third_party/WebKit/LayoutTests/compositing/squashing/squashing-inside-preserve-3d-element.html

   1 <!doctype html>
   2 <div style="-webkit-transform-style: preserve-3d">
   3   <div style="width: 100px; height: 100px; background:lightgray; transform:translateZ(0)"></div>
   4   <div id="target" style="position: absolute; top: 20px; left: 20px; height: 100px; width: 100px; background:lightblue"></div>
   5 </div>
   6 <script src="../../fast/repaint/resources/text-based-repaint.js"></script>
   7 <script>
   8 // Test that squashing works properly when inside of a transform-style: preserve-3d element. In the bug that this layout test
   9 // was added to fix, the coordinates of the squashing layer paint invalidation rects were not recorded correctly, because some of
  10 // the code computed transformed ancestors incorrectly (it should *not* include the preserve-3d element).
  11
  12 function repaintTest() {
  13     var target = document.getElementById('target');
  14     target.style.background = 'red';
  15 }
  16
  17 runRepaintTest();
  18 </script>