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