| 1 | ///////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: src/generic/paletteg.cpp |
| 3 | // Purpose: |
| 4 | // Author: Robert Roebling |
| 5 | // Created: 01/02/97 |
| 6 | // Id: |
| 7 | // Copyright: (c) 1998 Robert Roebling, Julian Smart and Markus Holzem |
| 8 | // Licence: wxWindows licence |
| 9 | ///////////////////////////////////////////////////////////////////////////// |
| 10 | |
| 11 | |
| 12 | #ifdef __GNUG__ |
| 13 | #pragma implementation "paletteg.h" |
| 14 | #endif |
| 15 | |
| 16 | // For compilers that support precompilation, includes "wx.h". |
| 17 | #include "wx/wxprec.h" |
| 18 | |
| 19 | #if defined(__BORLANDC__) |
| 20 | #pragma hdrstop |
| 21 | #endif |
| 22 | |
| 23 | #if wxUSE_PALETTE |
| 24 | |
| 25 | #include "wx/palette.h" |
| 26 | |
| 27 | //----------------------------------------------------------------------------- |
| 28 | // wxPalette |
| 29 | //----------------------------------------------------------------------------- |
| 30 | |
| 31 | struct wxPaletteEntry |
| 32 | { |
| 33 | unsigned char red, green, blue; |
| 34 | }; |
| 35 | |
| 36 | class wxPaletteRefData: public wxObjectRefData |
| 37 | { |
| 38 | public: |
| 39 | |
| 40 | wxPaletteRefData(void); |
| 41 | ~wxPaletteRefData(void); |
| 42 | |
| 43 | int m_count; |
| 44 | wxPaletteEntry *m_entries; |
| 45 | }; |
| 46 | |
| 47 | wxPaletteRefData::wxPaletteRefData() |
| 48 | { |
| 49 | m_count = 0; |
| 50 | m_entries = NULL; |
| 51 | } |
| 52 | |
| 53 | wxPaletteRefData::~wxPaletteRefData() |
| 54 | { |
| 55 | delete[] m_entries; |
| 56 | } |
| 57 | |
| 58 | //----------------------------------------------------------------------------- |
| 59 | |
| 60 | #define M_PALETTEDATA ((wxPaletteRefData *)m_refData) |
| 61 | |
| 62 | IMPLEMENT_DYNAMIC_CLASS(wxPalette,wxGDIObject) |
| 63 | |
| 64 | wxPalette::wxPalette() |
| 65 | { |
| 66 | m_refData = NULL; |
| 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(const wxPalette& palette) |
| 75 | { |
| 76 | Ref(palette); |
| 77 | } |
| 78 | |
| 79 | wxPalette::~wxPalette() |
| 80 | { |
| 81 | } |
| 82 | |
| 83 | wxPalette& wxPalette::operator = (const wxPalette& palette) |
| 84 | { |
| 85 | if (*this == palette) return (*this); |
| 86 | Ref(palette); |
| 87 | return *this; |
| 88 | } |
| 89 | |
| 90 | bool wxPalette::operator == (const wxPalette& palette) |
| 91 | { |
| 92 | return m_refData == palette.m_refData; |
| 93 | } |
| 94 | |
| 95 | bool wxPalette::operator != (const wxPalette& palette) |
| 96 | { |
| 97 | return m_refData != palette.m_refData; |
| 98 | } |
| 99 | |
| 100 | bool wxPalette::Ok(void) const |
| 101 | { |
| 102 | return (m_refData != NULL); |
| 103 | } |
| 104 | |
| 105 | bool wxPalette::Create(int n, |
| 106 | const unsigned char *red, |
| 107 | const unsigned char *green, |
| 108 | const unsigned char *blue) |
| 109 | { |
| 110 | UnRef(); |
| 111 | m_refData = new wxPaletteRefData(); |
| 112 | |
| 113 | M_PALETTEDATA->m_count = n; |
| 114 | M_PALETTEDATA->m_entries = new wxPaletteEntry[n]; |
| 115 | |
| 116 | wxPaletteEntry *e = M_PALETTEDATA->m_entries; |
| 117 | for (int i = 0; i < n; i++, e++) |
| 118 | { |
| 119 | e->red = red[i]; |
| 120 | e->green = green[i]; |
| 121 | e->blue = blue[i]; |
| 122 | } |
| 123 | |
| 124 | return TRUE; |
| 125 | } |
| 126 | |
| 127 | int wxPalette::GetPixel( const unsigned char red, |
| 128 | const unsigned char green, |
| 129 | const unsigned char blue ) const |
| 130 | { |
| 131 | if (!m_refData) return FALSE; |
| 132 | |
| 133 | int closest = 0; |
| 134 | double d,distance = 1000.0; // max. dist is 256 |
| 135 | |
| 136 | wxPaletteEntry *e = M_PALETTEDATA->m_entries; |
| 137 | for (int i = 0; i < M_PALETTEDATA->m_count; i++, e++) |
| 138 | { |
| 139 | if ((d = 0.299 * abs(red - e->red) + |
| 140 | 0.587 * abs(green - e->green) + |
| 141 | 0.114 * abs(blue - e->blue)) < distance) { |
| 142 | distance = d; |
| 143 | closest = i; |
| 144 | } |
| 145 | } |
| 146 | return closest; |
| 147 | } |
| 148 | |
| 149 | bool wxPalette::GetRGB(int pixel, |
| 150 | unsigned char *red, |
| 151 | unsigned char *green, |
| 152 | unsigned char *blue) const |
| 153 | { |
| 154 | if (!m_refData) return FALSE; |
| 155 | if (pixel >= M_PALETTEDATA->m_count) return FALSE; |
| 156 | |
| 157 | wxPaletteEntry& p = M_PALETTEDATA->m_entries[pixel]; |
| 158 | if (red) *red = p.red; |
| 159 | if (green) *green = p.green; |
| 160 | if (blue) *blue = p.blue; |
| 161 | return TRUE; |
| 162 | } |
| 163 | |
| 164 | #endif // wxUSE_PALETTE |
| 165 | |
| 166 | |