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     wxColourRefData(const wxColourRefData& data):
  39         wxObjectRefData()
  40     {
  41         m_color = data.m_color;
  42         m_colormap = data.m_colormap;
  43         m_hasPixel = data.m_hasPixel;
  44     }
  45
  46     ~wxColourRefData()
  47     {
  48         FreeColour();
  49     }
  50
  51     bool operator == (const wxColourRefData& data) const
  52     {
  53         return (m_colormap == data.m_colormap &&
  54                 m_hasPixel == data.m_hasPixel &&
  55                 m_color.red == data.m_color.red &&
  56                 m_color.green == data.m_color.green &&
  57                 m_color.blue == data.m_color.blue &&
  58                 m_color.pixel == data.m_color.pixel);
  59     }
  60
  61     void FreeColour();
  62     void AllocColour( WXColormap cmap );
  63
  64     XColor       m_color;
  65     WXColormap   m_colormap;
  66     bool         m_hasPixel;
  67
  68     friend class wxColour;
  69
  70     // reference counter for systems with <= 8-Bit display
  71     static unsigned short colMapAllocCounter[ 256 ];
  72 };
  73
  74 unsigned short wxColourRefData::colMapAllocCounter[ 256 ] =
  75 {
  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, 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
  89 };
  90
  91 void wxColourRefData::FreeColour()
  92 {
  93 #if 0
  94     if (m_colormap)
  95     {
  96         Colormap cm = (Colormap)m_colormap;
  97
  98         GdkColormapPrivate *private_colormap = (GdkColormapPrivate*) m_colormap;
  99         if ((private_colormap->visual->type == GDK_VISUAL_GRAYSCALE) ||
 100             (private_colormap->visual->type == GDK_VISUAL_PSEUDO_COLOR))
 101         {
 102             int idx = m_color.pixel;
 103             colMapAllocCounter[ idx ] = colMapAllocCounter[ idx ] - 1;
 104
 105             if (colMapAllocCounter[ idx ] == 0)
 106             gdk_colormap_free_colors( m_colormap, &m_color, 1 );
 107         }
 108     }
 109 #endif
 110 }
 111
 112 void wxColourRefData::AllocColour( WXColormap cmap )
 113 {
 114     if (m_hasPixel && (m_colormap == cmap))
 115         return;
 116
 117     FreeColour();
 118
 119 #if 0
 120     GdkColormapPrivate *private_colormap = (GdkColormapPrivate*) cmap;
 121     if ((private_colormap->visual->type == GDK_VISUAL_GRAYSCALE) ||
 122         (private_colormap->visual->type == GDK_VISUAL_PSEUDO_COLOR))
 123     {
 124         m_hasPixel = gdk_colormap_alloc_color( cmap, &m_color, FALSE, TRUE );
 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     m_colormap = cmap;
 134 }
 135
 136 //-----------------------------------------------------------------------------
 137
 138 #define M_COLDATA ((wxColourRefData *)m_refData)
 139
 140 #define SHIFT (8*(sizeof(short int)-sizeof(char)))
 141
 142 IMPLEMENT_DYNAMIC_CLASS(wxColour,wxGDIObject)
 143
 144 wxColour::wxColour( unsigned char red, unsigned char green, unsigned char blue )
 145 {
 146     m_refData = new wxColourRefData();
 147 #if wxUSE_NANOX
 148     M_COLDATA->m_color.red = ((unsigned short)red) ;
 149     M_COLDATA->m_color.green = ((unsigned short)green) ;
 150     M_COLDATA->m_color.blue = ((unsigned short)blue) ;
 151 #else
 152     M_COLDATA->m_color.red = ((unsigned short)red) << SHIFT;
 153     M_COLDATA->m_color.green = ((unsigned short)green) << SHIFT;
 154     M_COLDATA->m_color.blue = ((unsigned short)blue) << SHIFT;
 155 #endif
 156     M_COLDATA->m_color.pixel = 0;
 157 }
 158
 159 void wxColour::InitFromName( const wxString &colourName )
 160 {
 161     wxNode *node = (wxNode *) NULL;
 162     if ( (wxTheColourDatabase) && (node = wxTheColourDatabase->Find(colourName)) )
 163     {
 164         wxColour *col = (wxColour*)node->Data();
 165         UnRef();
 166         if (col) Ref( *col );
 167     }
 168     else
 169     {
 170         m_refData = new wxColourRefData();
 171
 172         M_COLDATA->m_colormap = wxTheApp->GetMainColormap( wxGlobalDisplay() );
 173
 174         if (!XParseColor( wxGlobalDisplay(), (Colormap) M_COLDATA->m_colormap, colourName.mb_str(), &M_COLDATA->m_color ))
 175         {
 176             // VZ: asserts are good in general but this one is triggered by
 177             //     calling wxColourDatabase::FindColour() with an
 178             //     unrecognized colour name and this can't be avoided from the
 179             //     user code, so don't give it here
 180             //
 181             //     a better solution would be to changed code in FindColour()
 182
 183             //wxFAIL_MSG( wxT("wxColour: couldn't find colour") );
 184
 185             delete m_refData;
 186             m_refData = (wxObjectRefData *) NULL;
 187         }
 188     }
 189 }
 190
 191 wxColour::~wxColour()
 192 {
 193 }
 194
 195 bool wxColour::operator == ( const wxColour& col ) const
 196 {
 197     if (m_refData == col.m_refData) return TRUE;
 198
 199     if (!m_refData || !col.m_refData) return FALSE;
 200
 201     XColor *own = &(((wxColourRefData*)m_refData)->m_color);
 202     XColor *other = &(((wxColourRefData*)col.m_refData)->m_color);
 203     if (own->red != other->red) return FALSE;
 204     if (own->blue != other->blue) return FALSE;
 205     if (own->green != other->green) return FALSE;
 206
 207     return TRUE;
 208 }
 209
 210 wxObjectRefData *wxColour::CreateRefData() const
 211 {
 212     return new wxColourRefData;
 213 }
 214
 215 wxObjectRefData *wxColour::CloneRefData(const wxObjectRefData *data) const
 216 {
 217     return new wxColourRefData(*(wxColourRefData *)data);
 218 }
 219
 220 void wxColour::Set( unsigned char red, unsigned char green, unsigned char blue )
 221 {
 222     AllocExclusive();
 223
 224     m_refData = new wxColourRefData();
 225 #if wxUSE_NANOX
 226     M_COLDATA->m_color.red = ((unsigned short)red) ;
 227     M_COLDATA->m_color.green = ((unsigned short)green) ;
 228     M_COLDATA->m_color.blue = ((unsigned short)blue) ;
 229 #else
 230     M_COLDATA->m_color.red = ((unsigned short)red) << SHIFT;
 231     M_COLDATA->m_color.green = ((unsigned short)green) << SHIFT;
 232     M_COLDATA->m_color.blue = ((unsigned short)blue) << SHIFT;
 233 #endif
 234     M_COLDATA->m_color.pixel = 0;
 235 }
 236
 237 unsigned char wxColour::Red() const
 238 {
 239     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 240
 241 #if wxUSE_NANOX
 242     return (unsigned char) M_COLDATA->m_color.red ;
 243 #else
 244     return (unsigned char)(M_COLDATA->m_color.red >> SHIFT);
 245 #endif
 246 }
 247
 248 unsigned char wxColour::Green() const
 249 {
 250     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 251
 252 #if wxUSE_NANOX
 253     return (unsigned char) M_COLDATA->m_color.green ;
 254 #else
 255     return (unsigned char)(M_COLDATA->m_color.green >> SHIFT);
 256 #endif
 257 }
 258
 259 unsigned char wxColour::Blue() const
 260 {
 261     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 262
 263 #if wxUSE_NANOX
 264     return (unsigned char) M_COLDATA->m_color.blue ;
 265 #else
 266     return (unsigned char)(M_COLDATA->m_color.blue >> SHIFT);
 267 #endif
 268 }
 269
 270 void wxColour::CalcPixel( WXColormap cmap )
 271 {
 272     wxCHECK_RET( Ok(), wxT("invalid colour") );
 273
 274     wxCHECK_RET( cmap, wxT("invalid colormap") );
 275
 276     M_COLDATA->AllocColour( cmap );
 277 }
 278
 279 unsigned long wxColour::GetPixel() const
 280 {
 281     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 282
 283     return M_COLDATA->m_color.pixel;
 284 }
 285
 286 WXColor *wxColour::GetColor() const
 287 {
 288     wxCHECK_MSG( Ok(), (WXColor *) NULL, wxT("invalid colour") );
 289
 290     return (WXColor*) &M_COLDATA->m_color;
 291 }