<!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", 'resources/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 = 'resources/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>
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