| <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN"> |
| <html> |
| <head> |
| <script src="../../resources/js-test-pre.js"></script> |
| </head> |
| <body> |
| <script> |
| description("Test for canvas regression where gradient clips were not cleared https://bugs.webkit.org/show_bug.cgi?id=21498") |
| |
| function pixelValueAt(context, x, y) { |
| var imageData = context.getImageData(x, y, 1, 1); |
| return imageData.data; |
| } |
| |
| function pixelToString(p) { |
| return "[" + p[0] + ", " + p[1] + ", " + p[2] + ", " + p[3] + "]" |
| } |
| |
| function pixelShouldBe(context, x, y, expectedPixelString) { |
| var pixel = pixelValueAt(context, x, y); |
| var expectedPixel = eval(expectedPixelString); |
| |
| var pixelString = "pixel " + x + ", " + y; |
| if (areArraysEqual(pixel, expectedPixel)) { |
| testPassed(pixelString + " is " + pixelToString(pixel)); |
| } else { |
| testFailed(pixelString + " should be " + pixelToString(expectedPixel) + " was " + pixelToString(pixel)); |
| } |
| } |
| |
| function fillWithColor(context, color) { |
| context.save(); |
| context.fillStyle = color; |
| context.fillRect(0, 0, canvas.width, canvas.height); |
| context.restore(); |
| } |
| |
| var canvas = document.createElement("canvas"); |
| canvas.height = 100; |
| canvas.width = 100; |
| canvas.style.height = "100"; |
| canvas.style.width = "100"; |
| |
| document.body.appendChild(canvas); |
| |
| var greenImage = document.createElement("canvas"); |
| greenImage.height = 10; |
| greenImage.width = 10; |
| var greenCtx = greenImage.getContext('2d'); |
| fillWithColor(greenCtx, "green"); |
| var greenPixel = pixelValueAt(greenCtx, 0, 0); |
| |
| |
| var ctx = canvas.getContext('2d'); |
| var gradient = ctx.createLinearGradient(0, 0, 10, 0); |
| gradient.addColorStop(0, "blue"); |
| gradient.addColorStop(1, "red"); |
| ctx.fillStyle = gradient; |
| ctx.beginPath(); |
| ctx.moveTo(0, 0); |
| ctx.lineTo(10, 5); |
| ctx.lineTo(10, 10); |
| ctx.lineTo(5, 10); |
| ctx.closePath(); |
| ctx.fill(); |
| |
| ctx.fillStyle = "green"; |
| ctx.fillRect(20, 20, 10, 10); |
| |
| pixelShouldBe(ctx, 20, 20, "greenPixel"); |
| </script> |
| <script src="../../resources/js-test-post.js"></script> |
| </body> |
| </html> |
