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<!DOCTYPE html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/html/canvas/resources/canvas-tests.js"></script>
<link rel="help" href="https://html.spec.whatwg.org/#dom-offscreencanvas-transfertoimagebitmap">
<script id="myWorker" type="text/worker">
function testSize(contextType)
{
var offscreenCanvas = new OffscreenCanvas(100, 50);
var ctx = offscreenCanvas.getContext(contextType);
var image = offscreenCanvas.transferToImageBitmap();
if (image.width == 100 && image.height == 50)
return true;
return false;
}
function testImageBitmapClr(shouldCallTwice, alphaVal) {
var offscreenCanvas = new OffscreenCanvas(100, 50);
var ctx = offscreenCanvas.getContext('2d', {alpha: alphaVal});
ctx.fillStyle = "#0f0";
ctx.fillRect(0, 0, 100, 50);
var image = offscreenCanvas.transferToImageBitmap();
if (shouldCallTwice)
image = offscreenCanvas.transferToImageBitmap();
return image;
}
function isInvalidStateError(funcStr, offscreenCanvas)
{
try {
eval(funcStr);
} catch (e) {
if (e instanceof DOMException && e.name == "InvalidStateError")
return true;
return false;
}
}
function testImageBitmapSize()
{
return testSize('2d') && testSize('webgl');
}
function testLineWidthNotAltered()
{
var offscreenCanvas = new OffscreenCanvas(100, 50);
var ctx = offscreenCanvas.getContext('2d');
ctx.lineWidth = 10;
var image = offscreenCanvas.transferToImageBitmap();
return ctx.lineWidth == 10;
}
function testTransformPreserved()
{
var offscreenCanvas = new OffscreenCanvas(100, 50);
var ctx = offscreenCanvas.getContext('2d');
ctx.rect(0, 0, 25, 50);
ctx.clip();
ctx.translate(20, 20);
ctx.fillStyle = '#0f0';
var image1 = offscreenCanvas.transferToImageBitmap();
// trasnform should be preserved
ctx.fillRect(0, 0, 10, 10);
var image2 = offscreenCanvas.transferToImageBitmap();
return image2;
}
function testException()
{
var offscreenCanvas = new OffscreenCanvas(10, 10);
return isInvalidStateError("offscreenCanvas.transferToImageBitmap()", offscreenCanvas);
}
self.onmessage = function(e) {
switch (e.data) {
case 'test1':
self.postMessage(testImageBitmapSize());
break;
case 'test2':
self.postMessage(testImageBitmapClr(false, true));
break;
case 'test3':
self.postMessage(testImageBitmapClr(true, true));
break;
case 'test4':
self.postMessage(testImageBitmapClr(true, false));
break;
case 'test5':
self.postMessage(testLineWidthNotAltered());
break;
case 'test6':
self.postMessage(testTransformPreserved());
break;
case 'test7':
var offscreenCanvas = new OffscreenCanvas(10, 10);
self.postMessage({offscreenCanvas: offscreenCanvas}, [offscreenCanvas]);
self.postMessage(isInvalidStateError("offscreenCanvas.transferToImageBitmap()", offscreenCanvas));
break;
case 'test8':
self.postMessage(testException());
break;
}
};
</script>
<script>
function makeWorker(test) {
var blob = new Blob([document.getElementById("myWorker").textContent]);
var worker = new Worker(URL.createObjectURL(blob));
worker.onerror = test.unreached_func("error");
return worker;
}
function drawImageBitmap(image, x, y)
{
var drawCanvas = document.createElement('canvas');
drawCanvas.width = 100;
drawCanvas.height = 50;
var dCtx = drawCanvas.getContext('2d');
dCtx.drawImage(image, 0, 0);
return dCtx.getImageData(x, y, 1, 1).data;
}
async_test(function(t) {
var worker = makeWorker(t);
worker.addEventListener('message', t.step_func_done(function(msg) {
assert_true(msg.data);
}));
worker.postMessage('test1');
}, "Test that transferToImageBitmap returns an ImageBitmap with correct width and height in a worker");
async_test(function(t) {
var worker = makeWorker(t);
worker.addEventListener('message', t.step_func_done(function(msg) {
var clr = drawImageBitmap(msg.data, 50, 25);
assert_array_equals(clr, [0, 255, 0, 255]);
}));
worker.postMessage('test2');
}, "Test that transferToImageBitmap returns an ImageBitmap with correct color in a worker");
async_test(function(t) {
var worker = makeWorker(t);
worker.addEventListener('message', t.step_func_done(function(msg) {
var clr = drawImageBitmap(msg.data, 50, 25);
assert_array_equals(clr, [0, 0, 0, 0]);
}));
worker.postMessage('test3');
}, "Test that call transferToImageBitmap twice returns an ImageBitmap with correct color in a worker");
async_test(function(t) {
var worker = makeWorker(t);
worker.addEventListener('message', t.step_func_done(function(msg) {
var clr = drawImageBitmap(msg.data, 50, 25);
assert_array_equals(clr, [0, 0, 0, 255]);
}));
worker.postMessage('test4');
}, "Test that call transferToImageBitmap twice on a alpha-disabled context returns an ImageBitmap with correct color in a worker");
async_test(function(t) {
var worker = makeWorker(t);
worker.addEventListener('message', t.step_func_done(function(msg) {
assert_true(msg.data);
}));
worker.postMessage('test5');
}, "Test that transferToImageBitmap won't change context's property in a worker");
async_test(function(t) {
var worker = makeWorker(t);
worker.addEventListener('message', t.step_func_done(function(msg) {
var clr1 = drawImageBitmap(msg.data, 23, 25);
assert_array_equals(clr1, [0, 255, 0, 255]);
var clr2 = drawImageBitmap(msg.data, 27, 25);
assert_array_equals(clr2, [0, 0, 0, 0]);
}));
worker.postMessage('test6');
}, "Test that call transferToImageBitmap preserves transform in a worker");
async_test(function(t) {
var worker = makeWorker(t);
worker.addEventListener('message', t.step_func_done(function(msg) {
if (msg.data == true || msg.data == false)
assert_true(msg.data);
}));
worker.postMessage('test7');
}, "Test that call transferToImageBitmap on a detached OffscreenCanvas throws an exception in a worker");
async_test(function(t) {
var worker = makeWorker(t);
worker.addEventListener('message', t.step_func_done(function(msg) {
assert_true(msg.data);
}));
worker.postMessage('test8');
}, "Test that call transferToImageBitmap without a context throws an exception in a worker");
</script>
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