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 #if !USE_SHARED_LIBRARIES
  19 IMPLEMENT_DYNAMIC_CLASS(wxPalette, wxGDIObject)
  20 #endif
  21
  22 /*
  23  * Palette
  24  *
  25  */
  26
  27 wxPaletteRefData::wxPaletteRefData()
  28 {
  29         m_palette = NULL ;
  30         m_count = 0 ;
  31 }
  32
  33 wxPaletteRefData::~wxPaletteRefData()
  34 {
  35         delete[] m_palette ;
  36 }
  37
  38 wxPalette::wxPalette()
  39 {
  40 }
  41
  42 wxPalette::wxPalette(int n, const unsigned char *red, const unsigned char *green, const unsigned char *blue)
  43 {
  44     Create(n, red, green, blue);
  45 }
  46
  47 wxPalette::~wxPalette()
  48 {
  49 }
  50
  51 bool wxPalette::Create(int n, const unsigned char *red, const unsigned char *green, const unsigned char *blue)
  52 {
  53   UnRef();
  54
  55   m_refData = new wxPaletteRefData;
  56
  57   M_PALETTEDATA->m_count = n ;
  58   M_PALETTEDATA->m_palette = new wxColour[n] ;
  59
  60   for ( int i = 0 ; i < n ; ++i)
  61   {
  62         M_PALETTEDATA->m_palette[i].Set( red[i] , green[i] , blue[i] ) ;
  63         }
  64
  65   return FALSE;
  66 }
  67
  68 int wxPalette::GetPixel(const unsigned char red, const unsigned char green, const unsigned char blue) const
  69 {
  70     if ( !m_refData )
  71         return -1;
  72
  73     long bestdiff = 3 * 256 ;
  74     long bestpos = 0 ;
  75     long currentdiff ;
  76
  77     for ( int i = 0  ; i < M_PALETTEDATA->m_count ; ++i )
  78     {
  79         const wxColour& col = &M_PALETTEDATA->m_palette[i] ;
  80         currentdiff = abs ( col.Red() - red ) + abs( col.Green() - green ) + abs ( col.Blue() - blue )  ;
  81         if ( currentdiff < bestdiff )
  82         {
  83                 bestdiff = currentdiff ;
  84                 bestpos = i ;
  85                 if ( bestdiff == 0 )
  86                         break ;
  87         }
  88     }
  89
  90     return bestpos;
  91 }
  92
  93 bool wxPalette::GetRGB(int index, unsigned char *red, unsigned char *green, unsigned char *blue) const
  94 {
  95     if ( !m_refData )
  96             return FALSE;
  97
  98     if (index < 0 || index >= M_PALETTEDATA->m_count)
  99         return FALSE;
 100
 101     const wxColour& col = &M_PALETTEDATA->m_palette[index] ;
 102     *red = col.Red() ;
 103     *green = col.Green() ;
 104     *blue = col.Blue() ;
 105
 106     return TRUE;
 107 }
 108
 109