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Update web-platform-tests to revision b'468d01bbd84da2babf265c6af46947be68713440'

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WPT Sync Bot 2021-09-07 11:16:33 +00:00 • committed by cybai
parent 35e95f55a1
commit 58e8ee674b
9438 changed files with 266112 additions and 106976 deletions
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tests/wpt/web-platform-tests/webcodecs/videoFrame-alpha.any.js Normal file
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// META: global=window,dedicatedworker
function makeRGBACanvas() {
let canvas = new OffscreenCanvas(32, 32, {alpha: true});
let ctx = canvas.getContext('2d');
// Opaque red quadrant.
ctx.fillStyle = 'rgba(255, 0, 0, 255)';
ctx.fillRect(0, 0, 16, 16);
// Opaque blue quadrant.
ctx.fillStyle = 'rgba(0, 255, 0, 255)';
ctx.fillRect(16, 0, 16, 16);
// Opaque green quadrant.
ctx.fillStyle = 'rgba(0, 0, 255, 255)';
ctx.fillRect(0, 16, 16, 16);
// Remaining quadrant should be transparent black.
return canvas;
}
function getPixel(ctx, x, y) {
let data = ctx.getImageData(x, y, 1, 1).data;
return data[0] * 2 ** 24 + data[1] * 2 ** 16 + data[2] * 2 ** 8 + data[3];
}
function verifyPicture(picture) {
let canvas = new OffscreenCanvas(32, 32, {alpha: true});
let ctx = canvas.getContext('2d');
ctx.drawImage(picture, 0, 0);
assert_equals(getPixel(ctx, 8, 8), 0xFF0000FF);
assert_equals(getPixel(ctx, 24, 8), 0x00FF00FF);
assert_equals(getPixel(ctx, 8, 24), 0x0000FFFF);
assert_equals(getPixel(ctx, 24, 24), 0x00000000);
}
promise_test(async () => {
let src = makeRGBACanvas();
let frame = new VideoFrame(src, {alpha: 'keep'});
verifyPicture(frame);
verifyPicture(await createImageBitmap(frame));
}, 'OffscreenCanvas source preserves alpha');
promise_test(async () => {
let src = makeRGBACanvas().transferToImageBitmap();
let frame = new VideoFrame(src, {alpha: 'keep'});
verifyPicture(frame);
verifyPicture(await createImageBitmap(frame));
}, 'ImageBitmap source preserves alpha');