146 lines
3.3 KiB
C++
146 lines
3.3 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// Name: src/generic/paletteg.cpp
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// Purpose:
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// Author: Robert Roebling
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// Created: 01/02/97
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// RCS-ID: $Id: paletteg.cpp 42752 2006-10-30 19:26:48Z VZ $
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// Copyright: (c) 1998 Robert Roebling and Julian Smart
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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// For compilers that support precompilation, includes "wx.h".
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#include "wx/wxprec.h"
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#if defined(__BORLANDC__)
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#pragma hdrstop
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#endif
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#if wxUSE_PALETTE
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#include "wx/palette.h"
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//-----------------------------------------------------------------------------
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// wxPalette
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//-----------------------------------------------------------------------------
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struct wxPaletteEntry
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{
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unsigned char red, green, blue;
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};
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class wxPaletteRefData: public wxObjectRefData
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{
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public:
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wxPaletteRefData(void);
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virtual ~wxPaletteRefData(void);
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int m_count;
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wxPaletteEntry *m_entries;
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};
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wxPaletteRefData::wxPaletteRefData()
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{
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m_count = 0;
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m_entries = NULL;
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}
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wxPaletteRefData::~wxPaletteRefData()
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{
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delete[] m_entries;
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}
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//-----------------------------------------------------------------------------
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#define M_PALETTEDATA ((wxPaletteRefData *)m_refData)
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IMPLEMENT_DYNAMIC_CLASS(wxPalette,wxGDIObject)
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wxPalette::wxPalette()
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{
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m_refData = NULL;
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}
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wxPalette::wxPalette(int n, const unsigned char *red, const unsigned char *green, const unsigned char *blue)
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{
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Create(n, red, green, blue);
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}
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wxPalette::~wxPalette()
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{
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}
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bool wxPalette::IsOk() const
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{
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return (m_refData != NULL);
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}
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int wxPalette::GetColoursCount() const
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{
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if (m_refData)
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return M_PALETTEDATA->m_count;
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return 0;
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}
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bool wxPalette::Create(int n,
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const unsigned char *red,
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const unsigned char *green,
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const unsigned char *blue)
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{
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UnRef();
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m_refData = new wxPaletteRefData();
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M_PALETTEDATA->m_count = n;
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M_PALETTEDATA->m_entries = new wxPaletteEntry[n];
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wxPaletteEntry *e = M_PALETTEDATA->m_entries;
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for (int i = 0; i < n; i++, e++)
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{
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e->red = red[i];
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e->green = green[i];
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e->blue = blue[i];
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}
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return true;
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}
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int wxPalette::GetPixel( unsigned char red,
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unsigned char green,
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unsigned char blue ) const
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{
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if (!m_refData) return wxNOT_FOUND;
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int closest = 0;
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double d,distance = 1000.0; // max. dist is 256
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wxPaletteEntry *e = M_PALETTEDATA->m_entries;
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for (int i = 0; i < M_PALETTEDATA->m_count; i++, e++)
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{
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if ((d = 0.299 * abs(red - e->red) +
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0.587 * abs(green - e->green) +
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0.114 * abs(blue - e->blue)) < distance) {
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distance = d;
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closest = i;
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}
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}
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return closest;
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}
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bool wxPalette::GetRGB(int pixel,
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unsigned char *red,
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unsigned char *green,
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unsigned char *blue) const
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{
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if (!m_refData) return false;
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if (pixel >= M_PALETTEDATA->m_count) return false;
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wxPaletteEntry& p = M_PALETTEDATA->m_entries[pixel];
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if (red) *red = p.red;
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if (green) *green = p.green;
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if (blue) *blue = p.blue;
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return true;
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}
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#endif // wxUSE_PALETTE
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