lugre_texatlas.h

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/*
http://www.opensource.org/licenses/mit-license.php  (MIT-License)

Copyright (c) 2007 Lugre-Team

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/
#ifndef LUGRE_TEXATLAS_H
#define LUGRE_TEXATLAS_H

#include "lugre_smartptr.h"
#include <Ogre.h>
#include <vector>
#include <list>
        
class lua_State;
    
namespace Lugre {

class cTexAtlas : public cSmartPointable { public:
    
    cTexAtlas   (const int iW, const int iH, const int iMaxSubW = -1, const int iMaxSubH = -1);
    
    bool                AddImage    (Ogre::Image& pSrc,Ogre::Rectangle& pOutTexCoords,const int iBorderPixels=4,const bool bWrap=true);
    
    Ogre::TexturePtr    MakeTexture (const Ogre::String &name, const Ogre::String &group=Ogre::ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME);
    
    void                MakeImage   (Ogre::Image& pDest);
    
    // lua binding
    static void     LuaRegister     (lua_State *L);
    
    // internal
    private:
        
    void    MarkAsFreeSpace(const int x,const int y,const int w,const int h);
        
    void    FillRect(const int x, const int y, const int w, const int h, const float r, const float g, const float b, const float a);
    
    // freespace data
    struct cFreeSpaceCell { int x,y,w,h; cFreeSpaceCell() {} cFreeSpaceCell(const int x,const int y,const int w,const int h) : x(x),y(y),w(w),h(h) {} };
    std::list<cFreeSpaceCell> mlFreeSpace;
    
    bool            RequestArea         (const int w,const int h,int& l,int& r,int& t,int& b);
    
    // texatlas data
    inline void*    GetPixelPointer     (const int x,const int y) { return (void*)&mData[y*miW+x]; }
    inline void*    GetBasePointer      () { return (void*)&mData[0]; }
    inline int      GetBufferSize       () { return mData.size()*sizeof(Ogre::uint32); } 
    std::vector<Ogre::uint32> mData;
    Ogre::PixelFormat miFormat;
    const int   miW;
    const int   miH;
    const int   miMaxSubW;
    const int   miMaxSubH;
    
    const int   miMinFreeSpaceSize;
    
    int miCurrentLineH;
    int miBrushX;
    int miBrushY;
};

};

#endif