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
  19 #include "wx/x11/private.h"
  20
  21 //-----------------------------------------------------------------------------
  22 // wxColour
  23 //-----------------------------------------------------------------------------
  24
  25 class wxColourRefData: public wxObjectRefData
  26 {
  27 public:
  28     wxColourRefData()
  29     {
  30         m_color.red = 0;
  31         m_color.green = 0;
  32         m_color.blue = 0;
  33         m_color.pixel = 0;
  34         m_colormap = (WXColormap *) NULL;
  35         m_hasPixel = FALSE;
  36     }
  37
  38     ~wxColourRefData()
  39     {
  40         FreeColour();
  41     }
  42
  43     bool operator == (const wxColourRefData& data) const
  44     {
  45         return (m_colormap == data.m_colormap &&
  46                 m_hasPixel == data.m_hasPixel &&
  47                 m_color.red == data.m_color.red &&
  48                 m_color.green == data.m_color.green &&
  49                 m_color.blue == data.m_color.blue &&
  50                 m_color.pixel == data.m_color.pixel);
  51     }
  52
  53     void FreeColour();
  54     void AllocColour( WXColormap cmap );
  55
  56     XColor       m_color;
  57     WXColormap   m_colormap;
  58     bool         m_hasPixel;
  59
  60     friend class wxColour;
  61
  62     // reference counter for systems with <= 8-Bit display
  63     static unsigned short colMapAllocCounter[ 256 ];
  64 };
  65
  66 unsigned short wxColourRefData::colMapAllocCounter[ 256 ] =
  67 {
  68   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  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
  81 };
  82
  83 void wxColourRefData::FreeColour()
  84 {
  85     if (m_colormap)
  86     {
  87         Colormap cm = (Colormap)m_colormap;
  88
  89 #if 0
  90         GdkColormapPrivate *private_colormap = (GdkColormapPrivate*) m_colormap;
  91         if ((private_colormap->visual->type == GDK_VISUAL_GRAYSCALE) ||
  92             (private_colormap->visual->type == GDK_VISUAL_PSEUDO_COLOR))
  93         {
  94             int idx = m_color.pixel;
  95             colMapAllocCounter[ idx ] = colMapAllocCounter[ idx ] - 1;
  96
  97             if (colMapAllocCounter[ idx ] == 0)
  98             gdk_colormap_free_colors( m_colormap, &m_color, 1 );
  99         }
 100 #endif
 101     }
 102 }
 103
 104 void wxColourRefData::AllocColour( WXColormap cmap )
 105 {
 106     if (m_hasPixel && (m_colormap == cmap))
 107         return;
 108
 109     FreeColour();
 110
 111 #if 0
 112     GdkColormapPrivate *private_colormap = (GdkColormapPrivate*) cmap;
 113     if ((private_colormap->visual->type == GDK_VISUAL_GRAYSCALE) ||
 114         (private_colormap->visual->type == GDK_VISUAL_PSEUDO_COLOR))
 115     {
 116         m_hasPixel = gdk_colormap_alloc_color( cmap, &m_color, FALSE, TRUE );
 117         int idx = m_color.pixel;
 118         colMapAllocCounter[ idx ] = colMapAllocCounter[ idx ] + 1;
 119     }
 120     else
 121 #endif
 122     {
 123         m_hasPixel = XAllocColor( wxGlobalDisplay(), (Colormap) cmap, &m_color );
 124     }
 125     m_colormap = cmap;
 126 }
 127
 128 //-----------------------------------------------------------------------------
 129
 130 #define M_COLDATA ((wxColourRefData *)m_refData)
 131
 132 #define SHIFT (8*(sizeof(short int)-sizeof(char)))
 133
 134 IMPLEMENT_DYNAMIC_CLASS(wxColour,wxGDIObject)
 135
 136 wxColour::wxColour( unsigned char red, unsigned char green, unsigned char blue )
 137 {
 138     m_refData = new wxColourRefData();
 139     M_COLDATA->m_color.red = ((unsigned short)red) << SHIFT;
 140     M_COLDATA->m_color.green = ((unsigned short)green) << SHIFT;
 141     M_COLDATA->m_color.blue = ((unsigned short)blue) << SHIFT;
 142     M_COLDATA->m_color.pixel = 0;
 143 }
 144
 145 void wxColour::InitFromName( const wxString &colourName )
 146 {
 147     wxNode *node = (wxNode *) NULL;
 148     if ( (wxTheColourDatabase) && (node = wxTheColourDatabase->Find(colourName)) )
 149     {
 150         wxColour *col = (wxColour*)node->Data();
 151         UnRef();
 152         if (col) Ref( *col );
 153     }
 154     else
 155     {
 156         m_refData = new wxColourRefData();
 157         if (!XParseColor( wxGlobalDisplay(), (Colormap) M_COLDATA->m_colormap, colourName.mb_str(), &M_COLDATA->m_color ))
 158         {
 159             // VZ: asserts are good in general but this one is triggered by
 160             //     calling wxColourDatabase::FindColour() with an
 161             //     unrecognized colour name and this can't be avoided from the
 162             //     user code, so don't give it here
 163             //
 164             //     a better solution would be to changed code in FindColour()
 165
 166             //wxFAIL_MSG( wxT("wxColour: couldn't find colour") );
 167
 168             delete m_refData;
 169             m_refData = (wxObjectRefData *) NULL;
 170         }
 171     }
 172 }
 173
 174 wxColour::~wxColour()
 175 {
 176 }
 177
 178 bool wxColour::operator == ( const wxColour& col ) const
 179 {
 180     if (m_refData == col.m_refData) return TRUE;
 181
 182     if (!m_refData || !col.m_refData) return FALSE;
 183
 184     XColor *own = &(((wxColourRefData*)m_refData)->m_color);
 185     XColor *other = &(((wxColourRefData*)col.m_refData)->m_color);
 186     if (own->red != other->red) return FALSE;
 187     if (own->blue != other->blue) return FALSE;
 188     if (own->green != other->green) return FALSE;
 189
 190     return TRUE;
 191 }
 192
 193 wxObjectRefData *wxColour::CreateRefData() const
 194 {
 195     return new wxColourRefData;
 196 }
 197
 198 wxObjectRefData *wxColour::CloneRefData(const wxObjectRefData *data) const
 199 {
 200     return new wxColourRefData(*(wxColourRefData *)data);
 201 }
 202
 203 void wxColour::Set( unsigned char red, unsigned char green, unsigned char blue )
 204 {
 205     AllocExclusive();
 206
 207     m_refData = new wxColourRefData();
 208     M_COLDATA->m_color.red = ((unsigned short)red) << SHIFT;
 209     M_COLDATA->m_color.green = ((unsigned short)green) << SHIFT;
 210     M_COLDATA->m_color.blue = ((unsigned short)blue) << SHIFT;
 211     M_COLDATA->m_color.pixel = 0;
 212 }
 213
 214 unsigned char wxColour::Red() const
 215 {
 216     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 217
 218     return (unsigned char)(M_COLDATA->m_color.red >> SHIFT);
 219 }
 220
 221 unsigned char wxColour::Green() const
 222 {
 223     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 224
 225     return (unsigned char)(M_COLDATA->m_color.green >> SHIFT);
 226 }
 227
 228 unsigned char wxColour::Blue() const
 229 {
 230     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 231
 232     return (unsigned char)(M_COLDATA->m_color.blue >> SHIFT);
 233 }
 234
 235 void wxColour::CalcPixel( WXColormap cmap )
 236 {
 237     if (!Ok()) return;
 238
 239     M_COLDATA->AllocColour( cmap );
 240 }
 241
 242 unsigned long wxColour::GetPixel() const
 243 {
 244     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 245
 246     return M_COLDATA->m_color.pixel;
 247 }
 248
 249 WXColor *wxColour::GetColor() const
 250 {
 251     wxCHECK_MSG( Ok(), (WXColor *) NULL, wxT("invalid colour") );
 252
 253     return (WXColor*) &M_COLDATA->m_color;
 254 }