#include "extensions.hxx"
#include <simgear/debug/logstream.hxx>
-#if !defined(WIN32) && !defined( GLX_VERSION_1_4 )
+#if !defined(WIN32)
# include <dlfcn.h>
#endif
return GL_FALSE;
}
-bool SGIsOpenGLExtensionSupported(char *extName) {
+bool SGIsOpenGLExtensionSupported(const char *extName) {
// Returns GL_TRUE if the OpenGL Extension whose name is *extName
// is supported by the system, or GL_FALSE otherwise.
//
return function;
}
-#elif !defined( WIN32 ) && !defined(GLX_VERSION_1_4)
+#elif !defined( WIN32 )
void *SGGetGLProcAddress(const char *func) {
static void *libHandle = NULL;
+ static void *(*glXGetProcAddressPtr)(const GLubyte*) = 0;
void *fptr = NULL;
/*
* arise from linking with a different libGL at link time an than later
* use the standard libGL at runtime ...
*/
- if (libHandle == NULL)
+ if (libHandle == NULL) {
libHandle = dlopen(NULL, RTLD_LAZY);
- if (libHandle != NULL) {
+ if (!libHandle) {
+ const char *error = dlerror();
+ if (error) {
+ SG_LOG(SG_GENERAL, SG_INFO, error);
+ return 0;
+ }
+ }
+
+ void* symbol = dlsym(libHandle, "glXGetProcAddress");
+ if (!symbol)
+ symbol = dlsym(libHandle, "glXGetProcAddressARB");
+ glXGetProcAddressPtr = (void *(*)(const GLubyte*)) symbol;
+ }
+
+ // First try the glx api function for that
+ if (glXGetProcAddressPtr) {
+ fptr = glXGetProcAddressPtr((const GLubyte*)func);
+
+ } else if (libHandle != NULL) {
fptr = dlsym(libHandle, func);
-#if defined (__FreeBSD__)
const char *error = dlerror();
-#else
- char *error = dlerror();
-#endif
if (error)
SG_LOG(SG_GENERAL, SG_INFO, error);
}