| 1 | ///////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: src/mgl/palette.cpp |
| 3 | // Author: Vaclav Slavik |
| 4 | // Created: 2001/03/11 |
| 5 | // Id: $Id$ |
| 6 | // Copyright: (c) 2001-2002 SciTech Software, Inc. (www.scitechsoft.com) |
| 7 | // Licence: wxWindows licence |
| 8 | ///////////////////////////////////////////////////////////////////////////// |
| 9 | |
| 10 | // For compilers that support precompilation, includes "wx.h". |
| 11 | #include "wx/wxprec.h" |
| 12 | |
| 13 | #ifdef __BORLANDC__ |
| 14 | #pragma hdrstop |
| 15 | #endif |
| 16 | |
| 17 | #include "wx/palette.h" |
| 18 | #include <mgraph.h> |
| 19 | |
| 20 | |
| 21 | //----------------------------------------------------------------------------- |
| 22 | // wxPalette |
| 23 | //----------------------------------------------------------------------------- |
| 24 | |
| 25 | class wxPaletteRefData: public wxObjectRefData |
| 26 | { |
| 27 | public: |
| 28 | wxPaletteRefData(void); |
| 29 | virtual ~wxPaletteRefData(void); |
| 30 | |
| 31 | int m_count; |
| 32 | palette_t *m_entries; |
| 33 | }; |
| 34 | |
| 35 | wxPaletteRefData::wxPaletteRefData() |
| 36 | { |
| 37 | m_count = 0; |
| 38 | m_entries = NULL; |
| 39 | } |
| 40 | |
| 41 | wxPaletteRefData::~wxPaletteRefData() |
| 42 | { |
| 43 | delete[] m_entries; |
| 44 | } |
| 45 | |
| 46 | //----------------------------------------------------------------------------- |
| 47 | |
| 48 | #define M_PALETTEDATA ((wxPaletteRefData *)m_refData) |
| 49 | |
| 50 | IMPLEMENT_DYNAMIC_CLASS(wxPalette,wxGDIObject) |
| 51 | |
| 52 | wxPalette::wxPalette() |
| 53 | { |
| 54 | m_refData = NULL; |
| 55 | } |
| 56 | |
| 57 | wxPalette::wxPalette(int n, const unsigned char *red, const unsigned char *green, const unsigned char *blue) |
| 58 | { |
| 59 | Create(n, red, green, blue); |
| 60 | } |
| 61 | |
| 62 | wxPalette::~wxPalette() |
| 63 | { |
| 64 | } |
| 65 | |
| 66 | bool wxPalette::Create(int n, |
| 67 | const unsigned char *red, |
| 68 | const unsigned char *green, |
| 69 | const unsigned char *blue) |
| 70 | { |
| 71 | UnRef(); |
| 72 | m_refData = new wxPaletteRefData(); |
| 73 | |
| 74 | M_PALETTEDATA->m_count = n; |
| 75 | M_PALETTEDATA->m_entries = new palette_t[n]; |
| 76 | |
| 77 | palette_t *e = M_PALETTEDATA->m_entries; |
| 78 | for (int i = 0; i < n; i++, e++) |
| 79 | { |
| 80 | e->red = red[i]; |
| 81 | e->green = green[i]; |
| 82 | e->blue = blue[i]; |
| 83 | e->alpha = 0; |
| 84 | } |
| 85 | |
| 86 | return true; |
| 87 | } |
| 88 | |
| 89 | int wxPalette::GetPixel(unsigned char red, |
| 90 | unsigned char green, |
| 91 | unsigned char blue) const |
| 92 | { |
| 93 | if (!m_refData) return wxNOT_FOUND; |
| 94 | |
| 95 | int closest = 0; |
| 96 | double d, distance = 1000.0; // max. dist is 256 |
| 97 | |
| 98 | palette_t *e = M_PALETTEDATA->m_entries; |
| 99 | for (int i = 0; i < M_PALETTEDATA->m_count; i++, e++) |
| 100 | { |
| 101 | if ((d = 0.299 * abs(red - e->red) + |
| 102 | 0.587 * abs(green - e->green) + |
| 103 | 0.114 * abs(blue - e->blue)) < distance) { |
| 104 | distance = d; |
| 105 | closest = i; |
| 106 | } |
| 107 | } |
| 108 | |
| 109 | return closest; |
| 110 | } |
| 111 | |
| 112 | bool wxPalette::GetRGB(int pixel, |
| 113 | unsigned char *red, |
| 114 | unsigned char *green, |
| 115 | unsigned char *blue) const |
| 116 | { |
| 117 | if (!m_refData) return false; |
| 118 | if (pixel >= M_PALETTEDATA->m_count) return false; |
| 119 | |
| 120 | palette_t& p = M_PALETTEDATA->m_entries[pixel]; |
| 121 | if (red) *red = p.red; |
| 122 | if (green) *green = p.green; |
| 123 | if (blue) *blue = p.blue; |
| 124 | return true; |
| 125 | } |
| 126 | |
| 127 | int wxPalette::GetColoursCount() const |
| 128 | { |
| 129 | wxCHECK_MSG( Ok(), 0, wxT("invalid palette") ); |
| 130 | return M_PALETTEDATA->m_count; |
| 131 | } |
| 132 | |
| 133 | palette_t *wxPalette::GetMGLpalette_t() const |
| 134 | { |
| 135 | wxCHECK_MSG( Ok(), NULL, wxT("invalid palette") ); |
| 136 | return M_PALETTEDATA->m_entries; |
| 137 | } |