mozilla-release/testing/web-platform/tests/offscreen-canvas/compositing/2d.composite.solid.source-atop.html

<!DOCTYPE html>
<!-- DO NOT EDIT! This test has been generated by tools/gentest.py. -->
<title>OffscreenCanvas test: 2d.composite.solid.source-atop</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/common/canvas-tests.js"></script>

<h1>2d.composite.solid.source-atop</h1>
<p class="desc"></p>


<script>
var t = async_test("");
t.step(function() {

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


ctx.fillStyle = 'rgba(0, 255, 255, 1.0)';
ctx.fillRect(0, 0, 100, 50);
ctx.globalCompositeOperation = 'source-atop';
ctx.fillStyle = 'rgba(255, 255, 0, 1.0)';
ctx.fillRect(0, 0, 100, 50);
_assertPixelApprox(offscreenCanvas, 50,25, 255,255,0,255, "50,25", "255,255,0,255", 5);

t.done();

});
</script>