Bug 40778

Summary: [Qt] -webkit-transition-delay causes problems with GraphicsLayer
Product: WebKit Reporter: Kevin Simons <kevin.simons>
Component: New BugsAssignee: Nobody <webkit-unassigned>
Severity: Normal CC: noam
Priority: P2    
Version: 528+ (Nightly build)   
Hardware: PC   
OS: Linux   
Description Flags
Test with run-launcher -graphics-based none

Description Kevin Simons 2010-06-17 08:36:42 PDT
Created attachment 58997 [details]
Test with run-launcher -graphics-based

Attached is an example of a CSS transform that causes rendering/animation issues with GraphicsLayer/accelerated compositing (i.e. when QWebSettings::AcceleratedCompositingEnabled is true).

The example shows two boxes. When you click the screen, the right box (which is initially hidden) moves to the left and transforms to opacity 1, while the left box moves to the right and transforms to opacity 0 with a slight delay (using -webkit-transition-delay).

When AC is not enabled, the transforms work properly, but when it is enabled the box with the delayed animation disappears and then does not start it's transform until the other box finishes. Without the delay everything works fine with or without AC.
Comment 1 Noam Rosenthal 2010-06-23 23:48:38 PDT
This might be a duplicate of 40846
Comment 2 Noam Rosenthal 2010-06-25 13:20:21 PDT

*** This bug has been marked as a duplicate of bug 40846 ***