Simon Wülker
40e82626be
Automatic update from web-platform-tests Add web platform test Signed-off-by: Simon Wülker <simon.wuelker@arcor.de> -- wpt-commits: a356a0d465d19bce723877723520765f6241f432 wpt-pr: 58460
28 lines
981 B
HTML
28 lines
981 B
HTML
<!DOCTYPE html>
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<head>
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<meta charset="UTF-8">
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<meta rel="author" title="Simon Wülker" href="simon.wuelker@arcor.de">
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<meta name="assert" content="Calling putImageData should update the displayed canvas data">
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<title>putImageData() causes the canvas to be redrawn</title>
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<link rel="match" href="2d.putImageData-ref.html">
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<link rel="help" href="https://github.com/servo/servo/pull/43218">
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</head>
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<body>
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<canvas id="canvas" width="50px" height="50px"></canvas>
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<script>
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let ctx = canvas.getContext("2d")
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let size = 50;
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var pixels = ctx.createImageData(size, size);
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for(var x = 0; x < size; x++) {
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for(var y = 0; y < size; y++) {
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pixels.data[(x + y * size) * 4 + 0] = 0;
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pixels.data[(x + y * size) * 4 + 1] = 255;
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pixels.data[(x + y * size) * 4 + 2] = 0;
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pixels.data[(x + y * size) * 4 + 3] = 255;
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}
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}
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ctx.putImageData(pixels, 0, 0);
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</script>
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</body>
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