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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 09:22:09 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 09:22:09 +0000
commit43a97878ce14b72f0981164f87f2e35e14151312 (patch)
tree620249daf56c0258faa40cbdcf9cfba06de2a846 /testing/web-platform/tests/imagebitmap-renderingcontext/context-creation-offscreen-with-alpha.html
parentInitial commit. (diff)
downloadfirefox-upstream.tar.xz
firefox-upstream.zip
Adding upstream version 110.0.1.upstream/110.0.1upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
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+<!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>