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Unified Diff: third_party/WebKit/LayoutTests/fast/canvas/OffscreenCanvas-2d-globalAlpha.html

Issue 2526693003: Make OffscreenCanvas 2D context support globalAlpha (Closed)
Patch Set: clean up tests Created 4 years ago
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Index: third_party/WebKit/LayoutTests/fast/canvas/OffscreenCanvas-2d-globalAlpha.html
diff --git a/third_party/WebKit/LayoutTests/fast/canvas/OffscreenCanvas-2d-globalAlpha.html b/third_party/WebKit/LayoutTests/fast/canvas/OffscreenCanvas-2d-globalAlpha.html
new file mode 100644
index 0000000000000000000000000000000000000000..982e1d23713d83c59cf16012c19cd933f3f982f8
--- /dev/null
+++ b/third_party/WebKit/LayoutTests/fast/canvas/OffscreenCanvas-2d-globalAlpha.html
@@ -0,0 +1,40 @@
+<html>
+<body>
+<canvas id="canvas" width="600" height="100" ></canvas>
+<script>
+var canvas = document.getElementById("canvas");
+var context = canvas.getContext("2d");
+
+var offscreenCanvas1 = new OffscreenCanvas(100, 100);
+var ctx1 = offscreenCanvas1.getContext('2d');
+ctx1.fillStyle = 'green';
+ctx1.fillRect(0, 0, 100, 100);
+var offscreenCanvas2 = new OffscreenCanvas(100, 100);
+var ctx2 = offscreenCanvas2.getContext('2d');
+
+ctx2.globalAlpha = 0.0;
+ctx2.drawImage(offscreenCanvas1, 0, 0);
+context.drawImage(offscreenCanvas2, 0, 0, 100, 100, 0, 0, 100, 100);
+
+ctx2.globalAlpha = 0.2;
+ctx2.drawImage(offscreenCanvas1, 0, 0);
+context.drawImage(offscreenCanvas2, 0, 0, 100, 100, 100, 0, 100, 100);
+
+ctx2.globalAlpha = 0.4;
+ctx2.drawImage(offscreenCanvas1, 0, 0);
+context.drawImage(offscreenCanvas2, 0, 0, 100, 100, 200, 0, 100, 100);
+
+ctx2.globalAlpha = 0.6;
+ctx2.drawImage(offscreenCanvas1, 0, 0);
+context.drawImage(offscreenCanvas2, 0, 0, 100, 100, 300, 0, 100, 100);
+
+ctx2.globalAlpha = 0.8;
+ctx2.drawImage(offscreenCanvas1, 0, 0);
+context.drawImage(offscreenCanvas2, 0, 0, 100, 100, 400, 0, 100, 100);
+
+ctx2.globalAlpha = 1.0;
+ctx2.drawImage(offscreenCanvas1, 0, 0);
+context.drawImage(offscreenCanvas2, 0, 0, 100, 100, 500, 0, 100, 100);
+</script>
+</body>
+</html>
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