src/mac/palette.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        palette.cpp
   3 // Purpose:     wxPalette
   4 // Author:      Stefan Csomor
   5 // Modified by:
   6 // Created:     1998-01-01
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Stefan Csomor
   9 // Licence:       wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  13 #pragma implementation "palette.h"
  14 #endif
  15
  16 #include "wx/defs.h"
  17
  18 #if wxUSE_PALETTE
  19
  20 #include "wx/palette.h"
  21
  22 #if !USE_SHARED_LIBRARIES
  23 IMPLEMENT_DYNAMIC_CLASS(wxPalette, wxGDIObject)
  24 #endif
  25
  26 /*
  27  * Palette
  28  *
  29  */
  30
  31 wxPaletteRefData::wxPaletteRefData()
  32 {
  33     m_palette = NULL ;
  34     m_count = 0 ;
  35 }
  36
  37 wxPaletteRefData::~wxPaletteRefData()
  38 {
  39     if (m_palette != NULL) {
  40         delete[] m_palette ;
  41         m_palette = NULL;
  42     }
  43 }
  44
  45 wxPalette::wxPalette()
  46 {
  47 }
  48
  49 wxPalette::wxPalette(int n, const unsigned char *red, const unsigned char *green, const unsigned char *blue)
  50 {
  51     Create(n, red, green, blue);
  52 }
  53
  54 wxPalette::~wxPalette()
  55 {
  56 }
  57
  58 bool wxPalette::Create(int n, const unsigned char *red, const unsigned char *green, const unsigned char *blue)
  59 {
  60     UnRef();
  61
  62     m_refData = new wxPaletteRefData;
  63
  64     M_PALETTEDATA->m_count = n ;
  65     M_PALETTEDATA->m_palette = new wxColour[n] ;
  66
  67     for ( int i = 0 ; i < n ; ++i)
  68     {
  69         M_PALETTEDATA->m_palette[i].Set( red[i] , green[i] , blue[i] ) ;
  70     }
  71
  72     return FALSE;
  73 }
  74
  75 int wxPalette::GetPixel(const unsigned char red, const unsigned char green, const unsigned char blue) const
  76 {
  77     if ( !m_refData )
  78         return -1;
  79
  80     long bestdiff = 3 * 256 ;
  81     long bestpos = 0 ;
  82     long currentdiff ;
  83
  84     for ( int i = 0  ; i < M_PALETTEDATA->m_count ; ++i )
  85     {
  86         const wxColour& col = &M_PALETTEDATA->m_palette[i] ;
  87         currentdiff = abs ( col.Red() - red ) + abs( col.Green() - green ) + abs ( col.Blue() - blue )  ;
  88         if ( currentdiff < bestdiff )
  89         {
  90             bestdiff = currentdiff ;
  91             bestpos = i ;
  92             if ( bestdiff == 0 )
  93                 break ;
  94         }
  95     }
  96
  97     return bestpos;
  98 }
  99
 100 bool wxPalette::GetRGB(int index, unsigned char *red, unsigned char *green, unsigned char *blue) const
 101 {
 102     if ( !m_refData )
 103         return FALSE;
 104
 105     if (index < 0 || index >= M_PALETTEDATA->m_count)
 106         return FALSE;
 107
 108     const wxColour& col = &M_PALETTEDATA->m_palette[index] ;
 109     *red = col.Red() ;
 110     *green = col.Green() ;
 111     *blue = col.Blue() ;
 112
 113     return TRUE;
 114 }
 115
 116 #endif
 117 // wxUSE_PALETTE
 118