Re: Xorg for amiga, need help

[Michael <macallan%netbsd.org@localhost>]

Hello,

On Fri, 25 Sep 2015 11:50:01 +0200
Frank Wille <frank%phoenix.owl.de@localhost> wrote:

> > Maybe take a look at a driver like xf86-video-suncg6 to see how to hook
> > acceleration functions into fb.
> 
> Thanks. That has been helpful.

That driver uses XAA, which will go away. Examples for simple EXA
drivers would be xf86-video-igs, -suntcx and -suncg14. Ok, the latter
isn't that simple with all the xrender stuff...
On 2nd thought, there's ffb_exa.c in the sunffb driver now.

> Drivers for the GPUs from S3 and Cirrus already exist, but adapting those
> for the Zorro bus and the grf(4) interface might be difficult. It's also
> the question if we want to clutter a standard driver with code from a
> platform which has only historic relevance.

Look at the xf86-video-ag10e driver - what I did there is to steal the
300SX specific acceleration code from the glint driver and made it work
with little to no change in a driver for a monstrosity that has a GLint
300SX and a bunch of other chips behind an SBus-PCI bridge.
I'm not saying it's necessarily a good example, but it's an example ;)

have fun
Michael