src/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 if (window.internals)
   9     internals.settings.setLayerSquashingEnabled(true);
  10
  11 // Test that squashing works properly when inside of a transform-style: preserve-3d element. In the bug that this layout test
  12 // was added to fix, the coordinates of the squashing layer paint invalidation rects were not recorded correctly, because some of
  13 // the code computed transformed ancestors incorrectly (it should *not* include the preserve-3d element).
  14
  15 function repaintTest() {
  16     var target = document.getElementById('target');
  17     target.style.background = 'red';
  18 }
  19
  20 runRepaintTest();
  21 </script>