| 32 | |
| 33 | |
| 34 | class CTextureCache : public CSingleton< CTextureCache > |
| 35 | { |
| 36 | public: |
| 37 | CTextureCache(); |
| 38 | virtual ~CTextureCache(); |
| 39 | |
| 40 | CRefPtr<CNativeTexture> GetOrCreateTexture(const TextureInfo & ti); |
| 41 | |
| 42 | void PurgeOldTextures(); |
| 43 | void DropTextures(); |
| 44 | |
| 45 | |
| 46 | #ifdef DAEDALUS_DEBUG_DISPLAYLIST |
| 47 | Mutex * GetDebugMutex() { return &mDebugMutex; } |
| 48 | struct STextureInfoSnapshot |
| 49 | { |
| 50 | STextureInfoSnapshot( const TextureInfo & info, CNativeTexture * texture ) |
| 51 | : Info( info ), Texture( texture ) |
| 52 | { |
| 53 | } |
| 54 | |
| 55 | TextureInfo Info; |
| 56 | CRefPtr<CNativeTexture> Texture; |
| 57 | }; |
| 58 | |
| 59 | // You must have a valid lock to call Snapshot. |
| 60 | void Snapshot(const MutexLock & lock, std::vector< STextureInfoSnapshot > & snapshot) const; |
| 61 | #else |
| 62 | // Don't bother locking if we're not debugging. |
| 63 | Mutex * GetDebugMutex() { return nullptr; } |
| 64 | #endif |
| 65 | |
| 66 | private: |
| 67 | CachedTexture * GetOrCreateCachedTexture(const TextureInfo & ti); |
| 68 | |
| 69 | // |
| 70 | // We implement a 2-way skewed associative cache. |
| 71 | // Each TextureInfo is hashed using two different methods, to reduce the chance of collisions |
| 72 | // |
| 73 | static const u32 HASH_TABLE_BITS {9}; |
| 74 | static const u32 HASH_TABLE_SIZE {1<<HASH_TABLE_BITS}; |
| 75 | |
| 76 | inline static u32 MakeHashIdxA( const TextureInfo & ti ); |
| 77 | inline static u32 MakeHashIdxB( const TextureInfo & ti ); |
| 78 | |
| 79 | // FIXME(strmnnrmn): we should have a struct of TextureInfo+CachedTexture instead - |
| 80 | // doing binary search on this array needs a memory indirect for every probe. |
| 81 | typedef std::vector< CachedTexture * > TextureVec; |
| 82 | TextureVec mTextures; |
| 83 | CachedTexture * mpCacheHashTable[HASH_TABLE_SIZE]; |
| 84 | #ifdef DAEDALUS_DEBUG_DISPLAYLIST |
| 85 | Mutex mDebugMutex; |
| 86 | #endif |
| 87 | }; |
| 88 | |
| 89 | #endif // HLEGRAPHICS_TEXTURECACHE_H_ |