canvas_compositing_globalcompositeoperation_001-ref.htm

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<html>
    <head>
        <title>HTML5 Canvas Test:  globalCompositeOperation "destination-over"</title>
        <link rel="author" title="Microsoft" href="http://www.microsoft.com" />
    </head>
    <body>
        <p>Description: If the globalCompositeOperation is set to "destination-over", display the destination image wherever the destination image is opaque.</p>
        <div><img alt='black rectangle' src="/images/black-rectangle.png"></div>
    </body>
</html>

chromium/third_party/blink/web_tests/external/wpt/html/canvas/element/manual/compositing/canvas_compositing_globalcompositeoperation_001-ref.htm