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Diffstat (limited to 'testing/web-platform/tests/html/canvas/element/filters/2d.filter.canvasFilterObject.componentTransfer.gamma.tentative.html')
-rw-r--r-- | testing/web-platform/tests/html/canvas/element/filters/2d.filter.canvasFilterObject.componentTransfer.gamma.tentative.html | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/testing/web-platform/tests/html/canvas/element/filters/2d.filter.canvasFilterObject.componentTransfer.gamma.tentative.html b/testing/web-platform/tests/html/canvas/element/filters/2d.filter.canvasFilterObject.componentTransfer.gamma.tentative.html new file mode 100644 index 0000000000..e5bff7e44d --- /dev/null +++ b/testing/web-platform/tests/html/canvas/element/filters/2d.filter.canvasFilterObject.componentTransfer.gamma.tentative.html @@ -0,0 +1,57 @@ +<!DOCTYPE html> +<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. --> +<title>Canvas test: 2d.filter.canvasFilterObject.componentTransfer.gamma.tentative</title> +<script src="/resources/testharness.js"></script> +<script src="/resources/testharnessreport.js"></script> +<script src="/html/canvas/resources/canvas-tests.js"></script> +<link rel="stylesheet" href="/html/canvas/resources/canvas-tests.css"> +<body class="show_output"> + +<h1>2d.filter.canvasFilterObject.componentTransfer.gamma.tentative</h1> +<p class="desc">Test pixels on CanvasFilter() componentTransfer with gamma type</p> + + +<p class="output">Actual output:</p> +<canvas id="c" class="output" width="100" height="50"><p class="fallback">FAIL (fallback content)</p></canvas> + +<ul id="d"></ul> +<script> +var t = async_test("Test pixels on CanvasFilter() componentTransfer with gamma type"); +_addTest(function(canvas, ctx) { + + // From https://www.w3.org/TR/SVG11/filters.html#feComponentTransferElement + function getColor(inputColor, amplitude, exponent, offset) { + return [ + Math.max(0, Math.min(1, Math.pow(inputColor[0]/255, exponent[0]) * amplitude[0] + offset[0])) * 255, + Math.max(0, Math.min(1, Math.pow(inputColor[1]/255, exponent[1]) * amplitude[1] + offset[1])) * 255, + Math.max(0, Math.min(1, Math.pow(inputColor[2]/255, exponent[2]) * amplitude[2] + offset[2])) * 255, + ]; + } + + const amplitudes = [2, 1.1, 0.5]; + const exponents = [5, 3, 1]; + const offsets = [0.25, 0, 0.5]; + ctx.filter = new CanvasFilter({name: 'componentTransfer', + funcR: {type: 'gamma', amplitude: amplitudes[0], exponent: exponents[0], offset: offsets[0]}, + funcG: {type: 'gamma', amplitude: amplitudes[1], exponent: exponents[1], offset: offsets[1]}, + funcB: {type: 'gamma', amplitude: amplitudes[2], exponent: exponents[2], offset: offsets[2]}, + }); + + const inputColors = [ + [255, 255, 255], + [0, 0, 0], + [127, 0, 34], + [252, 186, 3], + [50, 68, 87], + ]; + + for (const color of inputColors) { + let outputColor = getColor(color, amplitudes, exponents, offsets); + ctx.fillStyle = `rgb(${color[0]}, ${color[1]}, ${color[2]})`; + ctx.fillRect(0, 0, 10, 10); + _assertPixelApprox(canvas, 5, 5, outputColor[0],outputColor[1],outputColor[2],255, 2); + } + +}); +</script> + |