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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
| commit | 36d22d82aa202bb199967e9512281e9a53db42c9 (patch) | |
| tree | 105e8c98ddea1c1e4784a60a5a6410fa416be2de /testing/web-platform/tests/css/css-paint-api/hidpi/device-pixel-ratio-ref.html | |
| parent | Initial commit. (diff) | |
| download | firefox-esr-upstream.tar.xz firefox-esr-upstream.zip | |
Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'testing/web-platform/tests/css/css-paint-api/hidpi/device-pixel-ratio-ref.html')
| -rw-r--r-- | testing/web-platform/tests/css/css-paint-api/hidpi/device-pixel-ratio-ref.html | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/testing/web-platform/tests/css/css-paint-api/hidpi/device-pixel-ratio-ref.html b/testing/web-platform/tests/css/css-paint-api/hidpi/device-pixel-ratio-ref.html new file mode 100644 index 0000000000..205cf8963b --- /dev/null +++ b/testing/web-platform/tests/css/css-paint-api/hidpi/device-pixel-ratio-ref.html @@ -0,0 +1,24 @@ +<!DOCTYPE html> +<html> +<style> +html, body { margin: 0; padding: 0; } +canvas {width: 150px; height: 150px; } +</style> +<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> +<canvas id ="canvas" width="100" height="100"></canvas> +<script> +var canvas = document.getElementById('canvas'); +canvas.width = 150 * window.devicePixelRatio; +canvas.height = 150 * window.devicePixelRatio; +var context = canvas.getContext("2d"); +context.fillStyle = 'green'; +var draw_width = Math.floor(canvas.width / window.devicePixelRatio); +var draw_height = Math.floor(canvas.height / window.devicePixelRatio); +context.fillRect(0, 0, draw_width, draw_height); +</script> +</body> +</html> |