src/msw/palette.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/msw/palette.cpp
   3 // Purpose:     wxPalette
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // For compilers that support precompilation, includes "wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #ifdef __BORLANDC__
  16     #pragma hdrstop
  17 #endif
  18
  19 #if wxUSE_PALETTE
  20
  21 #include "wx/palette.h"
  22
  23 #ifndef WX_PRECOMP
  24 #endif
  25
  26 #include "wx/msw/private.h"
  27
  28 IMPLEMENT_DYNAMIC_CLASS(wxPalette, wxGDIObject)
  29
  30 /*
  31  * Palette
  32  *
  33  */
  34
  35 wxPaletteRefData::wxPaletteRefData(void)
  36 {
  37     m_hPalette = 0;
  38 }
  39
  40 wxPaletteRefData::~wxPaletteRefData(void)
  41 {
  42     if ( m_hPalette )
  43         ::DeleteObject((HPALETTE) m_hPalette);
  44 }
  45
  46 wxPalette::wxPalette()
  47 {
  48 }
  49
  50 wxPalette::wxPalette(int n, const unsigned char *red, const unsigned char *green, const unsigned char *blue)
  51 {
  52     Create(n, red, green, blue);
  53 }
  54
  55 wxPalette::~wxPalette(void)
  56 {
  57 //    FreeResource(true);
  58 }
  59
  60 bool wxPalette::FreeResource(bool WXUNUSED(force))
  61 {
  62     if ( M_PALETTEDATA && M_PALETTEDATA->m_hPalette)
  63     {
  64         DeleteObject((HPALETTE)M_PALETTEDATA->m_hPalette);
  65     }
  66
  67     return true;
  68 }
  69
  70 int wxPalette::GetColoursCount() const
  71 {
  72     if ( M_PALETTEDATA && M_PALETTEDATA->m_hPalette)
  73     {
  74         return ::GetPaletteEntries((HPALETTE) M_PALETTEDATA->m_hPalette, 0, 0, NULL );
  75     }
  76
  77     return 0;
  78 }
  79
  80 bool wxPalette::Create(int n, const unsigned char *red, const unsigned char *green, const unsigned char *blue)
  81 {
  82     UnRef();
  83
  84 #if defined(__WXMICROWIN__)
  85
  86     return false;
  87
  88 #else
  89
  90     m_refData = new wxPaletteRefData;
  91
  92     NPLOGPALETTE npPal = (NPLOGPALETTE)LocalAlloc(LMEM_FIXED, sizeof(LOGPALETTE) +
  93                           (WORD)n * sizeof(PALETTEENTRY));
  94     if (!npPal)
  95         return false;
  96
  97     npPal->palVersion = 0x300;
  98     npPal->palNumEntries = (WORD)n;
  99
 100     int i;
 101     for (i = 0; i < n; i ++)
 102     {
 103         npPal->palPalEntry[i].peRed = red[i];
 104         npPal->palPalEntry[i].peGreen = green[i];
 105         npPal->palPalEntry[i].peBlue = blue[i];
 106         npPal->palPalEntry[i].peFlags = 0;
 107     }
 108     M_PALETTEDATA->m_hPalette = (WXHPALETTE) CreatePalette((LPLOGPALETTE)npPal);
 109     LocalFree((HANDLE)npPal);
 110     return true;
 111
 112 #endif
 113 }
 114
 115 int wxPalette::GetPixel(unsigned char red, unsigned char green, unsigned char blue) const
 116 {
 117 #ifdef __WXMICROWIN__
 118     return wxNOT_FOUND;
 119 #else
 120     if ( !m_refData )
 121         return wxNOT_FOUND;
 122
 123     return ::GetNearestPaletteIndex((HPALETTE) M_PALETTEDATA->m_hPalette, PALETTERGB(red, green, blue));
 124 #endif
 125 }
 126
 127 bool wxPalette::GetRGB(int index, unsigned char *red, unsigned char *green, unsigned char *blue) const
 128 {
 129 #ifdef __WXMICROWIN__
 130     return false;
 131 #else
 132     if ( !m_refData )
 133         return false;
 134
 135     if (index < 0 || index > 255)
 136         return false;
 137
 138     PALETTEENTRY entry;
 139     if (::GetPaletteEntries((HPALETTE) M_PALETTEDATA->m_hPalette, index, 1, &entry))
 140     {
 141         *red = entry.peRed;
 142         *green = entry.peGreen;
 143         *blue = entry.peBlue;
 144         return true;
 145     }
 146     else
 147         return false;
 148 #endif
 149 }
 150
 151 void wxPalette::SetHPALETTE(WXHPALETTE pal)
 152 {
 153     if ( !m_refData )
 154         m_refData = new wxPaletteRefData;
 155
 156     M_PALETTEDATA->m_hPalette = pal;
 157 }
 158
 159 #endif // wxUSE_PALETTE