mirror of
https://github.com/servo/servo.git
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112 lines
3.9 KiB
HTML
112 lines
3.9 KiB
HTML
<!DOCTYPE html>
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<script src="/common/canvas-tests.js"></script>
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<link rel="help" href="https://html.spec.whatwg.org/#dom-offscreencanvas-transfertoimagebitmap">
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<script id="myWorker" type="text/worker">
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self.onmessage = function(e) {
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};
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</script>
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<script>
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function makeWorker(script)
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{
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var blob = new Blob([script]);
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return new Worker(URL.createObjectURL(blob));
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}
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test(function() {
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function testSize(contextType) {
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var offscreenCanvas = new OffscreenCanvas(100, 50);
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var ctx = offscreenCanvas.getContext(contextType);
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var image = offscreenCanvas.transferToImageBitmap();
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assert_equals(image.width, 100);
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assert_equals(image.height, 50);
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}
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testSize('2d');
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testSize('webgl');
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}, "Test that transferToImageBitmap returns an ImageBitmap with correct width and height");
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test(function() {
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function testImageBitmapClr(shouldCallTwice, alphaVal) {
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var offscreenCanvas = new OffscreenCanvas(100, 50);
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var ctx = offscreenCanvas.getContext('2d', {alpha: alphaVal});
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ctx.fillStyle = "#0f0";
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ctx.fillRect(0, 0, 100, 50);
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var image = offscreenCanvas.transferToImageBitmap();
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if (shouldCallTwice)
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image = offscreenCanvas.transferToImageBitmap();
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var drawCanvas = document.createElement('canvas');
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drawCanvas.width = 100;
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drawCanvas.height = 50;
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var dCtx = drawCanvas.getContext('2d');
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dCtx.drawImage(image, 0, 0);
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if (shouldCallTwice) {
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if (alphaVal)
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_assertPixel(drawCanvas, 50,25, 0,0,0,0, "50,25", "0,0,0,0");
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else
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_assertPixel(drawCanvas, 50,25, 0,0,0,255, "50,25", "0,0,0,255");
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} else {
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_assertPixel(drawCanvas, 50,25, 0,255,0,255, "50,25", "0,255,0,255");
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}
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}
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testImageBitmapClr(false, true);
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testImageBitmapClr(true, true);
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testImageBitmapClr(true, false);
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}, "Test that transferToImageBitmap returns an ImageBitmap with correct color");
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test(function() {
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var offscreenCanvas = new OffscreenCanvas(100, 50);
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var ctx = offscreenCanvas.getContext('2d');
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ctx.lineWidth = 10;
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var image = offscreenCanvas.transferToImageBitmap();
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assert_equals(ctx.lineWidth, 10);
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}, "Test that transferToImageBitmap won't change context's property");
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test(function() {
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var offscreenCanvas = new OffscreenCanvas(100, 50);
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var ctx = offscreenCanvas.getContext('2d');
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ctx.rect(0, 0, 25, 50);
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ctx.clip();
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ctx.translate(20, 20);
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ctx.fillStyle = '#0f0';
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var image1 = offscreenCanvas.transferToImageBitmap();
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// trasnform should be preserved
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ctx.fillRect(0, 0, 10, 10);
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var image2 = offscreenCanvas.transferToImageBitmap();
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var drawCanvas = document.createElement('canvas');
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drawCanvas.width = 100;
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drawCanvas.height = 50;
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var dCtx = drawCanvas.getContext('2d');
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dCtx.drawImage(image2, 0, 0);
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// Verify that transform was carried over.
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_assertPixel(drawCanvas, 23,25, 0,255,0,255, "23,25", "0,255,0,255");
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// Verify that clip was carried over.
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_assertPixel(drawCanvas, 27,25, 0,0,0,0, "27,25", "0,0,0,0");
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}, "Test that transferToImageBitmap preserves transform");
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async_test(function(t) {
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var worker = makeWorker(document.getElementById("myWorker").textContent);
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var offscreenCanvas = new OffscreenCanvas(10, 10);
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worker.postMessage(offscreenCanvas, [offscreenCanvas]);
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assert_throws("InvalidStateError", function() { offscreenCanvas.transferToImageBitmap(); });
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t.done();
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}, "Test that call transferToImageBitmap on a detached OffscreenCanvas throws an exception");
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test(function() {
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var offscreenCanvas = new OffscreenCanvas(10, 10);
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assert_throws("InvalidStateError", function() { offscreenCanvas.transferToImageBitmap(); });
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}, "Test that transferToImageBitmap without a context throws an exception");
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</script>
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