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https://github.com/servo/servo.git
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148 lines
5.2 KiB
HTML
148 lines
5.2 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-converttoblob">
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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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function drawCanvas(ctx)
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{
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ctx.fillStyle = "red";
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ctx.fillRect(0, 0, 5, 5);
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ctx.fillStyle = "green";
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ctx.fillRect(5, 0, 5, 5);
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ctx.fillStyle = "blue";
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ctx.fillRect(0, 5, 5, 5);
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ctx.fillStyle = "black";
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ctx.fillRect(5, 5, 5, 5);
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}
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function compareImages(image1, image2)
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{
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var canvas1 = document.createElement('canvas');
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var canvas2 = document.createElement('canvas');
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canvas1.width = canvas1.height = 10;
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canvas2.width = canvas2.height = 10;
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var ctx1 = canvas1.getContext('2d');
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var ctx2 = canvas1.getContext('2d');
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ctx1.drawImage(image1, 0, 0);
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ctx2.drawImage(image2, 0, 0);
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var data1 = ctx1.getImageData(0, 0, 10, 10).data;
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var data2 = ctx2.getImageData(0, 0, 10, 10).data;
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assert_equals(data1.length, data2.length);
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var imageMatched = true;
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for (var i = 0; i < data1.length; i++) {
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if (data1[i] != data2[i]) {
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imageMatched = false;
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break;
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}
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}
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assert_true(imageMatched);
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}
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function testConvertToBlob(t, typeVal, qualityVal) {
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var offscreenCanvas = new OffscreenCanvas(10, 10);
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var oCtx = offscreenCanvas.getContext('2d');
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drawCanvas(oCtx);
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var canvas = document.createElement('canvas');
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var ctx = canvas.getContext('2d');
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drawCanvas(ctx);
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var imageLoadedCounter = 0;
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var image1 = new Image();
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var image2 = new Image();
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var promise;
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if (typeVal == "empty" && qualityVal == "empty")
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promise = offscreenCanvas.convertToBlob();
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else if (typeVal == "empty" && qualityVal != "empty")
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promise = offscreenCanvas.convertToBlob({quality: qualityVal});
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else if (typeVal != "empty" && qualityVal == "empty")
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promise = offscreenCanvas.convertToBlob({type: typeVal});
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else
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promise = offscreenCanvas.convertToBlob({type: typeVal, quality: qualityVal});
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promise.then(function(blob2) {
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image2.src = URL.createObjectURL(blob2);
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if (typeVal == "empty" && qualityVal == "empty") {
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canvas.toBlob(function(blob1) {
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image1.src = URL.createObjectURL(blob1);
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});
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} else if (typeVal == "empty" && qualityVal != "empty") {
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canvas.toBlob(function(blob1) {
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image1.src = URL.createObjectURL(blob1);
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}, "image/png", qualityVal);
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} else if (typeVal != "empty" && qualityVal == "empty") {
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canvas.toBlob(function(blob1) {
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image1.src = URL.createObjectURL(blob1);
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}, typeVal, 1.0);
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} else {
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canvas.toBlob(function(blob1) {
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image1.src = URL.createObjectURL(blob1);
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}, typeVal, qualityVal);
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}
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image1.onload = image2.onload = t.step_func(function() {
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imageLoadedCounter++;
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if (imageLoadedCounter == 2) {
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compareImages(image1, image2);
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t.done();
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}
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});
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});
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}
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async_test(function(t) {
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testConvertToBlob(t, "empty", "empty");
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testConvertToBlob(t, "empty", 1.0);
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testConvertToBlob(t, "empty", 0.2);
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}, "Test that convertToBlob with default type produces correct result");
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async_test(function(t) {
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testConvertToBlob(t, "image/png", "empty");
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testConvertToBlob(t, "image/png", 1.0);
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testConvertToBlob(t, "image/png", 0.2);
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}, "Test that convertToBlob with png produces correct result");
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async_test(function(t) {
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testConvertToBlob(t, "image/jpeg", "empty");
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testConvertToBlob(t, "image/jpeg", 1.0);
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testConvertToBlob(t, "image/jpeg", 0.2);
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}, "Test that convertToBlob with jpge produces correct result");
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async_test(function(t) {
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testConvertToBlob(t, "image/webp", "empty");
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testConvertToBlob(t, "image/webp", 1.0);
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testConvertToBlob(t, "image/webp", 0.2);
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}, "Test that convertToBlob with webp produces correct result");
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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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offscreenCanvas.convertToBlob().then(t.step_func_done(function() {
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assert_false("convertToBlob didn't throw, but should be");
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}), t.step_func_done(function(e) {
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assert_true(e instanceof DOMException);
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assert_equals(e.name, "InvalidStateError");
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}));
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}, "Test that call convertToBlob on a detached OffscreenCanvas throws exception");
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async_test(function(t) {
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var offscreenCanvas = new OffscreenCanvas(0, 0);
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offscreenCanvas.convertToBlob().then(t.step_func_done(function() {
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assert_false("convertToBlob didn't throw, but should be");
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}), t.step_func_done(function(e) {
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assert_true(e instanceof DOMException);
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assert_equals(e.name, "IndexSizeError");
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}));
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}, "Test that call convertToBlob on a OffscreenCanvas with size 0 throws exception");
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</script>
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