| <!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; |
| |
| promise_test(function() { |
| function testException(image) { |
| var dstCanvas = document.createElement('canvas'); |
| dstCanvas.width = width; |
| dstCanvas.height = height; |
| var dstCtx = dstCanvas.getContext('bitmaprenderer'); |
| dstCtx.transferFromImageBitmap(image); |
| |
| // The image should be detached after transferFromImageBitmap. |
| assert_equals(image.width, 0); |
| assert_equals(image.height, 0); |
| assert_throws("InvalidStateError", function() { dstCtx.transferFromImageBitmap(image); }); |
| } |
| |
| var srcCanvas = document.createElement('canvas'); |
| srcCanvas.width = width; |
| srcCanvas.height = height; |
| var ctx = srcCanvas.getContext('2d'); |
| ctx.fillStyle = 'rgba(0, 255, 0, 0.5)'; |
| ctx.fillRect(0, 0, width, height); |
| return createImageBitmap(srcCanvas).then(testException); |
| }, "Test transferFromImageBitmap(image) with a detached image should throw InvalidStateError"); |
| |
| </script> |
