| <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN"> |
| <html> |
| <head> |
| <script src="../../resources/js-test-pre.js"></script> |
| </head> |
| <body> |
| <script> |
| description("Ensure correct behavior of canvas with path stroke shadow"); |
| |
| function print(message, color) |
| { |
| var paragraph = document.createElement("div"); |
| paragraph.appendChild(document.createTextNode(message)); |
| paragraph.style.fontFamily = "monospace"; |
| if (color) |
| paragraph.style.color = color; |
| document.getElementById("console").appendChild(paragraph); |
| } |
| |
| // Level of tolerance we expect of most pixel comparisons in this test. |
| function shouldBeAlmost(_a, _b) |
| { |
| shouldBeCloseTo(_a, _b, 2); |
| } |
| |
| var canvas = document.createElement('canvas'); |
| document.body.appendChild(canvas); |
| canvas.setAttribute('width', '700'); |
| canvas.setAttribute('height', '700'); |
| var ctx = canvas.getContext('2d'); |
| |
| ctx.beginPath(); |
| ctx.moveTo(300, 300); |
| ctx.lineTo(300, 50); |
| ctx.bezierCurveTo(200, 40, 75, 150, 30, 30); |
| ctx.quadraticCurveTo(250, 75, 50, 300); |
| ctx.shadowOffsetX = 350; |
| ctx.shadowColor = 'rgba(255, 20, 0, 0.5)'; |
| ctx.shadowBlur = 0; |
| ctx.strokeStyle = 'rgba(0, 0, 255, 1)'; |
| ctx.lineWidth = 30; |
| ctx.closePath(); |
| ctx.stroke(); |
| |
| ctx.beginPath(); |
| ctx.moveTo(300,650); |
| ctx.lineTo(300,400); |
| ctx.bezierCurveTo(200, 390, 75, 500, 30, 380); |
| ctx.quadraticCurveTo(250, 425, 50, 650); |
| ctx.shadowOffsetX = 350; |
| ctx.shadowColor = 'rgba(255, 0, 0, 0.5)'; |
| ctx.shadowBlur = 30; |
| ctx.strokeStyle = 'rgba(0, 0, 255, 1)'; |
| ctx.lineWidth = 30; |
| ctx.closePath(); |
| ctx.stroke(); |
| |
| var imageData, data; |
| |
| // Verify solid shadow. |
| imageData = ctx.getImageData(650, 300, 1, 1); |
| data = imageData.data; |
| shouldBeAlmost('data[0]', 255); |
| shouldBeAlmost('data[1]', 20); |
| shouldBeAlmost('data[2]', 0); |
| |
| imageData = ctx.getImageData(650, 50, 1, 1); |
| data = imageData.data; |
| shouldBeAlmost('data[0]', 255); |
| shouldBeAlmost('data[1]', 20); |
| shouldBeAlmost('data[2]', 0); |
| |
| imageData = ctx.getImageData(380, 30, 1, 1); |
| data = imageData.data; |
| shouldBeAlmost('data[0]', 255); |
| shouldBeAlmost('data[1]', 20); |
| shouldBeAlmost('data[2]', 0); |
| |
| imageData = ctx.getImageData(400, 40, 1, 1); |
| data = imageData.data; |
| shouldBeAlmost('data[0]', 255); |
| shouldBeAlmost('data[1]', 20); |
| shouldBeAlmost('data[2]', 0); |
| |
| // Verify blurry shadow. |
| imageData = ctx.getImageData(640, 640, 1, 1); |
| data = imageData.data; |
| shouldBeAlmost('data[0]', 255); |
| shouldBeAlmost('data[1]', 0); |
| shouldBeAlmost('data[2]', 0); |
| shouldNotBe('data[3]', '255'); |
| |
| imageData = ctx.getImageData(650, 400, 1, 1); |
| data = imageData.data; |
| shouldBeAlmost('data[0]', 255); |
| shouldBeAlmost('data[1]', 0); |
| shouldBeAlmost('data[2]', 0); |
| shouldNotBe('data[3]', '255'); |
| |
| imageData = ctx.getImageData(380, 380, 1, 1); |
| data = imageData.data; |
| shouldBeAlmost('data[0]', 255); |
| shouldBeAlmost('data[1]', 0); |
| shouldBeAlmost('data[2]', 0); |
| shouldNotBe('data[3]', '255'); |
| |
| imageData = ctx.getImageData(350, 380, 1, 1); |
| data = imageData.data; |
| shouldBeAlmost('data[0]', 255); |
| shouldBeAlmost('data[1]', 0); |
| shouldBeAlmost('data[2]', 0); |
| shouldNotBe('data[3]', '255'); |
| </script> |
| <script src="../../resources/js-test-post.js"></script> |
| </body> |
| </html> |
