3d related stuff

Experimental stereo support for DRI (updated 2000-11-30)

I've just gotten 2d acceleration to work in conjunction with stereo support in the mga driver. It is somewhat ugly but I think the basic design has some promise at least. I guess I should integrate the stereo module into XAA though.

Notes

You need to enable the Stereo option in your mga Screen section.
The patch isn't against the current CVS tree but against a tree that is perhaps a week or so old.
Xv is probably broken in stereo mode.
I have no idea wether the new RENDER extension is working.
I haven't intentionally broken 32bpp support but I haven't tested it either. If it is broken it is not badly broken at least.
Rendering to the frontbuffer is broken in non stereo applications running in stereomode.
On a similar note, rendering to more than one buffer simultaneously in a stereo application has not been tested yet.
The driver will switch between the left and right frontbuffer during the vertical blank. You will need shutter glasses that can detect this automatically. Personally I use the Eye 3d glasses from I-Art.
In all honesty I used quite a lot of Voodoo programming while programming this. That is, I'm not very sure about the 2d acceleration support. It seems solid but I haven't done any real tests yet.

The patch

mga-stereo-rev2.diff The patch against a week or so old CVS tree. Might apply to the latest tree. If it doesn't I'll try to fix it later on.
stereo-rev2.tar.gz The stereo module. This isn't included in the patch above since I couldn't figure out a way to get cvs diff to include a directory not present on the server.

Stereoscopic related pages

http://www.swin.edu.au/astronomy/pbourke/opengl/ - Some stereo related programs and tutorials on this page. The 3D Stereo OpenGL example is interesting. (The demo included runs pretty slow on the G400 unless you remove the glEnable(GL_POLYGON_SMOOTH); though.) The Tunnel demo is also pretty nice. The same author is also responsible for http://www.swin.edu.au/astronomy/pbourke/stereographics/ which has some additional stereographics information.
http://www.stereographics.com has some interesting stereographics related information. http://www.stereographics.com/html/pcsdk.htm is particularly interesting.
http://www.stereo3d.com/ has some information mostly related to consumer level gaming on the windows platform but it might just be the place to visit if you are interested in such :)

Allocating large physical regions on Solaris

As an experiment I wrote a kernel module to allow allocation of large physical memory regions on Solaris in order to support DMA and direct rendering in Utah. I haven't really tested it much and the code got quite ugly since the module architecture in Solaris wasn't really compatible with my intentions. I learned something about Solaris while doing it though.

physmap.tar.gz - The kernel module.
glx-physmap.diff A patch to implement physmap support in Utah GLX.

Undocumented "features"

During OpenGL driver development one will usually stumble upon some interesting undocumented features. I have for some reason not deleted these screenshots and I figured that some people as depraved as me might get amused by watching them :)

warp.jpg This is probably the most spectacular bugs I've produced to date. This occured since I didn't read the warp DDK thoroughly before starting to play with the warp engine on the G200...
offset-texture-1.jpg, offset-texture-2.jpg - "What did you say again? :)" This bug was caused by a small bug in the texturing code in Utah's G400 driver.

Andreas Ehliar - ehliar@lysator.liu.se