bool extgl_Open(JNIEnv *env) {
if (lib_gl_handle != NULL)
return true;
/*
* Actually we don't need the RTLD_GLOBAL flag, since the symbols
* we load should be private to us. However, according to the
* documentation at
*
* http://dri.sourceforge.net/doc/DRIuserguide.html
*
* DRI drivers need this flag to work properly
*/
lib_gl_handle = dlopen("libGL.so.1", RTLD_LAZY | RTLD_GLOBAL);
if (lib_gl_handle == NULL) {
throwFormattedException(env, "Error loading libGL.so.1: %s", dlerror());
return false;
}
lwjgl_glXGetProcAddressARB = (glXGetProcAddressARBPROC)dlsym(lib_gl_handle, "glXGetProcAddressARB");
if (lwjgl_glXGetProcAddressARB == NULL) {
extgl_Close();
throwException(env, "Could not get address of glXGetProcAddressARB");
return false;
}
/* Unlike Windows, GLX function addresses are context-independent
* so we only have to initialize the addresses once at load
*/
extgl_InitGLX12();
extgl_InitGLX13();
extgl_InitGLXSGISwapControl();
extgl_InitGLXARBCreateContext();
extgl_InitGLXNVPresentVideo();
extgl_InitGLXNVVideoCapture();
return true;
}
JNIEXPORT void JNICALL Java_org_lwjgl_opengl_GLContext_nUnloadOpenGLLibrary(JNIEnv * env, jclass clazz) {
extgl_Close();
}
