| <!DOCTYPE html> |
| |
| <html> |
| <head> |
| <style> |
| body { |
| overflow:hidden; /* prevent scrollbars and document height from affecting test output */ |
| height: 1000px; |
| } |
| .box { |
| margin: 10px; |
| height: 100px; |
| width: 300px; |
| padding: 4px; |
| background-color: silver; |
| } |
| </style> |
| <script> |
| if (window.testRunner) |
| testRunner.dumpAsText(); |
| |
| if (window.internals) |
| internals.compositingPolicyOverride = 'conservative'; |
| |
| function dumpLayers() |
| { |
| let canvas = document.getElementsByTagName('canvas')[0]; |
| var ctx = canvas.getContext('2d'); |
| ctx.fillStyle = 'white'; |
| ctx.fillRect(0, 0, canvas.width, canvas.height); |
| if (window.testRunner) |
| document.getElementById('layers').innerText = window.internals.layerTreeAsText(document); |
| } |
| |
| window.addEventListener('load', dumpLayers, false); |
| </script> |
| </head> |
| <body> |
| |
| <div class="box" style="transform: translate3d(10px, 1px, 1px)"> |
| <pre>transform: translate3d(10px, 1px, 1px)</pre> |
| Has backing under low memory. |
| </div> |
| |
| <div class="box" style="transform: translateZ(0)"> |
| <pre>transform: translateZ(0)</pre> |
| translateZ(0): No backing under low memory. |
| </div> |
| |
| <div class="box" style="transform: translate3d(10px, 1px, 0)"> |
| <pre>transform: translate3d(10px, 1px, 0)</pre> |
| No backing under low memory. |
| </div> |
| |
| <div class="box" style="will-change: transform"> |
| <pre>will-change: transform</pre> |
| No backing under low memory. |
| </div> |
| |
| <canvas class="box" style="box-shadow: 0 0 10px black"> |
| </canvas> |
| |
| <pre id="layers"></pre> |
| |
| </body> |
| </html> |
