| <!-- Based on fast/repaint/fixed-under-composited-fixed-scrolled.html --> |
| <!DOCTYPE html> |
| <script src="resources/paint-invalidation-test.js"></script> |
| <script> |
| window.expectedPaintInvalidationObjects = [ |
| "LayoutBlockFlow (positioned) DIV id='fixed'", |
| ]; |
| function paintInvalidationTest() { |
| document.getElementById('fixed').style.display = 'none'; |
| } |
| onload = function() { |
| // Scroll before repaint test to test correct scroll offset of invalidation rect |
| // for fixed-position element when it needs repaint. |
| window.scrollTo(0, 400); |
| runPaintInvalidationTest(); |
| }; |
| </script> |
| <style> |
| body { |
| height: 2000px; |
| } |
| #fixed-container { |
| position: fixed; |
| top: 0; |
| left: 0; |
| width: 100%; |
| height: 100%; |
| background-color: green; |
| backface-visibility: hidden; |
| } |
| #fixed { |
| position: fixed; |
| top: 100px; |
| left: 100px; |
| width: 200px; |
| height: 200px; |
| background-color: red; |
| } |
| </style> |
| Tests paint invalidation of fixed elements under a composited fixed element after scrolled. |
| Passes if there is only green background. |
| <div id="fixed-container"> |
| <div id="fixed"></div> |
| </div> |
