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Issue 2278723005: Convert LayoutTests/fast/canvas/2d tests to testharness (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Test changed as per the comments. Created 4 years, 3 months ago
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1 <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN"> 1 <!DOCTYPE html>
2 <!-- Test based on that found at 2 <!-- Test based on that found at
3 http://http://philip.html5.org/tests/canvas/suite/tests/index.2d.composite. globalAlpha.html 3 http://philip.html5.org/tests/canvas/suite/tests/index.2d.composite.globalA lpha.html
4 --> 4 -->
5 <html> 5 <title>Test that canvas2d context fills with the globalAlpha property when appli ed</title>
6 <head> 6 <script src="../../resources/testharness.js"></script>
7 <script src="../../resources/js-test.js"></script> 7 <script src="../../resources/testharnessreport.js"></script>
8 </head> 8 <canvas width="100" height="100"></canvas>
9 <body>
10 <canvas id="canvas" width="100" height="100"></canvas>
11 <script> 9 <script>
12 10 test(function() {
13 function assertPixelApprox(ctx, x,y, r,g,b,a, pos, colour, tolerance) 11 function assertPixelApprox(ctx, x, y, r, g, b, a, pos, colour, tolerance) {
14 { 12 var imgdata = ctx.getImageData(x, y, 1, 1);
15 var imgdata = ctx.getImageData(x, y, 1, 1); 13 var diff = Math.max(Math.abs(r-imgdata.data[0]), Math.abs(g-imgdata.data [1]), Math.abs(b-imgdata.data[2]), Math.abs(a-imgdata.data[3]));
16 var diff = Math.max(Math.abs(r-imgdata.data[0]), Math.abs(g-imgdata.data[1]) , Math.abs(b-imgdata.data[2]), Math.abs(a-imgdata.data[3])); 14 assert_less_than_equal(diff, tolerance);
17 shouldBeFalse((diff > tolerance).toString()); 15 }
18 } 16 var ctx = document.querySelector('canvas').getContext('2d');
19 17 ctx.fillStyle = '#0f0';
20 description("The test to ensure correct sync behaviour with globalAlpha and fill Path() in accelerated-2d-canvas mode."); 18 ctx.fillRect(0, 0, 100, 100);
21 var ctx = document.getElementById('canvas').getContext('2d'); 19 ctx.globalAlpha = 0.01; // avoid any potential alpha = 0 optimisations.
22 20 ctx.beginPath();
23 ctx.fillStyle = '#0f0'; 21 ctx.fillStyle = '#f00';
24 ctx.fillRect(0, 0, 100, 100); 22 ctx.rect(0, 0, 100, 100);
25 ctx.globalAlpha = 0.01; // avoid any potential alpha=0 optimisations 23 ctx.fill();
26 ctx.beginPath(); 24 assertPixelApprox(ctx, 50, 25, 2, 253, 0, 255, "50,25", "2,253,0,255", 2);
27 ctx.fillStyle = '#f00'; 25 });
28 ctx.rect(0, 0, 100, 100);
29 ctx.fill();
30 assertPixelApprox(ctx, 50,25, 2,253,0,255, "50,25", "2,253,0,255", 2);
31
32 </script> 26 </script>
33 </body>
34 </html>
35
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