forked from mirrors/gecko-dev
cd5763f4b8
Automatic update from web-platform-tests [webcodecs] Deprecate minor spec violations See bugs, as well as following context https://chromestatus.com/feature/5667793157488640 https://groups.google.com/a/chromium.org/g/blink-dev/c/dnWY4yKbLX8/ Bug: 1275024, 1281015 Change-Id: I7689dc2c04c096673b7961284fee1d08a00e69e2 Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3390729 Commit-Queue: Chrome Cunningham <chcunningham@chromium.org> Auto-Submit: Chrome Cunningham <chcunningham@chromium.org> Reviewed-by: Eugene Zemtsov <eugene@chromium.org> Commit-Queue: Eugene Zemtsov <eugene@chromium.org> Cr-Commit-Position: refs/heads/main@{#961367} -- wpt-commits: e4fd9b008a5de96b579c3512b6ffb9dd3cd98b59 wpt-pr: 32467
50 lines
1.5 KiB
JavaScript
50 lines
1.5 KiB
JavaScript
// META: global=window,dedicatedworker
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function makeRGBACanvas() {
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let canvas = new OffscreenCanvas(32, 32, {alpha: true});
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let ctx = canvas.getContext('2d');
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// Opaque red quadrant.
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ctx.fillStyle = 'rgba(255, 0, 0, 255)';
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ctx.fillRect(0, 0, 16, 16);
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// Opaque blue quadrant.
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ctx.fillStyle = 'rgba(0, 255, 0, 255)';
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ctx.fillRect(16, 0, 16, 16);
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// Opaque green quadrant.
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ctx.fillStyle = 'rgba(0, 0, 255, 255)';
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ctx.fillRect(0, 16, 16, 16);
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// Remaining quadrant should be transparent black.
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return canvas;
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}
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function getPixel(ctx, x, y) {
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let data = ctx.getImageData(x, y, 1, 1).data;
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return data[0] * 2 ** 24 + data[1] * 2 ** 16 + data[2] * 2 ** 8 + data[3];
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}
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function verifyPicture(picture) {
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let canvas = new OffscreenCanvas(32, 32, {alpha: true});
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let ctx = canvas.getContext('2d');
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ctx.drawImage(picture, 0, 0);
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assert_equals(getPixel(ctx, 8, 8), 0xFF0000FF);
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assert_equals(getPixel(ctx, 24, 8), 0x00FF00FF);
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assert_equals(getPixel(ctx, 8, 24), 0x0000FFFF);
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assert_equals(getPixel(ctx, 24, 24), 0x00000000);
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}
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promise_test(async () => {
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let src = makeRGBACanvas();
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let frame = new VideoFrame(src, {alpha: 'keep', timestamp: 0});
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verifyPicture(frame);
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verifyPicture(await createImageBitmap(frame));
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}, 'OffscreenCanvas source preserves alpha');
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promise_test(async () => {
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let src = makeRGBACanvas().transferToImageBitmap();
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let frame = new VideoFrame(src, {alpha: 'keep', timestamp: 0});
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verifyPicture(frame);
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verifyPicture(await createImageBitmap(frame));
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}, 'ImageBitmap source preserves alpha');
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