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/* bzflag
* Copyright (c) 1993 - 2005 Tim Riker
*
* This package is free software; you can redistribute it and/or
* modify it under the terms of the license found in the file
* named COPYING that should have accompanied this file.
*
* THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#ifndef __BZFGL_H__
#define __BZFGL_H__
/** this file contains headers necessary for opengl */
#ifdef __APPLE__
# include <OpenGL/OpenGL.h>
# include <OpenGL/gl.h>
# include <OpenGL/glu.h>
#else
# include <GL/gl.h>
# include <GL/glu.h>
#endif
#ifndef GL_VERSION_1_1
# error OpenGL version 1.1 functionality is required
#endif
/* These will track glBegin/End pairs to make sure that they match */
#ifdef DEBUG
#include <assert.h>
extern int __beginendCount;
#define glBegin(_value) {\
if (__beginendCount==0) { \
__beginendCount++;\
} else {\
std::cerr << "ERROR: glBegin called on " << __FILE__ << ':' << __LINE__ << " without calling glEnd before\n"; \
assert(__beginendCount==0 && "glBegin called without glEnd"); \
} \
glBegin(_value);\
}
#define glEnd() {\
if (__beginendCount==0) { \
std::cerr << "ERROR: glEnd called on " << __FILE__ << ':' << __LINE__ << " without calling glBegin before\n"; \
assert(__beginendCount!=0 && "glEnd called without glBegin"); \
} else {\
__beginendCount--;\
} \
glEnd();\
}
#endif
// glGenTextures() should never return 0
#define INVALID_GL_TEXTURE_ID ((GLuint) 0)
// glGenLists() will only return 0 for errors
#define INVALID_GL_LIST_ID ((GLuint) 0)
/* Protect us from ourselves. Warn when these
* are called inside of the wrong context code
* sections (freeing and initializing).
*/
//#define DEBUG_GL_MATRIX_STACKS
#ifdef DEBUG
# define glNewList(list,mode) bzNewList((list), (mode))
# define glGenLists(count) bzGenLists((count))
# define glGenTextures(count, textures) bzGenTextures((count), (textures))
# ifdef DEBUG_GL_MATRIX_STACKS
# define glPushMatrix() bzPushMatrix()
# define glPopMatrix() bzPopMatrix()
# define glMatrixMode(mode) bzMatrixMode(mode)
# endif // DEBUG_GL_MATRIX_STACKS
#endif
// always swap these calls (context protection)
#define glDeleteLists(base, count) bzDeleteLists((base), (count))
#define glDeleteTextures(count, textures) bzDeleteTextures((count), (textures))
// these are housed at the end of OpenGLGState.cxx, for now
extern void bzNewList(GLuint list, GLenum mode);
extern GLuint bzGenLists(GLsizei count);
extern void bzGenTextures(GLsizei count, GLuint *textures);
extern void bzDeleteLists(GLuint base, GLsizei count);
extern void bzDeleteTextures(GLsizei count, const GLuint *textures);
extern void bzPushMatrix();
extern void bzPopMatrix();
extern void bzMatrixMode(GLenum mode);
#endif /* __BZFGL_H__ */
// Local Variables: ***
// mode: C++ ***
// tab-width: 8 ***
// c-basic-offset: 2 ***
// indent-tabs-mode: t ***
// End: ***
// ex: shiftwidth=2 tabstop=8
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