2d.composite.canvas.source-out.html (1053B)
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.canvas.source-out</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.canvas.source-out</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 = 'rgba(0, 255, 255, 0.5)'; 20 ctx.fillRect(0, 0, 100, 50); 21 ctx.globalCompositeOperation = 'source-out'; 22 const canvas2 = new OffscreenCanvas(canvas.width, canvas.height); 23 const ctx2 = canvas2.getContext('2d'); 24 const response = await fetch('/images/yellow75.png') 25 const blob = await response.blob(); 26 const bitmap = await createImageBitmap(blob); 27 ctx2.drawImage(bitmap, 0, 0); 28 ctx.drawImage(canvas2, 0, 0); 29 _assertPixelApprox(canvas, 50,25, 255,255,0,96, 5); 30 31 }, ""); 32 </script>