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-rw-r--r--testing/web-platform/tests/imagebitmap-renderingcontext/META.yml6
-rw-r--r--testing/web-platform/tests/imagebitmap-renderingcontext/bitmaprenderer-as-imagesource.html90
-rw-r--r--testing/web-platform/tests/imagebitmap-renderingcontext/context-creation-offscreen-with-alpha.html62
-rw-r--r--testing/web-platform/tests/imagebitmap-renderingcontext/context-creation-offscreen.html18
-rw-r--r--testing/web-platform/tests/imagebitmap-renderingcontext/context-creation-with-alpha.html64
-rw-r--r--testing/web-platform/tests/imagebitmap-renderingcontext/context-creation.html19
-rw-r--r--testing/web-platform/tests/imagebitmap-renderingcontext/context-preserves-canvas.html22
-rw-r--r--testing/web-platform/tests/imagebitmap-renderingcontext/toBlob-origin-clean-offscreen.sub.html27
-rw-r--r--testing/web-platform/tests/imagebitmap-renderingcontext/transferFromImageBitmap-ToBlob-offscreen.html60
-rw-r--r--testing/web-platform/tests/imagebitmap-renderingcontext/transferFromImageBitmap-ToBlob-transferControlToOffscreen.html63
-rw-r--r--testing/web-platform/tests/imagebitmap-renderingcontext/transferFromImageBitmap-TransferToImageBitmap-offscreen.html56
-rw-r--r--testing/web-platform/tests/imagebitmap-renderingcontext/transferFromImageBitmap-TransferToImageBitmap-transferControlToOffscreen.html59
-rw-r--r--testing/web-platform/tests/imagebitmap-renderingcontext/transferFromImageBitmap-detached.html34
-rw-r--r--testing/web-platform/tests/imagebitmap-renderingcontext/transferFromImageBitmap-null-offscreen.html63
-rw-r--r--testing/web-platform/tests/imagebitmap-renderingcontext/transferFromImageBitmap-null.html65
15 files changed, 708 insertions, 0 deletions
diff --git a/testing/web-platform/tests/imagebitmap-renderingcontext/META.yml b/testing/web-platform/tests/imagebitmap-renderingcontext/META.yml
new file mode 100644
index 0000000000..4239a85f5e
--- /dev/null
+++ b/testing/web-platform/tests/imagebitmap-renderingcontext/META.yml
@@ -0,0 +1,6 @@
+spec: https://html.spec.whatwg.org/multipage/canvas.html#the-imagebitmap-rendering-context
+suggested_reviewers:
+ - AmeliaBR
+ - annevk
+ - kenrussell
+ - fserb
diff --git a/testing/web-platform/tests/imagebitmap-renderingcontext/bitmaprenderer-as-imagesource.html b/testing/web-platform/tests/imagebitmap-renderingcontext/bitmaprenderer-as-imagesource.html
new file mode 100644
index 0000000000..21c5ea48ad
--- /dev/null
+++ b/testing/web-platform/tests/imagebitmap-renderingcontext/bitmaprenderer-as-imagesource.html
@@ -0,0 +1,90 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>Canvas's ImageBitmapRenderingContext test</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<link rel="help" href="https://html.spec.whatwg.org/multipage/scripting.html#the-imagebitmap-rendering-context">
+<script>
+var width = 10;
+var height = 10;
+
+function testCanvas(ctx, x, y, r, g, b, a)
+{
+ var color = ctx.getImageData(x, y, 1, 1).data;
+ assert_array_equals(color, [r, g, b, a]);
+}
+
+function consumeImageBitmap(image, t)
+{
+ var myCanvas = document.createElement('canvas');
+ myCanvas.width = myCanvas.height = 20;
+ var myCtx = myCanvas.getContext('bitmaprenderer');
+ myCtx.transferFromImageBitmap(image);
+
+ createImageBitmap(myCanvas).then(t.step_func_done(function(imageBitmap) {
+ // Per spec, when transferFromImageBitmap happens, the transferred
+ // ImageBitmap (|image| here) must determine the intrinsic size of
+ // myCanvas, and hence myCanvas.width/height is ignored. Therefore,
+ // |imageBitmap| should have the same size as the |image|.
+ assert_equals(imageBitmap.width, width);
+ assert_equals(imageBitmap.height, height);
+
+ var dstCanvas = document.createElement('canvas');
+ dstCanvas.width = dstCanvas.height = 20;
+ var dstCtx = dstCanvas.getContext('2d');
+ dstCtx.drawImage(myCanvas, 0, 0);
+ testCanvas(dstCtx, 5, 5, 0, 255, 0, 255);
+ testCanvas(dstCtx, 15, 15, 0, 0, 0, 0);
+ }));
+}
+
+async_test(function(t) {
+ var canvas = document.createElement("canvas");
+ canvas.width = width;
+ canvas.height = height;
+ var ctx = canvas.getContext('2d');
+ ctx.fillStyle = '#0f0';
+ ctx.fillRect(0, 0, width, height);
+ createImageBitmap(canvas).then(t.step_func(function(image) {
+ consumeImageBitmap(image, t);
+ }));
+}, 'Test that createImageBitmap from a bitmaprenderer canvas produces correct result');
+
+async_test(function(t) {
+ var canvas = document.createElement("canvas");
+ canvas.width = width;
+ canvas.height = height;
+ var ctx = canvas.getContext('bitmaprenderer');
+ createImageBitmap(canvas).then(t.step_func_done(function(image) {
+ assert_equals(image.width, width);
+ assert_equals(image.height, height);
+
+ var dstCanvas = document.createElement('canvas');
+ dstCanvas.width = width;
+ dstCanvas.height = height;
+ var dstCtx = dstCanvas.getContext('2d');
+ dstCtx.drawImage(canvas, 0, 0);
+ testCanvas(dstCtx, 5, 5, 0, 0, 0, 0);
+ }));
+}, 'Test that createImageBitmap on a bitmaprenderer canvas that never consumes any source produces correct result');
+
+
+async_test(function(t) {
+ var canvas = document.createElement("canvas");
+ canvas.width = width;
+ canvas.height = height;
+ var ctx = canvas.getContext('bitmaprenderer');
+ ctx.transferFromImageBitmap(null);
+ createImageBitmap(canvas).then(t.step_func_done(function(image) {
+ assert_equals(image.width, width);
+ assert_equals(image.height, height);
+
+ var dstCanvas = document.createElement('canvas');
+ dstCanvas.width = width;
+ dstCanvas.height = height;
+ var dstCtx = dstCanvas.getContext('2d');
+ dstCtx.drawImage(canvas, 0, 0);
+ testCanvas(dstCtx, 5, 5, 0, 0, 0, 0);
+ }));
+}, 'Test that createImageBitmap on a bitmaprenderer canvas that consumes null produces correct result');
+</script>
diff --git a/testing/web-platform/tests/imagebitmap-renderingcontext/context-creation-offscreen-with-alpha.html b/testing/web-platform/tests/imagebitmap-renderingcontext/context-creation-offscreen-with-alpha.html
new file mode 100644
index 0000000000..b565def964
--- /dev/null
+++ b/testing/web-platform/tests/imagebitmap-renderingcontext/context-creation-offscreen-with-alpha.html
@@ -0,0 +1,62 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>Canvas's ImageBitmapRenderingContext test</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<link rel="help" href="https://html.spec.whatwg.org/multipage/scripting.html#the-imagebitmap-rendering-context">
+<script>
+var width = 10;
+var height = 10;
+
+function testImageBitmap(image, opts, expectedR, expectedG, expectedB, expectedA)
+{
+ var dstCanvas = new OffscreenCanvas(width,height);
+ var dstCtx = dstCanvas.getContext('bitmaprenderer', opts);
+ dstCtx.transferFromImageBitmap(image);
+
+ var myCanvas = document.createElement('canvas');
+ myCanvas.width = width;
+ myCanvas.height = height;
+ var myCtx = myCanvas.getContext('2d');
+ myCtx.drawImage(dstCanvas, 0, 0);
+ var color = myCtx.getImageData(5, 5, 1, 1).data;
+ assert_array_approx_equals(color, [expectedR, expectedG, expectedB, expectedA],1);
+}
+
+promise_test(function() {
+ var srcCanvas = document.createElement('canvas');
+ srcCanvas.width = width;
+ srcCanvas.height = height;
+ var ctx = srcCanvas.getContext('2d');
+ ctx.fillStyle = 'rgba(0, 255, 0, 0.5)';
+ ctx.fillRect(0, 0, width, height);
+ return createImageBitmap(srcCanvas).then(function(image) {
+ testImageBitmap(image, {alpha: false}, 0, 255, 0, 128);
+ });
+}, "Test that an ImageBitmapRenderingContext with alpha disabled makes the canvas opaque");
+
+promise_test(function() {
+ var srcCanvas = document.createElement('canvas');
+ srcCanvas.width = width;
+ srcCanvas.height = height;
+ var ctx = srcCanvas.getContext('2d');
+ ctx.fillStyle = 'rgba(0, 255, 0, 0.5)';
+ ctx.fillRect(0, 0, width, height);
+ return createImageBitmap(srcCanvas).then(function(image) {
+ testImageBitmap(image, {alpha: true}, 0, 255, 0, 128);
+ });
+}, "Test that an ImageBitmapRenderingContext with alpha enabled preserves the alpha");
+
+promise_test(function() {
+ var srcCanvas = document.createElement('canvas');
+ srcCanvas.width = width;
+ srcCanvas.height = height;
+ var ctx = srcCanvas.getContext('2d');
+ ctx.fillStyle = 'rgba(0, 255, 0, 0.5)';
+ ctx.fillRect(0, 0, width, height);
+ return createImageBitmap(srcCanvas).then(function(image) {
+ testImageBitmap(image, {}, 0, 255, 0, 128);
+ });
+}, "Test that the 'alpha' context creation attribute is true by default");
+
+</script>
diff --git a/testing/web-platform/tests/imagebitmap-renderingcontext/context-creation-offscreen.html b/testing/web-platform/tests/imagebitmap-renderingcontext/context-creation-offscreen.html
new file mode 100644
index 0000000000..66d4cce420
--- /dev/null
+++ b/testing/web-platform/tests/imagebitmap-renderingcontext/context-creation-offscreen.html
@@ -0,0 +1,18 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>Canvas's ImageBitmapRenderingContext test</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+ <link rel="help" href="https://html.spec.whatwg.org/multipage/canvas.html#the-imagebitmap-rendering-context">
+<script>
+test(function() {
+ var width = 10;
+ var height = 10;
+ var canvas = new OffscreenCanvas(width, height);
+ var ctx = canvas.getContext('bitmaprenderer');
+ assert_true(ctx instanceof ImageBitmapRenderingContext);
+ assert_true("canvas" in ctx);
+ assert_equals(canvas, ctx.canvas);
+}, "Test that canvas.getContext('bitmaprenderer') returns an instance of ImageBitmapRenderingContext and ctx.canvas on a ImageBitmapRenderingContext returns the original OffscreenCanvas");
+
+</script>
diff --git a/testing/web-platform/tests/imagebitmap-renderingcontext/context-creation-with-alpha.html b/testing/web-platform/tests/imagebitmap-renderingcontext/context-creation-with-alpha.html
new file mode 100644
index 0000000000..2c8fa08b9d
--- /dev/null
+++ b/testing/web-platform/tests/imagebitmap-renderingcontext/context-creation-with-alpha.html
@@ -0,0 +1,64 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>Canvas's ImageBitmapRenderingContext test</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<link rel="help" href="https://html.spec.whatwg.org/multipage/scripting.html#the-imagebitmap-rendering-context">
+<script>
+var width = 10;
+var height = 10;
+
+function testImageBitmap(image, opts, expectedR, expectedG, expectedB, expectedA)
+{
+ var dstCanvas = document.createElement('canvas');
+ dstCanvas.width = width;
+ dstCanvas.height = height;
+ var dstCtx = dstCanvas.getContext('bitmaprenderer', opts);
+ dstCtx.transferFromImageBitmap(image);
+
+ var myCanvas = document.createElement('canvas');
+ myCanvas.width = width;
+ myCanvas.height = height;
+ var myCtx = myCanvas.getContext('2d');
+ myCtx.drawImage(dstCanvas, 0, 0);
+ var color = myCtx.getImageData(5, 5, 1, 1).data;
+ assert_array_approx_equals(color, [expectedR, expectedG, expectedB, expectedA],1);
+}
+
+promise_test(function() {
+ var srcCanvas = document.createElement('canvas');
+ srcCanvas.width = width;
+ srcCanvas.height = height;
+ var ctx = srcCanvas.getContext('2d');
+ ctx.fillStyle = 'rgba(0, 255, 0, 0.5)';
+ ctx.fillRect(0, 0, width, height);
+ return createImageBitmap(srcCanvas).then(function(image) {
+ testImageBitmap(image, {alpha: false}, 0, 255, 0, 128);
+ });
+}, "Test that an ImageBitmapRenderingContext with alpha disabled makes the canvas opaque");
+
+promise_test(function() {
+ var srcCanvas = document.createElement('canvas');
+ srcCanvas.width = width;
+ srcCanvas.height = height;
+ var ctx = srcCanvas.getContext('2d');
+ ctx.fillStyle = 'rgba(0, 255, 0, 0.5)';
+ ctx.fillRect(0, 0, width, height);
+ return createImageBitmap(srcCanvas).then(function(image) {
+ testImageBitmap(image, {alpha: true}, 0, 255, 0, 128);
+ });
+}, "Test that an ImageBitmapRenderingContext with alpha enabled preserves the alpha");
+
+promise_test(function() {
+ var srcCanvas = document.createElement('canvas');
+ srcCanvas.width = width;
+ srcCanvas.height = height;
+ var ctx = srcCanvas.getContext('2d');
+ ctx.fillStyle = 'rgba(0, 255, 0, 0.5)';
+ ctx.fillRect(0, 0, width, height);
+ return createImageBitmap(srcCanvas).then(function(image) {
+ testImageBitmap(image, {}, 0, 255, 0, 128);
+ });
+}, "Test that the 'alpha' context creation attribute is true by default");
+
+</script>
diff --git a/testing/web-platform/tests/imagebitmap-renderingcontext/context-creation.html b/testing/web-platform/tests/imagebitmap-renderingcontext/context-creation.html
new file mode 100644
index 0000000000..3daa397789
--- /dev/null
+++ b/testing/web-platform/tests/imagebitmap-renderingcontext/context-creation.html
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>Canvas's ImageBitmapRenderingContext test</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<link rel="help" href="https://html.spec.whatwg.org/multipage/scripting.html#the-imagebitmap-rendering-context">
+<script>
+var width = 10;
+var height = 10;
+
+test(function() {
+ var canvas = document.createElement("canvas");
+ canvas.width = width;
+ canvas.height = height;
+ var ctx = canvas.getContext('bitmaprenderer');
+ assert_true(ctx instanceof ImageBitmapRenderingContext);
+}, "Test that canvas.getContext('bitmaprenderer') returns an instance of ImageBitmapRenderingContext");
+
+</script>
diff --git a/testing/web-platform/tests/imagebitmap-renderingcontext/context-preserves-canvas.html b/testing/web-platform/tests/imagebitmap-renderingcontext/context-preserves-canvas.html
new file mode 100644
index 0000000000..b0753a7348
--- /dev/null
+++ b/testing/web-platform/tests/imagebitmap-renderingcontext/context-preserves-canvas.html
@@ -0,0 +1,22 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>Canvas's ImageBitmapRenderingContext test</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<link rel="help" href="https://html.spec.whatwg.org/multipage/canvas.html#the-imagebitmap-rendering-context">
+<script>
+test(function() {
+ var width = 10;
+ var height = 10;
+ var canvas = document.createElement("canvas");
+ canvas.width = width;
+ canvas.height = height;
+ var ctx = canvas.getContext('bitmaprenderer');
+ var dstCanvas = ctx.canvas;
+ assert_true("canvas" in ctx);
+ assert_equals(dstCanvas, ctx.canvas);
+ assert_equals(canvas, ctx.canvas);
+ assert_equals(dstCanvas.width, width);
+ assert_equals(dstCanvas.height, height);
+}, "Test that ctx.canvas on a ImageBitmapRenderingContext returns the original canvas");
+</script>
diff --git a/testing/web-platform/tests/imagebitmap-renderingcontext/toBlob-origin-clean-offscreen.sub.html b/testing/web-platform/tests/imagebitmap-renderingcontext/toBlob-origin-clean-offscreen.sub.html
new file mode 100644
index 0000000000..0b00f92a95
--- /dev/null
+++ b/testing/web-platform/tests/imagebitmap-renderingcontext/toBlob-origin-clean-offscreen.sub.html
@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<meta charset=utf-8>
+<title>convertToBlob, OffscreenCanvas: origin-clean flag</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<link rel="help" href="https://html.spec.whatwg.org/multipage/scripting.html#the-imagebitmap-rendering-context">
+<script>
+const crossOriginImageUrl = "http://{{domains[www1]}}:{{ports[http][0]}}/images/red.png";
+
+async_test(t => {
+ var img = new Image();
+ // Use a cross-origin URL.
+ img.src = crossOriginImageUrl;
+
+ img.onload = t.step_func(e => {
+ createImageBitmap(img, 0, 0, img.width, img.height)
+ .then(t.step_func(bitmap => {
+ var canvasBitmap = new OffscreenCanvas(img.width,img.height);
+ var contextBitmap = canvasBitmap.getContext("bitmaprenderer");
+ contextBitmap.transferFromImageBitmap(bitmap);
+ promise_rejects_dom(t, 'SecurityError',
+ canvasBitmap.convertToBlob(),
+ "convertToBlob on a tainted OffscreenCanvas has to throw").then(t.step_func_done());
+ }));
+ });
+}, "Test that call convertToBlob on a tainted OffscreenCanvas throws exception");
+</script>
diff --git a/testing/web-platform/tests/imagebitmap-renderingcontext/transferFromImageBitmap-ToBlob-offscreen.html b/testing/web-platform/tests/imagebitmap-renderingcontext/transferFromImageBitmap-ToBlob-offscreen.html
new file mode 100644
index 0000000000..81d0c90065
--- /dev/null
+++ b/testing/web-platform/tests/imagebitmap-renderingcontext/transferFromImageBitmap-ToBlob-offscreen.html
@@ -0,0 +1,60 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>Canvas's ImageBitmapRenderingContext test</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<link rel="help" href="https://html.spec.whatwg.org/multipage/scripting.html#the-imagebitmap-rendering-context">
+<script>
+var width = 10;
+var height = 10;
+
+function testCanvas(ctx, r, g, b, a)
+{
+ var color = ctx.getImageData(5, 5, 1, 1).data;
+ assert_array_equals(color, [r, g, b, a]);
+}
+
+promise_test(function() {
+ function transferFromImageBitmapToBlobOffscreen(greenImage) {
+ var bitmapCanvas = new OffscreenCanvas(width,height);
+ var bitmapCtx = bitmapCanvas.getContext('bitmaprenderer');
+ bitmapCtx.transferFromImageBitmap(greenImage);
+
+ return bitmapCanvas.convertToBlob();
+ }
+
+ function drawBlobToCanvas(blob) {
+ // Make sure the bitmap renderer canvas is filled correctly.
+ var pngImage = new Image();
+ var myCanvasToTest = document.createElement('canvas');
+ myCanvasToTest.width = width;
+ myCanvasToTest.height = height;
+
+ // Wait for the blob img to load.
+ return new Promise(function(resolve) {
+ pngImage.src = URL.createObjectURL(blob);
+ pngImage.onload = function() {
+ var myCtxToTest = myCanvasToTest.getContext('2d');
+ myCtxToTest.drawImage(pngImage, 0, 0);
+ resolve(myCtxToTest);
+ };
+ });
+ }
+
+ var greenCanvas = document.createElement('canvas');
+ greenCanvas.width = width;
+ greenCanvas.height = height;
+ var greenCtx = greenCanvas.getContext('2d');
+ greenCtx.fillStyle = '#0f0';
+ greenCtx.fillRect(0, 0, width, height);
+
+ return createImageBitmap(greenCanvas).then(
+ greenImage => transferFromImageBitmapToBlobOffscreen(greenImage)
+ ).then(
+ blob => drawBlobToCanvas(blob)
+ ).then(
+ ctx => testCanvas(ctx, 0, 255, 0, 255)
+ );
+},'Test that convertToBlob works and produce the expected image');
+
+</script>
diff --git a/testing/web-platform/tests/imagebitmap-renderingcontext/transferFromImageBitmap-ToBlob-transferControlToOffscreen.html b/testing/web-platform/tests/imagebitmap-renderingcontext/transferFromImageBitmap-ToBlob-transferControlToOffscreen.html
new file mode 100644
index 0000000000..e833b63fe4
--- /dev/null
+++ b/testing/web-platform/tests/imagebitmap-renderingcontext/transferFromImageBitmap-ToBlob-transferControlToOffscreen.html
@@ -0,0 +1,63 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>Canvas's ImageBitmapRenderingContext test</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<link rel="help" href="https://html.spec.whatwg.org/multipage/scripting.html#the-imagebitmap-rendering-context">
+<script>
+var width = 10;
+var height = 10;
+
+function testCanvas(ctx, r, g, b, a)
+{
+ var color = ctx.getImageData(5, 5, 1, 1).data;
+ assert_array_equals(color, [r, g, b, a]);
+}
+
+promise_test(function() {
+ function transferFromImageBitmapToBlobOffscreen(greenImage) {
+ var bitmapCanvas = document.createElement('canvas');
+ bitmapCanvas.width = width;
+ bitmapCanvas.height = height;
+ var offscreenCanvas = bitmapCanvas.transferControlToOffscreen();
+ var bitmapCtx = offscreenCanvas.getContext('bitmaprenderer');
+ bitmapCtx.transferFromImageBitmap(greenImage);
+
+ return offscreenCanvas.convertToBlob();
+ }
+
+ function drawBlobToCanvas(blob) {
+ // Make sure the bitmap renderer canvas is filled correctly.
+ var pngImage = new Image();
+ var myCanvasToTest = document.createElement('canvas');
+ myCanvasToTest.width = width;
+ myCanvasToTest.height = height;
+
+ // Wait for the blob img to load.
+ return new Promise(function(resolve) {
+ pngImage.src = URL.createObjectURL(blob);
+ pngImage.onload = function() {
+ var myCtxToTest = myCanvasToTest.getContext('2d');
+ myCtxToTest.drawImage(pngImage, 0, 0);
+ resolve(myCtxToTest);
+ };
+ });
+ }
+
+ var greenCanvas = document.createElement('canvas');
+ greenCanvas.width = width;
+ greenCanvas.height = height;
+ var greenCtx = greenCanvas.getContext('2d');
+ greenCtx.fillStyle = '#0f0';
+ greenCtx.fillRect(0, 0, width, height);
+
+ return createImageBitmap(greenCanvas).then(
+ greenImage => transferFromImageBitmapToBlobOffscreen(greenImage)
+ ).then(
+ blob => drawBlobToCanvas(blob)
+ ).then(
+ ctx => testCanvas(ctx, 0, 255, 0, 255)
+ );
+},'Test that convertToBlob works and produce the expected image');
+
+</script>
diff --git a/testing/web-platform/tests/imagebitmap-renderingcontext/transferFromImageBitmap-TransferToImageBitmap-offscreen.html b/testing/web-platform/tests/imagebitmap-renderingcontext/transferFromImageBitmap-TransferToImageBitmap-offscreen.html
new file mode 100644
index 0000000000..7e04da63dd
--- /dev/null
+++ b/testing/web-platform/tests/imagebitmap-renderingcontext/transferFromImageBitmap-TransferToImageBitmap-offscreen.html
@@ -0,0 +1,56 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>Canvas's ImageBitmapRenderingContext test</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<link rel="help" href="https://html.spec.whatwg.org/multipage/scripting.html#the-imagebitmap-rendering-context">
+<script>
+var width = 10;
+var height = 10;
+
+function testCanvas(bitmapCanvas, r, g, b, a)
+{
+ var myCanvas = document.createElement('canvas');
+ myCanvas.width = width;
+ myCanvas.height = height;
+ var myCtx = myCanvas.getContext('2d');
+ myCtx.drawImage(bitmapCanvas, 0, 0);
+ var color = myCtx.getImageData(5, 5, 1, 1).data;
+ assert_array_equals(color, [r, g, b, a]);
+}
+
+promise_test(function() {
+ function testTransferFromImageBitmapNullability(greenImage) {
+ var bitmapCanvas = new OffscreenCanvas(width,height);
+ var bitmapCtx = bitmapCanvas.getContext('bitmaprenderer');
+ bitmapCtx.transferFromImageBitmap(greenImage);
+
+ // Make sure the bitmap renderer canvas is filled correctly.
+ var myCanvas = document.createElement('canvas');
+ var myCtx = myCanvas.getContext('bitmaprenderer');
+ myCtx.transferFromImageBitmap(bitmapCanvas.transferToImageBitmap());
+ testCanvas(myCanvas, 0, 255, 0, 255);
+
+ // Test that after transfering for second time to ImageBitmap produces
+ // a black bitmap of the same size
+ var myCanvas2 = document.createElement('canvas');
+ var myCtx2 = myCanvas2.getContext('bitmaprenderer');
+ myCtx2.transferFromImageBitmap(bitmapCanvas.transferToImageBitmap());
+ testCanvas(myCanvas2, 0, 0, 0, 0);
+ }
+
+ var greenCanvas = document.createElement('canvas');
+ greenCanvas.width = width;
+ greenCanvas.height = height;
+ var greenCtx = greenCanvas.getContext('2d');
+ greenCtx.fillStyle = '#0f0';
+ greenCtx.fillRect(0, 0, width, height);
+
+ return Promise.all([
+ createImageBitmap(greenCanvas),
+ ]).then(([greenImage]) => {
+ testTransferFromImageBitmapNullability(greenImage);
+ });
+},'Test that transferToImageBitmap works and that resets the imagebitmap to black');
+
+</script>
diff --git a/testing/web-platform/tests/imagebitmap-renderingcontext/transferFromImageBitmap-TransferToImageBitmap-transferControlToOffscreen.html b/testing/web-platform/tests/imagebitmap-renderingcontext/transferFromImageBitmap-TransferToImageBitmap-transferControlToOffscreen.html
new file mode 100644
index 0000000000..f1c95fa84e
--- /dev/null
+++ b/testing/web-platform/tests/imagebitmap-renderingcontext/transferFromImageBitmap-TransferToImageBitmap-transferControlToOffscreen.html
@@ -0,0 +1,59 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>Canvas's ImageBitmapRenderingContext test</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<link rel="help" href="https://html.spec.whatwg.org/multipage/scripting.html#the-imagebitmap-rendering-context">
+<script>
+var width = 10;
+var height = 10;
+
+function testCanvas(bitmapCanvas, r, g, b, a)
+{
+ var myCanvas = document.createElement('canvas');
+ myCanvas.width = width;
+ myCanvas.height = height;
+ var myCtx = myCanvas.getContext('2d');
+ myCtx.drawImage(bitmapCanvas, 0, 0);
+ var color = myCtx.getImageData(5, 5, 1, 1).data;
+ assert_array_equals(color, [r, g, b, a]);
+}
+
+promise_test(function() {
+ function testTransferFromImageBitmapNullability(greenImage) {
+ var bitmapCanvas = document.createElement('canvas');
+ bitmapCanvas.width = width;
+ bitmapCanvas.height = height;
+ var offscreenCanvas = bitmapCanvas.transferControlToOffscreen();
+ var bitmapCtx = offscreenCanvas.getContext('bitmaprenderer');
+ bitmapCtx.transferFromImageBitmap(greenImage);
+
+ // Make sure the bitmap renderer canvas is filled correctly.
+ var myCanvas = document.createElement('canvas');
+ var myCtx = myCanvas.getContext('bitmaprenderer');
+ myCtx.transferFromImageBitmap(offscreenCanvas.transferToImageBitmap());
+ testCanvas(myCanvas, 0, 255, 0, 255);
+
+ // Test that after transfering for second time to ImageBitmap produces
+ // a black bitmap of the same size
+ var myCanvas2 = document.createElement('canvas');
+ var myCtx2 = myCanvas2.getContext('bitmaprenderer');
+ myCtx2.transferFromImageBitmap(offscreenCanvas.transferToImageBitmap());
+ testCanvas(myCanvas2, 0, 0, 0, 0);
+ }
+
+ var greenCanvas = document.createElement('canvas');
+ greenCanvas.width = width;
+ greenCanvas.height = height;
+ var greenCtx = greenCanvas.getContext('2d');
+ greenCtx.fillStyle = '#0f0';
+ greenCtx.fillRect(0, 0, width, height);
+
+ return Promise.all([
+ createImageBitmap(greenCanvas),
+ ]).then(([greenImage]) => {
+ testTransferFromImageBitmapNullability(greenImage);
+ });
+},'Test that transferToImageBitmap works and that resets the imagebitmap to black');
+
+</script>
diff --git a/testing/web-platform/tests/imagebitmap-renderingcontext/transferFromImageBitmap-detached.html b/testing/web-platform/tests/imagebitmap-renderingcontext/transferFromImageBitmap-detached.html
new file mode 100644
index 0000000000..40bf6eeb56
--- /dev/null
+++ b/testing/web-platform/tests/imagebitmap-renderingcontext/transferFromImageBitmap-detached.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>Canvas's ImageBitmapRenderingContext test</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<link rel="help" href="https://html.spec.whatwg.org/multipage/scripting.html#the-imagebitmap-rendering-context">
+<script>
+var width = 10;
+var height = 10;
+
+promise_test(function() {
+ function testException(image) {
+ var dstCanvas = document.createElement('canvas');
+ dstCanvas.width = width;
+ dstCanvas.height = height;
+ var dstCtx = dstCanvas.getContext('bitmaprenderer');
+ dstCtx.transferFromImageBitmap(image);
+
+ // The image should be detached after transferFromImageBitmap.
+ assert_equals(image.width, 0);
+ assert_equals(image.height, 0);
+ assert_throws_dom("InvalidStateError", function() { dstCtx.transferFromImageBitmap(image); });
+ }
+
+ var srcCanvas = document.createElement('canvas');
+ srcCanvas.width = width;
+ srcCanvas.height = height;
+ var ctx = srcCanvas.getContext('2d');
+ ctx.fillStyle = 'rgba(0, 255, 0, 0.5)';
+ ctx.fillRect(0, 0, width, height);
+ return createImageBitmap(srcCanvas).then(testException);
+}, "Test transferFromImageBitmap(image) with a detached image should throw InvalidStateError");
+
+</script>
diff --git a/testing/web-platform/tests/imagebitmap-renderingcontext/transferFromImageBitmap-null-offscreen.html b/testing/web-platform/tests/imagebitmap-renderingcontext/transferFromImageBitmap-null-offscreen.html
new file mode 100644
index 0000000000..e05a623a2f
--- /dev/null
+++ b/testing/web-platform/tests/imagebitmap-renderingcontext/transferFromImageBitmap-null-offscreen.html
@@ -0,0 +1,63 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>Canvas's ImageBitmapRenderingContext test</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<link rel="help" href="https://html.spec.whatwg.org/multipage/scripting.html#the-imagebitmap-rendering-context">
+<script>
+var width = 10;
+var height = 10;
+
+function testCanvas(bitmapCanvas, r, g, b, a)
+{
+ var myCanvas = document.createElement('canvas');
+ myCanvas.width = width;
+ myCanvas.height = height;
+ var myCtx = myCanvas.getContext('2d');
+ myCtx.drawImage(bitmapCanvas, 0, 0);
+ var color = myCtx.getImageData(5, 5, 1, 1).data;
+ assert_array_equals(color, [r, g, b, a]);
+}
+
+promise_test(function() {
+ function testTransferFromImageBitmapNullability(greenImage, redImage) {
+ var bitmapCanvas = new OffscreenCanvas(width,height);
+ var bitmapCtx = bitmapCanvas.getContext('bitmaprenderer');
+ bitmapCtx.transferFromImageBitmap(greenImage);
+
+ // Make sure the bitmap renderer canvas is filled correctly.
+ testCanvas(bitmapCanvas, 0, 255, 0, 255);
+
+ // Test if passing null resets the bitmap renderer canvas.
+ // Drawing the resetted canvas cannot change the destination canvas.
+ bitmapCtx.transferFromImageBitmap(null);
+ testCanvas(bitmapCanvas, 0, 0, 0, 0);
+
+ // Test if we can redraw the bitmap canvas correctly after reset.
+ bitmapCtx.transferFromImageBitmap(redImage);
+ testCanvas(bitmapCanvas, 255, 0, 0, 255);
+ }
+
+ var greenCanvas = document.createElement('canvas');
+ greenCanvas.width = width;
+ greenCanvas.height = height;
+ var greenCtx = greenCanvas.getContext('2d');
+ greenCtx.fillStyle = '#0f0';
+ greenCtx.fillRect(0, 0, width, height);
+
+ var redCanvas = document.createElement('canvas');
+ redCanvas.width = width;
+ redCanvas.height = height;
+ var redCtx = redCanvas.getContext('2d');
+ redCtx.fillStyle = '#f00';
+ redCtx.fillRect(0, 0, width, height);
+
+ return Promise.all([
+ createImageBitmap(greenCanvas),
+ createImageBitmap(redCanvas),
+ ]).then(([greenImage, redImage]) => {
+ testTransferFromImageBitmapNullability(greenImage, redImage);
+ });
+},'Test that transferFromImageBitmap(null) discards the previously transferred image');
+
+</script>
diff --git a/testing/web-platform/tests/imagebitmap-renderingcontext/transferFromImageBitmap-null.html b/testing/web-platform/tests/imagebitmap-renderingcontext/transferFromImageBitmap-null.html
new file mode 100644
index 0000000000..ad7af401d7
--- /dev/null
+++ b/testing/web-platform/tests/imagebitmap-renderingcontext/transferFromImageBitmap-null.html
@@ -0,0 +1,65 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>Canvas's ImageBitmapRenderingContext test</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<link rel="help" href="https://html.spec.whatwg.org/multipage/scripting.html#the-imagebitmap-rendering-context">
+<script>
+var width = 10;
+var height = 10;
+
+function testCanvas(bitmapCanvas, r, g, b, a)
+{
+ var myCanvas = document.createElement('canvas');
+ myCanvas.width = width;
+ myCanvas.height = height;
+ var myCtx = myCanvas.getContext('2d');
+ myCtx.drawImage(bitmapCanvas, 0, 0);
+ var color = myCtx.getImageData(5, 5, 1, 1).data;
+ assert_array_equals(color, [r, g, b, a]);
+}
+
+promise_test(function() {
+ function testTransferFromImageBitmapNullability(greenImage, redImage) {
+ var bitmapCanvas = document.createElement('canvas');
+ bitmapCanvas.width = width;
+ bitmapCanvas.height = height;
+ var bitmapCtx = bitmapCanvas.getContext('bitmaprenderer');
+
+ // Make sure the bitmap renderer canvas is filled correctly.
+ bitmapCtx.transferFromImageBitmap(greenImage);
+ testCanvas(bitmapCanvas, 0, 255, 0, 255);
+
+ // Test if passing null resets the bitmap renderer canvas.
+ // Drawing the resetted canvas cannot change the destination canvas.
+ bitmapCtx.transferFromImageBitmap(null);
+ testCanvas(bitmapCanvas, 0, 0, 0, 0);
+
+ // Test if we can redraw the bitmap canvas correctly after reset.
+ bitmapCtx.transferFromImageBitmap(redImage);
+ testCanvas(bitmapCanvas, 255, 0, 0, 255);
+ }
+
+ var greenCanvas = document.createElement('canvas');
+ greenCanvas.width = width;
+ greenCanvas.height = height;
+ var greenCtx = greenCanvas.getContext('2d');
+ greenCtx.fillStyle = '#0f0';
+ greenCtx.fillRect(0, 0, width, height);
+
+ var redCanvas = document.createElement('canvas');
+ redCanvas.width = width;
+ redCanvas.height = height;
+ var redCtx = redCanvas.getContext('2d');
+ redCtx.fillStyle = '#f00';
+ redCtx.fillRect(0, 0, width, height);
+
+ return Promise.all([
+ createImageBitmap(greenCanvas),
+ createImageBitmap(redCanvas),
+ ]).then(([greenImage, redImage]) => {
+ testTransferFromImageBitmapNullability(greenImage, redImage);
+ });
+},'Test that transferFromImageBitmap(null) discards the previously transferred image');
+
+</script>