Dennis, you said, you're planning to fix it in 1.4.16. Is it by any chance 
already fixed at
some branch or so? Could you provide some commit?

Regards,
Sebastian Tron
2011/12/21 Denis Oliver Kropp <d...@directfb.org>


> 
> > 
> On 12/20/11 11:12, Sebastian Tron wrote:
> > Hi,
> >
> > I got following error while executing my sample application:
> >
> > (!) [Main Thread       0.000] (27229) *** Assertion [surface->num_buffers > 
> > 0] failed *** [../../src/core/surface.h:324 in dfb_surface_get_buffer()]
> >
> > The problem occurs when I attempt to create window. But it happens only 
> > after cooperative level is switched to DFSCL_EXCLUSIVE or DFSCL_FULLSCREEN.
> >
> > I have found that when DFSCL_NORMAL cooperative level is switched to 
> > DFSCL_EXCLUSIVE or DFSCL_FULLSCREEN then following actions are performed:
> > - new layer context is created and activated,
> > - which causes previous context to be deactivated
> > - that destroys all buffers attached to previous context.
> >
> > When a new window is about to be created DirectFB refers to previous layer 
> > context as a primary context,
> > which assumes that its number of buffers is more than zero and performs 
> > division by number of buffers in function dfb_surface_get_buffer, unless 
> > assertion is enabled
> >
> > I reproduced such behaviour also using DirectFB 1.4.15.
> >
> > Could you give me a hint how to prevent such problems? Is there some bug in 
> > DirectFB or do I do something wrong?
> 
> 
> The deallocation if the layer buffers has been changed to not destroy the 
> buffers,
> but only the allocations. So it's a bug in the older versions. We're planning 
> for
> 1.4.16 very soon.
> 
> --
> Best regards,
>  Denis Oliver Kropp
> 
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> 



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