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 // Copyright:   (c) Julian Smart, Robert Roebling
   8 // Licence:     wxWindows licence
   9 /////////////////////////////////////////////////////////////////////////////
  10
  11 // For compilers that support precompilation, includes "wx.h".
  12 #include "wx/wxprec.h"
  13
  14 #include "wx/colour.h"
  15
  16 #ifndef WX_PRECOMP
  17     #include "wx/app.h"
  18     #include "wx/gdicmn.h"
  19 #endif
  20
  21 #include "wx/x11/private.h"
  22
  23 //-----------------------------------------------------------------------------
  24 // wxColour
  25 //-----------------------------------------------------------------------------
  26
  27 class wxColourRefData : public wxGDIRefData
  28 {
  29 public:
  30     wxColourRefData()
  31     {
  32         m_color.red = 0;
  33         m_color.green = 0;
  34         m_color.blue = 0;
  35         m_color.pixel = 0;
  36         m_colormap = NULL;
  37         m_hasPixel = false;
  38     }
  39
  40     wxColourRefData(const wxColourRefData& data)
  41     {
  42         m_color = data.m_color;
  43         m_colormap = data.m_colormap;
  44         m_hasPixel = data.m_hasPixel;
  45     }
  46
  47     virtual ~wxColourRefData()
  48     {
  49         FreeColour();
  50     }
  51
  52     bool operator==(const wxColourRefData& data) const
  53     {
  54         return (m_colormap == data.m_colormap &&
  55                 m_hasPixel == data.m_hasPixel &&
  56                 m_color.red == data.m_color.red &&
  57                 m_color.green == data.m_color.green &&
  58                 m_color.blue == data.m_color.blue &&
  59                 m_color.pixel == data.m_color.pixel);
  60     }
  61
  62     void FreeColour();
  63     void AllocColour( WXColormap cmap );
  64
  65     XColor       m_color;
  66     WXColormap   m_colormap;
  67     bool         m_hasPixel;
  68
  69     friend class wxColour;
  70
  71     // reference counter for systems with <= 8-Bit display
  72     static unsigned short colMapAllocCounter[ 256 ];
  73 };
  74
  75 unsigned short wxColourRefData::colMapAllocCounter[ 256 ] =
  76 {
  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, 0, 0, 0, 0,
  89   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
  90 };
  91
  92 void wxColourRefData::FreeColour()
  93 {
  94     if (!m_colormap)
  95         return;
  96 #if !wxUSE_NANOX
  97     if ( wxTheApp &&
  98          (wxTheApp->m_visualInfo->m_visualType == GrayScale ||
  99           wxTheApp->m_visualInfo->m_visualType == PseudoColor) )
 100     {
 101         int idx = m_color.pixel;
 102         colMapAllocCounter[ idx ] = colMapAllocCounter[ idx ] - 1;
 103
 104         if (colMapAllocCounter[ idx ] == 0)
 105         {
 106             unsigned long pixel = m_color.pixel;
 107             XFreeColors( wxGlobalDisplay(), (Colormap) m_colormap, &pixel, 1, 0 );
 108         }
 109     }
 110 #endif
 111 }
 112
 113 void wxColourRefData::AllocColour( WXColormap cmap )
 114 {
 115     if (m_hasPixel && (m_colormap == cmap))
 116         return;
 117
 118     FreeColour();
 119
 120 #if !wxUSE_NANOX
 121     if ((wxTheApp->m_visualInfo->m_visualType == GrayScale) ||
 122         (wxTheApp->m_visualInfo->m_visualType == PseudoColor))
 123     {
 124         m_hasPixel = XAllocColor( wxGlobalDisplay(), (Colormap) cmap, &m_color );
 125         int idx = m_color.pixel;
 126         colMapAllocCounter[ idx ] = colMapAllocCounter[ idx ] + 1;
 127     }
 128     else
 129 #endif
 130     {
 131         m_hasPixel = XAllocColor( wxGlobalDisplay(), (Colormap) cmap, &m_color );
 132     }
 133
 134     m_colormap = cmap;
 135 }
 136
 137 //-----------------------------------------------------------------------------
 138
 139 #define M_COLDATA ((wxColourRefData *)m_refData)
 140
 141 #define SHIFT (8*(sizeof(short int)-sizeof(char)))
 142
 143 wxColour::~wxColour()
 144 {
 145 }
 146
 147 bool wxColour::operator == ( const wxColour& col ) const
 148 {
 149     if (m_refData == col.m_refData) return true;
 150
 151     if (!m_refData || !col.m_refData) return false;
 152
 153     XColor *own = &(((wxColourRefData*)m_refData)->m_color);
 154     XColor *other = &(((wxColourRefData*)col.m_refData)->m_color);
 155
 156     return (own->red == other->red)
 157         && (own->green == other->green)
 158         && (own->blue == other->blue) ;
 159
 160 }
 161
 162 wxGDIRefData *wxColour::CreateGDIRefData() const
 163 {
 164     return new wxColourRefData;
 165 }
 166
 167 wxGDIRefData *wxColour::CloneGDIRefData(const wxGDIRefData *data) const
 168 {
 169     return new wxColourRefData(*(wxColourRefData *)data);
 170 }
 171
 172 void wxColour::InitRGBA(unsigned char red, unsigned char green, unsigned char blue,
 173                         unsigned char WXUNUSED(alpha))
 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( IsOk(), 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( IsOk(), 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( IsOk(), 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( IsOk(), 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( IsOk(), 0, wxT("invalid colour") );
 234
 235     return M_COLDATA->m_color.pixel;
 236 }
 237
 238 WXColor *wxColour::GetColor() const
 239 {
 240     wxCHECK_MSG( IsOk(), NULL, wxT("invalid colour") );
 241
 242     return (WXColor*) &M_COLDATA->m_color;
 243 }
 244
 245 bool wxColour::FromString(const wxString& name)
 246 {
 247     Display *dpy = wxGlobalDisplay();
 248     WXColormap colormap = wxTheApp->GetMainColormap( dpy );
 249     XColor xcol;
 250     if ( XParseColor( dpy, (Colormap)colormap, name.mbc_str(), &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 }