src/mac/classic/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 #include "wx/defs.h"
  13
  14 #if wxUSE_PALETTE
  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     if (m_palette != NULL) {
  34         delete[] m_palette ;
  35         m_palette = NULL;
  36     }
  37 }
  38
  39 wxPalette::wxPalette()
  40 {
  41 }
  42
  43 wxPalette::wxPalette(int n, const unsigned char *red, const unsigned char *green, const unsigned char *blue)
  44 {
  45     Create(n, red, green, blue);
  46 }
  47
  48 wxPalette::~wxPalette()
  49 {
  50 }
  51
  52 bool wxPalette::Create(int n, const unsigned char *red, const unsigned char *green, const unsigned char *blue)
  53 {
  54     UnRef();
  55
  56     m_refData = new wxPaletteRefData;
  57
  58     M_PALETTEDATA->m_count = n ;
  59     M_PALETTEDATA->m_palette = new wxColour[n] ;
  60
  61     for ( int i = 0 ; i < n ; ++i)
  62     {
  63         M_PALETTEDATA->m_palette[i].Set( red[i] , green[i] , blue[i] ) ;
  64     }
  65
  66     return FALSE;
  67 }
  68
  69 int wxPalette::GetPixel(const unsigned char red, const unsigned char green, const unsigned char blue) const
  70 {
  71     if ( !m_refData )
  72         return -1;
  73
  74     long bestdiff = 3 * 256 ;
  75     long bestpos = 0 ;
  76     long currentdiff ;
  77
  78     for ( int i = 0  ; i < M_PALETTEDATA->m_count ; ++i )
  79     {
  80         const wxColour& col = &M_PALETTEDATA->m_palette[i] ;
  81         currentdiff = abs ( col.Red() - red ) + abs( col.Green() - green ) + abs ( col.Blue() - blue )  ;
  82         if ( currentdiff < bestdiff )
  83         {
  84             bestdiff = currentdiff ;
  85             bestpos = i ;
  86             if ( bestdiff == 0 )
  87                 break ;
  88         }
  89     }
  90
  91     return bestpos;
  92 }
  93
  94 bool wxPalette::GetRGB(int index, unsigned char *red, unsigned char *green, unsigned char *blue) const
  95 {
  96     if ( !m_refData )
  97         return FALSE;
  98
  99     if (index < 0 || index >= M_PALETTEDATA->m_count)
 100         return FALSE;
 101
 102     const wxColour& col = &M_PALETTEDATA->m_palette[index] ;
 103     *red = col.Red() ;
 104     *green = col.Green() ;
 105     *blue = col.Blue() ;
 106
 107     return TRUE;
 108 }
 109
 110 #endif
 111 // wxUSE_PALETTE
 112