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https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
49346550bd
The output merger stage was expecting premultiplied alpha and we were giving non-premultiplied. Fix by premultiplying in the shader. Also adds a reftest for this situation.
25 lines
596 B
HTML
25 lines
596 B
HTML
<!doctype html>
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<head>
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<style>
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body {
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background-color: blue;
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}
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</style>
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<body>
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<canvas id="mycanvas" width="200" height="200"></canvas>
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<script type="text/javascript">
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var cx = document.getElementById('mycanvas').getContext('2d');
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var g = cx.createRadialGradient(100, 100, 50, 100, 100, 75);
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g.addColorStop(0, 'rgba(100%, 100%, 0%, 0.5)');
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g.addColorStop(1, 'rgba(100%, 100%, 0%, 0)');
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cx.fillStyle = g;
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cx.fillRect(0, 0, 200, 200);
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cx.beginPath();
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cx.arc(100, 100, 80, 0, Math.PI*2, true);
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cx.closePath();
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cx.fillStyle = "white";
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cx.fill();
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</script>
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