| <!DOCTYPE HTML> |
| <script src="../../../resources/testharness.js"></script> |
| <script src="../../../resources/testharnessreport.js"></script> |
| <script> |
| |
| // Reference values generated by: |
| // https://fiddle.skia.org/c/8e7238b69744678e75b3e34715b29e0b |
| |
| // sRGB(155,27,27,255) |
| var p3OpaqueRed = [0.55664, 0.15686, 0.13330, 1.0]; |
| // sRGB(27,155,27,255) |
| var p3OpaqueGreen = [0.28613, 0.59961, 0.20386, 1.0]; |
| // sRGB(27,27,155,255) |
| var p3OpaqueBlue = [0.10583, 0.10583, 0.58398, 1.0]; |
| // sRGB(27,27,27,255) |
| var p3OpaqueBlack = [0.10583, 0.10583, 0.10583, 1.0]; |
| |
| function testPixels(ctx, tests, imageSetting) |
| { |
| var actual, expected, tolerance = 0.01; |
| for (var i = 0; i < tests.length; i++) { |
| actual = ctx.getImageData(tests[i].x, tests[i].y, 1, 1, imageSetting).data; |
| expected = tests[i].color; |
| assert_true(actual.length === expected.length); |
| for (var j = 0; j < actual.length; j++) |
| assert_approx_equals(actual[j], expected[j], tolerance); |
| } |
| } |
| |
| function drawSRGBImageOnP3Canvas(source) |
| { |
| var canvas = document.createElement('canvas'); |
| canvas.width = 20; |
| canvas.height = 20; |
| var ctx = canvas.getContext('2d', |
| {colorSpace: 'display-p3', pixelFormat:'float16'}); |
| ctx.drawImage(source, 0, 0); |
| var tests = [{x: 5, y: 5, color: p3OpaqueRed}, |
| {x: 15, y: 5, color: p3OpaqueGreen}, |
| {x: 5, y: 15, color: p3OpaqueBlue}, |
| {x: 15, y: 15, color: p3OpaqueBlack}]; |
| testPixels(ctx, tests, {colorSpace: 'display-p3', storageFormat:'float32'}); |
| } |
| |
| promise_test(function() { |
| return new Promise((resolve, reject) => { |
| var image = new Image(); |
| image.onload = function() { |
| resolve(image); |
| } |
| image.src = 'resources/pattern-srgb.png' |
| }).then(drawSRGBImageOnP3Canvas); |
| }, 'Draw SRGB image on a P3 canvas and read back the P3 pixels.'); |
| |
| </script> |
| |
