[SDL] Re: Bizarre(?) per-pixel alpha vs. no alpha benchmark results (0/1)

[Randi J. Relander]

David Olofson wrote:
>
> Andy Sy wrote:
> >
> > 120Hz 640x480 16-bit full screen, SWSURFACE
> >                             DOUBLEBUF    no DOUBLEBUF
> > =====================================================
> > plain opaque blit:          120 fps      71 fps (!)
> > per pixel alpha :           24  fps(!)   80 fps
> > per pixel alpha + RLEACCEL: 30  fps(!)   95 fps
>
> My first reflection: "Someone is reading VRAM here..."
>

DOUBLEBUF forces HWSURFACE ...

- Randi

Regimental Command
Generic Armored Combat System
http://regcom.sourceforge.net