| OLD | NEW |
|---|
| (Empty) | |
| 1 <!DOCTYPE html> |
| 2 |
| 3 <html> |
| 4 <head> |
| 5 <style> |
| 6 .fixed { |
| 7 position: fixed; |
| 8 z-index: 1; |
| 9 } |
| 10 |
| 11 .absolute { |
| 12 position: absolute; |
| 13 } |
| 14 |
| 15 .unscrollable { |
| 16 overflow-x: hidden; |
| 17 overflow-y: hidden; |
| 18 } |
| 19 |
| 20 .box { |
| 21 top: 100px; |
| 22 left: 10px; |
| 23 width: 100px; |
| 24 height: 100px; |
| 25 } |
| 26 |
| 27 .bigBox { |
| 28 width: 300px; |
| 29 height: 300px; |
| 30 } |
| 31 |
| 32 .red { |
| 33 background-color: red; |
| 34 } |
| 35 |
| 36 .lime { |
| 37 background-color: lime; |
| 38 } |
| 39 |
| 40 .composited { |
| 41 -webkit-transform: translatez(0); |
| 42 } |
| 43 |
| 44 .scrollable { |
| 45 border: solid black 1px; |
| 46 overflow: scroll; |
| 47 } |
| 48 </style> |
| 49 |
| 50 <script type="text/javascript"> |
| 51 if (window.internals) |
| 52 window.internals.settings.setAcceleratedCompositingForFixedPositionEnabled
(true); |
| 53 |
| 54 if (window.testRunner) { |
| 55 testRunner.dumpAsText(); |
| 56 |
| 57 window.addEventListener("load", function() { |
| 58 document.getElementById("layertree").innerText = window.internals.layerT
reeAsText(document); |
| 59 }, false); |
| 60 } |
| 61 </script> |
| 62 </head> |
| 63 |
| 64 <body class="unscrollable"> |
| 65 <p>Even though the fixed-position element's container is nonscrollable, it |
| 66 should still be composited because one of its ancestors is scrolling.</p> |
| 67 <pre id="layertree"></pre> |
| 68 |
| 69 <div class="scrollable bigBox"> |
| 70 <div style="height: 800px;"></div> |
| 71 <div class="fixed lime box"></div> |
| 72 </div> |
| 73 </body> |
| 74 </html> |
| 75 |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 13828004:
Avoid compositing fixed-position elements if they cannot scroll (Closed)
Base URL: svn://svn.chromium.org/blink/trunk