summaryrefslogtreecommitdiffstats
path: root/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.fill.worker.js
blob: 3ea8aa7ebeeb79bcef05c8ef3fcab66c0b18673d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
// OffscreenCanvas test in a worker:2d.composite.globalAlpha.fill
// Description:
// Note:

importScripts("/resources/testharness.js");
importScripts("/html/canvas/resources/canvas-tests.js");

var t = async_test("");
var t_pass = t.done.bind(t);
var t_fail = t.step_func(function(reason) {
    throw reason;
});
t.step(function() {

  var canvas = new OffscreenCanvas(100, 50);
  var ctx = canvas.getContext('2d');

  ctx.fillStyle = '#0f0';
  ctx.fillRect(0, 0, 100, 50);
  // Avoiding any potential alpha = 0 optimisations.
  ctx.globalAlpha = 0.01;
  ctx.fillStyle = '#f00';
  ctx.fillRect(0, 0, 100, 50);
  _assertPixelApprox(canvas, 50,25, 2,253,0,255, 2);
  t.done();
});
done();