Is it possible? Currently SDL_GL_SetAttribute lets me set 4.1 but I
also had to use GLEW (another library) so that the newer functions of
GL weren’t undefined.
A #define GL_GLEXT_PROTOTYPES on top of it let it find the functions
in the opengl SDL header but there were still undefined on linking.
Hello Michael,
Yes I think that this is possible, but you have to retrieve the function
pointers manually. I have a small project using Opengl 3.3 core and that’s
what i’m using right now:
REMEMBER TO DOWNLOAD THE gl3.h file from
http://www.opengl.org/registry/api/gl3.h
#include <GL3/gl3.h>
#include <SDL.h>
extern PFNGLCLEARCOLORPROC glClearColor;
extern PFNGLGETSTRINGPROC glGetString;
extern PFNGLGETINTEGERVPROC glGetIntegerv;
extern PFNGLGETSTRINGIPROC glGetStringi;
extern PFNGLCLEARPROC glClear;
extern PFNGLVIEWPORTPROC glViewport;
extern PFNGLENABLEPROC glEnable;
extern PFNGLPOLYGONMODEPROC glPolygonMode;
…
…
…
PFNGLCLEARCOLORPROC glClearColor = NULL;
PFNGLGETSTRINGPROC glGetString = NULL;
PFNGLGETINTEGERVPROC glGetIntegerv = NULL;
PFNGLGETSTRINGIPROC glGetStringi = NULL;
PFNGLCLEARPROC glClear = NULL;
PFNGLVIEWPORTPROC glViewport= NULL;
PFNGLENABLEPROC glEnable=NULL;
PFNGLPOLYGONMODEPROC glPolygonMode=NULL;
…
…
Now retrieve the function pointers using SDL:
glClearColor = (PFNGLCLEARCOLORPROC) SDL_GL_GetProcAddress(“glClearColor”);
glGetString = (PFNGLGETSTRINGPROC)SDL_GL_GetProcAddress(“glGetString”);
glGetIntegerv = (PFNGLGETINTEGERVPROC)SDL_GL_GetProcAddress(“glGetIntegerv”);
glGetStringi = (PFNGLGETSTRINGIPROC)SDL_GL_GetProcAddress(“glGetStringi”);
glClear = (PFNGLCLEARPROC)SDL_GL_GetProcAddress(“glClear”);
glViewport = (PFNGLVIEWPORTPROC)SDL_GL_GetProcAddress(“glViewport”);
glEnable = (PFNGLENABLEPROC)SDL_GL_GetProcAddress(“glEnable”);
glPolygonMode=(PFNGLPOLYGONMODEPROC)SDL_GL_GetProcAddress(“glPolygonMode”);
…
…
Now you can use the functions in your program 
I don’t know if there is another way to do it, but that one works well for
me.
Salut!
2011/1/17 Michael Menegakis
Is it possible? Currently SDL_GL_SetAttribute lets me set 4.1 but I
also had to use GLEW (another library) so that the newer functions of
GL weren’t undefined.A #define GL_GLEXT_PROTOTYPES on top of it let it find the functions
in the opengl SDL header but there were still undefined on linking.
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