2d.composite.uncovered.image.source-out.worker.js (999B)
1 // DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. 2 // OffscreenCanvas test in a worker:2d.composite.uncovered.image.source-out 3 // Description:drawImage() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged. 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 = 'source-out'; 16 const response = await fetch('/images/yellow.png') 17 const blob = await response.blob(); 18 const bitmap = await createImageBitmap(blob); 19 ctx.drawImage(bitmap, 40, 40, 10, 10, 40, 50, 10, 10); 20 _assertPixelApprox(canvas, 50,25, 0,0,0,0, 5); 21 }, "drawImage() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged."); 22 done();