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 (!m_colormap)
  94         return;
  95
  96     if ((wxTheApp->m_visualType == GrayScale) ||
  97         (wxTheApp->m_visualType == PseudoColor))
  98     {
  99         int idx = m_color.pixel;
 100         colMapAllocCounter[ idx ] = colMapAllocCounter[ idx ] - 1;
 101
 102         if (colMapAllocCounter[ idx ] == 0)
 103         {
 104             unsigned long pixel = m_color.pixel;
 105             XFreeColors( wxGlobalDisplay(), (Colormap) m_colormap, &pixel, 1, 0 );
 106         }
 107     }
 108 }
 109
 110 void wxColourRefData::AllocColour( WXColormap cmap )
 111 {
 112     if (m_hasPixel && (m_colormap == cmap))
 113         return;
 114
 115     FreeColour();
 116
 117     if ((wxTheApp->m_visualType == GrayScale) ||
 118         (wxTheApp->m_visualType == PseudoColor))
 119     {
 120         m_hasPixel = XAllocColor( wxGlobalDisplay(), (Colormap) cmap, &m_color );
 121         int idx = m_color.pixel;
 122         colMapAllocCounter[ idx ] = colMapAllocCounter[ idx ] + 1;
 123     }
 124     else
 125     {
 126         m_hasPixel = XAllocColor( wxGlobalDisplay(), (Colormap) cmap, &m_color );
 127     }
 128
 129     m_colormap = cmap;
 130 }
 131
 132 //-----------------------------------------------------------------------------
 133
 134 #define M_COLDATA ((wxColourRefData *)m_refData)
 135
 136 #define SHIFT (8*(sizeof(short int)-sizeof(char)))
 137
 138 IMPLEMENT_DYNAMIC_CLASS(wxColour,wxGDIObject)
 139
 140 wxColour::wxColour( unsigned char red, unsigned char green, unsigned char blue )
 141 {
 142     m_refData = new wxColourRefData();
 143 #if wxUSE_NANOX
 144     M_COLDATA->m_color.red = ((unsigned short)red) ;
 145     M_COLDATA->m_color.green = ((unsigned short)green) ;
 146     M_COLDATA->m_color.blue = ((unsigned short)blue) ;
 147 #else
 148     M_COLDATA->m_color.red = ((unsigned short)red) << SHIFT;
 149     M_COLDATA->m_color.green = ((unsigned short)green) << SHIFT;
 150     M_COLDATA->m_color.blue = ((unsigned short)blue) << SHIFT;
 151 #endif
 152     M_COLDATA->m_color.pixel = 0;
 153 }
 154
 155 void wxColour::InitFromName( const wxString &colourName )
 156 {
 157     wxNode *node = (wxNode *) NULL;
 158     if ( (wxTheColourDatabase) && (node = wxTheColourDatabase->Find(colourName)) )
 159     {
 160         wxColour *col = (wxColour*)node->Data();
 161         UnRef();
 162         if (col) Ref( *col );
 163     }
 164     else
 165     {
 166         m_refData = new wxColourRefData();
 167
 168         M_COLDATA->m_colormap = wxTheApp->GetMainColormap( wxGlobalDisplay() );
 169
 170         if (!XParseColor( wxGlobalDisplay(), (Colormap) M_COLDATA->m_colormap, colourName.mb_str(), &M_COLDATA->m_color ))
 171         {
 172             // VZ: asserts are good in general but this one is triggered by
 173             //     calling wxColourDatabase::FindColour() with an
 174             //     unrecognized colour name and this can't be avoided from the
 175             //     user code, so don't give it here
 176             //
 177             //     a better solution would be to changed code in FindColour()
 178
 179             //wxFAIL_MSG( wxT("wxColour: couldn't find colour") );
 180
 181             delete m_refData;
 182             m_refData = (wxObjectRefData *) NULL;
 183         }
 184     }
 185 }
 186
 187 wxColour::~wxColour()
 188 {
 189 }
 190
 191 bool wxColour::operator == ( const wxColour& col ) const
 192 {
 193     if (m_refData == col.m_refData) return TRUE;
 194
 195     if (!m_refData || !col.m_refData) return FALSE;
 196
 197     XColor *own = &(((wxColourRefData*)m_refData)->m_color);
 198     XColor *other = &(((wxColourRefData*)col.m_refData)->m_color);
 199     if (own->red != other->red) return FALSE;
 200     if (own->blue != other->blue) return FALSE;
 201     if (own->green != other->green) return FALSE;
 202
 203     return TRUE;
 204 }
 205
 206 wxObjectRefData *wxColour::CreateRefData() const
 207 {
 208     return new wxColourRefData;
 209 }
 210
 211 wxObjectRefData *wxColour::CloneRefData(const wxObjectRefData *data) const
 212 {
 213     return new wxColourRefData(*(wxColourRefData *)data);
 214 }
 215
 216 void wxColour::Set( unsigned char red, unsigned char green, unsigned char blue )
 217 {
 218     AllocExclusive();
 219
 220     m_refData = new wxColourRefData();
 221 #if wxUSE_NANOX
 222     M_COLDATA->m_color.red = ((unsigned short)red) ;
 223     M_COLDATA->m_color.green = ((unsigned short)green) ;
 224     M_COLDATA->m_color.blue = ((unsigned short)blue) ;
 225 #else
 226     M_COLDATA->m_color.red = ((unsigned short)red) << SHIFT;
 227     M_COLDATA->m_color.green = ((unsigned short)green) << SHIFT;
 228     M_COLDATA->m_color.blue = ((unsigned short)blue) << SHIFT;
 229 #endif
 230     M_COLDATA->m_color.pixel = 0;
 231 }
 232
 233 unsigned char wxColour::Red() const
 234 {
 235     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 236
 237 #if wxUSE_NANOX
 238     return (unsigned char) M_COLDATA->m_color.red ;
 239 #else
 240     return (unsigned char)(M_COLDATA->m_color.red >> SHIFT);
 241 #endif
 242 }
 243
 244 unsigned char wxColour::Green() const
 245 {
 246     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 247
 248 #if wxUSE_NANOX
 249     return (unsigned char) M_COLDATA->m_color.green ;
 250 #else
 251     return (unsigned char)(M_COLDATA->m_color.green >> SHIFT);
 252 #endif
 253 }
 254
 255 unsigned char wxColour::Blue() const
 256 {
 257     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 258
 259 #if wxUSE_NANOX
 260     return (unsigned char) M_COLDATA->m_color.blue ;
 261 #else
 262     return (unsigned char)(M_COLDATA->m_color.blue >> SHIFT);
 263 #endif
 264 }
 265
 266 void wxColour::CalcPixel( WXColormap cmap )
 267 {
 268     wxCHECK_RET( Ok(), wxT("invalid colour") );
 269
 270     wxCHECK_RET( cmap, wxT("invalid colormap") );
 271
 272     M_COLDATA->AllocColour( cmap );
 273 }
 274
 275 unsigned long wxColour::GetPixel() const
 276 {
 277     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 278
 279     return M_COLDATA->m_color.pixel;
 280 }
 281
 282 WXColor *wxColour::GetColor() const
 283 {
 284     wxCHECK_MSG( Ok(), (WXColor *) NULL, wxT("invalid colour") );
 285
 286     return (WXColor*) &M_COLDATA->m_color;
 287 }