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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
| commit | 6bf0a5cb5034a7e684dcc3500e841785237ce2dd (patch) | |
| tree | a68f146d7fa01f0134297619fbe7e33db084e0aa /testing/web-platform/tests/imagebitmap-renderingcontext/context-creation-offscreen-with-alpha.html | |
| parent | Initial commit. (diff) | |
| download | thunderbird-upstream.tar.xz thunderbird-upstream.zip | |
Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'testing/web-platform/tests/imagebitmap-renderingcontext/context-creation-offscreen-with-alpha.html')
| -rw-r--r-- | testing/web-platform/tests/imagebitmap-renderingcontext/context-creation-offscreen-with-alpha.html | 62 |
1 files changed, 62 insertions, 0 deletions
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> |