summaryrefslogtreecommitdiffstats
path: root/testing/web-platform/tests/html/canvas/element/filters/2d.filter.canvasFilterObject.componentTransfer.gamma.tentative.html
diff options
context:
space:
mode:
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.html57
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>
+