Bug 30877 – [Qt] Display corruption when scrolling down in OSX

• Component: WebKit Qt
• Status: RESOLVED WORKSFORME

[Bernhard Rosenkraenzer]

Created attachment 42050 [details]
Screenshot showing the problem after scrolling down a few times

Scrolling down in a QWebView in OSX (the same application displaying the same content works well on Linux) leads to display corruption - it looks like a few pixels that need repainting are not repainted when scrolling down.
Refreshing the display (e.g. by switching to another application and back) fixes the corruption.
Scrolling up is ok.

[Benjamin Poulain]

I don't have the issue on Mac OS X.

Could you provide more information to reproduce the problem:
Which version of Qt? Which framework (Cocoa or Carbon)?
Which version of WebKit?
Do you see that on any QWebView?

[Kenneth Rohde Christiansen]

Sounds strange, I only know of a display corruption issue when using the QGraphicsWebView + open comboboxes

[Bernhard Rosenkraenzer]

Happens on any QWebView here with Qt 4.6 (and the version of QtWebKit that comes with it) built with Cocoa.

An otherwise identical build of Qt and the same code on Linux works perfectly.

[Benjamin Poulain]

I use the browser demo and Arora with 4.6.x cocoa 64 bits and the 4.7 branch cocoa 64 bits.

Is that on every page or on a specific page? Do you use a special graphic system (maybe try passing the option "-graphicssystem raster" to see if the graphics system is the issue)?