common.h

#pragma once 
#ifndef KJY_OBJECT_ORIENTED_OPENGL_COMMON_H_
#define KJY_OBJECT_ORIENTED_OPENGL_COMMON_H_

#include <assert.h>

#define MAX(_A, _B) ((_A) > (_B) ? (_A) : (_B))
#define MIN(_A, _B) ((_A) < (_B) ? (_A) : (_B))
#define CLAMP(_A, _MIN, _MAX) ( _A > _MAX ? (_MAX) : (_A < _MIN ? (_MIN) : (_A) ) )
#define FNOT(_F) (1.0f - (_F))

#ifndef STRIFY
    #define _STRIFY(_PD) #_PD
    #define STRIFY(_PD) _STRIFY(_PD)
#endif

#define PING() {fprintf(stderr,"PING! (%d:%s)\n",__LINE__,__FILE__);}

#define _GLERR_SWITCH \
switch(__glErr__){\
    case 0x0500:\
        fprintf(stderr, "'Invalid OpenGL enum was passed to function.\n'");\
        break;\
    case 0x0501:\
        fprintf(stderr, "'Invalid value was passed to an OpenGL function.\n'");\
        break;\
    case 0x0502:\
        fprintf(stderr, "'Invalid operation error, the OpenGL state conflicted with a command.\n'");\
        break;\
    case 0x0503:\
        fprintf(stderr, "'OpenGL stack overflow.\n'");\
        break;\
    case 0x0504:\
        fprintf(stderr, "'OpenGL stack underflow.\n'");\
        break;\
    case 0x0505:\
        fprintf(stderr, "'OpenGL out of memory error!\n'");\
        break;\
    case 0x0506:\
        fprintf(stderr, "'Invalid framebuffer operation!\n'");\
        break;\
    case 0x0507:\
        fprintf(stderr, "'The OpenGL context was lost!\n'");\
        break;\
    \
}\

#define ASSERT_NO_GLERR() {\
    GLenum __glErr__ = glGetError();\
    if(__glErr__ != GL_NO_ERROR){\
        fprintf(stderr, "OpenGL Error caught on %s:%i\n", __FILE__, __LINE__);\
        _GLERR_SWITCH\
        assert(__glErr__ == GL_NO_ERROR);\
    }\
}

#define ASSERT_NO_GLERR_NOTE(_CALL) {\
    GLenum __glErr__ = glGetError();\
    if(__glErr__ != GL_NO_ERROR){\
        fprintf(stderr, "OpenGL Error caught on %s:%i for call:\n", __FILE__, __LINE__);\
        fprintf(stderr, "   '%s'\n", "" STRIFY((_CALL)) "" );\
        _GLERR_SWITCH\
        assert(__glErr__ == GL_NO_ERROR);\
    }\
}

#define _CHECK_BEFORE() {\
    GLenum __glErr__ = glGetError();\
    if(__glErr__ != GL_NO_ERROR){\
        fprintf(stderr, "OpenGL Error caught before %s:%i\n", __FILE__, __LINE__);\
        _GLERR_SWITCH\
        assert(__glErr__ == GL_NO_ERROR);\
    }\
}

#define CHECKED_GL_CALL(_CALL) _CHECK_BEFORE(); (_CALL); ASSERT_NO_GLERR_NOTE(_CALL)

/* Check these calls only if the following flag is enabled */
#ifndef OOOGL_CONDITIONAL_CHECKS
#define CONDITIONALLY_CHECKED_GL_CALL(_CALL) (_CALL)
#define CONDITIONALLY_ASSERT_NO_GLERR() ((void)0)
#else
#define CONDITIONALLY_CHECKED_GL_CALL(_CALL) CHECKED_GL_CALL(_CALL)
#define CONDITIONALLY_ASSERT_NO_GLERR() ASSERT_NO_GLERR()
#endif


#ifndef BASETYPES
    #define BASETYPES
    typedef unsigned UINT;
    typedef unsigned long ULONG;
    typedef ULONG *PULONG;
    typedef unsigned short USHORT;
    typedef USHORT *PUSHORT;
    typedef unsigned char UCHAR;
    typedef UCHAR *PUCHAR;
#endif


#endif