[MPlayer-dev-eng] MGA Xv sux...

[D Richard Felker III]

On Sat, Jul 20, 2002 at 05:33:44PM +0200, Arpi wrote:
> Hi,
> 
> > > > > > dma transfer support tp mga_vid/vidix/fbdev. I think SDL (which is
> > > > > i doubt it. sdl is an userspace lib... dma requires kernel space and
> > > > > deep knowledge of chip details. maybe directfb does it, i remember reading
> > > > > it somewhere, but i'm not sure.
> > > > 
> > > > Oh, I bet SDL just does accelerated video-to-video blits. That would
> > > I doubt it. What does 'accelerated blit' mean? It could be either CPU (memcpy
> > > maybe using MMX) or DMA (let the hardware to do that). I can't imagine any
> > 
> > DMA isn't needed if the source and destination image are already in
> > video memory.
> yes, but source is in system memory...
> if it's in video memory, it's called direct rendering then and we have no
> problems :)
> (video->video blit is nonsense, it's easier and faster to change the image
> pointer so the card displays the backbuffer wihtout moving it in memory)

Right. I said this has nothing to do with mplayer -- it's an SDL thing
for games and such.

Rich