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(void)
  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     return true;
  67 }
  68
  69 bool wxPalette::Create(int n, const unsigned char *red, const unsigned char *green, const unsigned char *blue)
  70 {
  71     UnRef();
  72
  73 #if defined(__WXMICROWIN__)
  74
  75     return false;
  76
  77 #else
  78
  79     m_refData = new wxPaletteRefData;
  80
  81     NPLOGPALETTE npPal = (NPLOGPALETTE)LocalAlloc(LMEM_FIXED, sizeof(LOGPALETTE) +
  82                           (WORD)n * sizeof(PALETTEENTRY));
  83     if (!npPal)
  84         return false;
  85
  86     npPal->palVersion = 0x300;
  87     npPal->palNumEntries = (WORD)n;
  88
  89     int i;
  90     for (i = 0; i < n; i ++)
  91     {
  92         npPal->palPalEntry[i].peRed = red[i];
  93         npPal->palPalEntry[i].peGreen = green[i];
  94         npPal->palPalEntry[i].peBlue = blue[i];
  95         npPal->palPalEntry[i].peFlags = 0;
  96     }
  97     M_PALETTEDATA->m_hPalette = (WXHPALETTE) CreatePalette((LPLOGPALETTE)npPal);
  98     LocalFree((HANDLE)npPal);
  99     return true;
 100
 101 #endif
 102 }
 103
 104 int wxPalette::GetPixel(unsigned char red, unsigned char green, unsigned char blue) const
 105 {
 106 #ifdef __WXMICROWIN__
 107     return wxNOT_FOUND;
 108 #else
 109     if ( !m_refData )
 110         return wxNOT_FOUND;
 111
 112     return ::GetNearestPaletteIndex((HPALETTE) M_PALETTEDATA->m_hPalette, PALETTERGB(red, green, blue));
 113 #endif
 114 }
 115
 116 bool wxPalette::GetRGB(int index, unsigned char *red, unsigned char *green, unsigned char *blue) const
 117 {
 118 #ifdef __WXMICROWIN__
 119     return false;
 120 #else
 121     if ( !m_refData )
 122         return false;
 123
 124     if (index < 0 || index > 255)
 125         return false;
 126
 127     PALETTEENTRY entry;
 128     if (::GetPaletteEntries((HPALETTE) M_PALETTEDATA->m_hPalette, index, 1, &entry))
 129     {
 130         *red = entry.peRed;
 131         *green = entry.peGreen;
 132         *blue = entry.peBlue;
 133         return true;
 134     }
 135     else
 136         return false;
 137 #endif
 138 }
 139
 140 void wxPalette::SetHPALETTE(WXHPALETTE pal)
 141 {
 142     if ( !m_refData )
 143         m_refData = new wxPaletteRefData;
 144
 145     M_PALETTEDATA->m_hPalette = pal;
 146 }
 147
 148 #endif // wxUSE_PALETTE