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(__CYGWIN__)  /* && !defined(USING_X) */
  28 #define WIN32
  29 #endif
  30
  31 #if defined(WIN32)  /* MINGW and MSC predefine WIN32 */
  32 # include <windows.h>
  33 #endif
  34
  35 #if !defined(WIN32)
  36 # include <dlfcn.h>
  37 #endif
  38
  39 #include <GL/gl.h>
  40
  41
  42 #if defined(__cplusplus)
  43 extern "C" {
  44 #endif
  45
  46 #ifndef APIENTRY
  47 #define APIENTRY
  48 #endif
  49
  50     // static bool SGSearchExtensionsString(char *extString, char *extName);
  51 bool SGIsOpenGLExtensionSupported(char *extName);
  52
  53 #ifdef __APPLE__
  54   // don't use an inline function for symbol lookup, since it is too big
  55   void* macosxGetGLProcAddress(const char *func);
  56 #endif
  57
  58 inline void (*SGLookupFunction(const char *func))()
  59 {
  60 #if defined( WIN32 )
  61     return (void (*)()) wglGetProcAddress(func);
  62
  63 #elif defined( __APPLE__ )
  64     return (void (*)()) macosxGetGLProcAddress(func);
  65
  66 #else // UNIX
  67
  68     // If the target system s UNIX and the ARB_get_proc_address
  69     // GLX extension is *not* guaranteed to be supported. An alternative
  70     // dlsym-based approach will be used instead.
  71
  72     void *libHandle;
  73     void (*fptr)();
  74     libHandle = dlopen("libGL.so", RTLD_LAZY);
  75     fptr = (void (*)()) dlsym(libHandle, func);
  76     dlclose(libHandle);
  77     return fptr;
  78 #endif
  79 }
  80
  81
  82
  83 /* OpenGL extension declarations */
  84
  85 /*
  86  * glPointParameterf and glPointParameterfv
  87  */
  88 #ifndef GL_EXT_point_parameters
  89 #define GL_EXT_point_parameters 1
  90 #define GL_POINT_SIZE_MIN_EXT                                   0x8126
  91 #define GL_DISTANCE_ATTENUATION_EXT                             0x8129
  92 #endif
  93
  94 #ifndef GL_ARB_point_parameters
  95 #define GL_ARB_point_parameters 1
  96 #define GL_POINT_SIZE_MIN_ARB                                   0x8126
  97 #define GL_DISTANCE_ATTENUATION_ARB                             0x8129
  98 #endif
  99
 100 typedef void (APIENTRY * glPointParameterfProc)(GLenum pname, GLfloat param);
 101 typedef void (APIENTRY * glPointParameterfvProc)(GLenum pname, const GLfloat *params);
 102
 103 /*
 104  * glActiveTextureARB
 105  */
 106
 107 #ifndef GL_ARB_multitexture
 108 #define GL_ARB_multitexture 1
 109 #define GL_TEXTURE0_ARB                                         0x84C0
 110 #define GL_TEXTURE1_ARB                                         0x84C1
 111 #define GL_TEXTURE2_ARB                                         0x84C2
 112 #define GL_TEXTURE3_ARB                                         0x84C3
 113 #define GL_TEXTURE4_ARB                                         0x84C4
 114 #define GL_TEXTURE5_ARB                                         0x84C5
 115 #define GL_TEXTURE6_ARB                                         0x84C6
 116 #define GL_TEXTURE7_ARB                                         0x84C7
 117 #define GL_TEXTURE8_ARB                                         0x84C8
 118 #define GL_TEXTURE9_ARB                                         0x84C9
 119 #define GL_TEXTURE10_ARB                                        0x84CA
 120 #define GL_TEXTURE11_ARB                                        0x84CB
 121 #define GL_TEXTURE12_ARB                                        0x84CC
 122 #define GL_TEXTURE13_ARB                                        0x84CD
 123 #define GL_TEXTURE14_ARB                                        0x84CE
 124 #define GL_TEXTURE15_ARB                                        0x84CF
 125 #define GL_TEXTURE16_ARB                                        0x84D0
 126 #define GL_TEXTURE17_ARB                                        0x84D1
 127 #define GL_TEXTURE18_ARB                                        0x84D2
 128 #define GL_TEXTURE19_ARB                                        0x84D3
 129 #define GL_TEXTURE20_ARB                                        0x84D4
 130 #define GL_TEXTURE21_ARB                                        0x84D5
 131 #define GL_TEXTURE22_ARB                                        0x84D6
 132 #define GL_TEXTURE23_ARB                                        0x84D7
 133 #define GL_TEXTURE24_ARB                                        0x84D8
 134 #define GL_TEXTURE25_ARB                                        0x84D9
 135 #define GL_TEXTURE26_ARB                                        0x84DA
 136 #define GL_TEXTURE27_ARB                                        0x84DB
 137 #define GL_TEXTURE28_ARB                                        0x84DC
 138 #define GL_TEXTURE29_ARB                                        0x84DD
 139 #define GL_TEXTURE30_ARB                                        0x84DE
 140 #define GL_TEXTURE31_ARB                                        0x84DF
 141 #define GL_ACTIVE_TEXTURE_ARB                                   0x84E0
 142 #define GL_CLIENT_ACTIVE_TEXTURE_ARB                            0x84E1
 143 #define GL_MAX_TEXTURE_UNITS_ARB                                0x84E2
 144 #endif
 145
 146 typedef void (APIENTRY * glActiveTextureProc)(GLenum texture);
 147
 148 /*
 149  * GL_EXT_separate_specular_color
 150  */
 151
 152 #ifndef GL_LIGHT_MODEL_COLOR_CONTROL
 153 #define GL_LIGHT_MODEL_COLOR_CONTROL                            0x81F8
 154 #define GL_SINGLE_COLOR                                         0x81F9
 155 #define GL_SEPARATE_SPECULAR_COLOR                              0x81FA
 156 #endif
 157
 158 #if defined(__cplusplus)
 159 }
 160 #endif
 161
 162 #endif // !__SG_EXTENSIONS_HXX
 163