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[wxWidgets.git] / 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