git.maemo.org Git - neverball/blob - share/glext.h

   1 /*
   2  * Copyright (C) 2003-2011 Neverball authors
   3  *
   4  * NEVERBALL is  free software; you can redistribute  it and/or modify
   5  * it under the  terms of the GNU General  Public License as published
   6  * by the Free  Software Foundation; either version 2  of the License,
   7  * or (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT  ANY  WARRANTY;  without   even  the  implied  warranty  of
  11  * MERCHANTABILITY or  FITNESS FOR A PARTICULAR PURPOSE.   See the GNU
  12  * General Public License for more details.
  13  */
  14
  15 #ifndef GLEXT_H
  16 #define GLEXT_H
  17
  18 /*---------------------------------------------------------------------------*/
  19 /* Include the system OpenGL headers.                                        */
  20
  21 #ifdef _WIN32
  22 #define WIN32_LEAN_AND_MEAN
  23 #include <windows.h>
  24 #endif
  25
  26 #ifdef __APPLE__
  27 #include <OpenGL/gl.h>
  28 #else
  29 #include <GL/gl.h>
  30 #endif
  31
  32 #ifdef _WIN32
  33 #include <GL/glext.h>
  34 #endif
  35
  36 /*---------------------------------------------------------------------------*/
  37
  38 #ifndef GL_MULTISAMPLE
  39 #define GL_MULTISAMPLE                0x809D
  40 #endif
  41
  42 #ifndef GL_TEXTURE0
  43 #define GL_TEXTURE0                   0x84C0
  44 #endif
  45
  46 #ifndef GL_TEXTURE1
  47 #define GL_TEXTURE1                   0x84C1
  48 #endif
  49
  50 #ifndef GL_TEXTURE2
  51 #define GL_TEXTURE2                   0x84C2
  52 #endif
  53
  54 #ifndef GL_ARRAY_BUFFER
  55 #define GL_ARRAY_BUFFER               0x8892
  56 #endif
  57
  58 #ifndef GL_ELEMENT_ARRAY_BUFFER
  59 #define GL_ELEMENT_ARRAY_BUFFER       0x8893
  60 #endif
  61
  62 #ifndef GL_STATC_DRAW
  63 #define GL_STATIC_DRAW                0x88E4
  64 #endif
  65
  66 #ifndef GL_DYNAMIC_DRAW
  67 #define GL_DYNAMIC_DRAW               0x88E8
  68 #endif
  69
  70 #ifndef GL_POINT_SPRITE
  71 #define GL_POINT_SPRITE               0x8861
  72 #endif
  73
  74 #ifndef GL_COORD_REPLACE
  75 #define GL_COORD_REPLACE              0x8862
  76 #endif
  77
  78 #ifndef GL_POINT_DISTANCE_ATTENUATIAN
  79 #define GL_POINT_DISTANCE_ATTENUATION 0x8129
  80 #endif
  81
  82 /*---------------------------------------------------------------------------*/
  83
  84 int glext_check(const char *);
  85 int glext_init(void);
  86
  87 /*---------------------------------------------------------------------------*/
  88
  89 /* Exercise extreme paranoia in defining a cross-platform OpenGL interface.  */
  90 /* If we're compiling against OpenGL ES then we must assume native linkage   */
  91 /* of the extensions we use. Otherwise, GetProc them regardless of whether   */
  92 /* they need it or not.                                                      */
  93
  94 #if defined(GL_VERSION_ES_CM_1_0) || \
  95     defined(GL_VERSION_ES_CM_1_1) || \
  96     defined(GL_OES_VERSION_1_0)
  97
  98 #define ENABLE_OPENGLES 1
  99
 100 #define glClientActiveTexture_ glClientActiveTexture
 101 #define glActiveTexture_       glActiveTexture
 102 #define glGenBuffers_          glGenBuffers
 103 #define glBindBuffer_          glBindBuffer
 104 #define glBufferData_          glBufferData
 105 #define glBufferSubData_       glBufferSubData
 106 #define glDeleteBuffers_       glDeleteBuffers
 107 #define glIsBuffer_            glIsBuffer
 108 #define glPointParameterfv_    glPointParameterfv
 109
 110 #define glOrtho_               glOrthof
 111
 112 #else /* No native linkage?  Define the extension API. */
 113
 114 #define glOrtho_               glOrtho
 115
 116 /*---------------------------------------------------------------------------*/
 117 /* ARB_multitexture                                                          */
 118
 119 typedef void (*PFNGLACTIVETEXTURE_PROC)(GLenum);
 120 typedef void (*PFNGLCLIENTACTIVETEXTURE_PROC)(GLenum);
 121
 122 extern PFNGLCLIENTACTIVETEXTURE_PROC glClientActiveTexture_;
 123 extern PFNGLACTIVETEXTURE_PROC       glActiveTexture_;
 124
 125 /*---------------------------------------------------------------------------*/
 126 /* ARB_vertex_buffer_object                                                  */
 127
 128 typedef void      (*PFNGLGENBUFFERS_PROC)(GLsizei, GLuint *);
 129 typedef void      (*PFNGLBINDBUFFER_PROC)(GLenum, GLuint);
 130 typedef void      (*PFNGLBUFFERDATA_PROC)(GLenum, GLsizeiptr, const GLvoid *, GLenum);
 131 typedef void      (*PFNGLBUFFERSUBDATA_PROC)(GLenum, GLintptr, GLsizeiptr, const GLvoid *);
 132 typedef void      (*PFNGLDELETEBUFFERS_PROC)(GLsizei, const GLuint *);
 133 typedef GLboolean (*PFNGLISBUFFER_PROC)(GLuint);
 134
 135 extern PFNGLGENBUFFERS_PROC    glGenBuffers_;
 136 extern PFNGLBINDBUFFER_PROC    glBindBuffer_;
 137 extern PFNGLBUFFERDATA_PROC    glBufferData_;
 138 extern PFNGLBUFFERSUBDATA_PROC glBufferSubData_;
 139 extern PFNGLDELETEBUFFERS_PROC glDeleteBuffers_;
 140 extern PFNGLISBUFFER_PROC      glIsBuffer_;
 141
 142 /*---------------------------------------------------------------------------*/
 143 /* ARB_point_parameters                                                      */
 144
 145 typedef void (*PFNGLPOINTPARAMETERFV_PROC)(GLenum, const GLfloat *);
 146
 147 extern PFNGLPOINTPARAMETERFV_PROC glPointParameterfv_;
 148
 149 /*---------------------------------------------------------------------------*/
 150 #endif /* !ENABLE_OPENGLES */
 151
 152 void glClipPlane4f_(GLenum, GLfloat, GLfloat, GLfloat, GLfloat);
 153
 154 /*---------------------------------------------------------------------------*/
 155
 156 struct gl_info
 157 {
 158     GLint max_texture_units;
 159     GLint max_texture_size;
 160
 161     unsigned int multitexture:1;
 162     unsigned int vertex_buffer_object:1;
 163     unsigned int point_parameters:1;
 164 };
 165
 166 extern struct gl_info gli;
 167
 168 /*---------------------------------------------------------------------------*/
 169 #endif