1 files changed, 165 insertions, 0 deletions
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>
+