lltextureatlas.h
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- /**
- * @file lltextureatlas.h
- * @brief LLTextureAtlas base class.
- *
- * $LicenseInfo:firstyear=2002&license=viewergpl$
- *
- * Copyright (c) 2002-2010, Linden Research, Inc.
- *
- * Second Life Viewer Source Code
- * The source code in this file ("Source Code") is provided by Linden Lab
- * to you under the terms of the GNU General Public License, version 2.0
- * ("GPL"), unless you have obtained a separate licensing agreement
- * ("Other License"), formally executed by you and Linden Lab. Terms of
- * the GPL can be found in doc/GPL-license.txt in this distribution, or
- * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
- *
- * There are special exceptions to the terms and conditions of the GPL as
- * it is applied to this Source Code. View the full text of the exception
- * in the file doc/FLOSS-exception.txt in this software distribution, or
- * online at
- * http://secondlifegrid.net/programs/open_source/licensing/flossexception
- *
- * By copying, modifying or distributing this software, you acknowledge
- * that you have read and understood your obligations described above,
- * and agree to abide by those obligations.
- *
- * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
- * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
- * COMPLETENESS OR PERFORMANCE.
- * $/LicenseInfo$
- */
- #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