LayoutTests/imported/w3c/web-platform-tests/offscreen-canvas/compositing/2d.composite.uncovered.nocontext.destination-atop.worker.js

// DO NOT EDIT! This test has been generated by tools/gentest.py.
// OffscreenCanvas test in a worker:2d.composite.uncovered.nocontext.destination-atop
// Description:drawImage() of a canvas with no context draws pixels as (0,0,0,0), and does not leave the pixels unchanged.
// Note:

importScripts("/resources/testharness.js");
importScripts("/2dcontext/resources/canvas-tests.js");

var t = async_test("drawImage() of a canvas with no context draws pixels as (0,0,0,0), and does not leave the pixels unchanged.");
var t_pass = t.done.bind(t);
var t_fail = t.step_func(function(reason) {
    throw reason;
});
t.step(function() {

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


ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
ctx.fillRect(0, 0, 100, 50);
ctx.globalCompositeOperation = 'destination-atop';
var offscreenCanvas2 = new OffscreenCanvas(100, 50);
ctx.drawImage(offscreenCanvas2, 0, 0);
_assertPixelApprox(offscreenCanvas, 50,25, 0,0,0,0, "50,25", "0,0,0,0", 5);
t.done();

});
done();