gl-render.cc: framework OpenGL on MacOSX

[Thomas Treichl]

Hi,

I'm currently trying to compile gl-render.cc against Mac's OpenGL framework. If 
I compile against Mac's "X11/GL" then everything is just fine, but with 
"framework OpenGL" I have got problems. I already was able to do a hack for this:

gl-render.cc: In member function 'virtual void opengl_renderer::draw(const
axes::properties&)':
gl-render.cc:595: error: invalid conversion from 'int*' to 'GLint*'
gl-render.cc:595: error:   initializing argument 2 of 'void
glGetIntegerv(GLenum, GLint*)'
gl-render.cc: In member function 'virtual void
opengl_renderer::init_marker(const std::string&, double, float)':
gl-render.cc:2634: error: invalid conversion from 'int*' to 'GLint*'
gl-render.cc:2634: error:   initializing argument 2 of 'void
glGetIntegerv(GLenum, GLint*)'

but I'm not able to find out what the compiler wants from me for this:

gl-render.cc: In member function 'virtual void opengl_tesselator::init()':
gl-render.cc:273: error: invalid conversion from 'void (*)()' to 'GLvoid 
(*)(...)'
gl-render.cc:273: error:   initializing argument 3 of 'void
gluTessCallback(GLUtesselator*, GLenum, GLvoid (*)(...))'
gl-render.cc:275: error: invalid conversion from 'void (*)()' to 'GLvoid 
(*)(...)'
gl-render.cc:275: error:   initializing argument 3 of 'void
gluTessCallback(GLUtesselator*, GLenum, GLvoid (*)(...))'
gl-render.cc:277: error: invalid conversion from 'void (*)()' to 'GLvoid 
(*)(...)'
gl-render.cc:277: error:   initializing argument 3 of 'void
gluTessCallback(GLUtesselator*, GLenum, GLvoid (*)(...))'
gl-render.cc:279: error: invalid conversion from 'void (*)()' to 'GLvoid 
(*)(...)'
gl-render.cc:279: error:   initializing argument 3 of 'void
gluTessCallback(GLUtesselator*, GLenum, GLvoid (*)(...))'
gl-render.cc:281: error: invalid conversion from 'void (*)()' to 'GLvoid 
(*)(...)'
gl-render.cc:281: error:   initializing argument 3 of 'void
gluTessCallback(GLUtesselator*, GLenum, GLvoid (*)(...))'
gl-render.cc:283: error: invalid conversion from 'void (*)()' to 'GLvoid 
(*)(...)'
gl-render.cc:283: error:   initializing argument 3 of 'void
gluTessCallback(GLUtesselator*, GLenum, GLvoid (*)(...))'

Looking inside the OpenGL framework I get:

bash$ grep -re "gluTessCallback" /System/Library/Frameworks/OpenGL.framework/*
/System/Library/Frameworks/OpenGL.framework/Headers/glu.h:extern void
gluTessCallback (GLUtesselator* tess, GLenum which, GLvoid (*CallBackFunc)());

Looking inside X11R6/GL I get:

bash$ grep -re "gluTessCallback" /usr/X11R6/include/GL/*.h
/usr/X11R6/include/GL/glu.h:extern void gluTessCallback (GLUtesselator* tess,
GLenum which, _GLUfuncptr CallBackFunc);
bash$ grep -re "_GLUfuncptr" /usr/X11R6/include/GL/*.h
/usr/X11R6/include/GL/glu.h:typedef GLvoid (*_GLUfuncptr)();
/usr/X11R6/include/GL/glu.h:typedef GLvoid (*_GLUfuncptr)(GLvoid);

Can somebody please send me a suggestion what I should change?

The second question is: Are there any other platforms that have a header 
"OpenGL/gl.h" instead of "GL/gl.h" or do we just have this "OpenGL/gl.h" on Mac? 
I'm asking this question because I'd like to adjust the test procedure 
OCTAVE_OPENGL in aclocal.m4.

Best regards,

  Thomas