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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 createPattern 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;
shouldBeTrue("d[0] == 255");
shouldBeTrue("d[1] == 0");
shouldBeTrue("d[2] == 0");
shouldBeTrue("d[3] == 255");
}
function shouldBeGreen(x, y) {
d = ctx.getImageData(x, y, 1, 1).data;
shouldBeTrue("d[0] == 0");
shouldBeTrue("d[1] == 255");
shouldBeTrue("d[2] == 0");
shouldBeTrue("d[3] == 255");
}
function shouldBeBlue(x, y) {
d = ctx.getImageData(x, y, 1, 1).data;
shouldBeTrue("d[0] == 0");
shouldBeTrue("d[1] == 0");
shouldBeTrue("d[2] == 255");
shouldBeTrue("d[3] == 255");
}
function shouldBeBlack(x, y) {
d = ctx.getImageData(x, y, 1, 1).data;
shouldBeTrue("d[0] == 0");
shouldBeTrue("d[1] == 0");
shouldBeTrue("d[2] == 0");
shouldBeTrue("d[3] == 255");
}
function shouldBeClear(x, y) {
// should be transparent black pixels
d = ctx.getImageData(x, y, 1, 1).data;
shouldBeTrue("d[0] == 0");
shouldBeTrue("d[1] == 0");
shouldBeTrue("d[2] == 0");
shouldBeTrue("d[3] == 0");
}
var checks = { red: shouldBeRed,
green: shouldBeGreen,
blue: shouldBeBlue,
black: shouldBeBlack,
clear: shouldBeClear };
function checkQuad(x, y, top_left, top_right, bottom_left, bottom_right) {
checks[top_left](x, y);
checks[top_right](x + 1, y);
checks[bottom_left](x, y + 1);
checks[bottom_right](x + 1, y + 1);
}
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;
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();
}
function loaded() {
if (imageLoaded && imageBitmapLoaded) {
ctx.fillStyle = ctx.createPattern(testBitmap, "repeat");
ctx.fillRect(10, 10, 30, 30);
// Check each pixel quad at each corner. The filled pattern
// is 3x3 squares of different colors, so there are four rows
// of four corners.
checkQuad(9, 9, "clear", "clear", "clear", "black");
checkQuad(19, 9, "clear", "clear", "black", "blue");
checkQuad(29, 9, "clear", "clear", "blue", "black");
checkQuad(39, 9, "clear", "clear", "black", "clear");
checkQuad(9, 19, "clear", "black", "clear", "green");
checkQuad(19, 19, "black", "blue", "green", "red");
checkQuad(29, 19, "blue", "black", "red", "green");
checkQuad(39, 19, "black", "clear", "green", "clear");
checkQuad(9, 29, "clear", "green", "clear", "black");
checkQuad(19, 29, "green", "red", "black", "blue");
checkQuad(29, 29, "red", "green", "blue", "black");
checkQuad(39, 29, "green", "clear", "black", "clear");
checkQuad(9, 39, "clear", "black", "clear", "clear");
checkQuad(19, 39, "black", "blue", "clear", "clear");
checkQuad(29, 39, "blue", "black", "clear", "clear");
checkQuad(39, 39, "black", "clear", "clear", "clear");
finishJSTest();
}
}
</script>
</body>
</html>
|
