simgear/screen/extensions.hxx

   1 /*
   2  *
   3  * Copyright (c) 2001 César Blecua Udías    All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be included
  13  * in all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  16  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  18  * CESAR BLECUA UDIAS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  19  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
  20  * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  21  * SOFTWARE.
  22  *
  23  */
  24 #ifndef __SG_EXTENSIONS_HXX
  25 #define __SG_EXTENSIONS_HXX 1
  26
  27 #if defined(WIN32) && !defined(__CYGWIN__) && !defined(__MINGW32__)
  28 # include <windows.h>
  29 #else
  30 # include <dlfcn.h>
  31 #endif
  32
  33 #include <GL/gl.h>
  34
  35
  36 #if defined(__cplusplus)
  37 extern "C" {
  38 #endif
  39
  40 #ifndef APIENTRY
  41 #define APIENTRY
  42 #endif
  43
  44     // static bool SGSearchExtensionsString(char *extString, char *extName);
  45 bool SGIsOpenGLExtensionSupported(char *extName);
  46
  47 #ifdef __APPLE__
  48   // don't use an inline function for symbol lookup, since it is too big
  49   void* macosxGetGLProcAddress(const char *func);
  50 #endif
  51
  52 inline void (*SGLookupFunction(const char *func))()
  53 {
  54 #if defined( WIN32 ) && !defined(__CYGWIN__) && !defined(__MINGW32__)
  55     return (void (*)()) wglGetProcAddress(func);
  56
  57 #elif defined( __APPLE__ )
  58     return (void (*)()) macosxGetGLProcAddress(func);
  59
  60 #else // UNIX
  61
  62     // If the target system s UNIX and the ARB_get_proc_address
  63     // GLX extension is *not* guaranteed to be supported. An alternative
  64     // dlsym-based approach will be used instead.
  65
  66     void *libHandle;
  67     void (*fptr)();
  68     libHandle = dlopen("libGL.so", RTLD_LAZY);
  69     fptr = (void (*)()) dlsym(libHandle, func);
  70     dlclose(libHandle);
  71     return fptr;
  72 #endif
  73 }
  74
  75
  76
  77 /* OpenGL extension declarations */
  78
  79 /*
  80  * glPointParameterf and glPointParameterfv
  81  */
  82 #ifndef GL_EXT_point_parameters
  83 #define GL_EXT_point_parameters 1
  84 #define GL_POINT_SIZE_MIN_EXT                                   0x8126
  85 #define GL_DISTANCE_ATTENUATION_EXT                             0x8129
  86 #endif
  87
  88 #ifndef GL_ARB_point_parameters
  89 #define GL_ARB_point_parameters 1
  90 #define GL_POINT_SIZE_MIN_ARB                                   0x8126
  91 #define GL_DISTANCE_ATTENUATION_ARB                             0x8129
  92 #endif
  93
  94 typedef void (APIENTRY * glPointParameterfProc)(GLenum pname, GLfloat param);
  95 typedef void (APIENTRY * glPointParameterfvProc)(GLenum pname, const GLfloat *params);
  96
  97 /*
  98  * glActiveTextureARB
  99  */
 100
 101 #ifndef GL_ARB_multitexture
 102 #define GL_ARB_multitexture 1
 103 #define GL_TEXTURE0_ARB                                         0x84C0
 104 #define GL_TEXTURE1_ARB                                         0x84C1
 105 #define GL_TEXTURE2_ARB                                         0x84C2
 106 #define GL_TEXTURE3_ARB                                         0x84C3
 107 #define GL_TEXTURE4_ARB                                         0x84C4
 108 #define GL_TEXTURE5_ARB                                         0x84C5
 109 #define GL_TEXTURE6_ARB                                         0x84C6
 110 #define GL_TEXTURE7_ARB                                         0x84C7
 111 #define GL_TEXTURE8_ARB                                         0x84C8
 112 #define GL_TEXTURE9_ARB                                         0x84C9
 113 #define GL_TEXTURE10_ARB                                        0x84CA
 114 #define GL_TEXTURE11_ARB                                        0x84CB
 115 #define GL_TEXTURE12_ARB                                        0x84CC
 116 #define GL_TEXTURE13_ARB                                        0x84CD
 117 #define GL_TEXTURE14_ARB                                        0x84CE
 118 #define GL_TEXTURE15_ARB                                        0x84CF
 119 #define GL_TEXTURE16_ARB                                        0x84D0
 120 #define GL_TEXTURE17_ARB                                        0x84D1
 121 #define GL_TEXTURE18_ARB                                        0x84D2
 122 #define GL_TEXTURE19_ARB                                        0x84D3
 123 #define GL_TEXTURE20_ARB                                        0x84D4
 124 #define GL_TEXTURE21_ARB                                        0x84D5
 125 #define GL_TEXTURE22_ARB                                        0x84D6
 126 #define GL_TEXTURE23_ARB                                        0x84D7
 127 #define GL_TEXTURE24_ARB                                        0x84D8
 128 #define GL_TEXTURE25_ARB                                        0x84D9
 129 #define GL_TEXTURE26_ARB                                        0x84DA
 130 #define GL_TEXTURE27_ARB                                        0x84DB
 131 #define GL_TEXTURE28_ARB                                        0x84DC
 132 #define GL_TEXTURE29_ARB                                        0x84DD
 133 #define GL_TEXTURE30_ARB                                        0x84DE
 134 #define GL_TEXTURE31_ARB                                        0x84DF
 135 #define GL_ACTIVE_TEXTURE_ARB                                   0x84E0
 136 #define GL_CLIENT_ACTIVE_TEXTURE_ARB                            0x84E1
 137 #define GL_MAX_TEXTURE_UNITS_ARB                                0x84E2
 138 #endif
 139
 140 typedef void (APIENTRY * glActiveTextureProc)(GLenum texture);
 141
 142 /*
 143  * GL_EXT_separate_specular_color
 144  */
 145
 146 #ifndef GL_LIGHT_MODEL_COLOR_CONTROL
 147 #define GL_LIGHT_MODEL_COLOR_CONTROL                            0x81F8
 148 #define GL_SINGLE_COLOR                                         0x81F9
 149 #define GL_SEPARATE_SPECULAR_COLOR                              0x81FA
 150 #endif
 151
 152 #if defined(__cplusplus)
 153 }
 154 #endif
 155
 156 #endif // !__SG_EXTENSIONS_HXX
 157