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 #include "wx/gdicmn.h"
  13 #include "wx/app.h"
  14
  15 #include "wx/x11/private.h"
  16
  17 //-----------------------------------------------------------------------------
  18 // wxColour
  19 //-----------------------------------------------------------------------------
  20
  21 class wxColourRefData: public wxObjectRefData
  22 {
  23 public:
  24     wxColourRefData()
  25     {
  26         m_color.red = 0;
  27         m_color.green = 0;
  28         m_color.blue = 0;
  29         m_color.pixel = 0;
  30         m_colormap = (WXColormap *) NULL;
  31         m_hasPixel = false;
  32     }
  33     wxColourRefData(const wxColourRefData& data):
  34         wxObjectRefData()
  35     {
  36         m_color = data.m_color;
  37         m_colormap = data.m_colormap;
  38         m_hasPixel = data.m_hasPixel;
  39     }
  40
  41     ~wxColourRefData()
  42     {
  43         FreeColour();
  44     }
  45
  46     bool operator == (const wxColourRefData& data) const
  47     {
  48         return (m_colormap == data.m_colormap &&
  49                 m_hasPixel == data.m_hasPixel &&
  50                 m_color.red == data.m_color.red &&
  51                 m_color.green == data.m_color.green &&
  52                 m_color.blue == data.m_color.blue &&
  53                 m_color.pixel == data.m_color.pixel);
  54     }
  55
  56     void FreeColour();
  57     void AllocColour( WXColormap cmap );
  58
  59     XColor       m_color;
  60     WXColormap   m_colormap;
  61     bool         m_hasPixel;
  62
  63     friend class wxColour;
  64
  65     // reference counter for systems with <= 8-Bit display
  66     static unsigned short colMapAllocCounter[ 256 ];
  67 };
  68
  69 unsigned short wxColourRefData::colMapAllocCounter[ 256 ] =
  70 {
  71   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  72   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  73   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  74   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  75   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  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
  84 };
  85
  86 void wxColourRefData::FreeColour()
  87 {
  88     if (!m_colormap)
  89         return;
  90 #if !wxUSE_NANOX
  91     if ( wxTheApp &&
  92          (wxTheApp->m_visualInfo->m_visualType == GrayScale ||
  93           wxTheApp->m_visualInfo->m_visualType == PseudoColor) )
  94     {
  95         int idx = m_color.pixel;
  96         colMapAllocCounter[ idx ] = colMapAllocCounter[ idx ] - 1;
  97
  98         if (colMapAllocCounter[ idx ] == 0)
  99         {
 100             unsigned long pixel = m_color.pixel;
 101             XFreeColors( wxGlobalDisplay(), (Colormap) m_colormap, &pixel, 1, 0 );
 102         }
 103     }
 104 #endif
 105 }
 106
 107 void wxColourRefData::AllocColour( WXColormap cmap )
 108 {
 109     if (m_hasPixel && (m_colormap == cmap))
 110         return;
 111
 112     FreeColour();
 113
 114 #if !wxUSE_NANOX
 115     if ((wxTheApp->m_visualInfo->m_visualType == GrayScale) ||
 116         (wxTheApp->m_visualInfo->m_visualType == PseudoColor))
 117     {
 118         m_hasPixel = XAllocColor( wxGlobalDisplay(), (Colormap) cmap, &m_color );
 119         int idx = m_color.pixel;
 120         colMapAllocCounter[ idx ] = colMapAllocCounter[ idx ] + 1;
 121     }
 122     else
 123 #endif
 124     {
 125         m_hasPixel = XAllocColor( wxGlobalDisplay(), (Colormap) cmap, &m_color );
 126     }
 127
 128     m_colormap = cmap;
 129 }
 130
 131 //-----------------------------------------------------------------------------
 132
 133 #define M_COLDATA ((wxColourRefData *)m_refData)
 134
 135 #define SHIFT (8*(sizeof(short int)-sizeof(char)))
 136
 137 IMPLEMENT_DYNAMIC_CLASS(wxColour,wxGDIObject)
 138
 139 wxColour::wxColour( unsigned char red, unsigned char green, unsigned char blue )
 140 {
 141     m_refData = new wxColourRefData();
 142 #if wxUSE_NANOX
 143     M_COLDATA->m_color.red = ((unsigned short)red) ;
 144     M_COLDATA->m_color.green = ((unsigned short)green) ;
 145     M_COLDATA->m_color.blue = ((unsigned short)blue) ;
 146 #else
 147     M_COLDATA->m_color.red = ((unsigned short)red) << SHIFT;
 148     M_COLDATA->m_color.green = ((unsigned short)green) << SHIFT;
 149     M_COLDATA->m_color.blue = ((unsigned short)blue) << SHIFT;
 150 #endif
 151     M_COLDATA->m_color.pixel = 0;
 152 }
 153
 154 /* static */
 155 wxColour wxColour::CreateByName(const wxString& name)
 156 {
 157     wxColour col;
 158
 159     Display *dpy = wxGlobalDisplay();
 160     WXColormap colormap = wxTheApp->GetMainColormap( dpy );
 161     XColor xcol;
 162     if ( XParseColor( dpy, (Colormap)colormap, name.mb_str(), &xcol ) )
 163     {
 164         wxColourRefData *refData = new wxColourRefData;
 165         refData->m_colormap = colormap;
 166         refData->m_color = xcol;
 167         col.m_refData = refData;
 168     }
 169
 170     return col;
 171 }
 172
 173 void wxColour::InitFromName( const wxString &colourName )
 174 {
 175     // check the cache first
 176     wxColour col;
 177     if ( wxTheColourDatabase )
 178     {
 179         col = wxTheColourDatabase->Find(colourName);
 180     }
 181
 182     if ( !col.Ok() )
 183     {
 184         col = CreateByName(colourName);
 185     }
 186
 187     if ( col.Ok() )
 188     {
 189         *this = col;
 190     }
 191     else
 192     {
 193         wxFAIL_MSG( wxT("wxColour: couldn't find colour") );
 194     }
 195 }
 196
 197 wxColour::~wxColour()
 198 {
 199 }
 200
 201 bool wxColour::operator == ( const wxColour& col ) const
 202 {
 203     if (m_refData == col.m_refData) return true;
 204
 205     if (!m_refData || !col.m_refData) return false;
 206
 207     XColor *own = &(((wxColourRefData*)m_refData)->m_color);
 208     XColor *other = &(((wxColourRefData*)col.m_refData)->m_color);
 209
 210     return (own->red == other->red)
 211         && (own->green == other->green)
 212         && (own->blue == other->blue) ;
 213
 214 }
 215
 216 wxObjectRefData *wxColour::CreateRefData() const
 217 {
 218     return new wxColourRefData;
 219 }
 220
 221 wxObjectRefData *wxColour::CloneRefData(const wxObjectRefData *data) const
 222 {
 223     return new wxColourRefData(*(wxColourRefData *)data);
 224 }
 225
 226 void wxColour::Set( unsigned char red, unsigned char green, unsigned char blue )
 227 {
 228     AllocExclusive();
 229
 230 #if wxUSE_NANOX
 231     M_COLDATA->m_color.red = ((unsigned short)red) ;
 232     M_COLDATA->m_color.green = ((unsigned short)green) ;
 233     M_COLDATA->m_color.blue = ((unsigned short)blue) ;
 234 #else
 235     M_COLDATA->m_color.red = ((unsigned short)red) << SHIFT;
 236     M_COLDATA->m_color.green = ((unsigned short)green) << SHIFT;
 237     M_COLDATA->m_color.blue = ((unsigned short)blue) << SHIFT;
 238 #endif
 239     M_COLDATA->m_color.pixel = 0;
 240 }
 241
 242 unsigned char wxColour::Red() const
 243 {
 244     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 245
 246 #if wxUSE_NANOX
 247     return (unsigned char) M_COLDATA->m_color.red ;
 248 #else
 249     return (unsigned char)(M_COLDATA->m_color.red >> SHIFT);
 250 #endif
 251 }
 252
 253 unsigned char wxColour::Green() const
 254 {
 255     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 256
 257 #if wxUSE_NANOX
 258     return (unsigned char) M_COLDATA->m_color.green ;
 259 #else
 260     return (unsigned char)(M_COLDATA->m_color.green >> SHIFT);
 261 #endif
 262 }
 263
 264 unsigned char wxColour::Blue() const
 265 {
 266     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 267
 268 #if wxUSE_NANOX
 269     return (unsigned char) M_COLDATA->m_color.blue ;
 270 #else
 271     return (unsigned char)(M_COLDATA->m_color.blue >> SHIFT);
 272 #endif
 273 }
 274
 275 void wxColour::CalcPixel( WXColormap cmap )
 276 {
 277     wxCHECK_RET( Ok(), wxT("invalid colour") );
 278
 279     wxCHECK_RET( cmap, wxT("invalid colormap") );
 280
 281     M_COLDATA->AllocColour( cmap );
 282 }
 283
 284 unsigned long wxColour::GetPixel() const
 285 {
 286     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 287
 288     return M_COLDATA->m_color.pixel;
 289 }
 290
 291 WXColor *wxColour::GetColor() const
 292 {
 293     wxCHECK_MSG( Ok(), (WXColor *) NULL, wxT("invalid colour") );
 294
 295     return (WXColor*) &M_COLDATA->m_color;
 296 }