| Index: third_party/WebKit/LayoutTests/fast/canvas/OffscreenCanvas-placeholder-createImageBitmap.html
|
| diff --git a/third_party/WebKit/LayoutTests/fast/canvas/OffscreenCanvas-placeholder-createImageBitmap.html b/third_party/WebKit/LayoutTests/fast/canvas/OffscreenCanvas-placeholder-createImageBitmap.html
|
| new file mode 100644
|
| index 0000000000000000000000000000000000000000..398869ec2b225f6233a635a05c968309ac7079c8
|
| --- /dev/null
|
| +++ b/third_party/WebKit/LayoutTests/fast/canvas/OffscreenCanvas-placeholder-createImageBitmap.html
|
| @@ -0,0 +1,45 @@
|
| +<!DOCTYPE HTML>
|
| +<html>
|
| +<head>
|
| +<script src="../../resources/testharness.js"></script>
|
| +<script src="../../resources/testharnessreport.js"></script>
|
| +</head>
|
| +<body>
|
| +<script>
|
| +async_test(function(t) {
|
| + var canvas = document.createElement('canvas');
|
| + var offscreen = canvas.transferControlToOffscreen();
|
| + var ctx = offscreen.getContext('2d');
|
| + ctx.fillStyle = '#0f0';
|
| + ctx.fillRect(0, 0, canvas.width, canvas.height);
|
| + ctx.commit();
|
| +
|
| + var testCanvas = document.createElement('canvas');
|
| + var testCtx = testCanvas.getContext('2d');
|
| +
|
| + createImageBitmap(canvas).then(image => {
|
| + testCtx.drawImage(image, 0, 0);
|
| + t.step( function() {
|
| + var pixel = testCtx.getImageData(0, 0, 1, 1).data;
|
| + var expectedValue = [0, 0, 0, 0]; // pixel is blank because commit() is async
|
| + assert_array_equals(pixel, expectedValue, "Verify that commit() is not synchronous.");
|
| + });
|
| +
|
| + // The call to setTimeout acts as a synchronization barrier to guarantee that
|
| + // the commit has propagated.
|
| + setTimeout(function() {
|
| + createImageBitmap(canvas).then(image => {
|
| + testCtx.drawImage(image, 0, 0);
|
| + t.step( function() {
|
| + var pixel = testCtx.getImageData(0, 0, 1, 1).data;
|
| + var expectedValue = [0, 255, 0, 255];
|
| + assert_array_equals(pixel, expectedValue, "Verify that async update of placeholder propagated through createImageData");
|
| + });
|
| + t.done();
|
| + });
|
| + }, 0);
|
| + });
|
| +}, "Test whether createImageBitmap on a placeholder canvas captures the image committed to the associated OffscreenCanvas.");
|
| +</script>
|
| +</body>
|
| +</html>
|
|
|
Chromium Code Reviews
Issue 2506043002:
Allow ImageBitmap objects to be created from placeholder canvases. (Closed)
