3 * Copyright (c) 2001 César Blecua Udías All Rights Reserved.
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:
12 * The above copyright notice and this permission notice shall be included
13 * in all copies or substantial portions of the Software.
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
24 #ifndef __SG_EXTENSIONS_HXX
25 #define __SG_EXTENSIONS_HXX 1
27 #if defined(WIN32) && !defined(__CYGWIN__) && !defined(__MINGW32__)
36 #if defined(__cplusplus)
44 static bool SGSearchExtensionsString(char *extString, char *extName);
45 bool SGIsOpenGLExtensionSupported(char *extName);
48 // don't use an inline function for symbol lookup, since it is too big
49 void* macosxGetGLProcAddress(const char *func);
52 inline void (*SGLookupFunction(const char *func))() {
54 #if defined( WIN32 ) && !defined(__CYGWIN__) && !defined(__MINGW32__)
55 return (void (*)()) wglGetProcAddress(func);
57 #elif defined( __APPLE__ )
58 return (void (*)()) macosxGetGLProcAddress(func);
61 // If the target system s UNIX and the ARB_get_proc_address
62 // GLX extension is *not* guaranteed to be supported. An alternative
63 // dlsym-based approach will be used instead.
64 #if defined( linux ) || defined ( sgi ) || defined(__CYGWIN__) || defined(__MINGW32__)
67 libHandle = dlopen("libGL.so", RTLD_LAZY);
68 fptr = (void (*)()) dlsym(libHandle, func);
72 return glXGetProcAddressARB(func);
79 /* OpenGL extension declarations */
80 #ifndef GL_EXT_point_parameters
81 #define GL_POINT_SIZE_MIN_EXT 0x8126
82 #define GL_DISTANCE_ATTENUATION_EXT 0x8129
85 #ifndef GL_ARB_point_parameters
86 #define GL_POINT_SIZE_MIN_ARB 0x8126
87 #define GL_DISTANCE_ATTENUATION_ARB 0x8129
90 typedef void (APIENTRY * glPointParameterfProc)(GLenum pname, GLfloat param);
91 typedef void (APIENTRY * glPointParameterfvProc)(GLenum pname, const GLfloat *params);
93 #if defined(__cplusplus)
97 #endif // !__SG_EXTENSIONS_HXX