| <!DOCTYPE html> |
| <script src="../../resources/testharness.js"></script> |
| <script src="../../resources/testharnessreport.js"></script> |
| <script> |
| async_test(function(t) { |
| var channel = new MessageChannel; |
| channel.port1.onmessage = function(e) { |
| t.step(function() { |
| assert_true(e.data !== null); |
| assert_equals(e.data.width, 10); |
| assert_equals(e.data.height, 10); |
| var destCtx = document.createElement('canvas').getContext('2d'); |
| destCtx.drawImage(e.data, 0, 0); |
| var pixel = destCtx.getImageData(5, 5, 1, 1).data; |
| assert_array_equals(pixel, [0, 255, 0, 255]); |
| }); |
| t.done(); |
| }; |
| channel.port1.start(); |
| var sourceCanvas = document.createElement('canvas'); |
| sourceCanvas.width = sourceCanvas.height = 10; |
| var sourceCtx = sourceCanvas.getContext('2d'); |
| sourceCtx.fillStyle = '#0f0'; |
| sourceCtx.fillRect(0, 0, 10, 10); |
| createImageBitmap(sourceCanvas).then( bitmap => { |
| channel.port2.postMessage(bitmap, [bitmap]); |
| }); |
| }, "Test that an ImageBitmap generated from a canvas survives being transferred via a MessageChannel"); |
| </script> |
