| <!DOCTYPE HTML> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script> |
| |
| // sRGB(226,31,31,128) |
| var e_sRGB_TransparentRed = [0.886230, 0.121521, 0.121521, 0.501953]; |
| // sRGB(226,31,31,128) |
| var e_sRGB_TransparentGreen = [0.121521, 0.886230, 0.121521, 0.501953]; |
| // sRGB(226,31,31,128) |
| var e_sRGB_TransparentBlue = [0.121521, 0.121521, 0.886230, 0.501953]; |
| // sRGB(226,31,31,128) |
| var e_sRGB_TransparentBlack = [0.121521, 0.121521, 0.121521, 0.501953]; |
| |
| 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_equals(actual.length, expected.length); |
| for (var j = 0; j < actual.length; j++) |
| assert_approx_equals(actual[j], expected[j], tolerance); |
| } |
| } |
| |
| function drawSRGBImageOnExtendedSRGBCanvas(source) |
| { |
| var canvas = document.createElement('canvas'); |
| canvas.width = 20; |
| canvas.height = 20; |
| var ctx = canvas.getContext('2d', |
| {colorSpace: 'srgb', pixelFormat:'float16'}); |
| ctx.drawImage(source, 0, 0); |
| var tests = [{x: 5, y: 5, color: e_sRGB_TransparentRed}, |
| {x: 15, y: 5, color: e_sRGB_TransparentGreen}, |
| {x: 5, y: 15, color: e_sRGB_TransparentBlue}, |
| {x: 15, y: 15, color: e_sRGB_TransparentBlack}]; |
| testPixels(ctx, tests, {colorSpace: 'srgb', storageFormat:'float32'}); |
| } |
| |
| promise_test(function() { |
| return new Promise((resolve, reject) => { |
| var image = new Image(); |
| image.onload = function() { |
| resolve(image); |
| } |
| image.src = 'resources/pattern-semitransparent-srgb.png' |
| }).then(drawSRGBImageOnExtendedSRGBCanvas); |
| }, 'Draw SRGB image on an e-sRGB canvas and read back the e-sRGB pixels.'); |
| |
| </script> |
| |
