur.valid</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.shadow.attributes.shadowBlur.valid</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.shadowBlur = 1;
+_assertSame(ctx.shadowBlur, 1, "ctx.shadowBlur", "1");
+ctx.shadowBlur = 0.5;
+_assertSame(ctx.shadowBlur, 0.5, "ctx.shadowBlur", "0.5");
+ctx.shadowBlur = 1e6;
+_assertSame(ctx.shadowBlur, 1e6, "ctx.shadowBlur", "1e6");
+ctx.shadowBlur = 0;
+_assertSame(ctx.shadowBlur, 0, "ctx.shadowBlur", "0");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.attributes.shadowBlur.valid.worker.js b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.attributes.shadowBlur.valid.worker.js
new file mode 100644
index 0000000000..b41fa24905
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.attributes.shadowBlur.valid.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.shadow.attributes.shadowBlur.valid
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.shadowBlur = 1;
+_assertSame(ctx.shadowBlur, 1, "ctx.shadowBlur", "1");
+ctx.shadowBlur = 0.5;
+_assertSame(ctx.shadowBlur, 0.5, "ctx.shadowBlur", "0.5");
+ctx.shadowBlur = 1e6;
+_assertSame(ctx.shadowBlur, 1e6, "ctx.shadowBlur", "1e6");
+ctx.shadowBlur = 0;
+_assertSame(ctx.shadowBlur, 0, "ctx.shadowBlur", "0");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.attributes.shadowColor.initial.html b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.attributes.shadowColor.initial.html
new file mode 100644
index 0000000000..44a25308ac
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.attributes.shadowColor.initial.html
@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.shadow.attributes.shadowColor.initial</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.shadow.attributes.shadowColor.initial</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertSame(ctx.shadowColor, 'rgba(0, 0, 0, 0)', "ctx.shadowColor", "'rgba(0, 0, 0, 0)'");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.attributes.shadowColor.initial.worker.js b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.attributes.shadowColor.initial.worker.js
new file mode 100644
index 0000000000..f8132d5385
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.attributes.shadowColor.initial.worker.js
@@ -0,0 +1,23 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.shadow.attributes.shadowColor.initial
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertSame(ctx.shadowColor, 'rgba(0, 0, 0, 0)', "ctx.shadowColor", "'rgba(0, 0, 0, 0)'");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.attributes.shadowColor.invalid.html b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.attributes.shadowColor.invalid.html
new file mode 100644
index 0000000000..ed09bcbdcf
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.attributes.shadowColor.invalid.html
@@ -0,0 +1,38 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.shadow.attributes.shadowColor.invalid</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.shadow.attributes.shadowColor.invalid</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.shadowColor = '#00ff00';
+ctx.shadowColor = 'bogus';
+_assertSame(ctx.shadowColor, '#00ff00', "ctx.shadowColor", "'#00ff00'");
+ctx.shadowColor = '#00ff00';
+ctx.shadowColor = 'red bogus';
+_assertSame(ctx.shadowColor, '#00ff00', "ctx.shadowColor", "'#00ff00'");
+ctx.shadowColor = '#00ff00';
+ctx.shadowColor = ctx;
+_assertSame(ctx.shadowColor, '#00ff00', "ctx.shadowColor", "'#00ff00'");
+ctx.shadowColor = '#00ff00';
+ctx.shadowColor = undefined;
+_assertSame(ctx.shadowColor, '#00ff00', "ctx.shadowColor", "'#00ff00'");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.attributes.shadowColor.invalid.worker.js b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.attributes.shadowColor.invalid.worker.js
new file mode 100644
index 0000000000..b1003718c5
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.attributes.shadowColor.invalid.worker.js
@@ -0,0 +1,34 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.shadow.attributes.shadowColor.invalid
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.shadowColor = '#00ff00';
+ctx.shadowColor = 'bogus';
+_assertSame(ctx.shadowColor, '#00ff00', "ctx.shadowColor", "'#00ff00'");
+ctx.shadowColor = '#00ff00';
+ctx.shadowColor = 'red bogus';
+_assertSame(ctx.shadowColor, '#00ff00', "ctx.shadowColor", "'#00ff00'");
+ctx.shadowColor = '#00ff00';
+ctx.shadowColor = ctx;
+_assertSame(ctx.shadowColor, '#00ff00', "ctx.shadowColor", "'#00ff00'");
+ctx.shadowColor = '#00ff00';
+ctx.shadowColor = undefined;
+_assertSame(ctx.shadowColor, '#00ff00', "ctx.shadowColor", "'#00ff00'");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.attributes.shadowColor.valid.html b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.attributes.shadowColor.valid.html
new file mode 100644
index 0000000000..9511027b5a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.attributes.shadowColor.valid.html
@@ -0,0 +1,30 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.shadow.attributes.shadowColor.valid</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.shadow.attributes.shadowColor.valid</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.shadowColor = 'lime';
+_assertSame(ctx.shadowColor, '#00ff00', "ctx.shadowColor", "'#00ff00'");
+ctx.shadowColor = 'RGBA(0,255, 0,0)';
+_assertSame(ctx.shadowColor, 'rgba(0, 255, 0, 0)', "ctx.shadowColor", "'rgba(0, 255, 0, 0)'");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.attributes.shadowColor.valid.worker.js b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.attributes.shadowColor.valid.worker.js
new file mode 100644
index 0000000000..f47e3660b5
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.attributes.shadowColor.valid.worker.js
@@ -0,0 +1,26 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.shadow.attributes.shadowColor.valid
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.shadowColor = 'lime';
+_assertSame(ctx.shadowColor, '#00ff00', "ctx.shadowColor", "'#00ff00'");
+ctx.shadowColor = 'RGBA(0,255, 0,0)';
+_assertSame(ctx.shadowColor, 'rgba(0, 255, 0, 0)', "ctx.shadowColor", "'rgba(0, 255, 0, 0)'");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.attributes.shadowOffset.initial.html b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.attributes.shadowOffset.initial.html
new file mode 100644
index 0000000000..e568569a58
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.attributes.shadowOffset.initial.html
@@ -0,0 +1,28 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.shadow.attributes.shadowOffset.initial</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.shadow.attributes.shadowOffset.initial</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertSame(ctx.shadowOffsetX, 0, "ctx.shadowOffsetX", "0");
+_assertSame(ctx.shadowOffsetY, 0, "ctx.shadowOffsetY", "0");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.attributes.shadowOffset.initial.worker.js b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.attributes.shadowOffset.initial.worker.js
new file mode 100644
index 0000000000..af2e77f464
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.attributes.shadowOffset.initial.worker.js
@@ -0,0 +1,24 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.shadow.attributes.shadowOffset.initial
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertSame(ctx.shadowOffsetX, 0, "ctx.shadowOffsetX", "0");
+_assertSame(ctx.shadowOffsetY, 0, "ctx.shadowOffsetY", "0");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.attributes.shadowOffset.invalid.html b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.attributes.shadowOffset.invalid.html
new file mode 100644
index 0000000000..58c8efec20
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.attributes.shadowOffset.invalid.html
@@ -0,0 +1,44 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.shadow.attributes.shadowOffset.invalid</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.shadow.attributes.shadowOffset.invalid</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.shadowOffsetX = 1;
+ctx.shadowOffsetY = 2;
+ctx.shadowOffsetX = Infinity;
+ctx.shadowOffsetY = Infinity;
+_assertSame(ctx.shadowOffsetX, 1, "ctx.shadowOffsetX", "1");
+_assertSame(ctx.shadowOffsetY, 2, "ctx.shadowOffsetY", "2");
+ctx.shadowOffsetX = 1;
+ctx.shadowOffsetY = 2;
+ctx.shadowOffsetX = -Infinity;
+ctx.shadowOffsetY = -Infinity;
+_assertSame(ctx.shadowOffsetX, 1, "ctx.shadowOffsetX", "1");
+_assertSame(ctx.shadowOffsetY, 2, "ctx.shadowOffsetY", "2");
+ctx.shadowOffsetX = 1;
+ctx.shadowOffsetY = 2;
+ctx.shadowOffsetX = NaN;
+ctx.shadowOffsetY = NaN;
+_assertSame(ctx.shadowOffsetX, 1, "ctx.shadowOffsetX", "1");
+_assertSame(ctx.shadowOffsetY, 2, "ctx.shadowOffsetY", "2");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.attributes.shadowOffset.invalid.worker.js b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.attributes.shadowOffset.invalid.worker.js
new file mode 100644
index 0000000000..892614781a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.attributes.shadowOffset.invalid.worker.js
@@ -0,0 +1,40 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.shadow.attributes.shadowOffset.invalid
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.shadowOffsetX = 1;
+ctx.shadowOffsetY = 2;
+ctx.shadowOffsetX = Infinity;
+ctx.shadowOffsetY = Infinity;
+_assertSame(ctx.shadowOffsetX, 1, "ctx.shadowOffsetX", "1");
+_assertSame(ctx.shadowOffsetY, 2, "ctx.shadowOffsetY", "2");
+ctx.shadowOffsetX = 1;
+ctx.shadowOffsetY = 2;
+ctx.shadowOffsetX = -Infinity;
+ctx.shadowOffsetY = -Infinity;
+_assertSame(ctx.shadowOffsetX, 1, "ctx.shadowOffsetX", "1");
+_assertSame(ctx.shadowOffsetY, 2, "ctx.shadowOffsetY", "2");
+ctx.shadowOffsetX = 1;
+ctx.shadowOffsetY = 2;
+ctx.shadowOffsetX = NaN;
+ctx.shadowOffsetY = NaN;
+_assertSame(ctx.shadowOffsetX, 1, "ctx.shadowOffsetX", "1");
+_assertSame(ctx.shadowOffsetY, 2, "ctx.shadowOffsetY", "2");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.attributes.shadowOffset.valid.html b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.attributes.shadowOffset.valid.html
new file mode 100644
index 0000000000..1ad622c468
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.attributes.shadowOffset.valid.html
@@ -0,0 +1,46 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.shadow.attributes.shadowOffset.valid</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.shadow.attributes.shadowOffset.valid</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.shadowOffsetX = 1;
+ctx.shadowOffsetY = 2;
+_assertSame(ctx.shadowOffsetX, 1, "ctx.shadowOffsetX", "1");
+_assertSame(ctx.shadowOffsetY, 2, "ctx.shadowOffsetY", "2");
+ctx.shadowOffsetX = 0.5;
+ctx.shadowOffsetY = 0.25;
+_assertSame(ctx.shadowOffsetX, 0.5, "ctx.shadowOffsetX", "0.5");
+_assertSame(ctx.shadowOffsetY, 0.25, "ctx.shadowOffsetY", "0.25");
+ctx.shadowOffsetX = -0.5;
+ctx.shadowOffsetY = -0.25;
+_assertSame(ctx.shadowOffsetX, -0.5, "ctx.shadowOffsetX", "-0.5");
+_assertSame(ctx.shadowOffsetY, -0.25, "ctx.shadowOffsetY", "-0.25");
+ctx.shadowOffsetX = 0;
+ctx.shadowOffsetY = 0;
+_assertSame(ctx.shadowOffsetX, 0, "ctx.shadowOffsetX", "0");
+_assertSame(ctx.shadowOffsetY, 0, "ctx.shadowOffsetY", "0");
+ctx.shadowOffsetX = 1e6;
+ctx.shadowOffsetY = 1e6;
+_assertSame(ctx.shadowOffsetX, 1e6, "ctx.shadowOffsetX", "1e6");
+_assertSame(ctx.shadowOffsetY, 1e6, "ctx.shadowOffsetY", "1e6");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.attributes.shadowOffset.valid.worker.js b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.attributes.shadowOffset.valid.worker.js
new file mode 100644
index 0000000000..eed84b54e5
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.attributes.shadowOffset.valid.worker.js
@@ -0,0 +1,42 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.shadow.attributes.shadowOffset.valid
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.shadowOffsetX = 1;
+ctx.shadowOffsetY = 2;
+_assertSame(ctx.shadowOffsetX, 1, "ctx.shadowOffsetX", "1");
+_assertSame(ctx.shadowOffsetY, 2, "ctx.shadowOffsetY", "2");
+ctx.shadowOffsetX = 0.5;
+ctx.shadowOffsetY = 0.25;
+_assertSame(ctx.shadowOffsetX, 0.5, "ctx.shadowOffsetX", "0.5");
+_assertSame(ctx.shadowOffsetY, 0.25, "ctx.shadowOffsetY", "0.25");
+ctx.shadowOffsetX = -0.5;
+ctx.shadowOffsetY = -0.25;
+_assertSame(ctx.shadowOffsetX, -0.5, "ctx.shadowOffsetX", "-0.5");
+_assertSame(ctx.shadowOffsetY, -0.25, "ctx.shadowOffsetY", "-0.25");
+ctx.shadowOffsetX = 0;
+ctx.shadowOffsetY = 0;
+_assertSame(ctx.shadowOffsetX, 0, "ctx.shadowOffsetX", "0");
+_assertSame(ctx.shadowOffsetY, 0, "ctx.shadowOffsetY", "0");
+ctx.shadowOffsetX = 1e6;
+ctx.shadowOffsetY = 1e6;
+_assertSame(ctx.shadowOffsetX, 1e6, "ctx.shadowOffsetX", "1e6");
+_assertSame(ctx.shadowOffsetY, 1e6, "ctx.shadowOffsetY", "1e6");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.canvas.alpha.html b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.canvas.alpha.html
new file mode 100644
index 0000000000..5fea8a7cf3
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.canvas.alpha.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.shadow.canvas.alpha</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.shadow.canvas.alpha</h1>
+<p class="desc">Shadows are drawn correctly for partially-transparent canvases</p>
+
+
+<script>
+var t = async_test("Shadows are drawn correctly for partially-transparent canvases");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+var ctx2 = offscreenCanvas2.getContext('2d');
+ctx2.fillStyle = 'rgba(255, 0, 0, 0.5)';
+ctx2.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.shadowOffsetY = 50;
+ctx.shadowColor = '#00f';
+ctx.drawImage(offscreenCanvas2, 0, -50);
+_assertPixelApprox(canvas, 50,25, 127,0,127,255, 2);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.canvas.alpha.worker.js b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.canvas.alpha.worker.js
new file mode 100644
index 0000000000..663e89f284
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.canvas.alpha.worker.js
@@ -0,0 +1,32 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.shadow.canvas.alpha
+// Description:Shadows are drawn correctly for partially-transparent canvases
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Shadows are drawn correctly for partially-transparent canvases");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+var ctx2 = offscreenCanvas2.getContext('2d');
+ctx2.fillStyle = 'rgba(255, 0, 0, 0.5)';
+ctx2.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.shadowOffsetY = 50;
+ctx.shadowColor = '#00f';
+ctx.drawImage(offscreenCanvas2, 0, -50);
+_assertPixelApprox(canvas, 50,25, 127,0,127,255, 2);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.canvas.basic.html b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.canvas.basic.html
new file mode 100644
index 0000000000..2fc6b547d5
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.canvas.basic.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.shadow.canvas.basic</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.shadow.canvas.basic</h1>
+<p class="desc">Shadows are drawn for canvases</p>
+
+
+<script>
+var t = async_test("Shadows are drawn for canvases");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+var ctx2 = offscreenCanvas2.getContext('2d');
+ctx2.fillStyle = '#f00';
+ctx2.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.shadowColor = '#0f0';
+ctx.shadowOffsetY = 50;
+ctx.drawImage(offscreenCanvas2, 0, -50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.canvas.basic.worker.js b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.canvas.basic.worker.js
new file mode 100644
index 0000000000..20c433b2f6
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.canvas.basic.worker.js
@@ -0,0 +1,32 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.shadow.canvas.basic
+// Description:Shadows are drawn for canvases
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Shadows are drawn for canvases");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+var ctx2 = offscreenCanvas2.getContext('2d');
+ctx2.fillStyle = '#f00';
+ctx2.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.shadowColor = '#0f0';
+ctx.shadowOffsetY = 50;
+ctx.drawImage(offscreenCanvas2, 0, -50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.canvas.transparent.1.html b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.canvas.transparent.1.html
new file mode 100644
index 0000000000..1bfcb3bf3b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.canvas.transparent.1.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.shadow.canvas.transparent.1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.shadow.canvas.transparent.1</h1>
+<p class="desc">Shadows are not drawn for transparent canvases</p>
+
+
+<script>
+var t = async_test("Shadows are not drawn for transparent canvases");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+var ctx2 = offscreenCanvas2.getContext('2d');
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.shadowColor = '#f00';
+ctx.shadowOffsetY = 50;
+ctx.drawImage(offscreenCanvas2, 0, -50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.canvas.transparent.1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.canvas.transparent.1.worker.js
new file mode 100644
index 0000000000..413ba6b243
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.canvas.transparent.1.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.shadow.canvas.transparent.1
+// Description:Shadows are not drawn for transparent canvases
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Shadows are not drawn for transparent canvases");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+var ctx2 = offscreenCanvas2.getContext('2d');
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.shadowColor = '#f00';
+ctx.shadowOffsetY = 50;
+ctx.drawImage(offscreenCanvas2, 0, -50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.canvas.transparent.2.html b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.canvas.transparent.2.html
new file mode 100644
index 0000000000..6d30dfcb85
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.canvas.transparent.2.html
@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.shadow.canvas.transparent.2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.shadow.canvas.transparent.2</h1>
+<p class="desc">Shadows are not drawn for transparent parts of canvases</p>
+
+
+<script>
+var t = async_test("Shadows are not drawn for transparent parts of canvases");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+var ctx2 = offscreenCanvas2.getContext('2d');
+ctx2.fillStyle = '#f00';
+ctx2.fillRect(0, 0, 50, 50);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 50, 50);
+ctx.fillStyle = '#f00';
+ctx.fillRect(50, 0, 50, 50);
+ctx.shadowOffsetY = 50;
+ctx.shadowColor = '#0f0';
+ctx.drawImage(offscreenCanvas2, 50, -50);
+ctx.shadowColor = '#f00';
+ctx.drawImage(offscreenCanvas2, -50, -50);
+_assertPixel(canvas, 25,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 75,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.canvas.transparent.2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.canvas.transparent.2.worker.js
new file mode 100644
index 0000000000..d702ded746
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.canvas.transparent.2.worker.js
@@ -0,0 +1,38 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.shadow.canvas.transparent.2
+// Description:Shadows are not drawn for transparent parts of canvases
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Shadows are not drawn for transparent parts of canvases");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+var ctx2 = offscreenCanvas2.getContext('2d');
+ctx2.fillStyle = '#f00';
+ctx2.fillRect(0, 0, 50, 50);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 50, 50);
+ctx.fillStyle = '#f00';
+ctx.fillRect(50, 0, 50, 50);
+ctx.shadowOffsetY = 50;
+ctx.shadowColor = '#0f0';
+ctx.drawImage(offscreenCanvas2, 50, -50);
+ctx.shadowColor = '#f00';
+ctx.drawImage(offscreenCanvas2, -50, -50);
+_assertPixel(canvas, 25,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 75,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.clip.1.html b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.clip.1.html
new file mode 100644
index 0000000000..4beb1214b2
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.clip.1.html
@@ -0,0 +1,40 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.shadow.clip.1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.shadow.clip.1</h1>
+<p class="desc">Shadows of clipped shapes are still drawn within the clipping region</p>
+
+
+<script>
+var t = async_test("Shadows of clipped shapes are still drawn within the clipping region");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 50, 50);
+ctx.fillStyle = '#f00';
+ctx.fillRect(50, 0, 50, 50);
+ctx.save();
+ctx.beginPath();
+ctx.rect(50, 0, 50, 50);
+ctx.clip();
+ctx.shadowColor = '#0f0';
+ctx.shadowOffsetX = 50;
+ctx.fillRect(0, 0, 50, 50);
+ctx.restore();
+_assertPixel(canvas, 25,25, 0,255,0,255);
+_assertPixel(canvas, 75,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.clip.1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.clip.1.worker.js
new file mode 100644
index 0000000000..4fafad8330
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.clip.1.worker.js
@@ -0,0 +1,36 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.shadow.clip.1
+// Description:Shadows of clipped shapes are still drawn within the clipping region
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Shadows of clipped shapes are still drawn within the clipping region");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 50, 50);
+ctx.fillStyle = '#f00';
+ctx.fillRect(50, 0, 50, 50);
+ctx.save();
+ctx.beginPath();
+ctx.rect(50, 0, 50, 50);
+ctx.clip();
+ctx.shadowColor = '#0f0';
+ctx.shadowOffsetX = 50;
+ctx.fillRect(0, 0, 50, 50);
+ctx.restore();
+_assertPixel(canvas, 25,25, 0,255,0,255);
+_assertPixel(canvas, 75,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.clip.2.html b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.clip.2.html
new file mode 100644
index 0000000000..bc3de09db7
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.clip.2.html
@@ -0,0 +1,40 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.shadow.clip.2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.shadow.clip.2</h1>
+<p class="desc">Shadows are not drawn outside the clipping region</p>
+
+
+<script>
+var t = async_test("Shadows are not drawn outside the clipping region");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 50, 50);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(50, 0, 50, 50);
+ctx.save();
+ctx.beginPath();
+ctx.rect(0, 0, 50, 50);
+ctx.clip();
+ctx.shadowColor = '#f00';
+ctx.shadowOffsetX = 50;
+ctx.fillRect(0, 0, 50, 50);
+ctx.restore();
+_assertPixel(canvas, 25,25, 0,255,0,255);
+_assertPixel(canvas, 75,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.clip.2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.clip.2.worker.js
new file mode 100644
index 0000000000..dd2712af40
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.clip.2.worker.js
@@ -0,0 +1,36 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.shadow.clip.2
+// Description:Shadows are not drawn outside the clipping region
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Shadows are not drawn outside the clipping region");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 50, 50);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(50, 0, 50, 50);
+ctx.save();
+ctx.beginPath();
+ctx.rect(0, 0, 50, 50);
+ctx.clip();
+ctx.shadowColor = '#f00';
+ctx.shadowOffsetX = 50;
+ctx.fillRect(0, 0, 50, 50);
+ctx.restore();
+_assertPixel(canvas, 25,25, 0,255,0,255);
+_assertPixel(canvas, 75,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.clip.3.html b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.clip.3.html
new file mode 100644
index 0000000000..9656feb41f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.clip.3.html
@@ -0,0 +1,41 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.shadow.clip.3</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.shadow.clip.3</h1>
+<p class="desc">Shadows of clipped shapes are still drawn within the clipping region</p>
+
+
+<script>
+var t = async_test("Shadows of clipped shapes are still drawn within the clipping region");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 50, 50);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(50, 0, 50, 50);
+ctx.save();
+ctx.beginPath();
+ctx.rect(0, 0, 50, 50);
+ctx.clip();
+ctx.fillStyle = '#f00';
+ctx.shadowColor = '#0f0';
+ctx.shadowOffsetX = 50;
+ctx.fillRect(-50, 0, 50, 50);
+ctx.restore();
+_assertPixel(canvas, 25,25, 0,255,0,255);
+_assertPixel(canvas, 75,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.clip.3.worker.js b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.clip.3.worker.js
new file mode 100644
index 0000000000..ed4983ac8c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.clip.3.worker.js
@@ -0,0 +1,37 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.shadow.clip.3
+// Description:Shadows of clipped shapes are still drawn within the clipping region
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Shadows of clipped shapes are still drawn within the clipping region");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 50, 50);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(50, 0, 50, 50);
+ctx.save();
+ctx.beginPath();
+ctx.rect(0, 0, 50, 50);
+ctx.clip();
+ctx.fillStyle = '#f00';
+ctx.shadowColor = '#0f0';
+ctx.shadowOffsetX = 50;
+ctx.fillRect(-50, 0, 50, 50);
+ctx.restore();
+_assertPixel(canvas, 25,25, 0,255,0,255);
+_assertPixel(canvas, 75,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.composite.1.html b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.composite.1.html
new file mode 100644
index 0000000000..13e0daf3aa
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.composite.1.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.shadow.composite.1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.shadow.composite.1</h1>
+<p class="desc">Shadows are drawn using globalCompositeOperation</p>
+
+
+<script>
+var t = async_test("Shadows are drawn using globalCompositeOperation");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'xor';
+ctx.shadowColor = '#f00';
+ctx.shadowOffsetX = 100;
+ctx.fillStyle = '#0f0';
+ctx.fillRect(-100, 0, 200, 50);
+_assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.composite.1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.composite.1.worker.js
new file mode 100644
index 0000000000..04d4801db9
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.composite.1.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.shadow.composite.1
+// Description:Shadows are drawn using globalCompositeOperation
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Shadows are drawn using globalCompositeOperation");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'xor';
+ctx.shadowColor = '#f00';
+ctx.shadowOffsetX = 100;
+ctx.fillStyle = '#0f0';
+ctx.fillRect(-100, 0, 200, 50);
+_assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.composite.2.html b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.composite.2.html
new file mode 100644
index 0000000000..aea36997b6
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.composite.2.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.shadow.composite.2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.shadow.composite.2</h1>
+<p class="desc">Shadows are drawn using globalCompositeOperation</p>
+
+
+<script>
+var t = async_test("Shadows are drawn using globalCompositeOperation");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'xor';
+ctx.shadowColor = '#f00';
+ctx.shadowBlur = 1;
+ctx.fillStyle = '#0f0';
+ctx.fillRect(-10, -10, 120, 70);
+_assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.composite.2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.composite.2.worker.js
new file mode 100644
index 0000000000..505e3d535f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.composite.2.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.shadow.composite.2
+// Description:Shadows are drawn using globalCompositeOperation
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Shadows are drawn using globalCompositeOperation");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'xor';
+ctx.shadowColor = '#f00';
+ctx.shadowBlur = 1;
+ctx.fillStyle = '#0f0';
+ctx.fillRect(-10, -10, 120, 70);
+_assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.composite.3.html b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.composite.3.html
new file mode 100644
index 0000000000..2218602f38
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.composite.3.html
@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.shadow.composite.3</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.shadow.composite.3</h1>
+<p class="desc">Areas outside shadows are drawn correctly with destination-out</p>
+
+
+<script>
+var t = async_test("Areas outside shadows are drawn correctly with destination-out");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'destination-out';
+ctx.shadowColor = '#f00';
+ctx.shadowBlur = 10;
+ctx.fillStyle = '#f00';
+ctx.fillRect(200, 0, 100, 50);
+_assertPixelApprox(canvas, 5,5, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.composite.3.worker.js b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.composite.3.worker.js
new file mode 100644
index 0000000000..fd58d06192
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.composite.3.worker.js
@@ -0,0 +1,31 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.shadow.composite.3
+// Description:Areas outside shadows are drawn correctly with destination-out
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Areas outside shadows are drawn correctly with destination-out");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'destination-out';
+ctx.shadowColor = '#f00';
+ctx.shadowBlur = 10;
+ctx.fillStyle = '#f00';
+ctx.fillRect(200, 0, 100, 50);
+_assertPixelApprox(canvas, 5,5, 0,255,0,255, 2);
+_assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.enable.blur.html b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.enable.blur.html
new file mode 100644
index 0000000000..edc4c527b2
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.enable.blur.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.shadow.enable.blur</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.shadow.enable.blur</h1>
+<p class="desc">Shadows are drawn if shadowBlur is set</p>
+
+
+<script>
+var t = async_test("Shadows are drawn if shadowBlur is set");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.globalCompositeOperation = 'destination-atop';
+ctx.shadowColor = '#0f0';
+ctx.shadowBlur = 0.1;
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.enable.blur.worker.js b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.enable.blur.worker.js
new file mode 100644
index 0000000000..85bf21a086
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.enable.blur.worker.js
@@ -0,0 +1,28 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.shadow.enable.blur
+// Description:Shadows are drawn if shadowBlur is set
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Shadows are drawn if shadowBlur is set");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.globalCompositeOperation = 'destination-atop';
+ctx.shadowColor = '#0f0';
+ctx.shadowBlur = 0.1;
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.enable.off.1.html b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.enable.off.1.html
new file mode 100644
index 0000000000..f0c9282090
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.enable.off.1.html
@@ -0,0 +1,30 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.shadow.enable.off.1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.shadow.enable.off.1</h1>
+<p class="desc">Shadows are not drawn when only shadowColor is set</p>
+
+
+<script>
+var t = async_test("Shadows are not drawn when only shadowColor is set");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.shadowColor = '#f00';
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.enable.off.1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.enable.off.1.worker.js
new file mode 100644
index 0000000000..dae0ea648d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.enable.off.1.worker.js
@@ -0,0 +1,26 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.shadow.enable.off.1
+// Description:Shadows are not drawn when only shadowColor is set
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Shadows are not drawn when only shadowColor is set");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.shadowColor = '#f00';
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.enable.off.2.html b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.enable.off.2.html
new file mode 100644
index 0000000000..3c27b988c9
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.enable.off.2.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.shadow.enable.off.2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.shadow.enable.off.2</h1>
+<p class="desc">Shadows are not drawn when only shadowColor is set</p>
+
+
+<script>
+var t = async_test("Shadows are not drawn when only shadowColor is set");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.globalCompositeOperation = 'destination-atop';
+ctx.shadowColor = '#f00';
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.enable.off.2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.enable.off.2.worker.js
new file mode 100644
index 0000000000..2f1573ef3f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.enable.off.2.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.shadow.enable.off.2
+// Description:Shadows are not drawn when only shadowColor is set
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Shadows are not drawn when only shadowColor is set");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.globalCompositeOperation = 'destination-atop';
+ctx.shadowColor = '#f00';
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.enable.x.html b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.enable.x.html
new file mode 100644
index 0000000000..9107ef25de
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.enable.x.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.shadow.enable.x</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.shadow.enable.x</h1>
+<p class="desc">Shadows are drawn if shadowOffsetX is set</p>
+
+
+<script>
+var t = async_test("Shadows are drawn if shadowOffsetX is set");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.globalCompositeOperation = 'destination-atop';
+ctx.shadowColor = '#0f0';
+ctx.shadowOffsetX = 0.1;
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.enable.x.worker.js b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.enable.x.worker.js
new file mode 100644
index 0000000000..d8e7d5039b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.enable.x.worker.js
@@ -0,0 +1,28 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.shadow.enable.x
+// Description:Shadows are drawn if shadowOffsetX is set
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Shadows are drawn if shadowOffsetX is set");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.globalCompositeOperation = 'destination-atop';
+ctx.shadowColor = '#0f0';
+ctx.shadowOffsetX = 0.1;
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.enable.y.html b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.enable.y.html
new file mode 100644
index 0000000000..77a79d8457
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.enable.y.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.shadow.enable.y</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.shadow.enable.y</h1>
+<p class="desc">Shadows are drawn if shadowOffsetY is set</p>
+
+
+<script>
+var t = async_test("Shadows are drawn if shadowOffsetY is set");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.globalCompositeOperation = 'destination-atop';
+ctx.shadowColor = '#0f0';
+ctx.shadowOffsetY = 0.1;
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.enable.y.worker.js b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.enable.y.worker.js
new file mode 100644
index 0000000000..53140b13a9
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.enable.y.worker.js
@@ -0,0 +1,28 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.shadow.enable.y
+// Description:Shadows are drawn if shadowOffsetY is set
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Shadows are drawn if shadowOffsetY is set");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.globalCompositeOperation = 'destination-atop';
+ctx.shadowColor = '#0f0';
+ctx.shadowOffsetY = 0.1;
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.gradient.alpha.html b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.gradient.alpha.html
new file mode 100644
index 0000000000..d92a248440
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.gradient.alpha.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.shadow.gradient.alpha</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.shadow.gradient.alpha</h1>
+<p class="desc">Shadows are drawn correctly for partially-transparent gradient fills</p>
+
+
+<script>
+var t = async_test("Shadows are drawn correctly for partially-transparent gradient fills");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var gradient = ctx.createLinearGradient(0, 0, 100, 0);
+gradient.addColorStop(0, 'rgba(255,0,0,0.5)');
+gradient.addColorStop(1, 'rgba(255,0,0,0.5)');
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.shadowOffsetY = 50;
+ctx.shadowColor = '#00f';
+ctx.fillStyle = gradient;
+ctx.fillRect(0, -50, 100, 50);
+_assertPixelApprox(canvas, 50,25, 127,0,127,255, 2);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.gradient.alpha.worker.js b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.gradient.alpha.worker.js
new file mode 100644
index 0000000000..b5b65a0056
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.gradient.alpha.worker.js
@@ -0,0 +1,32 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.shadow.gradient.alpha
+// Description:Shadows are drawn correctly for partially-transparent gradient fills
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Shadows are drawn correctly for partially-transparent gradient fills");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var gradient = ctx.createLinearGradient(0, 0, 100, 0);
+gradient.addColorStop(0, 'rgba(255,0,0,0.5)');
+gradient.addColorStop(1, 'rgba(255,0,0,0.5)');
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.shadowOffsetY = 50;
+ctx.shadowColor = '#00f';
+ctx.fillStyle = gradient;
+ctx.fillRect(0, -50, 100, 50);
+_assertPixelApprox(canvas, 50,25, 127,0,127,255, 2);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.gradient.basic.html b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.gradient.basic.html
new file mode 100644
index 0000000000..b88281be9a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.gradient.basic.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.shadow.gradient.basic</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.shadow.gradient.basic</h1>
+<p class="desc">Shadows are drawn for gradient fills</p>
+
+
+<script>
+var t = async_test("Shadows are drawn for gradient fills");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var gradient = ctx.createLinearGradient(0, 0, 100, 0);
+gradient.addColorStop(0, '#f00');
+gradient.addColorStop(1, '#f00');
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.shadowColor = '#0f0';
+ctx.shadowOffsetY = 50;
+ctx.fillStyle = gradient;
+ctx.fillRect(0, -50, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.gradient.basic.worker.js b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.gradient.basic.worker.js
new file mode 100644
index 0000000000..ef9ce712f2
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.gradient.basic.worker.js
@@ -0,0 +1,32 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.shadow.gradient.basic
+// Description:Shadows are drawn for gradient fills
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Shadows are drawn for gradient fills");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var gradient = ctx.createLinearGradient(0, 0, 100, 0);
+gradient.addColorStop(0, '#f00');
+gradient.addColorStop(1, '#f00');
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.shadowColor = '#0f0';
+ctx.shadowOffsetY = 50;
+ctx.fillStyle = gradient;
+ctx.fillRect(0, -50, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.gradient.transparent.1.html b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.gradient.transparent.1.html
new file mode 100644
index 0000000000..f71a8b4222
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.gradient.transparent.1.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.shadow.gradient.transparent.1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.shadow.gradient.transparent.1</h1>
+<p class="desc">Shadows are not drawn for transparent gradient fills</p>
+
+
+<script>
+var t = async_test("Shadows are not drawn for transparent gradient fills");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var gradient = ctx.createLinearGradient(0, 0, 100, 0);
+gradient.addColorStop(0, 'rgba(0,0,0,0)');
+gradient.addColorStop(1, 'rgba(0,0,0,0)');
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.shadowColor = '#f00';
+ctx.shadowOffsetY = 50;
+ctx.fillStyle = gradient;
+ctx.fillRect(0, -50, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.gradient.transparent.1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.gradient.transparent.1.worker.js
new file mode 100644
index 0000000000..b60d6f7f59
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.gradient.transparent.1.worker.js
@@ -0,0 +1,32 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.shadow.gradient.transparent.1
+// Description:Shadows are not drawn for transparent gradient fills
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Shadows are not drawn for transparent gradient fills");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var gradient = ctx.createLinearGradient(0, 0, 100, 0);
+gradient.addColorStop(0, 'rgba(0,0,0,0)');
+gradient.addColorStop(1, 'rgba(0,0,0,0)');
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.shadowColor = '#f00';
+ctx.shadowOffsetY = 50;
+ctx.fillStyle = gradient;
+ctx.fillRect(0, -50, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.gradient.transparent.2.html b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.gradient.transparent.2.html
new file mode 100644
index 0000000000..d7c560ec46
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.gradient.transparent.2.html
@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.shadow.gradient.transparent.2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.shadow.gradient.transparent.2</h1>
+<p class="desc">Shadows are not drawn for transparent parts of gradient fills</p>
+
+
+<script>
+var t = async_test("Shadows are not drawn for transparent parts of gradient fills");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var gradient = ctx.createLinearGradient(0, 0, 100, 0);
+gradient.addColorStop(0, '#f00');
+gradient.addColorStop(0.499, '#f00');
+gradient.addColorStop(0.5, 'rgba(0,0,0,0)');
+gradient.addColorStop(1, 'rgba(0,0,0,0)');
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 50, 50);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(50, 0, 50, 50);
+ctx.shadowOffsetY = 50;
+ctx.shadowColor = '#0f0';
+ctx.fillStyle = gradient;
+ctx.fillRect(0, -50, 100, 50);
+_assertPixel(canvas, 25,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 75,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.gradient.transparent.2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.gradient.transparent.2.worker.js
new file mode 100644
index 0000000000..7226b004b8
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.gradient.transparent.2.worker.js
@@ -0,0 +1,38 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.shadow.gradient.transparent.2
+// Description:Shadows are not drawn for transparent parts of gradient fills
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Shadows are not drawn for transparent parts of gradient fills");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var gradient = ctx.createLinearGradient(0, 0, 100, 0);
+gradient.addColorStop(0, '#f00');
+gradient.addColorStop(0.499, '#f00');
+gradient.addColorStop(0.5, 'rgba(0,0,0,0)');
+gradient.addColorStop(1, 'rgba(0,0,0,0)');
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 50, 50);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(50, 0, 50, 50);
+ctx.shadowOffsetY = 50;
+ctx.shadowColor = '#0f0';
+ctx.fillStyle = gradient;
+ctx.fillRect(0, -50, 100, 50);
+_assertPixel(canvas, 25,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 75,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.image.alpha.html b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.image.alpha.html
new file mode 100644
index 0000000000..5add7eae5a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.image.alpha.html
@@ -0,0 +1,44 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.shadow.image.alpha</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.shadow.image.alpha</h1>
+<p class="desc">Shadows are drawn correctly for partially-transparent images</p>
+
+
+<script>
+var t = async_test("Shadows are drawn correctly for partially-transparent images");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.shadowOffsetY = 50;
+ctx.shadowColor = '#00f';
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/transparent50.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 0, -50);
+ _assertPixelApprox(canvas, 50,25, 127,0,127,255, 2);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.image.alpha.worker.js b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.image.alpha.worker.js
new file mode 100644
index 0000000000..7a1d99218f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.image.alpha.worker.js
@@ -0,0 +1,40 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.shadow.image.alpha
+// Description:Shadows are drawn correctly for partially-transparent images
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Shadows are drawn correctly for partially-transparent images");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.shadowOffsetY = 50;
+ctx.shadowColor = '#00f';
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/transparent50.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 0, -50);
+ _assertPixelApprox(canvas, 50,25, 127,0,127,255, 2);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.image.basic.html b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.image.basic.html
new file mode 100644
index 0000000000..101cfbab0c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.image.basic.html
@@ -0,0 +1,44 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.shadow.image.basic</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.shadow.image.basic</h1>
+<p class="desc">Shadows are drawn for images</p>
+
+
+<script>
+var t = async_test("Shadows are drawn for images");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.shadowColor = '#0f0';
+ctx.shadowOffsetY = 50;
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/red.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 0, -50);
+ _assertPixel(canvas, 50,25, 0,255,0,255);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.image.basic.worker.js b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.image.basic.worker.js
new file mode 100644
index 0000000000..f1d72def72
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.image.basic.worker.js
@@ -0,0 +1,40 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.shadow.image.basic
+// Description:Shadows are drawn for images
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Shadows are drawn for images");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.shadowColor = '#0f0';
+ctx.shadowOffsetY = 50;
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/red.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 0, -50);
+ _assertPixel(canvas, 50,25, 0,255,0,255);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.image.scale.html b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.image.scale.html
new file mode 100644
index 0000000000..c56a73f736
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.image.scale.html
@@ -0,0 +1,46 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.shadow.image.scale</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.shadow.image.scale</h1>
+<p class="desc">Shadows are drawn correctly for scaled images</p>
+
+
+<script>
+var t = async_test("Shadows are drawn correctly for scaled images");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.shadowOffsetY = 50;
+ctx.shadowColor = '#0f0';
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/redtransparent.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 0, 0, 100, 50, -10, -50, 240, 50);
+ _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.image.scale.worker.js b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.image.scale.worker.js
new file mode 100644
index 0000000000..a8c0ead903
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.image.scale.worker.js
@@ -0,0 +1,42 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.shadow.image.scale
+// Description:Shadows are drawn correctly for scaled images
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Shadows are drawn correctly for scaled images");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.shadowOffsetY = 50;
+ctx.shadowColor = '#0f0';
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/redtransparent.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 0, 0, 100, 50, -10, -50, 240, 50);
+ _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.image.section.html b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.image.section.html
new file mode 100644
index 0000000000..cd09503499
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.image.section.html
@@ -0,0 +1,46 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.shadow.image.section</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.shadow.image.section</h1>
+<p class="desc">Shadows are not drawn for areas outside image source rectangles</p>
+
+
+<script>
+var t = async_test("Shadows are not drawn for areas outside image source rectangles");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.shadowOffsetY = 50;
+ctx.shadowColor = '#f00';
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/redtransparent.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 50, 0, 50, 50, 0, -50, 50, 50);
+ _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.image.section.worker.js b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.image.section.worker.js
new file mode 100644
index 0000000000..60e32b4883
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.image.section.worker.js
@@ -0,0 +1,42 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.shadow.image.section
+// Description:Shadows are not drawn for areas outside image source rectangles
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Shadows are not drawn for areas outside image source rectangles");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.shadowOffsetY = 50;
+ctx.shadowColor = '#f00';
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/redtransparent.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 50, 0, 50, 50, 0, -50, 50, 50);
+ _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.image.transparent.1.html b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.image.transparent.1.html
new file mode 100644
index 0000000000..37844050a9
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.image.transparent.1.html
@@ -0,0 +1,44 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.shadow.image.transparent.1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.shadow.image.transparent.1</h1>
+<p class="desc">Shadows are not drawn for transparent images</p>
+
+
+<script>
+var t = async_test("Shadows are not drawn for transparent images");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.shadowColor = '#f00';
+ctx.shadowOffsetY = 50;
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/transparent.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 0, -50);
+ _assertPixel(canvas, 50,25, 0,255,0,255);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.image.transparent.1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.image.transparent.1.worker.js
new file mode 100644
index 0000000000..8e8ded8bd3
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.image.transparent.1.worker.js
@@ -0,0 +1,40 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.shadow.image.transparent.1
+// Description:Shadows are not drawn for transparent images
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Shadows are not drawn for transparent images");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.shadowColor = '#f00';
+ctx.shadowOffsetY = 50;
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/transparent.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 0, -50);
+ _assertPixel(canvas, 50,25, 0,255,0,255);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.image.transparent.2.html b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.image.transparent.2.html
new file mode 100644
index 0000000000..996bce718a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.image.transparent.2.html
@@ -0,0 +1,50 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.shadow.image.transparent.2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.shadow.image.transparent.2</h1>
+<p class="desc">Shadows are not drawn for transparent parts of images</p>
+
+
+<script>
+var t = async_test("Shadows are not drawn for transparent parts of images");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 50, 50);
+ctx.fillStyle = '#f00';
+ctx.fillRect(50, 0, 50, 50);
+ctx.shadowOffsetY = 50;
+ctx.shadowColor = '#0f0';
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/redtransparent.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 50, -50);
+ ctx.shadowColor = '#f00';
+ ctx.drawImage(bitmap, -50, -50);
+ _assertPixel(canvas, 25,25, 0,255,0,255);
+ _assertPixel(canvas, 50,25, 0,255,0,255);
+ _assertPixel(canvas, 75,25, 0,255,0,255);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.image.transparent.2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.image.transparent.2.worker.js
new file mode 100644
index 0000000000..5075d6cfa7
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.image.transparent.2.worker.js
@@ -0,0 +1,46 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.shadow.image.transparent.2
+// Description:Shadows are not drawn for transparent parts of images
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Shadows are not drawn for transparent parts of images");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 50, 50);
+ctx.fillStyle = '#f00';
+ctx.fillRect(50, 0, 50, 50);
+ctx.shadowOffsetY = 50;
+ctx.shadowColor = '#0f0';
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/redtransparent.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ ctx.drawImage(bitmap, 50, -50);
+ ctx.shadowColor = '#f00';
+ ctx.drawImage(bitmap, -50, -50);
+ _assertPixel(canvas, 25,25, 0,255,0,255);
+ _assertPixel(canvas, 50,25, 0,255,0,255);
+ _assertPixel(canvas, 75,25, 0,255,0,255);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.offset.negativeX.html b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.offset.negativeX.html
new file mode 100644
index 0000000000..97c04018ac
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.offset.negativeX.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.shadow.offset.negativeX</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.shadow.offset.negativeX</h1>
+<p class="desc">Shadows can be offset with negative x</p>
+
+
+<script>
+var t = async_test("Shadows can be offset with negative x");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.shadowColor = '#0f0';
+ctx.shadowOffsetX = -50;
+ctx.fillRect(50, 0, 50, 50);
+_assertPixel(canvas, 25,25, 0,255,0,255);
+_assertPixel(canvas, 75,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.offset.negativeX.worker.js b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.offset.negativeX.worker.js
new file mode 100644
index 0000000000..93c226570f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.offset.negativeX.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.shadow.offset.negativeX
+// Description:Shadows can be offset with negative x
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Shadows can be offset with negative x");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.shadowColor = '#0f0';
+ctx.shadowOffsetX = -50;
+ctx.fillRect(50, 0, 50, 50);
+_assertPixel(canvas, 25,25, 0,255,0,255);
+_assertPixel(canvas, 75,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.offset.negativeY.html b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.offset.negativeY.html
new file mode 100644
index 0000000000..7f5d5ab9a8
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.offset.negativeY.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.shadow.offset.negativeY</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.shadow.offset.negativeY</h1>
+<p class="desc">Shadows can be offset with negative y</p>
+
+
+<script>
+var t = async_test("Shadows can be offset with negative y");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.shadowColor = '#0f0';
+ctx.shadowOffsetY = -25;
+ctx.fillRect(0, 25, 100, 25);
+_assertPixel(canvas, 50,12, 0,255,0,255);
+_assertPixel(canvas, 50,37, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.offset.negativeY.worker.js b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.offset.negativeY.worker.js
new file mode 100644
index 0000000000..6ee0bcc7c5
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.offset.negativeY.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.shadow.offset.negativeY
+// Description:Shadows can be offset with negative y
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Shadows can be offset with negative y");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.shadowColor = '#0f0';
+ctx.shadowOffsetY = -25;
+ctx.fillRect(0, 25, 100, 25);
+_assertPixel(canvas, 50,12, 0,255,0,255);
+_assertPixel(canvas, 50,37, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.offset.positiveX.html b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.offset.positiveX.html
new file mode 100644
index 0000000000..a745de88ab
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.offset.positiveX.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.shadow.offset.positiveX</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.shadow.offset.positiveX</h1>
+<p class="desc">Shadows can be offset with positive x</p>
+
+
+<script>
+var t = async_test("Shadows can be offset with positive x");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.shadowColor = '#0f0';
+ctx.shadowOffsetX = 50;
+ctx.fillRect(0, 0, 50, 50);
+_assertPixel(canvas, 25,25, 0,255,0,255);
+_assertPixel(canvas, 75,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.offset.positiveX.worker.js b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.offset.positiveX.worker.js
new file mode 100644
index 0000000000..241fbda8f3
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.offset.positiveX.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.shadow.offset.positiveX
+// Description:Shadows can be offset with positive x
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Shadows can be offset with positive x");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.shadowColor = '#0f0';
+ctx.shadowOffsetX = 50;
+ctx.fillRect(0, 0, 50, 50);
+_assertPixel(canvas, 25,25, 0,255,0,255);
+_assertPixel(canvas, 75,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.offset.positiveY.html b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.offset.positiveY.html
new file mode 100644
index 0000000000..168b179688
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.offset.positiveY.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.shadow.offset.positiveY</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.shadow.offset.positiveY</h1>
+<p class="desc">Shadows can be offset with positive y</p>
+
+
+<script>
+var t = async_test("Shadows can be offset with positive y");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.shadowColor = '#0f0';
+ctx.shadowOffsetY = 25;
+ctx.fillRect(0, 0, 100, 25);
+_assertPixel(canvas, 50,12, 0,255,0,255);
+_assertPixel(canvas, 50,37, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.offset.positiveY.worker.js b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.offset.positiveY.worker.js
new file mode 100644
index 0000000000..b3236d66a5
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.offset.positiveY.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.shadow.offset.positiveY
+// Description:Shadows can be offset with positive y
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Shadows can be offset with positive y");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.shadowColor = '#0f0';
+ctx.shadowOffsetY = 25;
+ctx.fillRect(0, 0, 100, 25);
+_assertPixel(canvas, 50,12, 0,255,0,255);
+_assertPixel(canvas, 50,37, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.outside.html b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.outside.html
new file mode 100644
index 0000000000..207160d20f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.outside.html
@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.shadow.outside</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.shadow.outside</h1>
+<p class="desc">Shadows of shapes outside the visible area can be offset onto the visible area</p>
+
+
+<script>
+var t = async_test("Shadows of shapes outside the visible area can be offset onto the visible area");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.shadowColor = '#0f0';
+ctx.shadowOffsetX = 100;
+ctx.fillRect(-100, 0, 25, 50);
+ctx.shadowOffsetX = -100;
+ctx.fillRect(175, 0, 25, 50);
+ctx.shadowOffsetX = 0;
+ctx.shadowOffsetY = 100;
+ctx.fillRect(25, -100, 50, 25);
+ctx.shadowOffsetY = -100;
+ctx.fillRect(25, 125, 50, 25);
+_assertPixel(canvas, 12,25, 0,255,0,255);
+_assertPixel(canvas, 87,25, 0,255,0,255);
+_assertPixel(canvas, 50,12, 0,255,0,255);
+_assertPixel(canvas, 50,37, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.outside.worker.js b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.outside.worker.js
new file mode 100644
index 0000000000..d0787d67a4
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.outside.worker.js
@@ -0,0 +1,38 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.shadow.outside
+// Description:Shadows of shapes outside the visible area can be offset onto the visible area
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Shadows of shapes outside the visible area can be offset onto the visible area");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.shadowColor = '#0f0';
+ctx.shadowOffsetX = 100;
+ctx.fillRect(-100, 0, 25, 50);
+ctx.shadowOffsetX = -100;
+ctx.fillRect(175, 0, 25, 50);
+ctx.shadowOffsetX = 0;
+ctx.shadowOffsetY = 100;
+ctx.fillRect(25, -100, 50, 25);
+ctx.shadowOffsetY = -100;
+ctx.fillRect(25, 125, 50, 25);
+_assertPixel(canvas, 12,25, 0,255,0,255);
+_assertPixel(canvas, 87,25, 0,255,0,255);
+_assertPixel(canvas, 50,12, 0,255,0,255);
+_assertPixel(canvas, 50,37, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.pattern.alpha.html b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.pattern.alpha.html
new file mode 100644
index 0000000000..48615eadcf
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.pattern.alpha.html
@@ -0,0 +1,45 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.shadow.pattern.alpha</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.shadow.pattern.alpha</h1>
+<p class="desc">Shadows are drawn correctly for partially-transparent fill patterns</p>
+
+
+<script>
+var t = async_test("Shadows are drawn correctly for partially-transparent fill patterns");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/transparent50.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ var pattern = ctx.createPattern(bitmap, 'repeat');
+ ctx.fillStyle = '#f00';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.shadowOffsetY = 50;
+ ctx.shadowColor = '#00f';
+ ctx.fillStyle = pattern;
+ ctx.fillRect(0, -50, 100, 50);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.pattern.alpha.worker.js b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.pattern.alpha.worker.js
new file mode 100644
index 0000000000..6a533845ab
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.pattern.alpha.worker.js
@@ -0,0 +1,41 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.shadow.pattern.alpha
+// Description:Shadows are drawn correctly for partially-transparent fill patterns
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Shadows are drawn correctly for partially-transparent fill patterns");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/transparent50.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ var pattern = ctx.createPattern(bitmap, 'repeat');
+ ctx.fillStyle = '#f00';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.shadowOffsetY = 50;
+ ctx.shadowColor = '#00f';
+ ctx.fillStyle = pattern;
+ ctx.fillRect(0, -50, 100, 50);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.pattern.basic.html b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.pattern.basic.html
new file mode 100644
index 0000000000..586f7ef336
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.pattern.basic.html
@@ -0,0 +1,45 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.shadow.pattern.basic</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.shadow.pattern.basic</h1>
+<p class="desc">Shadows are drawn for fill patterns</p>
+
+
+<script>
+var t = async_test("Shadows are drawn for fill patterns");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/red.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ var pattern = ctx.createPattern(bitmap, 'repeat');
+ ctx.fillStyle = '#f00';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.shadowColor = '#0f0';
+ ctx.shadowOffsetY = 50;
+ ctx.fillStyle = pattern;
+ ctx.fillRect(0, -50, 100, 50);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.pattern.basic.worker.js b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.pattern.basic.worker.js
new file mode 100644
index 0000000000..6d2dce7c1b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.pattern.basic.worker.js
@@ -0,0 +1,41 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.shadow.pattern.basic
+// Description:Shadows are drawn for fill patterns
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Shadows are drawn for fill patterns");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/red.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ var pattern = ctx.createPattern(bitmap, 'repeat');
+ ctx.fillStyle = '#f00';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.shadowColor = '#0f0';
+ ctx.shadowOffsetY = 50;
+ ctx.fillStyle = pattern;
+ ctx.fillRect(0, -50, 100, 50);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.pattern.transparent.1.html b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.pattern.transparent.1.html
new file mode 100644
index 0000000000..6d97b590af
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.pattern.transparent.1.html
@@ -0,0 +1,45 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.shadow.pattern.transparent.1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.shadow.pattern.transparent.1</h1>
+<p class="desc">Shadows are not drawn for transparent fill patterns</p>
+
+
+<script>
+var t = async_test("Shadows are not drawn for transparent fill patterns");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/transparent.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ var pattern = ctx.createPattern(bitmap, 'repeat');
+ ctx.fillStyle = '#0f0';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.shadowColor = '#f00';
+ ctx.shadowOffsetY = 50;
+ ctx.fillStyle = pattern;
+ ctx.fillRect(0, -50, 100, 50);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.pattern.transparent.1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.pattern.transparent.1.worker.js
new file mode 100644
index 0000000000..cda0aa956d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.pattern.transparent.1.worker.js
@@ -0,0 +1,41 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.shadow.pattern.transparent.1
+// Description:Shadows are not drawn for transparent fill patterns
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Shadows are not drawn for transparent fill patterns");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/transparent.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ var pattern = ctx.createPattern(bitmap, 'repeat');
+ ctx.fillStyle = '#0f0';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.shadowColor = '#f00';
+ ctx.shadowOffsetY = 50;
+ ctx.fillStyle = pattern;
+ ctx.fillRect(0, -50, 100, 50);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.pattern.transparent.2.html b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.pattern.transparent.2.html
new file mode 100644
index 0000000000..600fbd03ff
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.pattern.transparent.2.html
@@ -0,0 +1,50 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.shadow.pattern.transparent.2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.shadow.pattern.transparent.2</h1>
+<p class="desc">Shadows are not drawn for transparent parts of fill patterns</p>
+
+
+<script>
+var t = async_test("Shadows are not drawn for transparent parts of fill patterns");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/redtransparent.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ var pattern = ctx.createPattern(bitmap, 'repeat');
+ ctx.fillStyle = '#f00';
+ ctx.fillRect(0, 0, 50, 50);
+ ctx.fillStyle = '#0f0';
+ ctx.fillRect(50, 0, 50, 50);
+ ctx.shadowOffsetY = 50;
+ ctx.shadowColor = '#0f0';
+ ctx.fillStyle = pattern;
+ ctx.fillRect(0, -50, 100, 50);
+ _assertPixel(canvas, 25,25, 0,255,0,255);
+ _assertPixel(canvas, 50,25, 0,255,0,255);
+ _assertPixel(canvas, 75,25, 0,255,0,255);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.pattern.transparent.2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.pattern.transparent.2.worker.js
new file mode 100644
index 0000000000..2aa3166146
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.pattern.transparent.2.worker.js
@@ -0,0 +1,46 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.shadow.pattern.transparent.2
+// Description:Shadows are not drawn for transparent parts of fill patterns
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Shadows are not drawn for transparent parts of fill patterns");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var promise = new Promise(function(resolve, reject) {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", '/images/redtransparent.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+});
+promise.then(function(response) {
+ createImageBitmap(response).then(bitmap => {
+ var pattern = ctx.createPattern(bitmap, 'repeat');
+ ctx.fillStyle = '#f00';
+ ctx.fillRect(0, 0, 50, 50);
+ ctx.fillStyle = '#0f0';
+ ctx.fillRect(50, 0, 50, 50);
+ ctx.shadowOffsetY = 50;
+ ctx.shadowColor = '#0f0';
+ ctx.fillStyle = pattern;
+ ctx.fillRect(0, -50, 100, 50);
+ _assertPixel(canvas, 25,25, 0,255,0,255);
+ _assertPixel(canvas, 50,25, 0,255,0,255);
+ _assertPixel(canvas, 75,25, 0,255,0,255);
+ }, t_fail);
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.stroke.basic.html b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.stroke.basic.html
new file mode 100644
index 0000000000..2711025134
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.stroke.basic.html
@@ -0,0 +1,39 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.shadow.stroke.basic</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.shadow.stroke.basic</h1>
+<p class="desc">Shadows are drawn for strokes</p>
+
+
+<script>
+var t = async_test("Shadows are drawn for strokes");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#f00';
+ctx.shadowColor = '#0f0';
+ctx.shadowOffsetY = 50;
+ctx.beginPath();
+ctx.lineWidth = 50;
+ctx.moveTo(0, -25);
+ctx.lineTo(100, -25);
+ctx.stroke();
+_assertPixel(canvas, 1,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 98,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.stroke.basic.worker.js b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.stroke.basic.worker.js
new file mode 100644
index 0000000000..7ebbd8ec5b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.stroke.basic.worker.js
@@ -0,0 +1,35 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.shadow.stroke.basic
+// Description:Shadows are drawn for strokes
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Shadows are drawn for strokes");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#f00';
+ctx.shadowColor = '#0f0';
+ctx.shadowOffsetY = 50;
+ctx.beginPath();
+ctx.lineWidth = 50;
+ctx.moveTo(0, -25);
+ctx.lineTo(100, -25);
+ctx.stroke();
+_assertPixel(canvas, 1,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 98,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.stroke.cap.1.html b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.stroke.cap.1.html
new file mode 100644
index 0000000000..3854669bf0
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.stroke.cap.1.html
@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.shadow.stroke.cap.1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.shadow.stroke.cap.1</h1>
+<p class="desc">Shadows are not drawn for areas outside stroke caps</p>
+
+
+<script>
+var t = async_test("Shadows are not drawn for areas outside stroke caps");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#f00';
+ctx.shadowColor = '#f00';
+ctx.shadowOffsetY = 50;
+ctx.beginPath();
+ctx.lineWidth = 50;
+ctx.lineCap = 'butt';
+ctx.moveTo(-50, -25);
+ctx.lineTo(0, -25);
+ctx.moveTo(100, -25);
+ctx.lineTo(150, -25);
+ctx.stroke();
+_assertPixel(canvas, 1,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 98,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.stroke.cap.1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.stroke.cap.1.worker.js
new file mode 100644
index 0000000000..7ecd07b1cd
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.stroke.cap.1.worker.js
@@ -0,0 +1,38 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.shadow.stroke.cap.1
+// Description:Shadows are not drawn for areas outside stroke caps
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Shadows are not drawn for areas outside stroke caps");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#f00';
+ctx.shadowColor = '#f00';
+ctx.shadowOffsetY = 50;
+ctx.beginPath();
+ctx.lineWidth = 50;
+ctx.lineCap = 'butt';
+ctx.moveTo(-50, -25);
+ctx.lineTo(0, -25);
+ctx.moveTo(100, -25);
+ctx.lineTo(150, -25);
+ctx.stroke();
+_assertPixel(canvas, 1,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 98,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.stroke.cap.2.html b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.stroke.cap.2.html
new file mode 100644
index 0000000000..bd18ec6f8c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.stroke.cap.2.html
@@ -0,0 +1,40 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.shadow.stroke.cap.2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.shadow.stroke.cap.2</h1>
+<p class="desc">Shadows are drawn for stroke caps</p>
+
+
+<script>
+var t = async_test("Shadows are drawn for stroke caps");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#f00';
+ctx.shadowColor = '#0f0';
+ctx.shadowOffsetY = 50;
+ctx.beginPath();
+ctx.lineWidth = 50;
+ctx.lineCap = 'square';
+ctx.moveTo(25, -25);
+ctx.lineTo(75, -25);
+ctx.stroke();
+_assertPixel(canvas, 1,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 98,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.stroke.cap.2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.stroke.cap.2.worker.js
new file mode 100644
index 0000000000..7c7dc26dd9
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.stroke.cap.2.worker.js
@@ -0,0 +1,36 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.shadow.stroke.cap.2
+// Description:Shadows are drawn for stroke caps
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Shadows are drawn for stroke caps");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#f00';
+ctx.shadowColor = '#0f0';
+ctx.shadowOffsetY = 50;
+ctx.beginPath();
+ctx.lineWidth = 50;
+ctx.lineCap = 'square';
+ctx.moveTo(25, -25);
+ctx.lineTo(75, -25);
+ctx.stroke();
+_assertPixel(canvas, 1,25, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 98,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.stroke.join.1.html b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.stroke.join.1.html
new file mode 100644
index 0000000000..8faa2fef08
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.stroke.join.1.html
@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.shadow.stroke.join.1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.shadow.stroke.join.1</h1>
+<p class="desc">Shadows are not drawn for areas outside stroke joins</p>
+
+
+<script>
+var t = async_test("Shadows are not drawn for areas outside stroke joins");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#f00';
+ctx.shadowColor = '#f00';
+ctx.shadowOffsetX = 100;
+ctx.lineWidth = 200;
+ctx.lineJoin = 'bevel';
+ctx.beginPath();
+ctx.moveTo(-200, -50);
+ctx.lineTo(-150, -50);
+ctx.lineTo(-151, -100);
+ctx.stroke();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 48,48, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.stroke.join.1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.stroke.join.1.worker.js
new file mode 100644
index 0000000000..e81a9b212d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.stroke.join.1.worker.js
@@ -0,0 +1,38 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.shadow.stroke.join.1
+// Description:Shadows are not drawn for areas outside stroke joins
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Shadows are not drawn for areas outside stroke joins");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#f00';
+ctx.shadowColor = '#f00';
+ctx.shadowOffsetX = 100;
+ctx.lineWidth = 200;
+ctx.lineJoin = 'bevel';
+ctx.beginPath();
+ctx.moveTo(-200, -50);
+ctx.lineTo(-150, -50);
+ctx.lineTo(-151, -100);
+ctx.stroke();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 48,48, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.stroke.join.2.html b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.stroke.join.2.html
new file mode 100644
index 0000000000..7b52a7c950
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.stroke.join.2.html
@@ -0,0 +1,44 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.shadow.stroke.join.2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.shadow.stroke.join.2</h1>
+<p class="desc">Shadows are drawn for stroke joins</p>
+
+
+<script>
+var t = async_test("Shadows are drawn for stroke joins");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 50, 50);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(50, 0, 50, 50);
+ctx.strokeStyle = '#f00';
+ctx.shadowColor = '#0f0';
+ctx.shadowOffsetX = 100;
+ctx.lineWidth = 200;
+ctx.lineJoin = 'miter';
+ctx.beginPath();
+ctx.moveTo(-200, -50);
+ctx.lineTo(-150, -50);
+ctx.lineTo(-151, -100);
+ctx.stroke();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 48,48, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.stroke.join.2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.stroke.join.2.worker.js
new file mode 100644
index 0000000000..269a49d76c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.stroke.join.2.worker.js
@@ -0,0 +1,40 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.shadow.stroke.join.2
+// Description:Shadows are drawn for stroke joins
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Shadows are drawn for stroke joins");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 50, 50);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(50, 0, 50, 50);
+ctx.strokeStyle = '#f00';
+ctx.shadowColor = '#0f0';
+ctx.shadowOffsetX = 100;
+ctx.lineWidth = 200;
+ctx.lineJoin = 'miter';
+ctx.beginPath();
+ctx.moveTo(-200, -50);
+ctx.lineTo(-150, -50);
+ctx.lineTo(-151, -100);
+ctx.stroke();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 48,48, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.stroke.join.3.html b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.stroke.join.3.html
new file mode 100644
index 0000000000..6110d3ae40
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.stroke.join.3.html
@@ -0,0 +1,43 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.shadow.stroke.join.3</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.shadow.stroke.join.3</h1>
+<p class="desc">Shadows are drawn for stroke joins respecting miter limit</p>
+
+
+<script>
+var t = async_test("Shadows are drawn for stroke joins respecting miter limit");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#f00';
+ctx.shadowColor = '#f00';
+ctx.shadowOffsetX = 100;
+ctx.lineWidth = 200;
+ctx.lineJoin = 'miter';
+ctx.miterLimit = 0.1;
+ctx.beginPath();
+ctx.moveTo(-200, -50);
+ctx.lineTo(-150, -50);
+ctx.lineTo(-151, -100); // (not an exact right angle, to avoid some other bug in Firefox 3)
+ctx.stroke();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 48,48, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.stroke.join.3.worker.js b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.stroke.join.3.worker.js
new file mode 100644
index 0000000000..43144b0fd9
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.stroke.join.3.worker.js
@@ -0,0 +1,39 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.shadow.stroke.join.3
+// Description:Shadows are drawn for stroke joins respecting miter limit
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Shadows are drawn for stroke joins respecting miter limit");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#f00';
+ctx.shadowColor = '#f00';
+ctx.shadowOffsetX = 100;
+ctx.lineWidth = 200;
+ctx.lineJoin = 'miter';
+ctx.miterLimit = 0.1;
+ctx.beginPath();
+ctx.moveTo(-200, -50);
+ctx.lineTo(-150, -50);
+ctx.lineTo(-151, -100); // (not an exact right angle, to avoid some other bug in Firefox 3)
+ctx.stroke();
+_assertPixel(canvas, 1,1, 0,255,0,255);
+_assertPixel(canvas, 48,48, 0,255,0,255);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 98,48, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.transform.1.html b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.transform.1.html
new file mode 100644
index 0000000000..d6c4e483ba
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.transform.1.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.shadow.transform.1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.shadow.transform.1</h1>
+<p class="desc">Shadows take account of transformations</p>
+
+
+<script>
+var t = async_test("Shadows take account of transformations");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.shadowOffsetY = 50;
+ctx.shadowColor = '#0f0';
+ctx.translate(100, 100);
+ctx.fillRect(-100, -150, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.transform.1.worker.js b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.transform.1.worker.js
new file mode 100644
index 0000000000..38cdf7eb7c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.transform.1.worker.js
@@ -0,0 +1,29 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.shadow.transform.1
+// Description:Shadows take account of transformations
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Shadows take account of transformations");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.shadowOffsetY = 50;
+ctx.shadowColor = '#0f0';
+ctx.translate(100, 100);
+ctx.fillRect(-100, -150, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.transform.2.html b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.transform.2.html
new file mode 100644
index 0000000000..f0b1607262
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.transform.2.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.shadow.transform.2</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.shadow.transform.2</h1>
+<p class="desc">Shadow offsets are not affected by transformations</p>
+
+
+<script>
+var t = async_test("Shadow offsets are not affected by transformations");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.shadowOffsetY = 50;
+ctx.shadowColor = '#0f0';
+ctx.rotate(Math.PI)
+ctx.fillRect(-100, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.transform.2.worker.js b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.transform.2.worker.js
new file mode 100644
index 0000000000..9f204d2439
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/shadows/2d.shadow.transform.2.worker.js
@@ -0,0 +1,29 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.shadow.transform.2
+// Description:Shadow offsets are not affected by transformations
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Shadow offsets are not affected by transformations");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.shadowOffsetY = 50;
+ctx.shadowColor = '#0f0';
+ctx.rotate(Math.PI)
+ctx.fillRect(-100, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.align.default.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.align.default.html
new file mode 100644
index 0000000000..fda5ee496d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.align.default.html
@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.align.default</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.align.default</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertSame(ctx.textAlign, 'start', "ctx.textAlign", "'start'");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.align.default.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.align.default.worker.js
new file mode 100644
index 0000000000..b2c940fac6
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.align.default.worker.js
@@ -0,0 +1,23 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.align.default
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertSame(ctx.textAlign, 'start', "ctx.textAlign", "'start'");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.align.invalid.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.align.invalid.html
new file mode 100644
index 0000000000..8b6f409a3d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.align.invalid.html
@@ -0,0 +1,41 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.align.invalid</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.align.invalid</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.textAlign = 'start';
+ctx.textAlign = 'bogus';
+_assertSame(ctx.textAlign, 'start', "ctx.textAlign", "'start'");
+
+ctx.textAlign = 'start';
+ctx.textAlign = 'END';
+_assertSame(ctx.textAlign, 'start', "ctx.textAlign", "'start'");
+
+ctx.textAlign = 'start';
+ctx.textAlign = 'end ';
+_assertSame(ctx.textAlign, 'start', "ctx.textAlign", "'start'");
+
+ctx.textAlign = 'start';
+ctx.textAlign = 'end\0';
+_assertSame(ctx.textAlign, 'start', "ctx.textAlign", "'start'");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.align.invalid.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.align.invalid.worker.js
new file mode 100644
index 0000000000..60ad8faac9
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.align.invalid.worker.js
@@ -0,0 +1,37 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.align.invalid
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.textAlign = 'start';
+ctx.textAlign = 'bogus';
+_assertSame(ctx.textAlign, 'start', "ctx.textAlign", "'start'");
+
+ctx.textAlign = 'start';
+ctx.textAlign = 'END';
+_assertSame(ctx.textAlign, 'start', "ctx.textAlign", "'start'");
+
+ctx.textAlign = 'start';
+ctx.textAlign = 'end ';
+_assertSame(ctx.textAlign, 'start', "ctx.textAlign", "'start'");
+
+ctx.textAlign = 'start';
+ctx.textAlign = 'end\0';
+_assertSame(ctx.textAlign, 'start', "ctx.textAlign", "'start'");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.align.valid.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.align.valid.html
new file mode 100644
index 0000000000..a78b58edaa
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.align.valid.html
@@ -0,0 +1,40 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.align.valid</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.align.valid</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.textAlign = 'start';
+_assertSame(ctx.textAlign, 'start', "ctx.textAlign", "'start'");
+
+ctx.textAlign = 'end';
+_assertSame(ctx.textAlign, 'end', "ctx.textAlign", "'end'");
+
+ctx.textAlign = 'left';
+_assertSame(ctx.textAlign, 'left', "ctx.textAlign", "'left'");
+
+ctx.textAlign = 'right';
+_assertSame(ctx.textAlign, 'right', "ctx.textAlign", "'right'");
+
+ctx.textAlign = 'center';
+_assertSame(ctx.textAlign, 'center', "ctx.textAlign", "'center'");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.align.valid.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.align.valid.worker.js
new file mode 100644
index 0000000000..fdf1907585
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.align.valid.worker.js
@@ -0,0 +1,36 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.align.valid
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.textAlign = 'start';
+_assertSame(ctx.textAlign, 'start', "ctx.textAlign", "'start'");
+
+ctx.textAlign = 'end';
+_assertSame(ctx.textAlign, 'end', "ctx.textAlign", "'end'");
+
+ctx.textAlign = 'left';
+_assertSame(ctx.textAlign, 'left', "ctx.textAlign", "'left'");
+
+ctx.textAlign = 'right';
+_assertSame(ctx.textAlign, 'right', "ctx.textAlign", "'right'");
+
+ctx.textAlign = 'center';
+_assertSame(ctx.textAlign, 'center', "ctx.textAlign", "'center'");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.baseline.default.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.baseline.default.html
new file mode 100644
index 0000000000..8bd20c6f84
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.baseline.default.html
@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.baseline.default</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.baseline.default</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertSame(ctx.textBaseline, 'alphabetic', "ctx.textBaseline", "'alphabetic'");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.baseline.default.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.baseline.default.worker.js
new file mode 100644
index 0000000000..ea8693f0a0
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.baseline.default.worker.js
@@ -0,0 +1,23 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.baseline.default
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertSame(ctx.textBaseline, 'alphabetic', "ctx.textBaseline", "'alphabetic'");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.baseline.invalid.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.baseline.invalid.html
new file mode 100644
index 0000000000..a850ac146f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.baseline.invalid.html
@@ -0,0 +1,41 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.baseline.invalid</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.baseline.invalid</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.textBaseline = 'top';
+ctx.textBaseline = 'bogus';
+_assertSame(ctx.textBaseline, 'top', "ctx.textBaseline", "'top'");
+
+ctx.textBaseline = 'top';
+ctx.textBaseline = 'MIDDLE';
+_assertSame(ctx.textBaseline, 'top', "ctx.textBaseline", "'top'");
+
+ctx.textBaseline = 'top';
+ctx.textBaseline = 'middle ';
+_assertSame(ctx.textBaseline, 'top', "ctx.textBaseline", "'top'");
+
+ctx.textBaseline = 'top';
+ctx.textBaseline = 'middle\0';
+_assertSame(ctx.textBaseline, 'top', "ctx.textBaseline", "'top'");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.baseline.invalid.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.baseline.invalid.worker.js
new file mode 100644
index 0000000000..d4cdc858b2
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.baseline.invalid.worker.js
@@ -0,0 +1,37 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.baseline.invalid
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.textBaseline = 'top';
+ctx.textBaseline = 'bogus';
+_assertSame(ctx.textBaseline, 'top', "ctx.textBaseline", "'top'");
+
+ctx.textBaseline = 'top';
+ctx.textBaseline = 'MIDDLE';
+_assertSame(ctx.textBaseline, 'top', "ctx.textBaseline", "'top'");
+
+ctx.textBaseline = 'top';
+ctx.textBaseline = 'middle ';
+_assertSame(ctx.textBaseline, 'top', "ctx.textBaseline", "'top'");
+
+ctx.textBaseline = 'top';
+ctx.textBaseline = 'middle\0';
+_assertSame(ctx.textBaseline, 'top', "ctx.textBaseline", "'top'");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.baseline.valid.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.baseline.valid.html
new file mode 100644
index 0000000000..8fdc058844
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.baseline.valid.html
@@ -0,0 +1,43 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.baseline.valid</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.baseline.valid</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.textBaseline = 'top';
+_assertSame(ctx.textBaseline, 'top', "ctx.textBaseline", "'top'");
+
+ctx.textBaseline = 'hanging';
+_assertSame(ctx.textBaseline, 'hanging', "ctx.textBaseline", "'hanging'");
+
+ctx.textBaseline = 'middle';
+_assertSame(ctx.textBaseline, 'middle', "ctx.textBaseline", "'middle'");
+
+ctx.textBaseline = 'alphabetic';
+_assertSame(ctx.textBaseline, 'alphabetic', "ctx.textBaseline", "'alphabetic'");
+
+ctx.textBaseline = 'ideographic';
+_assertSame(ctx.textBaseline, 'ideographic', "ctx.textBaseline", "'ideographic'");
+
+ctx.textBaseline = 'bottom';
+_assertSame(ctx.textBaseline, 'bottom', "ctx.textBaseline", "'bottom'");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.baseline.valid.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.baseline.valid.worker.js
new file mode 100644
index 0000000000..62f6983ddb
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.baseline.valid.worker.js
@@ -0,0 +1,39 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.baseline.valid
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.textBaseline = 'top';
+_assertSame(ctx.textBaseline, 'top', "ctx.textBaseline", "'top'");
+
+ctx.textBaseline = 'hanging';
+_assertSame(ctx.textBaseline, 'hanging', "ctx.textBaseline", "'hanging'");
+
+ctx.textBaseline = 'middle';
+_assertSame(ctx.textBaseline, 'middle', "ctx.textBaseline", "'middle'");
+
+ctx.textBaseline = 'alphabetic';
+_assertSame(ctx.textBaseline, 'alphabetic', "ctx.textBaseline", "'alphabetic'");
+
+ctx.textBaseline = 'ideographic';
+_assertSame(ctx.textBaseline, 'ideographic', "ctx.textBaseline", "'ideographic'");
+
+ctx.textBaseline = 'bottom';
+_assertSame(ctx.textBaseline, 'bottom', "ctx.textBaseline", "'bottom'");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.align.center.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.align.center.html
new file mode 100644
index 0000000000..438e6756a0
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.align.center.html
@@ -0,0 +1,43 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.draw.align.center</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.draw.align.center</h1>
+<p class="desc">textAlign center is the center of the em squares (not the bounding box)</p>
+
+
+<script>
+var t = async_test("textAlign center is the center of the em squares (not the bounding box)");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '50px CanvasTest';
+ ctx.fillStyle = '#f00';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.fillStyle = '#0f0';
+ ctx.textAlign = 'center';
+ ctx.fillText('DD', 50, 37.5);
+ _assertPixelApprox(canvas, 5,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 5,45, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,45, 0,255,0,255, 2);
+ }).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.align.center.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.align.center.worker.js
new file mode 100644
index 0000000000..9487e6ab8e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.align.center.worker.js
@@ -0,0 +1,39 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.draw.align.center
+// Description:textAlign center is the center of the em squares (not the bounding box)
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("textAlign center is the center of the em squares (not the bounding box)");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '50px CanvasTest';
+ ctx.fillStyle = '#f00';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.fillStyle = '#0f0';
+ ctx.textAlign = 'center';
+ ctx.fillText('DD', 50, 37.5);
+ _assertPixelApprox(canvas, 5,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 5,45, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,45, 0,255,0,255, 2);
+ }).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.align.end.ltr.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.align.end.ltr.html
new file mode 100644
index 0000000000..6134042bdc
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.align.end.ltr.html
@@ -0,0 +1,44 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.draw.align.end.ltr</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.draw.align.end.ltr</h1>
+<p class="desc">textAlign end with ltr is the right edge</p>
+
+
+<script>
+var t = async_test("textAlign end with ltr is the right edge");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '50px CanvasTest';
+ ctx.direction = 'ltr';
+ ctx.fillStyle = '#f00';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.fillStyle = '#0f0';
+ ctx.textAlign = 'end';
+ ctx.fillText('DD', 100, 37.5);
+ _assertPixelApprox(canvas, 5,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 5,45, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,45, 0,255,0,255, 2);
+ }).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.align.end.ltr.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.align.end.ltr.worker.js
new file mode 100644
index 0000000000..2a7b9e9418
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.align.end.ltr.worker.js
@@ -0,0 +1,40 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.draw.align.end.ltr
+// Description:textAlign end with ltr is the right edge
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("textAlign end with ltr is the right edge");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '50px CanvasTest';
+ ctx.direction = 'ltr';
+ ctx.fillStyle = '#f00';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.fillStyle = '#0f0';
+ ctx.textAlign = 'end';
+ ctx.fillText('DD', 100, 37.5);
+ _assertPixelApprox(canvas, 5,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 5,45, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,45, 0,255,0,255, 2);
+ }).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.align.end.rtl.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.align.end.rtl.html
new file mode 100644
index 0000000000..a4b502480a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.align.end.rtl.html
@@ -0,0 +1,44 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.draw.align.end.rtl</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.draw.align.end.rtl</h1>
+<p class="desc">textAlign end with rtl is the left edge</p>
+
+
+<script>
+var t = async_test("textAlign end with rtl is the left edge");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '50px CanvasTest';
+ ctx.direction = 'rtl';
+ ctx.fillStyle = '#f00';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.fillStyle = '#0f0';
+ ctx.textAlign = 'end';
+ ctx.fillText('DD', 0, 37.5);
+ _assertPixelApprox(canvas, 5,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 5,45, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,45, 0,255,0,255, 2);
+ }).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.align.end.rtl.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.align.end.rtl.worker.js
new file mode 100644
index 0000000000..deb8227ec4
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.align.end.rtl.worker.js
@@ -0,0 +1,40 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.draw.align.end.rtl
+// Description:textAlign end with rtl is the left edge
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("textAlign end with rtl is the left edge");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '50px CanvasTest';
+ ctx.direction = 'rtl';
+ ctx.fillStyle = '#f00';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.fillStyle = '#0f0';
+ ctx.textAlign = 'end';
+ ctx.fillText('DD', 0, 37.5);
+ _assertPixelApprox(canvas, 5,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 5,45, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,45, 0,255,0,255, 2);
+ }).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.align.left.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.align.left.html
new file mode 100644
index 0000000000..6e69a830a4
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.align.left.html
@@ -0,0 +1,43 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.draw.align.left</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.draw.align.left</h1>
+<p class="desc">textAlign left is the left of the first em square (not the bounding box)</p>
+
+
+<script>
+var t = async_test("textAlign left is the left of the first em square (not the bounding box)");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '50px CanvasTest';
+ ctx.fillStyle = '#f00';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.fillStyle = '#0f0';
+ ctx.textAlign = 'left';
+ ctx.fillText('DD', 0, 37.5);
+ _assertPixelApprox(canvas, 5,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 5,45, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,45, 0,255,0,255, 2);
+ }).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.align.left.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.align.left.worker.js
new file mode 100644
index 0000000000..9c55512653
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.align.left.worker.js
@@ -0,0 +1,39 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.draw.align.left
+// Description:textAlign left is the left of the first em square (not the bounding box)
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("textAlign left is the left of the first em square (not the bounding box)");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '50px CanvasTest';
+ ctx.fillStyle = '#f00';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.fillStyle = '#0f0';
+ ctx.textAlign = 'left';
+ ctx.fillText('DD', 0, 37.5);
+ _assertPixelApprox(canvas, 5,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 5,45, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,45, 0,255,0,255, 2);
+ }).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.align.right.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.align.right.html
new file mode 100644
index 0000000000..a56c7cab1d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.align.right.html
@@ -0,0 +1,43 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.draw.align.right</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.draw.align.right</h1>
+<p class="desc">textAlign right is the right of the last em square (not the bounding box)</p>
+
+
+<script>
+var t = async_test("textAlign right is the right of the last em square (not the bounding box)");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '50px CanvasTest';
+ ctx.fillStyle = '#f00';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.fillStyle = '#0f0';
+ ctx.textAlign = 'right';
+ ctx.fillText('DD', 100, 37.5);
+ _assertPixelApprox(canvas, 5,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 5,45, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,45, 0,255,0,255, 2);
+ }).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.align.right.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.align.right.worker.js
new file mode 100644
index 0000000000..f246963f60
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.align.right.worker.js
@@ -0,0 +1,39 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.draw.align.right
+// Description:textAlign right is the right of the last em square (not the bounding box)
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("textAlign right is the right of the last em square (not the bounding box)");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '50px CanvasTest';
+ ctx.fillStyle = '#f00';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.fillStyle = '#0f0';
+ ctx.textAlign = 'right';
+ ctx.fillText('DD', 100, 37.5);
+ _assertPixelApprox(canvas, 5,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 5,45, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,45, 0,255,0,255, 2);
+ }).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.align.start.ltr.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.align.start.ltr.html
new file mode 100644
index 0000000000..ba8c440c43
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.align.start.ltr.html
@@ -0,0 +1,44 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.draw.align.start.ltr</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.draw.align.start.ltr</h1>
+<p class="desc">textAlign start with ltr is the left edge</p>
+
+
+<script>
+var t = async_test("textAlign start with ltr is the left edge");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '50px CanvasTest';
+ ctx.direction = 'ltr';
+ ctx.fillStyle = '#f00';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.fillStyle = '#0f0';
+ ctx.textAlign = 'start';
+ ctx.fillText('DD', 0, 37.5);
+ _assertPixelApprox(canvas, 5,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 5,45, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,45, 0,255,0,255, 2);
+ }).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.align.start.ltr.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.align.start.ltr.worker.js
new file mode 100644
index 0000000000..2de9d50fab
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.align.start.ltr.worker.js
@@ -0,0 +1,40 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.draw.align.start.ltr
+// Description:textAlign start with ltr is the left edge
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("textAlign start with ltr is the left edge");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '50px CanvasTest';
+ ctx.direction = 'ltr';
+ ctx.fillStyle = '#f00';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.fillStyle = '#0f0';
+ ctx.textAlign = 'start';
+ ctx.fillText('DD', 0, 37.5);
+ _assertPixelApprox(canvas, 5,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 5,45, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,45, 0,255,0,255, 2);
+ }).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.align.start.rtl.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.align.start.rtl.html
new file mode 100644
index 0000000000..32f83430e0
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.align.start.rtl.html
@@ -0,0 +1,44 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.draw.align.start.rtl</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.draw.align.start.rtl</h1>
+<p class="desc">textAlign start with rtl is the right edge</p>
+
+
+<script>
+var t = async_test("textAlign start with rtl is the right edge");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '50px CanvasTest';
+ ctx.direction = 'rtl';
+ ctx.fillStyle = '#f00';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.fillStyle = '#0f0';
+ ctx.textAlign = 'start';
+ ctx.fillText('DD', 100, 37.5);
+ _assertPixelApprox(canvas, 5,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 5,45, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,45, 0,255,0,255, 2);
+ }).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.align.start.rtl.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.align.start.rtl.worker.js
new file mode 100644
index 0000000000..41cb57b958
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.align.start.rtl.worker.js
@@ -0,0 +1,40 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.draw.align.start.rtl
+// Description:textAlign start with rtl is the right edge
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("textAlign start with rtl is the right edge");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '50px CanvasTest';
+ ctx.direction = 'rtl';
+ ctx.fillStyle = '#f00';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.fillStyle = '#0f0';
+ ctx.textAlign = 'start';
+ ctx.fillText('DD', 100, 37.5);
+ _assertPixelApprox(canvas, 5,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 5,45, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,45, 0,255,0,255, 2);
+ }).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.baseline.alphabetic.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.baseline.alphabetic.html
new file mode 100644
index 0000000000..bd6a1804a5
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.baseline.alphabetic.html
@@ -0,0 +1,43 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.draw.baseline.alphabetic</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.draw.baseline.alphabetic</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '50px CanvasTest';
+ ctx.fillStyle = '#f00';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.fillStyle = '#0f0';
+ ctx.textBaseline = 'alphabetic';
+ ctx.fillText('CC', 0, 37.5);
+ _assertPixelApprox(canvas, 5,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 5,45, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,45, 0,255,0,255, 2);
+ }).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.baseline.alphabetic.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.baseline.alphabetic.worker.js
new file mode 100644
index 0000000000..5b4fe08b13
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.baseline.alphabetic.worker.js
@@ -0,0 +1,39 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.draw.baseline.alphabetic
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '50px CanvasTest';
+ ctx.fillStyle = '#f00';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.fillStyle = '#0f0';
+ ctx.textBaseline = 'alphabetic';
+ ctx.fillText('CC', 0, 37.5);
+ _assertPixelApprox(canvas, 5,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 5,45, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,45, 0,255,0,255, 2);
+ }).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.baseline.bottom.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.baseline.bottom.html
new file mode 100644
index 0000000000..4e5fc8e346
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.baseline.bottom.html
@@ -0,0 +1,43 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.draw.baseline.bottom</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.draw.baseline.bottom</h1>
+<p class="desc">textBaseline bottom is the bottom of the em square (not the bounding box)</p>
+
+
+<script>
+var t = async_test("textBaseline bottom is the bottom of the em square (not the bounding box)");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '50px CanvasTest';
+ ctx.fillStyle = '#f00';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.fillStyle = '#0f0';
+ ctx.textBaseline = 'bottom';
+ ctx.fillText('CC', 0, 50);
+ _assertPixelApprox(canvas, 5,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 5,45, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,45, 0,255,0,255, 2);
+ }).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.baseline.bottom.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.baseline.bottom.worker.js
new file mode 100644
index 0000000000..1c7cab3ef9
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.baseline.bottom.worker.js
@@ -0,0 +1,39 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.draw.baseline.bottom
+// Description:textBaseline bottom is the bottom of the em square (not the bounding box)
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("textBaseline bottom is the bottom of the em square (not the bounding box)");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '50px CanvasTest';
+ ctx.fillStyle = '#f00';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.fillStyle = '#0f0';
+ ctx.textBaseline = 'bottom';
+ ctx.fillText('CC', 0, 50);
+ _assertPixelApprox(canvas, 5,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 5,45, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,45, 0,255,0,255, 2);
+ }).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.baseline.hanging.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.baseline.hanging.html
new file mode 100644
index 0000000000..d0d573790d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.baseline.hanging.html
@@ -0,0 +1,43 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.draw.baseline.hanging</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.draw.baseline.hanging</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '50px CanvasTest';
+ ctx.fillStyle = '#f00';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.fillStyle = '#0f0';
+ ctx.textBaseline = 'hanging';
+ ctx.fillText('CC', 0, 12.5);
+ _assertPixelApprox(canvas, 5,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 5,45, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,45, 0,255,0,255, 2);
+ }).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.baseline.hanging.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.baseline.hanging.worker.js
new file mode 100644
index 0000000000..79df7d8e48
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.baseline.hanging.worker.js
@@ -0,0 +1,39 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.draw.baseline.hanging
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '50px CanvasTest';
+ ctx.fillStyle = '#f00';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.fillStyle = '#0f0';
+ ctx.textBaseline = 'hanging';
+ ctx.fillText('CC', 0, 12.5);
+ _assertPixelApprox(canvas, 5,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 5,45, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,45, 0,255,0,255, 2);
+ }).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.baseline.ideographic.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.baseline.ideographic.html
new file mode 100644
index 0000000000..144d56f784
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.baseline.ideographic.html
@@ -0,0 +1,43 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.draw.baseline.ideographic</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.draw.baseline.ideographic</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '50px CanvasTest';
+ ctx.fillStyle = '#f00';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.fillStyle = '#0f0';
+ ctx.textBaseline = 'ideographic';
+ ctx.fillText('CC', 0, 31.25);
+ _assertPixelApprox(canvas, 5,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 5,45, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,45, 0,255,0,255, 2);
+ }).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.baseline.ideographic.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.baseline.ideographic.worker.js
new file mode 100644
index 0000000000..ef7d0180cd
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.baseline.ideographic.worker.js
@@ -0,0 +1,39 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.draw.baseline.ideographic
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '50px CanvasTest';
+ ctx.fillStyle = '#f00';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.fillStyle = '#0f0';
+ ctx.textBaseline = 'ideographic';
+ ctx.fillText('CC', 0, 31.25);
+ _assertPixelApprox(canvas, 5,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 5,45, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,45, 0,255,0,255, 2);
+ }).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.baseline.middle.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.baseline.middle.html
new file mode 100644
index 0000000000..3072264bb4
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.baseline.middle.html
@@ -0,0 +1,43 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.draw.baseline.middle</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.draw.baseline.middle</h1>
+<p class="desc">textBaseline middle is the middle of the em square (not the bounding box)</p>
+
+
+<script>
+var t = async_test("textBaseline middle is the middle of the em square (not the bounding box)");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '50px CanvasTest';
+ ctx.fillStyle = '#f00';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.fillStyle = '#0f0';
+ ctx.textBaseline = 'middle';
+ ctx.fillText('CC', 0, 25);
+ _assertPixelApprox(canvas, 5,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 5,45, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,45, 0,255,0,255, 2);
+ }).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.baseline.middle.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.baseline.middle.worker.js
new file mode 100644
index 0000000000..a0509b6711
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.baseline.middle.worker.js
@@ -0,0 +1,39 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.draw.baseline.middle
+// Description:textBaseline middle is the middle of the em square (not the bounding box)
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("textBaseline middle is the middle of the em square (not the bounding box)");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '50px CanvasTest';
+ ctx.fillStyle = '#f00';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.fillStyle = '#0f0';
+ ctx.textBaseline = 'middle';
+ ctx.fillText('CC', 0, 25);
+ _assertPixelApprox(canvas, 5,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 5,45, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,45, 0,255,0,255, 2);
+ }).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.baseline.top.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.baseline.top.html
new file mode 100644
index 0000000000..a077aff348
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.baseline.top.html
@@ -0,0 +1,43 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.draw.baseline.top</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.draw.baseline.top</h1>
+<p class="desc">textBaseline top is the top of the em square (not the bounding box)</p>
+
+
+<script>
+var t = async_test("textBaseline top is the top of the em square (not the bounding box)");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '50px CanvasTest';
+ ctx.fillStyle = '#f00';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.fillStyle = '#0f0';
+ ctx.textBaseline = 'top';
+ ctx.fillText('CC', 0, 0);
+ _assertPixelApprox(canvas, 5,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 5,45, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,45, 0,255,0,255, 2);
+ }).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.baseline.top.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.baseline.top.worker.js
new file mode 100644
index 0000000000..bbc7fc06a3
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.baseline.top.worker.js
@@ -0,0 +1,39 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.draw.baseline.top
+// Description:textBaseline top is the top of the em square (not the bounding box)
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("textBaseline top is the top of the em square (not the bounding box)");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '50px CanvasTest';
+ ctx.fillStyle = '#f00';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.fillStyle = '#0f0';
+ ctx.textBaseline = 'top';
+ ctx.fillText('CC', 0, 0);
+ _assertPixelApprox(canvas, 5,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 5,45, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,45, 0,255,0,255, 2);
+ }).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.basic-manual.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.basic-manual.html
new file mode 100644
index 0000000000..5c364f58a6
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.basic-manual.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.draw.fill.basic</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.draw.fill.basic</h1>
+<p class="desc">fillText draws filled text</p>
+
+
+<script>
+var t = async_test("fillText draws filled text");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#000';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.strokeStyle = '#f00';
+ctx.font = '35px Arial, sans-serif';
+ctx.fillText('PASS', 5, 35);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.basic-manual.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.basic-manual.worker.js
new file mode 100644
index 0000000000..b75be08977
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.basic-manual.worker.js
@@ -0,0 +1,28 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.draw.fill.basic
+// Description:fillText draws filled text
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("fillText draws filled text");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#000';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.strokeStyle = '#f00';
+ctx.font = '35px Arial, sans-serif';
+ctx.fillText('PASS', 5, 35);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.basic.png b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.basic.png
new file mode 100644
index 0000000000..70d7b046cb
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.basic.png
Binary files differ
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.maxWidth.NaN.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.maxWidth.NaN.html
new file mode 100644
index 0000000000..4bef0e3d70
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.maxWidth.NaN.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.draw.fill.maxWidth.NaN</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.draw.fill.maxWidth.NaN</h1>
+<p class="desc">fillText handles maxWidth correctly</p>
+
+
+<script>
+var t = async_test("fillText handles maxWidth correctly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.font = '35px Arial, sans-serif';
+ctx.fillText('fail fail fail fail fail', 5, 35, NaN);
+_assertGreen(ctx, 100, 50);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.maxWidth.NaN.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.maxWidth.NaN.worker.js
new file mode 100644
index 0000000000..32a673f495
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.maxWidth.NaN.worker.js
@@ -0,0 +1,28 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.draw.fill.maxWidth.NaN
+// Description:fillText handles maxWidth correctly
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("fillText handles maxWidth correctly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.font = '35px Arial, sans-serif';
+ctx.fillText('fail fail fail fail fail', 5, 35, NaN);
+_assertGreen(ctx, 100, 50);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.maxWidth.bound.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.maxWidth.bound.html
new file mode 100644
index 0000000000..63b30966f4
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.maxWidth.bound.html
@@ -0,0 +1,40 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.draw.fill.maxWidth.bound</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.draw.fill.maxWidth.bound</h1>
+<p class="desc">fillText handles maxWidth based on line size, not bounding box size</p>
+
+
+<script>
+var t = async_test("fillText handles maxWidth based on line size, not bounding box size");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '50px CanvasTest';
+ ctx.fillStyle = '#f00';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.fillStyle = '#0f0';
+ ctx.fillText('DD', 0, 37.5, 100);
+ _assertPixelApprox(canvas, 5,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+ }).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.maxWidth.bound.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.maxWidth.bound.worker.js
new file mode 100644
index 0000000000..092289baf4
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.maxWidth.bound.worker.js
@@ -0,0 +1,36 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.draw.fill.maxWidth.bound
+// Description:fillText handles maxWidth based on line size, not bounding box size
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("fillText handles maxWidth based on line size, not bounding box size");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '50px CanvasTest';
+ ctx.fillStyle = '#f00';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.fillStyle = '#0f0';
+ ctx.fillText('DD', 0, 37.5, 100);
+ _assertPixelApprox(canvas, 5,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+ }).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.maxWidth.fontface.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.maxWidth.fontface.html
new file mode 100644
index 0000000000..9294bf9973
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.maxWidth.fontface.html
@@ -0,0 +1,40 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.draw.fill.maxWidth.fontface</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.draw.fill.maxWidth.fontface</h1>
+<p class="desc">fillText works on @font-face fonts</p>
+
+
+<script>
+var t = async_test("fillText works on @font-face fonts");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '50px CanvasTest';
+ ctx.fillStyle = '#0f0';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.fillStyle = '#f00';
+ ctx.fillText('EEEE', -50, 37.5, 40);
+ _assertPixelApprox(canvas, 5,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+ }).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.maxWidth.fontface.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.maxWidth.fontface.worker.js
new file mode 100644
index 0000000000..99cc25e7ae
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.maxWidth.fontface.worker.js
@@ -0,0 +1,36 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.draw.fill.maxWidth.fontface
+// Description:fillText works on @font-face fonts
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("fillText works on @font-face fonts");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '50px CanvasTest';
+ ctx.fillStyle = '#0f0';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.fillStyle = '#f00';
+ ctx.fillText('EEEE', -50, 37.5, 40);
+ _assertPixelApprox(canvas, 5,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+ }).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.maxWidth.large-manual.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.maxWidth.large-manual.html
new file mode 100644
index 0000000000..838b3f83ee
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.maxWidth.large-manual.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.draw.fill.maxWidth.large</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.draw.fill.maxWidth.large</h1>
+<p class="desc">fillText handles maxWidth correctly</p>
+
+
+<script>
+var t = async_test("fillText handles maxWidth correctly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#000';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.font = '35px Arial, sans-serif';
+ctx.fillText('PASS', 5, 35, 200);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.maxWidth.large-manual.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.maxWidth.large-manual.worker.js
new file mode 100644
index 0000000000..e124b08ebc
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.maxWidth.large-manual.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.draw.fill.maxWidth.large
+// Description:fillText handles maxWidth correctly
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("fillText handles maxWidth correctly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#000';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.font = '35px Arial, sans-serif';
+ctx.fillText('PASS', 5, 35, 200);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.maxWidth.large.png b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.maxWidth.large.png
new file mode 100644
index 0000000000..70d7b046cb
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.maxWidth.large.png
Binary files differ
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.maxWidth.negative.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.maxWidth.negative.html
new file mode 100644
index 0000000000..9d06556736
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.maxWidth.negative.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.draw.fill.maxWidth.negative</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.draw.fill.maxWidth.negative</h1>
+<p class="desc">fillText handles maxWidth correctly</p>
+
+
+<script>
+var t = async_test("fillText handles maxWidth correctly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.font = '35px Arial, sans-serif';
+ctx.fillText('fail fail fail fail fail', 5, 35, -1);
+_assertGreen(ctx, 100, 50);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.maxWidth.negative.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.maxWidth.negative.worker.js
new file mode 100644
index 0000000000..bf852bc54d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.maxWidth.negative.worker.js
@@ -0,0 +1,28 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.draw.fill.maxWidth.negative
+// Description:fillText handles maxWidth correctly
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("fillText handles maxWidth correctly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.font = '35px Arial, sans-serif';
+ctx.fillText('fail fail fail fail fail', 5, 35, -1);
+_assertGreen(ctx, 100, 50);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.maxWidth.small.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.maxWidth.small.html
new file mode 100644
index 0000000000..37c137eab5
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.maxWidth.small.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.draw.fill.maxWidth.small</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.draw.fill.maxWidth.small</h1>
+<p class="desc">fillText handles maxWidth correctly</p>
+
+
+<script>
+var t = async_test("fillText handles maxWidth correctly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.font = '35px Arial, sans-serif';
+ctx.fillText('fail fail fail fail fail', -100, 35, 90);
+_assertGreen(ctx, 100, 50);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.maxWidth.small.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.maxWidth.small.worker.js
new file mode 100644
index 0000000000..44cf210e1e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.maxWidth.small.worker.js
@@ -0,0 +1,28 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.draw.fill.maxWidth.small
+// Description:fillText handles maxWidth correctly
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("fillText handles maxWidth correctly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.font = '35px Arial, sans-serif';
+ctx.fillText('fail fail fail fail fail', -100, 35, 90);
+_assertGreen(ctx, 100, 50);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.maxWidth.zero.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.maxWidth.zero.html
new file mode 100644
index 0000000000..c5bec91f9d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.maxWidth.zero.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.draw.fill.maxWidth.zero</title>
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.draw.fill.maxWidth.zero</h1>
+<p class="desc">fillText handles maxWidth correctly</p>
+
+
+<script>
+var t = async_test("fillText handles maxWidth correctly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.font = '35px Arial, sans-serif';
+ctx.fillText('fail fail fail fail fail', 5, 35, 0);
+_assertGreen(ctx, 100, 50);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.maxWidth.zero.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.maxWidth.zero.worker.js
new file mode 100644
index 0000000000..6701f5b8dc
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.maxWidth.zero.worker.js
@@ -0,0 +1,29 @@
+// META: timeout=long
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.draw.fill.maxWidth.zero
+// Description:fillText handles maxWidth correctly
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("fillText handles maxWidth correctly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.font = '35px Arial, sans-serif';
+ctx.fillText('fail fail fail fail fail', 5, 35, 0);
+_assertGreen(ctx, 100, 50);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.rtl-manual.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.rtl-manual.html
new file mode 100644
index 0000000000..7363d734cc
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.rtl-manual.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.draw.fill.rtl</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.draw.fill.rtl</h1>
+<p class="desc">fillText respects Right-To-Left Override characters</p>
+
+
+<script>
+var t = async_test("fillText respects Right-To-Left Override characters");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#000';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.strokeStyle = '#f00';
+ctx.font = '35px Arial, sans-serif';
+ctx.fillText('\u202eFAIL \xa0 \xa0 SSAP', 5, 35);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.rtl-manual.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.rtl-manual.worker.js
new file mode 100644
index 0000000000..f52a0cc617
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.rtl-manual.worker.js
@@ -0,0 +1,28 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.draw.fill.rtl
+// Description:fillText respects Right-To-Left Override characters
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("fillText respects Right-To-Left Override characters");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#000';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#0f0';
+ctx.strokeStyle = '#f00';
+ctx.font = '35px Arial, sans-serif';
+ctx.fillText('\u202eFAIL \xa0 \xa0 SSAP', 5, 35);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.rtl.png b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.rtl.png
new file mode 100644
index 0000000000..70d7b046cb
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.rtl.png
Binary files differ
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.unaffected.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.unaffected.html
new file mode 100644
index 0000000000..e620ae1a18
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.unaffected.html
@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.draw.fill.unaffected</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.draw.fill.unaffected</h1>
+<p class="desc">fillText does not start a new path or subpath</p>
+
+
+<script>
+var t = async_test("fillText does not start a new path or subpath");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+
+ctx.moveTo(0, 0);
+ctx.lineTo(100, 0);
+
+ctx.font = '35px Arial, sans-serif';
+ctx.fillText('FAIL', 5, 35);
+
+ctx.lineTo(100, 50);
+ctx.lineTo(0, 50);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 5,45, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.unaffected.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.unaffected.worker.js
new file mode 100644
index 0000000000..9640bad6c9
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fill.unaffected.worker.js
@@ -0,0 +1,38 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.draw.fill.unaffected
+// Description:fillText does not start a new path or subpath
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("fillText does not start a new path or subpath");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+
+ctx.moveTo(0, 0);
+ctx.lineTo(100, 0);
+
+ctx.font = '35px Arial, sans-serif';
+ctx.fillText('FAIL', 5, 35);
+
+ctx.lineTo(100, 50);
+ctx.lineTo(0, 50);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 5,45, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fontface.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fontface.html
new file mode 100644
index 0000000000..d2c65e8bb2
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fontface.html
@@ -0,0 +1,40 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.draw.fontface</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.draw.fontface</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '67px CanvasTest';
+ ctx.fillStyle = '#f00';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.fillStyle = '#0f0';
+ ctx.fillText('AA', 0, 50);
+ _assertPixelApprox(canvas, 5,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+ }).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fontface.notinpage.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fontface.notinpage.html
new file mode 100644
index 0000000000..f390700ea0
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fontface.notinpage.html
@@ -0,0 +1,40 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.draw.fontface.notinpage</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.draw.fontface.notinpage</h1>
+<p class="desc">@font-face fonts should work even if they are not used in the page</p>
+
+
+<script>
+var t = async_test("@font-face fonts should work even if they are not used in the page");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '67px CanvasTest';
+ ctx.fillStyle = '#f00';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.fillStyle = '#0f0';
+ ctx.fillText('AA', 0, 50);
+ _assertPixelApprox(canvas, 5,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+ }).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fontface.notinpage.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fontface.notinpage.worker.js
new file mode 100644
index 0000000000..8efab418a8
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fontface.notinpage.worker.js
@@ -0,0 +1,36 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.draw.fontface.notinpage
+// Description:@font-face fonts should work even if they are not used in the page
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("@font-face fonts should work even if they are not used in the page");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '67px CanvasTest';
+ ctx.fillStyle = '#f00';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.fillStyle = '#0f0';
+ ctx.fillText('AA', 0, 50);
+ _assertPixelApprox(canvas, 5,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+ }).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fontface.repeat.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fontface.repeat.html
new file mode 100644
index 0000000000..3766ab6989
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fontface.repeat.html
@@ -0,0 +1,41 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.draw.fontface.repeat</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.draw.fontface.repeat</h1>
+<p class="desc">Draw with the font immediately, then wait a bit until and draw again. (This crashes some version of WebKit.)</p>
+
+
+<script>
+var t = async_test("Draw with the font immediately, then wait a bit until and draw again. (This crashes some version of WebKit.)");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.fillStyle = '#f00';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.font = '67px CanvasTest';
+ ctx.fillStyle = '#0f0';
+ ctx.fillText('AA', 0, 50);
+ ctx.fillText('AA', 0, 50);
+ _assertPixelApprox(canvas, 5,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+ }).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fontface.repeat.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fontface.repeat.worker.js
new file mode 100644
index 0000000000..756e844709
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fontface.repeat.worker.js
@@ -0,0 +1,37 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.draw.fontface.repeat
+// Description:Draw with the font immediately, then wait a bit until and draw again. (This crashes some version of WebKit.)
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Draw with the font immediately, then wait a bit until and draw again. (This crashes some version of WebKit.)");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.fillStyle = '#f00';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.font = '67px CanvasTest';
+ ctx.fillStyle = '#0f0';
+ ctx.fillText('AA', 0, 50);
+ ctx.fillText('AA', 0, 50);
+ _assertPixelApprox(canvas, 5,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+ }).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fontface.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fontface.worker.js
new file mode 100644
index 0000000000..45f18317b0
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.fontface.worker.js
@@ -0,0 +1,36 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.draw.fontface
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '67px CanvasTest';
+ ctx.fillStyle = '#f00';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.fillStyle = '#0f0';
+ ctx.fillText('AA', 0, 50);
+ _assertPixelApprox(canvas, 5,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 95,5, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+ }).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.kern.consistent-manual.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.kern.consistent-manual.html
new file mode 100644
index 0000000000..e8ee39c655
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.kern.consistent-manual.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.draw.kern.consistent</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.draw.kern.consistent</h1>
+<p class="desc">Stroked and filled text should have exactly the same kerning so it overlaps</p>
+
+
+<script>
+var t = async_test("Stroked and filled text should have exactly the same kerning so it overlaps");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 3;
+ctx.font = '20px Arial, sans-serif';
+ctx.fillText('VAVAVAVAVAVAVA', -50, 25);
+ctx.fillText('ToToToToToToTo', -50, 45);
+ctx.strokeText('VAVAVAVAVAVAVA', -50, 25);
+ctx.strokeText('ToToToToToToTo', -50, 45);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.kern.consistent-manual.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.kern.consistent-manual.worker.js
new file mode 100644
index 0000000000..464cab3ea5
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.kern.consistent-manual.worker.js
@@ -0,0 +1,32 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.draw.kern.consistent
+// Description:Stroked and filled text should have exactly the same kerning so it overlaps
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Stroked and filled text should have exactly the same kerning so it overlaps");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.strokeStyle = '#0f0';
+ctx.lineWidth = 3;
+ctx.font = '20px Arial, sans-serif';
+ctx.fillText('VAVAVAVAVAVAVA', -50, 25);
+ctx.fillText('ToToToToToToTo', -50, 45);
+ctx.strokeText('VAVAVAVAVAVAVA', -50, 25);
+ctx.strokeText('ToToToToToToTo', -50, 45);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.space.basic.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.space.basic.html
new file mode 100644
index 0000000000..4bc03bb4ad
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.space.basic.html
@@ -0,0 +1,38 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.draw.space.basic</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.draw.space.basic</h1>
+<p class="desc">U+0020 is rendered the correct size (1em wide)</p>
+
+
+<script>
+var t = async_test("U+0020 is rendered the correct size (1em wide)");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '50px CanvasTest';
+ ctx.fillStyle = '#f00';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.fillStyle = '#0f0';
+ ctx.fillText('E EE', -100, 37.5);
+ _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+ }).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.space.basic.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.space.basic.worker.js
new file mode 100644
index 0000000000..39c00846e9
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.space.basic.worker.js
@@ -0,0 +1,34 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.draw.space.basic
+// Description:U+0020 is rendered the correct size (1em wide)
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("U+0020 is rendered the correct size (1em wide)");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '50px CanvasTest';
+ ctx.fillStyle = '#f00';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.fillStyle = '#0f0';
+ ctx.fillText('E EE', -100, 37.5);
+ _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+ }).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.space.collapse.end.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.space.collapse.end.html
new file mode 100644
index 0000000000..58fb292e13
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.space.collapse.end.html
@@ -0,0 +1,39 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.draw.space.collapse.end</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.draw.space.collapse.end</h1>
+<p class="desc">Space characters at the end of a line are collapsed (per CSS)</p>
+
+
+<script>
+var t = async_test("Space characters at the end of a line are collapsed (per CSS)");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '50px CanvasTest';
+ ctx.fillStyle = '#f00';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.fillStyle = '#0f0';
+ ctx.textAlign = 'right';
+ ctx.fillText('EE ', 100, 37.5);
+ _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+ }).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.space.collapse.end.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.space.collapse.end.worker.js
new file mode 100644
index 0000000000..81f85baff0
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.space.collapse.end.worker.js
@@ -0,0 +1,35 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.draw.space.collapse.end
+// Description:Space characters at the end of a line are collapsed (per CSS)
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Space characters at the end of a line are collapsed (per CSS)");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '50px CanvasTest';
+ ctx.fillStyle = '#f00';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.fillStyle = '#0f0';
+ ctx.textAlign = 'right';
+ ctx.fillText('EE ', 100, 37.5);
+ _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+ }).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.space.collapse.nonspace.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.space.collapse.nonspace.html
new file mode 100644
index 0000000000..f018dc1465
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.space.collapse.nonspace.html
@@ -0,0 +1,38 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.draw.space.collapse.nonspace</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.draw.space.collapse.nonspace</h1>
+<p class="desc">Non-space characters are not converted to U+0020 and collapsed</p>
+
+
+<script>
+var t = async_test("Non-space characters are not converted to U+0020 and collapsed");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '50px CanvasTest';
+ ctx.fillStyle = '#f00';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.fillStyle = '#0f0';
+ ctx.fillText('E\x0b EE', -150, 37.5);
+ _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+ }).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.space.collapse.nonspace.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.space.collapse.nonspace.worker.js
new file mode 100644
index 0000000000..cbc9803487
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.space.collapse.nonspace.worker.js
@@ -0,0 +1,34 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.draw.space.collapse.nonspace
+// Description:Non-space characters are not converted to U+0020 and collapsed
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Non-space characters are not converted to U+0020 and collapsed");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '50px CanvasTest';
+ ctx.fillStyle = '#f00';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.fillStyle = '#0f0';
+ ctx.fillText('E\x0b EE', -150, 37.5);
+ _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+ }).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.space.collapse.other.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.space.collapse.other.html
new file mode 100644
index 0000000000..0a6bb09c07
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.space.collapse.other.html
@@ -0,0 +1,38 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.draw.space.collapse.other</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.draw.space.collapse.other</h1>
+<p class="desc">Space characters are converted to U+0020, and collapsed (per CSS)</p>
+
+
+<script>
+var t = async_test("Space characters are converted to U+0020, and collapsed (per CSS)");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '50px CanvasTest';
+ ctx.fillStyle = '#f00';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.fillStyle = '#0f0';
+ ctx.fillText('E \x09\x0a\x0c\x0d \x09\x0a\x0c\x0dEE', -100, 37.5);
+ _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+ }).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.space.collapse.other.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.space.collapse.other.worker.js
new file mode 100644
index 0000000000..e13b87a531
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.space.collapse.other.worker.js
@@ -0,0 +1,34 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.draw.space.collapse.other
+// Description:Space characters are converted to U+0020, and collapsed (per CSS)
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Space characters are converted to U+0020, and collapsed (per CSS)");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '50px CanvasTest';
+ ctx.fillStyle = '#f00';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.fillStyle = '#0f0';
+ ctx.fillText('E \x09\x0a\x0c\x0d \x09\x0a\x0c\x0dEE', -100, 37.5);
+ _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+ }).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.space.collapse.space.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.space.collapse.space.html
new file mode 100644
index 0000000000..3308cc7598
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.space.collapse.space.html
@@ -0,0 +1,38 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.draw.space.collapse.space</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.draw.space.collapse.space</h1>
+<p class="desc">Space characters are converted to U+0020, and collapsed (per CSS)</p>
+
+
+<script>
+var t = async_test("Space characters are converted to U+0020, and collapsed (per CSS)");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '50px CanvasTest';
+ ctx.fillStyle = '#f00';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.fillStyle = '#0f0';
+ ctx.fillText('E EE', -100, 37.5);
+ _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+ }).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.space.collapse.space.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.space.collapse.space.worker.js
new file mode 100644
index 0000000000..4ea78a2466
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.space.collapse.space.worker.js
@@ -0,0 +1,34 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.draw.space.collapse.space
+// Description:Space characters are converted to U+0020, and collapsed (per CSS)
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Space characters are converted to U+0020, and collapsed (per CSS)");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '50px CanvasTest';
+ ctx.fillStyle = '#f00';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.fillStyle = '#0f0';
+ ctx.fillText('E EE', -100, 37.5);
+ _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+ }).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.space.collapse.start.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.space.collapse.start.html
new file mode 100644
index 0000000000..94b3f9ff0b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.space.collapse.start.html
@@ -0,0 +1,38 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.draw.space.collapse.start</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.draw.space.collapse.start</h1>
+<p class="desc">Space characters at the start of a line are collapsed (per CSS)</p>
+
+
+<script>
+var t = async_test("Space characters at the start of a line are collapsed (per CSS)");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '50px CanvasTest';
+ ctx.fillStyle = '#f00';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.fillStyle = '#0f0';
+ ctx.fillText(' EE', 0, 37.5);
+ _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+ }).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.space.collapse.start.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.space.collapse.start.worker.js
new file mode 100644
index 0000000000..20bd10ae57
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.space.collapse.start.worker.js
@@ -0,0 +1,34 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.draw.space.collapse.start
+// Description:Space characters at the start of a line are collapsed (per CSS)
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Space characters at the start of a line are collapsed (per CSS)");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '50px CanvasTest';
+ ctx.fillStyle = '#f00';
+ ctx.fillRect(0, 0, 100, 50);
+ ctx.fillStyle = '#0f0';
+ ctx.fillText(' EE', 0, 37.5);
+ _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+ _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+ }).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.stroke.basic-manual.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.stroke.basic-manual.html
new file mode 100644
index 0000000000..5aee6afc0d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.stroke.basic-manual.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.draw.stroke.basic</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.draw.stroke.basic</h1>
+<p class="desc">strokeText draws stroked text</p>
+
+
+<script>
+var t = async_test("strokeText draws stroked text");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#000';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.fillStyle = '#f00';
+ctx.lineWidth = 1;
+ctx.font = '35px Arial, sans-serif';
+ctx.strokeText('PASS', 5, 35);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.stroke.basic-manual.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.stroke.basic-manual.worker.js
new file mode 100644
index 0000000000..8806e011ea
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.stroke.basic-manual.worker.js
@@ -0,0 +1,29 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.draw.stroke.basic
+// Description:strokeText draws stroked text
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("strokeText draws stroked text");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#000';
+ctx.fillRect(0, 0, 100, 50);
+ctx.strokeStyle = '#0f0';
+ctx.fillStyle = '#f00';
+ctx.lineWidth = 1;
+ctx.font = '35px Arial, sans-serif';
+ctx.strokeText('PASS', 5, 35);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.stroke.basic.png b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.stroke.basic.png
new file mode 100644
index 0000000000..fb3b5b830d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.stroke.basic.png
Binary files differ
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.stroke.unaffected.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.stroke.unaffected.html
new file mode 100644
index 0000000000..7cad996cc0
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.stroke.unaffected.html
@@ -0,0 +1,43 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.draw.stroke.unaffected</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.draw.stroke.unaffected</h1>
+<p class="desc">strokeText does not start a new path or subpath</p>
+
+
+<script>
+var t = async_test("strokeText does not start a new path or subpath");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+
+ctx.moveTo(0, 0);
+ctx.lineTo(100, 0);
+
+ctx.font = '35px Arial, sans-serif';
+ctx.strokeStyle = '#f00';
+ctx.strokeText('FAIL', 5, 35);
+
+ctx.lineTo(100, 50);
+ctx.lineTo(0, 50);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 5,45, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.stroke.unaffected.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.stroke.unaffected.worker.js
new file mode 100644
index 0000000000..7ce3b1adc7
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.draw.stroke.unaffected.worker.js
@@ -0,0 +1,39 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.draw.stroke.unaffected
+// Description:strokeText does not start a new path or subpath
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("strokeText does not start a new path or subpath");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+
+ctx.moveTo(0, 0);
+ctx.lineTo(100, 0);
+
+ctx.font = '35px Arial, sans-serif';
+ctx.strokeStyle = '#f00';
+ctx.strokeText('FAIL', 5, 35);
+
+ctx.lineTo(100, 50);
+ctx.lineTo(0, 50);
+ctx.fillStyle = '#0f0';
+ctx.fill();
+
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 5,45, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.fontKerning.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.fontKerning.html
new file mode 100644
index 0000000000..30e12f31bb
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.fontKerning.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.drawing.style.fontKerning</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.drawing.style.fontKerning</h1>
+<p class="desc">Testing basic functionalities of fontKerning for canvas</p>
+
+
+<script>
+var t = async_test("Testing basic functionalities of fontKerning for canvas");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertSame(ctx.fontKerning, "auto", "ctx.fontKerning", "\"auto\"");
+ctx.fontKerning = "normal";
+_assertSame(ctx.fontKerning, "normal", "ctx.fontKerning", "\"normal\"");
+width_normal = ctx.measureText("TAWATAVA").width;
+ctx.fontKerning = "none";
+_assertSame(ctx.fontKerning, "none", "ctx.fontKerning", "\"none\"");
+width_none = ctx.measureText("TAWATAVA").width;
+_assert(width_normal < width_none, "width_normal < width_none");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.fontKerning.with.uppercase.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.fontKerning.with.uppercase.html
new file mode 100644
index 0000000000..a9a5ae23f5
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.fontKerning.with.uppercase.html
@@ -0,0 +1,56 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.drawing.style.fontKerning.with.uppercase</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.drawing.style.fontKerning.with.uppercase</h1>
+<p class="desc">Testing basic functionalities of fontKerning for canvas</p>
+
+
+<script>
+var t = async_test("Testing basic functionalities of fontKerning for canvas");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertSame(ctx.fontKerning, "auto", "ctx.fontKerning", "\"auto\"");
+ctx.fontKerning = "Normal";
+_assertSame(ctx.fontKerning, "normal", "ctx.fontKerning", "\"normal\"");
+ctx.fontKerning = "auto";
+ctx.fontKerning = "normal";
+_assertSame(ctx.fontKerning, "normal", "ctx.fontKerning", "\"normal\"");
+ctx.fontKerning = "auto";
+ctx.fontKerning = "noRmal";
+_assertSame(ctx.fontKerning, "normal", "ctx.fontKerning", "\"normal\"");
+ctx.fontKerning = "auto";
+ctx.fontKerning = "NoRMal";
+_assertSame(ctx.fontKerning, "normal", "ctx.fontKerning", "\"normal\"");
+ctx.fontKerning = "auto";
+ctx.fontKerning = "NORMAL";
+_assertSame(ctx.fontKerning, "normal", "ctx.fontKerning", "\"normal\"");
+
+ctx.fontKerning = "None";
+_assertSame(ctx.fontKerning, "none", "ctx.fontKerning", "\"none\"");
+ctx.fontKerning = "auto";
+ctx.fontKerning = "none";
+_assertSame(ctx.fontKerning, "none", "ctx.fontKerning", "\"none\"");
+ctx.fontKerning = "auto";
+ctx.fontKerning = "nOne";
+_assertSame(ctx.fontKerning, "none", "ctx.fontKerning", "\"none\"");
+ctx.fontKerning = "auto";
+ctx.fontKerning = "nonE";
+_assertSame(ctx.fontKerning, "none", "ctx.fontKerning", "\"none\"");
+ctx.fontKerning = "auto";
+ctx.fontKerning = "NONE";
+_assertSame(ctx.fontKerning, "none", "ctx.fontKerning", "\"none\"");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.fontKerning.with.uppercase.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.fontKerning.with.uppercase.worker.js
new file mode 100644
index 0000000000..a8837374e0
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.fontKerning.with.uppercase.worker.js
@@ -0,0 +1,52 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.drawing.style.fontKerning.with.uppercase
+// Description:Testing basic functionalities of fontKerning for canvas
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Testing basic functionalities of fontKerning for canvas");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertSame(ctx.fontKerning, "auto", "ctx.fontKerning", "\"auto\"");
+ctx.fontKerning = "Normal";
+_assertSame(ctx.fontKerning, "normal", "ctx.fontKerning", "\"normal\"");
+ctx.fontKerning = "auto";
+ctx.fontKerning = "normal";
+_assertSame(ctx.fontKerning, "normal", "ctx.fontKerning", "\"normal\"");
+ctx.fontKerning = "auto";
+ctx.fontKerning = "noRmal";
+_assertSame(ctx.fontKerning, "normal", "ctx.fontKerning", "\"normal\"");
+ctx.fontKerning = "auto";
+ctx.fontKerning = "NoRMal";
+_assertSame(ctx.fontKerning, "normal", "ctx.fontKerning", "\"normal\"");
+ctx.fontKerning = "auto";
+ctx.fontKerning = "NORMAL";
+_assertSame(ctx.fontKerning, "normal", "ctx.fontKerning", "\"normal\"");
+
+ctx.fontKerning = "None";
+_assertSame(ctx.fontKerning, "none", "ctx.fontKerning", "\"none\"");
+ctx.fontKerning = "auto";
+ctx.fontKerning = "none";
+_assertSame(ctx.fontKerning, "none", "ctx.fontKerning", "\"none\"");
+ctx.fontKerning = "auto";
+ctx.fontKerning = "nOne";
+_assertSame(ctx.fontKerning, "none", "ctx.fontKerning", "\"none\"");
+ctx.fontKerning = "auto";
+ctx.fontKerning = "nonE";
+_assertSame(ctx.fontKerning, "none", "ctx.fontKerning", "\"none\"");
+ctx.fontKerning = "auto";
+ctx.fontKerning = "NONE";
+_assertSame(ctx.fontKerning, "none", "ctx.fontKerning", "\"none\"");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.fontKerning.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.fontKerning.worker.js
new file mode 100644
index 0000000000..9478eece85
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.fontKerning.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.drawing.style.fontKerning
+// Description:Testing basic functionalities of fontKerning for canvas
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Testing basic functionalities of fontKerning for canvas");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertSame(ctx.fontKerning, "auto", "ctx.fontKerning", "\"auto\"");
+ctx.fontKerning = "normal";
+_assertSame(ctx.fontKerning, "normal", "ctx.fontKerning", "\"normal\"");
+width_normal = ctx.measureText("TAWATAVA").width;
+ctx.fontKerning = "none";
+_assertSame(ctx.fontKerning, "none", "ctx.fontKerning", "\"none\"");
+width_none = ctx.measureText("TAWATAVA").width;
+_assert(width_normal < width_none, "width_normal < width_none");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.fontVariant.settings.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.fontVariant.settings.html
new file mode 100644
index 0000000000..08c48f1bcd
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.fontVariant.settings.html
@@ -0,0 +1,75 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.drawing.style.fontVariant.settings</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.drawing.style.fontVariant.settings</h1>
+<p class="desc">Testing basic functionalities of fontKerning for canvas</p>
+
+
+<script>
+var t = async_test("Testing basic functionalities of fontKerning for canvas");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+// Setting fontVariantCaps with lower cases
+_assertSame(ctx.fontVariantCaps, "normal", "ctx.fontVariantCaps", "\"normal\"");
+
+ctx.fontVariantCaps = "normal";
+_assertSame(ctx.fontVariantCaps, "normal", "ctx.fontVariantCaps", "\"normal\"");
+
+ctx.fontVariantCaps = "small-caps";
+_assertSame(ctx.fontVariantCaps, "small-caps", "ctx.fontVariantCaps", "\"small-caps\"");
+
+ctx.fontVariantCaps = "all-small-caps";
+_assertSame(ctx.fontVariantCaps, "all-small-caps", "ctx.fontVariantCaps", "\"all-small-caps\"");
+
+ctx.fontVariantCaps = "petite-caps";
+_assertSame(ctx.fontVariantCaps, "petite-caps", "ctx.fontVariantCaps", "\"petite-caps\"");
+
+ctx.fontVariantCaps = "all-petite-caps";
+_assertSame(ctx.fontVariantCaps, "all-petite-caps", "ctx.fontVariantCaps", "\"all-petite-caps\"");
+
+ctx.fontVariantCaps = "unicase";
+_assertSame(ctx.fontVariantCaps, "unicase", "ctx.fontVariantCaps", "\"unicase\"");
+
+ctx.fontVariantCaps = "titling-caps";
+_assertSame(ctx.fontVariantCaps, "titling-caps", "ctx.fontVariantCaps", "\"titling-caps\"");
+
+// Setting fontVariantCaps with lower cases and upper cases word.
+ctx.fontVariantCaps = "nORmal";
+_assertSame(ctx.fontVariantCaps, "normal", "ctx.fontVariantCaps", "\"normal\"");
+
+ctx.fontVariantCaps = "smaLL-caps";
+_assertSame(ctx.fontVariantCaps, "small-caps", "ctx.fontVariantCaps", "\"small-caps\"");
+
+ctx.fontVariantCaps = "all-small-CAPS";
+_assertSame(ctx.fontVariantCaps, "all-small-caps", "ctx.fontVariantCaps", "\"all-small-caps\"");
+
+ctx.fontVariantCaps = "pEtitE-caps";
+_assertSame(ctx.fontVariantCaps, "petite-caps", "ctx.fontVariantCaps", "\"petite-caps\"");
+
+ctx.fontVariantCaps = "All-Petite-Caps";
+_assertSame(ctx.fontVariantCaps, "all-petite-caps", "ctx.fontVariantCaps", "\"all-petite-caps\"");
+
+ctx.fontVariantCaps = "uNIcase";
+_assertSame(ctx.fontVariantCaps, "unicase", "ctx.fontVariantCaps", "\"unicase\"");
+
+ctx.fontVariantCaps = "titling-CAPS";
+_assertSame(ctx.fontVariantCaps, "titling-caps", "ctx.fontVariantCaps", "\"titling-caps\"");
+
+// Setting fontVariantCaps with non-existing font variant.
+ctx.fontVariantCaps = "abcd";
+_assertSame(ctx.fontVariantCaps, "titling-caps", "ctx.fontVariantCaps", "\"titling-caps\"");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.fontVariant.settings.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.fontVariant.settings.worker.js
new file mode 100644
index 0000000000..d4e9307bef
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.fontVariant.settings.worker.js
@@ -0,0 +1,71 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.drawing.style.fontVariant.settings
+// Description:Testing basic functionalities of fontKerning for canvas
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Testing basic functionalities of fontKerning for canvas");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+// Setting fontVariantCaps with lower cases
+_assertSame(ctx.fontVariantCaps, "normal", "ctx.fontVariantCaps", "\"normal\"");
+
+ctx.fontVariantCaps = "normal";
+_assertSame(ctx.fontVariantCaps, "normal", "ctx.fontVariantCaps", "\"normal\"");
+
+ctx.fontVariantCaps = "small-caps";
+_assertSame(ctx.fontVariantCaps, "small-caps", "ctx.fontVariantCaps", "\"small-caps\"");
+
+ctx.fontVariantCaps = "all-small-caps";
+_assertSame(ctx.fontVariantCaps, "all-small-caps", "ctx.fontVariantCaps", "\"all-small-caps\"");
+
+ctx.fontVariantCaps = "petite-caps";
+_assertSame(ctx.fontVariantCaps, "petite-caps", "ctx.fontVariantCaps", "\"petite-caps\"");
+
+ctx.fontVariantCaps = "all-petite-caps";
+_assertSame(ctx.fontVariantCaps, "all-petite-caps", "ctx.fontVariantCaps", "\"all-petite-caps\"");
+
+ctx.fontVariantCaps = "unicase";
+_assertSame(ctx.fontVariantCaps, "unicase", "ctx.fontVariantCaps", "\"unicase\"");
+
+ctx.fontVariantCaps = "titling-caps";
+_assertSame(ctx.fontVariantCaps, "titling-caps", "ctx.fontVariantCaps", "\"titling-caps\"");
+
+// Setting fontVariantCaps with lower cases and upper cases word.
+ctx.fontVariantCaps = "nORmal";
+_assertSame(ctx.fontVariantCaps, "normal", "ctx.fontVariantCaps", "\"normal\"");
+
+ctx.fontVariantCaps = "smaLL-caps";
+_assertSame(ctx.fontVariantCaps, "small-caps", "ctx.fontVariantCaps", "\"small-caps\"");
+
+ctx.fontVariantCaps = "all-small-CAPS";
+_assertSame(ctx.fontVariantCaps, "all-small-caps", "ctx.fontVariantCaps", "\"all-small-caps\"");
+
+ctx.fontVariantCaps = "pEtitE-caps";
+_assertSame(ctx.fontVariantCaps, "petite-caps", "ctx.fontVariantCaps", "\"petite-caps\"");
+
+ctx.fontVariantCaps = "All-Petite-Caps";
+_assertSame(ctx.fontVariantCaps, "all-petite-caps", "ctx.fontVariantCaps", "\"all-petite-caps\"");
+
+ctx.fontVariantCaps = "uNIcase";
+_assertSame(ctx.fontVariantCaps, "unicase", "ctx.fontVariantCaps", "\"unicase\"");
+
+ctx.fontVariantCaps = "titling-CAPS";
+_assertSame(ctx.fontVariantCaps, "titling-caps", "ctx.fontVariantCaps", "\"titling-caps\"");
+
+// Setting fontVariantCaps with non-existing font variant.
+ctx.fontVariantCaps = "abcd";
+_assertSame(ctx.fontVariantCaps, "titling-caps", "ctx.fontVariantCaps", "\"titling-caps\"");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.invalid.spacing.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.invalid.spacing.html
new file mode 100644
index 0000000000..a117be0365
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.invalid.spacing.html
@@ -0,0 +1,40 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.drawing.style.invalid.spacing</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.drawing.style.invalid.spacing</h1>
+<p class="desc">Testing letter spacing and word spacing with invalid units</p>
+
+
+<script>
+var t = async_test("Testing letter spacing and word spacing with invalid units");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertSame(ctx.letterSpacing, '0px', "ctx.letterSpacing", "'0px'");
+_assertSame(ctx.wordSpacing, '0px', "ctx.wordSpacing", "'0px'");
+
+function test_word_spacing(value) {
+ ctx.wordSpacing = value;
+ ctx.letterSpacing = value;
+ _assertSame(ctx.wordSpacing, '0px', "ctx.wordSpacing", "'0px'");
+ _assertSame(ctx.letterSpacing, '0px', "ctx.letterSpacing", "'0px'");
+}
+test_word_spacing('0s');
+test_word_spacing('1min');
+test_word_spacing('1deg');
+test_word_spacing('1pp');
+
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.invalid.spacing.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.invalid.spacing.worker.js
new file mode 100644
index 0000000000..7f6baf28b6
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.invalid.spacing.worker.js
@@ -0,0 +1,36 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.drawing.style.invalid.spacing
+// Description:Testing letter spacing and word spacing with invalid units
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Testing letter spacing and word spacing with invalid units");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertSame(ctx.letterSpacing, '0px', "ctx.letterSpacing", "'0px'");
+_assertSame(ctx.wordSpacing, '0px', "ctx.wordSpacing", "'0px'");
+
+function test_word_spacing(value) {
+ ctx.wordSpacing = value;
+ ctx.letterSpacing = value;
+ _assertSame(ctx.wordSpacing, '0px', "ctx.wordSpacing", "'0px'");
+ _assertSame(ctx.letterSpacing, '0px', "ctx.letterSpacing", "'0px'");
+}
+test_word_spacing('0s');
+test_word_spacing('1min');
+test_word_spacing('1deg');
+test_word_spacing('1pp');
+
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.letterSpacing.change.font.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.letterSpacing.change.font.html
new file mode 100644
index 0000000000..ff84f4541b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.letterSpacing.change.font.html
@@ -0,0 +1,46 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.drawing.style.letterSpacing.change.font</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.drawing.style.letterSpacing.change.font</h1>
+<p class="desc">Set letter spacing and word spacing to font dependent value and verify it works after font change.</p>
+
+
+<script>
+var t = async_test("Set letter spacing and word spacing to font dependent value and verify it works after font change.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertSame(ctx.letterSpacing, '0px', "ctx.letterSpacing", "'0px'");
+_assertSame(ctx.wordSpacing, '0px', "ctx.wordSpacing", "'0px'");
+// Get the width for 'Hello World' at default size, 10px.
+var width_normal = ctx.measureText('Hello World').width;
+
+ctx.letterSpacing = '1em';
+_assertSame(ctx.letterSpacing, '1em', "ctx.letterSpacing", "'1em'");
+// 1em = 10px. Add 10px after each letter in "Hello World",
+// makes it 110px longer.
+var width_with_spacing = ctx.measureText('Hello World').width;
+_assertSame(width_with_spacing, width_normal + 110, "width_with_spacing", "width_normal + 110");
+
+// Changing font to 20px. Without resetting the spacing, 1em letterSpacing
+// is now 20px, so it's suppose to be 220px longer without any letterSpacing set.
+ctx.font = '20px serif';
+width_with_spacing = ctx.measureText('Hello World').width;
+// Now calculate the reference spacing for "Hello World" with no spacing.
+ctx.letterSpacing = '0em';
+width_normal = ctx.measureText('Hello World').width;
+_assertSame(width_with_spacing, width_normal + 220, "width_with_spacing", "width_normal + 220");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.letterSpacing.change.font.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.letterSpacing.change.font.worker.js
new file mode 100644
index 0000000000..5a6bf6614d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.letterSpacing.change.font.worker.js
@@ -0,0 +1,42 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.drawing.style.letterSpacing.change.font
+// Description:Set letter spacing and word spacing to font dependent value and verify it works after font change.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Set letter spacing and word spacing to font dependent value and verify it works after font change.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertSame(ctx.letterSpacing, '0px', "ctx.letterSpacing", "'0px'");
+_assertSame(ctx.wordSpacing, '0px', "ctx.wordSpacing", "'0px'");
+// Get the width for 'Hello World' at default size, 10px.
+var width_normal = ctx.measureText('Hello World').width;
+
+ctx.letterSpacing = '1em';
+_assertSame(ctx.letterSpacing, '1em', "ctx.letterSpacing", "'1em'");
+// 1em = 10px. Add 10px after each letter in "Hello World",
+// makes it 110px longer.
+var width_with_spacing = ctx.measureText('Hello World').width;
+_assertSame(width_with_spacing, width_normal + 110, "width_with_spacing", "width_normal + 110");
+
+// Changing font to 20px. Without resetting the spacing, 1em letterSpacing
+// is now 20px, so it's suppose to be 220px longer without any letterSpacing set.
+ctx.font = '20px serif';
+width_with_spacing = ctx.measureText('Hello World').width;
+// Now calculate the reference spacing for "Hello World" with no spacing.
+ctx.letterSpacing = '0em';
+width_normal = ctx.measureText('Hello World').width;
+_assertSame(width_with_spacing, width_normal + 220, "width_with_spacing", "width_normal + 220");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.letterSpacing.measure.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.letterSpacing.measure.html
new file mode 100644
index 0000000000..b63c81b255
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.letterSpacing.measure.html
@@ -0,0 +1,54 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.drawing.style.letterSpacing.measure</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.drawing.style.letterSpacing.measure</h1>
+<p class="desc">Testing letter spacing and word spacing</p>
+
+
+<script>
+var t = async_test("Testing letter spacing and word spacing");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertSame(ctx.letterSpacing, '0px', "ctx.letterSpacing", "'0px'");
+_assertSame(ctx.wordSpacing, '0px', "ctx.wordSpacing", "'0px'");
+var width_normal = ctx.measureText('Hello World').width;
+
+function test_letter_spacing(value, difference_spacing, epsilon) {
+ ctx.letterSpacing = value;
+ _assertSame(ctx.letterSpacing, value, "ctx.letterSpacing", "value");
+ _assertSame(ctx.wordSpacing, '0px', "ctx.wordSpacing", "'0px'");
+ width_with_letter_spacing = ctx.measureText('Hello World').width;
+ assert_approx_equals(width_with_letter_spacing, width_normal + difference_spacing, epsilon, "letter spacing doesn't work.");
+}
+
+// The first value is the letter Spacing to be set, the second value the
+// change in length of string 'Hello World', note that there are 11 letters
+// in 'hello world', so the length difference is always letterSpacing * 11.
+// and the third value is the acceptable differencee for the length change,
+// note that unit such as 1cm/1mm doesn't map to an exact pixel value.
+test_cases = [['3px', 33, 0],
+ ['5px', 55, 0],
+ ['-2px', -22, 0],
+ ['1em', 110, 0],
+ ['1in', 1056, 0],
+ ['-0.1cm', -41.65, 0.2],
+ ['-0.6mm', -24,95, 0.2]]
+
+for (const test_case of test_cases) {
+ test_letter_spacing(test_case[0], test_case[1], test_case[2]);
+}
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.letterSpacing.measure.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.letterSpacing.measure.worker.js
new file mode 100644
index 0000000000..b9189cba30
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.letterSpacing.measure.worker.js
@@ -0,0 +1,50 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.drawing.style.letterSpacing.measure
+// Description:Testing letter spacing and word spacing
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Testing letter spacing and word spacing");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertSame(ctx.letterSpacing, '0px', "ctx.letterSpacing", "'0px'");
+_assertSame(ctx.wordSpacing, '0px', "ctx.wordSpacing", "'0px'");
+var width_normal = ctx.measureText('Hello World').width;
+
+function test_letter_spacing(value, difference_spacing, epsilon) {
+ ctx.letterSpacing = value;
+ _assertSame(ctx.letterSpacing, value, "ctx.letterSpacing", "value");
+ _assertSame(ctx.wordSpacing, '0px', "ctx.wordSpacing", "'0px'");
+ width_with_letter_spacing = ctx.measureText('Hello World').width;
+ assert_approx_equals(width_with_letter_spacing, width_normal + difference_spacing, epsilon, "letter spacing doesn't work.");
+}
+
+// The first value is the letter Spacing to be set, the second value the
+// change in length of string 'Hello World', note that there are 11 letters
+// in 'hello world', so the length difference is always letterSpacing * 11.
+// and the third value is the acceptable differencee for the length change,
+// note that unit such as 1cm/1mm doesn't map to an exact pixel value.
+test_cases = [['3px', 33, 0],
+ ['5px', 55, 0],
+ ['-2px', -22, 0],
+ ['1em', 110, 0],
+ ['1in', 1056, 0],
+ ['-0.1cm', -41.65, 0.2],
+ ['-0.6mm', -24,95, 0.2]]
+
+for (const test_case of test_cases) {
+ test_letter_spacing(test_case[0], test_case[1], test_case[2]);
+}
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.measure.direction.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.measure.direction.html
new file mode 100644
index 0000000000..04774a9d0f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.measure.direction.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.drawing.style.measure.direction</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.drawing.style.measure.direction</h1>
+<p class="desc">Measurement should follow text direction</p>
+
+
+<script>
+var t = async_test("Measurement should follow text direction");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.direction = "ltr";
+metrics = ctx.measureText('hello');
+_assert(metrics.actualBoundingBoxLeft < metrics.actualBoundingBoxRight, "metrics.actualBoundingBoxLeft < metrics.actualBoundingBoxRight");
+
+ctx.direction = "rtl";
+metrics = ctx.measureText('hello');
+_assert(metrics.actualBoundingBoxLeft > metrics.actualBoundingBoxRight, "metrics.actualBoundingBoxLeft > metrics.actualBoundingBoxRight");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.measure.direction.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.measure.direction.worker.js
new file mode 100644
index 0000000000..8f5585682b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.measure.direction.worker.js
@@ -0,0 +1,29 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.drawing.style.measure.direction
+// Description:Measurement should follow text direction
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Measurement should follow text direction");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.direction = "ltr";
+metrics = ctx.measureText('hello');
+_assert(metrics.actualBoundingBoxLeft < metrics.actualBoundingBoxRight, "metrics.actualBoundingBoxLeft < metrics.actualBoundingBoxRight");
+
+ctx.direction = "rtl";
+metrics = ctx.measureText('hello');
+_assert(metrics.actualBoundingBoxLeft > metrics.actualBoundingBoxRight, "metrics.actualBoundingBoxLeft > metrics.actualBoundingBoxRight");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.measure.rtl.text.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.measure.rtl.text.html
new file mode 100644
index 0000000000..7eba676652
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.measure.rtl.text.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.drawing.style.measure.rtl.text</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.drawing.style.measure.rtl.text</h1>
+<p class="desc">Measurement should follow canvas direction instead text direction</p>
+
+
+<script>
+var t = async_test("Measurement should follow canvas direction instead text direction");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+metrics = ctx.measureText('اَلْعَرَبِيَّةُ');
+_assert(metrics.actualBoundingBoxLeft < metrics.actualBoundingBoxRight, "metrics.actualBoundingBoxLeft < metrics.actualBoundingBoxRight");
+
+metrics = ctx.measureText('hello');
+_assert(metrics.actualBoundingBoxLeft < metrics.actualBoundingBoxRight, "metrics.actualBoundingBoxLeft < metrics.actualBoundingBoxRight");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.measure.rtl.text.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.measure.rtl.text.worker.js
new file mode 100644
index 0000000000..585e6c0c74
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.measure.rtl.text.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.drawing.style.measure.rtl.text
+// Description:Measurement should follow canvas direction instead text direction
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Measurement should follow canvas direction instead text direction");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+metrics = ctx.measureText('اَلْعَرَبِيَّةُ');
+_assert(metrics.actualBoundingBoxLeft < metrics.actualBoundingBoxRight, "metrics.actualBoundingBoxLeft < metrics.actualBoundingBoxRight");
+
+metrics = ctx.measureText('hello');
+_assert(metrics.actualBoundingBoxLeft < metrics.actualBoundingBoxRight, "metrics.actualBoundingBoxLeft < metrics.actualBoundingBoxRight");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.measure.textAlign.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.measure.textAlign.html
new file mode 100644
index 0000000000..f784f569b2
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.measure.textAlign.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.drawing.style.measure.textAlign</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.drawing.style.measure.textAlign</h1>
+<p class="desc">Measurement should be related to textAlignment</p>
+
+
+<script>
+var t = async_test("Measurement should be related to textAlignment");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.textAlign = "right";
+metrics = ctx.measureText('hello');
+_assert(metrics.actualBoundingBoxLeft > metrics.actualBoundingBoxRight, "metrics.actualBoundingBoxLeft > metrics.actualBoundingBoxRight");
+
+ctx.textAlign = "left"
+metrics = ctx.measureText('hello');
+_assert(metrics.actualBoundingBoxLeft < metrics.actualBoundingBoxRight, "metrics.actualBoundingBoxLeft < metrics.actualBoundingBoxRight");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.measure.textAlign.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.measure.textAlign.worker.js
new file mode 100644
index 0000000000..3af2f47143
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.measure.textAlign.worker.js
@@ -0,0 +1,29 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.drawing.style.measure.textAlign
+// Description:Measurement should be related to textAlignment
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Measurement should be related to textAlignment");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.textAlign = "right";
+metrics = ctx.measureText('hello');
+_assert(metrics.actualBoundingBoxLeft > metrics.actualBoundingBoxRight, "metrics.actualBoundingBoxLeft > metrics.actualBoundingBoxRight");
+
+ctx.textAlign = "left"
+metrics = ctx.measureText('hello');
+_assert(metrics.actualBoundingBoxLeft < metrics.actualBoundingBoxRight, "metrics.actualBoundingBoxLeft < metrics.actualBoundingBoxRight");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.nonfinite.spacing.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.nonfinite.spacing.html
new file mode 100644
index 0000000000..8e80f9a3ab
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.nonfinite.spacing.html
@@ -0,0 +1,39 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.drawing.style.nonfinite.spacing</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.drawing.style.nonfinite.spacing</h1>
+<p class="desc">Testing letter spacing and word spacing with nonfinite inputs</p>
+
+
+<script>
+var t = async_test("Testing letter spacing and word spacing with nonfinite inputs");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertSame(ctx.letterSpacing, '0px', "ctx.letterSpacing", "'0px'");
+_assertSame(ctx.wordSpacing, '0px', "ctx.wordSpacing", "'0px'");
+
+function test_word_spacing(value) {
+ ctx.wordSpacing = value;
+ ctx.letterSpacing = value;
+ _assertSame(ctx.wordSpacing, '0px', "ctx.wordSpacing", "'0px'");
+ _assertSame(ctx.letterSpacing, '0px', "ctx.letterSpacing", "'0px'");
+}
+test_word_spacing(NaN);
+test_word_spacing(Infinity);
+test_word_spacing(-Infinity);
+
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.nonfinite.spacing.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.nonfinite.spacing.worker.js
new file mode 100644
index 0000000000..adba253282
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.nonfinite.spacing.worker.js
@@ -0,0 +1,35 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.drawing.style.nonfinite.spacing
+// Description:Testing letter spacing and word spacing with nonfinite inputs
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Testing letter spacing and word spacing with nonfinite inputs");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertSame(ctx.letterSpacing, '0px', "ctx.letterSpacing", "'0px'");
+_assertSame(ctx.wordSpacing, '0px', "ctx.wordSpacing", "'0px'");
+
+function test_word_spacing(value) {
+ ctx.wordSpacing = value;
+ ctx.letterSpacing = value;
+ _assertSame(ctx.wordSpacing, '0px', "ctx.wordSpacing", "'0px'");
+ _assertSame(ctx.letterSpacing, '0px', "ctx.letterSpacing", "'0px'");
+}
+test_word_spacing(NaN);
+test_word_spacing(Infinity);
+test_word_spacing(-Infinity);
+
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.spacing.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.spacing.html
new file mode 100644
index 0000000000..ea480c4690
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.spacing.html
@@ -0,0 +1,46 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.drawing.style.spacing</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.drawing.style.spacing</h1>
+<p class="desc">Testing letter spacing and word spacing</p>
+
+
+<script>
+var t = async_test("Testing letter spacing and word spacing");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertSame(ctx.letterSpacing, '0px', "ctx.letterSpacing", "'0px'");
+_assertSame(ctx.wordSpacing, '0px', "ctx.wordSpacing", "'0px'");
+
+ctx.letterSpacing = '3px';
+_assertSame(ctx.letterSpacing, '3px', "ctx.letterSpacing", "'3px'");
+_assertSame(ctx.wordSpacing, '0px', "ctx.wordSpacing", "'0px'");
+
+ctx.wordSpacing = '5px';
+_assertSame(ctx.letterSpacing, '3px', "ctx.letterSpacing", "'3px'");
+_assertSame(ctx.wordSpacing, '5px', "ctx.wordSpacing", "'5px'");
+
+ctx.letterSpacing = '-1px';
+ctx.wordSpacing = '-1px';
+_assertSame(ctx.letterSpacing, '-1px', "ctx.letterSpacing", "'-1px'");
+_assertSame(ctx.wordSpacing, '-1px', "ctx.wordSpacing", "'-1px'");
+
+ctx.letterSpacing = '1PX';
+ctx.wordSpacing = '1EM';
+_assertSame(ctx.letterSpacing, '1px', "ctx.letterSpacing", "'1px'");
+_assertSame(ctx.wordSpacing, '1em', "ctx.wordSpacing", "'1em'");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.spacing.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.spacing.worker.js
new file mode 100644
index 0000000000..a413f9270a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.spacing.worker.js
@@ -0,0 +1,42 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.drawing.style.spacing
+// Description:Testing letter spacing and word spacing
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Testing letter spacing and word spacing");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertSame(ctx.letterSpacing, '0px', "ctx.letterSpacing", "'0px'");
+_assertSame(ctx.wordSpacing, '0px', "ctx.wordSpacing", "'0px'");
+
+ctx.letterSpacing = '3px';
+_assertSame(ctx.letterSpacing, '3px', "ctx.letterSpacing", "'3px'");
+_assertSame(ctx.wordSpacing, '0px', "ctx.wordSpacing", "'0px'");
+
+ctx.wordSpacing = '5px';
+_assertSame(ctx.letterSpacing, '3px', "ctx.letterSpacing", "'3px'");
+_assertSame(ctx.wordSpacing, '5px', "ctx.wordSpacing", "'5px'");
+
+ctx.letterSpacing = '-1px';
+ctx.wordSpacing = '-1px';
+_assertSame(ctx.letterSpacing, '-1px', "ctx.letterSpacing", "'-1px'");
+_assertSame(ctx.wordSpacing, '-1px', "ctx.wordSpacing", "'-1px'");
+
+ctx.letterSpacing = '1PX';
+ctx.wordSpacing = '1EM';
+_assertSame(ctx.letterSpacing, '1px', "ctx.letterSpacing", "'1px'");
+_assertSame(ctx.wordSpacing, '1em', "ctx.wordSpacing", "'1em'");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.textRendering.settings.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.textRendering.settings.html
new file mode 100644
index 0000000000..d0c7b88a0c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.textRendering.settings.html
@@ -0,0 +1,57 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.drawing.style.textRendering.settings</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.drawing.style.textRendering.settings</h1>
+<p class="desc">Testing basic functionalities of textRendering in Canvas</p>
+
+
+<script>
+var t = async_test("Testing basic functionalities of textRendering in Canvas");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+// Setting textRendering with lower cases
+_assertSame(ctx.textRendering, "auto", "ctx.textRendering", "\"auto\"");
+
+ctx.textRendering = "auto";
+_assertSame(ctx.textRendering, "auto", "ctx.textRendering", "\"auto\"");
+
+ctx.textRendering = "optimizespeed";
+_assertSame(ctx.textRendering, "optimizeSpeed", "ctx.textRendering", "\"optimizeSpeed\"");
+
+ctx.textRendering = "optimizelegibility";
+_assertSame(ctx.textRendering, "optimizeLegibility", "ctx.textRendering", "\"optimizeLegibility\"");
+
+ctx.textRendering = "geometricprecision";
+_assertSame(ctx.textRendering, "geometricPrecision", "ctx.textRendering", "\"geometricPrecision\"");
+
+// Setting textRendering with lower cases and upper cases word.
+ctx.textRendering = "aUto";
+_assertSame(ctx.textRendering, "auto", "ctx.textRendering", "\"auto\"");
+
+ctx.textRendering = "OPtimizeSpeed";
+_assertSame(ctx.textRendering, "optimizeSpeed", "ctx.textRendering", "\"optimizeSpeed\"");
+
+ctx.textRendering = "OPtimizELEgibility";
+_assertSame(ctx.textRendering, "optimizeLegibility", "ctx.textRendering", "\"optimizeLegibility\"");
+
+ctx.textRendering = "GeometricPrecision";
+_assertSame(ctx.textRendering, "geometricPrecision", "ctx.textRendering", "\"geometricPrecision\"");
+
+// Setting textRendering with non-existing font variant.
+ctx.textRendering = "abcd";
+_assertSame(ctx.textRendering, "geometricPrecision", "ctx.textRendering", "\"geometricPrecision\"");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.textRendering.settings.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.textRendering.settings.worker.js
new file mode 100644
index 0000000000..e8402c2a08
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.textRendering.settings.worker.js
@@ -0,0 +1,53 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.drawing.style.textRendering.settings
+// Description:Testing basic functionalities of textRendering in Canvas
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Testing basic functionalities of textRendering in Canvas");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+// Setting textRendering with lower cases
+_assertSame(ctx.textRendering, "auto", "ctx.textRendering", "\"auto\"");
+
+ctx.textRendering = "auto";
+_assertSame(ctx.textRendering, "auto", "ctx.textRendering", "\"auto\"");
+
+ctx.textRendering = "optimizespeed";
+_assertSame(ctx.textRendering, "optimizeSpeed", "ctx.textRendering", "\"optimizeSpeed\"");
+
+ctx.textRendering = "optimizelegibility";
+_assertSame(ctx.textRendering, "optimizeLegibility", "ctx.textRendering", "\"optimizeLegibility\"");
+
+ctx.textRendering = "geometricprecision";
+_assertSame(ctx.textRendering, "geometricPrecision", "ctx.textRendering", "\"geometricPrecision\"");
+
+// Setting textRendering with lower cases and upper cases word.
+ctx.textRendering = "aUto";
+_assertSame(ctx.textRendering, "auto", "ctx.textRendering", "\"auto\"");
+
+ctx.textRendering = "OPtimizeSpeed";
+_assertSame(ctx.textRendering, "optimizeSpeed", "ctx.textRendering", "\"optimizeSpeed\"");
+
+ctx.textRendering = "OPtimizELEgibility";
+_assertSame(ctx.textRendering, "optimizeLegibility", "ctx.textRendering", "\"optimizeLegibility\"");
+
+ctx.textRendering = "GeometricPrecision";
+_assertSame(ctx.textRendering, "geometricPrecision", "ctx.textRendering", "\"geometricPrecision\"");
+
+// Setting textRendering with non-existing font variant.
+ctx.textRendering = "abcd";
+_assertSame(ctx.textRendering, "geometricPrecision", "ctx.textRendering", "\"geometricPrecision\"");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.wordSpacing.change.font.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.wordSpacing.change.font.html
new file mode 100644
index 0000000000..f8b72fbfab
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.wordSpacing.change.font.html
@@ -0,0 +1,46 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.drawing.style.wordSpacing.change.font</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.drawing.style.wordSpacing.change.font</h1>
+<p class="desc">Set word spacing and word spacing to font dependent value and verify it works after font change.</p>
+
+
+<script>
+var t = async_test("Set word spacing and word spacing to font dependent value and verify it works after font change.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertSame(ctx.letterSpacing, '0px', "ctx.letterSpacing", "'0px'");
+_assertSame(ctx.wordSpacing, '0px', "ctx.wordSpacing", "'0px'");
+// Get the width for 'Hello World, again' at default size, 10px.
+var width_normal = ctx.measureText('Hello World, again').width;
+
+ctx.wordSpacing = '1em';
+_assertSame(ctx.wordSpacing, '1em', "ctx.wordSpacing", "'1em'");
+// 1em = 10px. Add 10px after each word in "Hello World, again",
+// makes it 20px longer.
+var width_with_spacing = ctx.measureText('Hello World, again').width;
+_assertSame(width_with_spacing, width_normal + 20, "width_with_spacing", "width_normal + 20");
+
+// Changing font to 20px. Without resetting the spacing, 1em wordSpacing
+// is now 20px, so it's suppose to be 40px longer without any wordSpacing set.
+ctx.font = '20px serif';
+width_with_spacing = ctx.measureText('Hello World, again').width;
+// Now calculate the reference spacing for "Hello World, again" with no spacing.
+ctx.wordSpacing = '0em';
+width_normal = ctx.measureText('Hello World, again').width;
+_assertSame(width_with_spacing, width_normal + 40, "width_with_spacing", "width_normal + 40");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.wordSpacing.change.font.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.wordSpacing.change.font.worker.js
new file mode 100644
index 0000000000..993cd28501
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.wordSpacing.change.font.worker.js
@@ -0,0 +1,42 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.drawing.style.wordSpacing.change.font
+// Description:Set word spacing and word spacing to font dependent value and verify it works after font change.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Set word spacing and word spacing to font dependent value and verify it works after font change.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertSame(ctx.letterSpacing, '0px', "ctx.letterSpacing", "'0px'");
+_assertSame(ctx.wordSpacing, '0px', "ctx.wordSpacing", "'0px'");
+// Get the width for 'Hello World, again' at default size, 10px.
+var width_normal = ctx.measureText('Hello World, again').width;
+
+ctx.wordSpacing = '1em';
+_assertSame(ctx.wordSpacing, '1em', "ctx.wordSpacing", "'1em'");
+// 1em = 10px. Add 10px after each word in "Hello World, again",
+// makes it 20px longer.
+var width_with_spacing = ctx.measureText('Hello World, again').width;
+_assertSame(width_with_spacing, width_normal + 20, "width_with_spacing", "width_normal + 20");
+
+// Changing font to 20px. Without resetting the spacing, 1em wordSpacing
+// is now 20px, so it's suppose to be 40px longer without any wordSpacing set.
+ctx.font = '20px serif';
+width_with_spacing = ctx.measureText('Hello World, again').width;
+// Now calculate the reference spacing for "Hello World, again" with no spacing.
+ctx.wordSpacing = '0em';
+width_normal = ctx.measureText('Hello World, again').width;
+_assertSame(width_with_spacing, width_normal + 40, "width_with_spacing", "width_normal + 40");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.wordSpacing.measure.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.wordSpacing.measure.html
new file mode 100644
index 0000000000..9ef479bba2
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.wordSpacing.measure.html
@@ -0,0 +1,54 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.drawing.style.wordSpacing.measure</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.drawing.style.wordSpacing.measure</h1>
+<p class="desc">Testing if word spacing is working properly</p>
+
+
+<script>
+var t = async_test("Testing if word spacing is working properly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertSame(ctx.letterSpacing, '0px', "ctx.letterSpacing", "'0px'");
+_assertSame(ctx.wordSpacing, '0px', "ctx.wordSpacing", "'0px'");
+var width_normal = ctx.measureText('Hello World, again').width;
+
+function test_word_spacing(value, difference_spacing, epsilon) {
+ ctx.wordSpacing = value;
+ _assertSame(ctx.letterSpacing, '0px', "ctx.letterSpacing", "'0px'");
+ _assertSame(ctx.wordSpacing, value, "ctx.wordSpacing", "value");
+ width_with_word_spacing = ctx.measureText('Hello World, again').width;
+ assert_approx_equals(width_with_word_spacing, width_normal + difference_spacing, epsilon, "word spacing doesn't work.");
+}
+
+// The first value is the word Spacing to be set, the second value the
+// change in length of string 'Hello World', note that there are 2 words
+// in 'Hello World, again', so the length difference is always wordSpacing * 2.
+// and the third value is the acceptable differencee for the length change,
+// note that unit such as 1cm/1mm doesn't map to an exact pixel value.
+test_cases = [['3px', 6, 0],
+ ['5px', 10, 0],
+ ['-2px', -4, 0],
+ ['1em', 20, 0],
+ ['1in', 192, 0],
+ ['-0.1cm', -7.57, 0.2],
+ ['-0.6mm', -4.54, 0.2]]
+
+for (const test_case of test_cases) {
+ test_word_spacing(test_case[0], test_case[1], test_case[2]);
+}
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.wordSpacing.measure.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.wordSpacing.measure.worker.js
new file mode 100644
index 0000000000..3e850fcf3d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.wordSpacing.measure.worker.js
@@ -0,0 +1,50 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.drawing.style.wordSpacing.measure
+// Description:Testing if word spacing is working properly
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Testing if word spacing is working properly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertSame(ctx.letterSpacing, '0px', "ctx.letterSpacing", "'0px'");
+_assertSame(ctx.wordSpacing, '0px', "ctx.wordSpacing", "'0px'");
+var width_normal = ctx.measureText('Hello World, again').width;
+
+function test_word_spacing(value, difference_spacing, epsilon) {
+ ctx.wordSpacing = value;
+ _assertSame(ctx.letterSpacing, '0px', "ctx.letterSpacing", "'0px'");
+ _assertSame(ctx.wordSpacing, value, "ctx.wordSpacing", "value");
+ width_with_word_spacing = ctx.measureText('Hello World, again').width;
+ assert_approx_equals(width_with_word_spacing, width_normal + difference_spacing, epsilon, "word spacing doesn't work.");
+}
+
+// The first value is the word Spacing to be set, the second value the
+// change in length of string 'Hello World', note that there are 2 words
+// in 'Hello World, again', so the length difference is always wordSpacing * 2.
+// and the third value is the acceptable differencee for the length change,
+// note that unit such as 1cm/1mm doesn't map to an exact pixel value.
+test_cases = [['3px', 6, 0],
+ ['5px', 10, 0],
+ ['-2px', -4, 0],
+ ['1em', 20, 0],
+ ['1in', 192, 0],
+ ['-0.1cm', -7.57, 0.2],
+ ['-0.6mm', -4.54, 0.2]]
+
+for (const test_case of test_cases) {
+ test_word_spacing(test_case[0], test_case[1], test_case[2]);
+}
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.font.default.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.font.default.html
new file mode 100644
index 0000000000..191c1a5c31
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.font.default.html
@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.font.default</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.font.default</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertSame(ctx.font, '10px sans-serif', "ctx.font", "'10px sans-serif'");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.font.default.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.font.default.worker.js
new file mode 100644
index 0000000000..dc620ed439
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.font.default.worker.js
@@ -0,0 +1,23 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.font.default
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertSame(ctx.font, '10px sans-serif', "ctx.font", "'10px sans-serif'");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.font.parse.basic.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.font.parse.basic.html
new file mode 100644
index 0000000000..aee555656a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.font.parse.basic.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.font.parse.basic</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.font.parse.basic</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.font = '20px serif';
+_assertSame(ctx.font, '20px serif', "ctx.font", "'20px serif'");
+
+ctx.font = '20PX SERIF';
+_assertSame(ctx.font, '20px serif', "ctx.font", "'20px serif'");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.font.parse.basic.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.font.parse.basic.worker.js
new file mode 100644
index 0000000000..0d8a4aad32
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.font.parse.basic.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.font.parse.basic
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.font = '20px serif';
+_assertSame(ctx.font, '20px serif', "ctx.font", "'20px serif'");
+
+ctx.font = '20PX SERIF';
+_assertSame(ctx.font, '20px serif', "ctx.font", "'20px serif'");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.font.parse.complex.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.font.parse.complex.html
new file mode 100644
index 0000000000..361b44de1c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.font.parse.complex.html
@@ -0,0 +1,28 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.font.parse.complex</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.font.parse.complex</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.font = 'small-caps italic 400 12px/2 Unknown Font, sans-serif';
+_assertSame(ctx.font, 'italic small-caps 12px "Unknown Font", sans-serif', "ctx.font", "'italic small-caps 12px \"Unknown Font\", sans-serif'");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.font.parse.complex.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.font.parse.complex.worker.js
new file mode 100644
index 0000000000..3c05b6fb81
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.font.parse.complex.worker.js
@@ -0,0 +1,24 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.font.parse.complex
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.font = 'small-caps italic 400 12px/2 Unknown Font, sans-serif';
+_assertSame(ctx.font, 'italic small-caps 12px "Unknown Font", sans-serif', "ctx.font", "'italic small-caps 12px \"Unknown Font\", sans-serif'");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.font.parse.family.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.font.parse.family.html
new file mode 100644
index 0000000000..70127ba67c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.font.parse.family.html
@@ -0,0 +1,28 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.font.parse.family</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.font.parse.family</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.font = '20px cursive,fantasy,monospace,sans-serif,serif,UnquotedFont,"QuotedFont\\\\\\","';
+_assertSame(ctx.font, '20px cursive, fantasy, monospace, sans-serif, serif, UnquotedFont, "QuotedFont\\\\\\","', "ctx.font", "'20px cursive, fantasy, monospace, sans-serif, serif, UnquotedFont, \"QuotedFont\\\\\\\\\\\\\",\"'");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.font.parse.family.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.font.parse.family.worker.js
new file mode 100644
index 0000000000..7640de2be0
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.font.parse.family.worker.js
@@ -0,0 +1,24 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.font.parse.family
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.font = '20px cursive,fantasy,monospace,sans-serif,serif,UnquotedFont,"QuotedFont\\\\\\","';
+_assertSame(ctx.font, '20px cursive, fantasy, monospace, sans-serif, serif, UnquotedFont, "QuotedFont\\\\\\","', "ctx.font", "'20px cursive, fantasy, monospace, sans-serif, serif, UnquotedFont, \"QuotedFont\\\\\\\\\\\\\",\"'");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.font.parse.invalid.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.font.parse.invalid.html
new file mode 100644
index 0000000000..483476bcfa
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.font.parse.invalid.html
@@ -0,0 +1,72 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.font.parse.invalid</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.font.parse.invalid</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.font = '20px serif';
+_assertSame(ctx.font, '20px serif', "ctx.font", "'20px serif'");
+
+ctx.font = '20px serif';
+ctx.font = '';
+_assertSame(ctx.font, '20px serif', "ctx.font", "'20px serif'");
+
+ctx.font = '20px serif';
+ctx.font = 'bogus';
+_assertSame(ctx.font, '20px serif', "ctx.font", "'20px serif'");
+
+ctx.font = '20px serif';
+ctx.font = 'inherit';
+_assertSame(ctx.font, '20px serif', "ctx.font", "'20px serif'");
+
+ctx.font = '20px serif';
+ctx.font = '10px {bogus}';
+_assertSame(ctx.font, '20px serif', "ctx.font", "'20px serif'");
+
+ctx.font = '20px serif';
+ctx.font = '10px initial';
+_assertSame(ctx.font, '20px serif', "ctx.font", "'20px serif'");
+
+ctx.font = '20px serif';
+ctx.font = '10px default';
+_assertSame(ctx.font, '20px serif', "ctx.font", "'20px serif'");
+
+ctx.font = '20px serif';
+ctx.font = '10px inherit';
+_assertSame(ctx.font, '20px serif', "ctx.font", "'20px serif'");
+
+ctx.font = '20px serif';
+ctx.font = '10px revert';
+_assertSame(ctx.font, '20px serif', "ctx.font", "'20px serif'");
+
+ctx.font = '20px serif';
+ctx.font = 'var(--x)';
+_assertSame(ctx.font, '20px serif', "ctx.font", "'20px serif'");
+
+ctx.font = '20px serif';
+ctx.font = 'var(--x, 10px serif)';
+_assertSame(ctx.font, '20px serif', "ctx.font", "'20px serif'");
+
+ctx.font = '20px serif';
+ctx.font = '1em serif; background: green; margin: 10px';
+_assertSame(ctx.font, '20px serif', "ctx.font", "'20px serif'");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.font.parse.invalid.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.font.parse.invalid.worker.js
new file mode 100644
index 0000000000..a4e19a6887
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.font.parse.invalid.worker.js
@@ -0,0 +1,68 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.font.parse.invalid
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.font = '20px serif';
+_assertSame(ctx.font, '20px serif', "ctx.font", "'20px serif'");
+
+ctx.font = '20px serif';
+ctx.font = '';
+_assertSame(ctx.font, '20px serif', "ctx.font", "'20px serif'");
+
+ctx.font = '20px serif';
+ctx.font = 'bogus';
+_assertSame(ctx.font, '20px serif', "ctx.font", "'20px serif'");
+
+ctx.font = '20px serif';
+ctx.font = 'inherit';
+_assertSame(ctx.font, '20px serif', "ctx.font", "'20px serif'");
+
+ctx.font = '20px serif';
+ctx.font = '10px {bogus}';
+_assertSame(ctx.font, '20px serif', "ctx.font", "'20px serif'");
+
+ctx.font = '20px serif';
+ctx.font = '10px initial';
+_assertSame(ctx.font, '20px serif', "ctx.font", "'20px serif'");
+
+ctx.font = '20px serif';
+ctx.font = '10px default';
+_assertSame(ctx.font, '20px serif', "ctx.font", "'20px serif'");
+
+ctx.font = '20px serif';
+ctx.font = '10px inherit';
+_assertSame(ctx.font, '20px serif', "ctx.font", "'20px serif'");
+
+ctx.font = '20px serif';
+ctx.font = '10px revert';
+_assertSame(ctx.font, '20px serif', "ctx.font", "'20px serif'");
+
+ctx.font = '20px serif';
+ctx.font = 'var(--x)';
+_assertSame(ctx.font, '20px serif', "ctx.font", "'20px serif'");
+
+ctx.font = '20px serif';
+ctx.font = 'var(--x, 10px serif)';
+_assertSame(ctx.font, '20px serif', "ctx.font", "'20px serif'");
+
+ctx.font = '20px serif';
+ctx.font = '1em serif; background: green; margin: 10px';
+_assertSame(ctx.font, '20px serif', "ctx.font", "'20px serif'");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.font.parse.system.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.font.parse.system.html
new file mode 100644
index 0000000000..24cb730c22
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.font.parse.system.html
@@ -0,0 +1,28 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.font.parse.system</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.font.parse.system</h1>
+<p class="desc">System fonts must be computed to explicit values</p>
+
+
+<script>
+var t = async_test("System fonts must be computed to explicit values");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.font = 'message-box';
+_assertDifferent(ctx.font, 'message-box', "ctx.font", "'message-box'");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.font.parse.system.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.font.parse.system.worker.js
new file mode 100644
index 0000000000..5c2a8b481a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.font.parse.system.worker.js
@@ -0,0 +1,24 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.font.parse.system
+// Description:System fonts must be computed to explicit values
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("System fonts must be computed to explicit values");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.font = 'message-box';
+_assertDifferent(ctx.font, 'message-box', "ctx.font", "'message-box'");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.font.parse.tiny.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.font.parse.tiny.html
new file mode 100644
index 0000000000..6c17ad47b6
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.font.parse.tiny.html
@@ -0,0 +1,28 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.font.parse.tiny</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.font.parse.tiny</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.font = '1px sans-serif';
+_assertSame(ctx.font, '1px sans-serif', "ctx.font", "'1px sans-serif'");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.font.parse.tiny.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.font.parse.tiny.worker.js
new file mode 100644
index 0000000000..2171e2cdcc
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.font.parse.tiny.worker.js
@@ -0,0 +1,24 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.font.parse.tiny
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.font = '1px sans-serif';
+_assertSame(ctx.font, '1px sans-serif', "ctx.font", "'1px sans-serif'");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.font.relative_size.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.font.relative_size.html
new file mode 100644
index 0000000000..eef3be79c7
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.font.relative_size.html
@@ -0,0 +1,28 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.font.relative_size</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.font.relative_size</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.font = '1em sans-serif';
+_assertSame(ctx.font, '10px sans-serif', "ctx.font", "'10px sans-serif'");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.font.relative_size.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.font.relative_size.worker.js
new file mode 100644
index 0000000000..c4d78b8bcc
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.font.relative_size.worker.js
@@ -0,0 +1,24 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.font.relative_size
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.font = '1em sans-serif';
+_assertSame(ctx.font, '10px sans-serif', "ctx.font", "'10px sans-serif'");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.measure.actualBoundingBox.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.measure.actualBoundingBox.html
new file mode 100644
index 0000000000..b7ce281b41
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.measure.actualBoundingBox.html
@@ -0,0 +1,55 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.measure.actualBoundingBox</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.measure.actualBoundingBox</h1>
+<p class="desc">Testing actualBoundingBox for OffscreenCanvas</p>
+
+
+<script>
+var t = async_test("Testing actualBoundingBox for OffscreenCanvas");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '50px CanvasTest';
+ ctx.direction = 'ltr';
+ ctx.align = 'left'
+ ctx.baseline = 'alphabetic'
+ // Some platforms may return '-0'.
+ _assertSame(Math.abs(ctx.measureText('A').actualBoundingBoxLeft), 0, "Math.abs(ctx.measureText('A').actualBoundingBoxLeft)", "0");
+ // Different platforms may render text slightly different.
+ _assert(ctx.measureText('A').actualBoundingBoxRight >= 50, "ctx.measureText('A').actualBoundingBoxRight >= 50");
+ _assert(ctx.measureText('A').actualBoundingBoxAscent >= 35, "ctx.measureText('A').actualBoundingBoxAscent >= 35");
+ _assertSame(Math.abs(ctx.measureText('A').actualBoundingBoxDescent), 0, "Math.abs(ctx.measureText('A').actualBoundingBoxDescent)", "0");
+
+ _assert(ctx.measureText('D').actualBoundingBoxLeft >= 48, "ctx.measureText('D').actualBoundingBoxLeft >= 48");
+ _assert(ctx.measureText('D').actualBoundingBoxLeft <= 52, "ctx.measureText('D').actualBoundingBoxLeft <= 52");
+ _assert(ctx.measureText('D').actualBoundingBoxRight >= 75, "ctx.measureText('D').actualBoundingBoxRight >= 75");
+ _assert(ctx.measureText('D').actualBoundingBoxRight <= 80, "ctx.measureText('D').actualBoundingBoxRight <= 80");
+ _assert(ctx.measureText('D').actualBoundingBoxAscent >= 35, "ctx.measureText('D').actualBoundingBoxAscent >= 35");
+ _assert(ctx.measureText('D').actualBoundingBoxAscent <= 40, "ctx.measureText('D').actualBoundingBoxAscent <= 40");
+ _assert(ctx.measureText('D').actualBoundingBoxDescent >= 12, "ctx.measureText('D').actualBoundingBoxDescent >= 12");
+ _assert(ctx.measureText('D').actualBoundingBoxDescent <= 15, "ctx.measureText('D').actualBoundingBoxDescent <= 15");
+
+ _assertSame(Math.abs(ctx.measureText('ABCD').actualBoundingBoxLeft), 0, "Math.abs(ctx.measureText('ABCD').actualBoundingBoxLeft)", "0");
+ _assert(ctx.measureText('ABCD').actualBoundingBoxRight >= 200, "ctx.measureText('ABCD').actualBoundingBoxRight >= 200");
+ _assert(ctx.measureText('ABCD').actualBoundingBoxAscent >= 85, "ctx.measureText('ABCD').actualBoundingBoxAscent >= 85");
+ _assert(ctx.measureText('ABCD').actualBoundingBoxDescent >= 37, "ctx.measureText('ABCD').actualBoundingBoxDescent >= 37");
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.measure.actualBoundingBox.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.measure.actualBoundingBox.worker.js
new file mode 100644
index 0000000000..4693bb6984
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.measure.actualBoundingBox.worker.js
@@ -0,0 +1,51 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.measure.actualBoundingBox
+// Description:Testing actualBoundingBox for OffscreenCanvas
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Testing actualBoundingBox for OffscreenCanvas");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '50px CanvasTest';
+ ctx.direction = 'ltr';
+ ctx.align = 'left'
+ ctx.baseline = 'alphabetic'
+ // Some platforms may return '-0'.
+ _assertSame(Math.abs(ctx.measureText('A').actualBoundingBoxLeft), 0, "Math.abs(ctx.measureText('A').actualBoundingBoxLeft)", "0");
+ // Different platforms may render text slightly different.
+ _assert(ctx.measureText('A').actualBoundingBoxRight >= 50, "ctx.measureText('A').actualBoundingBoxRight >= 50");
+ _assert(ctx.measureText('A').actualBoundingBoxAscent >= 35, "ctx.measureText('A').actualBoundingBoxAscent >= 35");
+ _assertSame(Math.abs(ctx.measureText('A').actualBoundingBoxDescent), 0, "Math.abs(ctx.measureText('A').actualBoundingBoxDescent)", "0");
+
+ _assert(ctx.measureText('D').actualBoundingBoxLeft >= 48, "ctx.measureText('D').actualBoundingBoxLeft >= 48");
+ _assert(ctx.measureText('D').actualBoundingBoxLeft <= 52, "ctx.measureText('D').actualBoundingBoxLeft <= 52");
+ _assert(ctx.measureText('D').actualBoundingBoxRight >= 75, "ctx.measureText('D').actualBoundingBoxRight >= 75");
+ _assert(ctx.measureText('D').actualBoundingBoxRight <= 80, "ctx.measureText('D').actualBoundingBoxRight <= 80");
+ _assert(ctx.measureText('D').actualBoundingBoxAscent >= 35, "ctx.measureText('D').actualBoundingBoxAscent >= 35");
+ _assert(ctx.measureText('D').actualBoundingBoxAscent <= 40, "ctx.measureText('D').actualBoundingBoxAscent <= 40");
+ _assert(ctx.measureText('D').actualBoundingBoxDescent >= 12, "ctx.measureText('D').actualBoundingBoxDescent >= 12");
+ _assert(ctx.measureText('D').actualBoundingBoxDescent <= 15, "ctx.measureText('D').actualBoundingBoxDescent <= 15");
+
+ _assertSame(Math.abs(ctx.measureText('ABCD').actualBoundingBoxLeft), 0, "Math.abs(ctx.measureText('ABCD').actualBoundingBoxLeft)", "0");
+ _assert(ctx.measureText('ABCD').actualBoundingBoxRight >= 200, "ctx.measureText('ABCD').actualBoundingBoxRight >= 200");
+ _assert(ctx.measureText('ABCD').actualBoundingBoxAscent >= 85, "ctx.measureText('ABCD').actualBoundingBoxAscent >= 85");
+ _assert(ctx.measureText('ABCD').actualBoundingBoxDescent >= 37, "ctx.measureText('ABCD').actualBoundingBoxDescent >= 37");
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.measure.advances.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.measure.advances.html
new file mode 100644
index 0000000000..ed3affcda5
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.measure.advances.html
@@ -0,0 +1,48 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.measure.advances</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.measure.advances</h1>
+<p class="desc">Testing width advances for OffscreenCanvas</p>
+
+
+<script>
+var t = async_test("Testing width advances for OffscreenCanvas");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '50px CanvasTest';
+ ctx.direction = 'ltr';
+ ctx.align = 'left'
+ // Some platforms may return '-0'.
+ _assertSame(Math.abs(ctx.measureText('Hello').advances[0]), 0, "Math.abs(ctx.measureText('Hello').advances[\""+(0)+"\"])", "0");
+ // Different platforms may render text slightly different.
+ _assert(ctx.measureText('Hello').advances[1] >= 36, "ctx.measureText('Hello').advances[\""+(1)+"\"] >= 36");
+ _assert(ctx.measureText('Hello').advances[2] >= 58, "ctx.measureText('Hello').advances[\""+(2)+"\"] >= 58");
+ _assert(ctx.measureText('Hello').advances[3] >= 70, "ctx.measureText('Hello').advances[\""+(3)+"\"] >= 70");
+ _assert(ctx.measureText('Hello').advances[4] >= 80, "ctx.measureText('Hello').advances[\""+(4)+"\"] >= 80");
+
+ var tm = ctx.measureText('Hello');
+ _assertSame(ctx.measureText('Hello').advances[0], tm.advances[0], "ctx.measureText('Hello').advances[\""+(0)+"\"]", "tm.advances[\""+(0)+"\"]");
+ _assertSame(ctx.measureText('Hello').advances[1], tm.advances[1], "ctx.measureText('Hello').advances[\""+(1)+"\"]", "tm.advances[\""+(1)+"\"]");
+ _assertSame(ctx.measureText('Hello').advances[2], tm.advances[2], "ctx.measureText('Hello').advances[\""+(2)+"\"]", "tm.advances[\""+(2)+"\"]");
+ _assertSame(ctx.measureText('Hello').advances[3], tm.advances[3], "ctx.measureText('Hello').advances[\""+(3)+"\"]", "tm.advances[\""+(3)+"\"]");
+ _assertSame(ctx.measureText('Hello').advances[4], tm.advances[4], "ctx.measureText('Hello').advances[\""+(4)+"\"]", "tm.advances[\""+(4)+"\"]");
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.measure.advances.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.measure.advances.worker.js
new file mode 100644
index 0000000000..f1d4bb98f9
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.measure.advances.worker.js
@@ -0,0 +1,44 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.measure.advances
+// Description:Testing width advances for OffscreenCanvas
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Testing width advances for OffscreenCanvas");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '50px CanvasTest';
+ ctx.direction = 'ltr';
+ ctx.align = 'left'
+ // Some platforms may return '-0'.
+ _assertSame(Math.abs(ctx.measureText('Hello').advances[0]), 0, "Math.abs(ctx.measureText('Hello').advances[\""+(0)+"\"])", "0");
+ // Different platforms may render text slightly different.
+ _assert(ctx.measureText('Hello').advances[1] >= 36, "ctx.measureText('Hello').advances[\""+(1)+"\"] >= 36");
+ _assert(ctx.measureText('Hello').advances[2] >= 58, "ctx.measureText('Hello').advances[\""+(2)+"\"] >= 58");
+ _assert(ctx.measureText('Hello').advances[3] >= 70, "ctx.measureText('Hello').advances[\""+(3)+"\"] >= 70");
+ _assert(ctx.measureText('Hello').advances[4] >= 80, "ctx.measureText('Hello').advances[\""+(4)+"\"] >= 80");
+
+ var tm = ctx.measureText('Hello');
+ _assertSame(ctx.measureText('Hello').advances[0], tm.advances[0], "ctx.measureText('Hello').advances[\""+(0)+"\"]", "tm.advances[\""+(0)+"\"]");
+ _assertSame(ctx.measureText('Hello').advances[1], tm.advances[1], "ctx.measureText('Hello').advances[\""+(1)+"\"]", "tm.advances[\""+(1)+"\"]");
+ _assertSame(ctx.measureText('Hello').advances[2], tm.advances[2], "ctx.measureText('Hello').advances[\""+(2)+"\"]", "tm.advances[\""+(2)+"\"]");
+ _assertSame(ctx.measureText('Hello').advances[3], tm.advances[3], "ctx.measureText('Hello').advances[\""+(3)+"\"]", "tm.advances[\""+(3)+"\"]");
+ _assertSame(ctx.measureText('Hello').advances[4], tm.advances[4], "ctx.measureText('Hello').advances[\""+(4)+"\"]", "tm.advances[\""+(4)+"\"]");
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.measure.baselines.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.measure.baselines.html
new file mode 100644
index 0000000000..993fbb0822
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.measure.baselines.html
@@ -0,0 +1,41 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.measure.baselines</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.measure.baselines</h1>
+<p class="desc">Testing baselines for OffscreenCanvas</p>
+
+
+<script>
+var t = async_test("Testing baselines for OffscreenCanvas");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '50px CanvasTest';
+ ctx.direction = 'ltr';
+ ctx.align = 'left'
+ _assertSame(Math.abs(ctx.measureText('A').getBaselines().alphabetic), 0, "Math.abs(ctx.measureText('A').getBaselines().alphabetic)", "0");
+ _assertSame(ctx.measureText('A').getBaselines().ideographic, -39, "ctx.measureText('A').getBaselines().ideographic", "-39");
+ _assertSame(ctx.measureText('A').getBaselines().hanging, 68, "ctx.measureText('A').getBaselines().hanging", "68");
+
+ _assertSame(Math.abs(ctx.measureText('ABCD').getBaselines().alphabetic), 0, "Math.abs(ctx.measureText('ABCD').getBaselines().alphabetic)", "0");
+ _assertSame(ctx.measureText('ABCD').getBaselines().ideographic, -39, "ctx.measureText('ABCD').getBaselines().ideographic", "-39");
+ _assertSame(ctx.measureText('ABCD').getBaselines().hanging, 68, "ctx.measureText('ABCD').getBaselines().hanging", "68");
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.measure.baselines.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.measure.baselines.worker.js
new file mode 100644
index 0000000000..0c060169d3
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.measure.baselines.worker.js
@@ -0,0 +1,37 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.measure.baselines
+// Description:Testing baselines for OffscreenCanvas
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Testing baselines for OffscreenCanvas");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '50px CanvasTest';
+ ctx.direction = 'ltr';
+ ctx.align = 'left'
+ _assertSame(Math.abs(ctx.measureText('A').getBaselines().alphabetic), 0, "Math.abs(ctx.measureText('A').getBaselines().alphabetic)", "0");
+ _assertSame(ctx.measureText('A').getBaselines().ideographic, -39, "ctx.measureText('A').getBaselines().ideographic", "-39");
+ _assertSame(ctx.measureText('A').getBaselines().hanging, 68, "ctx.measureText('A').getBaselines().hanging", "68");
+
+ _assertSame(Math.abs(ctx.measureText('ABCD').getBaselines().alphabetic), 0, "Math.abs(ctx.measureText('ABCD').getBaselines().alphabetic)", "0");
+ _assertSame(ctx.measureText('ABCD').getBaselines().ideographic, -39, "ctx.measureText('ABCD').getBaselines().ideographic", "-39");
+ _assertSame(ctx.measureText('ABCD').getBaselines().hanging, 68, "ctx.measureText('ABCD').getBaselines().hanging", "68");
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.measure.emHeights.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.measure.emHeights.html
new file mode 100644
index 0000000000..cc91f4017c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.measure.emHeights.html
@@ -0,0 +1,41 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.measure.emHeights</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.measure.emHeights</h1>
+<p class="desc">Testing emHeights for OffscreenCanvas</p>
+
+
+<script>
+var t = async_test("Testing emHeights for OffscreenCanvas");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '50px CanvasTest';
+ ctx.direction = 'ltr';
+ ctx.align = 'left'
+ _assertSame(ctx.measureText('A').emHeightAscent, 37.5, "ctx.measureText('A').emHeightAscent", "37.5");
+ _assertSame(ctx.measureText('A').emHeightDescent, 12.5, "ctx.measureText('A').emHeightDescent", "12.5");
+ _assertSame(ctx.measureText('A').emHeightDescent + ctx.measureText('A').emHeightAscent, 50, "ctx.measureText('A').emHeightDescent + ctx.measureText('A').emHeightAscent", "50");
+
+ _assertSame(ctx.measureText('ABCD').emHeightAscent, 37.5, "ctx.measureText('ABCD').emHeightAscent", "37.5");
+ _assertSame(ctx.measureText('ABCD').emHeightDescent, 12.5, "ctx.measureText('ABCD').emHeightDescent", "12.5");
+ _assertSame(ctx.measureText('ABCD').emHeightDescent + ctx.measureText('ABCD').emHeightAscent, 50, "ctx.measureText('ABCD').emHeightDescent + ctx.measureText('ABCD').emHeightAscent", "50");
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.measure.emHeights.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.measure.emHeights.worker.js
new file mode 100644
index 0000000000..88432343d1
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.measure.emHeights.worker.js
@@ -0,0 +1,37 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.measure.emHeights
+// Description:Testing emHeights for OffscreenCanvas
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Testing emHeights for OffscreenCanvas");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '50px CanvasTest';
+ ctx.direction = 'ltr';
+ ctx.align = 'left'
+ _assertSame(ctx.measureText('A').emHeightAscent, 37.5, "ctx.measureText('A').emHeightAscent", "37.5");
+ _assertSame(ctx.measureText('A').emHeightDescent, 12.5, "ctx.measureText('A').emHeightDescent", "12.5");
+ _assertSame(ctx.measureText('A').emHeightDescent + ctx.measureText('A').emHeightAscent, 50, "ctx.measureText('A').emHeightDescent + ctx.measureText('A').emHeightAscent", "50");
+
+ _assertSame(ctx.measureText('ABCD').emHeightAscent, 37.5, "ctx.measureText('ABCD').emHeightAscent", "37.5");
+ _assertSame(ctx.measureText('ABCD').emHeightDescent, 12.5, "ctx.measureText('ABCD').emHeightDescent", "12.5");
+ _assertSame(ctx.measureText('ABCD').emHeightDescent + ctx.measureText('ABCD').emHeightAscent, 50, "ctx.measureText('ABCD').emHeightDescent + ctx.measureText('ABCD').emHeightAscent", "50");
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.measure.fontBoundingBox.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.measure.fontBoundingBox.html
new file mode 100644
index 0000000000..fca062b649
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.measure.fontBoundingBox.html
@@ -0,0 +1,39 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.measure.fontBoundingBox</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.measure.fontBoundingBox</h1>
+<p class="desc">Testing fontBoundingBox for OffscreenCanvas</p>
+
+
+<script>
+var t = async_test("Testing fontBoundingBox for OffscreenCanvas");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '50px CanvasTest';
+ ctx.direction = 'ltr';
+ ctx.align = 'left'
+ _assertSame(ctx.measureText('A').fontBoundingBoxAscent, 85, "ctx.measureText('A').fontBoundingBoxAscent", "85");
+ _assertSame(ctx.measureText('A').fontBoundingBoxDescent, 39, "ctx.measureText('A').fontBoundingBoxDescent", "39");
+
+ _assertSame(ctx.measureText('ABCD').fontBoundingBoxAscent, 85, "ctx.measureText('ABCD').fontBoundingBoxAscent", "85");
+ _assertSame(ctx.measureText('ABCD').fontBoundingBoxDescent, 39, "ctx.measureText('ABCD').fontBoundingBoxDescent", "39");
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.measure.fontBoundingBox.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.measure.fontBoundingBox.worker.js
new file mode 100644
index 0000000000..2f4b64d37a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.measure.fontBoundingBox.worker.js
@@ -0,0 +1,35 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.measure.fontBoundingBox
+// Description:Testing fontBoundingBox for OffscreenCanvas
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Testing fontBoundingBox for OffscreenCanvas");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '50px CanvasTest';
+ ctx.direction = 'ltr';
+ ctx.align = 'left'
+ _assertSame(ctx.measureText('A').fontBoundingBoxAscent, 85, "ctx.measureText('A').fontBoundingBoxAscent", "85");
+ _assertSame(ctx.measureText('A').fontBoundingBoxDescent, 39, "ctx.measureText('A').fontBoundingBoxDescent", "39");
+
+ _assertSame(ctx.measureText('ABCD').fontBoundingBoxAscent, 85, "ctx.measureText('ABCD').fontBoundingBoxAscent", "85");
+ _assertSame(ctx.measureText('ABCD').fontBoundingBoxDescent, 39, "ctx.measureText('ABCD').fontBoundingBoxDescent", "39");
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.measure.width.basic.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.measure.width.basic.html
new file mode 100644
index 0000000000..074d62eec9
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.measure.width.basic.html
@@ -0,0 +1,38 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.measure.width.basic</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.measure.width.basic</h1>
+<p class="desc">The width of character is same as font used for OffscreenCanvas</p>
+
+
+<script>
+var t = async_test("The width of character is same as font used for OffscreenCanvas");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '50px CanvasTest';
+ _assertSame(ctx.measureText('A').width, 50, "ctx.measureText('A').width", "50");
+ _assertSame(ctx.measureText('AA').width, 100, "ctx.measureText('AA').width", "100");
+ _assertSame(ctx.measureText('ABCD').width, 200, "ctx.measureText('ABCD').width", "200");
+
+ ctx.font = '100px CanvasTest';
+ _assertSame(ctx.measureText('A').width, 100, "ctx.measureText('A').width", "100");
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.measure.width.basic.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.measure.width.basic.worker.js
new file mode 100644
index 0000000000..a1933c82c2
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.measure.width.basic.worker.js
@@ -0,0 +1,34 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.measure.width.basic
+// Description:The width of character is same as font used for OffscreenCanvas
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("The width of character is same as font used for OffscreenCanvas");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '50px CanvasTest';
+ _assertSame(ctx.measureText('A').width, 50, "ctx.measureText('A').width", "50");
+ _assertSame(ctx.measureText('AA').width, 100, "ctx.measureText('AA').width", "100");
+ _assertSame(ctx.measureText('ABCD').width, 200, "ctx.measureText('ABCD').width", "200");
+
+ ctx.font = '100px CanvasTest';
+ _assertSame(ctx.measureText('A').width, 100, "ctx.measureText('A').width", "100");
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.measure.width.empty.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.measure.width.empty.html
new file mode 100644
index 0000000000..45792b41dd
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.measure.width.empty.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.measure.width.empty</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.measure.width.empty</h1>
+<p class="desc">The empty string has zero width for OffscreenCanvas</p>
+
+
+<script>
+var t = async_test("The empty string has zero width for OffscreenCanvas");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '50px CanvasTest';
+ _assertSame(ctx.measureText("").width, 0, "ctx.measureText(\"\").width", "0");
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.measure.width.empty.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.measure.width.empty.worker.js
new file mode 100644
index 0000000000..8d806c16cc
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.measure.width.empty.worker.js
@@ -0,0 +1,29 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.measure.width.empty
+// Description:The empty string has zero width for OffscreenCanvas
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("The empty string has zero width for OffscreenCanvas");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '50px CanvasTest';
+ _assertSame(ctx.measureText("").width, 0, "ctx.measureText(\"\").width", "0");
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.measure.width.space.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.measure.width.space.html
new file mode 100644
index 0000000000..971a41e293
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.measure.width.space.html
@@ -0,0 +1,39 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.measure.width.space</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.measure.width.space</h1>
+<p class="desc">Space characters are converted to U+0020 and collapsed (per CSS) for OffscreenCanvas</p>
+
+
+<script>
+var t = async_test("Space characters are converted to U+0020 and collapsed (per CSS) for OffscreenCanvas");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '50px CanvasTest';
+ _assertSame(ctx.measureText('A B').width, 150, "ctx.measureText('A B').width", "150");
+ _assertSame(ctx.measureText('A B').width, 200, "ctx.measureText('A B').width", "200");
+ _assertSame(ctx.measureText('A \x09\x0a\x0c\x0d \x09\x0a\x0c\x0dB').width, 150, "ctx.measureText('A \\x09\\x0a\\x0c\\x0d \\x09\\x0a\\x0c\\x0dB').width", "150");
+ _assert(ctx.measureText('A \x0b B').width >= 200, "ctx.measureText('A \\x0b B').width >= 200");
+
+ _assertSame(ctx.measureText(' AB').width, 100, "ctx.measureText(' AB').width", "100");
+ _assertSame(ctx.measureText('AB ').width, 100, "ctx.measureText('AB ').width", "100");
+}).then(t_pass, t_fail);
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.measure.width.space.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.measure.width.space.worker.js
new file mode 100644
index 0000000000..a52c1d8367
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.measure.width.space.worker.js
@@ -0,0 +1,35 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.measure.width.space
+// Description:Space characters are converted to U+0020 and collapsed (per CSS) for OffscreenCanvas
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Space characters are converted to U+0020 and collapsed (per CSS) for OffscreenCanvas");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')");
+let fonts = (self.fonts ? self.fonts : document.fonts);
+f.load();
+fonts.add(f);
+fonts.ready.then(function() {
+ ctx.font = '50px CanvasTest';
+ _assertSame(ctx.measureText('A B').width, 150, "ctx.measureText('A B').width", "150");
+ _assertSame(ctx.measureText('A B').width, 200, "ctx.measureText('A B').width", "200");
+ _assertSame(ctx.measureText('A \x09\x0a\x0c\x0d \x09\x0a\x0c\x0dB').width, 150, "ctx.measureText('A \\x09\\x0a\\x0c\\x0d \\x09\\x0a\\x0c\\x0dB').width", "150");
+ _assert(ctx.measureText('A \x0b B').width >= 200, "ctx.measureText('A \\x0b B').width >= 200");
+
+ _assertSame(ctx.measureText(' AB').width, 100, "ctx.measureText(' AB').width", "100");
+ _assertSame(ctx.measureText('AB ').width, 100, "ctx.measureText('AB ').width", "100");
+}).then(t_pass, t_fail);
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.setFont.mathFont.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.setFont.mathFont.html
new file mode 100644
index 0000000000..ed4752dfcb
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.setFont.mathFont.html
@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.setFont.mathFont</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.setFont.mathFont</h1>
+<p class="desc">crbug.com/1212190, make sure offscreencanvas doesn't crash with Math Font</p>
+
+
+<script>
+var t = async_test("crbug.com/1212190, make sure offscreencanvas doesn't crash with Math Font");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.font = "math serif";
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.setFont.mathFont.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.setFont.mathFont.worker.js
new file mode 100644
index 0000000000..39e3031ecf
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.setFont.mathFont.worker.js
@@ -0,0 +1,23 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.setFont.mathFont
+// Description:crbug.com/1212190, make sure offscreencanvas doesn't crash with Math Font
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("crbug.com/1212190, make sure offscreencanvas doesn't crash with Math Font");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.font = "math serif";
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.bitmap.html b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.bitmap.html
new file mode 100644
index 0000000000..3a6e67b77e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.bitmap.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.state.saverestore.bitmap</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.state.saverestore.bitmap</h1>
+<p class="desc">save()/restore() does not affect the current bitmap</p>
+
+
+<script>
+var t = async_test("save()/restore() does not affect the current bitmap");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.save();
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.restore();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.bitmap.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.bitmap.worker.js
new file mode 100644
index 0000000000..c602488d36
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.bitmap.worker.js
@@ -0,0 +1,29 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.state.saverestore.bitmap
+// Description:save()/restore() does not affect the current bitmap
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("save()/restore() does not affect the current bitmap");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.save();
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.restore();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.clip.html b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.clip.html
new file mode 100644
index 0000000000..e96df9e2a4
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.clip.html
@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.state.saverestore.clip</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.state.saverestore.clip</h1>
+<p class="desc">save()/restore() affects the clipping path</p>
+
+
+<script>
+var t = async_test("save()/restore() affects the clipping path");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.save();
+ctx.rect(0, 0, 1, 1);
+ctx.clip();
+ctx.restore();
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.clip.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.clip.worker.js
new file mode 100644
index 0000000000..622d941677
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.clip.worker.js
@@ -0,0 +1,31 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.state.saverestore.clip
+// Description:save()/restore() affects the clipping path
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("save()/restore() affects the clipping path");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.save();
+ctx.rect(0, 0, 1, 1);
+ctx.clip();
+ctx.restore();
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.fillStyle.html b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.fillStyle.html
new file mode 100644
index 0000000000..91b23bd47a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.fillStyle.html
@@ -0,0 +1,41 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.state.saverestore.fillStyle</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.state.saverestore.fillStyle</h1>
+<p class="desc">save()/restore() works for fillStyle</p>
+
+
+<script>
+var t = async_test("save()/restore() works for fillStyle");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+// Test that restore() undoes any modifications
+var old = ctx.fillStyle;
+ctx.save();
+ctx.fillStyle = "#ff0000";
+ctx.restore();
+_assertSame(ctx.fillStyle, old, "ctx.fillStyle", "old");
+
+// Also test that save() doesn't modify the values
+ctx.fillStyle = "#ff0000";
+old = ctx.fillStyle;
+ // we're not interested in failures caused by get(set(x)) != x (e.g.
+ // from rounding), so compare against 'old' instead of against "#ff0000"
+ctx.save();
+_assertSame(ctx.fillStyle, old, "ctx.fillStyle", "old");
+ctx.restore();
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.fillStyle.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.fillStyle.worker.js
new file mode 100644
index 0000000000..fa4d77328a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.fillStyle.worker.js
@@ -0,0 +1,37 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.state.saverestore.fillStyle
+// Description:save()/restore() works for fillStyle
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("save()/restore() works for fillStyle");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+// Test that restore() undoes any modifications
+var old = ctx.fillStyle;
+ctx.save();
+ctx.fillStyle = "#ff0000";
+ctx.restore();
+_assertSame(ctx.fillStyle, old, "ctx.fillStyle", "old");
+
+// Also test that save() doesn't modify the values
+ctx.fillStyle = "#ff0000";
+old = ctx.fillStyle;
+ // we're not interested in failures caused by get(set(x)) != x (e.g.
+ // from rounding), so compare against 'old' instead of against "#ff0000"
+ctx.save();
+_assertSame(ctx.fillStyle, old, "ctx.fillStyle", "old");
+ctx.restore();
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.globalAlpha.html b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.globalAlpha.html
new file mode 100644
index 0000000000..01b9616bad
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.globalAlpha.html
@@ -0,0 +1,41 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.state.saverestore.globalAlpha</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.state.saverestore.globalAlpha</h1>
+<p class="desc">save()/restore() works for globalAlpha</p>
+
+
+<script>
+var t = async_test("save()/restore() works for globalAlpha");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+// Test that restore() undoes any modifications
+var old = ctx.globalAlpha;
+ctx.save();
+ctx.globalAlpha = 0.5;
+ctx.restore();
+_assertSame(ctx.globalAlpha, old, "ctx.globalAlpha", "old");
+
+// Also test that save() doesn't modify the values
+ctx.globalAlpha = 0.5;
+old = ctx.globalAlpha;
+ // we're not interested in failures caused by get(set(x)) != x (e.g.
+ // from rounding), so compare against 'old' instead of against 0.5
+ctx.save();
+_assertSame(ctx.globalAlpha, old, "ctx.globalAlpha", "old");
+ctx.restore();
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.globalAlpha.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.globalAlpha.worker.js
new file mode 100644
index 0000000000..8b11054673
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.globalAlpha.worker.js
@@ -0,0 +1,37 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.state.saverestore.globalAlpha
+// Description:save()/restore() works for globalAlpha
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("save()/restore() works for globalAlpha");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+// Test that restore() undoes any modifications
+var old = ctx.globalAlpha;
+ctx.save();
+ctx.globalAlpha = 0.5;
+ctx.restore();
+_assertSame(ctx.globalAlpha, old, "ctx.globalAlpha", "old");
+
+// Also test that save() doesn't modify the values
+ctx.globalAlpha = 0.5;
+old = ctx.globalAlpha;
+ // we're not interested in failures caused by get(set(x)) != x (e.g.
+ // from rounding), so compare against 'old' instead of against 0.5
+ctx.save();
+_assertSame(ctx.globalAlpha, old, "ctx.globalAlpha", "old");
+ctx.restore();
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.globalCompositeOperation.html b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.globalCompositeOperation.html
new file mode 100644
index 0000000000..557d3c074a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.globalCompositeOperation.html
@@ -0,0 +1,41 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.state.saverestore.globalCompositeOperation</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.state.saverestore.globalCompositeOperation</h1>
+<p class="desc">save()/restore() works for globalCompositeOperation</p>
+
+
+<script>
+var t = async_test("save()/restore() works for globalCompositeOperation");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+// Test that restore() undoes any modifications
+var old = ctx.globalCompositeOperation;
+ctx.save();
+ctx.globalCompositeOperation = "copy";
+ctx.restore();
+_assertSame(ctx.globalCompositeOperation, old, "ctx.globalCompositeOperation", "old");
+
+// Also test that save() doesn't modify the values
+ctx.globalCompositeOperation = "copy";
+old = ctx.globalCompositeOperation;
+ // we're not interested in failures caused by get(set(x)) != x (e.g.
+ // from rounding), so compare against 'old' instead of against "copy"
+ctx.save();
+_assertSame(ctx.globalCompositeOperation, old, "ctx.globalCompositeOperation", "old");
+ctx.restore();
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.globalCompositeOperation.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.globalCompositeOperation.worker.js
new file mode 100644
index 0000000000..3534147b92
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.globalCompositeOperation.worker.js
@@ -0,0 +1,37 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.state.saverestore.globalCompositeOperation
+// Description:save()/restore() works for globalCompositeOperation
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("save()/restore() works for globalCompositeOperation");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+// Test that restore() undoes any modifications
+var old = ctx.globalCompositeOperation;
+ctx.save();
+ctx.globalCompositeOperation = "copy";
+ctx.restore();
+_assertSame(ctx.globalCompositeOperation, old, "ctx.globalCompositeOperation", "old");
+
+// Also test that save() doesn't modify the values
+ctx.globalCompositeOperation = "copy";
+old = ctx.globalCompositeOperation;
+ // we're not interested in failures caused by get(set(x)) != x (e.g.
+ // from rounding), so compare against 'old' instead of against "copy"
+ctx.save();
+_assertSame(ctx.globalCompositeOperation, old, "ctx.globalCompositeOperation", "old");
+ctx.restore();
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.lineCap.html b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.lineCap.html
new file mode 100644
index 0000000000..e02cbd46dd
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.lineCap.html
@@ -0,0 +1,41 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.state.saverestore.lineCap</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.state.saverestore.lineCap</h1>
+<p class="desc">save()/restore() works for lineCap</p>
+
+
+<script>
+var t = async_test("save()/restore() works for lineCap");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+// Test that restore() undoes any modifications
+var old = ctx.lineCap;
+ctx.save();
+ctx.lineCap = "round";
+ctx.restore();
+_assertSame(ctx.lineCap, old, "ctx.lineCap", "old");
+
+// Also test that save() doesn't modify the values
+ctx.lineCap = "round";
+old = ctx.lineCap;
+ // we're not interested in failures caused by get(set(x)) != x (e.g.
+ // from rounding), so compare against 'old' instead of against "round"
+ctx.save();
+_assertSame(ctx.lineCap, old, "ctx.lineCap", "old");
+ctx.restore();
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.lineCap.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.lineCap.worker.js
new file mode 100644
index 0000000000..70de46a604
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.lineCap.worker.js
@@ -0,0 +1,37 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.state.saverestore.lineCap
+// Description:save()/restore() works for lineCap
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("save()/restore() works for lineCap");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+// Test that restore() undoes any modifications
+var old = ctx.lineCap;
+ctx.save();
+ctx.lineCap = "round";
+ctx.restore();
+_assertSame(ctx.lineCap, old, "ctx.lineCap", "old");
+
+// Also test that save() doesn't modify the values
+ctx.lineCap = "round";
+old = ctx.lineCap;
+ // we're not interested in failures caused by get(set(x)) != x (e.g.
+ // from rounding), so compare against 'old' instead of against "round"
+ctx.save();
+_assertSame(ctx.lineCap, old, "ctx.lineCap", "old");
+ctx.restore();
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.lineJoin.html b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.lineJoin.html
new file mode 100644
index 0000000000..92100e9d1f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.lineJoin.html
@@ -0,0 +1,41 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.state.saverestore.lineJoin</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.state.saverestore.lineJoin</h1>
+<p class="desc">save()/restore() works for lineJoin</p>
+
+
+<script>
+var t = async_test("save()/restore() works for lineJoin");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+// Test that restore() undoes any modifications
+var old = ctx.lineJoin;
+ctx.save();
+ctx.lineJoin = "round";
+ctx.restore();
+_assertSame(ctx.lineJoin, old, "ctx.lineJoin", "old");
+
+// Also test that save() doesn't modify the values
+ctx.lineJoin = "round";
+old = ctx.lineJoin;
+ // we're not interested in failures caused by get(set(x)) != x (e.g.
+ // from rounding), so compare against 'old' instead of against "round"
+ctx.save();
+_assertSame(ctx.lineJoin, old, "ctx.lineJoin", "old");
+ctx.restore();
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.lineJoin.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.lineJoin.worker.js
new file mode 100644
index 0000000000..1da6db86be
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.lineJoin.worker.js
@@ -0,0 +1,37 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.state.saverestore.lineJoin
+// Description:save()/restore() works for lineJoin
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("save()/restore() works for lineJoin");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+// Test that restore() undoes any modifications
+var old = ctx.lineJoin;
+ctx.save();
+ctx.lineJoin = "round";
+ctx.restore();
+_assertSame(ctx.lineJoin, old, "ctx.lineJoin", "old");
+
+// Also test that save() doesn't modify the values
+ctx.lineJoin = "round";
+old = ctx.lineJoin;
+ // we're not interested in failures caused by get(set(x)) != x (e.g.
+ // from rounding), so compare against 'old' instead of against "round"
+ctx.save();
+_assertSame(ctx.lineJoin, old, "ctx.lineJoin", "old");
+ctx.restore();
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.lineWidth.html b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.lineWidth.html
new file mode 100644
index 0000000000..24f9550792
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.lineWidth.html
@@ -0,0 +1,41 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.state.saverestore.lineWidth</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.state.saverestore.lineWidth</h1>
+<p class="desc">save()/restore() works for lineWidth</p>
+
+
+<script>
+var t = async_test("save()/restore() works for lineWidth");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+// Test that restore() undoes any modifications
+var old = ctx.lineWidth;
+ctx.save();
+ctx.lineWidth = 0.5;
+ctx.restore();
+_assertSame(ctx.lineWidth, old, "ctx.lineWidth", "old");
+
+// Also test that save() doesn't modify the values
+ctx.lineWidth = 0.5;
+old = ctx.lineWidth;
+ // we're not interested in failures caused by get(set(x)) != x (e.g.
+ // from rounding), so compare against 'old' instead of against 0.5
+ctx.save();
+_assertSame(ctx.lineWidth, old, "ctx.lineWidth", "old");
+ctx.restore();
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.lineWidth.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.lineWidth.worker.js
new file mode 100644
index 0000000000..657ded5b76
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.lineWidth.worker.js
@@ -0,0 +1,37 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.state.saverestore.lineWidth
+// Description:save()/restore() works for lineWidth
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("save()/restore() works for lineWidth");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+// Test that restore() undoes any modifications
+var old = ctx.lineWidth;
+ctx.save();
+ctx.lineWidth = 0.5;
+ctx.restore();
+_assertSame(ctx.lineWidth, old, "ctx.lineWidth", "old");
+
+// Also test that save() doesn't modify the values
+ctx.lineWidth = 0.5;
+old = ctx.lineWidth;
+ // we're not interested in failures caused by get(set(x)) != x (e.g.
+ // from rounding), so compare against 'old' instead of against 0.5
+ctx.save();
+_assertSame(ctx.lineWidth, old, "ctx.lineWidth", "old");
+ctx.restore();
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.miterLimit.html b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.miterLimit.html
new file mode 100644
index 0000000000..b674467115
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.miterLimit.html
@@ -0,0 +1,41 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.state.saverestore.miterLimit</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.state.saverestore.miterLimit</h1>
+<p class="desc">save()/restore() works for miterLimit</p>
+
+
+<script>
+var t = async_test("save()/restore() works for miterLimit");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+// Test that restore() undoes any modifications
+var old = ctx.miterLimit;
+ctx.save();
+ctx.miterLimit = 0.5;
+ctx.restore();
+_assertSame(ctx.miterLimit, old, "ctx.miterLimit", "old");
+
+// Also test that save() doesn't modify the values
+ctx.miterLimit = 0.5;
+old = ctx.miterLimit;
+ // we're not interested in failures caused by get(set(x)) != x (e.g.
+ // from rounding), so compare against 'old' instead of against 0.5
+ctx.save();
+_assertSame(ctx.miterLimit, old, "ctx.miterLimit", "old");
+ctx.restore();
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.miterLimit.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.miterLimit.worker.js
new file mode 100644
index 0000000000..745f2919a0
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.miterLimit.worker.js
@@ -0,0 +1,37 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.state.saverestore.miterLimit
+// Description:save()/restore() works for miterLimit
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("save()/restore() works for miterLimit");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+// Test that restore() undoes any modifications
+var old = ctx.miterLimit;
+ctx.save();
+ctx.miterLimit = 0.5;
+ctx.restore();
+_assertSame(ctx.miterLimit, old, "ctx.miterLimit", "old");
+
+// Also test that save() doesn't modify the values
+ctx.miterLimit = 0.5;
+old = ctx.miterLimit;
+ // we're not interested in failures caused by get(set(x)) != x (e.g.
+ // from rounding), so compare against 'old' instead of against 0.5
+ctx.save();
+_assertSame(ctx.miterLimit, old, "ctx.miterLimit", "old");
+ctx.restore();
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.path.html b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.path.html
new file mode 100644
index 0000000000..34c0b1e6d7
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.path.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.state.saverestore.path</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.state.saverestore.path</h1>
+<p class="desc">save()/restore() does not affect the current path</p>
+
+
+<script>
+var t = async_test("save()/restore() does not affect the current path");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.save();
+ctx.rect(0, 0, 100, 50);
+ctx.restore();
+ctx.fillStyle = '#0f0';
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.path.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.path.worker.js
new file mode 100644
index 0000000000..24cec15972
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.path.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.state.saverestore.path
+// Description:save()/restore() does not affect the current path
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("save()/restore() does not affect the current path");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.save();
+ctx.rect(0, 0, 100, 50);
+ctx.restore();
+ctx.fillStyle = '#0f0';
+ctx.fill();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.shadowBlur.html b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.shadowBlur.html
new file mode 100644
index 0000000000..af2ee91307
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.shadowBlur.html
@@ -0,0 +1,41 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.state.saverestore.shadowBlur</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.state.saverestore.shadowBlur</h1>
+<p class="desc">save()/restore() works for shadowBlur</p>
+
+
+<script>
+var t = async_test("save()/restore() works for shadowBlur");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+// Test that restore() undoes any modifications
+var old = ctx.shadowBlur;
+ctx.save();
+ctx.shadowBlur = 5;
+ctx.restore();
+_assertSame(ctx.shadowBlur, old, "ctx.shadowBlur", "old");
+
+// Also test that save() doesn't modify the values
+ctx.shadowBlur = 5;
+old = ctx.shadowBlur;
+ // we're not interested in failures caused by get(set(x)) != x (e.g.
+ // from rounding), so compare against 'old' instead of against 5
+ctx.save();
+_assertSame(ctx.shadowBlur, old, "ctx.shadowBlur", "old");
+ctx.restore();
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.shadowBlur.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.shadowBlur.worker.js
new file mode 100644
index 0000000000..12acd3d294
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.shadowBlur.worker.js
@@ -0,0 +1,37 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.state.saverestore.shadowBlur
+// Description:save()/restore() works for shadowBlur
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("save()/restore() works for shadowBlur");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+// Test that restore() undoes any modifications
+var old = ctx.shadowBlur;
+ctx.save();
+ctx.shadowBlur = 5;
+ctx.restore();
+_assertSame(ctx.shadowBlur, old, "ctx.shadowBlur", "old");
+
+// Also test that save() doesn't modify the values
+ctx.shadowBlur = 5;
+old = ctx.shadowBlur;
+ // we're not interested in failures caused by get(set(x)) != x (e.g.
+ // from rounding), so compare against 'old' instead of against 5
+ctx.save();
+_assertSame(ctx.shadowBlur, old, "ctx.shadowBlur", "old");
+ctx.restore();
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.shadowColor.html b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.shadowColor.html
new file mode 100644
index 0000000000..5aa0194100
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.shadowColor.html
@@ -0,0 +1,41 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.state.saverestore.shadowColor</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.state.saverestore.shadowColor</h1>
+<p class="desc">save()/restore() works for shadowColor</p>
+
+
+<script>
+var t = async_test("save()/restore() works for shadowColor");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+// Test that restore() undoes any modifications
+var old = ctx.shadowColor;
+ctx.save();
+ctx.shadowColor = "#ff0000";
+ctx.restore();
+_assertSame(ctx.shadowColor, old, "ctx.shadowColor", "old");
+
+// Also test that save() doesn't modify the values
+ctx.shadowColor = "#ff0000";
+old = ctx.shadowColor;
+ // we're not interested in failures caused by get(set(x)) != x (e.g.
+ // from rounding), so compare against 'old' instead of against "#ff0000"
+ctx.save();
+_assertSame(ctx.shadowColor, old, "ctx.shadowColor", "old");
+ctx.restore();
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.shadowColor.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.shadowColor.worker.js
new file mode 100644
index 0000000000..b2f9fb9265
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.shadowColor.worker.js
@@ -0,0 +1,37 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.state.saverestore.shadowColor
+// Description:save()/restore() works for shadowColor
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("save()/restore() works for shadowColor");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+// Test that restore() undoes any modifications
+var old = ctx.shadowColor;
+ctx.save();
+ctx.shadowColor = "#ff0000";
+ctx.restore();
+_assertSame(ctx.shadowColor, old, "ctx.shadowColor", "old");
+
+// Also test that save() doesn't modify the values
+ctx.shadowColor = "#ff0000";
+old = ctx.shadowColor;
+ // we're not interested in failures caused by get(set(x)) != x (e.g.
+ // from rounding), so compare against 'old' instead of against "#ff0000"
+ctx.save();
+_assertSame(ctx.shadowColor, old, "ctx.shadowColor", "old");
+ctx.restore();
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.shadowOffsetX.html b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.shadowOffsetX.html
new file mode 100644
index 0000000000..f281234801
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.shadowOffsetX.html
@@ -0,0 +1,41 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.state.saverestore.shadowOffsetX</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.state.saverestore.shadowOffsetX</h1>
+<p class="desc">save()/restore() works for shadowOffsetX</p>
+
+
+<script>
+var t = async_test("save()/restore() works for shadowOffsetX");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+// Test that restore() undoes any modifications
+var old = ctx.shadowOffsetX;
+ctx.save();
+ctx.shadowOffsetX = 5;
+ctx.restore();
+_assertSame(ctx.shadowOffsetX, old, "ctx.shadowOffsetX", "old");
+
+// Also test that save() doesn't modify the values
+ctx.shadowOffsetX = 5;
+old = ctx.shadowOffsetX;
+ // we're not interested in failures caused by get(set(x)) != x (e.g.
+ // from rounding), so compare against 'old' instead of against 5
+ctx.save();
+_assertSame(ctx.shadowOffsetX, old, "ctx.shadowOffsetX", "old");
+ctx.restore();
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.shadowOffsetX.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.shadowOffsetX.worker.js
new file mode 100644
index 0000000000..2711817755
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.shadowOffsetX.worker.js
@@ -0,0 +1,37 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.state.saverestore.shadowOffsetX
+// Description:save()/restore() works for shadowOffsetX
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("save()/restore() works for shadowOffsetX");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+// Test that restore() undoes any modifications
+var old = ctx.shadowOffsetX;
+ctx.save();
+ctx.shadowOffsetX = 5;
+ctx.restore();
+_assertSame(ctx.shadowOffsetX, old, "ctx.shadowOffsetX", "old");
+
+// Also test that save() doesn't modify the values
+ctx.shadowOffsetX = 5;
+old = ctx.shadowOffsetX;
+ // we're not interested in failures caused by get(set(x)) != x (e.g.
+ // from rounding), so compare against 'old' instead of against 5
+ctx.save();
+_assertSame(ctx.shadowOffsetX, old, "ctx.shadowOffsetX", "old");
+ctx.restore();
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.shadowOffsetY.html b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.shadowOffsetY.html
new file mode 100644
index 0000000000..643ce99a24
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.shadowOffsetY.html
@@ -0,0 +1,41 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.state.saverestore.shadowOffsetY</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.state.saverestore.shadowOffsetY</h1>
+<p class="desc">save()/restore() works for shadowOffsetY</p>
+
+
+<script>
+var t = async_test("save()/restore() works for shadowOffsetY");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+// Test that restore() undoes any modifications
+var old = ctx.shadowOffsetY;
+ctx.save();
+ctx.shadowOffsetY = 5;
+ctx.restore();
+_assertSame(ctx.shadowOffsetY, old, "ctx.shadowOffsetY", "old");
+
+// Also test that save() doesn't modify the values
+ctx.shadowOffsetY = 5;
+old = ctx.shadowOffsetY;
+ // we're not interested in failures caused by get(set(x)) != x (e.g.
+ // from rounding), so compare against 'old' instead of against 5
+ctx.save();
+_assertSame(ctx.shadowOffsetY, old, "ctx.shadowOffsetY", "old");
+ctx.restore();
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.shadowOffsetY.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.shadowOffsetY.worker.js
new file mode 100644
index 0000000000..aaa572a4d1
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.shadowOffsetY.worker.js
@@ -0,0 +1,37 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.state.saverestore.shadowOffsetY
+// Description:save()/restore() works for shadowOffsetY
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("save()/restore() works for shadowOffsetY");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+// Test that restore() undoes any modifications
+var old = ctx.shadowOffsetY;
+ctx.save();
+ctx.shadowOffsetY = 5;
+ctx.restore();
+_assertSame(ctx.shadowOffsetY, old, "ctx.shadowOffsetY", "old");
+
+// Also test that save() doesn't modify the values
+ctx.shadowOffsetY = 5;
+old = ctx.shadowOffsetY;
+ // we're not interested in failures caused by get(set(x)) != x (e.g.
+ // from rounding), so compare against 'old' instead of against 5
+ctx.save();
+_assertSame(ctx.shadowOffsetY, old, "ctx.shadowOffsetY", "old");
+ctx.restore();
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.stack.html b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.stack.html
new file mode 100644
index 0000000000..979176804b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.stack.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.state.saverestore.stack</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.state.saverestore.stack</h1>
+<p class="desc">save()/restore() can be nested as a stack</p>
+
+
+<script>
+var t = async_test("save()/restore() can be nested as a stack");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.lineWidth = 1;
+ctx.save();
+ctx.lineWidth = 2;
+ctx.save();
+ctx.lineWidth = 3;
+_assertSame(ctx.lineWidth, 3, "ctx.lineWidth", "3");
+ctx.restore();
+_assertSame(ctx.lineWidth, 2, "ctx.lineWidth", "2");
+ctx.restore();
+_assertSame(ctx.lineWidth, 1, "ctx.lineWidth", "1");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.stack.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.stack.worker.js
new file mode 100644
index 0000000000..e1f078e90d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.stack.worker.js
@@ -0,0 +1,32 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.state.saverestore.stack
+// Description:save()/restore() can be nested as a stack
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("save()/restore() can be nested as a stack");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.lineWidth = 1;
+ctx.save();
+ctx.lineWidth = 2;
+ctx.save();
+ctx.lineWidth = 3;
+_assertSame(ctx.lineWidth, 3, "ctx.lineWidth", "3");
+ctx.restore();
+_assertSame(ctx.lineWidth, 2, "ctx.lineWidth", "2");
+ctx.restore();
+_assertSame(ctx.lineWidth, 1, "ctx.lineWidth", "1");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.stackdepth.html b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.stackdepth.html
new file mode 100644
index 0000000000..53dbc63c2b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.stackdepth.html
@@ -0,0 +1,37 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.state.saverestore.stackdepth</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.state.saverestore.stackdepth</h1>
+<p class="desc">save()/restore() stack depth is not unreasonably limited</p>
+
+
+<script>
+var t = async_test("save()/restore() stack depth is not unreasonably limited");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var limit = 512;
+for (var i = 1; i < limit; ++i)
+{
+ ctx.save();
+ ctx.lineWidth = i;
+}
+for (var i = limit-1; i > 0; --i)
+{
+ _assertSame(ctx.lineWidth, i, "ctx.lineWidth", "i");
+ ctx.restore();
+}
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.stackdepth.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.stackdepth.worker.js
new file mode 100644
index 0000000000..a485c19471
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.stackdepth.worker.js
@@ -0,0 +1,33 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.state.saverestore.stackdepth
+// Description:save()/restore() stack depth is not unreasonably limited
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("save()/restore() stack depth is not unreasonably limited");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var limit = 512;
+for (var i = 1; i < limit; ++i)
+{
+ ctx.save();
+ ctx.lineWidth = i;
+}
+for (var i = limit-1; i > 0; --i)
+{
+ _assertSame(ctx.lineWidth, i, "ctx.lineWidth", "i");
+ ctx.restore();
+}
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.strokeStyle.html b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.strokeStyle.html
new file mode 100644
index 0000000000..60963729f4
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.strokeStyle.html
@@ -0,0 +1,41 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.state.saverestore.strokeStyle</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.state.saverestore.strokeStyle</h1>
+<p class="desc">save()/restore() works for strokeStyle</p>
+
+
+<script>
+var t = async_test("save()/restore() works for strokeStyle");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+// Test that restore() undoes any modifications
+var old = ctx.strokeStyle;
+ctx.save();
+ctx.strokeStyle = "#ff0000";
+ctx.restore();
+_assertSame(ctx.strokeStyle, old, "ctx.strokeStyle", "old");
+
+// Also test that save() doesn't modify the values
+ctx.strokeStyle = "#ff0000";
+old = ctx.strokeStyle;
+ // we're not interested in failures caused by get(set(x)) != x (e.g.
+ // from rounding), so compare against 'old' instead of against "#ff0000"
+ctx.save();
+_assertSame(ctx.strokeStyle, old, "ctx.strokeStyle", "old");
+ctx.restore();
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.strokeStyle.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.strokeStyle.worker.js
new file mode 100644
index 0000000000..275ba9e072
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.strokeStyle.worker.js
@@ -0,0 +1,37 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.state.saverestore.strokeStyle
+// Description:save()/restore() works for strokeStyle
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("save()/restore() works for strokeStyle");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+// Test that restore() undoes any modifications
+var old = ctx.strokeStyle;
+ctx.save();
+ctx.strokeStyle = "#ff0000";
+ctx.restore();
+_assertSame(ctx.strokeStyle, old, "ctx.strokeStyle", "old");
+
+// Also test that save() doesn't modify the values
+ctx.strokeStyle = "#ff0000";
+old = ctx.strokeStyle;
+ // we're not interested in failures caused by get(set(x)) != x (e.g.
+ // from rounding), so compare against 'old' instead of against "#ff0000"
+ctx.save();
+_assertSame(ctx.strokeStyle, old, "ctx.strokeStyle", "old");
+ctx.restore();
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.transformation.html b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.transformation.html
new file mode 100644
index 0000000000..fff2ead703
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.transformation.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.state.saverestore.transformation</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.state.saverestore.transformation</h1>
+<p class="desc">save()/restore() affects the current transformation matrix</p>
+
+
+<script>
+var t = async_test("save()/restore() affects the current transformation matrix");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.save();
+ctx.translate(200, 0);
+ctx.restore();
+ctx.fillStyle = '#f00';
+ctx.fillRect(-200, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.transformation.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.transformation.worker.js
new file mode 100644
index 0000000000..64fb4c4734
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.transformation.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.state.saverestore.transformation
+// Description:save()/restore() affects the current transformation matrix
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("save()/restore() affects the current transformation matrix");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.save();
+ctx.translate(200, 0);
+ctx.restore();
+ctx.fillStyle = '#f00';
+ctx.fillRect(-200, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.underflow.html b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.underflow.html
new file mode 100644
index 0000000000..986d966885
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.underflow.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.state.saverestore.underflow</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.state.saverestore.underflow</h1>
+<p class="desc">restore() with an empty stack has no effect</p>
+
+
+<script>
+var t = async_test("restore() with an empty stack has no effect");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+for (var i = 0; i < 16; ++i)
+ ctx.restore();
+ctx.lineWidth = 0.5;
+ctx.restore();
+_assertSame(ctx.lineWidth, 0.5, "ctx.lineWidth", "0.5");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.underflow.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.underflow.worker.js
new file mode 100644
index 0000000000..d38cf97417
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.underflow.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.state.saverestore.underflow
+// Description:restore() with an empty stack has no effect
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("restore() with an empty stack has no effect");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+for (var i = 0; i < 16; ++i)
+ ctx.restore();
+ctx.lineWidth = 0.5;
+ctx.restore();
+_assertSame(ctx.lineWidth, 0.5, "ctx.lineWidth", "0.5");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/2d-getcontext-options.any.js b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/2d-getcontext-options.any.js
new file mode 100644
index 0000000000..8c4e7cfe96
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/2d-getcontext-options.any.js
@@ -0,0 +1,41 @@
+test(() => {
+ const expected = [
+ "alpha",
+ "colorSpace",
+ "colorSpace toString",
+ "desynchronized",
+ "willReadFrequently",
+ ];
+ var actual = [];
+ const options = {
+ get alpha() {
+ actual.push("alpha");
+ return true;
+ },
+ get willReadFrequently() {
+ actual.push("willReadFrequently");
+ return false;
+ },
+ get desynchronized() {
+ actual.push("desynchronized");
+ return false;
+ },
+ get colorSpace() {
+ actual.push("colorSpace");
+ return {
+ toString() {
+ actual.push("colorSpace toString");
+ return "srgb";
+ }
+ };
+ },
+ };
+
+ const canvas = new OffscreenCanvas(100, 50);
+ const context = canvas.getContext('2d', options);
+ assert_not_equals(context, null, "context");
+ assert_array_equals(actual, expected, "order of operations (creation)");
+ actual = [];
+ assert_equals(canvas.getContext('2d', options), context, "cached context");
+ assert_array_equals(actual, expected, "order of operations (caching)");
+});
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/2d.canvas.readonly.html b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/2d.canvas.readonly.html
new file mode 100644
index 0000000000..ec6ffe5292
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/2d.canvas.readonly.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.canvas.readonly</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.canvas.readonly</h1>
+<p class="desc">canvas is readonly</p>
+
+
+<script>
+var t = async_test("canvas is readonly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+var d = ctx.canvas;
+_assertDifferent(offscreenCanvas2, d, "offscreenCanvas2", "d");
+ctx.canvas = offscreenCanvas2;
+_assertSame(ctx.canvas, d, "ctx.canvas", "d");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/2d.canvas.readonly.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/2d.canvas.readonly.worker.js
new file mode 100644
index 0000000000..8f88efd6dc
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/2d.canvas.readonly.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.canvas.readonly
+// Description:canvas is readonly
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("canvas is readonly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+var d = ctx.canvas;
+_assertDifferent(offscreenCanvas2, d, "offscreenCanvas2", "d");
+ctx.canvas = offscreenCanvas2;
+_assertSame(ctx.canvas, d, "ctx.canvas", "d");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/2d.canvas.reference.html b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/2d.canvas.reference.html
new file mode 100644
index 0000000000..024b1fe7d5
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/2d.canvas.reference.html
@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.canvas.reference</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.canvas.reference</h1>
+<p class="desc">canvas refers back to its canvas</p>
+
+
+<script>
+var t = async_test("canvas refers back to its canvas");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertSame(ctx.canvas, canvas, "ctx.canvas", "canvas");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/2d.canvas.reference.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/2d.canvas.reference.worker.js
new file mode 100644
index 0000000000..a80e559053
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/2d.canvas.reference.worker.js
@@ -0,0 +1,23 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.canvas.reference
+// Description:canvas refers back to its canvas
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("canvas refers back to its canvas");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertSame(ctx.canvas, canvas, "ctx.canvas", "canvas");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/2d.getcontext.exists.html b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/2d.getcontext.exists.html
new file mode 100644
index 0000000000..55bdf1cc19
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/2d.getcontext.exists.html
@@ -0,0 +1,28 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.getcontext.exists</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.getcontext.exists</h1>
+<p class="desc">The 2D context is implemented</p>
+
+
+<script>
+var t = async_test("The 2D context is implemented");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+_assertDifferent(offscreenCanvas2.getContext('2d'), null, "offscreenCanvas2.getContext('2d')", "null");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/2d.getcontext.exists.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/2d.getcontext.exists.worker.js
new file mode 100644
index 0000000000..97f8cc745b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/2d.getcontext.exists.worker.js
@@ -0,0 +1,24 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.getcontext.exists
+// Description:The 2D context is implemented
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("The 2D context is implemented");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+_assertDifferent(offscreenCanvas2.getContext('2d'), null, "offscreenCanvas2.getContext('2d')", "null");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/2d.getcontext.extraargs.cache.html b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/2d.getcontext.extraargs.cache.html
new file mode 100644
index 0000000000..a57dbcb655
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/2d.getcontext.extraargs.cache.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.getcontext.extraargs.cache</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.getcontext.extraargs.cache</h1>
+<p class="desc">The 2D context doesn't throw with extra getContext arguments (cached)</p>
+
+
+<script>
+var t = async_test("The 2D context doesn't throw with extra getContext arguments (cached)");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertDifferent(canvas.getContext('2d', false, {}, [], 1, "2"), null, "canvas.getContext('2d', false, {}, [], 1, \"2\")", "null");
+_assertDifferent(canvas.getContext('2d', 123), null, "canvas.getContext('2d', 123)", "null");
+_assertDifferent(canvas.getContext('2d', "test"), null, "canvas.getContext('2d', \"test\")", "null");
+_assertDifferent(canvas.getContext('2d', undefined), null, "canvas.getContext('2d', undefined)", "null");
+_assertDifferent(canvas.getContext('2d', null), null, "canvas.getContext('2d', null)", "null");
+_assertDifferent(canvas.getContext('2d', Symbol.hasInstance), null, "canvas.getContext('2d', Symbol.hasInstance)", "null");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/2d.getcontext.extraargs.cache.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/2d.getcontext.extraargs.cache.worker.js
new file mode 100644
index 0000000000..df330e301b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/2d.getcontext.extraargs.cache.worker.js
@@ -0,0 +1,28 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.getcontext.extraargs.cache
+// Description:The 2D context doesn't throw with extra getContext arguments (cached)
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("The 2D context doesn't throw with extra getContext arguments (cached)");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertDifferent(canvas.getContext('2d', false, {}, [], 1, "2"), null, "canvas.getContext('2d', false, {}, [], 1, \"2\")", "null");
+_assertDifferent(canvas.getContext('2d', 123), null, "canvas.getContext('2d', 123)", "null");
+_assertDifferent(canvas.getContext('2d', "test"), null, "canvas.getContext('2d', \"test\")", "null");
+_assertDifferent(canvas.getContext('2d', undefined), null, "canvas.getContext('2d', undefined)", "null");
+_assertDifferent(canvas.getContext('2d', null), null, "canvas.getContext('2d', null)", "null");
+_assertDifferent(canvas.getContext('2d', Symbol.hasInstance), null, "canvas.getContext('2d', Symbol.hasInstance)", "null");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/2d.getcontext.extraargs.create.html b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/2d.getcontext.extraargs.create.html
new file mode 100644
index 0000000000..a626318791
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/2d.getcontext.extraargs.create.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.getcontext.extraargs.create</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.getcontext.extraargs.create</h1>
+<p class="desc">The 2D context doesn't throw with extra getContext arguments (new context)</p>
+
+
+<script>
+var t = async_test("The 2D context doesn't throw with extra getContext arguments (new context)");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertDifferent((new OffscreenCanvas(100, 50)).getContext('2d', false, {}, [], 1, "2"), null, "(new OffscreenCanvas(100, 50)).getContext('2d', false, {}, [], 1, \"2\")", "null");
+_assertDifferent((new OffscreenCanvas(100, 50)).getContext('2d', 123), null, "(new OffscreenCanvas(100, 50)).getContext('2d', 123)", "null");
+_assertDifferent((new OffscreenCanvas(100, 50)).getContext('2d', "test"), null, "(new OffscreenCanvas(100, 50)).getContext('2d', \"test\")", "null");
+_assertDifferent((new OffscreenCanvas(100, 50)).getContext('2d', undefined), null, "(new OffscreenCanvas(100, 50)).getContext('2d', undefined)", "null");
+_assertDifferent((new OffscreenCanvas(100, 50)).getContext('2d', null), null, "(new OffscreenCanvas(100, 50)).getContext('2d', null)", "null");
+_assertDifferent((new OffscreenCanvas(100, 50)).getContext('2d', Symbol.hasInstance), null, "(new OffscreenCanvas(100, 50)).getContext('2d', Symbol.hasInstance)", "null");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/2d.getcontext.extraargs.create.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/2d.getcontext.extraargs.create.worker.js
new file mode 100644
index 0000000000..f34c5a1d0e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/2d.getcontext.extraargs.create.worker.js
@@ -0,0 +1,28 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.getcontext.extraargs.create
+// Description:The 2D context doesn't throw with extra getContext arguments (new context)
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("The 2D context doesn't throw with extra getContext arguments (new context)");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertDifferent((new OffscreenCanvas(100, 50)).getContext('2d', false, {}, [], 1, "2"), null, "(new OffscreenCanvas(100, 50)).getContext('2d', false, {}, [], 1, \"2\")", "null");
+_assertDifferent((new OffscreenCanvas(100, 50)).getContext('2d', 123), null, "(new OffscreenCanvas(100, 50)).getContext('2d', 123)", "null");
+_assertDifferent((new OffscreenCanvas(100, 50)).getContext('2d', "test"), null, "(new OffscreenCanvas(100, 50)).getContext('2d', \"test\")", "null");
+_assertDifferent((new OffscreenCanvas(100, 50)).getContext('2d', undefined), null, "(new OffscreenCanvas(100, 50)).getContext('2d', undefined)", "null");
+_assertDifferent((new OffscreenCanvas(100, 50)).getContext('2d', null), null, "(new OffscreenCanvas(100, 50)).getContext('2d', null)", "null");
+_assertDifferent((new OffscreenCanvas(100, 50)).getContext('2d', Symbol.hasInstance), null, "(new OffscreenCanvas(100, 50)).getContext('2d', Symbol.hasInstance)", "null");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/2d.getcontext.shared.html b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/2d.getcontext.shared.html
new file mode 100644
index 0000000000..6d6162528a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/2d.getcontext.shared.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.getcontext.shared</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.getcontext.shared</h1>
+<p class="desc">getContext('2d') returns objects which share canvas state</p>
+
+
+<script>
+var t = async_test("getContext('2d') returns objects which share canvas state");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var ctx2 = canvas.getContext('2d');
+ctx.fillStyle = '#f00';
+ctx2.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/2d.getcontext.shared.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/2d.getcontext.shared.worker.js
new file mode 100644
index 0000000000..4b8dd52e61
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/2d.getcontext.shared.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.getcontext.shared
+// Description:getContext('2d') returns objects which share canvas state
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("getContext('2d') returns objects which share canvas state");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var ctx2 = canvas.getContext('2d');
+ctx.fillStyle = '#f00';
+ctx2.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/2d.getcontext.unique.html b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/2d.getcontext.unique.html
new file mode 100644
index 0000000000..c7e71da63a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/2d.getcontext.unique.html
@@ -0,0 +1,28 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.getcontext.unique</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.getcontext.unique</h1>
+<p class="desc">getContext('2d') returns the same object</p>
+
+
+<script>
+var t = async_test("getContext('2d') returns the same object");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+_assertSame(offscreenCanvas2.getContext('2d'), offscreenCanvas2.getContext('2d'), "offscreenCanvas2.getContext('2d')", "offscreenCanvas2.getContext('2d')");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/2d.getcontext.unique.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/2d.getcontext.unique.worker.js
new file mode 100644
index 0000000000..a2a744df61
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/2d.getcontext.unique.worker.js
@@ -0,0 +1,24 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.getcontext.unique
+// Description:getContext('2d') returns the same object
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("getContext('2d') returns the same object");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+_assertSame(offscreenCanvas2.getContext('2d'), offscreenCanvas2.getContext('2d'), "offscreenCanvas2.getContext('2d')", "offscreenCanvas2.getContext('2d')");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/context.arguments.missing.html b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/context.arguments.missing.html
new file mode 100644
index 0000000000..b69f63cdfb
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/context.arguments.missing.html
@@ -0,0 +1,28 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: context.arguments.missing</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>context.arguments.missing</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+assert_throws_js(TypeError, function() { offscreenCanvas2.getContext(); });
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/context.arguments.missing.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/context.arguments.missing.worker.js
new file mode 100644
index 0000000000..f03ca52328
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/context.arguments.missing.worker.js
@@ -0,0 +1,24 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:context.arguments.missing
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+assert_throws_js(TypeError, function() { offscreenCanvas2.getContext(); });
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/context.casesensitive.html b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/context.casesensitive.html
new file mode 100644
index 0000000000..e7ee0c63ba
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/context.casesensitive.html
@@ -0,0 +1,28 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: context.casesensitive</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>context.casesensitive</h1>
+<p class="desc">Context name "2D" is unrecognised; matching is case sensitive</p>
+
+
+<script>
+var t = async_test("Context name \"2D\" is unrecognised; matching is case sensitive");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+assert_throws_js(TypeError, function() { offscreenCanvas2.getContext('2D'); });
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/context.casesensitive.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/context.casesensitive.worker.js
new file mode 100644
index 0000000000..265fe959d2
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/context.casesensitive.worker.js
@@ -0,0 +1,24 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:context.casesensitive
+// Description:Context name "2D" is unrecognised; matching is case sensitive
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Context name \"2D\" is unrecognised; matching is case sensitive");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+assert_throws_js(TypeError, function() { offscreenCanvas2.getContext('2D'); });
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/context.emptystring.html b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/context.emptystring.html
new file mode 100644
index 0000000000..c8f8943d9e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/context.emptystring.html
@@ -0,0 +1,28 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: context.emptystring</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>context.emptystring</h1>
+<p class="desc">getContext with empty string returns null</p>
+
+
+<script>
+var t = async_test("getContext with empty string returns null");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+assert_throws_js(TypeError, function() { offscreenCanvas2.getContext(""); });
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/context.emptystring.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/context.emptystring.worker.js
new file mode 100644
index 0000000000..45612d386c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/context.emptystring.worker.js
@@ -0,0 +1,24 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:context.emptystring
+// Description:getContext with empty string returns null
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("getContext with empty string returns null");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+assert_throws_js(TypeError, function() { offscreenCanvas2.getContext(""); });
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/context.unrecognised.badname.html b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/context.unrecognised.badname.html
new file mode 100644
index 0000000000..d1b0f2fd17
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/context.unrecognised.badname.html
@@ -0,0 +1,28 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: context.unrecognised.badname</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>context.unrecognised.badname</h1>
+<p class="desc">getContext with unrecognised context name returns null</p>
+
+
+<script>
+var t = async_test("getContext with unrecognised context name returns null");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+assert_throws_js(TypeError, function() { offscreenCanvas2.getContext('This is not an implemented context in any real browser'); });
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/context.unrecognised.badname.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/context.unrecognised.badname.worker.js
new file mode 100644
index 0000000000..cc50c2bdbd
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/context.unrecognised.badname.worker.js
@@ -0,0 +1,24 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:context.unrecognised.badname
+// Description:getContext with unrecognised context name returns null
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("getContext with unrecognised context name returns null");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+assert_throws_js(TypeError, function() { offscreenCanvas2.getContext('This is not an implemented context in any real browser'); });
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/context.unrecognised.badsuffix.html b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/context.unrecognised.badsuffix.html
new file mode 100644
index 0000000000..30178af927
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/context.unrecognised.badsuffix.html
@@ -0,0 +1,28 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: context.unrecognised.badsuffix</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>context.unrecognised.badsuffix</h1>
+<p class="desc">Context name "2d" plus a suffix is unrecognised</p>
+
+
+<script>
+var t = async_test("Context name \"2d\" plus a suffix is unrecognised");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+assert_throws_js(TypeError, function() { offscreenCanvas2.getContext("2d#"); });
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/context.unrecognised.badsuffix.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/context.unrecognised.badsuffix.worker.js
new file mode 100644
index 0000000000..7b3d8a09c8
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/context.unrecognised.badsuffix.worker.js
@@ -0,0 +1,24 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:context.unrecognised.badsuffix
+// Description:Context name "2d" plus a suffix is unrecognised
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Context name \"2d\" plus a suffix is unrecognised");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+assert_throws_js(TypeError, function() { offscreenCanvas2.getContext("2d#"); });
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/context.unrecognised.nullsuffix.html b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/context.unrecognised.nullsuffix.html
new file mode 100644
index 0000000000..2a22549baa
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/context.unrecognised.nullsuffix.html
@@ -0,0 +1,28 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: context.unrecognised.nullsuffix</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>context.unrecognised.nullsuffix</h1>
+<p class="desc">Context name "2d" plus a "\0" suffix is unrecognised</p>
+
+
+<script>
+var t = async_test("Context name \"2d\" plus a \"\\0\" suffix is unrecognised");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+assert_throws_js(TypeError, function() { offscreenCanvas2.getContext("2d\0"); });
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/context.unrecognised.nullsuffix.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/context.unrecognised.nullsuffix.worker.js
new file mode 100644
index 0000000000..b6594100f6
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/context.unrecognised.nullsuffix.worker.js
@@ -0,0 +1,24 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:context.unrecognised.nullsuffix
+// Description:Context name "2d" plus a "\0" suffix is unrecognised
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Context name \"2d\" plus a \"\\0\" suffix is unrecognised");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+assert_throws_js(TypeError, function() { offscreenCanvas2.getContext("2d\0"); });
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/context.unrecognised.unicode.html b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/context.unrecognised.unicode.html
new file mode 100644
index 0000000000..0c826595fe
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/context.unrecognised.unicode.html
@@ -0,0 +1,28 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: context.unrecognised.unicode</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>context.unrecognised.unicode</h1>
+<p class="desc">Context name which kind of looks like "2d" is unrecognised</p>
+
+
+<script>
+var t = async_test("Context name which kind of looks like \"2d\" is unrecognised");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+assert_throws_js(TypeError, function() { offscreenCanvas2.getContext("2\uFF44"); });
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/context.unrecognised.unicode.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/context.unrecognised.unicode.worker.js
new file mode 100644
index 0000000000..cade5a20b5
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/context.unrecognised.unicode.worker.js
@@ -0,0 +1,24 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:context.unrecognised.unicode
+// Description:Context name which kind of looks like "2d" is unrecognised
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Context name which kind of looks like \"2d\" is unrecognised");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+assert_throws_js(TypeError, function() { offscreenCanvas2.getContext("2\uFF44"); });
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/initial.color.html b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/initial.color.html
new file mode 100644
index 0000000000..bfdcef7c4f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/initial.color.html
@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: initial.color</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>initial.color</h1>
+<p class="desc">Initial state is transparent black</p>
+
+
+<script>
+var t = async_test("Initial state is transparent black");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertPixel(canvas, 20,20, 0,0,0,0);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/initial.color.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/initial.color.worker.js
new file mode 100644
index 0000000000..2a6e6e576c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/initial.color.worker.js
@@ -0,0 +1,23 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:initial.color
+// Description:Initial state is transparent black
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Initial state is transparent black");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertPixel(canvas, 20,20, 0,0,0,0);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/initial.reset.2dstate.html b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/initial.reset.2dstate.html
new file mode 100644
index 0000000000..76b76070d4
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/initial.reset.2dstate.html
@@ -0,0 +1,88 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: initial.reset.2dstate</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>initial.reset.2dstate</h1>
+<p class="desc">Resetting the canvas state resets 2D state variables</p>
+
+
+<script>
+var t = async_test("Resetting the canvas state resets 2D state variables");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+canvas.width = 100;
+var default_val;
+
+default_val = ctx.strokeStyle;
+ctx.strokeStyle = "#ff0000";
+canvas.width = 100;
+_assertSame(ctx.strokeStyle, default_val, "ctx.strokeStyle", "default_val");
+
+default_val = ctx.fillStyle;
+ctx.fillStyle = "#ff0000";
+canvas.width = 100;
+_assertSame(ctx.fillStyle, default_val, "ctx.fillStyle", "default_val");
+
+default_val = ctx.globalAlpha;
+ctx.globalAlpha = 0.5;
+canvas.width = 100;
+_assertSame(ctx.globalAlpha, default_val, "ctx.globalAlpha", "default_val");
+
+default_val = ctx.lineWidth;
+ctx.lineWidth = 0.5;
+canvas.width = 100;
+_assertSame(ctx.lineWidth, default_val, "ctx.lineWidth", "default_val");
+
+default_val = ctx.lineCap;
+ctx.lineCap = "round";
+canvas.width = 100;
+_assertSame(ctx.lineCap, default_val, "ctx.lineCap", "default_val");
+
+default_val = ctx.lineJoin;
+ctx.lineJoin = "round";
+canvas.width = 100;
+_assertSame(ctx.lineJoin, default_val, "ctx.lineJoin", "default_val");
+
+default_val = ctx.miterLimit;
+ctx.miterLimit = 0.5;
+canvas.width = 100;
+_assertSame(ctx.miterLimit, default_val, "ctx.miterLimit", "default_val");
+
+default_val = ctx.shadowOffsetX;
+ctx.shadowOffsetX = 5;
+canvas.width = 100;
+_assertSame(ctx.shadowOffsetX, default_val, "ctx.shadowOffsetX", "default_val");
+
+default_val = ctx.shadowOffsetY;
+ctx.shadowOffsetY = 5;
+canvas.width = 100;
+_assertSame(ctx.shadowOffsetY, default_val, "ctx.shadowOffsetY", "default_val");
+
+default_val = ctx.shadowBlur;
+ctx.shadowBlur = 5;
+canvas.width = 100;
+_assertSame(ctx.shadowBlur, default_val, "ctx.shadowBlur", "default_val");
+
+default_val = ctx.shadowColor;
+ctx.shadowColor = "#ff0000";
+canvas.width = 100;
+_assertSame(ctx.shadowColor, default_val, "ctx.shadowColor", "default_val");
+
+default_val = ctx.globalCompositeOperation;
+ctx.globalCompositeOperation = "copy";
+canvas.width = 100;
+_assertSame(ctx.globalCompositeOperation, default_val, "ctx.globalCompositeOperation", "default_val");
+
+t.done();
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/initial.reset.2dstate.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/initial.reset.2dstate.worker.js
new file mode 100644
index 0000000000..273c5f0bd6
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/initial.reset.2dstate.worker.js
@@ -0,0 +1,84 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:initial.reset.2dstate
+// Description:Resetting the canvas state resets 2D state variables
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Resetting the canvas state resets 2D state variables");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+canvas.width = 100;
+var default_val;
+
+default_val = ctx.strokeStyle;
+ctx.strokeStyle = "#ff0000";
+canvas.width = 100;
+_assertSame(ctx.strokeStyle, default_val, "ctx.strokeStyle", "default_val");
+
+default_val = ctx.fillStyle;
+ctx.fillStyle = "#ff0000";
+canvas.width = 100;
+_assertSame(ctx.fillStyle, default_val, "ctx.fillStyle", "default_val");
+
+default_val = ctx.globalAlpha;
+ctx.globalAlpha = 0.5;
+canvas.width = 100;
+_assertSame(ctx.globalAlpha, default_val, "ctx.globalAlpha", "default_val");
+
+default_val = ctx.lineWidth;
+ctx.lineWidth = 0.5;
+canvas.width = 100;
+_assertSame(ctx.lineWidth, default_val, "ctx.lineWidth", "default_val");
+
+default_val = ctx.lineCap;
+ctx.lineCap = "round";
+canvas.width = 100;
+_assertSame(ctx.lineCap, default_val, "ctx.lineCap", "default_val");
+
+default_val = ctx.lineJoin;
+ctx.lineJoin = "round";
+canvas.width = 100;
+_assertSame(ctx.lineJoin, default_val, "ctx.lineJoin", "default_val");
+
+default_val = ctx.miterLimit;
+ctx.miterLimit = 0.5;
+canvas.width = 100;
+_assertSame(ctx.miterLimit, default_val, "ctx.miterLimit", "default_val");
+
+default_val = ctx.shadowOffsetX;
+ctx.shadowOffsetX = 5;
+canvas.width = 100;
+_assertSame(ctx.shadowOffsetX, default_val, "ctx.shadowOffsetX", "default_val");
+
+default_val = ctx.shadowOffsetY;
+ctx.shadowOffsetY = 5;
+canvas.width = 100;
+_assertSame(ctx.shadowOffsetY, default_val, "ctx.shadowOffsetY", "default_val");
+
+default_val = ctx.shadowBlur;
+ctx.shadowBlur = 5;
+canvas.width = 100;
+_assertSame(ctx.shadowBlur, default_val, "ctx.shadowBlur", "default_val");
+
+default_val = ctx.shadowColor;
+ctx.shadowColor = "#ff0000";
+canvas.width = 100;
+_assertSame(ctx.shadowColor, default_val, "ctx.shadowColor", "default_val");
+
+default_val = ctx.globalCompositeOperation;
+ctx.globalCompositeOperation = "copy";
+canvas.width = 100;
+_assertSame(ctx.globalCompositeOperation, default_val, "ctx.globalCompositeOperation", "default_val");
+
+t.done();
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/initial.reset.clip.html b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/initial.reset.clip.html
new file mode 100644
index 0000000000..87a3e43be4
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/initial.reset.clip.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: initial.reset.clip</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>initial.reset.clip</h1>
+<p class="desc">Resetting the canvas state resets the current clip region</p>
+
+
+<script>
+var t = async_test("Resetting the canvas state resets the current clip region");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+canvas.width = 100;
+ctx.rect(0, 0, 1, 1);
+ctx.clip();
+canvas.width = 100;
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 20,20, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/initial.reset.clip.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/initial.reset.clip.worker.js
new file mode 100644
index 0000000000..45ee30d080
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/initial.reset.clip.worker.js
@@ -0,0 +1,29 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:initial.reset.clip
+// Description:Resetting the canvas state resets the current clip region
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Resetting the canvas state resets the current clip region");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+canvas.width = 100;
+ctx.rect(0, 0, 1, 1);
+ctx.clip();
+canvas.width = 100;
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 20,20, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/initial.reset.different.html b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/initial.reset.different.html
new file mode 100644
index 0000000000..632bc2fd69
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/initial.reset.different.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: initial.reset.different</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>initial.reset.different</h1>
+<p class="desc">Changing size resets canvas to transparent black</p>
+
+
+<script>
+var t = async_test("Changing size resets canvas to transparent black");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 50, 50);
+_assertPixel(canvas, 20,20, 255,0,0,255);
+canvas.width = 50;
+_assertPixel(canvas, 20,20, 0,0,0,0);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/initial.reset.different.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/initial.reset.different.worker.js
new file mode 100644
index 0000000000..9d840a5963
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/initial.reset.different.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:initial.reset.different
+// Description:Changing size resets canvas to transparent black
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Changing size resets canvas to transparent black");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 50, 50);
+_assertPixel(canvas, 20,20, 255,0,0,255);
+canvas.width = 50;
+_assertPixel(canvas, 20,20, 0,0,0,0);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/initial.reset.gradient.html b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/initial.reset.gradient.html
new file mode 100644
index 0000000000..96819a07d3
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/initial.reset.gradient.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: initial.reset.gradient</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>initial.reset.gradient</h1>
+<p class="desc">Resetting the canvas state does not invalidate any existing gradients</p>
+
+
+<script>
+var t = async_test("Resetting the canvas state does not invalidate any existing gradients");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+canvas.width = 50;
+var g = ctx.createLinearGradient(0, 0, 100, 0);
+g.addColorStop(0, '#0f0');
+g.addColorStop(1, '#0f0');
+canvas.width = 100;
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/initial.reset.gradient.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/initial.reset.gradient.worker.js
new file mode 100644
index 0000000000..a18d11e86a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/initial.reset.gradient.worker.js
@@ -0,0 +1,32 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:initial.reset.gradient
+// Description:Resetting the canvas state does not invalidate any existing gradients
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Resetting the canvas state does not invalidate any existing gradients");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+canvas.width = 50;
+var g = ctx.createLinearGradient(0, 0, 100, 0);
+g.addColorStop(0, '#0f0');
+g.addColorStop(1, '#0f0');
+canvas.width = 100;
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/initial.reset.path.html b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/initial.reset.path.html
new file mode 100644
index 0000000000..3c9667ca5c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/initial.reset.path.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: initial.reset.path</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>initial.reset.path</h1>
+<p class="desc">Resetting the canvas state resets the current path</p>
+
+
+<script>
+var t = async_test("Resetting the canvas state resets the current path");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+canvas.width = 100;
+ctx.rect(0, 0, 100, 50);
+canvas.width = 100;
+ctx.fillStyle = '#f00';
+ctx.fill();
+_assertPixel(canvas, 20,20, 0,0,0,0);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/initial.reset.path.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/initial.reset.path.worker.js
new file mode 100644
index 0000000000..9f34734a58
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/initial.reset.path.worker.js
@@ -0,0 +1,28 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:initial.reset.path
+// Description:Resetting the canvas state resets the current path
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Resetting the canvas state resets the current path");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+canvas.width = 100;
+ctx.rect(0, 0, 100, 50);
+canvas.width = 100;
+ctx.fillStyle = '#f00';
+ctx.fill();
+_assertPixel(canvas, 20,20, 0,0,0,0);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/initial.reset.pattern.html b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/initial.reset.pattern.html
new file mode 100644
index 0000000000..3766795ba9
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/initial.reset.pattern.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: initial.reset.pattern</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>initial.reset.pattern</h1>
+<p class="desc">Resetting the canvas state does not invalidate any existing patterns</p>
+
+
+<script>
+var t = async_test("Resetting the canvas state does not invalidate any existing patterns");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+canvas.width = 30;
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 30, 50);
+var p = ctx.createPattern(canvas, 'repeat-x');
+canvas.width = 100;
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = p;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/initial.reset.pattern.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/initial.reset.pattern.worker.js
new file mode 100644
index 0000000000..1fe6c01e2d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/initial.reset.pattern.worker.js
@@ -0,0 +1,32 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:initial.reset.pattern
+// Description:Resetting the canvas state does not invalidate any existing patterns
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Resetting the canvas state does not invalidate any existing patterns");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+canvas.width = 30;
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 30, 50);
+var p = ctx.createPattern(canvas, 'repeat-x');
+canvas.width = 100;
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = p;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/initial.reset.same.html b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/initial.reset.same.html
new file mode 100644
index 0000000000..bfcf05013e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/initial.reset.same.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: initial.reset.same</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>initial.reset.same</h1>
+<p class="desc">Setting size (not changing the value) resets canvas to transparent black</p>
+
+
+<script>
+var t = async_test("Setting size (not changing the value) resets canvas to transparent black");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+canvas.width = 100;
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 50, 50);
+_assertPixel(canvas, 20,20, 255,0,0,255);
+canvas.width = 100;
+_assertPixel(canvas, 20,20, 0,0,0,0);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/initial.reset.same.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/initial.reset.same.worker.js
new file mode 100644
index 0000000000..00db682f70
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/initial.reset.same.worker.js
@@ -0,0 +1,28 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:initial.reset.same
+// Description:Setting size (not changing the value) resets canvas to transparent black
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Setting size (not changing the value) resets canvas to transparent black");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+canvas.width = 100;
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 50, 50);
+_assertPixel(canvas, 20,20, 255,0,0,255);
+canvas.width = 100;
+_assertPixel(canvas, 20,20, 0,0,0,0);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/initial.reset.transform.html b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/initial.reset.transform.html
new file mode 100644
index 0000000000..402b34f9c5
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/initial.reset.transform.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: initial.reset.transform</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>initial.reset.transform</h1>
+<p class="desc">Resetting the canvas state resets the current transformation matrix</p>
+
+
+<script>
+var t = async_test("Resetting the canvas state resets the current transformation matrix");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+canvas.width = 100;
+ctx.scale(0.1, 0.1);
+canvas.width = 100;
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 20,20, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/initial.reset.transform.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/initial.reset.transform.worker.js
new file mode 100644
index 0000000000..3fb80d061f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/initial.reset.transform.worker.js
@@ -0,0 +1,28 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:initial.reset.transform
+// Description:Resetting the canvas state resets the current transformation matrix
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Resetting the canvas state resets the current transformation matrix");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+canvas.width = 100;
+ctx.scale(0.1, 0.1);
+canvas.width = 100;
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 20,20, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.default.html b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.default.html
new file mode 100644
index 0000000000..6ebd35fbd0
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.default.html
@@ -0,0 +1,28 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: size.attributes.default</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>size.attributes.default</h1>
+<p class="desc">Default width/height when attributes are missing</p>
+
+
+<script>
+var t = async_test("Default width/height when attributes are missing");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertSame(canvas.width, 100, "canvas.width", "100");
+_assertSame(canvas.height, 50, "canvas.height", "50");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.default.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.default.worker.js
new file mode 100644
index 0000000000..c77b8a4929
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.default.worker.js
@@ -0,0 +1,24 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:size.attributes.default
+// Description:Default width/height when attributes are missing
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Default width/height when attributes are missing");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+_assertSame(canvas.width, 100, "canvas.width", "100");
+_assertSame(canvas.height, 50, "canvas.height", "50");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.idl.html b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.idl.html
new file mode 100644
index 0000000000..fda4e92603
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.idl.html
@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: size.attributes.idl</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>size.attributes.idl</h1>
+<p class="desc">Getting/setting width/height IDL attributes</p>
+
+
+<script>
+var t = async_test("Getting/setting width/height IDL attributes");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+canvas.width = "100";
+canvas.height = "100";
+_assertSame(canvas.width, 100, "canvas.width", "100");
+_assertSame(canvas.height, 100, "canvas.height", "100");
+canvas.width = "+1.5e2";
+canvas.height = "0x96";
+_assertSame(canvas.width, 150, "canvas.width", "150");
+_assertSame(canvas.height, 150, "canvas.height", "150");
+canvas.width = 301.999;
+canvas.height = 301.001;
+_assertSame(canvas.width, 301, "canvas.width", "301");
+_assertSame(canvas.height, 301, "canvas.height", "301");
+assert_throws_js(TypeError, function() { canvas.width = "400x"; });
+assert_throws_js(TypeError, function() { canvas.height = "foo"; });
+_assertSame(canvas.width, 301, "canvas.width", "301");
+_assertSame(canvas.height, 301, "canvas.height", "301");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.idl.set.zero.html b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.idl.set.zero.html
new file mode 100644
index 0000000000..4bf7b9c41b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.idl.set.zero.html
@@ -0,0 +1,30 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: size.attributes.idl.set.zero</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>size.attributes.idl.set.zero</h1>
+<p class="desc">Setting width/height IDL attributes to 0</p>
+
+
+<script>
+var t = async_test("Setting width/height IDL attributes to 0");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+canvas.width = 0;
+canvas.height = 0;
+_assertSame(canvas.width, 0, "canvas.width", "0");
+_assertSame(canvas.height, 0, "canvas.height", "0");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.idl.set.zero.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.idl.set.zero.worker.js
new file mode 100644
index 0000000000..2ecf19974e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.idl.set.zero.worker.js
@@ -0,0 +1,26 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:size.attributes.idl.set.zero
+// Description:Setting width/height IDL attributes to 0
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Setting width/height IDL attributes to 0");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+canvas.width = 0;
+canvas.height = 0;
+_assertSame(canvas.width, 0, "canvas.width", "0");
+_assertSame(canvas.height, 0, "canvas.height", "0");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.idl.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.idl.worker.js
new file mode 100644
index 0000000000..16350aeacd
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.idl.worker.js
@@ -0,0 +1,38 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:size.attributes.idl
+// Description:Getting/setting width/height IDL attributes
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Getting/setting width/height IDL attributes");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+canvas.width = "100";
+canvas.height = "100";
+_assertSame(canvas.width, 100, "canvas.width", "100");
+_assertSame(canvas.height, 100, "canvas.height", "100");
+canvas.width = "+1.5e2";
+canvas.height = "0x96";
+_assertSame(canvas.width, 150, "canvas.width", "150");
+_assertSame(canvas.height, 150, "canvas.height", "150");
+canvas.width = 301.999;
+canvas.height = 301.001;
+_assertSame(canvas.width, 301, "canvas.width", "301");
+_assertSame(canvas.height, 301, "canvas.height", "301");
+assert_throws_js(TypeError, function() { canvas.width = "400x"; });
+assert_throws_js(TypeError, function() { canvas.height = "foo"; });
+_assertSame(canvas.width, 301, "canvas.width", "301");
+_assertSame(canvas.height, 301, "canvas.height", "301");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.decimal.html b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.decimal.html
new file mode 100644
index 0000000000..a74fe15899
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.decimal.html
@@ -0,0 +1,30 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: size.attributes.parse.decimal</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>size.attributes.parse.decimal</h1>
+<p class="desc">Parsing of non-negative integers</p>
+
+
+<script>
+var t = async_test("Parsing of non-negative integers");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+canvas.width = '100.999';
+canvas.height = '100.999';
+_assertSame(canvas.width, 100, "canvas.width", "100");
+_assertSame(canvas.height, 100, "canvas.height", "100");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.decimal.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.decimal.worker.js
new file mode 100644
index 0000000000..7b982e8d87
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.decimal.worker.js
@@ -0,0 +1,26 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:size.attributes.parse.decimal
+// Description:Parsing of non-negative integers
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Parsing of non-negative integers");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+canvas.width = '100.999';
+canvas.height = '100.999';
+_assertSame(canvas.width, 100, "canvas.width", "100");
+_assertSame(canvas.height, 100, "canvas.height", "100");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.em.html b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.em.html
new file mode 100644
index 0000000000..5a8eee2c8e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.em.html
@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: size.attributes.parse.em</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>size.attributes.parse.em</h1>
+<p class="desc">Parsing of non-negative integers</p>
+
+
+<script>
+var t = async_test("Parsing of non-negative integers");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_js(TypeError, function() { canvas.width = '100em'; });
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.em.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.em.worker.js
new file mode 100644
index 0000000000..a0248d4efc
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.em.worker.js
@@ -0,0 +1,23 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:size.attributes.parse.em
+// Description:Parsing of non-negative integers
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Parsing of non-negative integers");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_js(TypeError, function() { canvas.width = '100em'; });
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.empty.html b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.empty.html
new file mode 100644
index 0000000000..eab54b013f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.empty.html
@@ -0,0 +1,30 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: size.attributes.parse.empty</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>size.attributes.parse.empty</h1>
+<p class="desc">Parsing of non-negative integers</p>
+
+
+<script>
+var t = async_test("Parsing of non-negative integers");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+canvas.width = '';
+canvas.height = '';
+_assertSame(canvas.width, 0, "canvas.width", "0");
+_assertSame(canvas.height, 0, "canvas.height", "0");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.empty.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.empty.worker.js
new file mode 100644
index 0000000000..93b6cd6fc2
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.empty.worker.js
@@ -0,0 +1,26 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:size.attributes.parse.empty
+// Description:Parsing of non-negative integers
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Parsing of non-negative integers");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+canvas.width = '';
+canvas.height = '';
+_assertSame(canvas.width, 0, "canvas.width", "0");
+_assertSame(canvas.height, 0, "canvas.height", "0");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.exp.html b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.exp.html
new file mode 100644
index 0000000000..abfddf1858
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.exp.html
@@ -0,0 +1,30 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: size.attributes.parse.exp</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>size.attributes.parse.exp</h1>
+<p class="desc">Parsing of non-negative integers</p>
+
+
+<script>
+var t = async_test("Parsing of non-negative integers");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+canvas.width = '100e1';
+canvas.height = '100e1';
+_assertSame(canvas.width, 1000.0, "canvas.width", "1000.0");
+_assertSame(canvas.height, 1000.0, "canvas.height", "1000.0");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.exp.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.exp.worker.js
new file mode 100644
index 0000000000..79fb413f37
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.exp.worker.js
@@ -0,0 +1,26 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:size.attributes.parse.exp
+// Description:Parsing of non-negative integers
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Parsing of non-negative integers");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+canvas.width = '100e1';
+canvas.height = '100e1';
+_assertSame(canvas.width, 1000.0, "canvas.width", "1000.0");
+_assertSame(canvas.height, 1000.0, "canvas.height", "1000.0");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.hex.html b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.hex.html
new file mode 100644
index 0000000000..fba289087f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.hex.html
@@ -0,0 +1,30 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: size.attributes.parse.hex</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>size.attributes.parse.hex</h1>
+<p class="desc">Parsing of non-negative integers</p>
+
+
+<script>
+var t = async_test("Parsing of non-negative integers");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+canvas.width = '0x100';
+canvas.height = '0x100';
+_assertSame(canvas.width, 256, "canvas.width", "256");
+_assertSame(canvas.height, 256, "canvas.height", "256");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.hex.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.hex.worker.js
new file mode 100644
index 0000000000..b178c55646
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.hex.worker.js
@@ -0,0 +1,26 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:size.attributes.parse.hex
+// Description:Parsing of non-negative integers
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Parsing of non-negative integers");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+canvas.width = '0x100';
+canvas.height = '0x100';
+_assertSame(canvas.width, 256, "canvas.width", "256");
+_assertSame(canvas.height, 256, "canvas.height", "256");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.junk.html b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.junk.html
new file mode 100644
index 0000000000..3ffb674b9e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.junk.html
@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: size.attributes.parse.junk</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>size.attributes.parse.junk</h1>
+<p class="desc">Parsing of non-negative integers</p>
+
+
+<script>
+var t = async_test("Parsing of non-negative integers");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_js(TypeError, function() { canvas.width = '#!?'; });
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.junk.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.junk.worker.js
new file mode 100644
index 0000000000..6efd3ae5c2
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.junk.worker.js
@@ -0,0 +1,23 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:size.attributes.parse.junk
+// Description:Parsing of non-negative integers
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Parsing of non-negative integers");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_js(TypeError, function() { canvas.width = '#!?'; });
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.minus.html b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.minus.html
new file mode 100644
index 0000000000..56435547ca
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.minus.html
@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: size.attributes.parse.minus</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>size.attributes.parse.minus</h1>
+<p class="desc">Parsing of non-negative integers</p>
+
+
+<script>
+var t = async_test("Parsing of non-negative integers");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_js(TypeError, function() { canvas.width = '-100'; });
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.minus.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.minus.worker.js
new file mode 100644
index 0000000000..a5837528ef
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.minus.worker.js
@@ -0,0 +1,23 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:size.attributes.parse.minus
+// Description:Parsing of non-negative integers
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Parsing of non-negative integers");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_js(TypeError, function() { canvas.width = '-100'; });
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.octal.html b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.octal.html
new file mode 100644
index 0000000000..d452217015
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.octal.html
@@ -0,0 +1,30 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: size.attributes.parse.octal</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>size.attributes.parse.octal</h1>
+<p class="desc">Parsing of non-negative integers</p>
+
+
+<script>
+var t = async_test("Parsing of non-negative integers");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+canvas.width = '0100';
+canvas.height = '0100';
+_assertSame(canvas.width, 100, "canvas.width", "100");
+_assertSame(canvas.height, 100, "canvas.height", "100");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.octal.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.octal.worker.js
new file mode 100644
index 0000000000..23f228e368
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.octal.worker.js
@@ -0,0 +1,26 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:size.attributes.parse.octal
+// Description:Parsing of non-negative integers
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Parsing of non-negative integers");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+canvas.width = '0100';
+canvas.height = '0100';
+_assertSame(canvas.width, 100, "canvas.width", "100");
+_assertSame(canvas.height, 100, "canvas.height", "100");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.onlyspace.html b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.onlyspace.html
new file mode 100644
index 0000000000..4164123fd1
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.onlyspace.html
@@ -0,0 +1,30 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: size.attributes.parse.onlyspace</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>size.attributes.parse.onlyspace</h1>
+<p class="desc">Parsing of non-negative integers</p>
+
+
+<script>
+var t = async_test("Parsing of non-negative integers");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+canvas.width = ' ';
+canvas.height = ' ';
+_assertSame(canvas.width, 0, "canvas.width", "0");
+_assertSame(canvas.height, 0, "canvas.height", "0");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.onlyspace.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.onlyspace.worker.js
new file mode 100644
index 0000000000..a4b86624f7
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.onlyspace.worker.js
@@ -0,0 +1,26 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:size.attributes.parse.onlyspace
+// Description:Parsing of non-negative integers
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Parsing of non-negative integers");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+canvas.width = ' ';
+canvas.height = ' ';
+_assertSame(canvas.width, 0, "canvas.width", "0");
+_assertSame(canvas.height, 0, "canvas.height", "0");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.percent.html b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.percent.html
new file mode 100644
index 0000000000..d6288e996e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.percent.html
@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: size.attributes.parse.percent</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>size.attributes.parse.percent</h1>
+<p class="desc">Parsing of non-negative integers</p>
+
+
+<script>
+var t = async_test("Parsing of non-negative integers");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_js(TypeError, function() { canvas.width = '100%'; });
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.percent.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.percent.worker.js
new file mode 100644
index 0000000000..e07fa60407
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.percent.worker.js
@@ -0,0 +1,23 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:size.attributes.parse.percent
+// Description:Parsing of non-negative integers
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Parsing of non-negative integers");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_js(TypeError, function() { canvas.width = '100%'; });
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.plus.html b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.plus.html
new file mode 100644
index 0000000000..79d531f06e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.plus.html
@@ -0,0 +1,30 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: size.attributes.parse.plus</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>size.attributes.parse.plus</h1>
+<p class="desc">Parsing of non-negative integers</p>
+
+
+<script>
+var t = async_test("Parsing of non-negative integers");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+canvas.width = '+100';
+canvas.height = '+100';
+_assertSame(canvas.width, 100, "canvas.width", "100");
+_assertSame(canvas.height, 100, "canvas.height", "100");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.plus.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.plus.worker.js
new file mode 100644
index 0000000000..240a6bd785
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.plus.worker.js
@@ -0,0 +1,26 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:size.attributes.parse.plus
+// Description:Parsing of non-negative integers
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Parsing of non-negative integers");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+canvas.width = '+100';
+canvas.height = '+100';
+_assertSame(canvas.width, 100, "canvas.width", "100");
+_assertSame(canvas.height, 100, "canvas.height", "100");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.space.html b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.space.html
new file mode 100644
index 0000000000..695afa5407
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.space.html
@@ -0,0 +1,30 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: size.attributes.parse.space</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>size.attributes.parse.space</h1>
+<p class="desc">Parsing of non-negative integers</p>
+
+
+<script>
+var t = async_test("Parsing of non-negative integers");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+canvas.width = ' 100';
+canvas.height = ' 100';
+_assertSame(canvas.width, 100, "canvas.width", "100");
+_assertSame(canvas.height, 100, "canvas.height", "100");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.space.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.space.worker.js
new file mode 100644
index 0000000000..29930209bf
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.space.worker.js
@@ -0,0 +1,26 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:size.attributes.parse.space
+// Description:Parsing of non-negative integers
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Parsing of non-negative integers");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+canvas.width = ' 100';
+canvas.height = ' 100';
+_assertSame(canvas.width, 100, "canvas.width", "100");
+_assertSame(canvas.height, 100, "canvas.height", "100");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.trailingjunk.html b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.trailingjunk.html
new file mode 100644
index 0000000000..fff231fda7
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.trailingjunk.html
@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: size.attributes.parse.trailingjunk</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>size.attributes.parse.trailingjunk</h1>
+<p class="desc">Parsing of non-negative integers</p>
+
+
+<script>
+var t = async_test("Parsing of non-negative integers");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_js(TypeError, function() { canvas.width = '100#!?'; });
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.trailingjunk.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.trailingjunk.worker.js
new file mode 100644
index 0000000000..f8d916c853
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.trailingjunk.worker.js
@@ -0,0 +1,23 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:size.attributes.parse.trailingjunk
+// Description:Parsing of non-negative integers
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Parsing of non-negative integers");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+assert_throws_js(TypeError, function() { canvas.width = '100#!?'; });
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.whitespace.html b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.whitespace.html
new file mode 100644
index 0000000000..b7f0c4b931
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.whitespace.html
@@ -0,0 +1,30 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: size.attributes.parse.whitespace</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>size.attributes.parse.whitespace</h1>
+<p class="desc">Parsing of non-negative integers</p>
+
+
+<script>
+var t = async_test("Parsing of non-negative integers");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+canvas.width = ' 100';
+canvas.height = ' 100';
+_assertSame(canvas.width, 100, "canvas.width", "100");
+_assertSame(canvas.height, 100, "canvas.height", "100");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.whitespace.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.whitespace.worker.js
new file mode 100644
index 0000000000..ea38398145
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.whitespace.worker.js
@@ -0,0 +1,26 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:size.attributes.parse.whitespace
+// Description:Parsing of non-negative integers
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Parsing of non-negative integers");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+canvas.width = ' 100';
+canvas.height = ' 100';
+_assertSame(canvas.width, 100, "canvas.width", "100");
+_assertSame(canvas.height, 100, "canvas.height", "100");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.zero.html b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.zero.html
new file mode 100644
index 0000000000..9a84c95598
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.zero.html
@@ -0,0 +1,30 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: size.attributes.parse.zero</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>size.attributes.parse.zero</h1>
+<p class="desc">Parsing of non-negative integers</p>
+
+
+<script>
+var t = async_test("Parsing of non-negative integers");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+canvas.width = '0';
+canvas.height = '0';
+_assertSame(canvas.width, 0, "canvas.width", "0");
+_assertSame(canvas.height, 0, "canvas.height", "0");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.zero.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.zero.worker.js
new file mode 100644
index 0000000000..4d97a96b42
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.parse.zero.worker.js
@@ -0,0 +1,26 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:size.attributes.parse.zero
+// Description:Parsing of non-negative integers
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Parsing of non-negative integers");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+canvas.width = '0';
+canvas.height = '0';
+_assertSame(canvas.width, 0, "canvas.width", "0");
+_assertSame(canvas.height, 0, "canvas.height", "0");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.reflect.setidl.html b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.reflect.setidl.html
new file mode 100644
index 0000000000..968dad9dda
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.reflect.setidl.html
@@ -0,0 +1,30 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: size.attributes.reflect.setidl</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>size.attributes.reflect.setidl</h1>
+<p class="desc">Setting IDL attributes updates IDL and content attributes</p>
+
+
+<script>
+var t = async_test("Setting IDL attributes updates IDL and content attributes");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+canvas.width = 120;
+canvas.height = 60;
+_assertSame(canvas.width, 120, "canvas.width", "120");
+_assertSame(canvas.height, 60, "canvas.height", "60");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.reflect.setidl.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.reflect.setidl.worker.js
new file mode 100644
index 0000000000..3f8050d549
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.reflect.setidl.worker.js
@@ -0,0 +1,26 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:size.attributes.reflect.setidl
+// Description:Setting IDL attributes updates IDL and content attributes
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Setting IDL attributes updates IDL and content attributes");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+canvas.width = 120;
+canvas.height = 60;
+_assertSame(canvas.width, 120, "canvas.width", "120");
+_assertSame(canvas.height, 60, "canvas.height", "60");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.reflect.setidlzero.html b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.reflect.setidlzero.html
new file mode 100644
index 0000000000..5f31f696cf
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.reflect.setidlzero.html
@@ -0,0 +1,30 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: size.attributes.reflect.setidlzero</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>size.attributes.reflect.setidlzero</h1>
+<p class="desc">Setting IDL attributes to 0 updates IDL and content attributes</p>
+
+
+<script>
+var t = async_test("Setting IDL attributes to 0 updates IDL and content attributes");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+canvas.width = 0;
+canvas.height = 0;
+_assertSame(canvas.width, 0, "canvas.width", "0");
+_assertSame(canvas.height, 0, "canvas.height", "0");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.reflect.setidlzero.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.reflect.setidlzero.worker.js
new file mode 100644
index 0000000000..4ace1f5edb
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.attributes.reflect.setidlzero.worker.js
@@ -0,0 +1,26 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:size.attributes.reflect.setidlzero
+// Description:Setting IDL attributes to 0 updates IDL and content attributes
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Setting IDL attributes to 0 updates IDL and content attributes");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+canvas.width = 0;
+canvas.height = 0;
+_assertSame(canvas.width, 0, "canvas.width", "0");
+_assertSame(canvas.height, 0, "canvas.height", "0");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.large.html b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.large.html
new file mode 100644
index 0000000000..9f41e2e23a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.large.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: size.large</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>size.large</h1>
+<p class="desc"></p>
+
+<p class="notes">Not sure how reasonable this is, but the spec doesn't say there's an upper limit on the size.
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var n = 2147483647; // 2^31 - 1, which should be supported by any sensible definition of "long"
+canvas.width = n;
+canvas.height = n;
+_assertSame(canvas.width, n, "canvas.width", "n");
+_assertSame(canvas.height, n, "canvas.height", "n");
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.large.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.large.worker.js
new file mode 100644
index 0000000000..b20ff54969
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-offscreen-canvas/size.large.worker.js
@@ -0,0 +1,27 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:size.large
+// Description:
+// Note:<p class="notes">Not sure how reasonable this is, but the spec doesn't say there's an upper limit on the size.
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+var n = 2147483647; // 2^31 - 1, which should be supported by any sensible definition of "long"
+canvas.width = n;
+canvas.height = n;
+_assertSame(canvas.width, n, "canvas.width", "n");
+_assertSame(canvas.height, n, "canvas.height", "n");
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.order.html b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.order.html
new file mode 100644
index 0000000000..b130803593
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.order.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.transformation.order</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.transformation.order</h1>
+<p class="desc">Transformations are applied in the right order</p>
+
+
+<script>
+var t = async_test("Transformations are applied in the right order");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.scale(2, 1);
+ctx.rotate(Math.PI / 2);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, -50, 50, 50);
+_assertPixel(canvas, 75,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.order.worker.js b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.order.worker.js
new file mode 100644
index 0000000000..7ac61067b4
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.order.worker.js
@@ -0,0 +1,29 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.transformation.order
+// Description:Transformations are applied in the right order
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Transformations are applied in the right order");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.scale(2, 1);
+ctx.rotate(Math.PI / 2);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, -50, 50, 50);
+_assertPixel(canvas, 75,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.rotate.direction.html b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.rotate.direction.html
new file mode 100644
index 0000000000..0a98c7e65f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.rotate.direction.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.transformation.rotate.direction</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.transformation.rotate.direction</h1>
+<p class="desc">rotate() is clockwise</p>
+
+
+<script>
+var t = async_test("rotate() is clockwise");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.rotate(Math.PI / 2);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, -100, 50, 100);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.rotate.direction.worker.js b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.rotate.direction.worker.js
new file mode 100644
index 0000000000..465d3b6790
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.rotate.direction.worker.js
@@ -0,0 +1,28 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.transformation.rotate.direction
+// Description:rotate() is clockwise
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("rotate() is clockwise");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.rotate(Math.PI / 2);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, -100, 50, 100);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.rotate.nonfinite.html b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.rotate.nonfinite.html
new file mode 100644
index 0000000000..0f2227a4e5
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.rotate.nonfinite.html
@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.transformation.rotate.nonfinite</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.transformation.rotate.nonfinite</h1>
+<p class="desc">rotate() with Infinity/NaN is ignored</p>
+
+
+<script>
+var t = async_test("rotate() with Infinity/NaN is ignored");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.translate(100, 10);
+ctx.rotate(Infinity);
+ctx.rotate(-Infinity);
+ctx.rotate(NaN);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(-100, -10, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.rotate.nonfinite.worker.js b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.rotate.nonfinite.worker.js
new file mode 100644
index 0000000000..56a04d874e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.rotate.nonfinite.worker.js
@@ -0,0 +1,31 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.transformation.rotate.nonfinite
+// Description:rotate() with Infinity/NaN is ignored
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("rotate() with Infinity/NaN is ignored");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.translate(100, 10);
+ctx.rotate(Infinity);
+ctx.rotate(-Infinity);
+ctx.rotate(NaN);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(-100, -10, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.rotate.radians.html b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.rotate.radians.html
new file mode 100644
index 0000000000..8a78dddd7f
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.rotate.radians.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.transformation.rotate.radians</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.transformation.rotate.radians</h1>
+<p class="desc">rotate() uses radians</p>
+
+
+<script>
+var t = async_test("rotate() uses radians");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.rotate(Math.PI); // should fail obviously if this is 3.1 degrees
+ctx.fillStyle = '#0f0';
+ctx.fillRect(-100, -50, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.rotate.radians.worker.js b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.rotate.radians.worker.js
new file mode 100644
index 0000000000..9780e68a02
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.rotate.radians.worker.js
@@ -0,0 +1,28 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.transformation.rotate.radians
+// Description:rotate() uses radians
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("rotate() uses radians");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.rotate(Math.PI); // should fail obviously if this is 3.1 degrees
+ctx.fillStyle = '#0f0';
+ctx.fillRect(-100, -50, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.rotate.wrap.html b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.rotate.wrap.html
new file mode 100644
index 0000000000..7711a8c140
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.rotate.wrap.html
@@ -0,0 +1,37 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.transformation.rotate.wrap</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.transformation.rotate.wrap</h1>
+<p class="desc">rotate() wraps large positive values correctly</p>
+
+
+<script>
+var t = async_test("rotate() wraps large positive values correctly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.rotate(Math.PI * (1 + 4096)); // == pi (mod 2*pi)
+// We need about pi +/- 0.001 in order to get correct-looking results
+// 32-bit floats can store pi*4097 with precision 2^-10, so that should
+// be safe enough on reasonable implementations
+ctx.fillStyle = '#0f0';
+ctx.fillRect(-100, -50, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 98,2, 0,255,0,255);
+_assertPixel(canvas, 98,47, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.rotate.wrap.worker.js b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.rotate.wrap.worker.js
new file mode 100644
index 0000000000..db9fbd43bc
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.rotate.wrap.worker.js
@@ -0,0 +1,33 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.transformation.rotate.wrap
+// Description:rotate() wraps large positive values correctly
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("rotate() wraps large positive values correctly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.rotate(Math.PI * (1 + 4096)); // == pi (mod 2*pi)
+// We need about pi +/- 0.001 in order to get correct-looking results
+// 32-bit floats can store pi*4097 with precision 2^-10, so that should
+// be safe enough on reasonable implementations
+ctx.fillStyle = '#0f0';
+ctx.fillRect(-100, -50, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 98,2, 0,255,0,255);
+_assertPixel(canvas, 98,47, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.rotate.wrapnegative.html b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.rotate.wrapnegative.html
new file mode 100644
index 0000000000..49959dac02
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.rotate.wrapnegative.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.transformation.rotate.wrapnegative</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.transformation.rotate.wrapnegative</h1>
+<p class="desc">rotate() wraps large negative values correctly</p>
+
+
+<script>
+var t = async_test("rotate() wraps large negative values correctly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.rotate(-Math.PI * (1 + 4096));
+ctx.fillStyle = '#0f0';
+ctx.fillRect(-100, -50, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 98,2, 0,255,0,255);
+_assertPixel(canvas, 98,47, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.rotate.wrapnegative.worker.js b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.rotate.wrapnegative.worker.js
new file mode 100644
index 0000000000..7f93f65458
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.rotate.wrapnegative.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.transformation.rotate.wrapnegative
+// Description:rotate() wraps large negative values correctly
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("rotate() wraps large negative values correctly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.rotate(-Math.PI * (1 + 4096));
+ctx.fillStyle = '#0f0';
+ctx.fillRect(-100, -50, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+_assertPixel(canvas, 98,2, 0,255,0,255);
+_assertPixel(canvas, 98,47, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.rotate.zero.html b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.rotate.zero.html
new file mode 100644
index 0000000000..2255b9973d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.rotate.zero.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.transformation.rotate.zero</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.transformation.rotate.zero</h1>
+<p class="desc">rotate() by 0 does nothing</p>
+
+
+<script>
+var t = async_test("rotate() by 0 does nothing");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.rotate(0);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.rotate.zero.worker.js b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.rotate.zero.worker.js
new file mode 100644
index 0000000000..10e00c4656
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.rotate.zero.worker.js
@@ -0,0 +1,28 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.transformation.rotate.zero
+// Description:rotate() by 0 does nothing
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("rotate() by 0 does nothing");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.rotate(0);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.scale.basic.html b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.scale.basic.html
new file mode 100644
index 0000000000..c78ac79f5a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.scale.basic.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.transformation.scale.basic</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.transformation.scale.basic</h1>
+<p class="desc">scale() works</p>
+
+
+<script>
+var t = async_test("scale() works");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.scale(2, 4);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 50, 12.5);
+_assertPixel(canvas, 90,40, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.scale.basic.worker.js b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.scale.basic.worker.js
new file mode 100644
index 0000000000..39b52d57b5
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.scale.basic.worker.js
@@ -0,0 +1,28 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.transformation.scale.basic
+// Description:scale() works
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("scale() works");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.scale(2, 4);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 50, 12.5);
+_assertPixel(canvas, 90,40, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.scale.large.html b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.scale.large.html
new file mode 100644
index 0000000000..a67d05eb2c
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.scale.large.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.transformation.scale.large</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.transformation.scale.large</h1>
+<p class="desc">scale() with large scale factors works</p>
+
+<p class="notes">Not really that large at all, but it hits the limits in Firefox.
+<script>
+var t = async_test("scale() with large scale factors works");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.scale(1e5, 1e5);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 1, 1);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.scale.large.worker.js b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.scale.large.worker.js
new file mode 100644
index 0000000000..1293cce196
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.scale.large.worker.js
@@ -0,0 +1,28 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.transformation.scale.large
+// Description:scale() with large scale factors works
+// Note:<p class="notes">Not really that large at all, but it hits the limits in Firefox.
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("scale() with large scale factors works");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.scale(1e5, 1e5);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 1, 1);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.scale.multiple.html b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.scale.multiple.html
new file mode 100644
index 0000000000..717f3d305a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.scale.multiple.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.transformation.scale.multiple</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.transformation.scale.multiple</h1>
+<p class="desc">Multiple scale()s combine</p>
+
+
+<script>
+var t = async_test("Multiple scale()s combine");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.scale(Math.sqrt(2), Math.sqrt(2));
+ctx.scale(Math.sqrt(2), Math.sqrt(2));
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 50, 25);
+_assertPixel(canvas, 90,40, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.scale.multiple.worker.js b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.scale.multiple.worker.js
new file mode 100644
index 0000000000..c5a38207ea
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.scale.multiple.worker.js
@@ -0,0 +1,29 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.transformation.scale.multiple
+// Description:Multiple scale()s combine
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("Multiple scale()s combine");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.scale(Math.sqrt(2), Math.sqrt(2));
+ctx.scale(Math.sqrt(2), Math.sqrt(2));
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 50, 25);
+_assertPixel(canvas, 90,40, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.scale.negative.html b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.scale.negative.html
new file mode 100644
index 0000000000..fbcec5d763
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.scale.negative.html
@@ -0,0 +1,40 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.transformation.scale.negative</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.transformation.scale.negative</h1>
+<p class="desc">scale() with negative scale factors works</p>
+
+
+<script>
+var t = async_test("scale() with negative scale factors works");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.save();
+ctx.scale(-1, 1);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(-50, 0, 50, 50);
+ctx.restore();
+ctx.save();
+ctx.scale(1, -1);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(50, -50, 50, 50);
+ctx.restore();
+_assertPixel(canvas, 25,25, 0,255,0,255);
+_assertPixel(canvas, 75,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.scale.negative.worker.js b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.scale.negative.worker.js
new file mode 100644
index 0000000000..a5344a9a71
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.scale.negative.worker.js
@@ -0,0 +1,36 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.transformation.scale.negative
+// Description:scale() with negative scale factors works
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("scale() with negative scale factors works");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.save();
+ctx.scale(-1, 1);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(-50, 0, 50, 50);
+ctx.restore();
+ctx.save();
+ctx.scale(1, -1);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(50, -50, 50, 50);
+ctx.restore();
+_assertPixel(canvas, 25,25, 0,255,0,255);
+_assertPixel(canvas, 75,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.scale.nonfinite.html b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.scale.nonfinite.html
new file mode 100644
index 0000000000..ac38bc1fa4
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.scale.nonfinite.html
@@ -0,0 +1,39 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.transformation.scale.nonfinite</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.transformation.scale.nonfinite</h1>
+<p class="desc">scale() with Infinity/NaN is ignored</p>
+
+
+<script>
+var t = async_test("scale() with Infinity/NaN is ignored");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.translate(100, 10);
+ctx.scale(Infinity, 0.1);
+ctx.scale(-Infinity, 0.1);
+ctx.scale(NaN, 0.1);
+ctx.scale(0.1, Infinity);
+ctx.scale(0.1, -Infinity);
+ctx.scale(0.1, NaN);
+ctx.scale(Infinity, Infinity);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(-100, -10, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.scale.nonfinite.worker.js b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.scale.nonfinite.worker.js
new file mode 100644
index 0000000000..95e9922b69
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.scale.nonfinite.worker.js
@@ -0,0 +1,35 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.transformation.scale.nonfinite
+// Description:scale() with Infinity/NaN is ignored
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("scale() with Infinity/NaN is ignored");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.translate(100, 10);
+ctx.scale(Infinity, 0.1);
+ctx.scale(-Infinity, 0.1);
+ctx.scale(NaN, 0.1);
+ctx.scale(0.1, Infinity);
+ctx.scale(0.1, -Infinity);
+ctx.scale(0.1, NaN);
+ctx.scale(Infinity, Infinity);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(-100, -10, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.scale.zero.html b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.scale.zero.html
new file mode 100644
index 0000000000..9eae3b1db3
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.scale.zero.html
@@ -0,0 +1,41 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.transformation.scale.zero</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.transformation.scale.zero</h1>
+<p class="desc">scale() with a scale factor of zero works</p>
+
+
+<script>
+var t = async_test("scale() with a scale factor of zero works");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.save();
+ctx.translate(50, 0);
+ctx.scale(0, 1);
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.restore();
+ctx.save();
+ctx.translate(0, 25);
+ctx.scale(1, 0);
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.restore();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.scale.zero.worker.js b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.scale.zero.worker.js
new file mode 100644
index 0000000000..0f8dad0442
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.scale.zero.worker.js
@@ -0,0 +1,37 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.transformation.scale.zero
+// Description:scale() with a scale factor of zero works
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("scale() with a scale factor of zero works");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.save();
+ctx.translate(50, 0);
+ctx.scale(0, 1);
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.restore();
+ctx.save();
+ctx.translate(0, 25);
+ctx.scale(1, 0);
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.restore();
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.setTransform.multiple.html b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.setTransform.multiple.html
new file mode 100644
index 0000000000..f8dfb04881
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.setTransform.multiple.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.transformation.setTransform.multiple</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.transformation.setTransform.multiple</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.setTransform(1/2,0, 0,1/2, 0,0);
+ctx.setTransform(2,0, 0,2, 0,0);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 50, 25);
+_assertPixel(canvas, 75,35, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.setTransform.multiple.worker.js b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.setTransform.multiple.worker.js
new file mode 100644
index 0000000000..9d01c1302e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.setTransform.multiple.worker.js
@@ -0,0 +1,29 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.transformation.setTransform.multiple
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.setTransform(1/2,0, 0,1/2, 0,0);
+ctx.setTransform(2,0, 0,2, 0,0);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 50, 25);
+_assertPixel(canvas, 75,35, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.setTransform.nonfinite.html b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.setTransform.nonfinite.html
new file mode 100644
index 0000000000..fbed341a04
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.setTransform.nonfinite.html
@@ -0,0 +1,107 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.transformation.setTransform.nonfinite</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.transformation.setTransform.nonfinite</h1>
+<p class="desc">setTransform() with Infinity/NaN is ignored</p>
+
+
+<script>
+var t = async_test("setTransform() with Infinity/NaN is ignored");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.translate(100, 10);
+ctx.setTransform(Infinity, 0, 0, 0, 0, 0);
+ctx.setTransform(-Infinity, 0, 0, 0, 0, 0);
+ctx.setTransform(NaN, 0, 0, 0, 0, 0);
+ctx.setTransform(0, Infinity, 0, 0, 0, 0);
+ctx.setTransform(0, -Infinity, 0, 0, 0, 0);
+ctx.setTransform(0, NaN, 0, 0, 0, 0);
+ctx.setTransform(0, 0, Infinity, 0, 0, 0);
+ctx.setTransform(0, 0, -Infinity, 0, 0, 0);
+ctx.setTransform(0, 0, NaN, 0, 0, 0);
+ctx.setTransform(0, 0, 0, Infinity, 0, 0);
+ctx.setTransform(0, 0, 0, -Infinity, 0, 0);
+ctx.setTransform(0, 0, 0, NaN, 0, 0);
+ctx.setTransform(0, 0, 0, 0, Infinity, 0);
+ctx.setTransform(0, 0, 0, 0, -Infinity, 0);
+ctx.setTransform(0, 0, 0, 0, NaN, 0);
+ctx.setTransform(0, 0, 0, 0, 0, Infinity);
+ctx.setTransform(0, 0, 0, 0, 0, -Infinity);
+ctx.setTransform(0, 0, 0, 0, 0, NaN);
+ctx.setTransform(Infinity, Infinity, 0, 0, 0, 0);
+ctx.setTransform(Infinity, Infinity, Infinity, 0, 0, 0);
+ctx.setTransform(Infinity, Infinity, Infinity, Infinity, 0, 0);
+ctx.setTransform(Infinity, Infinity, Infinity, Infinity, Infinity, 0);
+ctx.setTransform(Infinity, Infinity, Infinity, Infinity, Infinity, Infinity);
+ctx.setTransform(Infinity, Infinity, Infinity, Infinity, 0, Infinity);
+ctx.setTransform(Infinity, Infinity, Infinity, 0, Infinity, 0);
+ctx.setTransform(Infinity, Infinity, Infinity, 0, Infinity, Infinity);
+ctx.setTransform(Infinity, Infinity, Infinity, 0, 0, Infinity);
+ctx.setTransform(Infinity, Infinity, 0, Infinity, 0, 0);
+ctx.setTransform(Infinity, Infinity, 0, Infinity, Infinity, 0);
+ctx.setTransform(Infinity, Infinity, 0, Infinity, Infinity, Infinity);
+ctx.setTransform(Infinity, Infinity, 0, Infinity, 0, Infinity);
+ctx.setTransform(Infinity, Infinity, 0, 0, Infinity, 0);
+ctx.setTransform(Infinity, Infinity, 0, 0, Infinity, Infinity);
+ctx.setTransform(Infinity, Infinity, 0, 0, 0, Infinity);
+ctx.setTransform(Infinity, 0, Infinity, 0, 0, 0);
+ctx.setTransform(Infinity, 0, Infinity, Infinity, 0, 0);
+ctx.setTransform(Infinity, 0, Infinity, Infinity, Infinity, 0);
+ctx.setTransform(Infinity, 0, Infinity, Infinity, Infinity, Infinity);
+ctx.setTransform(Infinity, 0, Infinity, Infinity, 0, Infinity);
+ctx.setTransform(Infinity, 0, Infinity, 0, Infinity, 0);
+ctx.setTransform(Infinity, 0, Infinity, 0, Infinity, Infinity);
+ctx.setTransform(Infinity, 0, Infinity, 0, 0, Infinity);
+ctx.setTransform(Infinity, 0, 0, Infinity, 0, 0);
+ctx.setTransform(Infinity, 0, 0, Infinity, Infinity, 0);
+ctx.setTransform(Infinity, 0, 0, Infinity, Infinity, Infinity);
+ctx.setTransform(Infinity, 0, 0, Infinity, 0, Infinity);
+ctx.setTransform(Infinity, 0, 0, 0, Infinity, 0);
+ctx.setTransform(Infinity, 0, 0, 0, Infinity, Infinity);
+ctx.setTransform(Infinity, 0, 0, 0, 0, Infinity);
+ctx.setTransform(0, Infinity, Infinity, 0, 0, 0);
+ctx.setTransform(0, Infinity, Infinity, Infinity, 0, 0);
+ctx.setTransform(0, Infinity, Infinity, Infinity, Infinity, 0);
+ctx.setTransform(0, Infinity, Infinity, Infinity, Infinity, Infinity);
+ctx.setTransform(0, Infinity, Infinity, Infinity, 0, Infinity);
+ctx.setTransform(0, Infinity, Infinity, 0, Infinity, 0);
+ctx.setTransform(0, Infinity, Infinity, 0, Infinity, Infinity);
+ctx.setTransform(0, Infinity, Infinity, 0, 0, Infinity);
+ctx.setTransform(0, Infinity, 0, Infinity, 0, 0);
+ctx.setTransform(0, Infinity, 0, Infinity, Infinity, 0);
+ctx.setTransform(0, Infinity, 0, Infinity, Infinity, Infinity);
+ctx.setTransform(0, Infinity, 0, Infinity, 0, Infinity);
+ctx.setTransform(0, Infinity, 0, 0, Infinity, 0);
+ctx.setTransform(0, Infinity, 0, 0, Infinity, Infinity);
+ctx.setTransform(0, Infinity, 0, 0, 0, Infinity);
+ctx.setTransform(0, 0, Infinity, Infinity, 0, 0);
+ctx.setTransform(0, 0, Infinity, Infinity, Infinity, 0);
+ctx.setTransform(0, 0, Infinity, Infinity, Infinity, Infinity);
+ctx.setTransform(0, 0, Infinity, Infinity, 0, Infinity);
+ctx.setTransform(0, 0, Infinity, 0, Infinity, 0);
+ctx.setTransform(0, 0, Infinity, 0, Infinity, Infinity);
+ctx.setTransform(0, 0, Infinity, 0, 0, Infinity);
+ctx.setTransform(0, 0, 0, Infinity, Infinity, 0);
+ctx.setTransform(0, 0, 0, Infinity, Infinity, Infinity);
+ctx.setTransform(0, 0, 0, Infinity, 0, Infinity);
+ctx.setTransform(0, 0, 0, 0, Infinity, Infinity);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(-100, -10, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.setTransform.nonfinite.worker.js b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.setTransform.nonfinite.worker.js
new file mode 100644
index 0000000000..be7e055a85
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.setTransform.nonfinite.worker.js
@@ -0,0 +1,103 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.transformation.setTransform.nonfinite
+// Description:setTransform() with Infinity/NaN is ignored
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("setTransform() with Infinity/NaN is ignored");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.translate(100, 10);
+ctx.setTransform(Infinity, 0, 0, 0, 0, 0);
+ctx.setTransform(-Infinity, 0, 0, 0, 0, 0);
+ctx.setTransform(NaN, 0, 0, 0, 0, 0);
+ctx.setTransform(0, Infinity, 0, 0, 0, 0);
+ctx.setTransform(0, -Infinity, 0, 0, 0, 0);
+ctx.setTransform(0, NaN, 0, 0, 0, 0);
+ctx.setTransform(0, 0, Infinity, 0, 0, 0);
+ctx.setTransform(0, 0, -Infinity, 0, 0, 0);
+ctx.setTransform(0, 0, NaN, 0, 0, 0);
+ctx.setTransform(0, 0, 0, Infinity, 0, 0);
+ctx.setTransform(0, 0, 0, -Infinity, 0, 0);
+ctx.setTransform(0, 0, 0, NaN, 0, 0);
+ctx.setTransform(0, 0, 0, 0, Infinity, 0);
+ctx.setTransform(0, 0, 0, 0, -Infinity, 0);
+ctx.setTransform(0, 0, 0, 0, NaN, 0);
+ctx.setTransform(0, 0, 0, 0, 0, Infinity);
+ctx.setTransform(0, 0, 0, 0, 0, -Infinity);
+ctx.setTransform(0, 0, 0, 0, 0, NaN);
+ctx.setTransform(Infinity, Infinity, 0, 0, 0, 0);
+ctx.setTransform(Infinity, Infinity, Infinity, 0, 0, 0);
+ctx.setTransform(Infinity, Infinity, Infinity, Infinity, 0, 0);
+ctx.setTransform(Infinity, Infinity, Infinity, Infinity, Infinity, 0);
+ctx.setTransform(Infinity, Infinity, Infinity, Infinity, Infinity, Infinity);
+ctx.setTransform(Infinity, Infinity, Infinity, Infinity, 0, Infinity);
+ctx.setTransform(Infinity, Infinity, Infinity, 0, Infinity, 0);
+ctx.setTransform(Infinity, Infinity, Infinity, 0, Infinity, Infinity);
+ctx.setTransform(Infinity, Infinity, Infinity, 0, 0, Infinity);
+ctx.setTransform(Infinity, Infinity, 0, Infinity, 0, 0);
+ctx.setTransform(Infinity, Infinity, 0, Infinity, Infinity, 0);
+ctx.setTransform(Infinity, Infinity, 0, Infinity, Infinity, Infinity);
+ctx.setTransform(Infinity, Infinity, 0, Infinity, 0, Infinity);
+ctx.setTransform(Infinity, Infinity, 0, 0, Infinity, 0);
+ctx.setTransform(Infinity, Infinity, 0, 0, Infinity, Infinity);
+ctx.setTransform(Infinity, Infinity, 0, 0, 0, Infinity);
+ctx.setTransform(Infinity, 0, Infinity, 0, 0, 0);
+ctx.setTransform(Infinity, 0, Infinity, Infinity, 0, 0);
+ctx.setTransform(Infinity, 0, Infinity, Infinity, Infinity, 0);
+ctx.setTransform(Infinity, 0, Infinity, Infinity, Infinity, Infinity);
+ctx.setTransform(Infinity, 0, Infinity, Infinity, 0, Infinity);
+ctx.setTransform(Infinity, 0, Infinity, 0, Infinity, 0);
+ctx.setTransform(Infinity, 0, Infinity, 0, Infinity, Infinity);
+ctx.setTransform(Infinity, 0, Infinity, 0, 0, Infinity);
+ctx.setTransform(Infinity, 0, 0, Infinity, 0, 0);
+ctx.setTransform(Infinity, 0, 0, Infinity, Infinity, 0);
+ctx.setTransform(Infinity, 0, 0, Infinity, Infinity, Infinity);
+ctx.setTransform(Infinity, 0, 0, Infinity, 0, Infinity);
+ctx.setTransform(Infinity, 0, 0, 0, Infinity, 0);
+ctx.setTransform(Infinity, 0, 0, 0, Infinity, Infinity);
+ctx.setTransform(Infinity, 0, 0, 0, 0, Infinity);
+ctx.setTransform(0, Infinity, Infinity, 0, 0, 0);
+ctx.setTransform(0, Infinity, Infinity, Infinity, 0, 0);
+ctx.setTransform(0, Infinity, Infinity, Infinity, Infinity, 0);
+ctx.setTransform(0, Infinity, Infinity, Infinity, Infinity, Infinity);
+ctx.setTransform(0, Infinity, Infinity, Infinity, 0, Infinity);
+ctx.setTransform(0, Infinity, Infinity, 0, Infinity, 0);
+ctx.setTransform(0, Infinity, Infinity, 0, Infinity, Infinity);
+ctx.setTransform(0, Infinity, Infinity, 0, 0, Infinity);
+ctx.setTransform(0, Infinity, 0, Infinity, 0, 0);
+ctx.setTransform(0, Infinity, 0, Infinity, Infinity, 0);
+ctx.setTransform(0, Infinity, 0, Infinity, Infinity, Infinity);
+ctx.setTransform(0, Infinity, 0, Infinity, 0, Infinity);
+ctx.setTransform(0, Infinity, 0, 0, Infinity, 0);
+ctx.setTransform(0, Infinity, 0, 0, Infinity, Infinity);
+ctx.setTransform(0, Infinity, 0, 0, 0, Infinity);
+ctx.setTransform(0, 0, Infinity, Infinity, 0, 0);
+ctx.setTransform(0, 0, Infinity, Infinity, Infinity, 0);
+ctx.setTransform(0, 0, Infinity, Infinity, Infinity, Infinity);
+ctx.setTransform(0, 0, Infinity, Infinity, 0, Infinity);
+ctx.setTransform(0, 0, Infinity, 0, Infinity, 0);
+ctx.setTransform(0, 0, Infinity, 0, Infinity, Infinity);
+ctx.setTransform(0, 0, Infinity, 0, 0, Infinity);
+ctx.setTransform(0, 0, 0, Infinity, Infinity, 0);
+ctx.setTransform(0, 0, 0, Infinity, Infinity, Infinity);
+ctx.setTransform(0, 0, 0, Infinity, 0, Infinity);
+ctx.setTransform(0, 0, 0, 0, Infinity, Infinity);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(-100, -10, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.setTransform.skewed.html b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.setTransform.skewed.html
new file mode 100644
index 0000000000..40fa8015d4
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.setTransform.skewed.html
@@ -0,0 +1,54 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.transformation.setTransform.skewed</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.transformation.setTransform.skewed</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+// Create green with a red square ring inside it
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.fillRect(20, 10, 60, 30);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(40, 20, 20, 10);
+// Draw a skewed shape to fill that gap, to make sure it is aligned correctly
+ctx.setTransform(1,4, 2,3, 5,6);
+// Post-transform coordinates:
+// [[20,10],[80,10],[80,40],[20,40],[20,10],[40,20],[40,30],[60,30],[60,20],[40,20],[20,10]];
+// Hence pre-transform coordinates:
+var pts=[[-7.4,11.2],[-43.4,59.2],[-31.4,53.2],[4.6,5.2],[-7.4,11.2],
+ [-15.4,25.2],[-11.4,23.2],[-23.4,39.2],[-27.4,41.2],[-15.4,25.2],
+ [-7.4,11.2]];
+ctx.beginPath();
+ctx.moveTo(pts[0][0], pts[0][1]);
+for (var i = 0; i < pts.length; ++i)
+ ctx.lineTo(pts[i][0], pts[i][1]);
+ctx.fill();
+_assertPixel(canvas, 21,11, 0,255,0,255);
+_assertPixel(canvas, 79,11, 0,255,0,255);
+_assertPixel(canvas, 21,39, 0,255,0,255);
+_assertPixel(canvas, 79,39, 0,255,0,255);
+_assertPixel(canvas, 39,19, 0,255,0,255);
+_assertPixel(canvas, 61,19, 0,255,0,255);
+_assertPixel(canvas, 39,31, 0,255,0,255);
+_assertPixel(canvas, 61,31, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.setTransform.skewed.worker.js b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.setTransform.skewed.worker.js
new file mode 100644
index 0000000000..6490f9b709
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.setTransform.skewed.worker.js
@@ -0,0 +1,50 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.transformation.setTransform.skewed
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+// Create green with a red square ring inside it
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.fillRect(20, 10, 60, 30);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(40, 20, 20, 10);
+// Draw a skewed shape to fill that gap, to make sure it is aligned correctly
+ctx.setTransform(1,4, 2,3, 5,6);
+// Post-transform coordinates:
+// [[20,10],[80,10],[80,40],[20,40],[20,10],[40,20],[40,30],[60,30],[60,20],[40,20],[20,10]];
+// Hence pre-transform coordinates:
+var pts=[[-7.4,11.2],[-43.4,59.2],[-31.4,53.2],[4.6,5.2],[-7.4,11.2],
+ [-15.4,25.2],[-11.4,23.2],[-23.4,39.2],[-27.4,41.2],[-15.4,25.2],
+ [-7.4,11.2]];
+ctx.beginPath();
+ctx.moveTo(pts[0][0], pts[0][1]);
+for (var i = 0; i < pts.length; ++i)
+ ctx.lineTo(pts[i][0], pts[i][1]);
+ctx.fill();
+_assertPixel(canvas, 21,11, 0,255,0,255);
+_assertPixel(canvas, 79,11, 0,255,0,255);
+_assertPixel(canvas, 21,39, 0,255,0,255);
+_assertPixel(canvas, 79,39, 0,255,0,255);
+_assertPixel(canvas, 39,19, 0,255,0,255);
+_assertPixel(canvas, 61,19, 0,255,0,255);
+_assertPixel(canvas, 39,31, 0,255,0,255);
+_assertPixel(canvas, 61,31, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.transform.identity.html b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.transform.identity.html
new file mode 100644
index 0000000000..92753bc9e3
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.transform.identity.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.transformation.transform.identity</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.transformation.transform.identity</h1>
+<p class="desc">transform() with the identity matrix does nothing</p>
+
+
+<script>
+var t = async_test("transform() with the identity matrix does nothing");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.transform(1,0, 0,1, 0,0);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.transform.identity.worker.js b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.transform.identity.worker.js
new file mode 100644
index 0000000000..99ac58d49d
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.transform.identity.worker.js
@@ -0,0 +1,28 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.transformation.transform.identity
+// Description:transform() with the identity matrix does nothing
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("transform() with the identity matrix does nothing");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.transform(1,0, 0,1, 0,0);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.transform.multiply.html b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.transform.multiply.html
new file mode 100644
index 0000000000..f69fa4330a
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.transform.multiply.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.transformation.transform.multiply</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.transformation.transform.multiply</h1>
+<p class="desc">transform() multiplies the CTM</p>
+
+
+<script>
+var t = async_test("transform() multiplies the CTM");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.transform(1,2, 3,4, 5,6);
+ctx.transform(-2,1, 3/2,-1/2, 1,-2);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.transform.multiply.worker.js b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.transform.multiply.worker.js
new file mode 100644
index 0000000000..1a0e702a05
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.transform.multiply.worker.js
@@ -0,0 +1,29 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.transformation.transform.multiply
+// Description:transform() multiplies the CTM
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("transform() multiplies the CTM");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.transform(1,2, 3,4, 5,6);
+ctx.transform(-2,1, 3/2,-1/2, 1,-2);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.transform.nonfinite.html b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.transform.nonfinite.html
new file mode 100644
index 0000000000..6e679341d5
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.transform.nonfinite.html
@@ -0,0 +1,107 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.transformation.transform.nonfinite</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.transformation.transform.nonfinite</h1>
+<p class="desc">transform() with Infinity/NaN is ignored</p>
+
+
+<script>
+var t = async_test("transform() with Infinity/NaN is ignored");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.translate(100, 10);
+ctx.transform(Infinity, 0, 0, 0, 0, 0);
+ctx.transform(-Infinity, 0, 0, 0, 0, 0);
+ctx.transform(NaN, 0, 0, 0, 0, 0);
+ctx.transform(0, Infinity, 0, 0, 0, 0);
+ctx.transform(0, -Infinity, 0, 0, 0, 0);
+ctx.transform(0, NaN, 0, 0, 0, 0);
+ctx.transform(0, 0, Infinity, 0, 0, 0);
+ctx.transform(0, 0, -Infinity, 0, 0, 0);
+ctx.transform(0, 0, NaN, 0, 0, 0);
+ctx.transform(0, 0, 0, Infinity, 0, 0);
+ctx.transform(0, 0, 0, -Infinity, 0, 0);
+ctx.transform(0, 0, 0, NaN, 0, 0);
+ctx.transform(0, 0, 0, 0, Infinity, 0);
+ctx.transform(0, 0, 0, 0, -Infinity, 0);
+ctx.transform(0, 0, 0, 0, NaN, 0);
+ctx.transform(0, 0, 0, 0, 0, Infinity);
+ctx.transform(0, 0, 0, 0, 0, -Infinity);
+ctx.transform(0, 0, 0, 0, 0, NaN);
+ctx.transform(Infinity, Infinity, 0, 0, 0, 0);
+ctx.transform(Infinity, Infinity, Infinity, 0, 0, 0);
+ctx.transform(Infinity, Infinity, Infinity, Infinity, 0, 0);
+ctx.transform(Infinity, Infinity, Infinity, Infinity, Infinity, 0);
+ctx.transform(Infinity, Infinity, Infinity, Infinity, Infinity, Infinity);
+ctx.transform(Infinity, Infinity, Infinity, Infinity, 0, Infinity);
+ctx.transform(Infinity, Infinity, Infinity, 0, Infinity, 0);
+ctx.transform(Infinity, Infinity, Infinity, 0, Infinity, Infinity);
+ctx.transform(Infinity, Infinity, Infinity, 0, 0, Infinity);
+ctx.transform(Infinity, Infinity, 0, Infinity, 0, 0);
+ctx.transform(Infinity, Infinity, 0, Infinity, Infinity, 0);
+ctx.transform(Infinity, Infinity, 0, Infinity, Infinity, Infinity);
+ctx.transform(Infinity, Infinity, 0, Infinity, 0, Infinity);
+ctx.transform(Infinity, Infinity, 0, 0, Infinity, 0);
+ctx.transform(Infinity, Infinity, 0, 0, Infinity, Infinity);
+ctx.transform(Infinity, Infinity, 0, 0, 0, Infinity);
+ctx.transform(Infinity, 0, Infinity, 0, 0, 0);
+ctx.transform(Infinity, 0, Infinity, Infinity, 0, 0);
+ctx.transform(Infinity, 0, Infinity, Infinity, Infinity, 0);
+ctx.transform(Infinity, 0, Infinity, Infinity, Infinity, Infinity);
+ctx.transform(Infinity, 0, Infinity, Infinity, 0, Infinity);
+ctx.transform(Infinity, 0, Infinity, 0, Infinity, 0);
+ctx.transform(Infinity, 0, Infinity, 0, Infinity, Infinity);
+ctx.transform(Infinity, 0, Infinity, 0, 0, Infinity);
+ctx.transform(Infinity, 0, 0, Infinity, 0, 0);
+ctx.transform(Infinity, 0, 0, Infinity, Infinity, 0);
+ctx.transform(Infinity, 0, 0, Infinity, Infinity, Infinity);
+ctx.transform(Infinity, 0, 0, Infinity, 0, Infinity);
+ctx.transform(Infinity, 0, 0, 0, Infinity, 0);
+ctx.transform(Infinity, 0, 0, 0, Infinity, Infinity);
+ctx.transform(Infinity, 0, 0, 0, 0, Infinity);
+ctx.transform(0, Infinity, Infinity, 0, 0, 0);
+ctx.transform(0, Infinity, Infinity, Infinity, 0, 0);
+ctx.transform(0, Infinity, Infinity, Infinity, Infinity, 0);
+ctx.transform(0, Infinity, Infinity, Infinity, Infinity, Infinity);
+ctx.transform(0, Infinity, Infinity, Infinity, 0, Infinity);
+ctx.transform(0, Infinity, Infinity, 0, Infinity, 0);
+ctx.transform(0, Infinity, Infinity, 0, Infinity, Infinity);
+ctx.transform(0, Infinity, Infinity, 0, 0, Infinity);
+ctx.transform(0, Infinity, 0, Infinity, 0, 0);
+ctx.transform(0, Infinity, 0, Infinity, Infinity, 0);
+ctx.transform(0, Infinity, 0, Infinity, Infinity, Infinity);
+ctx.transform(0, Infinity, 0, Infinity, 0, Infinity);
+ctx.transform(0, Infinity, 0, 0, Infinity, 0);
+ctx.transform(0, Infinity, 0, 0, Infinity, Infinity);
+ctx.transform(0, Infinity, 0, 0, 0, Infinity);
+ctx.transform(0, 0, Infinity, Infinity, 0, 0);
+ctx.transform(0, 0, Infinity, Infinity, Infinity, 0);
+ctx.transform(0, 0, Infinity, Infinity, Infinity, Infinity);
+ctx.transform(0, 0, Infinity, Infinity, 0, Infinity);
+ctx.transform(0, 0, Infinity, 0, Infinity, 0);
+ctx.transform(0, 0, Infinity, 0, Infinity, Infinity);
+ctx.transform(0, 0, Infinity, 0, 0, Infinity);
+ctx.transform(0, 0, 0, Infinity, Infinity, 0);
+ctx.transform(0, 0, 0, Infinity, Infinity, Infinity);
+ctx.transform(0, 0, 0, Infinity, 0, Infinity);
+ctx.transform(0, 0, 0, 0, Infinity, Infinity);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(-100, -10, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.transform.nonfinite.worker.js b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.transform.nonfinite.worker.js
new file mode 100644
index 0000000000..d596fc9744
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.transform.nonfinite.worker.js
@@ -0,0 +1,103 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.transformation.transform.nonfinite
+// Description:transform() with Infinity/NaN is ignored
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("transform() with Infinity/NaN is ignored");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.translate(100, 10);
+ctx.transform(Infinity, 0, 0, 0, 0, 0);
+ctx.transform(-Infinity, 0, 0, 0, 0, 0);
+ctx.transform(NaN, 0, 0, 0, 0, 0);
+ctx.transform(0, Infinity, 0, 0, 0, 0);
+ctx.transform(0, -Infinity, 0, 0, 0, 0);
+ctx.transform(0, NaN, 0, 0, 0, 0);
+ctx.transform(0, 0, Infinity, 0, 0, 0);
+ctx.transform(0, 0, -Infinity, 0, 0, 0);
+ctx.transform(0, 0, NaN, 0, 0, 0);
+ctx.transform(0, 0, 0, Infinity, 0, 0);
+ctx.transform(0, 0, 0, -Infinity, 0, 0);
+ctx.transform(0, 0, 0, NaN, 0, 0);
+ctx.transform(0, 0, 0, 0, Infinity, 0);
+ctx.transform(0, 0, 0, 0, -Infinity, 0);
+ctx.transform(0, 0, 0, 0, NaN, 0);
+ctx.transform(0, 0, 0, 0, 0, Infinity);
+ctx.transform(0, 0, 0, 0, 0, -Infinity);
+ctx.transform(0, 0, 0, 0, 0, NaN);
+ctx.transform(Infinity, Infinity, 0, 0, 0, 0);
+ctx.transform(Infinity, Infinity, Infinity, 0, 0, 0);
+ctx.transform(Infinity, Infinity, Infinity, Infinity, 0, 0);
+ctx.transform(Infinity, Infinity, Infinity, Infinity, Infinity, 0);
+ctx.transform(Infinity, Infinity, Infinity, Infinity, Infinity, Infinity);
+ctx.transform(Infinity, Infinity, Infinity, Infinity, 0, Infinity);
+ctx.transform(Infinity, Infinity, Infinity, 0, Infinity, 0);
+ctx.transform(Infinity, Infinity, Infinity, 0, Infinity, Infinity);
+ctx.transform(Infinity, Infinity, Infinity, 0, 0, Infinity);
+ctx.transform(Infinity, Infinity, 0, Infinity, 0, 0);
+ctx.transform(Infinity, Infinity, 0, Infinity, Infinity, 0);
+ctx.transform(Infinity, Infinity, 0, Infinity, Infinity, Infinity);
+ctx.transform(Infinity, Infinity, 0, Infinity, 0, Infinity);
+ctx.transform(Infinity, Infinity, 0, 0, Infinity, 0);
+ctx.transform(Infinity, Infinity, 0, 0, Infinity, Infinity);
+ctx.transform(Infinity, Infinity, 0, 0, 0, Infinity);
+ctx.transform(Infinity, 0, Infinity, 0, 0, 0);
+ctx.transform(Infinity, 0, Infinity, Infinity, 0, 0);
+ctx.transform(Infinity, 0, Infinity, Infinity, Infinity, 0);
+ctx.transform(Infinity, 0, Infinity, Infinity, Infinity, Infinity);
+ctx.transform(Infinity, 0, Infinity, Infinity, 0, Infinity);
+ctx.transform(Infinity, 0, Infinity, 0, Infinity, 0);
+ctx.transform(Infinity, 0, Infinity, 0, Infinity, Infinity);
+ctx.transform(Infinity, 0, Infinity, 0, 0, Infinity);
+ctx.transform(Infinity, 0, 0, Infinity, 0, 0);
+ctx.transform(Infinity, 0, 0, Infinity, Infinity, 0);
+ctx.transform(Infinity, 0, 0, Infinity, Infinity, Infinity);
+ctx.transform(Infinity, 0, 0, Infinity, 0, Infinity);
+ctx.transform(Infinity, 0, 0, 0, Infinity, 0);
+ctx.transform(Infinity, 0, 0, 0, Infinity, Infinity);
+ctx.transform(Infinity, 0, 0, 0, 0, Infinity);
+ctx.transform(0, Infinity, Infinity, 0, 0, 0);
+ctx.transform(0, Infinity, Infinity, Infinity, 0, 0);
+ctx.transform(0, Infinity, Infinity, Infinity, Infinity, 0);
+ctx.transform(0, Infinity, Infinity, Infinity, Infinity, Infinity);
+ctx.transform(0, Infinity, Infinity, Infinity, 0, Infinity);
+ctx.transform(0, Infinity, Infinity, 0, Infinity, 0);
+ctx.transform(0, Infinity, Infinity, 0, Infinity, Infinity);
+ctx.transform(0, Infinity, Infinity, 0, 0, Infinity);
+ctx.transform(0, Infinity, 0, Infinity, 0, 0);
+ctx.transform(0, Infinity, 0, Infinity, Infinity, 0);
+ctx.transform(0, Infinity, 0, Infinity, Infinity, Infinity);
+ctx.transform(0, Infinity, 0, Infinity, 0, Infinity);
+ctx.transform(0, Infinity, 0, 0, Infinity, 0);
+ctx.transform(0, Infinity, 0, 0, Infinity, Infinity);
+ctx.transform(0, Infinity, 0, 0, 0, Infinity);
+ctx.transform(0, 0, Infinity, Infinity, 0, 0);
+ctx.transform(0, 0, Infinity, Infinity, Infinity, 0);
+ctx.transform(0, 0, Infinity, Infinity, Infinity, Infinity);
+ctx.transform(0, 0, Infinity, Infinity, 0, Infinity);
+ctx.transform(0, 0, Infinity, 0, Infinity, 0);
+ctx.transform(0, 0, Infinity, 0, Infinity, Infinity);
+ctx.transform(0, 0, Infinity, 0, 0, Infinity);
+ctx.transform(0, 0, 0, Infinity, Infinity, 0);
+ctx.transform(0, 0, 0, Infinity, Infinity, Infinity);
+ctx.transform(0, 0, 0, Infinity, 0, Infinity);
+ctx.transform(0, 0, 0, 0, Infinity, Infinity);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(-100, -10, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.transform.skewed.html b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.transform.skewed.html
new file mode 100644
index 0000000000..78e1252c67
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.transform.skewed.html
@@ -0,0 +1,54 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.transformation.transform.skewed</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.transformation.transform.skewed</h1>
+<p class="desc">transform() with skewy matrix transforms correctly</p>
+
+
+<script>
+var t = async_test("transform() with skewy matrix transforms correctly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+// Create green with a red square ring inside it
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.fillRect(20, 10, 60, 30);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(40, 20, 20, 10);
+// Draw a skewed shape to fill that gap, to make sure it is aligned correctly
+ctx.transform(1,4, 2,3, 5,6);
+// Post-transform coordinates:
+// [[20,10],[80,10],[80,40],[20,40],[20,10],[40,20],[40,30],[60,30],[60,20],[40,20],[20,10]];
+// Hence pre-transform coordinates:
+var pts=[[-7.4,11.2],[-43.4,59.2],[-31.4,53.2],[4.6,5.2],[-7.4,11.2],
+ [-15.4,25.2],[-11.4,23.2],[-23.4,39.2],[-27.4,41.2],[-15.4,25.2],
+ [-7.4,11.2]];
+ctx.beginPath();
+ctx.moveTo(pts[0][0], pts[0][1]);
+for (var i = 0; i < pts.length; ++i)
+ ctx.lineTo(pts[i][0], pts[i][1]);
+ctx.fill();
+_assertPixel(canvas, 21,11, 0,255,0,255);
+_assertPixel(canvas, 79,11, 0,255,0,255);
+_assertPixel(canvas, 21,39, 0,255,0,255);
+_assertPixel(canvas, 79,39, 0,255,0,255);
+_assertPixel(canvas, 39,19, 0,255,0,255);
+_assertPixel(canvas, 61,19, 0,255,0,255);
+_assertPixel(canvas, 39,31, 0,255,0,255);
+_assertPixel(canvas, 61,31, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.transform.skewed.worker.js b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.transform.skewed.worker.js
new file mode 100644
index 0000000000..46416bb957
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.transform.skewed.worker.js
@@ -0,0 +1,50 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.transformation.transform.skewed
+// Description:transform() with skewy matrix transforms correctly
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("transform() with skewy matrix transforms correctly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+// Create green with a red square ring inside it
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.fillRect(20, 10, 60, 30);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(40, 20, 20, 10);
+// Draw a skewed shape to fill that gap, to make sure it is aligned correctly
+ctx.transform(1,4, 2,3, 5,6);
+// Post-transform coordinates:
+// [[20,10],[80,10],[80,40],[20,40],[20,10],[40,20],[40,30],[60,30],[60,20],[40,20],[20,10]];
+// Hence pre-transform coordinates:
+var pts=[[-7.4,11.2],[-43.4,59.2],[-31.4,53.2],[4.6,5.2],[-7.4,11.2],
+ [-15.4,25.2],[-11.4,23.2],[-23.4,39.2],[-27.4,41.2],[-15.4,25.2],
+ [-7.4,11.2]];
+ctx.beginPath();
+ctx.moveTo(pts[0][0], pts[0][1]);
+for (var i = 0; i < pts.length; ++i)
+ ctx.lineTo(pts[i][0], pts[i][1]);
+ctx.fill();
+_assertPixel(canvas, 21,11, 0,255,0,255);
+_assertPixel(canvas, 79,11, 0,255,0,255);
+_assertPixel(canvas, 21,39, 0,255,0,255);
+_assertPixel(canvas, 79,39, 0,255,0,255);
+_assertPixel(canvas, 39,19, 0,255,0,255);
+_assertPixel(canvas, 61,19, 0,255,0,255);
+_assertPixel(canvas, 39,31, 0,255,0,255);
+_assertPixel(canvas, 61,31, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.translate.basic.html b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.translate.basic.html
new file mode 100644
index 0000000000..8144ab0cc1
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.translate.basic.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.transformation.translate.basic</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.transformation.translate.basic</h1>
+<p class="desc">translate() works</p>
+
+
+<script>
+var t = async_test("translate() works");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.translate(100, 50);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(-100, -50, 100, 50);
+_assertPixel(canvas, 90,40, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.translate.basic.worker.js b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.translate.basic.worker.js
new file mode 100644
index 0000000000..695aff37da
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.translate.basic.worker.js
@@ -0,0 +1,28 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.transformation.translate.basic
+// Description:translate() works
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("translate() works");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.translate(100, 50);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(-100, -50, 100, 50);
+_assertPixel(canvas, 90,40, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.translate.nonfinite.html b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.translate.nonfinite.html
new file mode 100644
index 0000000000..4127a7a157
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.translate.nonfinite.html
@@ -0,0 +1,39 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.transformation.translate.nonfinite</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.transformation.translate.nonfinite</h1>
+<p class="desc">translate() with Infinity/NaN is ignored</p>
+
+
+<script>
+var t = async_test("translate() with Infinity/NaN is ignored");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.translate(100, 10);
+ctx.translate(Infinity, 0.1);
+ctx.translate(-Infinity, 0.1);
+ctx.translate(NaN, 0.1);
+ctx.translate(0.1, Infinity);
+ctx.translate(0.1, -Infinity);
+ctx.translate(0.1, NaN);
+ctx.translate(Infinity, Infinity);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(-100, -10, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.translate.nonfinite.worker.js b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.translate.nonfinite.worker.js
new file mode 100644
index 0000000000..84b52a203b
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.translate.nonfinite.worker.js
@@ -0,0 +1,35 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.transformation.translate.nonfinite
+// Description:translate() with Infinity/NaN is ignored
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("translate() with Infinity/NaN is ignored");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.translate(100, 10);
+ctx.translate(Infinity, 0.1);
+ctx.translate(-Infinity, 0.1);
+ctx.translate(NaN, 0.1);
+ctx.translate(0.1, Infinity);
+ctx.translate(0.1, -Infinity);
+ctx.translate(0.1, NaN);
+ctx.translate(Infinity, Infinity);
+ctx.fillStyle = '#0f0';
+ctx.fillRect(-100, -10, 100, 50);
+_assertPixel(canvas, 50,25, 0,255,0,255);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/wide-gamut-canvas/2d.color.space.p3.to.p3.html b/testing/web-platform/tests/html/canvas/offscreen/wide-gamut-canvas/2d.color.space.p3.to.p3.html
new file mode 100644
index 0000000000..fd8385bbf7
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/wide-gamut-canvas/2d.color.space.p3.to.p3.html
@@ -0,0 +1,39 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.color.space.p3.to.p3</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.color.space.p3.to.p3</h1>
+<p class="desc">test getImageData with display-p3 and uint8 from display p3 uint8 canvas</p>
+
+
+<script>
+var t = async_test("test getImageData with display-p3 and uint8 from display p3 uint8 canvas");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d', {colorSpace: "display-p3"});
+
+var color_style = 'rgb(50, 100, 150)';
+// [0.24304, 0.38818, 0.57227, 1.0] * 255 = [62, 99, 146, 255]
+var pixel_expected = [62, 99, 146, 255];
+var epsilon = 2;
+ctx.fillStyle = color_style;
+ctx.fillRect(0, 0, 10, 10);
+
+var pixel = ctx.getImageData(5, 5, 1, 1, {colorSpace: "display-p3", storageFormat: "uint8"}).data;
+_assertSame(pixel.length, pixel_expected.length, "pixel.length", "pixel_expected.length");
+assert_approx_equals(pixel[0], pixel_expected[0], 2);
+assert_approx_equals(pixel[1], pixel_expected[1], 2);
+assert_approx_equals(pixel[2], pixel_expected[2], 2);
+assert_approx_equals(pixel[3], pixel_expected[3], 2);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/wide-gamut-canvas/2d.color.space.p3.to.p3.worker.js b/testing/web-platform/tests/html/canvas/offscreen/wide-gamut-canvas/2d.color.space.p3.to.p3.worker.js
new file mode 100644
index 0000000000..c5242daab6
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/wide-gamut-canvas/2d.color.space.p3.to.p3.worker.js
@@ -0,0 +1,35 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.color.space.p3.to.p3
+// Description:test getImageData with display-p3 and uint8 from display p3 uint8 canvas
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("test getImageData with display-p3 and uint8 from display p3 uint8 canvas");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d', {colorSpace: "display-p3"});
+
+var color_style = 'rgb(50, 100, 150)';
+// [0.24304, 0.38818, 0.57227, 1.0] * 255 = [62, 99, 146, 255]
+var pixel_expected = [62, 99, 146, 255];
+var epsilon = 2;
+ctx.fillStyle = color_style;
+ctx.fillRect(0, 0, 10, 10);
+
+var pixel = ctx.getImageData(5, 5, 1, 1, {colorSpace: "display-p3", storageFormat: "uint8"}).data;
+_assertSame(pixel.length, pixel_expected.length, "pixel.length", "pixel_expected.length");
+assert_approx_equals(pixel[0], pixel_expected[0], 2);
+assert_approx_equals(pixel[1], pixel_expected[1], 2);
+assert_approx_equals(pixel[2], pixel_expected[2], 2);
+assert_approx_equals(pixel[3], pixel_expected[3], 2);
+t.done();
+
+});
+done();
diff --git a/testing/web-platform/tests/html/canvas/offscreen/wide-gamut-canvas/2d.color.space.p3.to.srgb.html b/testing/web-platform/tests/html/canvas/offscreen/wide-gamut-canvas/2d.color.space.p3.to.srgb.html
new file mode 100644
index 0000000000..56d771b666
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/wide-gamut-canvas/2d.color.space.p3.to.srgb.html
@@ -0,0 +1,38 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.color.space.p3.to.srgb</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.color.space.p3.to.srgb</h1>
+<p class="desc">test getImageData with srsb and uint8 from display p3 uint8 canvas</p>
+
+
+<script>
+var t = async_test("test getImageData with srsb and uint8 from display p3 uint8 canvas");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d', {colorSpace: "display-p3"});
+
+var color_style = 'rgb(50, 100, 150)';
+var pixel_expected = [50, 100, 150, 255];
+var epsilon = 2;
+ctx.fillStyle = color_style;
+ctx.fillRect(0, 0, 10, 10);
+
+var pixel = ctx.getImageData(5, 5, 1, 1, {colorSpace: "srgb", storageFormat: "uint8"}).data;
+_assertSame(pixel.length, pixel_expected.length, "pixel.length", "pixel_expected.length");
+assert_approx_equals(pixel[0], pixel_expected[0], 2);
+assert_approx_equals(pixel[1], pixel_expected[1], 2);
+assert_approx_equals(pixel[2], pixel_expected[2], 2);
+assert_approx_equals(pixel[3], pixel_expected[3], 2);
+t.done();
+
+});
+</script>
diff --git a/testing/web-platform/tests/html/canvas/offscreen/wide-gamut-canvas/2d.color.space.p3.to.srgb.worker.js b/testing/web-platform/tests/html/canvas/offscreen/wide-gamut-canvas/2d.color.space.p3.to.srgb.worker.js
new file mode 100644
index 0000000000..3f8fb4b289
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/wide-gamut-canvas/2d.color.space.p3.to.srgb.worker.js
@@ -0,0 +1,34 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.color.space.p3.to.srgb
+// Description:test getImageData with srsb and uint8 from display p3 uint8 canvas
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("test getImageData with srsb and uint8 from display p3 uint8 canvas");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+var canvas = new OffscreenCanvas(100, 50);
+var ctx = canvas.getContext('2d', {colorSpace: "display-p3"});
+
+var color_style = 'rgb(50, 100, 150)';
+var pixel_expected = [50, 100, 150, 255];
+var epsilon = 2;
+ctx.fillStyle = color_style;
+ctx.fillRect(0, 0, 10, 10);
+
+var pixel = ctx.getImageData(5, 5, 1, 1, {colorSpace: "srgb", storageFormat: "uint8"}).data;
+_assertSame(pixel.length, pixel_expected.length, "pixel.length", "pixel_expected.length");
+assert_approx_equals(pixel[0], pixel_expected[0], 2);
+assert_approx_equals(pixel[1], pixel_expected[1], 2);
+assert_approx_equals(pixel[2], pixel_expected[2], 2);
+assert_approx_equals(pixel[3], pixel_expected[3], 2);
+t.done();
+
+});
+done();