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  * OpenGL 1.2 and 1.3 enumerants
  83  */
  84
  85 #ifndef GL_VERSION_1_2
  86 #define GL_CLAMP_TO_EDGE                                        0x812F
  87 #define GL_TEXTURE_WRAP_R                                       0x8072
  88 #define GL_BLEND_EQUATION                                       0x8009
  89 #define GL_MIN                                                  0x8007
  90 #define GL_MAX                                                  0x8008
  91 #define GL_FUNC_ADD                                             0x8006
  92 #define GL_FUNC_SUBTRACT                                        0x800A
  93 #define GL_FUNC_REVERSE_SUBTRACT                                0x800B
  94 #define GL_BLEND_COLOR                                          0x8005
  95 #define GL_CONSTANT_COLOR                                       0x8001
  96 #define GL_ONE_MINUS_CONSTANT_COLOR                             0x8002
  97 #define GL_CONSTANT_ALPHA                                       0x8003
  98 #define GL_ONE_MINUS_CONSTANT_ALPHA                             0x8004
  99 #endif
 100
 101 typedef void (APIENTRY * glBlendEquationProc) (GLenum mode );
 102 typedef void (APIENTRY * glBlendColorProc) (GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha );
 103
 104
 105 /* OpenGL extension declarations */
 106
 107 /*
 108  * glPointParameterf and glPointParameterfv
 109  */
 110 #ifndef GL_EXT_point_parameters
 111 #define GL_EXT_point_parameters 1
 112 #define GL_POINT_SIZE_MIN_EXT                                   0x8126
 113 #define GL_DISTANCE_ATTENUATION_EXT                             0x8129
 114 #endif
 115
 116 #ifndef GL_ARB_point_parameters
 117 #define GL_ARB_point_parameters 1
 118 #define GL_POINT_SIZE_MIN_ARB                                   0x8126
 119 #define GL_DISTANCE_ATTENUATION_ARB                             0x8129
 120 #endif
 121
 122 typedef void (APIENTRY * glPointParameterfProc)(GLenum pname, GLfloat param);
 123 typedef void (APIENTRY * glPointParameterfvProc)(GLenum pname, const GLfloat *params);
 124
 125 /*
 126  * glActiveTextureARB
 127  */
 128
 129 #ifndef GL_ARB_multitexture
 130 #define GL_ARB_multitexture 1
 131 #define GL_TEXTURE0_ARB                                         0x84C0
 132 #define GL_TEXTURE1_ARB                                         0x84C1
 133 #define GL_TEXTURE2_ARB                                         0x84C2
 134 #define GL_TEXTURE3_ARB                                         0x84C3
 135 #define GL_TEXTURE4_ARB                                         0x84C4
 136 #define GL_TEXTURE5_ARB                                         0x84C5
 137 #define GL_TEXTURE6_ARB                                         0x84C6
 138 #define GL_TEXTURE7_ARB                                         0x84C7
 139 #define GL_TEXTURE8_ARB                                         0x84C8
 140 #define GL_TEXTURE9_ARB                                         0x84C9
 141 #define GL_TEXTURE10_ARB                                        0x84CA
 142 #define GL_TEXTURE11_ARB                                        0x84CB
 143 #define GL_TEXTURE12_ARB                                        0x84CC
 144 #define GL_TEXTURE13_ARB                                        0x84CD
 145 #define GL_TEXTURE14_ARB                                        0x84CE
 146 #define GL_TEXTURE15_ARB                                        0x84CF
 147 #define GL_TEXTURE16_ARB                                        0x84D0
 148 #define GL_TEXTURE17_ARB                                        0x84D1
 149 #define GL_TEXTURE18_ARB                                        0x84D2
 150 #define GL_TEXTURE19_ARB                                        0x84D3
 151 #define GL_TEXTURE20_ARB                                        0x84D4
 152 #define GL_TEXTURE21_ARB                                        0x84D5
 153 #define GL_TEXTURE22_ARB                                        0x84D6
 154 #define GL_TEXTURE23_ARB                                        0x84D7
 155 #define GL_TEXTURE24_ARB                                        0x84D8
 156 #define GL_TEXTURE25_ARB                                        0x84D9
 157 #define GL_TEXTURE26_ARB                                        0x84DA
 158 #define GL_TEXTURE27_ARB                                        0x84DB
 159 #define GL_TEXTURE28_ARB                                        0x84DC
 160 #define GL_TEXTURE29_ARB                                        0x84DD
 161 #define GL_TEXTURE30_ARB                                        0x84DE
 162 #define GL_TEXTURE31_ARB                                        0x84DF
 163 #define GL_ACTIVE_TEXTURE_ARB                                   0x84E0
 164 #define GL_CLIENT_ACTIVE_TEXTURE_ARB                            0x84E1
 165 #define GL_MAX_TEXTURE_UNITS_ARB                                0x84E2
 166 #endif
 167
 168 typedef void (APIENTRY * glActiveTextureProc)(GLenum texture);
 169 typedef void (APIENTRY * glClientActiveTextureProc)(GLenum texture);
 170
 171 /*
 172  * GL_EXT_separate_specular_color
 173  */
 174
 175 #ifndef GL_LIGHT_MODEL_COLOR_CONTROL
 176 #define GL_LIGHT_MODEL_COLOR_CONTROL                            0x81F8
 177 #define GL_SINGLE_COLOR                                         0x81F9
 178 #define GL_SEPARATE_SPECULAR_COLOR                              0x81FA
 179 #endif
 180
 181 /*
 182  * GL_ARB_texture_cube_map
 183  */
 184
 185 #ifndef GL_ARB_texture_cube_map
 186 #define GL_ARB_texture_cube_map 1
 187 #define GL_NORMAL_MAP_ARB                                       0x8511
 188 #define GL_REFLECTION_MAP_ARB                                   0x8512
 189 #define GL_TEXTURE_CUBE_MAP_ARB                                 0x8513
 190 #define GL_TEXTURE_BINDING_CUBE_MAP_ARB                         0x8514
 191 #define GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB                      0x8515
 192 #define GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB                      0x8516
 193 #define GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB                      0x8517
 194 #define GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB                      0x8518
 195 #define GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB                      0x8519
 196 #define GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB                      0x851A
 197 #define GL_PROXY_TEXTURE_CUBE_MAP_ARB                           0x851B
 198 #define GL_MAX_CUBE_MAP_TEXTURE_SIZE_ARB                        0x851C
 199 #endif
 200
 201 /*
 202  * GL_ARB_texture_env_combine
 203  */
 204
 205 #ifndef GL_ARB_texture_env_combine
 206 #define GL_ARB_texture_env_combine 1
 207 #define GL_COMBINE_ARB                                          0x8570
 208 #define GL_COMBINE_RGB_ARB                                      0x8571
 209 #define GL_COMBINE_ALPHA_ARB                                    0x8572
 210 #define GL_RGB_SCALE_ARB                                        0x8573
 211 #define GL_ADD_SIGNED_ARB                                       0x8574
 212 #define GL_INTERPOLATE_ARB                                      0x8575
 213 #define GL_CONSTANT_ARB                                         0x8576
 214 #define GL_PRIMARY_COLOR_ARB                                    0x8577
 215 #define GL_PREVIOUS_ARB                                         0x8578
 216 #define GL_SOURCE0_RGB_ARB                                      0x8580
 217 #define GL_SOURCE1_RGB_ARB                                      0x8581
 218 #define GL_SOURCE2_RGB_ARB                                      0x8582
 219 #define GL_SOURCE0_ALPHA_ARB                                    0x8588
 220 #define GL_SOURCE1_ALPHA_ARB                                    0x8589
 221 #define GL_SOURCE2_ALPHA_ARB                                    0x858A
 222 #define GL_OPERAND0_RGB_ARB                                     0x8590
 223 #define GL_OPERAND1_RGB_ARB                                     0x8591
 224 #define GL_OPERAND2_RGB_ARB                                     0x8592
 225 #define GL_OPERAND0_ALPHA_ARB                                   0x8598
 226 #define GL_OPERAND1_ALPHA_ARB                                   0x8599
 227 #define GL_OPERAND2_ALPHA_ARB                                   0x859A
 228 #endif
 229
 230 /*
 231  * GL_ARB_texture_env_dot3
 232  */
 233
 234 #ifndef GL_ARB_texture_env_dot3
 235 #define GL_ARB_texture_env_dot3 1
 236 #define GL_DOT3_RGB_ARB                                         0x86AE
 237 #define GL_DOT3_RGBA_ARB                                        0x86AF
 238 #endif
 239
 240 #if defined(__cplusplus)
 241 }
 242 #endif
 243
 244 #endif // !__SG_EXTENSIONS_HXX
 245