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| 1 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" | |
| 2 "http://www.w3.org/TR/html4/loose.dtd"> | |
| 3 | |
| 4 <html lang="en"> | |
| 5 <head> | |
| 6 <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> | |
| 7 <title>Composited scrolling creates a stacking context.</title> | |
| 8 <style type="text/css" media="screen"> | |
| 9 .container { | |
| 10 width: 200px; | |
| 11 height: 200px; | |
| 12 overflow: scroll; | |
| 13 margin: 20px; | |
| 14 border: 1px solid black; | |
| 15 } | |
| 16 | |
| 17 .composited { | |
| 18 width: 200px; | |
| 19 height: 150px; | |
| 20 -webkit-transform: translateZ(0); | |
| 21 background-color: green; | |
| 22 } | |
| 23 | |
| 24 .not-composited { | |
| 25 width: 200px; | |
| 26 height: 150px; | |
| 27 background-color: blue; | |
| 28 } | |
| 29 | |
| 30 .in-flow-positioned { | |
| 31 position: relative; | |
| 32 display: block; | |
| 33 } | |
| 34 | |
| 35 .fixed { | |
| 36 z-index: -1; | |
| 37 position: absolute; | |
| 38 width: 200px; | |
| 39 height: 300px; | |
| 40 background-color: red; | |
| 41 } | |
| 42 </style> | |
| 43 <script type="text/javascript" charset="utf-8"> | |
| 44 if (window.testRunner) | |
| 45 testRunner.dumpAsText(); | |
| 46 | |
| 47 if (window.internals) | |
| 48 window.internals.settings.setAcceleratedCompositingForOverflowScrollEnable
d(true); | |
| 49 | |
| 50 function doTest() | |
| 51 { | |
| 52 document.body.offsetTop; | |
| 53 | |
| 54 if (window.internals) { | |
| 55 var layerTree = window.internals.layerTreeAsText(document); | |
| 56 var pre = document.getElementById('console'); | |
| 57 var text = document.createTextNode(layerTree + '\n'); | |
| 58 pre.appendChild(text); | |
| 59 } | |
| 60 } | |
| 61 | |
| 62 window.addEventListener('load', doTest, false); | |
| 63 </script> | |
| 64 </head> | |
| 65 <body> | |
| 66 <div class="container"> | |
| 67 <div class="in-flow-positioned"> | |
| 68 <div class="fixed"></div> | |
| 69 </div> | |
| 70 <div class="composited"></div> | |
| 71 <div class="not-composited"></div> | |
| 72 </div> | |
| 73 <pre id="console"></pre> | |
| 74 </body> | |
| 75 </html> | |
| 76 | |
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Chromium Code Reviews
Issue 244193002:
Enable universal accelerated overflow scroll (Closed)
Base URL: svn://svn.chromium.org/blink/trunk