| <script src="../../resources/testharness.js"></script> |
| <script src="../../resources/testharnessreport.js"></script> |
| <body> |
| <script> |
| |
| // Create auxiliary canvas to draw to and create an image from. |
| // This is done instead of simply loading an image from the file system |
| // because that would throw a SECURITY_ERR DOM Exception. |
| var aCanvas = document.createElement('canvas'); |
| aCanvas.setAttribute('width', '200'); |
| aCanvas.setAttribute('height', '200'); |
| var aCtx = aCanvas.getContext('2d'); |
| |
| // Draw a circle on the same canvas. |
| aCtx.beginPath(); |
| aCtx.fillStyle = 'blue'; |
| aCtx.arc(100, 100, 100, 0, Math.PI * 2, false); |
| aCtx.fill(); |
| |
| // Create the image object to be drawn on the master canvas. |
| var img = new Image(); |
| img.src = aCanvas.toDataURL(); // set a data URI of the base64 encoded image as the source |
| |
| // Create master canvas. |
| var canvas = document.createElement('canvas'); |
| document.body.appendChild(canvas); |
| canvas.setAttribute('width', '700'); |
| canvas.setAttribute('height', '1100'); |
| var ctx = canvas.getContext('2d'); |
| |
| function drawImageToCanvasAndCheckPixels() { |
| ctx.shadowOffsetX = 250; |
| ctx.fillStyle = ctx.createPattern(img, 'repeat'); |
| |
| ctx.shadowColor = 'rgba(255, 0, 0, 1.0)'; |
| ctx.fillRect(50, 50, 200, 200); |
| |
| ctx.shadowColor = 'rgba(255, 0, 0, 0.2)'; |
| ctx.fillRect(50, 300, 200, 200); |
| |
| ctx.shadowBlur = 10; |
| ctx.shadowColor = 'rgba(255, 0, 0, 1.0)'; |
| ctx.fillRect(50, 550, 200, 200); |
| |
| ctx.shadowColor = 'rgba(255, 0, 0, 0.2)'; |
| ctx.fillRect(50, 800, 200, 200); |
| |
| checkPixels(); |
| } |
| |
| function checkPixels() { |
| var imageData, data; |
| |
| // Verify solid shadow. |
| imageData = ctx.getImageData(300, 50, 1, 1); |
| d = imageData.data; |
| assert_equals(d[0], 255); |
| assert_equals(d[1], 0); |
| assert_equals(d[2], 0); |
| assert_equals(d[3], 255); |
| |
| imageData = ctx.getImageData(300, 249, 1, 1); |
| d = imageData.data; |
| assert_equals(d[0], 255); |
| assert_equals(d[1], 0); |
| assert_equals(d[2], 0); |
| assert_equals(d[3], 255); |
| |
| imageData = ctx.getImageData(490, 240, 1, 1); |
| d = imageData.data; |
| assert_equals(d[0], 255); |
| assert_equals(d[1], 0); |
| assert_equals(d[2], 0); |
| assert_equals(d[3], 255); |
| |
| // Verify solid alpha shadow. |
| imageData = ctx.getImageData(310, 350, 1, 1); |
| d = imageData.data; |
| assert_equals(d[0], 255); |
| assert_equals(d[1], 0); |
| assert_equals(d[2], 0); |
| assert_approx_equals(d[3], 51, 10); |
| |
| imageData = ctx.getImageData(490, 490, 1, 1); |
| d = imageData.data; |
| assert_equals(d[0], 255); |
| assert_equals(d[1], 0); |
| assert_equals(d[2], 0); |
| assert_approx_equals(d[3], 51, 10); |
| |
| imageData = ctx.getImageData(300, 499, 1, 1); |
| d = imageData.data; |
| assert_equals(d[0], 255); |
| assert_equals(d[1], 0); |
| assert_equals(d[2], 0); |
| assert_approx_equals(d[3], 51, 10); |
| |
| // Verify blurry shadow. |
| imageData = ctx.getImageData(310, 550, 1, 1); |
| d = imageData.data; |
| assert_equals(d[0], 255); |
| assert_equals(d[1], 0); |
| assert_equals(d[2], 0); |
| assert_approx_equals(d[3], 141, 10); |
| |
| imageData = ctx.getImageData(490, 750, 1, 1); |
| d = imageData.data; |
| assert_equals(d[0], 255); |
| assert_equals(d[1], 0); |
| assert_equals(d[2], 0); |
| assert_approx_equals(d[3], 113, 10); |
| |
| imageData = ctx.getImageData(499, 499, 1, 1); |
| d = imageData.data; |
| assert_equals(d[0], 255); |
| assert_equals(d[1], 0); |
| assert_equals(d[2], 0); |
| assert_approx_equals(d[3], 51, 10); |
| |
| // Verify blurry alpha shadow. |
| imageData = ctx.getImageData(300, 850, 1, 1); |
| d = imageData.data; |
| assert_equals(d[0], 255); |
| assert_equals(d[1], 0); |
| assert_equals(d[2], 0); |
| assert_approx_equals(d[3], 29, 10); |
| |
| imageData = ctx.getImageData(500, 875, 1, 1); |
| d = imageData.data; |
| assert_equals(d[0], 255); |
| assert_equals(d[1], 0); |
| assert_equals(d[2], 0); |
| assert_approx_equals(d[3], 23, 10); |
| |
| imageData = ctx.getImageData(300, 900, 1, 1); |
| d = imageData.data; |
| assert_equals(d[0], 255); |
| assert_equals(d[1], 0); |
| assert_equals(d[2], 0); |
| assert_approx_equals(d[3], 29, 10); |
| } |
| |
| async_test(t => { |
| img.onload = function() { |
| t.step(drawImageToCanvasAndCheckPixels); |
| t.done(); |
| } |
| }, "Ensure correct behavior of canvas with createPattern + fillRect with shadow."); |
| </script> |
| </body> |
