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34 lines
1.3 KiB
HTML
34 lines
1.3 KiB
HTML
<!DOCTYPE html>
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<meta charset="utf-8">
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<title>Canvas's ImageBitmapRenderingContext test</title>
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<link rel="help" href="https://html.spec.whatwg.org/multipage/scripting.html#the-imagebitmap-rendering-context">
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<script>
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var width = 10;
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var height = 10;
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promise_test(function() {
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function testException(image) {
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var dstCanvas = document.createElement('canvas');
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dstCanvas.width = width;
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dstCanvas.height = height;
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var dstCtx = dstCanvas.getContext('bitmaprenderer');
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dstCtx.transferFromImageBitmap(image);
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// The image should be detached after transferFromImageBitmap.
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assert_equals(image.width, 0);
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assert_equals(image.height, 0);
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assert_throws_dom("InvalidStateError", function() { dstCtx.transferFromImageBitmap(image); });
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}
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var srcCanvas = document.createElement('canvas');
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srcCanvas.width = width;
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srcCanvas.height = height;
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var ctx = srcCanvas.getContext('2d');
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ctx.fillStyle = 'rgba(0, 255, 0, 0.5)';
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ctx.fillRect(0, 0, width, height);
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return createImageBitmap(srcCanvas).then(testException);
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}, "Test transferFromImageBitmap(image) with a detached image should throw InvalidStateError");
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</script>
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