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Use the dlsym based approach on all unices and depreciate the glXGetProcAddressARB function

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ehofman
2003-06-24 08:22:33 +00:00
parent 23c66b6cfe
commit 8a2e5cace8
1 changed files with 16 additions and 18 deletions
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34
simgear/screen/extensions.hxx
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@@ -49,28 +49,26 @@ bool SGIsOpenGLExtensionSupported(char *extName);
void* macosxGetGLProcAddress(const char *func);
#endif
inline void (*SGLookupFunction(const char *func))() {
inline void (*SGLookupFunction(const char *func))()
{
#if defined( WIN32 ) && !defined(__CYGWIN__) && !defined(__MINGW32__)
return (void (*)()) wglGetProcAddress(func);
return (void (*)()) wglGetProcAddress(func);
#elif defined( __APPLE__ )
return (void (*)()) macosxGetGLProcAddress(func);
#else
return (void (*)()) macosxGetGLProcAddress(func);
// If the target system s UNIX and the ARB_get_proc_address
// GLX extension is *not* guaranteed to be supported. An alternative
// dlsym-based approach will be used instead.
#if defined( linux ) || defined ( sgi ) || defined(__CYGWIN__) || defined(__MINGW32__)
void *libHandle;
void (*fptr)();
libHandle = dlopen("libGL.so", RTLD_LAZY);
fptr = (void (*)()) dlsym(libHandle, func);
dlclose(libHandle);
return fptr;
#else
return glXGetProcAddressARB(func);
#endif
#else // UNIX
// If the target system s UNIX and the ARB_get_proc_address
// GLX extension is *not* guaranteed to be supported. An alternative
// dlsym-based approach will be used instead.
void *libHandle;
void (*fptr)();
libHandle = dlopen("libGL.so", RTLD_LAZY);
fptr = (void (*)()) dlsym(libHandle, func);
dlclose(libHandle);
return fptr;
#endif
}