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1 <!-- Based on compositing/overflow/scrolling-without-painting.html --> | |
2 <!DOCTYPE html> | |
3 | |
4 <!-- | |
5 This test checks that accelerated scrolling layers can be scrolled without | |
6 repainting their contents. See https://bugs.webkit.org/show_bug.cgi?id=96087. | |
7 --> | |
8 | |
9 <html> | |
10 <head> | |
11 <style type="text/css"> | |
12 #scroller { | |
13 overflow: scroll; | |
14 -webkit-overflow-scrolling: touch; | |
15 width: 200px; | |
16 height: 200px; | |
17 border: solid thin blue; | |
18 } | |
19 | |
20 #content { | |
21 height: 1000px; | |
22 margin-top: 25px; | |
23 } | |
24 </style> | |
25 <script src="resources/paint-invalidation-test.js"></script> | |
26 <script type="text/javascript"> | |
27 if (window.testRunner) | |
28 testRunner.dumpAsText(); | |
29 if (window.internals) | |
30 window.internals.settings.setPreferCompositingToLCDTextEnabled(true); | |
31 | |
32 function paintInvalidationTest() { | |
33 // Scroll down. This should not cause any more repaints to the | |
34 // scrolling contents. | |
35 document.getElementById('scroller').scrollTop = 25; | |
36 } | |
37 | |
38 runPaintInvalidationTest(); | |
39 </script> | |
40 </head> | |
41 <body> | |
42 <div id="scroller"> | |
43 <div id="content"></div> | |
44 </div> | |
45 </body> | |
46 </html> | |
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