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var gImage1;
var gImage2;
var gImageBitmap1;
var gImageBitmap2;
// Bug 1239752.
var gImageData;
var gImageBitmap3;
function comparePixelColor(testImgageData, groundTruthImageData, x, y, tolerance, info) {
ok(testImgageData.width == groundTruthImageData.width && testImgageData.height == groundTruthImageData.height,
"testImgageData and groundTruthImageData should have the same dimension.");
var index = (groundTruthImageData.width * y + x) * 4;
var r = groundTruthImageData.data[index + 0];
var g = groundTruthImageData.data[index + 1];
var b = groundTruthImageData.data[index + 2];
var a = groundTruthImageData.data[index + 3];
var newR = testImgageData.data[index + 0];
var newG = testImgageData.data[index + 1];
var newB = testImgageData.data[index + 2];
var newA = testImgageData.data[index + 3];
var isTheSame = Math.abs(r - newR) <= tolerance &&
Math.abs(g - newG) <= tolerance &&
Math.abs(b - newB) <= tolerance &&
Math.abs(a - newA) <= tolerance;
ok(isTheSame, "[" + info + "] " +
"newImageData(" + newR + "," + newG + "," + newB + "," + newA +
") should equal to imageData(" + r + "," + g + "," + b + "," + a + ").");
}
function compareImageBitmapWithImageElement(imageBitmap, imageElement) {
var canvas1 = document.createElement('canvas');
var canvas2 = document.createElement('canvas');
canvas1.width = imageElement.naturalWidth;
canvas1.height = imageElement.naturalHeight;
canvas2.width = imageElement.naturalWidth;
canvas2.height = imageElement.naturalHeight;
var ctx1 = canvas1.getContext('2d');
var ctx2 = canvas2.getContext('2d');
ctx1.drawImage(imageElement, 0, 0);
ctx2.drawImage(imageBitmap, 0, 0);
document.body.appendChild(canvas1);
document.body.appendChild(canvas2);
var imageData1 = ctx1.getImageData(0, 0, canvas1.width, canvas1.height);
var imageData2 = ctx2.getImageData(0, 0, canvas2.width, canvas2.height);
// Create an array of pixels that is going to be tested.
var pixels = [];
var xGap = imageElement.naturalWidth / 4;
var yGap = imageElement.naturalHeight / 4;
for (var y = 0; y < imageElement.naturalHeight; y += yGap) {
for (var x = 0; x < imageElement.naturalWidth; x += xGap) {
pixels.push({"x":x, "y":y});
}
}
// Also, put the button-right pixel into pixels.
pixels.push({"x":imageElement.naturalWidth-1, "y":imageElement.naturalHeight-1});
// Do the test.
for (var pixel of pixels) {
comparePixelColor(imageData2, imageData1, pixel.x, pixel.y, 0);
}
}
function compareImageBitmapWithImageData(imageBitmap, imageData, info) {
var canvas1 = document.createElement('canvas');
canvas1.width = imageBitmap.width;
canvas1.height = imageBitmap.height;
var ctx1 = canvas1.getContext('2d');
ctx1.drawImage(imageBitmap, 0, 0);
document.body.appendChild(canvas1);
var imageData1 = ctx1.getImageData(0, 0, canvas1.width, canvas1.height);
// Create an array of pixels that is going to be tested.
var pixels = [];
var xGap = imageBitmap.width / 4;
var yGap = imageBitmap.height / 4;
for (var y = 0; y < imageBitmap.height; y += yGap) {
for (var x = 0; x < imageBitmap.width; x += xGap) {
pixels.push({"x":x, "y":y});
}
}
// Also, put the button-right pixel into pixels.
pixels.push({"x":imageBitmap.width-1, "y":imageBitmap.height-1});
// Do the test.
for (var pixel of pixels) {
comparePixelColor(imageData1, imageData, pixel.x, pixel.y, 5, info);
}
}
function prepareImageBitmaps() {
gImage1 = document.createElement('img');
gImage2 = document.createElement('img');
gImage1.src = "image_rgrg-256x256.png";
gImage2.src = "image_yellow.png";
var p1 = new Promise(function(resolve, reject) {
gImage1.onload = function() {
var promise = createImageBitmap(gImage1);
promise.then(function(bitmap) {
gImageBitmap1 = bitmap;
resolve(true);
});
}
});
var p2 = new Promise(function(resolve, reject) {
gImage2.onload = function() {
var promise = createImageBitmap(gImage2);
promise.then(function(bitmap) {
gImageBitmap2 = bitmap;
resolve(true);
});
}
});
var p3 = new Promise(function(resolve, reject) {
// Create an ImageData with random colors.
var width = 5;
var height = 10;
var data = [43,143,24,148, 235,165,179,91, 74,228,75,195, 141,109,74,65, 25,177,3,201,
128,105,12,199, 196,93,241,131, 250,121,232,189, 175,131,216,190, 145,123,167,70,
18,196,210,162, 225,1,90,188, 223,216,182,233, 118,50,168,56, 51,206,198,199,
153,29,70,130, 180,135,135,51, 148,46,44,144, 80,171,142,95, 25,178,102,110,
0,28,128,91, 31,222,42,170, 85,8,218,146, 65,30,198,238, 121,57,124,88,
246,40,141,146, 174,195,255,149, 30,153,92,116, 18,241,6,111, 39,162,85,143,
237,159,201,244, 93,68,14,246, 143,143,83,221, 187,215,243,154, 24,125,221,53,
80,153,151,219, 202,241,250,191, 153,129,181,57, 94,18,136,231, 41,252,168,207,
213,103,118,172, 53,213,184,204, 25,29,249,199, 101,55,49,167, 25,23,173,78,
19,234,205,155, 250,175,44,201, 215,92,25,59, 25,29,249,199, 153,129,181,57];
gImageData = new ImageData(new Uint8ClampedArray(data), width, height);
// Create an ImageBitmap from the above ImageData.
createImageBitmap(gImageData).then(
(bitmap) => { gImageBitmap3 = bitmap; resolve(true); },
() => { reject(); }
);
});
return Promise.all([p1, p2, p3]);
}
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