mozilla-release/testing/web-platform/tests/offscreen-canvas/shadows/2d.shadow.image.transparent.1.html

<!DOCTYPE html>
<!-- DO NOT EDIT! This test has been generated by tools/gentest.py. -->
<title>OffscreenCanvas test: 2d.shadow.image.transparent.1</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/common/canvas-tests.js"></script>

<h1>2d.shadow.image.transparent.1</h1>
<p class="desc">Shadows are not drawn for transparent images</p>


<script>
var t = async_test("Shadows are not drawn for transparent images");
t.step(function() {

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

ctx.fillStyle = '#0f0';
ctx.fillRect(0, 0, 100, 50);
ctx.shadowColor = '#f00';
ctx.shadowOffsetY = 50;
var promise = new Promise(function(resolve, reject) {
    var xhr = new XMLHttpRequest();
    xhr.open("GET", '/images/transparent.png');
    xhr.responseType = 'blob';
    xhr.send();
    xhr.onload = function() {
        resolve(xhr.response);
    };
});
promise.then(function(response) {
    ctx.drawImage(response, 0, -50);
    _assertPixel(offscreenCanvas, 50,25, 0,255,0,255, "50,25", "0,255,0,255");
});

t.done();

});
</script>