/** * @file lltextureatlas.h * @brief LLTextureAtlas base class. * * $LicenseInfo:firstyear=2002&license=viewerlgpl$ * 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_TEXTUREATLAS_H #define LL_TEXTUREATLAS_H #include "llviewertexture.h" class LLSpatialGroup ; class LLTextureAtlas : public LLViewerTexture { protected: /*virtual*/ ~LLTextureAtlas() ; public: LLTextureAtlas(U8 ncomponents, S16 atlas_dim = 16) ; /*virtual*/ S8 getType() const; LLGLuint insertSubTexture(LLImageGL* source_gl_tex, S32 discard_level, const LLImageRaw* raw_image, S16 slot_col, S16 slot_row) ; void releaseSlot(S16 slot_col, S16 slot_row, S8 slot_width); BOOL getNextAvailableSlot(S8 bits_len, S16& col, S16& row) ; void getTexCoordOffset(S16 col, S16 row, F32& xoffset, F32& yOffset) ; void getTexCoordScale(S32 w, S32 h, F32& xscale, F32& yscale) ; BOOL isEmpty() const ; BOOL isFull(S8 to_be_reserved = 1) const ; F32 getFullness() const ; void addSpatialGroup(LLSpatialGroup* groupp) ; void removeSpatialGroup(LLSpatialGroup* groupp) ; LLSpatialGroup* getLastSpatialGroup() ; void removeLastSpatialGroup() ; BOOL hasSpatialGroup(LLSpatialGroup* groupp) ; void clearSpatialGroup() ; std::list<LLSpatialGroup*>* getSpatialGroupList() {return &mSpatialGroupList;} private: void generateEmptyUsageBits() ; void releaseUsageBits() ; void markUsageBits(S8 bits_len, U8 mask, S16 col, S16 row) ; void unmarkUsageBits(S8 bits_len, S16 col, S16 row) ; void getPositionFromIndex(S16 index, S16& col, S16& row) ; void getIndexFromPosition(S16 col, S16 row, S16& index) ; BOOL areUsageBitsMarked(S8 bits_len, U8 mask, S16 col, S16 row) ; private: S16 mAtlasDim ; //number of slots per edge, i.e, there are "mAtlasDim * mAtlasDim" total slots in the atlas. S16 mNumSlotsReserved ; S16 mMaxSlotsInAtlas ; U8 **mUsageBits ; std::list<LLSpatialGroup*> mSpatialGroupList ; public: //debug use only U8 **mTestBits ; public: static S16 sMaxSubTextureSize ; static S16 sSlotSize ; }; #endif