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 and Markus Holzem
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  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 #ifndef WX_PRECOMP
  24 #include <stdio.h>
  25 #include "wx/setup.h"
  26 #include "wx/palette.h"
  27 #endif
  28
  29 #include <windows.h>
  30
  31 #include "assert.h"
  32
  33 #if !USE_SHARED_LIBRARIES
  34 IMPLEMENT_DYNAMIC_CLASS(wxPalette, wxGDIObject)
  35 #endif
  36
  37 /*
  38  * Palette
  39  *
  40  */
  41
  42 wxPaletteRefData::wxPaletteRefData(void)
  43 {
  44   m_hPalette = 0;
  45 }
  46
  47 wxPaletteRefData::~wxPaletteRefData(void)
  48 {
  49         if ( m_hPalette )
  50                 ::DeleteObject((HPALETTE) m_hPalette);
  51 }
  52
  53 wxPalette::wxPalette(void)
  54 {
  55 }
  56
  57 wxPalette::wxPalette(int n, const unsigned char *red, const unsigned char *green, const unsigned char *blue)
  58 {
  59   Create(n, red, green, blue);
  60 }
  61
  62 wxPalette::~wxPalette(void)
  63 {
  64 //      FreeResource(TRUE);
  65 }
  66
  67 bool wxPalette::FreeResource(bool force)
  68 {
  69         if ( M_PALETTEDATA && M_PALETTEDATA->m_hPalette)
  70         {
  71       DeleteObject((HPALETTE)M_PALETTEDATA->m_hPalette);
  72         }
  73         return TRUE;
  74 }
  75
  76 bool wxPalette::Create(int n, const unsigned char *red, const unsigned char *green, const unsigned char *blue)
  77 {
  78   UnRef();
  79
  80 #ifdef __WXWINE__
  81
  82   return (FALSE);
  83
  84 #else
  85
  86   m_refData = new wxPaletteRefData;
  87
  88   NPLOGPALETTE npPal = (NPLOGPALETTE)LocalAlloc(LMEM_FIXED, sizeof(LOGPALETTE) +
  89                         (WORD)n * sizeof(PALETTEENTRY));
  90   if (!npPal)
  91     return(FALSE);
  92
  93   npPal->palVersion = 0x300;
  94   npPal->palNumEntries = n;
  95
  96   int i;
  97   for (i = 0; i < n; i ++)
  98   {
  99     npPal->palPalEntry[i].peRed = red[i];
 100     npPal->palPalEntry[i].peGreen = green[i];
 101     npPal->palPalEntry[i].peBlue = blue[i];
 102     npPal->palPalEntry[i].peFlags = 0;
 103   }
 104   M_PALETTEDATA->m_hPalette = (WXHPALETTE) CreatePalette((LPLOGPALETTE)npPal);
 105   LocalFree((HANDLE)npPal);
 106   return TRUE;
 107
 108 #endif
 109 }
 110
 111 int wxPalette::GetPixel(const unsigned char red, const unsigned char green, const unsigned char blue) const
 112 {
 113   if ( !m_refData )
 114         return FALSE;
 115
 116   return ::GetNearestPaletteIndex((HPALETTE) M_PALETTEDATA->m_hPalette, PALETTERGB(red, green, blue));
 117 }
 118
 119 bool wxPalette::GetRGB(int index, unsigned char *red, unsigned char *green, unsigned char *blue) const
 120 {
 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   } else
 135          return FALSE;
 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