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 wxGDIRefData
  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 = NULL;
  39         m_hasPixel = false;
  40     }
  41
  42     wxColourRefData(const wxColourRefData& data)
  43     {
  44         m_color = data.m_color;
  45         m_colormap = data.m_colormap;
  46         m_hasPixel = data.m_hasPixel;
  47     }
  48
  49     virtual ~wxColourRefData()
  50     {
  51         FreeColour();
  52     }
  53
  54     bool operator == (const wxColourRefData& data) const
  55     {
  56         return (m_colormap == data.m_colormap &&
  57                 m_hasPixel == data.m_hasPixel &&
  58                 m_color.red == data.m_color.red &&
  59                 m_color.green == data.m_color.green &&
  60                 m_color.blue == data.m_color.blue &&
  61                 m_color.pixel == data.m_color.pixel);
  62     }
  63
  64     void FreeColour();
  65     void AllocColour( GdkColormap* cmap );
  66
  67     GdkColor     m_color;
  68     GdkColormap *m_colormap;
  69     bool         m_hasPixel;
  70
  71     friend class wxColour;
  72
  73     // reference counter for systems with <= 8-Bit display
  74     static gushort colMapAllocCounter[ 256 ];
  75 };
  76
  77 gushort wxColourRefData::colMapAllocCounter[ 256 ] =
  78 {
  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, 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
  92 };
  93
  94 void wxColourRefData::FreeColour()
  95 {
  96     if (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 }
 110
 111 void wxColourRefData::AllocColour( GdkColormap *cmap )
 112 {
 113     if (m_hasPixel && (m_colormap == cmap))
 114         return;
 115
 116     FreeColour();
 117
 118     GdkColormapPrivate *private_colormap = (GdkColormapPrivate*) cmap;
 119     if ((private_colormap->visual->type == GDK_VISUAL_GRAYSCALE) ||
 120         (private_colormap->visual->type == GDK_VISUAL_PSEUDO_COLOR))
 121     {
 122         m_hasPixel = gdk_colormap_alloc_color( cmap, &m_color, FALSE, TRUE );
 123         int idx = m_color.pixel;
 124         colMapAllocCounter[ idx ] = colMapAllocCounter[ idx ] + 1;
 125     }
 126     else
 127     {
 128         m_hasPixel = gdk_color_alloc( cmap, &m_color );
 129     }
 130     m_colormap = cmap;
 131 }
 132
 133 //-----------------------------------------------------------------------------
 134
 135 #define M_COLDATA ((wxColourRefData *)m_refData)
 136
 137 // GDK's values are in 0..65535 range, our are in 0..255
 138 #define SHIFT  8
 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 wxGDIRefData *wxColour::CreateGDIRefData() const
 160 {
 161     return new wxColourRefData;
 162 }
 163
 164 wxGDIRefData *wxColour::CloneGDIRefData(const wxGDIRefData *data) const
 165 {
 166     return new wxColourRefData(*(wxColourRefData *)data);
 167 }
 168
 169 void wxColour::InitRGBA(unsigned char red, unsigned char green, unsigned char blue,
 170                         unsigned char WXUNUSED(alpha))
 171 {
 172     AllocExclusive();
 173
 174     M_COLDATA->m_color.red = ((unsigned short)red) << SHIFT;
 175     M_COLDATA->m_color.green = ((unsigned short)green) << SHIFT;
 176     M_COLDATA->m_color.blue = ((unsigned short)blue) << SHIFT;
 177     M_COLDATA->m_color.pixel = 0;
 178
 179     M_COLDATA->m_colormap = NULL;
 180     M_COLDATA->m_hasPixel = false;
 181 }
 182
 183 unsigned char wxColour::Red() const
 184 {
 185     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 186
 187     return (unsigned char)(M_COLDATA->m_color.red >> SHIFT);
 188 }
 189
 190 unsigned char wxColour::Green() const
 191 {
 192     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 193
 194     return (unsigned char)(M_COLDATA->m_color.green >> SHIFT);
 195 }
 196
 197 unsigned char wxColour::Blue() const
 198 {
 199     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 200
 201     return (unsigned char)(M_COLDATA->m_color.blue >> SHIFT);
 202 }
 203
 204 void wxColour::CalcPixel( GdkColormap *cmap )
 205 {
 206     if (!Ok()) return;
 207
 208     M_COLDATA->AllocColour( cmap );
 209 }
 210
 211 int wxColour::GetPixel() const
 212 {
 213     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 214
 215     return M_COLDATA->m_color.pixel;
 216 }
 217
 218 GdkColor *wxColour::GetColor() const
 219 {
 220     wxCHECK_MSG( Ok(), NULL, wxT("invalid colour") );
 221
 222     return &M_COLDATA->m_color;
 223 }
 224
 225 bool wxColour::FromString(const wxString& str)
 226 {
 227     GdkColor colGDK;
 228     if ( gdk_color_parse( wxGTK_CONV(str), &colGDK ) )
 229     {
 230         UnRef();
 231
 232         m_refData = new wxColourRefData;
 233         M_COLDATA->m_color = colGDK;
 234         return true;
 235     }
 236
 237     return wxColourBase::FromString(str);
 238 }