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 #ifdef __GNUG__
  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
  39     ~wxColourRefData()
  40     {
  41         FreeColour();
  42     }
  43
  44     bool operator == (const wxColourRefData& data) const
  45     {
  46         return (m_colormap == data.m_colormap &&
  47                 m_hasPixel == data.m_hasPixel &&
  48                 m_color.red == data.m_color.red &&
  49                 m_color.green == data.m_color.green &&
  50                 m_color.blue == data.m_color.blue &&
  51                 m_color.pixel == data.m_color.pixel);
  52     }
  53
  54     void FreeColour();
  55     void AllocColour( WXColormap cmap );
  56
  57     XColor       m_color;
  58     WXColormap   m_colormap;
  59     bool         m_hasPixel;
  60
  61     friend class wxColour;
  62
  63     // reference counter for systems with <= 8-Bit display
  64     static unsigned short colMapAllocCounter[ 256 ];
  65 };
  66
  67 unsigned short wxColourRefData::colMapAllocCounter[ 256 ] =
  68 {
  69   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  70   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  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
  82 };
  83
  84 void wxColourRefData::FreeColour()
  85 {
  86 #if 0
  87     if (m_colormap)
  88     {
  89         Colormap cm = (Colormap)m_colormap;
  90
  91         GdkColormapPrivate *private_colormap = (GdkColormapPrivate*) m_colormap;
  92         if ((private_colormap->visual->type == GDK_VISUAL_GRAYSCALE) ||
  93             (private_colormap->visual->type == GDK_VISUAL_PSEUDO_COLOR))
  94         {
  95             int idx = m_color.pixel;
  96             colMapAllocCounter[ idx ] = colMapAllocCounter[ idx ] - 1;
  97
  98             if (colMapAllocCounter[ idx ] == 0)
  99             gdk_colormap_free_colors( m_colormap, &m_color, 1 );
 100         }
 101     }
 102 #endif
 103 }
 104
 105 void wxColourRefData::AllocColour( WXColormap cmap )
 106 {
 107     if (m_hasPixel && (m_colormap == cmap))
 108         return;
 109
 110     FreeColour();
 111
 112 #if 0
 113     GdkColormapPrivate *private_colormap = (GdkColormapPrivate*) cmap;
 114     if ((private_colormap->visual->type == GDK_VISUAL_GRAYSCALE) ||
 115         (private_colormap->visual->type == GDK_VISUAL_PSEUDO_COLOR))
 116     {
 117         m_hasPixel = gdk_colormap_alloc_color( cmap, &m_color, FALSE, TRUE );
 118         int idx = m_color.pixel;
 119         colMapAllocCounter[ idx ] = colMapAllocCounter[ idx ] + 1;
 120     }
 121     else
 122 #endif
 123     {
 124         m_hasPixel = XAllocColor( wxGlobalDisplay(), (Colormap) cmap, &m_color );
 125     }
 126     m_colormap = cmap;
 127 }
 128
 129 //-----------------------------------------------------------------------------
 130
 131 #define M_COLDATA ((wxColourRefData *)m_refData)
 132
 133 #define SHIFT (8*(sizeof(short int)-sizeof(char)))
 134
 135 IMPLEMENT_DYNAMIC_CLASS(wxColour,wxGDIObject)
 136
 137 wxColour::wxColour( unsigned char red, unsigned char green, unsigned char blue )
 138 {
 139     m_refData = new wxColourRefData();
 140     M_COLDATA->m_color.red = ((unsigned short)red) << SHIFT;
 141     M_COLDATA->m_color.green = ((unsigned short)green) << SHIFT;
 142     M_COLDATA->m_color.blue = ((unsigned short)blue) << SHIFT;
 143     M_COLDATA->m_color.pixel = 0;
 144 }
 145
 146 void wxColour::InitFromName( const wxString &colourName )
 147 {
 148     wxNode *node = (wxNode *) NULL;
 149     if ( (wxTheColourDatabase) && (node = wxTheColourDatabase->Find(colourName)) )
 150     {
 151         wxColour *col = (wxColour*)node->Data();
 152         UnRef();
 153         if (col) Ref( *col );
 154     }
 155     else
 156     {
 157         m_refData = new wxColourRefData();
 158
 159         M_COLDATA->m_colormap = wxTheApp->GetMainColormap( wxGlobalDisplay() );
 160
 161         if (!XParseColor( wxGlobalDisplay(), (Colormap) M_COLDATA->m_colormap, colourName.mb_str(), &M_COLDATA->m_color ))
 162         {
 163             // VZ: asserts are good in general but this one is triggered by
 164             //     calling wxColourDatabase::FindColour() with an
 165             //     unrecognized colour name and this can't be avoided from the
 166             //     user code, so don't give it here
 167             //
 168             //     a better solution would be to changed code in FindColour()
 169
 170             //wxFAIL_MSG( wxT("wxColour: couldn't find colour") );
 171
 172             delete m_refData;
 173             m_refData = (wxObjectRefData *) NULL;
 174         }
 175     }
 176 }
 177
 178 wxColour::~wxColour()
 179 {
 180 }
 181
 182 bool wxColour::operator == ( const wxColour& col ) const
 183 {
 184     if (m_refData == col.m_refData) return TRUE;
 185
 186     if (!m_refData || !col.m_refData) return FALSE;
 187
 188     XColor *own = &(((wxColourRefData*)m_refData)->m_color);
 189     XColor *other = &(((wxColourRefData*)col.m_refData)->m_color);
 190     if (own->red != other->red) return FALSE;
 191     if (own->blue != other->blue) return FALSE;
 192     if (own->green != other->green) return FALSE;
 193
 194     return TRUE;
 195 }
 196
 197 wxObjectRefData *wxColour::CreateRefData() const
 198 {
 199     return new wxColourRefData;
 200 }
 201
 202 wxObjectRefData *wxColour::CloneRefData(const wxObjectRefData *data) const
 203 {
 204     return new wxColourRefData(*(wxColourRefData *)data);
 205 }
 206
 207 void wxColour::Set( unsigned char red, unsigned char green, unsigned char blue )
 208 {
 209     AllocExclusive();
 210
 211     m_refData = new wxColourRefData();
 212     M_COLDATA->m_color.red = ((unsigned short)red) << SHIFT;
 213     M_COLDATA->m_color.green = ((unsigned short)green) << SHIFT;
 214     M_COLDATA->m_color.blue = ((unsigned short)blue) << SHIFT;
 215     M_COLDATA->m_color.pixel = 0;
 216 }
 217
 218 unsigned char wxColour::Red() const
 219 {
 220     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 221
 222     return (unsigned char)(M_COLDATA->m_color.red >> SHIFT);
 223 }
 224
 225 unsigned char wxColour::Green() const
 226 {
 227     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 228
 229     return (unsigned char)(M_COLDATA->m_color.green >> SHIFT);
 230 }
 231
 232 unsigned char wxColour::Blue() const
 233 {
 234     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 235
 236     return (unsigned char)(M_COLDATA->m_color.blue >> SHIFT);
 237 }
 238
 239 void wxColour::CalcPixel( WXColormap cmap )
 240 {
 241     wxCHECK_RET( Ok(), wxT("invalid colour") );
 242
 243     wxCHECK_RET( cmap, wxT("invalid colormap") );
 244
 245     M_COLDATA->AllocColour( cmap );
 246 }
 247
 248 unsigned long wxColour::GetPixel() const
 249 {
 250     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 251
 252     return M_COLDATA->m_color.pixel;
 253 }
 254
 255 WXColor *wxColour::GetColor() const
 256 {
 257     wxCHECK_MSG( Ok(), (WXColor *) NULL, wxT("invalid colour") );
 258
 259     return (WXColor*) &M_COLDATA->m_color;
 260 }