//----------------------------------------------------------------------------
//  EgalTech 2015-2015
//----------------------------------------------------------------------------
// File : Scene.h           Data : 27.09.15           Versione : 1.6i8
// Contenuto : Dichiarazione della classe gestione textures.
//
//
//
// Modifiche : 27.09.15 DS Creazione modulo.
//
//
//----------------------------------------------------------------------------

#pragma once

#include <string>
#include <unordered_map>

class Scene ;

//----------------------------------------------------------------------------
struct TextureData {
   std::string  sFile ;
   double       dDimX ;
   double       dDimY ;
   int          nWidth ;
   int          nHeight ;
   int          nImgWidth ;
   int          nImgHeight ;
   unsigned int nTexId ;
   int          nRepeat ;

   TextureData( void)
      : dDimX( 0), dDimY( 0), nWidth( 0), nHeight( 0), nImgWidth( 0), nImgHeight( 0), nTexId( 0), nRepeat( 0) {}
   TextureData( std::string sF, double dX, double dY, int nW, int nH, int nImgW, int nImgH, unsigned int nT, int nR)
      : sFile( sF), dDimX( dX), dDimY( dY), nWidth( nW), nHeight( nH), nImgWidth( nImgW), nImgHeight( nImgH), nTexId( nT), nRepeat( nR) {}
} ;
typedef std::unordered_map<std::string,TextureData> STRTEXTD_UMAP ;

struct FIBITMAP ;

//----------------------------------------------------------------------------
class TextureMgr
{
   public :
      TextureMgr( void) ;
      ~TextureMgr( void) ;

   public :
      void SetScene( Scene* pScene)
              { m_pScene = pScene ; }
      bool Clear( void) ;
      bool SetTextureMaxLinPixels( int nMaxLinPix) ;
      bool LoadTexture( const std::string& sName, const std::string& sPath,
                        double dMMxPix, double dDimX, double dDimY, int nRepeat) ;
      bool Exists( const std::string& sName) const ;
      bool GetPixels( const std::string& sName, int& nWidth, int& nHeight) const ;
      bool GetImagePixels( const std::string& sName, int& nWidth, int& nHeight) const ;
      bool GetDimensions( const std::string& sName, double& dDimX, double& dDimY) const ;
      bool ChangeDimensions( const std::string& sName, double dDimX, double dDimY) ;
      bool UnloadTexture( const std::string& sName) ;
      bool GetTextureData( const std::string& sName, unsigned int& nId, double& dDimX, double& dDimY) const ;

   private :
      bool LoadCalcTexture( const std::string& sName,
                            double dMMxPix, double dDimX, double dDimY, int nRepeat) ;
      bool ReadImage( const std::string& sFile, FIBITMAP*& pDib, int& nFilePixX, int& nFilePixY) ;
      bool TestImageWithOpenGL( FIBITMAP*& pDib) ;

   private :
      Scene*  m_pScene ;               // puntatore alla scena
      int     m_nMaxLinPix ;           // massima dimensione lineare in pixel
      STRTEXTD_UMAP m_umTextData ;     // dati delle textures
} ;