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c801d85f 1/////////////////////////////////////////////////////////////////////////////
d275c7eb 2// Name: src/generic/paletteg.cpp
c801d85f
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3// Purpose:
4// Author: Robert Roebling
5// Created: 01/02/97
88ef3a57 6// RCS-ID: $Id$
6aa89a22 7// Copyright: (c) 1998 Robert Roebling and Julian Smart
65571936 8// Licence: wxWindows licence
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9/////////////////////////////////////////////////////////////////////////////
10
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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
c801d85f 19
d275c7eb 20#include "wx/palette.h"
83624f79 21
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22//-----------------------------------------------------------------------------
23// wxPalette
24//-----------------------------------------------------------------------------
25
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26struct wxPaletteEntry
27{
28 unsigned char red, green, blue;
29};
30
8f884a0d 31class wxPaletteRefData : public wxGDIRefData
c801d85f 32{
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33public:
34 wxPaletteRefData();
35 wxPaletteRefData(const wxPaletteRefData& palette);
36 virtual ~wxPaletteRefData();
8bbe427f 37
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38 int m_count;
39 wxPaletteEntry *m_entries;
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40};
41
8bbe427f 42wxPaletteRefData::wxPaletteRefData()
c801d85f 43{
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44 m_count = 0;
45 m_entries = NULL;
8fc613f1 46}
c801d85f 47
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48wxPaletteRefData::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
8bbe427f 56wxPaletteRefData::~wxPaletteRefData()
c801d85f 57{
cb332bc6 58 delete[] m_entries;
8fc613f1 59}
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60
61//-----------------------------------------------------------------------------
62
63#define M_PALETTEDATA ((wxPaletteRefData *)m_refData)
64
65IMPLEMENT_DYNAMIC_CLASS(wxPalette,wxGDIObject)
66
8bbe427f 67wxPalette::wxPalette()
c801d85f 68{
cb332bc6 69 m_refData = NULL;
8fc613f1 70}
c801d85f 71
cb332bc6 72wxPalette::wxPalette(int n, const unsigned char *red, const unsigned char *green, const unsigned char *blue)
c801d85f 73{
cb332bc6 74 Create(n, red, green, blue);
8fc613f1 75}
c801d85f 76
8bbe427f 77wxPalette::~wxPalette()
c801d85f 78{
8fc613f1 79}
c801d85f 80
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81int wxPalette::GetColoursCount() const
82{
83 if (m_refData)
84 return M_PALETTEDATA->m_count;
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85
86 return 0;
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87}
88
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89bool wxPalette::Create(int n,
90 const unsigned char *red,
d275c7eb 91 const unsigned char *green,
cb332bc6 92 const unsigned char *blue)
c801d85f 93{
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94 UnRef();
95 m_refData = new wxPaletteRefData();
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96
97 M_PALETTEDATA->m_count = n;
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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
ca65c044 108 return true;
8fc613f1 109}
c801d85f 110
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111int wxPalette::GetPixel( unsigned char red,
112 unsigned char green,
113 unsigned char blue ) const
c801d85f 114{
88ef3a57 115 if (!m_refData) return wxNOT_FOUND;
cb332bc6 116
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117 int closest = 0;
118 double d,distance = 1000.0; // max. dist is 256
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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 }
d275c7eb 130 return closest;
8fc613f1 131}
c801d85f 132
d275c7eb 133bool wxPalette::GetRGB(int pixel,
cb332bc6 134 unsigned char *red,
d275c7eb 135 unsigned char *green,
cb332bc6 136 unsigned char *blue) const
c801d85f 137{
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138 if (!m_refData) return false;
139 if (pixel >= M_PALETTEDATA->m_count) return false;
d275c7eb 140
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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;
ca65c044 145 return true;
8fc613f1 146}
c801d85f 147
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148wxGDIRefData *wxPalette::CreateGDIRefData() const
149{
150 return new wxPaletteRefData;
151}
152
153wxGDIRefData *wxPalette::CloneGDIRefData(const wxGDIRefData *data) const
154{
5c33522f 155 return new wxPaletteRefData(*static_cast<const wxPaletteRefData *>(data));
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156}
157
d275c7eb 158#endif // wxUSE_PALETTE