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