| OLD | NEW |
|---|
| (Empty) |
| 1 <!DOCTYPE html> | |
| 2 | |
| 3 <html> | |
| 4 <head> | |
| 5 <style> | |
| 6 .container { | |
| 7 width: 200px; | |
| 8 height: 200px; | |
| 9 overflow: scroll; | |
| 10 margin: 20px; | |
| 11 border: 1px solid black; | |
| 12 } | |
| 13 | |
| 14 .scrolled { | |
| 15 width: 180px; | |
| 16 height: 90px; | |
| 17 margin: 10px; | |
| 18 background-color: gray; | |
| 19 position: relative; | |
| 20 } | |
| 21 | |
| 22 .positioned { | |
| 23 width: 120px; | |
| 24 height: 240px; | |
| 25 position: absolute; | |
| 26 } | |
| 27 | |
| 28 #firstChild { | |
| 29 z-index: 1; | |
| 30 } | |
| 31 | |
| 32 #secondChild { | |
| 33 z-index: 2; | |
| 34 } | |
| 35 | |
| 36 #predecessor { | |
| 37 left: 20px; | |
| 38 top: 20px; | |
| 39 z-index: 0; | |
| 40 background-color: green; | |
| 41 } | |
| 42 | |
| 43 #ancestor { | |
| 44 background-color: blue; | |
| 45 } | |
| 46 | |
| 47 </style> | |
| 48 <script src="resources/automatically-opt-into-composited-scrolling.js"></scrip
t> | |
| 49 <script> | |
| 50 if (window.testRunner) | |
| 51 testRunner.dumpAsText(); | |
| 52 | |
| 53 if (window.internals) | |
| 54 window.internals.settings.setAcceleratedCompositingForOverflowScrollEnable
d(true); | |
| 55 | |
| 56 function doTest() | |
| 57 { | |
| 58 var predecessor = document.getElementById('predecessor'); | |
| 59 var ancestor = document.getElementById('ancestor'); | |
| 60 var container = document.getElementById('container'); | |
| 61 var firstChild = document.getElementById('firstChild'); | |
| 62 var secondChild = document.getElementById('secondChild'); | |
| 63 | |
| 64 // Force a synchronous style recalc and layout. | |
| 65 document.body.offsetTop; | |
| 66 | |
| 67 if (window.internals) { | |
| 68 window.internals.forceCompositingUpdate(document); | |
| 69 | |
| 70 if (didOptIn(container)) | |
| 71 write('Passed - correctly opted into composited scrolling with a posit
ioned ancestor.') | |
| 72 else | |
| 73 write('FAILED - did not opt into composited scrolling with a positione
d ancestor when it would safe.') | |
| 74 } | |
| 75 } // function doTest | |
| 76 | |
| 77 window.addEventListener('load', doTest, false); | |
| 78 </script> | |
| 79 </head> | |
| 80 | |
| 81 <body> | |
| 82 <div class="positioned" id="predecessor"></div> | |
| 83 <div class="positioned" id="ancestor"> | |
| 84 <div class="container" id="container"> | |
| 85 <div class="scrolled" id="firstChild"></div> | |
| 86 <div class="scrolled" id="secondChild"></div> | |
| 87 </div> | |
| 88 </div> | |
| 89 <pre id="console"></pre> | |
| 90 </body> | |
| 91 </html> | |
| OLD | NEW |
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Chromium Code Reviews
Issue 244193002:
Enable universal accelerated overflow scroll (Closed)
Base URL: svn://svn.chromium.org/blink/trunk