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| 1 <!DOCTYPE html> | |
| 2 <html> | |
| 3 <head> | |
| 4 <!-- This test case reproduces a bug that is hopefully solved by https://bugs.
webkit.org/show_bug.cgi?id=80641 | |
| 5 | |
| 6 In the bug, a div element begins as non-composited, and the repaintRect h
ad a | |
| 7 correct non-zero offset because it paints into an ancestor container. Lat
er, the | |
| 8 layer becomes composited (in this case, because the layer is moved to ove
rlap | |
| 9 another composited layer). Because the layer is now composited, the repai
ntRect | |
| 10 should have been recomputed - in particular, the offset of the repaintRec
t should | |
| 11 become zero because it is now its own repaint container. | |
| 12 | |
| 13 Therefore, after the layer became composited, it was using the wrong repa
int rect, | |
| 14 which caused things not to repaint properly. | |
| 15 --> | |
| 16 | |
| 17 <style type="text/css"> | |
| 18 .composited { | |
| 19 transform: translatez(0); | |
| 20 border: 2px solid black; | |
| 21 } | |
| 22 | |
| 23 .box { | |
| 24 width: 200px; | |
| 25 height: 200px; | |
| 26 } | |
| 27 | |
| 28 #scrolldiv { | |
| 29 position: absolute; | |
| 30 width: 100px; | |
| 31 height: 100px; | |
| 32 left: 250px; | |
| 33 top: 50px; | |
| 34 overflow-x: hidden; | |
| 35 overflow-y: scroll; | |
| 36 } | |
| 37 | |
| 38 .shouldNotBeSeen { | |
| 39 background-color: red; | |
| 40 } | |
| 41 | |
| 42 .shouldBeSeen { | |
| 43 background-color: green; | |
| 44 } | |
| 45 </style> | |
| 46 | |
| 47 </head> | |
| 48 | |
| 49 <script src="../../resources/run-after-layout-and-paint.js"></script> | |
| 50 | |
| 51 <script> | |
| 52 if (window.testRunner) { | |
| 53 testRunner.dumpAsTextWithPixelResults(); | |
| 54 testRunner.waitUntilDone(); | |
| 55 } | |
| 56 | |
| 57 function changeDivPosition() { | |
| 58 document.getElementById("scrolldiv").style.left="50px"; | |
| 59 } | |
| 60 | |
| 61 function repaintTest() { | |
| 62 runAfterLayoutAndPaint(function() { | |
| 63 // Changing the position will cause the scrolldiv to become composited
becuase it overlaps another compostied element. | |
| 64 changeDivPosition(); | |
| 65 | |
| 66 // Force DumpRenderTree to do a layout and repaint here, this is where
the repaintRect | |
| 67 // goes wrong because it does not get updated for a newly composited e
lement. | |
| 68 runAfterLayoutAndPaint(function() { | |
| 69 // Scrolling a little will demonstrate whether the repaint rect is
correct or not. | |
| 70 document.getElementById('scrolldiv').scrollTop = 500; | |
| 71 testRunner.notifyDone(); | |
| 72 }); | |
| 73 }); | |
| 74 } | |
| 75 | |
| 76 </script> | |
| 77 | |
| 78 <body onload="repaintTest()"> | |
| 79 <div class="composited box"></div> | |
| 80 <div id="scrolldiv"> | |
| 81 <div class="shouldNotBeSeen box"></div> | |
| 82 <div class="shouldBeSeen box"></div> | |
| 83 </div> | |
| 84 </body> | |
| 85 | |
| 86 </html> | |
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Chromium Code Reviews
Issue 2327223002:
Move all remaining fast/repaint tests to paint/invalidation (Closed)
