# 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
This work is licensed under a Creative Commons Attribution-ShareAlike 2.5 License.
Last modified Sun Dec 27 17:31:05 2009