Re: flicker graphics on window resize

[Riccardo Canalicchio]

from my debugging here the call stack of a resize:

...

NSWindow _processResizeEvent

  CairoContext GSSetDevice

  XGCairoModernSurface initWithDevice

  XGetWindowAttributes <-- HERE IS WHERE THE WINDOW BECOME WHITE (OR BLACK) XGCairoModernSurface.m:48

CairoContext handleExposeRect

XGCairoModernSurface handleExposeRect

...

and on the next XFlush the window get displayed

this mean that XGetWindowAttributes cause an error?

On 20 December 2013 17:20, Fred Kiefer <fredkiefer@gmx.de> wrote:

On 20.12.2013 11:03, Riccardo Canalicchio wrote:
> tell me If I'm right:
> - when using a buffered window there should be two cairo surfaces (back and
> front)
> - a window resize, trigger the re initialisation of all the two surfaces
> - actually the fresh new surfaces get drawn immediatly (in my case they are
> white)

The first two are true according to my understanding. For the third I am
not really sure. We should add some log statements in the class
CairoContext and monitor in which order the following methods get called
during resize and whether the correct surface object gets used:

+ (void) handleExposeRect: (NSRect)rect forDriver: (void *)driver
- (void) GSSetDevice: (void *)device : (int)x : (int)y

Hope this helps,
Fred