src/x11/colour.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        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
  13 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  14 #pragma implementation "colour.h"
  15 #endif
  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( unsigned char red, unsigned char green, unsigned char blue )
 145 {
 146     m_refData = new wxColourRefData();
 147 #if wxUSE_NANOX
 148     M_COLDATA->m_color.red = ((unsigned short)red) ;
 149     M_COLDATA->m_color.green = ((unsigned short)green) ;
 150     M_COLDATA->m_color.blue = ((unsigned short)blue) ;
 151 #else
 152     M_COLDATA->m_color.red = ((unsigned short)red) << SHIFT;
 153     M_COLDATA->m_color.green = ((unsigned short)green) << SHIFT;
 154     M_COLDATA->m_color.blue = ((unsigned short)blue) << SHIFT;
 155 #endif
 156     M_COLDATA->m_color.pixel = 0;
 157 }
 158
 159 /* static */
 160 wxColour wxColour::CreateByName(const wxString& name)
 161 {
 162     wxColour col;
 163
 164     Display *dpy = wxGlobalDisplay();
 165     WXColormap colormap = wxTheApp->GetMainColormap( dpy );
 166     XColor xcol;
 167     if ( XParseColor( dpy, (Colormap)colormap, name.mb_str(), &xcol ) )
 168     {
 169         wxColourRefData *refData = new wxColourRefData;
 170         refData->m_colormap = colormap;
 171         refData->m_color = xcol;
 172         col.m_refData = refData;
 173     }
 174
 175     return col;
 176 }
 177
 178 void wxColour::InitFromName( const wxString &colourName )
 179 {
 180     // check the cache first
 181     wxColour col;
 182     if ( wxTheColourDatabase )
 183     {
 184         col = wxTheColourDatabase->Find(colourName);
 185     }
 186
 187     if ( !col.Ok() )
 188     {
 189         col = CreateByName(colourName);
 190     }
 191
 192     if ( col.Ok() )
 193     {
 194         *this = col;
 195     }
 196     else
 197     {
 198         wxFAIL_MSG( wxT("wxColour: couldn't find colour") );
 199     }
 200 }
 201
 202 wxColour::~wxColour()
 203 {
 204 }
 205
 206 bool wxColour::operator == ( const wxColour& col ) const
 207 {
 208     if (m_refData == col.m_refData) return true;
 209
 210     if (!m_refData || !col.m_refData) return false;
 211
 212     XColor *own = &(((wxColourRefData*)m_refData)->m_color);
 213     XColor *other = &(((wxColourRefData*)col.m_refData)->m_color);
 214
 215     return (own->red == other->red)
 216         && (own->green == other->green)
 217         && (own->blue == other->blue) ;
 218
 219 }
 220
 221 wxObjectRefData *wxColour::CreateRefData() const
 222 {
 223     return new wxColourRefData;
 224 }
 225
 226 wxObjectRefData *wxColour::CloneRefData(const wxObjectRefData *data) const
 227 {
 228     return new wxColourRefData(*(wxColourRefData *)data);
 229 }
 230
 231 void wxColour::Set( unsigned char red, unsigned char green, unsigned char blue )
 232 {
 233     AllocExclusive();
 234
 235 #if wxUSE_NANOX
 236     M_COLDATA->m_color.red = ((unsigned short)red) ;
 237     M_COLDATA->m_color.green = ((unsigned short)green) ;
 238     M_COLDATA->m_color.blue = ((unsigned short)blue) ;
 239 #else
 240     M_COLDATA->m_color.red = ((unsigned short)red) << SHIFT;
 241     M_COLDATA->m_color.green = ((unsigned short)green) << SHIFT;
 242     M_COLDATA->m_color.blue = ((unsigned short)blue) << SHIFT;
 243 #endif
 244     M_COLDATA->m_color.pixel = 0;
 245 }
 246
 247 unsigned char wxColour::Red() const
 248 {
 249     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 250
 251 #if wxUSE_NANOX
 252     return (unsigned char) M_COLDATA->m_color.red ;
 253 #else
 254     return (unsigned char)(M_COLDATA->m_color.red >> SHIFT);
 255 #endif
 256 }
 257
 258 unsigned char wxColour::Green() const
 259 {
 260     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 261
 262 #if wxUSE_NANOX
 263     return (unsigned char) M_COLDATA->m_color.green ;
 264 #else
 265     return (unsigned char)(M_COLDATA->m_color.green >> SHIFT);
 266 #endif
 267 }
 268
 269 unsigned char wxColour::Blue() const
 270 {
 271     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 272
 273 #if wxUSE_NANOX
 274     return (unsigned char) M_COLDATA->m_color.blue ;
 275 #else
 276     return (unsigned char)(M_COLDATA->m_color.blue >> SHIFT);
 277 #endif
 278 }
 279
 280 void wxColour::CalcPixel( WXColormap cmap )
 281 {
 282     wxCHECK_RET( Ok(), wxT("invalid colour") );
 283
 284     wxCHECK_RET( cmap, wxT("invalid colormap") );
 285
 286     M_COLDATA->AllocColour( cmap );
 287 }
 288
 289 unsigned long wxColour::GetPixel() const
 290 {
 291     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 292
 293     return M_COLDATA->m_color.pixel;
 294 }
 295
 296 WXColor *wxColour::GetColor() const
 297 {
 298     wxCHECK_MSG( Ok(), (WXColor *) NULL, wxT("invalid colour") );
 299
 300     return (WXColor*) &M_COLDATA->m_color;
 301 }