| <!doctype HTML> |
| <body> |
| <div style="height: 2000px; width: 2000px;"> |
| <img id="targetImage"> |
| </div> |
| <script src="../../fast/repaint/resources/text-based-repaint.js"></script> |
| <script> |
| window.testIsAsync = true; |
| |
| // The image should not show a paint invalidation if offscreen if Slimming Paint is on. |
| // Otherwise it should. |
| |
| // Steps: |
| // 1. Load the image |
| // 2. Move the image offscreen |
| // 3. Start tracking paint invalidation rects |
| // 4. Call layoutAndPaintAsyncThen (via runRepaintTest, which does this for us) to draw a frame |
| // 5. Wait longer than 100ms, so that the timer between the first and second animated GIF |
| // frame expires and a paint invalidation is issued on the animated GIF. (100ms is the |
| // length of the first frame of the animation in the GIF file.) |
| // 6. Stop tracking paint invalidation rects (finishRepaintTest does this for us) |
| |
| // These steps differ from a standard repaint test in that step 3 precedes step 4. |
| // This is critical because layoutAndPaintAsyncThen may take longer than the 100ms of the timer, |
| // so we may miss it. |
| |
| function repaintTest() { |
| setTimeout(finishRepaintTest, 150); |
| } |
| |
| function targetImageOnload() { |
| window.scrollTo(0, 1000); |
| if (window.internals) |
| internals.startTrackingRepaints(document); |
| runRepaintTest(); |
| } |
| |
| onload = function() { |
| targetImage.onload = targetImageOnload; |
| targetImage.src = "../../fast/backgrounds/resources/red-green-animated.gif"; |
| } |
| </script> |
