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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 #include "wx/gdicmn.h"
15 #include "wx/gtk1/private.h"
16
17 #include <gdk/gdk.h>
18 #include <gdk/gdkx.h>
19 #include <gdk/gdkprivate.h>
20
21 //-----------------------------------------------------------------------------
22 // wxColour
23 //-----------------------------------------------------------------------------
24
25 class wxColourRefData: public wxObjectRefData
26 {
27 public:
28 wxColourRefData()
29 {
30 m_color.red = 0;
31 m_color.green = 0;
32 m_color.blue = 0;
33 m_color.pixel = 0;
34 m_colormap = (GdkColormap *) NULL;
35 m_hasPixel = false;
36 }
37
38 wxColourRefData(const wxColourRefData& data)
39 : wxObjectRefData()
40 {
41 m_color = data.m_color;
42 m_colormap = data.m_colormap;
43 m_hasPixel = data.m_hasPixel;
44 }
45
46 ~wxColourRefData()
47 {
48 FreeColour();
49 }
50
51 bool operator == (const wxColourRefData& data) const
52 {
53 return (m_colormap == data.m_colormap &&
54 m_hasPixel == data.m_hasPixel &&
55 m_color.red == data.m_color.red &&
56 m_color.green == data.m_color.green &&
57 m_color.blue == data.m_color.blue &&
58 m_color.pixel == data.m_color.pixel);
59 }
60
61 void FreeColour();
62 void AllocColour( GdkColormap* cmap );
63
64 GdkColor m_color;
65 GdkColormap *m_colormap;
66 bool m_hasPixel;
67
68 friend class wxColour;
69
70 // reference counter for systems with <= 8-Bit display
71 static gushort colMapAllocCounter[ 256 ];
72 };
73
74 gushort wxColourRefData::colMapAllocCounter[ 256 ] =
75 {
76 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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
89 };
90
91 void wxColourRefData::FreeColour()
92 {
93 if (m_colormap)
94 {
95 GdkColormapPrivate *private_colormap = (GdkColormapPrivate*) m_colormap;
96 if ((private_colormap->visual->type == GDK_VISUAL_GRAYSCALE) ||
97 (private_colormap->visual->type == GDK_VISUAL_PSEUDO_COLOR))
98 {
99 int idx = m_color.pixel;
100 colMapAllocCounter[ idx ] = colMapAllocCounter[ idx ] - 1;
101
102 if (colMapAllocCounter[ idx ] == 0)
103 gdk_colormap_free_colors( m_colormap, &m_color, 1 );
104 }
105 }
106 }
107
108 void wxColourRefData::AllocColour( GdkColormap *cmap )
109 {
110 if (m_hasPixel && (m_colormap == cmap))
111 return;
112
113 FreeColour();
114
115 GdkColormapPrivate *private_colormap = (GdkColormapPrivate*) cmap;
116 if ((private_colormap->visual->type == GDK_VISUAL_GRAYSCALE) ||
117 (private_colormap->visual->type == GDK_VISUAL_PSEUDO_COLOR))
118 {
119 m_hasPixel = gdk_colormap_alloc_color( cmap, &m_color, FALSE, TRUE );
120 int idx = m_color.pixel;
121 colMapAllocCounter[ idx ] = colMapAllocCounter[ idx ] + 1;
122 }
123 else
124 {
125 m_hasPixel = gdk_color_alloc( cmap, &m_color );
126 }
127 m_colormap = cmap;
128 }
129
130 //-----------------------------------------------------------------------------
131
132 #define M_COLDATA ((wxColourRefData *)m_refData)
133
134 // GDK's values are in 0..65535 range, our are in 0..255
135 #define SHIFT 8
136
137 IMPLEMENT_DYNAMIC_CLASS(wxColour,wxGDIObject)
138
139 wxColour::wxColour( unsigned char red, unsigned char green, unsigned char blue )
140 {
141 m_refData = new wxColourRefData();
142 M_COLDATA->m_color.red = ((unsigned short)red) << SHIFT;
143 M_COLDATA->m_color.green = ((unsigned short)green) << SHIFT;
144 M_COLDATA->m_color.blue = ((unsigned short)blue) << SHIFT;
145 M_COLDATA->m_color.pixel = 0;
146 }
147
148 /* static */
149 wxColour wxColour::CreateByName(const wxString& name)
150 {
151 wxColour col;
152
153 GdkColor colGDK;
154 if ( gdk_color_parse( wxGTK_CONV( name ), &colGDK ) )
155 {
156 wxColourRefData *refData = new wxColourRefData;
157 refData->m_color = colGDK;
158 col.m_refData = refData;
159 }
160
161 return col;
162 }
163
164
165 void wxColour::InitFromName( const wxString &colourName )
166 {
167 // check the cache first
168 wxColour col;
169 if ( wxTheColourDatabase )
170 {
171 col = wxTheColourDatabase->Find(colourName);
172 }
173
174 if ( !col.Ok() )
175 {
176 col = CreateByName(colourName);
177 }
178
179 if ( col.Ok() )
180 {
181 *this = col;
182 }
183 else
184 {
185 wxFAIL_MSG( wxT("wxColour: couldn't find colour") );
186 }
187 }
188
189 wxColour::~wxColour()
190 {
191 }
192
193 bool wxColour::operator == ( const wxColour& col ) const
194 {
195 if (m_refData == col.m_refData)
196 return true;
197
198 if (!m_refData || !col.m_refData)
199 return false;
200
201 GdkColor *own = &(((wxColourRefData*)m_refData)->m_color);
202 GdkColor *other = &(((wxColourRefData*)col.m_refData)->m_color);
203 return own->red == other->red &&
204 own->blue == other->blue &&
205 own->green == other->green;
206 }
207
208 wxObjectRefData *wxColour::CreateRefData() const
209 {
210 return new wxColourRefData;
211 }
212
213 wxObjectRefData *wxColour::CloneRefData(const wxObjectRefData *data) const
214 {
215 return new wxColourRefData(*(wxColourRefData *)data);
216 }
217
218 void wxColour::Set( unsigned char red, unsigned char green, unsigned char blue )
219 {
220 AllocExclusive();
221
222 M_COLDATA->m_color.red = ((unsigned short)red) << SHIFT;
223 M_COLDATA->m_color.green = ((unsigned short)green) << SHIFT;
224 M_COLDATA->m_color.blue = ((unsigned short)blue) << SHIFT;
225 M_COLDATA->m_color.pixel = 0;
226
227 M_COLDATA->m_colormap = (GdkColormap*) NULL;
228 M_COLDATA->m_hasPixel = false;
229 }
230
231 unsigned char wxColour::Red() const
232 {
233 wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
234
235 return (unsigned char)(M_COLDATA->m_color.red >> SHIFT);
236 }
237
238 unsigned char wxColour::Green() const
239 {
240 wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
241
242 return (unsigned char)(M_COLDATA->m_color.green >> SHIFT);
243 }
244
245 unsigned char wxColour::Blue() const
246 {
247 wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
248
249 return (unsigned char)(M_COLDATA->m_color.blue >> SHIFT);
250 }
251
252 void wxColour::CalcPixel( GdkColormap *cmap )
253 {
254 if (!Ok()) return;
255
256 M_COLDATA->AllocColour( cmap );
257 }
258
259 int wxColour::GetPixel() const
260 {
261 wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
262
263 return M_COLDATA->m_color.pixel;
264 }
265
266 GdkColor *wxColour::GetColor() const
267 {
268 wxCHECK_MSG( Ok(), (GdkColor *) NULL, wxT("invalid colour") );
269
270 return &M_COLDATA->m_color;
271 }