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diff --git a/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.linear.tentative.html b/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.linear.tentative.html
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+++ b/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.linear.tentative.html
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+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.filter.canvasFilterObject.componentTransfer.linear.tentative</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.filter.canvasFilterObject.componentTransfer.linear.tentative</h1>
+<p class="desc">Test pixels on CanvasFilter() componentTransfer with linear type</p>
+
+
+<script>
+var t = async_test("Test pixels on CanvasFilter() componentTransfer with linear type");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+ throw reason;
+});
+t.step(function() {
+
+ var canvas = new OffscreenCanvas(100, 50);
+ var ctx = canvas.getContext('2d');
+
+ // From https://www.w3.org/TR/SVG11/filters.html#feComponentTransferElement
+ function getColor(inputColor, slopes, intercepts) {
+ return [
+ Math.max(0, Math.min(1, inputColor[0]/255 * slopes[0] + intercepts[0])) * 255,
+ Math.max(0, Math.min(1, inputColor[1]/255 * slopes[1] + intercepts[1])) * 255,
+ Math.max(0, Math.min(1, inputColor[2]/255 * slopes[2] + intercepts[2])) * 255,
+ ];
+ }
+
+ const slopes = [0.5, 1.2, -0.2];
+ const intercepts = [0.25, 0, 0.5];
+ ctx.filter = new CanvasFilter({name: 'componentTransfer',
+ funcR: {type: 'linear', slope: slopes[0], intercept: intercepts[0]},
+ funcG: {type: 'linear', slope: slopes[1], intercept: intercepts[1]},
+ funcB: {type: 'linear', slope: slopes[2], intercept: intercepts[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, slopes, intercepts);
+ 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);
+ }
+ t.done();
+
+});
+</script>