Re: [Dri-devel] DRI Acceleration from Python/C Modules

[Brian P. <br...@pr...>]

Warren DeLano wrote:
> 
> I'm still working through this problem, but I am posting it now in case
> someone on the list knows of a trivial explanation...
> 
> I have a block of C code that calls the OpenGL API and runs fully
> accelerated with DRI as a stand-alone application.  However, when I wrap
> that code and import it as a Python module and call it from within
> Python, I don't seem to be getting any acceleration.
> 
> Is there a sure-fire way of telling whether hardware acceleration is
> being used for rendering?

It's always good to put calls to glGetString(GL_RENDERER), etc in
your application so that you can determine what's happening.  The
gears demo, for example, prints the GL strings when you specify the
-info option on the command line.


> ldd confirms that both the stand-alone application and the shared python
> module are calling the same set of libraries (X and GL)  What else could
> be wrong?

Are you using LIBGL_DRIVERS_PATH to specify the location of the DRI
drivers?  You can try setting LIBGL_DEBUG=verbose so that libGL will
print the path/filename of the DRI driver it's trying to use.

-Brian