diff options
Diffstat (limited to '')
-rw-r--r-- | testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.linear.tentative.worker.js | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.linear.tentative.worker.js b/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.linear.tentative.worker.js new file mode 100644 index 0000000000..fb2e01876f --- /dev/null +++ b/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.linear.tentative.worker.js @@ -0,0 +1,52 @@ +// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. +// OffscreenCanvas test in a worker:2d.filter.canvasFilterObject.componentTransfer.linear.tentative +// Description:Test pixels on CanvasFilter() componentTransfer with linear type +// Note: + +importScripts("/resources/testharness.js"); +importScripts("/html/canvas/resources/canvas-tests.js"); + +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(); +}); +done(); |