2d.composite.globalAlpha.imagepattern.html (993B)
1 <!DOCTYPE html> 2 <!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. --> 3 <meta charset="UTF-8"> 4 <title>OffscreenCanvas test: 2d.composite.globalAlpha.imagepattern</title> 5 <script src="/resources/testharness.js"></script> 6 <script src="/resources/testharnessreport.js"></script> 7 <script src="/html/canvas/resources/canvas-tests.js"></script> 8 9 <h1>2d.composite.globalAlpha.imagepattern</h1> 10 <p class="desc"></p> 11 12 13 <script> 14 promise_test(async t => { 15 16 var canvas = new OffscreenCanvas(100, 50); 17 var ctx = canvas.getContext('2d'); 18 19 ctx.fillStyle = '#0f0'; 20 ctx.fillRect(0, 0, 100, 50); 21 const response = await fetch('/images/red.png'); 22 const blob = await response.blob(); 23 const bitmap = await createImageBitmap(blob); 24 25 ctx.fillStyle = ctx.createPattern(bitmap, 'no-repeat'); 26 // Avoiding any potential alpha = 0 optimisations. 27 ctx.globalAlpha = 0.01; 28 ctx.fillRect(0, 0, 100, 50); 29 _assertPixelApprox(canvas, 50,25, 2,253,0,255, 2); 30 31 }, ""); 32 </script>