2d.composite.image.source-atop.html (914B)
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.image.source-atop</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.image.source-atop</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-atop'; 22 const response = await fetch('/images/yellow75.png') 23 const blob = await response.blob(); 24 const bitmap = await createImageBitmap(blob); 25 ctx.drawImage(bitmap, 0, 0); 26 _assertPixelApprox(canvas, 50,25, 191,255,64,128, 5); 27 28 }, ""); 29 </script>