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 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  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 #if !wxUSE_NANOX
  96     if ((wxTheApp->m_visualInfo->m_visualType == GrayScale) ||
  97         (wxTheApp->m_visualInfo->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 #endif
 109 }
 110
 111 void wxColourRefData::AllocColour( WXColormap cmap )
 112 {
 113     if (m_hasPixel && (m_colormap == cmap))
 114         return;
 115
 116     FreeColour();
 117
 118 #if !wxUSE_NANOX
 119     if ((wxTheApp->m_visualInfo->m_visualType == GrayScale) ||
 120         (wxTheApp->m_visualInfo->m_visualType == PseudoColor))
 121     {
 122         m_hasPixel = XAllocColor( wxGlobalDisplay(), (Colormap) cmap, &m_color );
 123         int idx = m_color.pixel;
 124         colMapAllocCounter[ idx ] = colMapAllocCounter[ idx ] + 1;
 125     }
 126     else
 127 #endif
 128     {
 129         m_hasPixel = XAllocColor( wxGlobalDisplay(), (Colormap) cmap, &m_color );
 130     }
 131
 132     m_colormap = cmap;
 133 }
 134
 135 //-----------------------------------------------------------------------------
 136
 137 #define M_COLDATA ((wxColourRefData *)m_refData)
 138
 139 #define SHIFT (8*(sizeof(short int)-sizeof(char)))
 140
 141 IMPLEMENT_DYNAMIC_CLASS(wxColour,wxGDIObject)
 142
 143 wxColour::wxColour( unsigned char red, unsigned char green, unsigned char blue )
 144 {
 145     m_refData = new wxColourRefData();
 146 #if wxUSE_NANOX
 147     M_COLDATA->m_color.red = ((unsigned short)red) ;
 148     M_COLDATA->m_color.green = ((unsigned short)green) ;
 149     M_COLDATA->m_color.blue = ((unsigned short)blue) ;
 150 #else
 151     M_COLDATA->m_color.red = ((unsigned short)red) << SHIFT;
 152     M_COLDATA->m_color.green = ((unsigned short)green) << SHIFT;
 153     M_COLDATA->m_color.blue = ((unsigned short)blue) << SHIFT;
 154 #endif
 155     M_COLDATA->m_color.pixel = 0;
 156 }
 157
 158 void wxColour::InitFromName( const wxString &colourName )
 159 {
 160     wxColour* col;
 161     if ( (wxTheColourDatabase) && (col = wxTheColourDatabase->FindColourNoAdd(colourName)) )
 162     {
 163         UnRef();
 164         if (col) Ref( *col );
 165     }
 166     else
 167     {
 168         m_refData = new wxColourRefData();
 169
 170         M_COLDATA->m_colormap = wxTheApp->GetMainColormap( wxGlobalDisplay() );
 171
 172         if (!XParseColor( wxGlobalDisplay(), (Colormap) M_COLDATA->m_colormap, colourName.mb_str(), &M_COLDATA->m_color ))
 173         {
 174             // VZ: asserts are good in general but this one is triggered by
 175             //     calling wxColourDatabase::FindColour() with an
 176             //     unrecognized colour name and this can't be avoided from the
 177             //     user code, so don't give it here
 178             //
 179             //     a better solution would be to changed code in FindColour()
 180
 181             //wxFAIL_MSG( wxT("wxColour: couldn't find colour") );
 182
 183             delete m_refData;
 184             m_refData = (wxObjectRefData *) NULL;
 185         }
 186     }
 187 }
 188
 189 wxColour::~wxColour()
 190 {
 191 }
 192
 193 bool wxColour::operator == ( const wxColour& col ) const
 194 {
 195     if (m_refData == col.m_refData) return TRUE;
 196
 197     if (!m_refData || !col.m_refData) return FALSE;
 198
 199     XColor *own = &(((wxColourRefData*)m_refData)->m_color);
 200     XColor *other = &(((wxColourRefData*)col.m_refData)->m_color);
 201     if (own->red != other->red) return FALSE;
 202     if (own->blue != other->blue) return FALSE;
 203     if (own->green != other->green) return FALSE;
 204
 205     return TRUE;
 206 }
 207
 208 wxObjectRefData *wxColour::CreateRefData() const
 209 {
 210     return new wxColourRefData;
 211 }
 212
 213 wxObjectRefData *wxColour::CloneRefData(const wxObjectRefData *data) const
 214 {
 215     return new wxColourRefData(*(wxColourRefData *)data);
 216 }
 217
 218 void wxColour::Set( unsigned char red, unsigned char green, unsigned char blue )
 219 {
 220     AllocExclusive();
 221
 222     m_refData = new wxColourRefData();
 223 #if wxUSE_NANOX
 224     M_COLDATA->m_color.red = ((unsigned short)red) ;
 225     M_COLDATA->m_color.green = ((unsigned short)green) ;
 226     M_COLDATA->m_color.blue = ((unsigned short)blue) ;
 227 #else
 228     M_COLDATA->m_color.red = ((unsigned short)red) << SHIFT;
 229     M_COLDATA->m_color.green = ((unsigned short)green) << SHIFT;
 230     M_COLDATA->m_color.blue = ((unsigned short)blue) << SHIFT;
 231 #endif
 232     M_COLDATA->m_color.pixel = 0;
 233 }
 234
 235 unsigned char wxColour::Red() const
 236 {
 237     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 238
 239 #if wxUSE_NANOX
 240     return (unsigned char) M_COLDATA->m_color.red ;
 241 #else
 242     return (unsigned char)(M_COLDATA->m_color.red >> SHIFT);
 243 #endif
 244 }
 245
 246 unsigned char wxColour::Green() const
 247 {
 248     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 249
 250 #if wxUSE_NANOX
 251     return (unsigned char) M_COLDATA->m_color.green ;
 252 #else
 253     return (unsigned char)(M_COLDATA->m_color.green >> SHIFT);
 254 #endif
 255 }
 256
 257 unsigned char wxColour::Blue() const
 258 {
 259     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 260
 261 #if wxUSE_NANOX
 262     return (unsigned char) M_COLDATA->m_color.blue ;
 263 #else
 264     return (unsigned char)(M_COLDATA->m_color.blue >> SHIFT);
 265 #endif
 266 }
 267
 268 void wxColour::CalcPixel( WXColormap cmap )
 269 {
 270     wxCHECK_RET( Ok(), wxT("invalid colour") );
 271
 272     wxCHECK_RET( cmap, wxT("invalid colormap") );
 273
 274     M_COLDATA->AllocColour( cmap );
 275 }
 276
 277 unsigned long wxColour::GetPixel() const
 278 {
 279     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 280
 281     return M_COLDATA->m_color.pixel;
 282 }
 283
 284 WXColor *wxColour::GetColor() const
 285 {
 286     wxCHECK_MSG( Ok(), (WXColor *) NULL, wxT("invalid colour") );
 287
 288     return (WXColor*) &M_COLDATA->m_color;
 289 }