Re: GGI, EGCS/PGCC, Kernel source

Wed, 25 Feb 1998 19:25:53 +0100 (CET)

On Wed, 25 Feb 1998, Jon M. Taylor wrote:

> GGI Descent now runs as fast in 640x480 as DOS Descent did in
> 320x200. This is with NO acceleration. You were saying?

my previous mail clearly states this:

> > (for windowing that is, some cool
> > games like Quake do their own stuff).

Quake, Descent and other 3D PC games have highly optimized assembly
routines to do 'direct rendering' into the framebuffer. They prepare
scanlines and put them out onto the card on a per-line basis. This
mechanizm circumvents any acceleration mechanizm.

X on the other hand mostly shuffles windows, menus, pixmaps, which can all
be accelerated nicely.

-- mingo

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