96 lines
3.1 KiB
C++
96 lines
3.1 KiB
C++
/**
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* @file lltextureatlas.h
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* @brief LLTextureAtlas base class.
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*
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* $LicenseInfo:firstyear=2002&license=viewergpl$
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*
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* Copyright (c) 2002-2009, Linden Research, Inc.
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*
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* Second Life Viewer Source Code
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* The source code in this file ("Source Code") is provided by Linden Lab
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* to you under the terms of the GNU General Public License, version 2.0
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* ("GPL"), unless you have obtained a separate licensing agreement
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* ("Other License"), formally executed by you and Linden Lab. Terms of
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* the GPL can be found in doc/GPL-license.txt in this distribution, or
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* online at http://secondlife.com/developers/opensource/gplv2
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*
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* There are special exceptions to the terms and conditions of the GPL as
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* it is applied to this Source Code. View the full text of the exception
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* in the file doc/FLOSS-exception.txt in this software distribution, or
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* online at http://secondlife.com/developers/opensource/flossexception
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*
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* By copying, modifying or distributing this software, you acknowledge
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* that you have read and understood your obligations described above,
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* and agree to abide by those obligations.
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*
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* ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
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* WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
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* COMPLETENESS OR PERFORMANCE.
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* $/LicenseInfo$
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*/
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#ifndef LL_TEXTUREATLAS_H
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#define LL_TEXTUREATLAS_H
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#include "llviewertexture.h"
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class LLSpatialGroup ;
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class LLTextureAtlas : public LLViewerTexture
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{
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protected:
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/*virtual*/ ~LLTextureAtlas() ;
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public:
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LLTextureAtlas(U8 ncomponents, S16 atlas_dim = 16) ;
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/*virtual*/ S8 getType() const;
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LLGLuint insertSubTexture(LLImageGL* source_gl_tex, S32 discard_level, const LLImageRaw* raw_image, S16 slot_col, S16 slot_row) ;
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void releaseSlot(S16 slot_col, S16 slot_row, S8 slot_width);
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BOOL getNextAvailableSlot(S8 bits_len, S16& col, S16& row) ;
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void getTexCoordOffset(S16 col, S16 row, F32& xoffset, F32& yOffset) ;
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void getTexCoordScale(S32 w, S32 h, F32& xscale, F32& yscale) ;
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BOOL isEmpty() const ;
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BOOL isFull(S8 to_be_reserved = 1) const ;
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F32 getFullness() const ;
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void addSpatialGroup(LLSpatialGroup* groupp) ;
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void removeSpatialGroup(LLSpatialGroup* groupp) ;
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LLSpatialGroup* getLastSpatialGroup() ;
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void removeLastSpatialGroup() ;
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BOOL hasSpatialGroup(LLSpatialGroup* groupp) ;
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void clearSpatialGroup() ;
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std::list<LLSpatialGroup*>* getSpatialGroupList() {return &mSpatialGroupList;}
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private:
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void generateEmptyUsageBits() ;
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void releaseUsageBits() ;
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void markUsageBits(S8 bits_len, U8 mask, S16 col, S16 row) ;
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void unmarkUsageBits(S8 bits_len, S16 col, S16 row) ;
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void getPositionFromIndex(S16 index, S16& col, S16& row) ;
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void getIndexFromPosition(S16 col, S16 row, S16& index) ;
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BOOL areUsageBitsMarked(S8 bits_len, U8 mask, S16 col, S16 row) ;
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private:
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S16 mAtlasDim ; //number of slots per edge, i.e, there are "mAtlasDim * mAtlasDim" total slots in the atlas.
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S16 mNumSlotsReserved ;
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S16 mMaxSlotsInAtlas ;
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U8 **mUsageBits ;
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std::list<LLSpatialGroup*> mSpatialGroupList ;
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public:
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//debug use only
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U8 **mTestBits ;
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public:
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static S16 sMaxSubTextureSize ;
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static S16 sSlotSize ;
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};
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#endif
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