| <!DOCTYPE html> |
| |
| <html> |
| <head> |
| <style> |
| body { |
| width: 1100px; |
| height: 1000px; |
| } |
| .fixed { |
| position: fixed; |
| top: 120px; |
| left: 60px; |
| width: 200px; |
| height: 150px; |
| background-color: rgba(0, 0, 0, 0.5); |
| padding: 20px; |
| box-sizing: border-box; |
| color: white; |
| box-shadow: 0 0 10px black; |
| } |
| |
| #container { |
| position: relative; |
| } |
| |
| .dot { |
| position: absolute; |
| width: 10px; |
| height: 10px; |
| background-color: orange; |
| } |
| </style> |
| <script> |
| if (window.testRunner) |
| testRunner.dumpAsText(); |
| |
| if (window.internals) |
| internals.settings.setAcceleratedCompositingForFixedPositionEnabled(true); |
| |
| function doTest() |
| { |
| setupDots(); |
| dumpLayers(); |
| } |
| |
| function setupDots() |
| { |
| var across = 40; |
| var down = 50; |
| var spacing = 20; |
| var container = document.getElementById('container'); |
| |
| for (var col = 0; col < across; ++col) { |
| for (var row = 0; row < down; ++row) { |
| var div = document.createElement('div'); |
| div.className = 'dot'; |
| div.style.left = (col * spacing) + 'px'; |
| div.style.top = (row * spacing) + 'px'; |
| |
| container.appendChild(div); |
| } |
| } |
| } |
| |
| function dumpLayers() |
| { |
| if (window.testRunner) { |
| document.getElementById('layers').innerText = window.internals.layerTreeAsText(document); |
| } |
| } |
| |
| window.addEventListener('load', doTest, false); |
| </script> |
| </head> |
| <body> |
| <div class="fixed"> |
| Fixed layer. |
| </div> |
| <div id="container"></div> |
| <pre id="layers"></pre> |
| </body> |
| </html> |
