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
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Last modified Sun Sep 27 22:02:23 2009