91 lines
2.8 KiB
C++
91 lines
2.8 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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* $LicenseInfo:firstyear=2002&license=viewerlgpl$
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* Second Life Viewer Source Code
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* Copyright (C) 2010, Linden Research, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation;
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* version 2.1 of the License only.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
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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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