Thanks Bert,

I'm still not comfortable with FFI stuff, and my NuBlue book is
back in Atlanta.  I suppose that I have to get an ExternalLibraryFunction
for wglGetProcAddress(), which I should then invoke to get the functions
I need. 

(giving it a try)

I gave this a try, but was unsuccessful.  The following code (executed
in a workspace) resulted in an ExternalLibraryFunction with a null
handle.

func _ ExternalLibraryFunction 
		name: 'glGetString'
		module: 'opengl32.dll' 
		callType: ExternalFunction callTypeAPI "callTypeCDecl"
		returnType: ExternalType string
		argumentTypes: {ExternalType long}.

I tried it with both call types; neither worked.  Ideas, anyone?

Thanks again,
Joshua



On Sat, Dec 21, 2002 at 11:15:22PM +0100, Bert Freudenberg wrote:
> Am Samstag, 21.12.02 um 22:09 Uhr schrieb Joshua 'Schwa' Gargus:
> > I was wondering how to access the OpenGL ARB_imaging functions from
> > withing Croquet.  Whenever I try, I get the error "Unable to find
> > function address".  I used glGetString(GL_EXTENSIONS) to verify that
> > GL_ARB_imaging is supported.  I thing that the problem is the
> > opengl32.dll doesn't provide the appropriate hooks (stupid Microsoft),
> > even though NVIDIA's driver implements the functionality.
> 
> For all OpenGL extension functions, you have to get a function pointer 
> yourself using the wglGetProcAddress() function. (glXGetProcAddress on 
> X, don't know on Mac). On Windows, you even have to get the OpenGL 1.3 
> and 1.4 functions this way since Microsoft did not update their 
> bindings in years.
> 
> -- Bert
>