summaryrefslogtreecommitdiff
path: root/indra/newview/llvocache.h
blob: c631e127390d532a1734fa5f0191b2d0374554f9 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
/** 
 * @file llvocache.h
 * @brief Cache of objects on the viewer.
 *
 * $LicenseInfo:firstyear=2003&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2010, Linden Research, Inc.
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation;
 * version 2.1 of the License only.
 * 
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 * 
 * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
 * $/LicenseInfo$
 */

#ifndef LL_LLVOCACHE_H
#define LL_LLVOCACHE_H

#include "lluuid.h"
#include "lldatapacker.h"
#include "lldlinked.h"
#include "lldir.h"
#include "llvieweroctree.h"

//---------------------------------------------------------------------------
// Cache entries
class LLVOCacheEntry;
class LLCamera;

class LLVOCacheEntry : public LLViewerOctreeEntryData
{
public:
	enum
	{
		INACTIVE = 0x00000000,     //not visible
		IN_QUEUE = 0x00000001,     //in visible queue, object to be created
		WAITING  = 0x00000002,     //object creation request sent
		ACTIVE   = 0x00000004      //object created, and in rendering pipeline.
	};

	enum
	{
		ADD_TO_CACHE_TREE = 0x00010000, //has parent
	};

	struct CompareVOCacheEntry
	{
		bool operator()(const LLVOCacheEntry* const& lhs, const LLVOCacheEntry* const& rhs)
		{
			F32 lpa = lhs->getSceneContribution();
			F32 rpa = rhs->getSceneContribution();

			//larger pixel area first
			if(lpa > rpa)		
			{
				return true;
			}
			else if(lpa < rpa)
			{
				return false;
			}
			else
			{
				return lhs < rhs;
			}			
		}
	};
protected:
	~LLVOCacheEntry();
public:
	LLVOCacheEntry(U32 local_id, U32 crc, LLDataPackerBinaryBuffer &dp);
	LLVOCacheEntry(LLAPRFile* apr_file);
	LLVOCacheEntry();	

	void setState(U32 state);
	void clearState(U32 state) {mState &= ~state;}
	void addState(U32 state)   {mState |= state;}
	bool isState(U32 state)    {return (mState & 0xffff) == state;}
	bool hasState(U32 state)   {return mState & state;}
	U32  getState() const      {return (mState & 0xffff);}
	U32  getFullState() const  {return mState;}
	
	U32 getLocalID() const			{ return mLocalID; }
	U32 getCRC() const				{ return mCRC; }
	S32 getHitCount() const			{ return mHitCount; }
	S32 getCRCChangeCount() const	{ return mCRCChangeCount; }
	S32 getMinVisFrameRange()const;	

	void calcSceneContribution(const LLVector3& camera_origin, bool needs_update, U32 last_update);
	void setSceneContribution(F32 scene_contrib) {mSceneContrib = scene_contrib;}
	F32 getSceneContribution() const             { return mSceneContrib;}

	void dump() const;
	BOOL writeToFile(LLAPRFile* apr_file) const;
	LLDataPackerBinaryBuffer *getDP(U32 crc);
	LLDataPackerBinaryBuffer *getDP();
	void recordHit();
	void recordDupe() { mDupeCount++; }
	
	void copyTo(LLVOCacheEntry* new_entry); //copy variables 
	/*virtual*/ void setOctreeEntry(LLViewerOctreeEntry* entry);

	void addChild(LLVOCacheEntry* entry);
	LLVOCacheEntry* getChild(S32 i) {return mChildrenList[i];}
	S32  getNumOfChildren()         {return mChildrenList.size();}
	void clearChildrenList()        {mChildrenList.clear();}

public:
	typedef std::map<U32, LLPointer<LLVOCacheEntry> >	   vocache_entry_map_t;
	typedef std::set<LLVOCacheEntry*>                      vocache_entry_set_t;
	typedef std::set<LLVOCacheEntry*, CompareVOCacheEntry> vocache_entry_priority_list_t;	

protected:
	U32							mLocalID;
	U32							mCRC;
	S32							mHitCount;
	S32							mDupeCount;
	S32							mCRCChangeCount;
	LLDataPackerBinaryBuffer	mDP;
	U8							*mBuffer;

	F32                         mSceneContrib; //projected scene contributuion of this object.
	S32                         mVisFrameRange;
	S32                         mRepeatedVisCounter; //number of repeatedly visible within a short time.
	U32                         mState; //high 16 bits reserved for special use.
	std::vector<LLVOCacheEntry*> mChildrenList; //children entries in a linked set.
};

class LLVOCachePartition : public LLViewerOctreePartition
{
public:
	LLVOCachePartition(LLViewerRegion* regionp);

	void addEntry(LLViewerOctreeEntry* entry);
	void removeEntry(LLViewerOctreeEntry* entry);
	/*virtual*/ S32 cull(LLCamera &camera);

private:
	U32 mVisitedTime;
};

//
//Note: LLVOCache is not thread-safe
//
class LLVOCache
{
private:
	struct HeaderEntryInfo
	{
		HeaderEntryInfo() : mIndex(0), mHandle(0), mTime(0) {}
		S32 mIndex;
		U64 mHandle ;
		U32 mTime ;
	};

	struct HeaderMetaInfo
	{
		HeaderMetaInfo() : mVersion(0){}

		U32 mVersion;
	};

	struct header_entry_less
	{
		bool operator()(const HeaderEntryInfo* lhs, const HeaderEntryInfo* rhs) const
		{
			if(lhs->mTime == rhs->mTime) 
			{
				return lhs < rhs ;
			}
			
			return lhs->mTime < rhs->mTime ; // older entry in front of queue (set)
		}
	};
	typedef std::set<HeaderEntryInfo*, header_entry_less> header_entry_queue_t;
	typedef std::map<U64, HeaderEntryInfo*> handle_entry_map_t;
private:
	LLVOCache() ;

public:
	~LLVOCache() ;

	void initCache(ELLPath location, U32 size, U32 cache_version) ;
	void removeCache(ELLPath location) ;

	void readFromCache(U64 handle, const LLUUID& id, LLVOCacheEntry::vocache_entry_map_t& cache_entry_map) ;
	void writeToCache(U64 handle, const LLUUID& id, const LLVOCacheEntry::vocache_entry_map_t& cache_entry_map, BOOL dirty_cache) ;
	void removeEntry(U64 handle) ;

	void setReadOnly(BOOL read_only) {mReadOnly = read_only;} 

private:
	void setDirNames(ELLPath location);	
	// determine the cache filename for the region from the region handle	
	void getObjectCacheFilename(U64 handle, std::string& filename);
	void removeFromCache(HeaderEntryInfo* entry);
	void readCacheHeader();
	void writeCacheHeader();
	void clearCacheInMemory();
	void removeCache() ;
	void removeEntry(HeaderEntryInfo* entry) ;
	void purgeEntries(U32 size);
	BOOL updateEntry(const HeaderEntryInfo* entry);
	
private:
	BOOL                 mEnabled;
	BOOL                 mInitialized ;
	BOOL                 mReadOnly ;
	HeaderMetaInfo       mMetaInfo;
	U32                  mCacheSize;
	U32                  mNumEntries;
	std::string          mHeaderFileName ;
	std::string          mObjectCacheDirName;
	LLVolatileAPRPool*   mLocalAPRFilePoolp ; 	
	header_entry_queue_t mHeaderEntryQueue;
	handle_entry_map_t   mHandleEntryMap;	

	static LLVOCache* sInstance ;
public:
	static LLVOCache* getInstance() ;
	static BOOL       hasInstance() ;	
	static void       destroyClass() ;
};

#endif