1 // DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
2 // OffscreenCanvas test in a worker:2d.composite.globalAlpha.imagepattern
6 importScripts("/resources/testharness.js");
7 importScripts("/html/canvas/resources/canvas-tests.js");
9 var t = async_test("");
10 var t_pass = t.done.bind(t);
11 var t_fail = t.step_func(function(reason) {
16 var canvas = new OffscreenCanvas(100, 50);
17 var ctx = canvas.getContext('2d');
19 ctx.fillStyle = '#0f0';
20 ctx.fillRect(0, 0, 100, 50);
21 var promise = new Promise(function(resolve, reject) {
22 var xhr = new XMLHttpRequest();
23 xhr.open("GET", '/images/red.png');
24 xhr.responseType = 'blob';
26 xhr.onload = function() {
27 resolve(xhr.response);
30 promise.then(function(response) {
31 createImageBitmap(response).then(bitmap => {
32 ctx.fillStyle = ctx.createPattern(bitmap, 'no-repeat');
33 ctx.globalAlpha = 0.01; // avoid any potential alpha=0 optimisations
34 ctx.fillRect(0, 0, 100, 50);
35 _assertPixelApprox(canvas, 50,25, 2,253,0,255, 2);
37 }).then(t_pass, t_fail);