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 // Copyright:   (c) Stefan Csomor
   8 // Licence:     wxWindows licence
   9 /////////////////////////////////////////////////////////////////////////////
  10
  11 #include "wx/wxprec.h"
  12
  13 #if wxUSE_PALETTE
  14
  15 #include "wx/palette.h"
  16 #include "wx/colour.h"
  17
  18 IMPLEMENT_DYNAMIC_CLASS(wxPalette, wxGDIObject)
  19
  20 // ============================================================================
  21 // wxPaletteRefData
  22 // ============================================================================
  23
  24 class WXDLLEXPORT wxPaletteRefData: public wxGDIRefData
  25 {
  26 public:
  27     wxPaletteRefData();
  28     wxPaletteRefData(const wxPaletteRefData& data);
  29     virtual ~wxPaletteRefData();
  30
  31     virtual bool IsOk() const { return m_count > 0; }
  32
  33 protected:
  34     wxColour* m_palette;
  35     wxInt32   m_count;
  36
  37     friend class WXDLLIMPEXP_FWD_CORE wxPalette;
  38
  39     wxDECLARE_NO_ASSIGN_CLASS(wxPaletteRefData);
  40 };
  41
  42 wxPaletteRefData::wxPaletteRefData()
  43 {
  44     m_palette = NULL;
  45     m_count = 0;
  46 }
  47
  48 wxPaletteRefData::wxPaletteRefData(const wxPaletteRefData& data) : wxGDIRefData()
  49 {
  50     m_count = data.m_count;
  51     m_palette = new wxColour[m_count];
  52     for ( wxInt32 i = 0; i < m_count; i++ )
  53         m_palette[i] = data.m_palette[i];
  54 }
  55
  56 wxPaletteRefData::~wxPaletteRefData()
  57 {
  58     delete[] m_palette;
  59 }
  60
  61 // ============================================================================
  62 // wxPalette
  63 // ============================================================================
  64
  65 wxPalette::wxPalette()
  66 {
  67 }
  68
  69 wxPalette::wxPalette(int n, const unsigned char *red, const unsigned char *green, const unsigned char *blue)
  70 {
  71     Create(n, red, green, blue);
  72 }
  73
  74 wxPalette::~wxPalette()
  75 {
  76 }
  77
  78 bool wxPalette::Create(int n, const unsigned char *red, const unsigned char *green, const unsigned char *blue)
  79 {
  80     UnRef();
  81
  82     m_refData = new wxPaletteRefData;
  83
  84     M_PALETTEDATA->m_count = n ;
  85     M_PALETTEDATA->m_palette = new wxColour[n] ;
  86
  87     for ( int i = 0 ; i < n ; ++i)
  88     {
  89         M_PALETTEDATA->m_palette[i].Set( red[i] , green[i] , blue[i] ) ;
  90     }
  91
  92     return false;
  93 }
  94
  95 int wxPalette::GetPixel(unsigned char red, unsigned char green, unsigned char blue) const
  96 {
  97     if ( !m_refData )
  98         return wxNOT_FOUND;
  99
 100     long bestdiff = 3 * 256 ;
 101     long bestpos = 0 ;
 102     long currentdiff ;
 103
 104     for ( int i = 0  ; i < M_PALETTEDATA->m_count ; ++i )
 105     {
 106         const wxColour& col = M_PALETTEDATA->m_palette[i] ;
 107         currentdiff = abs ( col.Red() - red ) + abs( col.Green() - green ) + abs ( col.Blue() - blue )  ;
 108         if ( currentdiff < bestdiff )
 109         {
 110             bestdiff = currentdiff ;
 111             bestpos = i ;
 112             if ( bestdiff == 0 )
 113                 break ;
 114         }
 115     }
 116
 117     return bestpos;
 118 }
 119
 120 bool wxPalette::GetRGB(int index, unsigned char *red, unsigned char *green, unsigned char *blue) const
 121 {
 122     if ( !m_refData )
 123         return false;
 124
 125     if (index < 0 || index >= M_PALETTEDATA->m_count)
 126         return false;
 127
 128     const wxColour& col = M_PALETTEDATA->m_palette[index] ;
 129     *red = col.Red() ;
 130     *green = col.Green() ;
 131     *blue = col.Blue() ;
 132
 133     return true;
 134 }
 135
 136 int wxPalette::GetColoursCount() const
 137 {
 138     if (m_refData)
 139         return M_PALETTEDATA->m_count;
 140
 141     return 0;
 142 }
 143
 144 wxGDIRefData *wxPalette::CreateGDIRefData() const
 145 {
 146     return new wxPaletteRefData;
 147 }
 148
 149 wxGDIRefData *wxPalette::CloneGDIRefData(const wxGDIRefData *data) const
 150 {
 151     return new wxPaletteRefData(*static_cast<const wxPaletteRefData *>(data));
 152 }
 153
 154 #endif // wxUSE_PALETTE