src/gtk1/colour.cpp

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