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1 /////////////////////////////////////////////////////////////////////////////
2 // Name: src/x11/colour.cpp
3 // Purpose: wxColour class
4 // Author: Julian Smart, Robert Roebling
5 // Modified by:
6 // Created: 17/09/98
7 // RCS-ID: $Id$
8 // Copyright: (c) Julian Smart, Robert Roebling
9 // Licence: wxWindows licence
10 /////////////////////////////////////////////////////////////////////////////
11
12 // For compilers that support precompilation, includes "wx.h".
13 #include "wx/wxprec.h"
14
15 #include "wx/colour.h"
16
17 #ifndef WX_PRECOMP
18 #include "wx/app.h"
19 #include "wx/gdicmn.h"
20 #endif
21
22 #include "wx/x11/private.h"
23
24 //-----------------------------------------------------------------------------
25 // wxColour
26 //-----------------------------------------------------------------------------
27
28 class wxColourRefData: public wxObjectRefData
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 = (WXColormap *) NULL;
38 m_hasPixel = false;
39 }
40 wxColourRefData(const wxColourRefData& data):
41 wxObjectRefData()
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( WXColormap cmap );
65
66 XColor m_color;
67 WXColormap m_colormap;
68 bool m_hasPixel;
69
70 friend class wxColour;
71
72 // reference counter for systems with <= 8-Bit display
73 static unsigned short colMapAllocCounter[ 256 ];
74 };
75
76 unsigned short 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 return;
97 #if !wxUSE_NANOX
98 if ( wxTheApp &&
99 (wxTheApp->m_visualInfo->m_visualType == GrayScale ||
100 wxTheApp->m_visualInfo->m_visualType == PseudoColor) )
101 {
102 int idx = m_color.pixel;
103 colMapAllocCounter[ idx ] = colMapAllocCounter[ idx ] - 1;
104
105 if (colMapAllocCounter[ idx ] == 0)
106 {
107 unsigned long pixel = m_color.pixel;
108 XFreeColors( wxGlobalDisplay(), (Colormap) m_colormap, &pixel, 1, 0 );
109 }
110 }
111 #endif
112 }
113
114 void wxColourRefData::AllocColour( WXColormap cmap )
115 {
116 if (m_hasPixel && (m_colormap == cmap))
117 return;
118
119 FreeColour();
120
121 #if !wxUSE_NANOX
122 if ((wxTheApp->m_visualInfo->m_visualType == GrayScale) ||
123 (wxTheApp->m_visualInfo->m_visualType == PseudoColor))
124 {
125 m_hasPixel = XAllocColor( wxGlobalDisplay(), (Colormap) cmap, &m_color );
126 int idx = m_color.pixel;
127 colMapAllocCounter[ idx ] = colMapAllocCounter[ idx ] + 1;
128 }
129 else
130 #endif
131 {
132 m_hasPixel = XAllocColor( wxGlobalDisplay(), (Colormap) cmap, &m_color );
133 }
134
135 m_colormap = cmap;
136 }
137
138 //-----------------------------------------------------------------------------
139
140 #define M_COLDATA ((wxColourRefData *)m_refData)
141
142 #define SHIFT (8*(sizeof(short int)-sizeof(char)))
143
144 IMPLEMENT_DYNAMIC_CLASS(wxColour,wxGDIObject)
145
146 wxColour::~wxColour()
147 {
148 }
149
150 bool wxColour::operator == ( const wxColour& col ) const
151 {
152 if (m_refData == col.m_refData) return true;
153
154 if (!m_refData || !col.m_refData) return false;
155
156 XColor *own = &(((wxColourRefData*)m_refData)->m_color);
157 XColor *other = &(((wxColourRefData*)col.m_refData)->m_color);
158
159 return (own->red == other->red)
160 && (own->green == other->green)
161 && (own->blue == other->blue) ;
162
163 }
164
165 wxObjectRefData *wxColour::CreateRefData() const
166 {
167 return new wxColourRefData;
168 }
169
170 wxObjectRefData *wxColour::CloneRefData(const wxObjectRefData *data) const
171 {
172 return new wxColourRefData(*(wxColourRefData *)data);
173 }
174
175 void wxColour::InitRGBA(unsigned char red, unsigned char green, unsigned char blue,
176 unsigned char WXUNUSED(alpha))
177 {
178 AllocExclusive();
179
180 #if wxUSE_NANOX
181 M_COLDATA->m_color.red = ((unsigned short)red) ;
182 M_COLDATA->m_color.green = ((unsigned short)green) ;
183 M_COLDATA->m_color.blue = ((unsigned short)blue) ;
184 #else
185 M_COLDATA->m_color.red = ((unsigned short)red) << SHIFT;
186 M_COLDATA->m_color.green = ((unsigned short)green) << SHIFT;
187 M_COLDATA->m_color.blue = ((unsigned short)blue) << SHIFT;
188 #endif
189 M_COLDATA->m_color.pixel = 0;
190 }
191
192 unsigned char wxColour::Red() const
193 {
194 wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
195
196 #if wxUSE_NANOX
197 return (unsigned char) M_COLDATA->m_color.red ;
198 #else
199 return (unsigned char)(M_COLDATA->m_color.red >> SHIFT);
200 #endif
201 }
202
203 unsigned char wxColour::Green() const
204 {
205 wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
206
207 #if wxUSE_NANOX
208 return (unsigned char) M_COLDATA->m_color.green ;
209 #else
210 return (unsigned char)(M_COLDATA->m_color.green >> SHIFT);
211 #endif
212 }
213
214 unsigned char wxColour::Blue() const
215 {
216 wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
217
218 #if wxUSE_NANOX
219 return (unsigned char) M_COLDATA->m_color.blue ;
220 #else
221 return (unsigned char)(M_COLDATA->m_color.blue >> SHIFT);
222 #endif
223 }
224
225 void wxColour::CalcPixel( WXColormap cmap )
226 {
227 wxCHECK_RET( Ok(), wxT("invalid colour") );
228
229 wxCHECK_RET( cmap, wxT("invalid colormap") );
230
231 M_COLDATA->AllocColour( cmap );
232 }
233
234 unsigned long wxColour::GetPixel() const
235 {
236 wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
237
238 return M_COLDATA->m_color.pixel;
239 }
240
241 WXColor *wxColour::GetColor() const
242 {
243 wxCHECK_MSG( Ok(), (WXColor *) NULL, wxT("invalid colour") );
244
245 return (WXColor*) &M_COLDATA->m_color;
246 }
247
248 bool wxColour::FromString(const wxChar *name)
249 {
250 Display *dpy = wxGlobalDisplay();
251 WXColormap colormap = wxTheApp->GetMainColormap( dpy );
252 XColor xcol;
253 if ( XParseColor( dpy, (Colormap)colormap, wxConvertWX2MB(name), &xcol ) )
254 {
255 UnRef();
256
257 m_refData = new wxColourRefData;
258 M_COLDATA->m_colormap = colormap;
259 M_COLDATA->m_color = xcol;
260 return true;
261 }
262
263 return wxColourBase::FromString(name);
264 }