src/msw/palette.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        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 #ifndef WX_PRECOMP
  22     #include "wx/palette.h"
  23 #endif
  24
  25 #include "wx/msw/private.h"
  26
  27 IMPLEMENT_DYNAMIC_CLASS(wxPalette, wxGDIObject)
  28
  29 /*
  30  * Palette
  31  *
  32  */
  33
  34 wxPaletteRefData::wxPaletteRefData(void)
  35 {
  36   m_hPalette = 0;
  37 }
  38
  39 wxPaletteRefData::~wxPaletteRefData(void)
  40 {
  41     if ( m_hPalette )
  42         ::DeleteObject((HPALETTE) m_hPalette);
  43 }
  44
  45 wxPalette::wxPalette(void)
  46 {
  47 }
  48
  49 wxPalette::wxPalette(int n, const unsigned char *red, const unsigned char *green, const unsigned char *blue)
  50 {
  51   Create(n, red, green, blue);
  52 }
  53
  54 wxPalette::~wxPalette(void)
  55 {
  56 //    FreeResource(true);
  57 }
  58
  59 bool wxPalette::FreeResource(bool WXUNUSED(force))
  60 {
  61     if ( M_PALETTEDATA && M_PALETTEDATA->m_hPalette)
  62     {
  63       DeleteObject((HPALETTE)M_PALETTEDATA->m_hPalette);
  64     }
  65     return true;
  66 }
  67
  68 bool wxPalette::Create(int n, const unsigned char *red, const unsigned char *green, const unsigned char *blue)
  69 {
  70   UnRef();
  71
  72 #if defined(__WXMICROWIN__)
  73
  74   return false;
  75
  76 #else
  77
  78   m_refData = new wxPaletteRefData;
  79
  80   NPLOGPALETTE npPal = (NPLOGPALETTE)LocalAlloc(LMEM_FIXED, sizeof(LOGPALETTE) +
  81                         (WORD)n * sizeof(PALETTEENTRY));
  82   if (!npPal)
  83     return false;
  84
  85   npPal->palVersion = 0x300;
  86   npPal->palNumEntries = (WORD)n;
  87
  88   int i;
  89   for (i = 0; i < n; i ++)
  90   {
  91     npPal->palPalEntry[i].peRed = red[i];
  92     npPal->palPalEntry[i].peGreen = green[i];
  93     npPal->palPalEntry[i].peBlue = blue[i];
  94     npPal->palPalEntry[i].peFlags = 0;
  95   }
  96   M_PALETTEDATA->m_hPalette = (WXHPALETTE) CreatePalette((LPLOGPALETTE)npPal);
  97   LocalFree((HANDLE)npPal);
  98   return true;
  99
 100 #endif
 101 }
 102
 103 int wxPalette::GetPixel(const unsigned char red, const unsigned char green, const unsigned char blue) const
 104 {
 105 #ifdef __WXMICROWIN__
 106   return 0;
 107 #else
 108   if ( !m_refData )
 109     return 0;
 110
 111   return ::GetNearestPaletteIndex((HPALETTE) M_PALETTEDATA->m_hPalette, PALETTERGB(red, green, blue));
 112 #endif
 113 }
 114
 115 bool wxPalette::GetRGB(int index, unsigned char *red, unsigned char *green, unsigned char *blue) const
 116 {
 117 #ifdef __WXMICROWIN__
 118   return false;
 119 #else
 120   if ( !m_refData )
 121     return false;
 122
 123   if (index < 0 || index > 255)
 124          return false;
 125
 126   PALETTEENTRY entry;
 127   if (::GetPaletteEntries((HPALETTE) M_PALETTEDATA->m_hPalette, index, 1, &entry))
 128   {
 129          *red = entry.peRed;
 130          *green = entry.peGreen;
 131          *blue = entry.peBlue;
 132          return true;
 133   } else
 134          return false;
 135 #endif
 136 }
 137
 138 void wxPalette::SetHPALETTE(WXHPALETTE pal)
 139 {
 140     if ( !m_refData )
 141         m_refData = new wxPaletteRefData;
 142
 143     M_PALETTEDATA->m_hPalette = pal;
 144 }
 145
 146 #endif // wxUSE_PALETTE
 147