//----------------------------------------------------------------------------
//  EgalTech 2014-2014
//----------------------------------------------------------------------------
// File : Color.cpp          Data : 12.03.14          Versione : 1.5a5
// Contenuto : Implementazione funzioni per gestione colori.
//
//
//
// Modifiche : 12.03.14 DS Creazione modulo.
//             24.04.14 DS Agg. GetSurfBackColor.
//
//----------------------------------------------------------------------------

//--------------------------- Include ----------------------------------------
#include "stdafx.h"
#include "/EgtDev/Include/EGkColor.h"
#include "/EgtDev/Include/EGnStringUtils.h"

using namespace std ;

//------------------------- Constants ----------------------------------------
struct NamedColor {
   const char* szName ;
   Color       colC ;
} ;
static const NamedColor StdColor[] = {
   { "WHITE", WHITE},
   { "LGRAY", LGRAY},
   { "GRAY", GRAY},
   { "BLACK", BLACK},
   { "RED", RED},
   { "MAROON", MAROON},
   { "YELLOW", YELLOW},
   { "OLIVE", OLIVE},
   { "LIME", LIME},
   { "GREEN", GREEN},
   { "AQUA", AQUA},
   { "TEAL", TEAL},
   { "BLUE", BLUE},
   { "NAVY", NAVY},
   { "FUCHSIA", FUCHSIA},
   { "PURPLE", PURPLE},
   { "ORANGE", ORANGE},
   { "BROWN", BROWN}
} ;
static const int NUM_STDCOLOR = ( sizeof(StdColor) / sizeof(StdColor[0]) ) ;

//----------------------------------------------------------------------------
bool
GetStdColor( const string& sName, Color& cCol)
{
   string sCol = sName ;
   ToUpper( sCol) ;
   for ( int i = 0 ; i < NUM_STDCOLOR ; ++ i) {
      if ( sCol == StdColor[i].szName) {
         cCol = StdColor[i].colC ;
         return true ;
      }
   }

   return false ;
}

//----------------------------------------------------------------------------
bool
GetNameOfStdColor( Color cCol, string& sName)
{
   for ( int i = 0 ; i < NUM_STDCOLOR ; ++ i) {
      if ( cCol == StdColor[i].colC) {
         sName = StdColor[i].szName ;
         return true ;
      }
   }

   return false ;
}

//----------------------------------------------------------------------------
Color
GetOppositeColor( Color cCol)
{
   return Color( MAX_RGB - cCol.GetIntRed(),
                 MAX_RGB - cCol.GetIntGreen(),
                 MAX_RGB - cCol.GetIntBlue(),
                 cCol.GetIntAlpha()) ;
}

//----------------------------------------------------------------------------
Color
GetSurfBackColor( Color cCol)
{
   float fLum = ( cCol.GetRed() + cCol.GetGreen() + cCol.GetBlue()) / 3 ;
  // se opache
   if ( cCol.GetIntAlpha() > ALPHA_LIM)
      return Color( 0.4 * fLum + 0.4 * cCol.GetRed(),
                    0.4 * fLum + 0.4 * cCol.GetGreen(),
                    0.4 * fLum + 0.4 * cCol.GetBlue(),
                    cCol.GetAlpha()) ;
  // altrimenti semitrasparenti
   else
      return Color( 0.4 * fLum + 0.6 * cCol.GetRed(),
                    0.4 * fLum + 0.6 * cCol.GetGreen(),
                    0.4 * fLum + 0.6 * cCol.GetBlue(),
                    cCol.GetAlpha()) ;
}