| <!DOCTYPE HTML> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script> |
| function checkNoCrop(imageBitmap) |
| { |
| var canvas = document.createElement("canvas"); |
| canvas.width = 50; |
| canvas.height = 50; |
| var ctx = canvas.getContext("2d"); |
| ctx.clearRect(0, 0, canvas.width, canvas.height); |
| ctx.drawImage(imageBitmap, 0, 0); |
| var d = ctx.getImageData(0, 0, 1, 1).data; |
| assert_array_equals(d, [255, 0, 0, 255], "This pixel should be red."); |
| d = ctx.getImageData(39, 0, 1, 1).data; |
| assert_array_equals(d, [0, 255, 0, 255], "This pixel should be green."); |
| d = ctx.getImageData(0, 39, 1, 1).data; |
| assert_array_equals(d, [0, 0, 255, 255], "This pixel should be blue."); |
| d = ctx.getImageData(39, 39, 1, 1).data; |
| assert_array_equals(d, [0, 0, 0, 255], "This pixel should be black."); |
| d = ctx.getImageData(41, 41, 1, 1).data; |
| assert_array_equals(d, [0, 0, 0, 0], "This pixel should be transparent black."); |
| } |
| |
| function checkCrop(imageBitmap) |
| { |
| var canvas = document.createElement("canvas"); |
| canvas.width = 50; |
| canvas.height = 50; |
| var ctx = canvas.getContext("2d"); |
| ctx.clearRect(0, 0, canvas.width, canvas.height); |
| ctx.drawImage(imageBitmap, 0, 0); |
| var d = ctx.getImageData(0, 0, 1, 1).data; |
| assert_array_equals(d, [255, 0, 0, 255], "This pixel should be red."); |
| d = ctx.getImageData(19, 0, 1, 1).data; |
| assert_array_equals(d, [0, 255, 0, 255], "This pixel should be green."); |
| d = ctx.getImageData(0, 19, 1, 1).data; |
| assert_array_equals(d, [0, 0, 255, 255], "This pixel should be blue."); |
| d = ctx.getImageData(19, 19, 1, 1).data; |
| assert_array_equals(d, [0, 0, 0, 255], "This pixel should be black."); |
| d = ctx.getImageData(21, 21, 1, 1).data; |
| assert_array_equals(d, [0, 0, 0, 0], "This pixel should be transparent black."); |
| } |
| |
| function compareBitmaps(bitmap1, bitmap2) |
| { |
| var canvas1 = document.createElement("canvas"); |
| var canvas2 = document.createElement("canvas"); |
| canvas1.width = 50; |
| canvas1.height = 50; |
| canvas2.width = 50; |
| canvas2.height = 50; |
| var ctx1 = canvas1.getContext("2d"); |
| var ctx2 = canvas2.getContext("2d"); |
| ctx1.clearRect(0, 0, canvas1.width, canvas1.height); |
| ctx2.clearRect(0, 0, canvas2.width, canvas2.height); |
| ctx1.drawImage(bitmap1, 0, 0); |
| ctx2.drawImage(bitmap2, 0, 0); |
| var data1 = ctx1.getImageData(0, 0, 50, 50).data; |
| var data2 = ctx2.getImageData(0, 0, 50, 50).data; |
| var dataMatched = true; |
| for (var i = 0; i < data1.length; i++) { |
| if (data1[i] != data2[i]) { |
| dataMatched = false; |
| break; |
| } |
| } |
| assert_false(dataMatched); |
| } |
| |
| function testImageBitmap(source) |
| { |
| return Promise.all([ |
| createImageBitmap(source, {resizeWidth: 40, resizeHeight: 40, resizeQuality: "high"}), |
| createImageBitmap(source, {resizeWidth: 40, resizeHeight: 40, resizeQuality: "medium"}), |
| createImageBitmap(source, {resizeWidth: 40, resizeHeight: 40, resizeQuality: "low"}), |
| createImageBitmap(source, {resizeWidth: 40, resizeHeight: 40, resizeQuality: "pixelated"}), |
| createImageBitmap(source, 5, 5, 10, 10, {resizeWidth: 20, resizeHeight: 20, resizeQuality: "high"}), |
| createImageBitmap(source, 5, 5, 10, 10, {resizeWidth: 20, resizeHeight: 20, resizeQuality: "medium"}), |
| createImageBitmap(source, 5, 5, 10, 10, {resizeWidth: 20, resizeHeight: 20, resizeQuality: "low"}), |
| createImageBitmap(source, 5, 5, 10, 10, {resizeWidth: 20, resizeHeight: 20, resizeQuality: "pixelated"}), |
| ]).then(([noCropHigh, noCropMedium, noCropLow, noCropPixelated, cropHigh, cropMedium, cropLow, cropPixelated]) => { |
| checkNoCrop(noCropHigh); |
| checkNoCrop(noCropMedium); |
| checkNoCrop(noCropLow); |
| checkNoCrop(noCropPixelated); |
| checkCrop(cropHigh); |
| checkCrop(cropMedium); |
| checkCrop(cropLow); |
| checkCrop(cropPixelated); |
| // Brute-force comparison among all bitmaps is too expensive |
| compareBitmaps(noCropHigh, noCropMedium); |
| compareBitmaps(noCropLow, noCropPixelated); |
| compareBitmaps(cropHigh, cropMedium); |
| compareBitmaps(cropLow, cropPixelated); |
| }); |
| } |
| |
| function initializeTestCanvas() |
| { |
| var testCanvas = document.createElement("canvas"); |
| testCanvas.width = 20; |
| testCanvas.height = 20; |
| var testCtx = testCanvas.getContext("2d"); |
| testCtx.fillStyle = "rgb(255, 0, 0)"; |
| testCtx.fillRect(0, 0, 10, 10); |
| testCtx.fillStyle = "rgb(0, 255, 0)"; |
| testCtx.fillRect(10, 0, 10, 10); |
| testCtx.fillStyle = "rgb(0, 0, 255)"; |
| testCtx.fillRect(0, 10, 10, 10); |
| testCtx.fillStyle = "rgb(0, 0, 0)"; |
| testCtx.fillRect(10, 10, 10, 10); |
| return testCanvas; |
| } |
| |
| // Blob |
| promise_test(function() { |
| return new Promise((resolve, reject) => { |
| var xhr = new XMLHttpRequest(); |
| xhr.open("GET", '/images/pattern.png'); |
| xhr.responseType = 'blob'; |
| xhr.send(); |
| xhr.onload = function() { |
| resolve(xhr.response); |
| }; |
| }).then(testImageBitmap); |
| }, 'createImageBitmap from a Blob with resize option.'); |
| |
| // HTMLCanvasElement |
| promise_test(function() { |
| var testCanvas = initializeTestCanvas(); |
| return testImageBitmap(testCanvas); |
| }, 'createImageBitmap from a HTMLCanvasElement with resize option.'); |
| |
| // HTMLImageElement |
| promise_test(function() { |
| return new Promise((resolve, reject) => { |
| var image = new Image(); |
| image.onload = function() { |
| resolve(image); |
| } |
| image.src = '/images/pattern.png' |
| }).then(testImageBitmap); |
| }, 'createImageBitmap from a HTMLImageElement with resize option.'); |
| |
| // ImageBitmap |
| promise_test(function() { |
| var testCanvas = initializeTestCanvas(); |
| return createImageBitmap(testCanvas).then(testImageBitmap); |
| }, 'createImageBitmap from an ImageBitmap with resize option.'); |
| |
| // ImageData |
| promise_test(function() { |
| var canvas = initializeTestCanvas(); |
| var ctx = canvas.getContext("2d"); |
| var data = ctx.getImageData(0, 0, 20, 20); |
| return testImageBitmap(data); |
| }, 'createImageBitmap from an ImageData with resize option.'); |
| </script> |