# 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://ogre.sourceforge.net/
    00006
    00007 Copyright (c) 2000-2005 The OGRE Team
    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 */
    00025 #ifndef _HardwareOcclusionQuery__
    00026 #define _HardwareOcclusionQuery__
    00027
    00028 // Precompiler options
    00029 #include "OgrePrerequisites.h"
    00030
    00031 namespace Ogre {
    00032
    00033
    00034
    00042 class _OgreExport HardwareOcclusionQuery
    00043 {
    00044 //----------------------------------------------------------------------
    00045 // Public methods
    00046 //--
    00047 public:
    00056     HardwareOcclusionQuery();
    00057
    00061     virtual ~HardwareOcclusionQuery();
    00062
    00079     virtual void beginOcclusionQuery() = 0;
    00080
    00084     virtual void endOcclusionQuery() = 0;
    00085
    00093     virtual bool pullOcclusionQuery(unsigned int* NumOfFragments) = 0;
    00094
    00100     unsigned int getLastQuerysPixelcount() const { return mPixelCount; }
    00101
    00106      virtual bool isStillOutstanding(void) = 0;
    00107
    00108
    00109     //----------------------------------------------------------------------
    00110     // protected members
    00111     //--
    00112     protected :
    00113         // numbers of visible pixels determined by last query
    00114         unsigned int mPixelCount;
    00115         // is query hasn't yet returned a result.
    00116         bool         mIsQueryResultStillOutstanding;
    00117 };
    00118
    00119 }
    00120 #endif
    00121

Copyright © 2000-2005 by The OGRE Team
This work is licensed under a Creative Commons Attribution-ShareAlike 2.5 License.
Last modified Sun Sep 17 15:39:09 2006