src/mac/palette.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        palette.cpp
   3 // Purpose:     wxPalette
   4 // Author:      AUTHOR
   5 // Modified by:
   6 // Created:     ??/??/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) AUTHOR
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  13 #pragma implementation "palette.h"
  14 #endif
  15
  16 #include "wx/palette.h"
  17
  18 IMPLEMENT_DYNAMIC_CLASS(wxPalette, wxGDIObject)
  19
  20 /*
  21  * Palette
  22  *
  23  */
  24
  25 wxPaletteRefData::wxPaletteRefData()
  26 {
  27         m_palette = NULL ;
  28         m_count = 0 ;
  29 }
  30
  31 wxPaletteRefData::~wxPaletteRefData()
  32 {
  33         delete[] m_palette ;
  34 }
  35
  36 wxPalette::wxPalette()
  37 {
  38 }
  39
  40 wxPalette::wxPalette(int n, const unsigned char *red, const unsigned char *green, const unsigned char *blue)
  41 {
  42     Create(n, red, green, blue);
  43 }
  44
  45 wxPalette::~wxPalette()
  46 {
  47 }
  48
  49 bool wxPalette::Create(int n, const unsigned char *red, const unsigned char *green, const unsigned char *blue)
  50 {
  51   UnRef();
  52
  53   m_refData = new wxPaletteRefData;
  54
  55   M_PALETTEDATA->m_count = n ;
  56   M_PALETTEDATA->m_palette = new wxColour[n] ;
  57
  58   for ( int i = 0 ; i < n ; ++i)
  59   {
  60         M_PALETTEDATA->m_palette[i].Set( red[i] , green[i] , blue[i] ) ;
  61         }
  62
  63   return FALSE;
  64 }
  65
  66 int wxPalette::GetPixel(const unsigned char red, const unsigned char green, const unsigned char blue) const
  67 {
  68     if ( !m_refData )
  69         return -1;
  70
  71     long bestdiff = 3 * 256 ;
  72     long bestpos = 0 ;
  73     long currentdiff ;
  74
  75     for ( int i = 0  ; i < M_PALETTEDATA->m_count ; ++i )
  76     {
  77         const wxColour& col = &M_PALETTEDATA->m_palette[i] ;
  78         currentdiff = abs ( col.Red() - red ) + abs( col.Green() - green ) + abs ( col.Blue() - blue )  ;
  79         if ( currentdiff < bestdiff )
  80         {
  81                 bestdiff = currentdiff ;
  82                 bestpos = i ;
  83                 if ( bestdiff == 0 )
  84                         break ;
  85         }
  86     }
  87
  88     return bestpos;
  89 }
  90
  91 bool wxPalette::GetRGB(int index, unsigned char *red, unsigned char *green, unsigned char *blue) const
  92 {
  93     if ( !m_refData )
  94             return FALSE;
  95
  96     if (index < 0 || index >= M_PALETTEDATA->m_count)
  97         return FALSE;
  98
  99     const wxColour& col = &M_PALETTEDATA->m_palette[index] ;
 100     *red = col.Red() ;
 101     *green = col.Green() ;
 102     *blue = col.Blue() ;
 103
 104     return TRUE;
 105 }
 106
 107