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

<h1>2d.shadow.pattern.alpha</h1>
<p class="desc">Shadows are drawn correctly for partially-transparent fill patterns</p>


<script>
var t = async_test("Shadows are drawn correctly for partially-transparent fill patterns");
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');

var promise = new Promise(function(resolve, reject) {
    var xhr = new XMLHttpRequest();
    xhr.open("GET", '/images/transparent50.png');
    xhr.responseType = 'blob';
    xhr.send();
    xhr.onload = function() {
        resolve(xhr.response);
    };
});
promise.then(function(response) {
    createImageBitmap(response).then(bitmap => {
        var pattern = ctx.createPattern(bitmap, 'repeat');
        ctx.fillStyle = '#f00';
        ctx.fillRect(0, 0, 100, 50);
        ctx.shadowOffsetY = 50;
        ctx.shadowColor = '#00f';
        ctx.fillStyle = pattern;
        ctx.fillRect(0, -50, 100, 50);
    }, t_fail);
}).then(t_pass, t_fail);

});
</script>
