| OLD | NEW |
|---|
| (Empty) | |
| 1 <!DOCTYPE html> |
| 2 <html> |
| 3 |
| 4 <head> |
| 5 <style> |
| 6 |
| 7 .compositedBehind { |
| 8 width: 500px; |
| 9 height: 500px; |
| 10 -webkit-transform: translatez(0); |
| 11 background-color: cyan; |
| 12 } |
| 13 |
| 14 .containerOverlapsComposited { |
| 15 position: absolute; |
| 16 z-index: 2; /* Creates a stacking context so that the fixed-pos layer is conta
ined instead of a sibling */ |
| 17 top: 20px; |
| 18 left: 20px; |
| 19 width: 100px; |
| 20 height: 30000px; |
| 21 background-color: green; |
| 22 } |
| 23 |
| 24 .fixed { |
| 25 position: fixed; |
| 26 top: 45px; |
| 27 left: 45px; |
| 28 background-color: lime; |
| 29 width: 50px; |
| 30 height: 50px; |
| 31 } |
| 32 |
| 33 </style> |
| 34 |
| 35 <script> |
| 36 if (window.testRunner) |
| 37 testRunner.dumpAsText(); |
| 38 |
| 39 if (window.internals) { |
| 40 /* Note carefully, compositing for fixed position is _disabled_ here
*/ |
| 41 internals.settings.setAcceleratedCompositingForFixedPositionEnabled(
false); |
| 42 internals.settings.setFixedPositionCreatesStackingContext(true); |
| 43 } |
| 44 |
| 45 function test() |
| 46 { |
| 47 document.body.offsetHeight; |
| 48 if (window.internals) |
| 49 window.internals.startTrackingRepaints(document); |
| 50 |
| 51 window.scrollTo(0, 100); |
| 52 |
| 53 if (window.internals) |
| 54 document.getElementById('layers').textContent = window.internals
.layerTreeAsText(document, internals.LAYER_TREE_INCLUDES_REPAINT_RECTS); |
| 55 } |
| 56 </script> |
| 57 |
| 58 </head> |
| 59 |
| 60 |
| 61 |
| 62 <body onload="test()"> |
| 63 <!-- |
| 64 Among other duplicate bugs: https://code.google.com/p/chromium/issues/det
ail?id=128375 |
| 65 A non-composited fixed-position element can get grouped into a composited
container. |
| 66 In this case, repaint invalidations were incorrectly going to the RenderV
iew instead |
| 67 of the composited container. The incorrect result was that the fixed-pos
ition element |
| 68 never repainted, and it appeared to scroll along with the composited cont
ainer. |
| 69 --> |
| 70 <div class="compositedBehind"> </div> |
| 71 |
| 72 <div class="containerOverlapsComposited"> |
| 73 <div class="fixed"></div> |
| 74 </div> |
| 75 |
| 76 <pre id="layers"></pre> |
| 77 </body> |
| 78 |
| 79 </html> |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 23523046:
Fixed-position repaint invalidations should be sent to the correct composited layer. (Closed)
Base URL: svn://svn.chromium.org/blink/trunk