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1 | ///////////////////////////////////////////////////////////////////////////// | |
2 | // Name: src/generic/paletteg.cpp | |
3 | // Purpose: | |
4 | // Author: Robert Roebling | |
5 | // Created: 01/02/97 | |
6 | // RCS-ID: $Id$ | |
7 | // Copyright: (c) 1998 Robert Roebling and Julian Smart | |
8 | // Licence: wxWindows licence | |
9 | ///////////////////////////////////////////////////////////////////////////// | |
10 | ||
11 | // For compilers that support precompilation, includes "wx.h". | |
12 | #include "wx/wxprec.h" | |
13 | ||
14 | #if defined(__BORLANDC__) | |
15 | #pragma hdrstop | |
16 | #endif | |
17 | ||
18 | #if wxUSE_PALETTE | |
19 | ||
20 | #include "wx/palette.h" | |
21 | ||
22 | //----------------------------------------------------------------------------- | |
23 | // wxPalette | |
24 | //----------------------------------------------------------------------------- | |
25 | ||
26 | struct wxPaletteEntry | |
27 | { | |
28 | unsigned char red, green, blue; | |
29 | }; | |
30 | ||
31 | class wxPaletteRefData : public wxGDIRefData | |
32 | { | |
33 | public: | |
34 | wxPaletteRefData(); | |
35 | wxPaletteRefData(const wxPaletteRefData& palette); | |
36 | virtual ~wxPaletteRefData(); | |
37 | ||
38 | int m_count; | |
39 | wxPaletteEntry *m_entries; | |
40 | }; | |
41 | ||
42 | wxPaletteRefData::wxPaletteRefData() | |
43 | { | |
44 | m_count = 0; | |
45 | m_entries = NULL; | |
46 | } | |
47 | ||
48 | wxPaletteRefData::wxPaletteRefData(const wxPaletteRefData& palette) | |
49 | { | |
50 | m_count = palette.m_count; | |
51 | m_entries = new wxPaletteEntry[m_count]; | |
52 | for ( int i = 0; i < m_count; i++ ) | |
53 | m_entries[i] = palette.m_entries[i]; | |
54 | } | |
55 | ||
56 | wxPaletteRefData::~wxPaletteRefData() | |
57 | { | |
58 | delete[] m_entries; | |
59 | } | |
60 | ||
61 | //----------------------------------------------------------------------------- | |
62 | ||
63 | #define M_PALETTEDATA ((wxPaletteRefData *)m_refData) | |
64 | ||
65 | IMPLEMENT_DYNAMIC_CLASS(wxPalette,wxGDIObject) | |
66 | ||
67 | wxPalette::wxPalette() | |
68 | { | |
69 | m_refData = NULL; | |
70 | } | |
71 | ||
72 | wxPalette::wxPalette(int n, const unsigned char *red, const unsigned char *green, const unsigned char *blue) | |
73 | { | |
74 | Create(n, red, green, blue); | |
75 | } | |
76 | ||
77 | wxPalette::~wxPalette() | |
78 | { | |
79 | } | |
80 | ||
81 | int wxPalette::GetColoursCount() const | |
82 | { | |
83 | if (m_refData) | |
84 | return M_PALETTEDATA->m_count; | |
85 | ||
86 | return 0; | |
87 | } | |
88 | ||
89 | bool wxPalette::Create(int n, | |
90 | const unsigned char *red, | |
91 | const unsigned char *green, | |
92 | const unsigned char *blue) | |
93 | { | |
94 | UnRef(); | |
95 | m_refData = new wxPaletteRefData(); | |
96 | ||
97 | M_PALETTEDATA->m_count = n; | |
98 | M_PALETTEDATA->m_entries = new wxPaletteEntry[n]; | |
99 | ||
100 | wxPaletteEntry *e = M_PALETTEDATA->m_entries; | |
101 | for (int i = 0; i < n; i++, e++) | |
102 | { | |
103 | e->red = red[i]; | |
104 | e->green = green[i]; | |
105 | e->blue = blue[i]; | |
106 | } | |
107 | ||
108 | return true; | |
109 | } | |
110 | ||
111 | int wxPalette::GetPixel( unsigned char red, | |
112 | unsigned char green, | |
113 | unsigned char blue ) const | |
114 | { | |
115 | if (!m_refData) return wxNOT_FOUND; | |
116 | ||
117 | int closest = 0; | |
118 | double d,distance = 1000.0; // max. dist is 256 | |
119 | ||
120 | wxPaletteEntry *e = M_PALETTEDATA->m_entries; | |
121 | for (int i = 0; i < M_PALETTEDATA->m_count; i++, e++) | |
122 | { | |
123 | if ((d = 0.299 * abs(red - e->red) + | |
124 | 0.587 * abs(green - e->green) + | |
125 | 0.114 * abs(blue - e->blue)) < distance) { | |
126 | distance = d; | |
127 | closest = i; | |
128 | } | |
129 | } | |
130 | return closest; | |
131 | } | |
132 | ||
133 | bool wxPalette::GetRGB(int pixel, | |
134 | unsigned char *red, | |
135 | unsigned char *green, | |
136 | unsigned char *blue) const | |
137 | { | |
138 | if (!m_refData) return false; | |
139 | if (pixel >= M_PALETTEDATA->m_count) return false; | |
140 | ||
141 | wxPaletteEntry& p = M_PALETTEDATA->m_entries[pixel]; | |
142 | if (red) *red = p.red; | |
143 | if (green) *green = p.green; | |
144 | if (blue) *blue = p.blue; | |
145 | return true; | |
146 | } | |
147 | ||
148 | wxGDIRefData *wxPalette::CreateGDIRefData() const | |
149 | { | |
150 | return new wxPaletteRefData; | |
151 | } | |
152 | ||
153 | wxGDIRefData *wxPalette::CloneGDIRefData(const wxGDIRefData *data) const | |
154 | { | |
155 | return new wxPaletteRefData(*wx_static_cast(const wxPaletteRefData *, data)); | |
156 | } | |
157 | ||
158 | #endif // wxUSE_PALETTE |