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/**
* @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
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