24 lines
907 B
HTML
24 lines
907 B
HTML
<!DOCTYPE html>
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<html>
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<style>
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html, body { margin: 0; padding: 0; }
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canvas {width: 150px; height: 150px; }
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</style>
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<body>
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<p>This test ensures that the PaintWorkletGlobalScope.devicePixelRatio returns
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the correct value, which should be identical as window.devicePixelRatio. To
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manually test, open both this file and "device-pixel-ratio-ref.html" with a
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browser, and you should see two idential green rectangles.</p>
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<canvas id ="canvas" width="100" height="100"></canvas>
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<script>
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var canvas = document.getElementById('canvas');
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canvas.width = 150 * window.devicePixelRatio;
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canvas.height = 150 * window.devicePixelRatio;
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var context = canvas.getContext("2d");
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context.fillStyle = 'green';
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var draw_width = Math.floor(canvas.width / window.devicePixelRatio);
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var draw_height = Math.floor(canvas.height / window.devicePixelRatio);
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context.fillRect(0, 0, draw_width, draw_height);
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</script>
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</body>
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</html>
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