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