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Diffstat (limited to 'indra/newview/lltextureatlas.h')
| -rw-r--r-- | indra/newview/lltextureatlas.h | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/indra/newview/lltextureatlas.h b/indra/newview/lltextureatlas.h new file mode 100644 index 0000000000..1f756ccf1a --- /dev/null +++ b/indra/newview/lltextureatlas.h @@ -0,0 +1,95 @@ +/** + * @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 + |