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/**
* @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
{
CHILD = 0x00010000, //has parent
BRIDGE_CHILD = 0x00020000 //is a child of a spatial bridge.
};
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);
bool isState(U32 state) {return (mState & 0xffff) == state;}
U32 getState() const {return (mState & 0xffff);}
U32 getFullState() const {return mState;}
void setBridgeChild();
void clearBridgeChild();
bool isBridgeChild() {return mState & BRIDGE_CHILD;}
U32 getLocalID() const { return mLocalID; }
U32 getCRC() const { return mCRC; }
S32 getHitCount() const { return mHitCount; }
S32 getCRCChangeCount() const { return mCRCChangeCount; }
S32 getMinVisFrameRange()const;
U32 getParentID();
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();}
bool isDummy() {return !mBuffer;}
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
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