| <!DOCTYPE html> |
| |
| <html> |
| <head> |
| <style type="text/css" media="screen"> |
| .box { |
| position: relative; |
| height: 100px; |
| width: 100px; |
| margin: 10px; |
| left: 0; |
| top: 0; |
| background-color: silver; |
| } |
| |
| .clipping { |
| position: relative; |
| z-index: 0; |
| width: 300px; |
| border: 1px solid black; |
| padding: 20px; |
| overflow: hidden; |
| } |
| |
| .composited { |
| -webkit-transform: translateZ(0); |
| } |
| </style> |
| |
| <script> |
| if (window.testRunner) |
| testRunner.dumpAsText(); |
| |
| function dumpLayers() |
| { |
| var layersResult = document.getElementById('layers'); |
| if (window.testRunner) |
| layersResult.innerText = window.internals.layerTreeAsText(document); |
| |
| } |
| window.addEventListener('load', dumpLayers, false) |
| </script> |
| |
| </head> |
| <body> |
| |
| <div class="clipping"> |
| This layer should not have backing store. |
| <div class="box composited"></div> |
| </div> |
| <div class="clipping" style="margin-top: -10px;"> |
| This layer should have backing store. |
| <div class="box composited"></div> |
| </div> |
| |
| <pre id="layers">Layer tree goes here in DRT</pre> |
| |
| </body> |
| </html> |
