| <script src="../../resources/testharness.js"></script> |
| <script src="../../resources/testharnessreport.js"></script> |
| <body> |
| <script> |
| async_test(t => { |
| // 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.width = aCanvas.height = 10; |
| var aCtx = aCanvas.getContext('2d'); |
| aCtx.fillStyle = 'rgba(0, 0, 255, 1)'; |
| aCtx.fillRect(0, 0, 50, 50); |
| |
| // Create the image object to be drawn on the master canvas. |
| var img = new Image(); |
| img.onload = drawImageToCanvasAndCheckPixels; |
| img.src = aCanvas.toDataURL(); // set a data URI of the base64 encoded image as the source |
| |
| aCanvas.width = 10; |
| aCtx.fillStyle = 'rgba(0, 0, 255, 0.5)'; |
| aCtx.fillRect(0, 0, 50, 50); |
| // Create the image object to be drawn on the master canvas. |
| var transparentImg = new Image(); |
| transparentImg.onload = drawImageToCanvasAndCheckPixels; |
| transparentImg.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.width = 150; |
| canvas.height = 110; |
| var ctx = canvas.getContext('2d'); |
| |
| function testPixelShadow(x, y, color) |
| { |
| assert_array_equals(ctx.getImageData(x, y, 1, 1).data, color); |
| } |
| |
| function testPixelShadowAlpha(x, y, color) |
| { |
| 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], 10); |
| } |
| |
| var testPixelShadowScenarios = [ |
| ['Verify solid shadow 1', 40, 40, [255, 0, 0, 255]], |
| ['Verify solid shadow 2', 59, 59, [255, 0, 0, 255]], |
| ]; |
| |
| var testPixelShadowAlphaScenarios = [ |
| ['Verify solid alpha shadow 1', 41, 81, [255, 0, 0, 76]], |
| ['Verify solid alpha shadow 2', 59, 99, [255, 0, 0, 76]], |
| |
| ['Verify blurry shadow 1', 90, 39, [255, 0, 0, 114]], |
| ['Verify blurry shadow 2', 90, 60, [255, 0, 0, 114]], |
| ['Verify blurry shadow 3', 79, 50, [255, 0, 0, 114]], |
| ['Verify blurry shadow 4', 100, 50, [255, 0, 0, 114]], |
| |
| ['Verify blurry alpha shadow 1', 90, 79, [255, 0, 0, 34]], |
| ['Verify blurry alpha shadow 2', 90, 100, [255, 0, 0, 34]], |
| ['Verify blurry alpha shadow 3', 79, 90, [255, 0, 0, 34]], |
| ['Verify blurry alpha shadow 4', 100, 90, [255, 0, 0, 34]], |
| |
| ['Verify blurry shadow of image with alpha 1', 130, 39, [255, 0, 0, 57]], |
| ['Verify blurry shadow of image with alpha 2', 130, 60, [255, 0, 0, 57]], |
| ['Verify blurry shadow of image with alpha 3', 119, 50, [255, 0, 0, 57]], |
| ['Verify blurry shadow of image with alpha 4', 140, 50, [255, 0, 0, 57]], |
| |
| ['Verify blurry alpha shadow of image with alpha 1', 130, 79, [255, 0, 0, 17]], |
| ['Verify blurry alpha shadow of image with alpha 2', 130, 100, [255, 0, 0, 17]], |
| ['Verify blurry alpha shadow of image with alpha 3', 119, 90, [255, 0, 0, 17]], |
| ['Verify blurry alpha shadow of image with alpha 4', 140, 90, [255, 0, 0, 17]], |
| ]; |
| |
| var imagesLoaded = 0; |
| function drawImageToCanvasAndCheckPixels() { |
| imagesLoaded = imagesLoaded + 1; |
| if (imagesLoaded == 2) { |
| ctx.scale(2, 2); |
| ctx.shadowOffsetX = 20; |
| ctx.shadowOffsetY = 20; |
| ctx.fillStyle = 'rgba(0, 0, 255, 1)'; |
| |
| ctx.shadowColor = 'rgba(255, 0, 0, 1.0)'; |
| ctx.drawImage(img, 10, 10); |
| |
| ctx.shadowColor = 'rgba(255, 0, 0, 0.3)'; |
| ctx.drawImage(img, 10, 30); |
| |
| ctx.shadowColor = 'rgba(255, 0, 0, 1.0)'; |
| ctx.shadowBlur = 10; |
| ctx.drawImage(img, 30, 10); |
| |
| ctx.shadowColor = 'rgba(255, 0, 0, 0.3)'; |
| ctx.drawImage(img, 30, 30); |
| |
| ctx.shadowColor = 'rgba(255, 0, 0, 1.0)'; |
| ctx.drawImage(transparentImg, 50, 10); |
| |
| ctx.shadowColor = 'rgba(255, 0, 0, 0.3)'; |
| ctx.drawImage(transparentImg, 50, 30); |
| |
| t.step(runTests); |
| t.done(); |
| |
| } |
| } |
| |
| function runTests() { |
| for (var i = 0; i < testPixelShadowScenarios.length; i++) |
| testPixelShadow(testPixelShadowScenarios[i][1], |
| testPixelShadowScenarios[i][2], |
| testPixelShadowScenarios[i][3]); |
| |
| for (var i = 0; i < testPixelShadowAlphaScenarios.length; i++) |
| testPixelShadowAlpha(testPixelShadowAlphaScenarios[i][1], |
| testPixelShadowAlphaScenarios[i][2], |
| testPixelShadowAlphaScenarios[i][3]); |
| } |
| |
| }, 'Ensure correct behavior of canvas with drawImage+shadow after scaling. A blue and red checkered pattern should be displayed.'); |
| </script> |
| </body> |
