Re: [Mesa3d-users] Win32-Using Mesa and standard GL simultaneously

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

jan...@st... wrote:
> 
> Hello!
> 
> I'm working on a (Visual C++ 6) project in which I would like to use Mesa's
> offscreen rendering capabilities. The problem is that I also have to use the
> standard OpenGL libraries for OpenGL and Open Inventor rendering.
> 
> This obviously creates some problems because of the identical APIs of the
> libraries.
> 
> My question is: Is there a simple way to "switch" between the two APIs, i.e. to
> expicitly select Mesa OR standard OpenGL when e.g. calling "glClear(...)".
> 
> Or, as an alternative: Are there special versions of the Mesa GL commands
> (like "mesa_glClear()" or something similar)?

Yes, there's an option for that called "mangling".  If you recompile
Mesa with USE_MGL_NAMESPACE then all of Mesa's OpenGL entrypoints
will start with "mgl" instead of "gl".  How you switch between the
mgl and gl calls in your application is up to you.

-Brian