OgreHardwareOcclusionQuery.h

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00001 /*
00002 -----------------------------------------------------------------------------
00003 This source file is part of OGRE
00004     (Object-oriented Graphics Rendering Engine)
00005 For the latest info, see http://www.ogre3d.org
00006 
00007 Copyright (c) 2000-2006 Torus Knot Software Ltd
00008 Also see acknowledgements in Readme.html
00009 
00010 This program is free software; you can redistribute it and/or modify it under
00011 the terms of the GNU Lesser General Public License as published by the Free Software
00012 Foundation; either version 2 of the License, or (at your option) any later
00013 version.
00014 
00015 This program is distributed in the hope that it will be useful, but WITHOUT
00016 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
00017 FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
00018 
00019 You should have received a copy of the GNU Lesser General Public License along with
00020 this program; if not, write to the Free Software Foundation, Inc., 59 Temple
00021 Place - Suite 330, Boston, MA 02111-1307, USA, or go to
00022 http://www.gnu.org/copyleft/lesser.txt.
00023 
00024 You may alternatively use this source under the terms of a specific version of
00025 the OGRE Unrestricted License provided you have obtained such a license from
00026 Torus Knot Software Ltd.
00027 -----------------------------------------------------------------------------
00028 */
00029 #ifndef _HardwareOcclusionQuery__
00030 #define _HardwareOcclusionQuery__
00031 
00032 // Precompiler options
00033 #include "OgrePrerequisites.h"
00034 
00035 namespace Ogre {
00036 
00037 
00038 
00046     class _OgreExport HardwareOcclusionQuery : public RenderSysAlloc
00047 {
00048 //----------------------------------------------------------------------
00049 // Public methods
00050 //--
00051 public:
00060     HardwareOcclusionQuery();
00061 
00065     virtual ~HardwareOcclusionQuery();
00066 
00083     virtual void beginOcclusionQuery() = 0;
00084 
00088     virtual void endOcclusionQuery() = 0;
00089 
00097     virtual bool pullOcclusionQuery(unsigned int* NumOfFragments) = 0;
00098 
00104     unsigned int getLastQuerysPixelcount() const { return mPixelCount; }
00105 
00110      virtual bool isStillOutstanding(void) = 0; 
00111 
00112 
00113     //----------------------------------------------------------------------
00114     // protected members
00115     //--
00116     protected :
00117         // numbers of visible pixels determined by last query
00118         unsigned int mPixelCount;
00119         // is query hasn't yet returned a result.
00120         bool         mIsQueryResultStillOutstanding;
00121 };
00122 
00123 }
00124 #endif
00125 

Copyright © 2008 Torus Knot Software Ltd
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Last modified Sun Sep 27 22:02:23 2009