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Test Info:
- This WPT test may be referenced by the following Test IDs:
- /css/css-paint-api/hidpi/device-pixel-ratio.https.html - WPT Dashboard Interop Dashboard
<!DOCTYPE html>
<html class="reftest-wait">
<link rel="match" href="device-pixel-ratio-ref.html">
<style>
html, body { margin: 0; padding: 0; }
.container {
width: 150px;
height: 150px;
}
#canvas-geometry {
background-image: paint(geometry);
}
</style>
<script src="/common/reftest-wait.js"></script>
<script src="/common/worklet-reftest.js"></script>
<body>
<p>This test ensures that the PaintWorkletGlobalScope.devicePixelRatio returns
the correct value, which should be identical as window.devicePixelRatio. To
manually test, open both this file and "device-pixel-ratio-ref.html" with a
browser, and you should see two idential green rectangles.</p>
<div id="canvas-geometry" class="container"></div>
<script id="code" type="text/worklet">
registerPaint('geometry', class {
paint(ctx, geom) {
ctx.fillStyle = 'green';
var draw_width = Math.floor(geom.width / devicePixelRatio);
var draw_height = Math.floor(geom.height / devicePixelRatio);
ctx.fillRect(0, 0, draw_width, draw_height);
}
});
</script>
<script>
importWorkletAndTerminateTestAfterAsyncPaint(CSS.paintWorklet, document.getElementById('code').textContent);
</script>
</body>
</html>