third_party/WebKit/LayoutTests/fast/canvas/OffscreenCanvas-globalCompositeOperation.html - Issue 2504773003: Support globalCompositeOperation in OffscreenCanvas

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Unified Diff: third_party/WebKit/LayoutTests/fast/canvas/OffscreenCanvas-globalCompositeOperation.html

Issue 2504773003: Support globalCompositeOperation in OffscreenCanvas (Closed)

Patch Set: better testing Created 4 years, 1 month ago

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Index: third_party/WebKit/LayoutTests/fast/canvas/OffscreenCanvas-globalCompositeOperation.html

diff --git a/third_party/WebKit/LayoutTests/fast/canvas/OffscreenCanvas-globalCompositeOperation.html b/third_party/WebKit/LayoutTests/fast/canvas/OffscreenCanvas-globalCompositeOperation.html

new file mode 100644

index 0000000000000000000000000000000000000000..89693dc40dbf8aed4efabf75f419e8ac8f95d892

--- /dev/null

+++ b/third_party/WebKit/LayoutTests/fast/canvas/OffscreenCanvas-globalCompositeOperation.html

@@ -0,0 +1,34 @@

+<!DOCTYPE html>

+<script src="../../resources/testharness.js"></script>

+<script src="../../resources/testharnessreport.js"></script>

+<script>

+test(function() {

+ var width = 50;

+ var height = 50;

+ var offscreenCanvas1 = new OffscreenCanvas(width, height);

+ var ctx1 = offscreenCanvas1.getContext('2d');

+ var offscreenCanvas2 = new OffscreenCanvas(width, height);

+ var ctx2 = offscreenCanvas2.getContext('2d');

+ ctx2.fillStyle = 'rgba(12, 34, 56, 255)';

+ ctx2.fillRect(0, 0, 10, 10);

+ ctx1.fillStyle = 'rgba(24, 68, 108, 255)';

+ ctx1.fillRect(0, 0, width, height);

+ ctx1.globalCompositeOperation = 'source-in';

xlai (Olivia) 2016/11/18 15:16:26 Hmmm, I think it's more important to test this fun

+ ctx1.drawImage(offscreenCanvas2, 0, 0);

+ var color = ctx1.getImageData(25, 25, 1, 1).data;

+ assert_approx_equals(color[0], 0, 5);

+ assert_approx_equals(color[1], 0, 5);

+ assert_approx_equals(color[2], 0, 5);

+ assert_approx_equals(color[3], 0, 5);

+ color = ctx1.getImageData(5, 5, 1, 1).data;

+ assert_approx_equals(color[0], 12, 5);

+ assert_approx_equals(color[1], 34, 5);

+ assert_approx_equals(color[2], 56, 5);

+ assert_approx_equals(color[3], 255, 5);

+}, 'Test globalCompositeOperation API on OffscreenCanvas');

+</script>