third_party/WebKit/LayoutTests/paint/invalidation/spv2/scrolling-without-painting.html

   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.internals)
  28           window.internals.settings.setPreferCompositingToLCDTextEnabled(true);
  29
  30       window.expectedPaintInvalidationObjects = [
  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>