Panda3D

posixGraphicsStateGuardian.h

00001 // Filename: posixGraphicsStateGuardian.h
00002 // Created by:  drose (14Jan12)
00003 //
00004 ////////////////////////////////////////////////////////////////////
00005 //
00006 // PANDA 3D SOFTWARE
00007 // Copyright (c) Carnegie Mellon University.  All rights reserved.
00008 //
00009 // All use of this software is subject to the terms of the revised BSD
00010 // license.  You should have received a copy of this license along
00011 // with this source code in a file named "LICENSE."
00012 //
00013 ////////////////////////////////////////////////////////////////////
00014 
00015 #ifndef POSIXGRAPHICSSTATEGUARDIAN_H
00016 #define POSIXGRAPHICSSTATEGUARDIAN_H
00017 
00018 #include "pandabase.h"
00019 
00020 #include "glgsg.h"
00021 
00022 ////////////////////////////////////////////////////////////////////
00023 //       Class : PosixGraphicsStateGuardian
00024 // Description : This GSG is used only for CallbackGraphicsWindow
00025 //               (which might not be using the glx interfaces), to add
00026 //               the ability to peek in libGL.so to find the extension
00027 //               functions.
00028 ////////////////////////////////////////////////////////////////////
00029 class PosixGraphicsStateGuardian : public GLGraphicsStateGuardian {
00030 public:
00031   PosixGraphicsStateGuardian(GraphicsEngine *engine, GraphicsPipe *pipe);
00032   ~PosixGraphicsStateGuardian();
00033 
00034 protected:
00035   virtual void *do_get_extension_func(const char *prefix, const char *name);
00036   void *get_system_func(const char *name);
00037 
00038 private:
00039   void *_libgl_handle;
00040 
00041 public:
00042   static TypeHandle get_class_type() {
00043     return _type_handle;
00044   }
00045   static void init_type() {
00046     GLGraphicsStateGuardian::init_type();
00047     register_type(_type_handle, "PosixGraphicsStateGuardian",
00048                   GLGraphicsStateGuardian::get_class_type());
00049   }
00050   virtual TypeHandle get_type() const {
00051     return get_class_type();
00052   }
00053   virtual TypeHandle force_init_type() {init_type(); return get_class_type();}
00054 
00055 private:
00056   static TypeHandle _type_handle;
00057 };
00058 
00059 #include "posixGraphicsStateGuardian.I"
00060 
00061 #endif
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