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Issue 14298018: This CL implements the first draft of Canvas 2D Context Attributes, aka getContext('2d', { alpha: f… (Closed) Base URL: svn://svn.chromium.org/blink/trunk
Patch Set: Fixes from review comments; remove WebPreferences.h changes; fix comment. Created 7 years, 8 months ago
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1 description("Series of tests for canvas alpha");
2
3 var canvas1 = document.getElementById("canvas1");
4 var canvas2 = document.getElementById("canvas2");
5 var ctx1 = canvas1.getContext("2d");
6 var ctx2 = canvas2.getContext("2d", { alpha: false } );
7 var ctx3 = canvas3.getContext("2d", {} );
8 var imgData1 = ctx1.getImageData(0, 0, 1, 1);
9 shouldBe("ctx1.getContextAttributes().alpha", "true");
10 shouldBe("imgData1.data[0]", "0");
11 shouldBe("imgData1.data[1]", "0");
12 shouldBe("imgData1.data[2]", "0");
13 shouldBe("imgData1.data[3]", "0");
14 var imgData2 = ctx2.getImageData(0, 0, 1, 1);
15 shouldBe("ctx2.getContextAttributes().alpha", "false");
16 shouldBe("imgData2.data[0]", "0");
17 shouldBe("imgData2.data[1]", "0");
18 shouldBe("imgData2.data[2]", "0");
19 shouldBe("imgData2.data[3]", "255");
20 var imgData3 = ctx3.getImageData(0, 0, 1, 1);
21 shouldBe("ctx3.getContextAttributes().alpha", "true");
22 shouldBe("imgData3.data[0]", "0");
23 shouldBe("imgData3.data[1]", "0");
24 shouldBe("imgData3.data[2]", "0");
25 shouldBe("imgData3.data[3]", "0");
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