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 #include "wx/gdicmn.h"
  18 #include "wx/app.h"
  19
  20 #include "wx/x11/private.h"
  21
  22 //-----------------------------------------------------------------------------
  23 // wxColour
  24 //-----------------------------------------------------------------------------
  25
  26 class wxColourRefData: public wxObjectRefData
  27 {
  28 public:
  29     wxColourRefData()
  30     {
  31         m_color.red = 0;
  32         m_color.green = 0;
  33         m_color.blue = 0;
  34         m_color.pixel = 0;
  35         m_colormap = (WXColormap *) NULL;
  36         m_hasPixel = false;
  37     }
  38     wxColourRefData(const wxColourRefData& data):
  39         wxObjectRefData()
  40     {
  41         m_color = data.m_color;
  42         m_colormap = data.m_colormap;
  43         m_hasPixel = data.m_hasPixel;
  44     }
  45
  46     ~wxColourRefData()
  47     {
  48         FreeColour();
  49     }
  50
  51     bool operator == (const wxColourRefData& data) const
  52     {
  53         return (m_colormap == data.m_colormap &&
  54                 m_hasPixel == data.m_hasPixel &&
  55                 m_color.red == data.m_color.red &&
  56                 m_color.green == data.m_color.green &&
  57                 m_color.blue == data.m_color.blue &&
  58                 m_color.pixel == data.m_color.pixel);
  59     }
  60
  61     void FreeColour();
  62     void AllocColour( WXColormap cmap );
  63
  64     XColor       m_color;
  65     WXColormap   m_colormap;
  66     bool         m_hasPixel;
  67
  68     friend class wxColour;
  69
  70     // reference counter for systems with <= 8-Bit display
  71     static unsigned short colMapAllocCounter[ 256 ];
  72 };
  73
  74 unsigned short wxColourRefData::colMapAllocCounter[ 256 ] =
  75 {
  76   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  77   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  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
  89 };
  90
  91 void wxColourRefData::FreeColour()
  92 {
  93     if (!m_colormap)
  94         return;
  95 #if !wxUSE_NANOX
  96     if ( wxTheApp &&
  97          (wxTheApp->m_visualInfo->m_visualType == GrayScale ||
  98           wxTheApp->m_visualInfo->m_visualType == PseudoColor) )
  99     {
 100         int idx = m_color.pixel;
 101         colMapAllocCounter[ idx ] = colMapAllocCounter[ idx ] - 1;
 102
 103         if (colMapAllocCounter[ idx ] == 0)
 104         {
 105             unsigned long pixel = m_color.pixel;
 106             XFreeColors( wxGlobalDisplay(), (Colormap) m_colormap, &pixel, 1, 0 );
 107         }
 108     }
 109 #endif
 110 }
 111
 112 void wxColourRefData::AllocColour( WXColormap cmap )
 113 {
 114     if (m_hasPixel && (m_colormap == cmap))
 115         return;
 116
 117     FreeColour();
 118
 119 #if !wxUSE_NANOX
 120     if ((wxTheApp->m_visualInfo->m_visualType == GrayScale) ||
 121         (wxTheApp->m_visualInfo->m_visualType == PseudoColor))
 122     {
 123         m_hasPixel = XAllocColor( wxGlobalDisplay(), (Colormap) cmap, &m_color );
 124         int idx = m_color.pixel;
 125         colMapAllocCounter[ idx ] = colMapAllocCounter[ idx ] + 1;
 126     }
 127     else
 128 #endif
 129     {
 130         m_hasPixel = XAllocColor( wxGlobalDisplay(), (Colormap) cmap, &m_color );
 131     }
 132
 133     m_colormap = cmap;
 134 }
 135
 136 //-----------------------------------------------------------------------------
 137
 138 #define M_COLDATA ((wxColourRefData *)m_refData)
 139
 140 #define SHIFT (8*(sizeof(short int)-sizeof(char)))
 141
 142 IMPLEMENT_DYNAMIC_CLASS(wxColour,wxGDIObject)
 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 wxObjectRefData *wxColour::CreateRefData() const
 164 {
 165     return new wxColourRefData;
 166 }
 167
 168 wxObjectRefData *wxColour::CloneRefData(const wxObjectRefData *data) const
 169 {
 170     return new wxColourRefData(*(wxColourRefData *)data);
 171 }
 172
 173 void wxColour::InitWith( unsigned char red, unsigned char green, unsigned char blue )
 174 {
 175     AllocExclusive();
 176
 177 #if wxUSE_NANOX
 178     M_COLDATA->m_color.red = ((unsigned short)red) ;
 179     M_COLDATA->m_color.green = ((unsigned short)green) ;
 180     M_COLDATA->m_color.blue = ((unsigned short)blue) ;
 181 #else
 182     M_COLDATA->m_color.red = ((unsigned short)red) << SHIFT;
 183     M_COLDATA->m_color.green = ((unsigned short)green) << SHIFT;
 184     M_COLDATA->m_color.blue = ((unsigned short)blue) << SHIFT;
 185 #endif
 186     M_COLDATA->m_color.pixel = 0;
 187 }
 188
 189 unsigned char wxColour::Red() const
 190 {
 191     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 192
 193 #if wxUSE_NANOX
 194     return (unsigned char) M_COLDATA->m_color.red ;
 195 #else
 196     return (unsigned char)(M_COLDATA->m_color.red >> SHIFT);
 197 #endif
 198 }
 199
 200 unsigned char wxColour::Green() const
 201 {
 202     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 203
 204 #if wxUSE_NANOX
 205     return (unsigned char) M_COLDATA->m_color.green ;
 206 #else
 207     return (unsigned char)(M_COLDATA->m_color.green >> SHIFT);
 208 #endif
 209 }
 210
 211 unsigned char wxColour::Blue() const
 212 {
 213     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 214
 215 #if wxUSE_NANOX
 216     return (unsigned char) M_COLDATA->m_color.blue ;
 217 #else
 218     return (unsigned char)(M_COLDATA->m_color.blue >> SHIFT);
 219 #endif
 220 }
 221
 222 void wxColour::CalcPixel( WXColormap cmap )
 223 {
 224     wxCHECK_RET( Ok(), wxT("invalid colour") );
 225
 226     wxCHECK_RET( cmap, wxT("invalid colormap") );
 227
 228     M_COLDATA->AllocColour( cmap );
 229 }
 230
 231 unsigned long wxColour::GetPixel() const
 232 {
 233     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 234
 235     return M_COLDATA->m_color.pixel;
 236 }
 237
 238 WXColor *wxColour::GetColor() const
 239 {
 240     wxCHECK_MSG( Ok(), (WXColor *) NULL, wxT("invalid colour") );
 241
 242     return (WXColor*) &M_COLDATA->m_color;
 243 }
 244
 245 bool wxColour::FromString(const wxChar *name)
 246 {
 247     Display *dpy = wxGlobalDisplay();
 248     WXColormap colormap = wxTheApp->GetMainColormap( dpy );
 249     XColor xcol;
 250     if ( XParseColor( dpy, (Colormap)colormap, name , &xcol ) )
 251     {
 252         UnRef();
 253
 254         m_refData = new wxColourRefData;
 255         M_COLDATA->m_colormap = colormap;
 256         M_COLDATA->m_color = xcol;
 257         return true;
 258     }
 259
 260     return wxColourBase::FromString(name);
 261 }