[Gridflow-dev] OpenGL wrangling

Mathieu Bouchard matju at artengine.ca
Mon Aug 9 20:09:40 EDT 2010

On Mon, 9 Aug 2010, Claude Heiland-Allen wrote:

> Despite having a recent GPU with up-to-date drivers, I can't compile GridFlow 
> SVN trunk with opengl as my gl.h is only for 1.1 [1], and moreover one 
> function used is in an optional part of the specification.
> glBlendEquation requires GL_ARB_imaging extension
> glTexImage3D, glTexSubImage3D, glCopyTexSubImage3D require GL >= 1.2
> glLoadTransposeMatrix, glMultTransposeMatrixf require GL >= 1.3
> My standard workaround is to use GLEW[2] which usually makes things just 
> work (unless a function really isn't supported, in which case the 
> function pointer is 0 - shifting existence checks from compile-time to 
> run-time has some problems too of course...).  I don't know how this 
> would interact with Gem's usage (or not) of GLEW, though.

I added checks for null pointers for the methods you mentioned, except the 
ARB. Does it look ok ? Should I do it with all the ARB as well ?

Do you have anything else that still doesn't compile ? (macro constants 
not found and stuff)

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| Mathieu Bouchard, Montréal, Québec. téléphone: +1.514.383.3801

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