/** * @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 "lldir.h" #include "llvieweroctree.h" #include "llapr.h" //--------------------------------------------------------------------------- // Cache entries class LLCamera; class LLVOCacheEntry : public LLViewerOctreeEntryData { LL_ALIGN_NEW public: enum { //low 16-bit state 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. //high 16-bit state IN_VO_TREE = 0x00010000, //the entry is in the object cache tree. LOW_BITS = 0x0000ffff, HIGH_BITS = 0xffff0000 }; struct CompareVOCacheEntry { bool operator()(const LLVOCacheEntry* const& lhs, const LLVOCacheEntry* const& rhs) const { 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 updateEntry(U32 crc, LLDataPackerBinaryBuffer &dp); void clearState(U32 state) {mState &= ~state;} bool hasState(U32 state) {return mState & state;} void setState(U32 state); bool isState(U32 state) {return (mState & LOW_BITS) == state;} U32 getState() const {return mState & LOW_BITS;} bool isAnyVisible(const LLVector4a& camera_origin, const LLVector4a& local_camera_origin, F32 dist_threshold); U32 getLocalID() const { return mLocalID; } U32 getCRC() const { return mCRC; } S32 getHitCount() const { return mHitCount; } S32 getCRCChangeCount() const { return mCRCChangeCount; } void calcSceneContribution(const LLVector4a& camera_origin, bool needs_update, U32 last_update, F32 dist_threshold); void setSceneContribution(F32 scene_contrib) {mSceneContrib = scene_contrib;} F32 getSceneContribution() const { return mSceneContrib;} void dump() const; S32 writeToBuffer(U8 *data_buffer) const; LLDataPackerBinaryBuffer *getDP(); void recordHit(); void recordDupe() { mDupeCount++; } /*virtual*/ void setOctreeEntry(LLViewerOctreeEntry* entry); void setParentID(U32 id); U32 getParentID() const {return mParentID;} bool isChild() const {return mParentID > 0;} void addChild(LLVOCacheEntry* entry); void removeChild(LLVOCacheEntry* entry); void removeAllChildren(); LLVOCacheEntry* getChild(); //remove the first child, and return it. S32 getNumOfChildren() const {return mChildrenList.size();} void setBoundingInfo(const LLVector3& pos, const LLVector3& scale); //called from processing object update message void updateParentBoundingInfo(); void saveBoundingSphere(); void setValid(BOOL valid = TRUE) {mValid = valid;} BOOL isValid() const {return mValid;} void setUpdateFlags(U32 flags) {mUpdateFlags = flags;} U32 getUpdateFlags() const {return mUpdateFlags;} static void updateDebugSettings(); static F32 getSquaredPixelThreshold(bool is_front); private: void updateParentBoundingInfo(const LLVOCacheEntry* child); 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; S32 mLastCameraUpdated; protected: U32 mLocalID; U32 mParentID; U32 mCRC; U32 mUpdateFlags; //receive from sim S32 mHitCount; S32 mDupeCount; S32 mCRCChangeCount; LLDataPackerBinaryBuffer mDP; U8 *mBuffer; F32 mSceneContrib; //projected scene contributuion of this object. U32 mState; //high 16 bits reserved for special use. vocache_entry_set_t mChildrenList; //children entries in a linked set. BOOL mValid; //if set, this entry is valid, otherwise it is invalid and will be removed. LLVector4a mBSphereCenter; //bounding sphere center F32 mBSphereRadius; //bounding sphere radius public: static U32 sMinFrameRange; static F32 sNearRadius; static F32 sRearFarRadius; static F32 sFrontPixelThreshold; static F32 sRearPixelThreshold; }; class LLVOCacheGroup : public LLOcclusionCullingGroup { public: LLVOCacheGroup(OctreeNode* node, LLViewerOctreePartition* part) : LLOcclusionCullingGroup(node, part){} //virtual void handleChildAddition(const OctreeNode* parent, OctreeNode* child); protected: virtual ~LLVOCacheGroup(); }; class LLVOCachePartition : public LLViewerOctreePartition { public: LLVOCachePartition(LLViewerRegion* regionp); bool addEntry(LLViewerOctreeEntry* entry); void removeEntry(LLViewerOctreeEntry* entry); /*virtual*/ S32 cull(LLCamera &camera, bool do_occlusion); void addOccluders(LLViewerOctreeGroup* gp); void resetOccluders(); void processOccluders(LLCamera* camera); void removeOccluder(LLVOCacheGroup* group); void setCullHistory(BOOL has_new_object); bool isFrontCull() const {return mFrontCull;} private: void selectBackObjects(LLCamera &camera, F32 projection_area_cutoff, bool use_occlusion); //select objects behind camera. public: static BOOL sNeedsOcclusionCheck; private: BOOL mFrontCull; //the view frustum cull if set, otherwise is back sphere cull. U32 mCullHistory; U32 mCulledTime[LLViewerCamera::NUM_CAMERAS]; std::set<LLVOCacheGroup*> mOccludedGroups; S32 mBackSlectionEnabled; //enable to select back objects if > 0. U32 mIdleHash; }; // //Note: LLVOCache is not thread-safe // class LLVOCache : public LLParamSingleton<LLVOCache> { LLSINGLETON(LLVOCache, bool read_only); ~LLVOCache() ; private: struct HeaderEntryInfo { HeaderEntryInfo() : mIndex(0), mHandle(0), mTime(0) {} S32 mIndex; U64 mHandle ; U32 mTime ; }; struct HeaderMetaInfo { HeaderMetaInfo() : mVersion(0), mAddressSize(0) {} U32 mVersion; U32 mAddressSize; }; 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; public: // We need this init to be separate from constructor, since we might construct cache, purge it, then init. void initCache(ELLPath location, U32 size, U32 cache_version); void removeCache(ELLPath location, bool started = false) ; 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, bool removal_enabled); void removeEntry(U64 handle) ; U32 getCacheEntries() { return mNumEntries; } U32 getCacheEntriesMax() { return mCacheSize; } 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; }; #endif