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/**
* @file lltextureatlas.h
* @brief LLTextureAtlas base class.
*
* $LicenseInfo:firstyear=2002&license=viewergpl$
*
* Copyright (c) 2002-2009, 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://secondlife.com/developers/opensource/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://secondlife.com/developers/opensource/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
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