| <!DOCTYPE html> |
| <html> |
| <head> |
| <title>Check whether scrollable iframes have tile backing</title> |
| <script> |
| if (window.internals) |
| window.internals.settings.setAsyncFrameScrollingEnabled(true); |
| |
| if (window.testRunner) { |
| testRunner.dumpAsText(); |
| testRunner.waitUntilDone(); |
| } |
| |
| function doTest() |
| { |
| if (window.internals && window.testRunner) { |
| document.getElementById('layers').innerText = internals.layerTreeAsText(document, internals.LAYER_TREE_INCLUDES_VISIBLE_RECTS | internals.LAYER_TREE_INCLUDES_TILE_CACHES | internals.LAYER_TREE_INCLUDES_BACKING_STORE_ATTACHED); |
| testRunner.notifyDone(); |
| } |
| } |
| |
| var frameToLoadCount = 3; |
| function newFrameLoaded() { |
| frameToLoadCount--; |
| if (frameToLoadCount === 0) |
| doTest(); |
| } |
| </script> |
| <style> |
| frame { |
| width: 200px; |
| height: 100px; |
| } |
| </style> |
| </head> |
| <body> |
| <iframe onload="newFrameLoaded()" scrolling="yes" srcdoc="<html style=' |
| background: transparent; |
| height: 300px; width: 400px;'></html>"></iframe> |
| <iframe onload="newFrameLoaded()" scrolling="yes" srcdoc="<html style=' |
| background: #ABCDEF; |
| height: 300px; width: 400px;'></html>"></iframe> |
| <iframe onload="newFrameLoaded()" scrolling="yes" srcdoc="<html style=' |
| background-image: linear-gradient(45deg, black, white); |
| background-attachment: fixed; |
| height: 300px; width: 400px;'></html>"></iframe> |
| <pre id="layers">Layer tree goes here</pre> |
| </body> |
| </html> |
