Open Inventor Reference
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00001 /* 00002 * 00003 * Copyright (C) 2000 Silicon Graphics, Inc. All Rights Reserved. 00004 * 00005 * This library is free software; you can redistribute it and/or 00006 * modify it under the terms of the GNU Lesser General Public 00007 * License as published by the Free Software Foundation; either 00008 * version 2.1 of the License, or (at your option) any later version. 00009 * 00010 * This library is distributed in the hope that it will be useful, 00011 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00012 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00013 * Lesser General Public License for more details. 00014 * 00015 * Further, this software is distributed without any warranty that it is 00016 * free of the rightful claim of any third person regarding infringement 00017 * or the like. Any license provided herein, whether implied or 00018 * otherwise, applies only to this software file. Patent licenses, if 00019 * any, provided herein do not apply to combinations of this program with 00020 * other software, or any other product whatsoever. 00021 * 00022 * You should have received a copy of the GNU Lesser General Public 00023 * License along with this library; if not, write to the Free Software 00024 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 00025 * 00026 * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy, 00027 * Mountain View, CA 94043, or: 00028 * 00029 * http://www.sgi.com 00030 * 00031 * For further information regarding this notice, see: 00032 * 00033 * http://oss.sgi.com/projects/GenInfo/NoticeExplan/ 00034 * 00035 */ 00036 00037 00038 /* 00039 * Copyright (C) 1990,91 Silicon Graphics, Inc. 00040 * 00041 _______________________________________________________________________ 00042 ______________ S I L I C O N G R A P H I C S I N C . ____________ 00043 | 00044 | $Revision: 1.1.1.1 $ 00045 | 00046 | Description: 00047 | This file defines the abstract SoCache class, the base class 00048 | for all caches in Inventor. 00049 | 00050 | Author(s) : Paul S. Strauss 00051 | 00052 ______________ S I L I C O N G R A P H I C S I N C . ____________ 00053 _______________________________________________________________________ 00054 */ 00055 00056 #ifndef _SO_CACHE 00057 #define _SO_CACHE 00058 00077 00078 #include <Inventor/SoLists.h> 00079 00080 class SoElement; 00081 class SoState; 00082 00083 SoEXTENDER class INVENTOR_API SoCache { 00084 00085 public: 00086 00090 SoCache(SoState *state); 00091 00093 void ref(); 00094 void unref(SoState *state = NULL); 00095 00097 void addElement(const SoElement *elt); 00098 00102 virtual void addCacheDependency(const SoState *state, 00103 SoCache *cache); 00104 00106 virtual SbBool isValid(const SoState *state) const; 00107 00112 const SoElement * getInvalidElement(const SoState *state) const; 00113 00115 void invalidate(); 00116 00117 protected: 00122 virtual void destroy(SoState *state); 00123 00125 virtual ~SoCache(); 00126 00127 private: 00128 SbPList elementsUsed; 00129 unsigned char *elementsUsedFlags; 00130 00131 int refCount; 00132 int invalidated; 00133 int depth; 00134 }; 00135 00136 #endif /* _SO_CACHE */