| <!DOCTYPE html> |
| |
| <html> |
| <head> |
| <style> |
| .box { |
| position: absolute; |
| top: 10px; |
| left: 10px; |
| width: 400px; |
| height: 400px; |
| background-image: url('../resources/alpha-blocks.png'); |
| background-size: 400px 400px; |
| } |
| |
| #box.moved { |
| background-position: -100px -100px; |
| top: 110px; |
| left: 110px; |
| } |
| |
| .composited { |
| -webkit-transform: translateZ(0); |
| } |
| </style> |
| <script> |
| if (window.testRunner) { |
| testRunner.dumpAsText(); |
| testRunner.waitUntilDone(); |
| } |
| |
| function test() |
| { |
| window.setTimeout(function() { |
| document.body.offsetTop; |
| if (window.internals) |
| window.internals.startTrackingRepaints(); |
| |
| document.getElementById('box').classList.add('moved'); |
| |
| if (window.internals) |
| document.getElementById('repaintRects').textContent = window.internals.layerTreeAsText(document, internals.LAYER_TREE_INCLUDES_REPAINT_RECTS); |
| |
| if (window.testRunner) |
| testRunner.notifyDone(); |
| }, 0); |
| } |
| window.addEventListener('load', test, false); |
| </script> |
| </head> |
| <body> |
| |
| <div id="box" class="composited box"></div> |
| <pre id="repaintRects"></pre> |
| </body> |
| </html> |
