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diff --git a/testing/web-platform/tests/imagebitmap-renderingcontext/bitmaprenderer-as-imagesource.html b/testing/web-platform/tests/imagebitmap-renderingcontext/bitmaprenderer-as-imagesource.html
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+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>Canvas's ImageBitmapRenderingContext test</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<link rel="help" href="https://html.spec.whatwg.org/multipage/scripting.html#the-imagebitmap-rendering-context">
+<script>
+var width = 10;
+var height = 10;
+
+function testCanvas(ctx, x, y, r, g, b, a)
+{
+ var color = ctx.getImageData(x, y, 1, 1).data;
+ assert_array_equals(color, [r, g, b, a]);
+}
+
+function consumeImageBitmap(image, t)
+{
+ var myCanvas = document.createElement('canvas');
+ myCanvas.width = myCanvas.height = 20;
+ var myCtx = myCanvas.getContext('bitmaprenderer');
+ myCtx.transferFromImageBitmap(image);
+
+ createImageBitmap(myCanvas).then(t.step_func_done(function(imageBitmap) {
+ // Per spec, when transferFromImageBitmap happens, the transferred
+ // ImageBitmap (|image| here) must determine the intrinsic size of
+ // myCanvas, and hence myCanvas.width/height is ignored. Therefore,
+ // |imageBitmap| should have the same size as the |image|.
+ assert_equals(imageBitmap.width, width);
+ assert_equals(imageBitmap.height, height);
+
+ var dstCanvas = document.createElement('canvas');
+ dstCanvas.width = dstCanvas.height = 20;
+ var dstCtx = dstCanvas.getContext('2d');
+ dstCtx.drawImage(myCanvas, 0, 0);
+ testCanvas(dstCtx, 5, 5, 0, 255, 0, 255);
+ testCanvas(dstCtx, 15, 15, 0, 0, 0, 0);
+ }));
+}
+
+async_test(function(t) {
+ var canvas = document.createElement("canvas");
+ canvas.width = width;
+ canvas.height = height;
+ var ctx = canvas.getContext('2d');
+ ctx.fillStyle = '#0f0';
+ ctx.fillRect(0, 0, width, height);
+ createImageBitmap(canvas).then(t.step_func(function(image) {
+ consumeImageBitmap(image, t);
+ }));
+}, 'Test that createImageBitmap from a bitmaprenderer canvas produces correct result');
+
+async_test(function(t) {
+ var canvas = document.createElement("canvas");
+ canvas.width = width;
+ canvas.height = height;
+ var ctx = canvas.getContext('bitmaprenderer');
+ createImageBitmap(canvas).then(t.step_func_done(function(image) {
+ assert_equals(image.width, width);
+ assert_equals(image.height, height);
+
+ var dstCanvas = document.createElement('canvas');
+ dstCanvas.width = width;
+ dstCanvas.height = height;
+ var dstCtx = dstCanvas.getContext('2d');
+ dstCtx.drawImage(canvas, 0, 0);
+ testCanvas(dstCtx, 5, 5, 0, 0, 0, 0);
+ }));
+}, 'Test that createImageBitmap on a bitmaprenderer canvas that never consumes any source produces correct result');
+
+
+async_test(function(t) {
+ var canvas = document.createElement("canvas");
+ canvas.width = width;
+ canvas.height = height;
+ var ctx = canvas.getContext('bitmaprenderer');
+ ctx.transferFromImageBitmap(null);
+ createImageBitmap(canvas).then(t.step_func_done(function(image) {
+ assert_equals(image.width, width);
+ assert_equals(image.height, height);
+
+ var dstCanvas = document.createElement('canvas');
+ dstCanvas.width = width;
+ dstCanvas.height = height;
+ var dstCtx = dstCanvas.getContext('2d');
+ dstCtx.drawImage(canvas, 0, 0);
+ testCanvas(dstCtx, 5, 5, 0, 0, 0, 0);
+ }));
+}, 'Test that createImageBitmap on a bitmaprenderer canvas that consumes null produces correct result');
+</script>