/*
	gl_func.h
	opengl function pointers
	make sure NOT to protect this file against multiple inclusions!

	$Id: gl_func.h,v 1.13 2007/02/13 16:56:00 sezero Exp $
*/

// whether to dlsym gl function calls
// the define GL_DLSYM is decided in the Makefile

#ifndef __GL_FUNC_EXTERN
#define __GL_FUNC_EXTERN extern
#endif

#if defined(GL_DLSYM)

#ifndef GL_FUNCTION
#define UNDEF_GL_FUNCTION
#define GL_FUNCTION(ret, func, params) \
typedef ret (APIENTRY *func##_f) params; \
__GL_FUNC_EXTERN func##_f func##_fp;
#endif

GL_FUNCTION(void, glBindTexture, (GLenum,GLuint))
GL_FUNCTION(void, glDeleteTextures, (GLsizei,const GLuint *))
GL_FUNCTION(void, glTexParameterf, (GLenum,GLenum,GLfloat))
GL_FUNCTION(void, glTexEnvf, (GLenum,GLenum,GLfloat))
GL_FUNCTION(void, glScalef, (GLfloat,GLfloat,GLfloat))
GL_FUNCTION(void, glTexImage2D, (GLenum,GLint,GLint,GLsizei,GLsizei,GLint,GLenum,GLenum,const GLvoid*))
GL_FUNCTION(void, glTexSubImage2D, (GLenum,GLint,GLint,GLint,GLsizei,GLsizei,GLenum,GLenum,const GLvoid *))

GL_FUNCTION(void, glBegin, (GLenum))
GL_FUNCTION(void, glEnd, (void))
GL_FUNCTION(void, glEnable, (GLenum))
GL_FUNCTION(void, glDisable, (GLenum))
GL_FUNCTION(GLboolean, glIsEnabled, (GLenum))

GL_FUNCTION(void, glFinish, (void))
GL_FUNCTION(void, glFlush, (void))
GL_FUNCTION(void, glClear, (GLbitfield))

GL_FUNCTION(void, glVertex2f, (GLfloat,GLfloat))
GL_FUNCTION(void, glVertex3f, (GLfloat,GLfloat,GLfloat))
GL_FUNCTION(void, glVertex3fv, (const GLfloat *))
GL_FUNCTION(void, glTexCoord2f, (GLfloat,GLfloat))
GL_FUNCTION(void, glTexCoord2fv, (const GLfloat *))
GL_FUNCTION(void, glColor4f, (GLfloat,GLfloat,GLfloat,GLfloat))
GL_FUNCTION(void, glColor4fv, (const GLfloat *))
GL_FUNCTION(void, glColor4ub, (GLubyte,GLubyte,GLubyte,GLubyte))
GL_FUNCTION(void, glColor4ubv, (const GLubyte *))
GL_FUNCTION(void, glColor3ubv, (const GLubyte *))
GL_FUNCTION(void, glColor3f, (GLfloat,GLfloat,GLfloat))
GL_FUNCTION(void, glClearColor, (GLclampf,GLclampf,GLclampf,GLclampf))

GL_FUNCTION(void, glAlphaFunc, (GLenum,GLclampf))
GL_FUNCTION(void, glBlendFunc, (GLenum,GLenum))
GL_FUNCTION(void, glShadeModel, (GLenum))
GL_FUNCTION(void, glPolygonMode, (GLenum,GLenum))
GL_FUNCTION(void, glDepthMask, (GLboolean))
GL_FUNCTION(void, glDepthRange, (GLclampd,GLclampd))
GL_FUNCTION(void, glDepthFunc, (GLenum))

GL_FUNCTION(void, glDrawBuffer, (GLenum))
GL_FUNCTION(void, glReadBuffer, (GLenum))
GL_FUNCTION(void, glReadPixels, (GLint,GLint,GLsizei,GLsizei,GLenum,GLenum, GLvoid *))
GL_FUNCTION(void, glHint, (GLenum,GLenum))
GL_FUNCTION(void, glCullFace, (GLenum))

GL_FUNCTION(void, glRotatef, (GLfloat,GLfloat,GLfloat,GLfloat))
GL_FUNCTION(void, glTranslatef, (GLfloat,GLfloat,GLfloat))

GL_FUNCTION(void, glOrtho, (GLdouble,GLdouble,GLdouble,GLdouble,GLdouble,GLdouble))
GL_FUNCTION(void, glFrustum, (GLdouble,GLdouble,GLdouble,GLdouble,GLdouble,GLdouble))
GL_FUNCTION(void, glViewport, (GLint,GLint,GLsizei,GLsizei))
GL_FUNCTION(void, glPushMatrix, (void))
GL_FUNCTION(void, glPopMatrix, (void))
GL_FUNCTION(void, glLoadIdentity, (void))
GL_FUNCTION(void, glMatrixMode, (GLenum))
GL_FUNCTION(void, glLoadMatrixf, (const GLfloat *))

GL_FUNCTION(const GLubyte*, glGetString, (GLenum))
GL_FUNCTION(void, glGetFloatv, (GLenum,GLfloat *))
GL_FUNCTION(void, glGetIntegerv, (GLenum,GLint *))

GL_FUNCTION(void, glStencilFunc, (GLenum,GLint,GLuint))
GL_FUNCTION(void, glStencilOp, (GLenum,GLenum,GLenum))
GL_FUNCTION(void, glClearStencil, (GLint))

#ifdef UNDEF_GL_FUNCTION
#undef GL_FUNCTION
#undef UNDEF_GL_FUNCTION
#endif

#else

#define glBindTexture_fp	glBindTexture
#define glDeleteTextures_fp	glDeleteTextures
#define glTexParameterf_fp	glTexParameterf
#define glTexEnvf_fp		glTexEnvf
#define glScalef_fp		glScalef
#define glTexImage2D_fp		glTexImage2D
#define glTexSubImage2D_fp	glTexSubImage2D

#define glBegin_fp		glBegin
#define glEnd_fp		glEnd
#define glEnable_fp		glEnable
#define glDisable_fp		glDisable
#define glIsEnabled_fp		glIsEnabled
#define glFinish_fp		glFinish
#define glFlush_fp		glFlush
#define glClear_fp		glClear

#define glVertex2f_fp		glVertex2f
#define glVertex3f_fp		glVertex3f
#define glVertex3fv_fp		glVertex3fv
#define glTexCoord2f_fp		glTexCoord2f
#define glTexCoord2fv_fp	glTexCoord2fv
#define glColor4f_fp		glColor4f
#define glColor4fv_fp		glColor4fv
#define glColor4ub_fp		glColor4ub
#define glColor4ubv_fp		glColor4ubv
#define glColor3ubv_fp		glColor3ubv
#define glColor3f_fp		glColor3f
#define glClearColor_fp		glClearColor

#define glAlphaFunc_fp		glAlphaFunc
#define glBlendFunc_fp		glBlendFunc
#define glShadeModel_fp		glShadeModel
#define glPolygonMode_fp	glPolygonMode
#define glDepthMask_fp		glDepthMask
#define glDepthRange_fp		glDepthRange
#define glDepthFunc_fp		glDepthFunc

#define glDrawBuffer_fp		glDrawBuffer
#define glReadBuffer_fp		glReadBuffer
#define glReadPixels_fp		glReadPixels
#define glHint_fp		glHint
#define glCullFace_fp		glCullFace

#define glRotatef_fp		glRotatef
#define glTranslatef_fp		glTranslatef

#define glOrtho_fp		glOrtho
#define glFrustum_fp		glFrustum
#define glViewport_fp		glViewport
#define glPushMatrix_fp		glPushMatrix
#define glPopMatrix_fp		glPopMatrix
#define glLoadIdentity_fp	glLoadIdentity
#define glMatrixMode_fp		glMatrixMode
#define glLoadMatrixf_fp	glLoadMatrixf

#define glGetString_fp		glGetString
#define glGetFloatv_fp		glGetFloatv
#define glGetIntegerv_fp	glGetIntegerv

#define glStencilFunc_fp	glStencilFunc
#define glStencilOp_fp		glStencilOp
#define glClearStencil_fp	glClearStencil

#endif	// !defined(GL_DLSYM)


// always link to these at runtime

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

GL_FUNCTION_OPT(void, glActiveTextureARB, (GLenum))
GL_FUNCTION_OPT(void, glMultiTexCoord2fARB, (GLenum,GLfloat,GLfloat))

#ifdef UNDEF_GL_FUNCTION_OPT
#undef GL_FUNCTION_OPT
#undef UNDEF_GL_FUNCTION_OPT
#endif