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 = (WXColormap *) 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 IMPLEMENT_DYNAMIC_CLASS(wxColour,wxGDIObject)
 145
 146 wxColour::~wxColour()
 147 {
 148 }
 149
 150 bool wxColour::operator == ( const wxColour& col ) const
 151 {
 152     if (m_refData == col.m_refData) return true;
 153
 154     if (!m_refData || !col.m_refData) return false;
 155
 156     XColor *own = &(((wxColourRefData*)m_refData)->m_color);
 157     XColor *other = &(((wxColourRefData*)col.m_refData)->m_color);
 158
 159     return (own->red == other->red)
 160         && (own->green == other->green)
 161         && (own->blue == other->blue) ;
 162
 163 }
 164
 165 wxGDIRefData *wxColour::CreateGDIRefData() const
 166 {
 167     return new wxColourRefData;
 168 }
 169
 170 wxGDIRefData *wxColour::CloneGDIRefData(const wxGDIRefData *data) const
 171 {
 172     return new wxColourRefData(*(wxColourRefData *)data);
 173 }
 174
 175 void wxColour::InitRGBA(unsigned char red, unsigned char green, unsigned char blue,
 176                         unsigned char WXUNUSED(alpha))
 177 {
 178     AllocExclusive();
 179
 180 #if wxUSE_NANOX
 181     M_COLDATA->m_color.red = ((unsigned short)red) ;
 182     M_COLDATA->m_color.green = ((unsigned short)green) ;
 183     M_COLDATA->m_color.blue = ((unsigned short)blue) ;
 184 #else
 185     M_COLDATA->m_color.red = ((unsigned short)red) << SHIFT;
 186     M_COLDATA->m_color.green = ((unsigned short)green) << SHIFT;
 187     M_COLDATA->m_color.blue = ((unsigned short)blue) << SHIFT;
 188 #endif
 189     M_COLDATA->m_color.pixel = 0;
 190 }
 191
 192 unsigned char wxColour::Red() const
 193 {
 194     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 195
 196 #if wxUSE_NANOX
 197     return (unsigned char) M_COLDATA->m_color.red ;
 198 #else
 199     return (unsigned char)(M_COLDATA->m_color.red >> SHIFT);
 200 #endif
 201 }
 202
 203 unsigned char wxColour::Green() const
 204 {
 205     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 206
 207 #if wxUSE_NANOX
 208     return (unsigned char) M_COLDATA->m_color.green ;
 209 #else
 210     return (unsigned char)(M_COLDATA->m_color.green >> SHIFT);
 211 #endif
 212 }
 213
 214 unsigned char wxColour::Blue() const
 215 {
 216     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 217
 218 #if wxUSE_NANOX
 219     return (unsigned char) M_COLDATA->m_color.blue ;
 220 #else
 221     return (unsigned char)(M_COLDATA->m_color.blue >> SHIFT);
 222 #endif
 223 }
 224
 225 void wxColour::CalcPixel( WXColormap cmap )
 226 {
 227     wxCHECK_RET( Ok(), wxT("invalid colour") );
 228
 229     wxCHECK_RET( cmap, wxT("invalid colormap") );
 230
 231     M_COLDATA->AllocColour( cmap );
 232 }
 233
 234 unsigned long wxColour::GetPixel() const
 235 {
 236     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 237
 238     return M_COLDATA->m_color.pixel;
 239 }
 240
 241 WXColor *wxColour::GetColor() const
 242 {
 243     wxCHECK_MSG( Ok(), (WXColor *) NULL, wxT("invalid colour") );
 244
 245     return (WXColor*) &M_COLDATA->m_color;
 246 }
 247
 248 bool wxColour::FromString(const wxString& name)
 249 {
 250     Display *dpy = wxGlobalDisplay();
 251     WXColormap colormap = wxTheApp->GetMainColormap( dpy );
 252     XColor xcol;
 253     if ( XParseColor( dpy, (Colormap)colormap, name.mbc_str(), &xcol ) )
 254     {
 255         UnRef();
 256
 257         m_refData = new wxColourRefData;
 258         M_COLDATA->m_colormap = colormap;
 259         M_COLDATA->m_color = xcol;
 260         return true;
 261     }
 262
 263     return wxColourBase::FromString(name);
 264 }