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90 lines
3.4 KiB
HTML
90 lines
3.4 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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function testCanvas(ctx, x, y, r, g, b, a)
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{
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var color = ctx.getImageData(x, y, 1, 1).data;
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assert_array_equals(color, [r, g, b, a]);
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}
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function consumeImageBitmap(image, t)
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{
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var myCanvas = document.createElement('canvas');
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myCanvas.width = myCanvas.height = 20;
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var myCtx = myCanvas.getContext('bitmaprenderer');
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myCtx.transferFromImageBitmap(image);
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createImageBitmap(myCanvas).then(t.step_func_done(function(imageBitmap) {
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// Per spec, when transferFromImageBitmap happens, the transferred
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// ImageBitmap (|image| here) must determine the intrinsic size of
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// myCanvas, and hence myCanvas.width/height is ignored. Therefore,
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// |imageBitmap| should have the same size as the |image|.
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assert_equals(imageBitmap.width, width);
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assert_equals(imageBitmap.height, height);
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var dstCanvas = document.createElement('canvas');
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dstCanvas.width = dstCanvas.height = 20;
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var dstCtx = dstCanvas.getContext('2d');
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dstCtx.drawImage(myCanvas, 0, 0);
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testCanvas(dstCtx, 5, 5, 0, 255, 0, 255);
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testCanvas(dstCtx, 15, 15, 0, 0, 0, 0);
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}));
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}
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async_test(function(t) {
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var canvas = document.createElement("canvas");
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canvas.width = width;
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canvas.height = height;
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var ctx = canvas.getContext('2d');
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ctx.fillStyle = '#0f0';
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ctx.fillRect(0, 0, width, height);
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createImageBitmap(canvas).then(t.step_func(function(image) {
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consumeImageBitmap(image, t);
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}));
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}, 'Test that createImageBitmap from a bitmaprenderer canvas produces correct result');
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async_test(function(t) {
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var canvas = document.createElement("canvas");
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canvas.width = width;
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canvas.height = height;
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var ctx = canvas.getContext('bitmaprenderer');
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createImageBitmap(canvas).then(t.step_func_done(function(image) {
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assert_equals(image.width, width);
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assert_equals(image.height, height);
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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('2d');
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dstCtx.drawImage(canvas, 0, 0);
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testCanvas(dstCtx, 5, 5, 0, 0, 0, 0);
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}));
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}, 'Test that createImageBitmap on a bitmaprenderer canvas that never consumes any source produces correct result');
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async_test(function(t) {
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var canvas = document.createElement("canvas");
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canvas.width = width;
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canvas.height = height;
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var ctx = canvas.getContext('bitmaprenderer');
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ctx.transferFromImageBitmap(null);
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createImageBitmap(canvas).then(t.step_func_done(function(image) {
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assert_equals(image.width, width);
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assert_equals(image.height, height);
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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('2d');
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dstCtx.drawImage(canvas, 0, 0);
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testCanvas(dstCtx, 5, 5, 0, 0, 0, 0);
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}));
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}, 'Test that createImageBitmap on a bitmaprenderer canvas that consumes null produces correct result');
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</script>
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