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1 /////////////////////////////////////////////////////////////////////////////
2 // Name: colour.cpp
3 // Purpose:
4 // Author: Robert Roebling
5 // Id: $Id$
6 // Copyright: (c) 1998 Robert Roebling
7 // Licence: wxWindows licence
8 /////////////////////////////////////////////////////////////////////////////
9
10
11 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
12 #pragma implementation "colour.h"
13 #endif
14
15 // For compilers that support precompilation, includes "wx.h".
16 #include "wx/wxprec.h"
17
18 #include "wx/gdicmn.h"
19 #include "wx/colour.h"
20 #include "wx/gtk/private.h"
21
22 #include <gdk/gdk.h>
23 #include <gdk/gdkx.h>
24 #include <gdk/gdkprivate.h>
25
26 //-----------------------------------------------------------------------------
27 // wxColour
28 //-----------------------------------------------------------------------------
29
30 class wxColourRefData: public wxObjectRefData
31 {
32 public:
33 wxColourRefData()
34 {
35 m_color.red = 0;
36 m_color.green = 0;
37 m_color.blue = 0;
38 m_color.pixel = 0;
39 m_colormap = (GdkColormap *) NULL;
40 m_hasPixel = FALSE;
41 }
42
43 wxColourRefData(const wxColourRefData& data)
44 : wxObjectRefData()
45 {
46 m_color = data.m_color;
47 m_colormap = data.m_colormap;
48 m_hasPixel = data.m_hasPixel;
49 }
50
51 ~wxColourRefData()
52 {
53 FreeColour();
54 }
55
56 bool operator == (const wxColourRefData& data) const
57 {
58 return (m_colormap == data.m_colormap &&
59 m_hasPixel == data.m_hasPixel &&
60 m_color.red == data.m_color.red &&
61 m_color.green == data.m_color.green &&
62 m_color.blue == data.m_color.blue &&
63 m_color.pixel == data.m_color.pixel);
64 }
65
66 void FreeColour();
67 void AllocColour( GdkColormap* cmap );
68
69 GdkColor m_color;
70 GdkColormap *m_colormap;
71 bool m_hasPixel;
72
73 friend class wxColour;
74
75 // reference counter for systems with <= 8-Bit display
76 static gushort colMapAllocCounter[ 256 ];
77 };
78
79 gushort wxColourRefData::colMapAllocCounter[ 256 ] =
80 {
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, 0, 0, 0, 0,
93 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
94 };
95
96 void wxColourRefData::FreeColour()
97 {
98 if (m_colormap)
99 {
100 #ifdef __WXGTK20__
101 if ((m_colormap->visual->type == GDK_VISUAL_GRAYSCALE) ||
102 (m_colormap->visual->type == GDK_VISUAL_PSEUDO_COLOR))
103 #else
104 GdkColormapPrivate *private_colormap = (GdkColormapPrivate*) m_colormap;
105 if ((private_colormap->visual->type == GDK_VISUAL_GRAYSCALE) ||
106 (private_colormap->visual->type == GDK_VISUAL_PSEUDO_COLOR))
107 #endif
108 {
109 int idx = m_color.pixel;
110 colMapAllocCounter[ idx ] = colMapAllocCounter[ idx ] - 1;
111
112 if (colMapAllocCounter[ idx ] == 0)
113 gdk_colormap_free_colors( m_colormap, &m_color, 1 );
114 }
115 }
116 }
117
118 void wxColourRefData::AllocColour( GdkColormap *cmap )
119 {
120 if (m_hasPixel && (m_colormap == cmap))
121 return;
122
123 FreeColour();
124
125 #ifdef __WXGTK20__
126 if ( (cmap->visual->type == GDK_VISUAL_GRAYSCALE) ||
127 (cmap->visual->type == GDK_VISUAL_PSEUDO_COLOR) )
128 #else
129 GdkColormapPrivate *private_colormap = (GdkColormapPrivate*) cmap;
130 if ((private_colormap->visual->type == GDK_VISUAL_GRAYSCALE) ||
131 (private_colormap->visual->type == GDK_VISUAL_PSEUDO_COLOR))
132 #endif
133 {
134 m_hasPixel = gdk_colormap_alloc_color( cmap, &m_color, FALSE, TRUE );
135 int idx = m_color.pixel;
136 colMapAllocCounter[ idx ] = colMapAllocCounter[ idx ] + 1;
137 }
138 else
139 {
140 m_hasPixel = gdk_color_alloc( cmap, &m_color );
141 }
142 m_colormap = cmap;
143 }
144
145 //-----------------------------------------------------------------------------
146
147 #define M_COLDATA ((wxColourRefData *)m_refData)
148
149 #define SHIFT (8*(sizeof(short int)-sizeof(char)))
150
151 IMPLEMENT_DYNAMIC_CLASS(wxColour,wxGDIObject)
152
153 wxColour::wxColour( unsigned char red, unsigned char green, unsigned char blue )
154 {
155 m_refData = new wxColourRefData();
156 M_COLDATA->m_color.red = ((unsigned short)red) << SHIFT;
157 M_COLDATA->m_color.green = ((unsigned short)green) << SHIFT;
158 M_COLDATA->m_color.blue = ((unsigned short)blue) << SHIFT;
159 M_COLDATA->m_color.pixel = 0;
160 }
161
162
163
164 void wxColour::InitFromName( const wxString &colourName )
165 {
166 wxColour* col = NULL;
167 if ( (wxTheColourDatabase) && (col = wxTheColourDatabase->FindColourNoAdd(colourName)) )
168 {
169 UnRef();
170 if (col) Ref( *col );
171 }
172 else
173 {
174 m_refData = new wxColourRefData();
175
176 if (!gdk_color_parse( wxGTK_CONV( colourName ), &M_COLDATA->m_color ))
177 {
178 // VZ: asserts are good in general but this one is triggered by
179 // calling wxColourDatabase::FindColour() with an
180 // unrecognized colour name and this can't be avoided from the
181 // user code, so don't give it here
182 //
183 // a better solution would be to changed code in FindColour()
184
185 //wxFAIL_MSG( wxT("wxColour: couldn't find colour") );
186
187 delete m_refData;
188 m_refData = (wxObjectRefData *) NULL;
189 }
190 }
191 }
192
193 wxColour::~wxColour()
194 {
195 }
196
197 bool wxColour::operator == ( const wxColour& col ) const
198 {
199 if (m_refData == col.m_refData) return TRUE;
200
201 if (!m_refData || !col.m_refData) return FALSE;
202
203 GdkColor *own = &(((wxColourRefData*)m_refData)->m_color);
204 GdkColor *other = &(((wxColourRefData*)col.m_refData)->m_color);
205 if (own->red != other->red) return FALSE;
206 if (own->blue != other->blue) return FALSE;
207 if (own->green != other->green) return FALSE;
208
209 return TRUE;
210 }
211
212 wxObjectRefData *wxColour::CreateRefData() const
213 {
214 return new wxColourRefData;
215 }
216
217 wxObjectRefData *wxColour::CloneRefData(const wxObjectRefData *data) const
218 {
219 return new wxColourRefData(*(wxColourRefData *)data);
220 }
221
222 void wxColour::Set( unsigned char red, unsigned char green, unsigned char blue )
223 {
224 AllocExclusive();
225
226 M_COLDATA->m_color.red = ((unsigned short)red) << SHIFT;
227 M_COLDATA->m_color.green = ((unsigned short)green) << SHIFT;
228 M_COLDATA->m_color.blue = ((unsigned short)blue) << SHIFT;
229 M_COLDATA->m_color.pixel = 0;
230
231 M_COLDATA->m_colormap = (GdkColormap*) NULL;
232 M_COLDATA->m_hasPixel = FALSE;
233 }
234
235 unsigned char wxColour::Red() const
236 {
237 wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
238
239 return (unsigned char)(M_COLDATA->m_color.red >> SHIFT);
240 }
241
242 unsigned char wxColour::Green() const
243 {
244 wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
245
246 return (unsigned char)(M_COLDATA->m_color.green >> SHIFT);
247 }
248
249 unsigned char wxColour::Blue() const
250 {
251 wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
252
253 return (unsigned char)(M_COLDATA->m_color.blue >> SHIFT);
254 }
255
256 void wxColour::CalcPixel( GdkColormap *cmap )
257 {
258 if (!Ok()) return;
259
260 M_COLDATA->AllocColour( cmap );
261 }
262
263 int wxColour::GetPixel() const
264 {
265 wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
266
267 return M_COLDATA->m_color.pixel;
268 }
269
270 GdkColor *wxColour::GetColor() const
271 {
272 wxCHECK_MSG( Ok(), (GdkColor *) NULL, wxT("invalid colour") );
273
274 return &M_COLDATA->m_color;
275 }
276
277