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 #endif
  20
  21 #include "wx/gdicmn.h"
  22
  23 #include "wx/x11/private.h"
  24
  25 //-----------------------------------------------------------------------------
  26 // wxColour
  27 //-----------------------------------------------------------------------------
  28
  29 class wxColourRefData: public wxObjectRefData
  30 {
  31 public:
  32     wxColourRefData()
  33     {
  34         m_color.red = 0;
  35         m_color.green = 0;
  36         m_color.blue = 0;
  37         m_color.pixel = 0;
  38         m_colormap = (WXColormap *) NULL;
  39         m_hasPixel = false;
  40     }
  41     wxColourRefData(const wxColourRefData& data):
  42         wxObjectRefData()
  43     {
  44         m_color = data.m_color;
  45         m_colormap = data.m_colormap;
  46         m_hasPixel = data.m_hasPixel;
  47     }
  48
  49     ~wxColourRefData()
  50     {
  51         FreeColour();
  52     }
  53
  54     bool operator == (const wxColourRefData& data) const
  55     {
  56         return (m_colormap == data.m_colormap &&
  57                 m_hasPixel == data.m_hasPixel &&
  58                 m_color.red == data.m_color.red &&
  59                 m_color.green == data.m_color.green &&
  60                 m_color.blue == data.m_color.blue &&
  61                 m_color.pixel == data.m_color.pixel);
  62     }
  63
  64     void FreeColour();
  65     void AllocColour( WXColormap cmap );
  66
  67     XColor       m_color;
  68     WXColormap   m_colormap;
  69     bool         m_hasPixel;
  70
  71     friend class wxColour;
  72
  73     // reference counter for systems with <= 8-Bit display
  74     static unsigned short colMapAllocCounter[ 256 ];
  75 };
  76
  77 unsigned short wxColourRefData::colMapAllocCounter[ 256 ] =
  78 {
  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, 0, 0, 0, 0,
  91   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
  92 };
  93
  94 void wxColourRefData::FreeColour()
  95 {
  96     if (!m_colormap)
  97         return;
  98 #if !wxUSE_NANOX
  99     if ( wxTheApp &&
 100          (wxTheApp->m_visualInfo->m_visualType == GrayScale ||
 101           wxTheApp->m_visualInfo->m_visualType == PseudoColor) )
 102     {
 103         int idx = m_color.pixel;
 104         colMapAllocCounter[ idx ] = colMapAllocCounter[ idx ] - 1;
 105
 106         if (colMapAllocCounter[ idx ] == 0)
 107         {
 108             unsigned long pixel = m_color.pixel;
 109             XFreeColors( wxGlobalDisplay(), (Colormap) m_colormap, &pixel, 1, 0 );
 110         }
 111     }
 112 #endif
 113 }
 114
 115 void wxColourRefData::AllocColour( WXColormap cmap )
 116 {
 117     if (m_hasPixel && (m_colormap == cmap))
 118         return;
 119
 120     FreeColour();
 121
 122 #if !wxUSE_NANOX
 123     if ((wxTheApp->m_visualInfo->m_visualType == GrayScale) ||
 124         (wxTheApp->m_visualInfo->m_visualType == PseudoColor))
 125     {
 126         m_hasPixel = XAllocColor( wxGlobalDisplay(), (Colormap) cmap, &m_color );
 127         int idx = m_color.pixel;
 128         colMapAllocCounter[ idx ] = colMapAllocCounter[ idx ] + 1;
 129     }
 130     else
 131 #endif
 132     {
 133         m_hasPixel = XAllocColor( wxGlobalDisplay(), (Colormap) cmap, &m_color );
 134     }
 135
 136     m_colormap = cmap;
 137 }
 138
 139 //-----------------------------------------------------------------------------
 140
 141 #define M_COLDATA ((wxColourRefData *)m_refData)
 142
 143 #define SHIFT (8*(sizeof(short int)-sizeof(char)))
 144
 145 IMPLEMENT_DYNAMIC_CLASS(wxColour,wxGDIObject)
 146
 147 wxColour::~wxColour()
 148 {
 149 }
 150
 151 bool wxColour::operator == ( const wxColour& col ) const
 152 {
 153     if (m_refData == col.m_refData) return true;
 154
 155     if (!m_refData || !col.m_refData) return false;
 156
 157     XColor *own = &(((wxColourRefData*)m_refData)->m_color);
 158     XColor *other = &(((wxColourRefData*)col.m_refData)->m_color);
 159
 160     return (own->red == other->red)
 161         && (own->green == other->green)
 162         && (own->blue == other->blue) ;
 163
 164 }
 165
 166 wxObjectRefData *wxColour::CreateRefData() const
 167 {
 168     return new wxColourRefData;
 169 }
 170
 171 wxObjectRefData *wxColour::CloneRefData(const wxObjectRefData *data) const
 172 {
 173     return new wxColourRefData(*(wxColourRefData *)data);
 174 }
 175
 176 void wxColour::InitWith( unsigned char red, unsigned char green, unsigned char blue )
 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 wxChar *name)
 249 {
 250     Display *dpy = wxGlobalDisplay();
 251     WXColormap colormap = wxTheApp->GetMainColormap( dpy );
 252     XColor xcol;
 253     if ( XParseColor( dpy, (Colormap)colormap, name , &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 }