A small update:
I also made a r300_demo program that paints some triangles - it should be easier to setup than drmtest. This program should work on Radeon Mobility M10 cards (i.e. RV350).
best
Vladimir Dergachev
On Sat, 11 Sep 2004, Vladimir Dergachev wrote:
Hi all,
I have made some moderate progress in getting R300 3d to play nicely, you can see the results at
http://volodya-project.sf.net/R300.php
So people with Radeon R300 or later cards that want to experiment with
their powerful GPUs can try out the code and mess with it at the level fairly close to hardware, but not so close as to require a register manual
(which we don't have).
In particular two tools are now available:
glxtest - allows to exercise any 3d driver and dump contents of memory maps produced by 3d drawing commands.
There is a small utility to pretty print Radeon command stream and autogenerate C code based on it.
drmtest - paints a triangle and a square using RV350 GPU,
In order to better understand what is going on it helps to go to Microsoft site and read up on DirectX 9.0 - these cards were meant to work with it and thus many formats (and calls) are accepted as is.
In essense, description of DirectX 9.0 programmable shaders is a high-level description of the hardware - which is not that high, more like knee-level.
Also you might find examining the sources (or, at least, register headers) of Radeon drivers (Xorg, DRI, DRM, etc) useful.
have fun !
Vladimir Dergachev
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