src/x11/colour.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/x11/colour.cpp
   3 // Purpose:     wxColour class
   4 // Author:      Julian Smart, Robert Roebling
   5 // Modified by:
   6 // Created:     17/09/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart, Robert Roebling
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // For compilers that support precompilation, includes "wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #include "wx/colour.h"
  16
  17 #ifndef WX_PRECOMP
  18     #include "wx/app.h"
  19     #include "wx/gdicmn.h"
  20 #endif
  21
  22 #include "wx/x11/private.h"
  23
  24 //-----------------------------------------------------------------------------
  25 // wxColour
  26 //-----------------------------------------------------------------------------
  27
  28 class wxColourRefData : public wxGDIRefData
  29 {
  30 public:
  31     wxColourRefData()
  32     {
  33         m_color.red = 0;
  34         m_color.green = 0;
  35         m_color.blue = 0;
  36         m_color.pixel = 0;
  37         m_colormap = NULL;
  38         m_hasPixel = false;
  39     }
  40
  41     wxColourRefData(const wxColourRefData& data)
  42     {
  43         m_color = data.m_color;
  44         m_colormap = data.m_colormap;
  45         m_hasPixel = data.m_hasPixel;
  46     }
  47
  48     virtual ~wxColourRefData()
  49     {
  50         FreeColour();
  51     }
  52
  53     bool operator==(const wxColourRefData& data) const
  54     {
  55         return (m_colormap == data.m_colormap &&
  56                 m_hasPixel == data.m_hasPixel &&
  57                 m_color.red == data.m_color.red &&
  58                 m_color.green == data.m_color.green &&
  59                 m_color.blue == data.m_color.blue &&
  60                 m_color.pixel == data.m_color.pixel);
  61     }
  62
  63     void FreeColour();
  64     void AllocColour( WXColormap cmap );
  65
  66     XColor       m_color;
  67     WXColormap   m_colormap;
  68     bool         m_hasPixel;
  69
  70     friend class wxColour;
  71
  72     // reference counter for systems with <= 8-Bit display
  73     static unsigned short colMapAllocCounter[ 256 ];
  74 };
  75
  76 unsigned short wxColourRefData::colMapAllocCounter[ 256 ] =
  77 {
  78   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  79   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  80   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  81   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  82   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  83   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  84   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  85   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  86   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  87   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  88   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  89   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  90   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
  91 };
  92
  93 void wxColourRefData::FreeColour()
  94 {
  95     if (!m_colormap)
  96         return;
  97 #if !wxUSE_NANOX
  98     if ( wxTheApp &&
  99          (wxTheApp->m_visualInfo->m_visualType == GrayScale ||
 100           wxTheApp->m_visualInfo->m_visualType == PseudoColor) )
 101     {
 102         int idx = m_color.pixel;
 103         colMapAllocCounter[ idx ] = colMapAllocCounter[ idx ] - 1;
 104
 105         if (colMapAllocCounter[ idx ] == 0)
 106         {
 107             unsigned long pixel = m_color.pixel;
 108             XFreeColors( wxGlobalDisplay(), (Colormap) m_colormap, &pixel, 1, 0 );
 109         }
 110     }
 111 #endif
 112 }
 113
 114 void wxColourRefData::AllocColour( WXColormap cmap )
 115 {
 116     if (m_hasPixel && (m_colormap == cmap))
 117         return;
 118
 119     FreeColour();
 120
 121 #if !wxUSE_NANOX
 122     if ((wxTheApp->m_visualInfo->m_visualType == GrayScale) ||
 123         (wxTheApp->m_visualInfo->m_visualType == PseudoColor))
 124     {
 125         m_hasPixel = XAllocColor( wxGlobalDisplay(), (Colormap) cmap, &m_color );
 126         int idx = m_color.pixel;
 127         colMapAllocCounter[ idx ] = colMapAllocCounter[ idx ] + 1;
 128     }
 129     else
 130 #endif
 131     {
 132         m_hasPixel = XAllocColor( wxGlobalDisplay(), (Colormap) cmap, &m_color );
 133     }
 134
 135     m_colormap = cmap;
 136 }
 137
 138 //-----------------------------------------------------------------------------
 139
 140 #define M_COLDATA ((wxColourRefData *)m_refData)
 141
 142 #define SHIFT (8*(sizeof(short int)-sizeof(char)))
 143
 144 wxColour::~wxColour()
 145 {
 146 }
 147
 148 bool wxColour::operator == ( const wxColour& col ) const
 149 {
 150     if (m_refData == col.m_refData) return true;
 151
 152     if (!m_refData || !col.m_refData) return false;
 153
 154     XColor *own = &(((wxColourRefData*)m_refData)->m_color);
 155     XColor *other = &(((wxColourRefData*)col.m_refData)->m_color);
 156
 157     return (own->red == other->red)
 158         && (own->green == other->green)
 159         && (own->blue == other->blue) ;
 160
 161 }
 162
 163 wxGDIRefData *wxColour::CreateGDIRefData() const
 164 {
 165     return new wxColourRefData;
 166 }
 167
 168 wxGDIRefData *wxColour::CloneGDIRefData(const wxGDIRefData *data) const
 169 {
 170     return new wxColourRefData(*(wxColourRefData *)data);
 171 }
 172
 173 void wxColour::InitRGBA(unsigned char red, unsigned char green, unsigned char blue,
 174                         unsigned char WXUNUSED(alpha))
 175 {
 176     AllocExclusive();
 177
 178 #if wxUSE_NANOX
 179     M_COLDATA->m_color.red = ((unsigned short)red) ;
 180     M_COLDATA->m_color.green = ((unsigned short)green) ;
 181     M_COLDATA->m_color.blue = ((unsigned short)blue) ;
 182 #else
 183     M_COLDATA->m_color.red = ((unsigned short)red) << SHIFT;
 184     M_COLDATA->m_color.green = ((unsigned short)green) << SHIFT;
 185     M_COLDATA->m_color.blue = ((unsigned short)blue) << SHIFT;
 186 #endif
 187     M_COLDATA->m_color.pixel = 0;
 188 }
 189
 190 unsigned char wxColour::Red() const
 191 {
 192     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 193
 194 #if wxUSE_NANOX
 195     return (unsigned char) M_COLDATA->m_color.red ;
 196 #else
 197     return (unsigned char)(M_COLDATA->m_color.red >> SHIFT);
 198 #endif
 199 }
 200
 201 unsigned char wxColour::Green() const
 202 {
 203     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 204
 205 #if wxUSE_NANOX
 206     return (unsigned char) M_COLDATA->m_color.green ;
 207 #else
 208     return (unsigned char)(M_COLDATA->m_color.green >> SHIFT);
 209 #endif
 210 }
 211
 212 unsigned char wxColour::Blue() const
 213 {
 214     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 215
 216 #if wxUSE_NANOX
 217     return (unsigned char) M_COLDATA->m_color.blue ;
 218 #else
 219     return (unsigned char)(M_COLDATA->m_color.blue >> SHIFT);
 220 #endif
 221 }
 222
 223 void wxColour::CalcPixel( WXColormap cmap )
 224 {
 225     wxCHECK_RET( Ok(), wxT("invalid colour") );
 226
 227     wxCHECK_RET( cmap, wxT("invalid colormap") );
 228
 229     M_COLDATA->AllocColour( cmap );
 230 }
 231
 232 unsigned long wxColour::GetPixel() const
 233 {
 234     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 235
 236     return M_COLDATA->m_color.pixel;
 237 }
 238
 239 WXColor *wxColour::GetColor() const
 240 {
 241     wxCHECK_MSG( Ok(), NULL, wxT("invalid colour") );
 242
 243     return (WXColor*) &M_COLDATA->m_color;
 244 }
 245
 246 bool wxColour::FromString(const wxString& name)
 247 {
 248     Display *dpy = wxGlobalDisplay();
 249     WXColormap colormap = wxTheApp->GetMainColormap( dpy );
 250     XColor xcol;
 251     if ( XParseColor( dpy, (Colormap)colormap, name.mbc_str(), &xcol ) )
 252     {
 253         UnRef();
 254
 255         m_refData = new wxColourRefData;
 256         M_COLDATA->m_colormap = colormap;
 257         M_COLDATA->m_color = xcol;
 258         return true;
 259     }
 260
 261     return wxColourBase::FromString(name);
 262 }