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[directfb-dev] Re: blanking of non-refreshing windows
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[directfb-dev] Re: blanking of non-refreshing windows

On Tue, 2003-09-09 at 17:07, Denis Oliver Kropp wrote:
> Quoting Michel Dänzer (
> > On Thu, 2003-08-21 at 23:12, Andy Isaacson wrote:
> > > In general I want the system to work correctly an in a performant 
> > > manner even if the number of windows exceeds available off-screen 
> > > framebuffer memory.
> > 
> > It would be interesting how it performs in that case indeed; I don't
> > expect it to be too bad though as it was quite usable even without any
> > hardware acceleration.
> The surface manager of DirectFB kicks out older window surfaces if
> no free space is available. Only if many windows overlap while
> being transparent, it could slow down noticably, because all windows
> are needed to recompose the stack. But with a 32MB card I have space
> for many windows ;)

Can you DMA them to main memory using run length compression?

Torgeir Veimo <>

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