SDL 1.3 and GLEW

[npapier]

@Fugitive: A little tutorial is available here. I just update this wiki page and add a link on the doxygen documentation.

I plan to write an example using SDL/glut and of course expand the documentation.

[Fugitive]

It won't run on C++ Builder 2010 Trial Version.

Error: Declaration syntax error
 
in gl.h:
WINGDIAPI void APIENTRY glAccum (GLenum op, GLfloat value);

When doing it manually (without glew, gle etc), the last time I had that conflict was when I tried to include both gl3.h and gl.h at the same time...

[npapier]

This errror is typical when windows.h file is not included before the gl headers (for the symbol WINGDIAPI and APIENTRY).

In the beginning of gle/gle.hpp (included by gle/gl.h), you can find :

#ifdef WIN32

* * * * #if defined(_WIN32) && !defined(APIENTRY) && !defined(__CYGWIN__)
* * * * #define WIN32_LEAN_AND_MEAN 1
* * * * #ifndef NOMINMAX
* * * * #define NOMINMAX
* * * * #endif
* * * * #include <windows.h> // contains all WGL Functions.
* * * * #endif

* * * * #include <GL/gl.h>
* * * * #include <GL/glext.h>
* * * * #include <GL/wglext.h>
* * * * //#include <GL/glu.h>

#elif __MACOSX__

* * * * #define WINGDIAPI
* * * * #define APIENTRY
* * * * #include <GL/gl.h>
* * * * #include <GL/glext.h>
* * * * //#include <GL/glu.h>

* * * * //#include <OpenGL/gl.h>
* * * * //#include <OpenGL/glext.h>
* * * * //#include <OpenGL/glu.h>
* * * *
#else // POSIX

* * * * #define __STDC_VERSION__ * * * *199901L
* * * * #include <GL/gl.h>
* * * * #include <GL/glext.h>
* * * * //#include <GL/glx.h>
* * * * //#include <GL/glxext.h>
* * * * //#include <GL/glu.h>

#endif

So I suspect that the symbol WIN32 is not defined by Turbo C++. Try to add it to the project settings to fix this problem.

[Fugitive]

^I thought that I wouldnt have to re-include windows.h since it was already included as you pointed out. Anyhow, I did include it at the top, so thats fine.

It still doesnt recognize the class functions though. It could be that it doesnt recognize the dll that I converted to Borland format via implib, though I have not had much problems with doing that in the past.

gle::OpenGLExtensionsGen gleContext(std::cout); <== problem
gleContext.initialize();
gle::gleSetCurrent( gleContext );

[BCC32 Error] tutorialMain.cpp(109): E2285 Could not find a match for 'gle::OpenGLExtensionsGen::OpenGLExtensionsGen(ost ream)'

[npapier]

It still doesnt recognize the class functions though. It could be that it doesnt recognize the dll that I converted to Borland format via implib, though I have not had much problems with doing that in the past.

This is a problem at compilation stage and not at the linking stage. So the dll produced by implib has no influence.
Have you included the file OpenGLExtensionsGen.hpp using #include <gle/OpenGLExtensionsGen.hpp> ?

[idwakest]

Hi,

SDL and glew work fine together. You just have to specify which version of OpenGL you want to use before calling SDL_Init.

SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 2);
SDL_Init(SDL_INIT_VIDEO);
..
SDL_CreateWindow();
SDL_GL_CreateContext();
..
glewInit();


The tutorial (http://www.opengl.org/wiki/Tutorial2..._%28C_/_SDL%29) does not work because it creates a 2.1 OpenGL context and not a 3.2 as planned.

[przemo_li]

How exactly glew works?
After idwakest code, will I get only opengl 3.2 set of functions? Or all supported by driver?

Eg. how to get OGL4.1 (Core Profile if possible), with SDL and with glew.