src/gtk1/colour.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk1/colour.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Id:          $Id$
   6 // Copyright:   (c) 1998 Robert Roebling
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 // For compilers that support precompilation, includes "wx.h".
  11 #include "wx/wxprec.h"
  12
  13 #include "wx/colour.h"
  14
  15 #ifndef WX_PRECOMP
  16     #include "wx/gdicmn.h"
  17 #endif
  18
  19 #include "wx/gtk1/private.h"
  20
  21 #include <gdk/gdk.h>
  22 #include <gdk/gdkx.h>
  23 #include <gdk/gdkprivate.h>
  24
  25 //-----------------------------------------------------------------------------
  26 // wxColour
  27 //-----------------------------------------------------------------------------
  28
  29 class wxColourRefData: public wxObjectRefData
  30 {
  31 public:
  32     wxColourRefData()
  33     {
  34         m_color.red = 0;
  35         m_color.green = 0;
  36         m_color.blue = 0;
  37         m_color.pixel = 0;
  38         m_colormap = (GdkColormap *) NULL;
  39         m_hasPixel = false;
  40     }
  41
  42     wxColourRefData(const wxColourRefData& data)
  43         : wxObjectRefData()
  44     {
  45         m_color = data.m_color;
  46         m_colormap = data.m_colormap;
  47         m_hasPixel = data.m_hasPixel;
  48     }
  49
  50     virtual ~wxColourRefData()
  51     {
  52         FreeColour();
  53     }
  54
  55     bool operator == (const wxColourRefData& data) const
  56     {
  57         return (m_colormap == data.m_colormap &&
  58                 m_hasPixel == data.m_hasPixel &&
  59                 m_color.red == data.m_color.red &&
  60                 m_color.green == data.m_color.green &&
  61                 m_color.blue == data.m_color.blue &&
  62                 m_color.pixel == data.m_color.pixel);
  63     }
  64
  65     void FreeColour();
  66     void AllocColour( GdkColormap* cmap );
  67
  68     GdkColor     m_color;
  69     GdkColormap *m_colormap;
  70     bool         m_hasPixel;
  71
  72     friend class wxColour;
  73
  74     // reference counter for systems with <= 8-Bit display
  75     static gushort colMapAllocCounter[ 256 ];
  76 };
  77
  78 gushort wxColourRefData::colMapAllocCounter[ 256 ] =
  79 {
  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, 0, 0, 0, 0,
  89   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  90   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  91   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  92   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
  93 };
  94
  95 void wxColourRefData::FreeColour()
  96 {
  97     if (m_colormap)
  98     {
  99         GdkColormapPrivate *private_colormap = (GdkColormapPrivate*) m_colormap;
 100         if ((private_colormap->visual->type == GDK_VISUAL_GRAYSCALE) ||
 101             (private_colormap->visual->type == GDK_VISUAL_PSEUDO_COLOR))
 102         {
 103             int idx = m_color.pixel;
 104             colMapAllocCounter[ idx ] = colMapAllocCounter[ idx ] - 1;
 105
 106             if (colMapAllocCounter[ idx ] == 0)
 107                 gdk_colormap_free_colors( m_colormap, &m_color, 1 );
 108         }
 109     }
 110 }
 111
 112 void wxColourRefData::AllocColour( GdkColormap *cmap )
 113 {
 114     if (m_hasPixel && (m_colormap == cmap))
 115         return;
 116
 117     FreeColour();
 118
 119     GdkColormapPrivate *private_colormap = (GdkColormapPrivate*) cmap;
 120     if ((private_colormap->visual->type == GDK_VISUAL_GRAYSCALE) ||
 121         (private_colormap->visual->type == GDK_VISUAL_PSEUDO_COLOR))
 122     {
 123         m_hasPixel = gdk_colormap_alloc_color( cmap, &m_color, FALSE, TRUE );
 124         int idx = m_color.pixel;
 125         colMapAllocCounter[ idx ] = colMapAllocCounter[ idx ] + 1;
 126     }
 127     else
 128     {
 129         m_hasPixel = gdk_color_alloc( cmap, &m_color );
 130     }
 131     m_colormap = cmap;
 132 }
 133
 134 //-----------------------------------------------------------------------------
 135
 136 #define M_COLDATA ((wxColourRefData *)m_refData)
 137
 138 // GDK's values are in 0..65535 range, our are in 0..255
 139 #define SHIFT  8
 140
 141 IMPLEMENT_DYNAMIC_CLASS(wxColour,wxGDIObject)
 142
 143 wxColour::~wxColour()
 144 {
 145 }
 146
 147 bool wxColour::operator == ( const wxColour& col ) const
 148 {
 149     if (m_refData == col.m_refData)
 150         return true;
 151
 152     if (!m_refData || !col.m_refData)
 153         return false;
 154
 155     GdkColor *own = &(((wxColourRefData*)m_refData)->m_color);
 156     GdkColor *other = &(((wxColourRefData*)col.m_refData)->m_color);
 157     return own->red == other->red &&
 158                 own->blue == other->blue &&
 159                      own->green == other->green;
 160 }
 161
 162 wxObjectRefData *wxColour::CreateRefData() const
 163 {
 164     return new wxColourRefData;
 165 }
 166
 167 wxObjectRefData *wxColour::CloneRefData(const wxObjectRefData *data) const
 168 {
 169     return new wxColourRefData(*(wxColourRefData *)data);
 170 }
 171
 172 void wxColour::InitRGBA(unsigned char red, unsigned char green, unsigned char blue,
 173                         unsigned char WXUNUSED(alpha))
 174 {
 175     AllocExclusive();
 176
 177     M_COLDATA->m_color.red = ((unsigned short)red) << SHIFT;
 178     M_COLDATA->m_color.green = ((unsigned short)green) << SHIFT;
 179     M_COLDATA->m_color.blue = ((unsigned short)blue) << SHIFT;
 180     M_COLDATA->m_color.pixel = 0;
 181
 182     M_COLDATA->m_colormap = (GdkColormap*) NULL;
 183     M_COLDATA->m_hasPixel = false;
 184 }
 185
 186 unsigned char wxColour::Red() const
 187 {
 188     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 189
 190     return (unsigned char)(M_COLDATA->m_color.red >> SHIFT);
 191 }
 192
 193 unsigned char wxColour::Green() const
 194 {
 195     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 196
 197     return (unsigned char)(M_COLDATA->m_color.green >> SHIFT);
 198 }
 199
 200 unsigned char wxColour::Blue() const
 201 {
 202     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 203
 204     return (unsigned char)(M_COLDATA->m_color.blue >> SHIFT);
 205 }
 206
 207 void wxColour::CalcPixel( GdkColormap *cmap )
 208 {
 209     if (!Ok()) return;
 210
 211     M_COLDATA->AllocColour( cmap );
 212 }
 213
 214 int wxColour::GetPixel() const
 215 {
 216     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 217
 218     return M_COLDATA->m_color.pixel;
 219 }
 220
 221 GdkColor *wxColour::GetColor() const
 222 {
 223     wxCHECK_MSG( Ok(), (GdkColor *) NULL, wxT("invalid colour") );
 224
 225     return &M_COLDATA->m_color;
 226 }
 227
 228 bool wxColour::FromString(const wxString& str)
 229 {
 230     GdkColor colGDK;
 231     if ( gdk_color_parse( wxGTK_CONV(str), &colGDK ) )
 232     {
 233         UnRef();
 234
 235         m_refData = new wxColourRefData;
 236         M_COLDATA->m_color = colGDK;
 237         return true;
 238     }
 239
 240     return wxColourBase::FromString(str);
 241 }