1 files changed, 106 insertions, 0 deletions
diff --git a/indra/newview/lltextureatlasmanager.h b/indra/newview/lltextureatlasmanager.h
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+++ b/indra/newview/lltextureatlasmanager.h
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+/** 
+ * @file lltextureatlasmanager.h
+ * @brief LLTextureAtlasManager 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_TEXTUREATLASMANAGER_H
+#define LL_TEXTUREATLASMANAGER_H
+
+#include "llmemory.h"
+
+class LLSpatialGroup ;
+class LLViewerTexture ;
+
+//just use it as a structure.
+class LLTextureAtlasSlot : public LLRefCount
+{
+public:
+	LLTextureAtlasSlot(LLTextureAtlas* atlasp, LLSpatialGroup* groupp, S16 col, S16 row, F32 xoffset, F32 yoffset, S8 slot_width) ;
+
+protected:
+	virtual ~LLTextureAtlasSlot();
+	
+public:
+
+	//
+	//do not allow to change those values
+	//
+	//void setAtlas(LLTextureAtlas* atlasp) ;	
+	//void setSlotPos(S16 col, S16 row) ;
+	//void setSlotWidth(S8 width) ;
+	//void setTexCoordOffset(F32 xoffser, F32 yoffset) ;
+	//
+
+	void setSpatialGroup(LLSpatialGroup* groupp) ;
+	void setTexCoordScale(F32 xscale, F32 yscale) ;
+	void setValid() {mValid = TRUE ;}
+
+	LLTextureAtlas* getAtlas()const {return mAtlasp;}
+	LLSpatialGroup* getSpatialGroup() const {return mGroupp ;} 
+	S16             getSlotCol()const {return mCol;}
+	S16             getSlotRow()const {return mRow;}
+	S8              getSlotWidth()const{return mReservedSlotWidth;}
+	BOOL            isValid()const { return mValid;}
+	const LLVector2*      getTexCoordOffset()const {return &mTexCoordOffset;}
+	const LLVector2*      getTexCoordScale() const {return &mTexCoordScale;}
+
+	void setUpdatedTime(U32 t) {mUpdatedTime = t;}
+	U32  getUpdatedTime()const {return mUpdatedTime;}
+
+private:
+	LLTextureAtlas* mAtlasp;
+	S16             mCol ;//col of the slot
+	S16             mRow ;//row of the slot
+	S8              mReservedSlotWidth ; //slot is a square with each edge length a power-of-two number	
+	LLSpatialGroup* mGroupp ;
+	BOOL            mValid ;
+
+	LLVector2       mTexCoordOffset ;
+	LLVector2       mTexCoordScale ;
+
+	U32             mUpdatedTime ;	
+} ;
+
+class LLTextureAtlasManager : public LLSingleton<LLTextureAtlasManager>
+{
+private:
+	typedef std::list<LLPointer<LLTextureAtlas> > ll_texture_atlas_list_t ;
+
+public:
+	LLTextureAtlasManager();
+	~LLTextureAtlasManager();
+
+	LLPointer<LLTextureAtlasSlot> reserveAtlasSlot(S32 sub_texture_size, S8 ncomponents, 
+		LLSpatialGroup* groupp, LLViewerTexture* imagep) ;
+	void releaseAtlas(LLTextureAtlas* atlasp);
+
+	BOOL canAddToAtlas(S32 w, S32 h, S8 ncomponents, LLGLenum target) ;
+
+private:	
+	std::vector<ll_texture_atlas_list_t> mAtlasMap ;
+	std::vector<ll_texture_atlas_list_t> mEmptyAtlasMap ; //delay some empty atlases deletion to avoid possible creation of new atlas immediately.
+};
+
+#endif