Panda3D
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00001 // Filename: bufferContext.h 00002 // Created by: drose (16Mar06) 00003 // 00004 //////////////////////////////////////////////////////////////////// 00005 // 00006 // PANDA 3D SOFTWARE 00007 // Copyright (c) Carnegie Mellon University. All rights reserved. 00008 // 00009 // All use of this software is subject to the terms of the revised BSD 00010 // license. You should have received a copy of this license along 00011 // with this source code in a file named "LICENSE." 00012 // 00013 //////////////////////////////////////////////////////////////////// 00014 00015 #ifndef BUFFERCONTEXT_H 00016 #define BUFFERCONTEXT_H 00017 00018 #include "pandabase.h" 00019 00020 #include "savedContext.h" 00021 #include "updateSeq.h" 00022 #include "linkedListNode.h" 00023 #include "bufferContextChain.h" 00024 #include "bufferResidencyTracker.h" 00025 00026 class PreparedGraphicsObjects; 00027 00028 //////////////////////////////////////////////////////////////////// 00029 // Class : BufferContext 00030 // Description : This is a base class for those kinds of SavedContexts 00031 // that occupy an easily-measured (and substantial) 00032 // number of bytes in the video card's frame buffer 00033 // memory or AGP memory. At the present, this includes 00034 // most of the SavedContext types: VertexBufferContext 00035 // and IndexBufferContext, as well as TextureContext. 00036 // 00037 // This class provides methods for tracking the video 00038 // memory utilization, as well as residency of each 00039 // object, via PStats. 00040 //////////////////////////////////////////////////////////////////// 00041 class EXPCL_PANDA_GOBJ BufferContext : public SavedContext, private LinkedListNode { 00042 public: 00043 BufferContext(BufferResidencyTracker *residency); 00044 virtual ~BufferContext(); 00045 00046 PUBLISHED: 00047 INLINE size_t get_data_size_bytes() const; 00048 INLINE UpdateSeq get_modified() const; 00049 INLINE bool get_active() const; 00050 INLINE bool get_resident() const; 00051 00052 public: 00053 INLINE void set_active(bool flag); 00054 INLINE void set_resident(bool flag); 00055 00056 INLINE BufferContext *get_next() const; 00057 00058 INLINE void update_data_size_bytes(size_t new_data_size_bytes); 00059 INLINE void update_modified(UpdateSeq new_modified); 00060 00061 private: 00062 void set_owning_chain(BufferContextChain *chain); 00063 00064 private: 00065 BufferResidencyTracker *_residency; 00066 int _residency_state; 00067 00068 size_t _data_size_bytes; 00069 UpdateSeq _modified; 00070 BufferContextChain *_owning_chain; 00071 00072 public: 00073 static TypeHandle get_class_type() { 00074 return _type_handle; 00075 } 00076 static void init_type() { 00077 SavedContext::init_type(); 00078 register_type(_type_handle, "BufferContext", 00079 SavedContext::get_class_type()); 00080 } 00081 virtual TypeHandle get_type() const { 00082 return get_class_type(); 00083 } 00084 virtual TypeHandle force_init_type() {init_type(); return get_class_type();} 00085 00086 private: 00087 static TypeHandle _type_handle; 00088 00089 friend class PreparedGraphicsObjects; 00090 friend class BufferResidencyTracker; 00091 friend class BufferContextChain; 00092 }; 00093 00094 #include "bufferContext.I" 00095 00096 #endif 00097