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