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<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN">
<html>
<head>
<script src="../../resources/js-test.js"></script>
</head>
<body>
<script>
description("Ensure correct behavior of drawImage with ImageBitmaps.");
window.jsTestIsAsync = true;
function jsWrapperClass(node)
{
// returns the ClassName of node
if (!node)
return "[null]";
var string = Object.prototype.toString.apply(node);
// string will be of the form [object ClassName]
return string.substr(8, string.length - 9);
}
function shouldBeType(expression, className)
{
shouldBe("jsWrapperClass(" + expression + ")", "'" + className + "'");
}
function shouldNotBeCalled() {
testFailed("createImageBitmap promise rejected.");
finishJSTest();
}
function shouldBeRed(x, y) {
d = ctx.getImageData(x, y, 1, 1).data;
shouldBe("d[0]", "255");
shouldBe("d[1]", "0");
shouldBe("d[2]", "0");
shouldBe("d[3]", "255");
}
function shouldBeGreen(x, y) {
d = ctx.getImageData(x, y, 1, 1).data;
shouldBe("d[0]", "0");
shouldBe("d[1]", "255");
shouldBe("d[2]", "0");
shouldBe("d[3]", "255");
}
function shouldBeBlue(x, y) {
d = ctx.getImageData(x, y, 1, 1).data;
shouldBe("d[0]", "0");
shouldBe("d[1]", "0");
shouldBe("d[2]", "255");
shouldBe("d[3]", "255");
}
function shouldBeBlack(x, y) {
d = ctx.getImageData(x, y, 1, 1).data;
shouldBe("d[0]", "0");
shouldBe("d[1]", "0");
shouldBe("d[2]", "0");
shouldBe("d[3]", "255");
}
function shouldBeClear(x, y) {
// should be transparent black pixels
d = ctx.getImageData(x, y, 1, 1).data;
shouldBe("d[0]", "0");
shouldBe("d[1]", "0");
shouldBe("d[2]", "0");
shouldBe("d[3]", "0");
}
function drawPattern(ctx) {
// Draw a four-color pattern
ctx.beginPath();
ctx.fillStyle = "rgb(255, 0, 0)";
ctx.fillRect(0, 0, 10, 10);
ctx.fillStyle = "rgb(0, 255, 0)";
ctx.fillRect(10, 0, 10, 10);
ctx.fillStyle = "rgb(0, 0, 255)";
ctx.fillRect(0, 10, 10, 10);
ctx.fillStyle = "rgb(0, 0, 0)";
ctx.fillRect(10, 10, 10, 10);
}
function clearContext(context) {
context.clearRect(0, 0, 50, 50);
}
var bitmap;
var image;
var testBitmap; // this is an ImageBitmap that is uncropped. We use this to test createImageBitmap(testBitmap)
var d; // image.imageData
var elements;
var imageWidth = 20;
var imageHeight = 20;
// Draw to an auxillary canvas.
var aCanvas = document.createElement("canvas");
aCanvas.width = imageWidth;
aCanvas.height = imageHeight;
var aCtx = aCanvas.getContext("2d");
drawPattern(aCtx);
var canvas = document.createElement("canvas");
canvas.setAttribute("width", "50");
canvas.setAttribute("height", "50");
var ctx = canvas.getContext("2d");
image = new Image();
image.onload = imageLoaded;
image.src = aCanvas.toDataURL();
var imageLoaded = false;
var imageBitmapLoaded = false;
var blobLoaded = false;
function imageLoaded() {
createImageBitmap(image).then(imageBitmapLoadedCallback, shouldNotBeCalled);
d = aCtx.getImageData(0, 0, 20, 20);
imageLoaded = true;
loaded();
}
function imageBitmapLoadedCallback(imageBitmap) {
testBitmap = imageBitmap;
shouldBe("testBitmap.width", "imageWidth");
shouldBe("testBitmap.height", "imageHeight");
// width and height are readonly
testBitmap.width = 42;
testBitmap.height = 42;
shouldBe("testBitmap.width", "imageWidth");
shouldBe("testBitmap.height", "imageHeight");
imageBitmapLoaded = true;
loaded();
}
var xhr = new XMLHttpRequest();
xhr.open("GET", 'resources/pattern.png');
xhr.responseType = 'blob';
xhr.send();
xhr.onload = function() {
blob = xhr.response;
blobLoaded = true;
loaded();
}
function loaded() {
if (imageLoaded && imageBitmapLoaded && blobLoaded) {
// check all of these elements
elements = [image, aCanvas, d, testBitmap, blob];
// wait for callback to finish before each check to ensure synchronous behavior
nextCheck(0);
}
}
function nextCheck(elementIndex) {
if (elementIndex == elements.length) {
finishJSTest();
return;
}
var element = elements[elementIndex];
imageBitmaps = {};
debug("Checking " + jsWrapperClass(element) + ".");
var p1 = createImageBitmap(element).then(function (image) { imageBitmaps.noCrop = image });
var p2 = createImageBitmap(element, 0, 0, 10, 10).then(function (image) { imageBitmaps.crop = image });
var p3 = createImageBitmap(element, 5, 5, 10, 10).then(function (image) { imageBitmaps.cropCenter = image });
var p4 = createImageBitmap(element, 10, 10, 10, 10).then(function (image) { imageBitmaps.cropRight = image });
var p5 = createImageBitmap(element, -10, -10, 60, 60).then(function (image) { imageBitmaps.overCrop = image });
var p6 = createImageBitmap(element, 10, 10, 50, 50).then(function (image) { imageBitmaps.overCropRight = image });
var p7 = createImageBitmap(element, 10, 10, -10, -10).then(function (image) { imageBitmaps.negativeCrop = image });
var p8 = createImageBitmap(element, -30, -30, 30, 30).then(function (image) { imageBitmaps.empty = image });
var p9 = createImageBitmap(element, 40, 30, 30, 30).then(function (image) { imageBitmaps.emptyTwo = image });
Promise.all([p1, p2, p3, p4, p5, p6, p7, p8, p9]).then(function() {
checkNoCrop(imageBitmaps.noCrop);
checkCrop(imageBitmaps.crop);
checkCropCenter(imageBitmaps.cropCenter);
checkCropRight(imageBitmaps.cropRight);
checkOverCrop(imageBitmaps.overCrop);
checkOverCropRight(imageBitmaps.overCropRight);
checkCrop(imageBitmaps.negativeCrop);
checkEmpty(imageBitmaps.empty);
checkEmpty(imageBitmaps.emptyTwo);
nextCheck(elementIndex + 1);
}, shouldNotBeCalled);
}
function checkNoCrop(imageBitmap) {
debug("Check no crop.");
bitmap = imageBitmap;
shouldBeType("bitmap", "ImageBitmap");
shouldBe("bitmap.width", "imageWidth");
shouldBe("bitmap.height", "imageHeight");
// should be drawn to (0, 0), (20, 20)
clearContext(ctx);
ctx.drawImage(imageBitmap, 0, 0);
shouldBeRed(9, 9);
shouldBeGreen(11, 9);
shouldBeBlue(9, 11);
shouldBeBlack(11, 11);
shouldBeBlack(19, 19);
shouldBeClear(1, 21);
shouldBeClear(21, 1);
shouldBeClear(21, 21);
// shrunk to (0, 0), (10, 10)
clearContext(ctx);
ctx.drawImage(imageBitmap, 0, 0, 10, 10);
shouldBeRed(4, 4);
shouldBeGreen(6, 4);
shouldBeBlue(4, 6);
shouldBeBlack(6, 6);
shouldBeBlack(9, 9);
shouldBeClear(1, 11);
shouldBeClear(11, 1);
shouldBeClear(11, 11);
// shrunk to (10, 10), (20, 20)
clearContext(ctx);
ctx.drawImage(imageBitmap, 10, 10, 10, 10);
shouldBeRed(14, 14);
shouldBeGreen(16, 14);
shouldBeBlue(14, 16);
shouldBeBlack(16, 16);
shouldBeBlack(19, 19);
shouldBeClear(11, 21);
shouldBeClear(21, 11);
shouldBeClear(21, 21);
// black should be drawn to (10, 10), (20, 20)
clearContext(ctx);
ctx.drawImage(imageBitmap, 10, 10, 10, 10, 10, 10, 10, 10);
shouldBeClear(9, 9);
shouldBeBlack(11, 11);
shouldBeBlack(19, 19);
shouldBeClear(1, 21);
shouldBeClear(21, 1);
shouldBeClear(21, 21);
}
function checkCrop(imageBitmap) {
debug("Check crop.");
bitmap = imageBitmap;
shouldBeType("bitmap", "ImageBitmap");
shouldBe("bitmap.width", "10");
shouldBe("bitmap.height", "10");
// red should be drawn to (0, 0), (10, 10)
clearContext(ctx);
ctx.drawImage(imageBitmap, 0, 0);
shouldBeRed(1, 1);
shouldBeRed(9, 9);
shouldBeClear(12, 12);
shouldBeClear(1, 12);
shouldBeClear(12, 1);
// red should be drawn to (0, 0), (20, 20)
clearContext(ctx);
ctx.drawImage(imageBitmap, 0, 0, 20, 20);
shouldBeRed(1, 1);
shouldBeRed(18, 18);
shouldBeClear(22, 22);
shouldBeClear(1, 22);
shouldBeClear(22, 1);
}
function checkCropCenter(imageBitmap) {
debug("Check crop center.");
bitmap = imageBitmap;
shouldBeType("bitmap", "ImageBitmap");
shouldBe("bitmap.width", "10");
shouldBe("bitmap.height", "10");
// should be drawn to (0, 0), (10, 10) with all four colors
clearContext(ctx);
ctx.drawImage(imageBitmap, 0, 0);
shouldBeRed(4, 4);
shouldBeGreen(6, 4);
shouldBeBlue(4, 6);
shouldBeBlack(6, 6);
shouldBeBlack(9, 9);
shouldBeClear(11, 11);
shouldBeClear(1, 11);
shouldBeClear(11, 1);
// should be drawn to (0, 0), (20, 20) with all four colors
clearContext(ctx);
ctx.drawImage(imageBitmap, 0, 0, 20, 20);
shouldBeRed(8, 8);
shouldBeGreen(11, 8);
shouldBeBlue(8, 11);
shouldBeBlack(11, 11);
shouldBeBlack(18, 18);
shouldBeClear(22, 22);
shouldBeClear(1, 21);
shouldBeClear(21, 1);
}
function checkCropRight(imageBitmap) {
debug("Check crop right.");
bitmap = imageBitmap;
shouldBeType("bitmap", "ImageBitmap");
shouldBe("bitmap.width", "10");
shouldBe("bitmap.height", "10");
// black should be drawn to (0, 0), (10, 10)
clearContext(ctx);
ctx.drawImage(imageBitmap, 0, 0);
shouldBeBlack(1, 1);
shouldBeBlack(9, 9);
shouldBeClear(11, 11);
shouldBeClear(1, 11);
shouldBeClear(11, 1);
}
function checkOverCrop(imageBitmap) {
debug("Check over crop.");
bitmap = imageBitmap;
shouldBeType("bitmap", "ImageBitmap");
shouldBe("bitmap.width", "60");
shouldBe("bitmap.height", "60");
// should be drawn to (10, 10), (30, 30)
clearContext(ctx);
ctx.drawImage(imageBitmap, 0, 0);
shouldBeClear(1, 1);
shouldBeClear(9, 9);
shouldBeRed(11, 11);
shouldBeRed(19, 19);
shouldBeGreen(21, 19);
shouldBeBlue(19, 21);
shouldBeBlack(21, 21);
shouldBeBlack(29, 29);
shouldBeClear(32, 1);
shouldBeClear(1, 32);
shouldBeClear(32, 32);
// should be drawn to (5, 5), (15, 15)
clearContext(ctx);
ctx.drawImage(imageBitmap, 0, 0, 30, 30);
shouldBeClear(1, 1);
shouldBeClear(4, 4);
shouldBeRed(6, 6);
shouldBeRed(9, 9);
shouldBeGreen(11, 9);
shouldBeBlue(9, 11);
shouldBeBlack(11, 11);
shouldBeBlack(14, 14);
shouldBeClear(16, 1);
shouldBeClear(1, 16);
shouldBeClear(16, 16);
}
function checkOverCropRight(imageBitmap) {
debug("Check over crop right.");
bitmap = imageBitmap;
shouldBe("bitmap.width", "50");
shouldBe("bitmap.height", "50");
// black should be drawn to (0, 0), (10, 10)
clearContext(ctx);
ctx.drawImage(imageBitmap, 0, 0);
shouldBeBlack(1, 1);
shouldBeBlack(9, 9);
shouldBeClear(11, 11);
shouldBeClear(1, 11);
shouldBeClear(11, 1);
// black should be drawn to (0, 0), (4, 4)
clearContext(ctx);
ctx.drawImage(imageBitmap, 0, 0, 20, 20);
shouldBeBlack(1, 1);
shouldBeBlack(3, 3);
shouldBeClear(5, 5);
shouldBeClear(1, 5);
shouldBeClear(5, 1);
// nothing should be drawn
clearContext(ctx);
ctx.drawImage(imageBitmap, 10, 10, 20, 20, 0, 0, 20, 20);
shouldBeClear(1, 1);
shouldBeClear(3, 3);
shouldBeClear(5, 5);
shouldBeClear(1, 5);
shouldBeClear(5, 1);
}
function checkEmpty(imageBitmap) {
debug("Check empty.");
bitmap = imageBitmap;
shouldBeType("bitmap", "ImageBitmap");
shouldBe("bitmap.width", "30");
shouldBe("bitmap.height", "30");
// nothing should be drawn
clearContext(ctx);
ctx.drawImage(imageBitmap, 0, 0);
shouldBeClear(1, 1);
shouldBeClear(9, 9);
shouldBeClear(11, 11);
shouldBeClear(22, 22);
}
</script>
</body>
</html>
|
