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 = (GdkColormap *) 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 IMPLEMENT_DYNAMIC_CLASS(wxColour,wxGDIObject)
 141
 142 wxColour::~wxColour()
 143 {
 144 }
 145
 146 bool wxColour::operator == ( const wxColour& col ) const
 147 {
 148     if (m_refData == col.m_refData)
 149         return true;
 150
 151     if (!m_refData || !col.m_refData)
 152         return false;
 153
 154     GdkColor *own = &(((wxColourRefData*)m_refData)->m_color);
 155     GdkColor *other = &(((wxColourRefData*)col.m_refData)->m_color);
 156     return own->red == other->red &&
 157                 own->blue == other->blue &&
 158                      own->green == other->green;
 159 }
 160
 161 wxGDIRefData *wxColour::CreateGDIRefData() const
 162 {
 163     return new wxColourRefData;
 164 }
 165
 166 wxGDIRefData *wxColour::CloneGDIRefData(const wxGDIRefData *data) const
 167 {
 168     return new wxColourRefData(*(wxColourRefData *)data);
 169 }
 170
 171 void wxColour::InitRGBA(unsigned char red, unsigned char green, unsigned char blue,
 172                         unsigned char WXUNUSED(alpha))
 173 {
 174     AllocExclusive();
 175
 176     M_COLDATA->m_color.red = ((unsigned short)red) << SHIFT;
 177     M_COLDATA->m_color.green = ((unsigned short)green) << SHIFT;
 178     M_COLDATA->m_color.blue = ((unsigned short)blue) << SHIFT;
 179     M_COLDATA->m_color.pixel = 0;
 180
 181     M_COLDATA->m_colormap = (GdkColormap*) NULL;
 182     M_COLDATA->m_hasPixel = false;
 183 }
 184
 185 unsigned char wxColour::Red() const
 186 {
 187     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 188
 189     return (unsigned char)(M_COLDATA->m_color.red >> SHIFT);
 190 }
 191
 192 unsigned char wxColour::Green() const
 193 {
 194     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 195
 196     return (unsigned char)(M_COLDATA->m_color.green >> SHIFT);
 197 }
 198
 199 unsigned char wxColour::Blue() const
 200 {
 201     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 202
 203     return (unsigned char)(M_COLDATA->m_color.blue >> SHIFT);
 204 }
 205
 206 void wxColour::CalcPixel( GdkColormap *cmap )
 207 {
 208     if (!Ok()) return;
 209
 210     M_COLDATA->AllocColour( cmap );
 211 }
 212
 213 int wxColour::GetPixel() const
 214 {
 215     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 216
 217     return M_COLDATA->m_color.pixel;
 218 }
 219
 220 GdkColor *wxColour::GetColor() const
 221 {
 222     wxCHECK_MSG( Ok(), (GdkColor *) NULL, wxT("invalid colour") );
 223
 224     return &M_COLDATA->m_color;
 225 }
 226
 227 bool wxColour::FromString(const wxString& str)
 228 {
 229     GdkColor colGDK;
 230     if ( gdk_color_parse( wxGTK_CONV(str), &colGDK ) )
 231     {
 232         UnRef();
 233
 234         m_refData = new wxColourRefData;
 235         M_COLDATA->m_color = colGDK;
 236         return true;
 237     }
 238
 239     return wxColourBase::FromString(str);
 240 }