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Test Info:
- This WPT test may be referenced by the following Test IDs:
- /html/canvas/element/compositing/2d.composite.uncovered.image.source-out.html - WPT Dashboard Interop Dashboard
<!DOCTYPE html>
<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
<title>Canvas test: 2d.composite.uncovered.image.source-out</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/html/canvas/resources/canvas-tests.js"></script>
<link rel="stylesheet" href="/html/canvas/resources/canvas-tests.css">
<body class="show_output">
<h1>2d.composite.uncovered.image.source-out</h1>
<p class="desc">drawImage() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.</p>
<p class="output">Actual output:</p>
<canvas id="c" class="output" width="100" height="50"><p class="fallback">FAIL (fallback content)</p></canvas>
<p class="output expectedtext">Expected output:<p><img src="2d.composite.uncovered.image.source-out.png" class="output expected" id="expected" alt="">
<ul id="d"></ul>
<script>
var t = async_test("drawImage() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.");
_addTest(function(canvas, ctx) {
ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
ctx.fillRect(0, 0, 100, 50);
ctx.globalCompositeOperation = 'source-out';
ctx.drawImage(document.getElementById('yellow.png'), 40, 40, 10, 10, 40, 50, 10, 10);
_assertPixelApprox(canvas, 15,15, 0,0,0,0, 5);
_assertPixelApprox(canvas, 50,25, 0,0,0,0, 5);
});
</script>
<img src="/images/yellow.png" id="yellow.png" class="resource">