> > Nice sheme - this will even allow to check the software paths
> > by just tuning the GL version (e.g. via environment variable).
> >
> > But what will you do if your software path is not yet covered
> > by a specific OpenGL version but you still want to use it for
> > testing your experimental application?
>
> It doesn't help us much with that case, it's true. However
> we don't have that
> capability with the current scheme either.
>
> Keith
setenv GL_SOFTWARE_EXTENSIONS_FORCE="GL_gamma GL_RGBA GL_whatever"
setenv GL_SOFTWARE_EXTENSIONS_ALLOW="GL_gamma GL_RGBA GL_whatever"
if ( is_in_list(getev("GL_SOFTWARE_EXTENSIONS_FORCE"),"GL_EXT_texture3D") )
3D textures are a software fallback
else if ( extension string contains "GL_EXT_texture3D" )
3D textures are hardware accelerated
else if ( is_in_list(getev("GL_SOFTWARE_EXTENSIONS_ALLOW"),"GL_EXT_texture3D") )
3D textures are a software fallback
else if ( advertised OpenGL version >= 1.2 )
3D textures are a software fallback
else
3D textures are not supported at all
is_in_list() is some self designed function similar to strstr().
strstr() itself wouldn't work because some extensions
do represent substrings of others. trust me. ;-)
-Alex.
