2d.composite.canvas.copy.worker.js (878B)
1 // DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. 2 // OffscreenCanvas test in a worker:2d.composite.canvas.copy 3 // Description: 4 // Note: 5 6 importScripts("/resources/testharness.js"); 7 importScripts("/html/canvas/resources/canvas-tests.js"); 8 9 promise_test(async t => { 10 var canvas = new OffscreenCanvas(100, 50); 11 var ctx = canvas.getContext('2d'); 12 13 ctx.fillStyle = 'rgba(0, 255, 255, 0.5)'; 14 ctx.fillRect(0, 0, 100, 50); 15 ctx.globalCompositeOperation = 'copy'; 16 const canvas2 = new OffscreenCanvas(canvas.width, canvas.height); 17 const ctx2 = canvas2.getContext('2d'); 18 const response = await fetch('/images/yellow75.png') 19 const blob = await response.blob(); 20 const bitmap = await createImageBitmap(blob); 21 ctx2.drawImage(bitmap, 0, 0); 22 ctx.drawImage(canvas2, 0, 0); 23 _assertPixelApprox(canvas, 50,25, 255,255,0,191, 5); 24 }, ""); 25 done();