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 #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 IMPLEMENT_DYNAMIC_CLASS(wxPalette, wxGDIObject)
  23
  24 /*
  25  * Palette
  26  *
  27  */
  28
  29 wxPaletteRefData::wxPaletteRefData()
  30 {
  31     m_palette = NULL ;
  32     m_count = 0 ;
  33 }
  34
  35 wxPaletteRefData::~wxPaletteRefData()
  36 {
  37     if (m_palette != NULL) {
  38         delete[] m_palette ;
  39         m_palette = NULL;
  40     }
  41 }
  42
  43 wxPalette::wxPalette()
  44 {
  45 }
  46
  47 wxPalette::wxPalette(int n, const unsigned char *red, const unsigned char *green, const unsigned char *blue)
  48 {
  49     Create(n, red, green, blue);
  50 }
  51
  52 wxPalette::~wxPalette()
  53 {
  54 }
  55
  56 bool wxPalette::Create(int n, const unsigned char *red, const unsigned char *green, const unsigned char *blue)
  57 {
  58     UnRef();
  59
  60     m_refData = new wxPaletteRefData;
  61
  62     M_PALETTEDATA->m_count = n ;
  63     M_PALETTEDATA->m_palette = new wxColour[n] ;
  64
  65     for ( int i = 0 ; i < n ; ++i)
  66     {
  67         M_PALETTEDATA->m_palette[i].Set( red[i] , green[i] , blue[i] ) ;
  68     }
  69
  70     return FALSE;
  71 }
  72
  73 int wxPalette::GetPixel(const unsigned char red, const unsigned char green, const unsigned char blue) const
  74 {
  75     if ( !m_refData )
  76         return -1;
  77
  78     long bestdiff = 3 * 256 ;
  79     long bestpos = 0 ;
  80     long currentdiff ;
  81
  82     for ( int i = 0  ; i < M_PALETTEDATA->m_count ; ++i )
  83     {
  84         const wxColour& col = &M_PALETTEDATA->m_palette[i] ;
  85         currentdiff = abs ( col.Red() - red ) + abs( col.Green() - green ) + abs ( col.Blue() - blue )  ;
  86         if ( currentdiff < bestdiff )
  87         {
  88             bestdiff = currentdiff ;
  89             bestpos = i ;
  90             if ( bestdiff == 0 )
  91                 break ;
  92         }
  93     }
  94
  95     return bestpos;
  96 }
  97
  98 bool wxPalette::GetRGB(int index, unsigned char *red, unsigned char *green, unsigned char *blue) const
  99 {
 100     if ( !m_refData )
 101         return FALSE;
 102
 103     if (index < 0 || index >= M_PALETTEDATA->m_count)
 104         return FALSE;
 105
 106     const wxColour& col = &M_PALETTEDATA->m_palette[index] ;
 107     *red = col.Red() ;
 108     *green = col.Green() ;
 109     *blue = col.Blue() ;
 110
 111     return TRUE;
 112 }
 113
 114 #endif
 115 // wxUSE_PALETTE
 116