src/osx/palette.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/osx/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/wxprec.h"
  13
  14 #if wxUSE_PALETTE
  15
  16 #include "wx/palette.h"
  17 #include "wx/colour.h"
  18
  19 IMPLEMENT_DYNAMIC_CLASS(wxPalette, wxGDIObject)
  20
  21 // ============================================================================
  22 // wxPaletteRefData
  23 // ============================================================================
  24
  25 class WXDLLEXPORT wxPaletteRefData: public wxGDIRefData
  26 {
  27 public:
  28     wxPaletteRefData();
  29     wxPaletteRefData(const wxPaletteRefData& data);
  30     virtual ~wxPaletteRefData();
  31
  32     virtual bool IsOk() const { return m_count > 0; }
  33
  34 protected:
  35     wxColour* m_palette;
  36     wxInt32   m_count;
  37
  38     friend class WXDLLIMPEXP_FWD_CORE wxPalette;
  39
  40     wxDECLARE_NO_ASSIGN_CLASS(wxPaletteRefData);
  41 };
  42
  43 wxPaletteRefData::wxPaletteRefData()
  44 {
  45     m_palette = NULL;
  46     m_count = 0;
  47 }
  48
  49 wxPaletteRefData::wxPaletteRefData(const wxPaletteRefData& data) : wxGDIRefData()
  50 {
  51     m_count = data.m_count;
  52     m_palette = new wxColour[m_count];
  53     for ( wxInt32 i = 0; i < m_count; i++ )
  54         m_palette[i] = data.m_palette[i];
  55 }
  56
  57 wxPaletteRefData::~wxPaletteRefData()
  58 {
  59     delete[] m_palette;
  60 }
  61
  62 // ============================================================================
  63 // wxPalette
  64 // ============================================================================
  65
  66 wxPalette::wxPalette()
  67 {
  68 }
  69
  70 wxPalette::wxPalette(int n, const unsigned char *red, const unsigned char *green, const unsigned char *blue)
  71 {
  72     Create(n, red, green, blue);
  73 }
  74
  75 wxPalette::~wxPalette()
  76 {
  77 }
  78
  79 bool wxPalette::Create(int n, const unsigned char *red, const unsigned char *green, const unsigned char *blue)
  80 {
  81     UnRef();
  82
  83     m_refData = new wxPaletteRefData;
  84
  85     M_PALETTEDATA->m_count = n ;
  86     M_PALETTEDATA->m_palette = new wxColour[n] ;
  87
  88     for ( int i = 0 ; i < n ; ++i)
  89     {
  90         M_PALETTEDATA->m_palette[i].Set( red[i] , green[i] , blue[i] ) ;
  91     }
  92
  93     return false;
  94 }
  95
  96 int wxPalette::GetPixel(unsigned char red, unsigned char green, unsigned char blue) const
  97 {
  98     if ( !m_refData )
  99         return wxNOT_FOUND;
 100
 101     long bestdiff = 3 * 256 ;
 102     long bestpos = 0 ;
 103     long currentdiff ;
 104
 105     for ( int i = 0  ; i < M_PALETTEDATA->m_count ; ++i )
 106     {
 107         const wxColour& col = M_PALETTEDATA->m_palette[i] ;
 108         currentdiff = abs ( col.Red() - red ) + abs( col.Green() - green ) + abs ( col.Blue() - blue )  ;
 109         if ( currentdiff < bestdiff )
 110         {
 111             bestdiff = currentdiff ;
 112             bestpos = i ;
 113             if ( bestdiff == 0 )
 114                 break ;
 115         }
 116     }
 117
 118     return bestpos;
 119 }
 120
 121 bool wxPalette::GetRGB(int index, unsigned char *red, unsigned char *green, unsigned char *blue) const
 122 {
 123     if ( !m_refData )
 124         return false;
 125
 126     if (index < 0 || index >= M_PALETTEDATA->m_count)
 127         return false;
 128
 129     const wxColour& col = M_PALETTEDATA->m_palette[index] ;
 130     *red = col.Red() ;
 131     *green = col.Green() ;
 132     *blue = col.Blue() ;
 133
 134     return true;
 135 }
 136
 137 int wxPalette::GetColoursCount() const
 138 {
 139     if (m_refData)
 140         return M_PALETTEDATA->m_count;
 141
 142     return 0;
 143 }
 144
 145 wxGDIRefData *wxPalette::CreateGDIRefData() const
 146 {
 147     return new wxPaletteRefData;
 148 }
 149
 150 wxGDIRefData *wxPalette::CloneGDIRefData(const wxGDIRefData *data) const
 151 {
 152     return new wxPaletteRefData(*static_cast<const wxPaletteRefData *>(data));
 153 }
 154
 155 #endif // wxUSE_PALETTE