/*
	wgl_func.h
	WGL functions we may need to link to
	make sure NOT to protect this file against multiple inclusions!

	$Id: wgl_func.h,v 1.4 2007/03/14 21:04:13 sezero Exp $
*/

#ifdef GL_DLSYM
// These we can't do without
#ifndef GL_FUNCTION
#define UNDEF_GL_FUNCTION
#define GL_FUNCTION(ret, func, params) \
typedef ret (WINAPI *func##_f) params; \
func##_f func##_fp;
#endif

GL_FUNCTION(PROC, wglGetProcAddress, (LPCSTR))
GL_FUNCTION(HGLRC, wglCreateContext, (HDC))
GL_FUNCTION(BOOL, wglDeleteContext, (HGLRC))
GL_FUNCTION(BOOL, wglMakeCurrent, (HDC, HGLRC))
GL_FUNCTION(HGLRC, wglGetCurrentContext, (VOID))
GL_FUNCTION(HDC, wglGetCurrentDC, (VOID))

#ifdef UNDEF_GL_FUNCTION
#undef GL_FUNCTION
#undef UNDEF_GL_FUNCTION
#endif

#else

#define wglGetProcAddress_fp	wglGetProcAddress
#define wglCreateContext_fp	wglCreateContext
#define wglDeleteContext_fp	wglDeleteContext
#define wglMakeCurrent_fp	wglMakeCurrent
#define wglGetCurrentContext_fp	wglGetCurrentContext
#define wglGetCurrentDC_fp	wglGetCurrentDC

//#define wglGetExtensionsStringARB_fp	wglGetExtensionsStringARB
//#define wglSwapBuffers_fp		wglSwapBuffers
//#define wglSwapIntervalEXT_fp		wglSwapIntervalEXT

#endif


// These are optional

#ifndef GL_FUNCTION_OPT
#define UNDEF_GL_FUNCTION_OPT
#define GL_FUNCTION_OPT(ret, func, params) \
typedef ret (WINAPI *func##_f) params; \
func##_f func##_fp;
#endif

GL_FUNCTION_OPT(const char *, wglGetExtensionsStringARB, (HDC hdc))
GL_FUNCTION_OPT(BOOL, wglSwapBuffers, (HDC))
GL_FUNCTION_OPT(BOOL, wglSwapIntervalEXT, (int))

#ifdef UNDEF_GL_FUNCTION_OPT
#undef GL_FUNCTION_OPT
#undef UNDEF_GL_FUNCTION_OPT
#endif