[Dri-devel] Off-screen rendering question.

[Andrew P. <poliakov@u.washington.edu>]

Hi,

We have been using off-screen rendering with Mesa under X 3.3.6 on linux
to put some 3D graphics into dynamically generated web pages/applets (
various medical imaging tasks).

Upgrading to X 4.0.x created a major problem.  Programs compile and run
fine with glut, GLU and GL libraries included with X/DRI.  However,
off-screen rendering became an order of magnitude slower, as did
software only on-screen rendering.  It seems to be the case even if I
disable DRI, not load glx dri modules, etc.

Compiling and linking against stand alone Mesa did not do any good.

Am I missing something? Is there any way to reclaim the speed we had
before?

I would greatly appreciate any comment and suggestions.

Andrew

PS.  I noticed that several people on this list are interested in
hardware accelerated off-screen rendering, and some even wanted to work
on it.   This would be really great for web-based applications.   Is
there any hope of implementing it any time soon?  If someone is working
on it, I could spare some CPU cycles, do testing on several cards etc.