| <!DOCTYPE html> |
| <html> |
| <head> |
| <script src="../../resources/testharness.js"></script> |
| <script src="../../resources/testharnessreport.js"></script> |
| </head> |
| <body> |
| <script> |
| var barrier = 2; |
| function frameLoaded() |
| { |
| barrier--; |
| if (barrier == 0) |
| runTest(); |
| } |
| |
| function runTest() |
| { |
| test(function(t) { |
| canvasTest(document.getElementById("frame1"), true); |
| }, 'check if re-parenting canvas keeps its context.'); |
| |
| test(function(t) { |
| canvasTest(document.getElementById("frame2"), false); |
| }, 'check if detaching canvas loses its context.'); |
| } |
| |
| var data; |
| function canvasTest(frame, adoptCanvas) |
| { |
| var parent = document.getElementById("parent"); |
| var canvas = frame.contentDocument.getElementById('mycanvas'); |
| var ctx = canvas.getContext('2d'); |
| |
| var imageData; |
| imageData = ctx.getImageData(100, 100, 1, 1); |
| data = imageData.data; |
| assert_equals(data[0], 255); |
| assert_equals(data[1], 0); |
| assert_equals(data[2], 0); |
| |
| if (adoptCanvas) |
| parent.appendChild(canvas); |
| parent.removeChild(frame); |
| |
| imageData = ctx.getImageData(100, 100, 1, 1); |
| data = imageData.data; |
| if (adoptCanvas) { |
| assert_equals(data[0], 255); |
| } else { |
| // GC causes active DOM stop and canvas loses its context. |
| assert_equals(data[0], 0); |
| } |
| assert_equals(data[1], 0); |
| assert_equals(data[2], 0); |
| } |
| </script> |
| <div id="parent"> |
| <iframe id="frame1" src="resources/canvas-fill-for-iframe.html" onload="frameLoaded()"></iframe> |
| <iframe id="frame2" src="resources/canvas-fill-for-iframe.html" onload="frameLoaded()"></iframe> |
| </div> |
| </body> |
| </html> |
