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Diffstat (limited to 'testing/web-platform/tests/html/rendering/replaced-elements/attributes-for-embedded-content-and-images/canvas-aspect-ratio.html')
-rw-r--r-- | testing/web-platform/tests/html/rendering/replaced-elements/attributes-for-embedded-content-and-images/canvas-aspect-ratio.html | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/testing/web-platform/tests/html/rendering/replaced-elements/attributes-for-embedded-content-and-images/canvas-aspect-ratio.html b/testing/web-platform/tests/html/rendering/replaced-elements/attributes-for-embedded-content-and-images/canvas-aspect-ratio.html new file mode 100644 index 0000000000..dbe4c7d9f3 --- /dev/null +++ b/testing/web-platform/tests/html/rendering/replaced-elements/attributes-for-embedded-content-and-images/canvas-aspect-ratio.html @@ -0,0 +1,52 @@ +<!doctype html> +<title>Canvas width and height attributes are used as the surface size, and also to infer aspect ratio</title> +<script src="/resources/testharness.js"></script> +<script src="/resources/testharnessreport.js"></script> +<script src="resources/aspect-ratio.js"></script> +<style> + canvas { + width: 100%; + max-width: 100px; + height: auto; + } +</style> +<body> +<canvas id="contained" width="250" height="100" style="contain: size;"></canvas> +<script> +function assert_ratio(img, expected) { + let epsilon = 0.001; + assert_approx_equals(parseInt(getComputedStyle(img).width, 10) / parseInt(getComputedStyle(img).height, 10), expected, epsilon); +} + +function test_computed_style(width, height, expected) { + test_computed_style_aspect_ratio("canvas", {width: width, height: height}, expected); +} + +test(function() { + canvas = document.getElementById("contained"); + assert_ratio(canvas, 2.5); +}, "Canvas width and height attributes are used as the surface size with contain:size"); + +// Create and append a new canvas and immediately check the ratio. +test(function() { + var canvas = document.createElement("canvas"); + canvas.setAttribute("width", "250"); + canvas.setAttribute("height", "100"); + document.body.appendChild(canvas); + // Canvases always use the aspect ratio from their surface size. + assert_ratio(canvas, 2.5); +}, "Canvas width and height attributes are used as the surface size"); + +test_computed_style("10", "20", "auto 10 / 20"); +test_computed_style("0", "1", "auto 0 / 1"); +test_computed_style("1", "0", "auto 1 / 0"); +test_computed_style("0", "0", "auto 0 / 0"); +test_computed_style("0.5", "1.5", "auto 0 / 1"); +test_computed_style("10%", "20", "auto 10 / 20"); +test_computed_style(null, null, "auto"); +test_computed_style("10", null, "auto"); +test_computed_style(null, "20", "auto"); +test_computed_style("xx", "20", "auto"); +test_computed_style("20", "xx", "auto"); + +</script> |