| <script src="../../resources/testharness.js"></script> |
| <script src="../../resources/testharnessreport.js"></script> |
| <body> |
| <script> |
| |
| // Ensure correct behavior of canvas with path stroke using a strokeStyle color with alpha and a shadow. |
| |
| var canvas = document.createElement('canvas'); |
| document.body.appendChild(canvas); |
| canvas.setAttribute('width', '600'); |
| canvas.setAttribute('height', '1100'); |
| var ctx = canvas.getContext('2d'); |
| |
| ctx.save(); |
| ctx.strokeStyle = 'rgba(0, 0, 255, 0.5)'; |
| ctx.shadowColor = 'rgba(255, 0, 0, 0.5)'; |
| ctx.shadowOffsetX = 250; |
| ctx.lineWidth = 50; |
| |
| function strokePath(x, y) { |
| ctx.beginPath(); |
| ctx.arc(x, y, 75, 0, Math.PI*2, true); |
| ctx.stroke(); |
| } |
| |
| // Alpha shadow. |
| ctx.shadowBlur = 0; |
| strokePath(150, 150); |
| |
| // Blurry shadow. |
| ctx.shadowBlur = 10; |
| strokePath(150, 400); |
| |
| ctx.rotate(Math.PI/2); |
| |
| // Rotated alpha shadow. |
| ctx.shadowBlur = 0; |
| strokePath(650, -150); |
| |
| // Rotated blurry shadow. |
| ctx.shadowBlur = 10; |
| strokePath(900, -150); |
| |
| ctx.restore(); |
| |
| var imageData, data; |
| ctx.fillStyle = 'black'; |
| |
| function testPixelAlphaShadow(x, y, color) |
| { |
| if (color.length == 4) { |
| assert_array_equals(ctx.getImageData(x, y, 1, 1).data, color); |
| } else { // we expect to have [r, g, b, a, alphaTolerance] |
| var data = ctx.getImageData(x, y, 1, 1).data; |
| assert_array_equals(data.slice(0,3), color.slice(0,3)); |
| assert_approx_equals(data[3], color[3], color[4]); |
| } |
| // Plot test point. |
| ctx.fillRect(x, y, 3, 3); |
| } |
| |
| var alphaTolerance = 15; |
| var testPixelAlphaShadowScenarios = [ |
| ['Verify alpha shadow 1', 400, 150, [0, 0, 0, 0]], |
| ['Verify alpha shadow 2', 400, 75, [255, 0, 0, 64, alphaTolerance]], |
| ['Verify alpha shadow 3', 400, 225, [255, 0, 0, 64, alphaTolerance]], |
| ['Verify alpha shadow 4', 325, 150, [255, 0, 0, 64, alphaTolerance]], |
| ['Verify alpha shadow 5', 475, 150, [255, 0, 0, 64, alphaTolerance]], |
| |
| ['Verify blurry shadow 1', 400, 400, [0, 0, 0, 0]], |
| ['Verify blurry shadow 2', 400, 300, [255, 0, 0, 31, alphaTolerance]], |
| ['Verify blurry shadow 3', 400, 500, [255, 0, 0, 31, alphaTolerance]], |
| ['Verify blurry shadow 4', 300, 400, [255, 0, 0, 31, alphaTolerance]], |
| ['Verify blurry shadow 5', 500, 400, [255, 0, 0, 31, alphaTolerance]], |
| |
| ['Verify rotated alpha shadow 1', 400, 650, [0, 0, 0, 0]], |
| ['Verify rotated alpha shadow 2', 400, 575, [255, 0, 0, 64, alphaTolerance]], |
| ['Verify rotated alpha shadow 3', 400, 725, [255, 0, 0, 64, alphaTolerance]], |
| ['Verify rotated alpha shadow 4', 325, 650, [255, 0, 0, 64, alphaTolerance]], |
| ['Verify rotated alpha shadow 5', 475, 650, [255, 0, 0, 64, alphaTolerance]], |
| |
| ['Verify rotated blurry shadow 1', 400, 900, [0, 0, 0, 0]], |
| ['Verify rotated blurry shadow 2', 400, 800, [255, 0, 0, 31, alphaTolerance]], |
| ['Verify rotated blurry shadow 3', 400, 1000, [255, 0, 0, 31, alphaTolerance]], |
| ['Verify rotated blurry shadow 4', 300, 900, [255, 0, 0, 31, alphaTolerance]], |
| ['Verify rotated blurry shadow 5', 500, 900, [255, 0, 0, 31, alphaTolerance]], |
| ]; |
| |
| generate_tests(testPixelAlphaShadow, testPixelAlphaShadowScenarios); |
| |
| </script> |
| </body> |
