Hi,
> I have added Overlay support the the i810 gfxdriver that I
> wrote. I noticed that rendering to the backbuffer is not
> supported. Significant 'tearing' effects can be seen when
> playing video using 'mplayer -vo directfb'. Mplayer, by
> default, blits or memcopies to the frontbuffer directly which
> causes the 'tearing' effects.
> I traced this to allocate_surface() which creates a surface
> with a DSCAPS_FRONTONLY capability. Is is possible that it
> also passes a DSCAPS_FLIPPING if config->buffermode ==
> DLBM_BACKVIDEO aside from writing a gfxdriver-specific
> xxxAllocateSurface?
>
> Because I wanted to eliminte this 'tearing' effect, I modified
> allocate_surface() so it also passes DSCAPS_FLIPPING
> depending on the buffermode. I also experimented with
> mplayer and modified it so it renders to the backbuffer then
> calls layer->Flip() afterwards. The tearing effects disappear
> this way. Also, flipping, instead of blitting, effectively
> bypasses the YV12 blit problem.
Because this is not first complain about tearing. I would like to change
Mplayer's code to support flipping for all cards.
So let me ask - how to create surface with flipping on "videolayer"?
I only found and use GetSurface - but this doesn't allow me or request
flipping.
Any hint appreciated
JS
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