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fix for a fatal bug in wxMGL's wxDir
[wxWidgets.git] / src / gtk1 / colour.cpp
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1/////////////////////////////////////////////////////////////////////////////
2// Name: colour.cpp
3// Purpose:
4// Author: Robert Roebling
dbf858b5
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5// Id: $Id$
6// Copyright: (c) 1998 Robert Roebling
8bbe427f 7// Licence: wxWindows licence
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8/////////////////////////////////////////////////////////////////////////////
9
10
11#ifdef __GNUG__
12#pragma implementation "colour.h"
13#endif
14
15#include "wx/gdicmn.h"
16
071a2d78 17#include <gdk/gdk.h>
307fc8d5 18#include <gdk/gdkx.h>
071a2d78 19#include <gdk/gdkprivate.h>
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20
21//-----------------------------------------------------------------------------
22// wxColour
23//-----------------------------------------------------------------------------
24
25class wxColourRefData: public wxObjectRefData
26{
47c93b63 27public:
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28 wxColourRefData();
29 ~wxColourRefData();
15248e43 30
68dda785 31 void FreeColour();
d13fd3e4 32 void AllocColour( GdkColormap* cmap );
8bbe427f 33
47c93b63 34public:
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35 GdkColor m_color;
36 GdkColormap *m_colormap;
37 bool m_hasPixel;
8bbe427f 38
f6bcfd97 39 friend class wxColour;
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40
41 // reference counter for systems with <= 8-Bit display
42 static gushort colMapAllocCounter[ 256 ];
43};
44
45gushort wxColourRefData::colMapAllocCounter[ 256 ] =
46{
47 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
48 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
49 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
50 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
51 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
52 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
53 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
54 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
55 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
56 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
57 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
58 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
59 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
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60};
61
68dda785 62wxColourRefData::wxColourRefData()
c801d85f 63{
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64 m_color.red = 0;
65 m_color.green = 0;
66 m_color.blue = 0;
67 m_color.pixel = 0;
68 m_colormap = (GdkColormap *) NULL;
69 m_hasPixel = FALSE;
ff7b1510 70}
c801d85f 71
68dda785 72wxColourRefData::~wxColourRefData()
c801d85f 73{
1ecc4d80 74 FreeColour();
ff7b1510 75}
c801d85f 76
68dda785 77void wxColourRefData::FreeColour()
c801d85f 78{
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79 if (m_colormap)
80 {
81#ifdef __WXGTK20__
82 if ((m_colormap->visual->type == GDK_VISUAL_GRAYSCALE) ||
83 (m_colormap->visual->type == GDK_VISUAL_PSEUDO_COLOR))
84#else
85 GdkColormapPrivate *private_colormap = (GdkColormapPrivate*) m_colormap;
86 if ((private_colormap->visual->type == GDK_VISUAL_GRAYSCALE) ||
87 (private_colormap->visual->type == GDK_VISUAL_PSEUDO_COLOR))
88#endif
89 {
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90 int idx = m_color.pixel;
91 colMapAllocCounter[ idx ] = colMapAllocCounter[ idx ] - 1;
92
93 if (colMapAllocCounter[ idx ] == 0)
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94 gdk_colormap_free_colors( m_colormap, &m_color, 1 );
95 }
96 }
ff7b1510 97}
c801d85f 98
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99void wxColourRefData::AllocColour( GdkColormap *cmap )
100{
101 if (m_hasPixel && (m_colormap == cmap))
102 return;
103
104 FreeColour();
105
106#ifdef __WXGTK20__
107 if ((m_colormap->visual->type == GDK_VISUAL_GRAYSCALE) ||
108 (m_colormap->visual->type == GDK_VISUAL_PSEUDO_COLOR))
109#else
110 GdkColormapPrivate *private_colormap = (GdkColormapPrivate*) cmap;
111 if ((private_colormap->visual->type == GDK_VISUAL_GRAYSCALE) ||
112 (private_colormap->visual->type == GDK_VISUAL_PSEUDO_COLOR))
113#endif
114 {
115 m_hasPixel = gdk_colormap_alloc_color( cmap, &m_color, FALSE, TRUE );
116 int idx = m_color.pixel;
117 colMapAllocCounter[ idx ] = colMapAllocCounter[ idx ] + 1;
118 }
119 else
120 {
121 m_hasPixel = gdk_color_alloc( cmap, &m_color );
122 }
123 m_colormap = cmap;
124}
125
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126//-----------------------------------------------------------------------------
127
128#define M_COLDATA ((wxColourRefData *)m_refData)
129
130#define SHIFT (8*(sizeof(short int)-sizeof(char)))
131
132IMPLEMENT_DYNAMIC_CLASS(wxColour,wxGDIObject)
133
68dda785 134wxColour::wxColour()
c801d85f 135{
ff7b1510 136}
c801d85f 137
4b5f3fe6 138wxColour::wxColour( unsigned char red, unsigned char green, unsigned char blue )
c801d85f 139{
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140 m_refData = new wxColourRefData();
141 M_COLDATA->m_color.red = ((unsigned short)red) << SHIFT;
142 M_COLDATA->m_color.green = ((unsigned short)green) << SHIFT;
143 M_COLDATA->m_color.blue = ((unsigned short)blue) << SHIFT;
144 M_COLDATA->m_color.pixel = 0;
ff7b1510 145}
8bbe427f 146
68dda785 147void wxColour::InitFromName( const wxString &colourName )
c801d85f 148{
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149 wxNode *node = (wxNode *) NULL;
150 if ( (wxTheColourDatabase) && (node = wxTheColourDatabase->Find(colourName)) )
c801d85f 151 {
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152 wxColour *col = (wxColour*)node->Data();
153 UnRef();
154 if (col) Ref( *col );
155 }
156 else
157 {
158 m_refData = new wxColourRefData();
93c5dd39 159 if (!gdk_color_parse( colourName.mb_str(), &M_COLDATA->m_color ))
1ecc4d80 160 {
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161 // VZ: asserts are good in general but this one is triggered by
162 // calling wxColourDatabase::FindColour() with an
163 // unrecognized colour name and this can't be avoided from the
164 // user code, so don't give it here
165 //
166 // a better solution would be to changed code in FindColour()
167
168 //wxFAIL_MSG( wxT("wxColour: couldn't find colour") );
169
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170 delete m_refData;
171 m_refData = (wxObjectRefData *) NULL;
172 }
ff7b1510 173 }
ff7b1510 174}
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175
176wxColour::wxColour( const wxColour& col )
8bbe427f 177{
1ecc4d80 178 Ref( col );
ff7b1510 179}
c801d85f 180
68dda785 181wxColour::~wxColour()
c801d85f 182{
ff7b1510 183}
c801d85f 184
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185wxColour& wxColour::operator = ( const wxColour& col )
186{
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187 if (*this == col) return (*this);
188 Ref( col );
189 return *this;
ff7b1510 190}
c801d85f 191
33b64e6f 192bool wxColour::operator == ( const wxColour& col ) const
8bbe427f 193{
2b62ab35 194 if (m_refData == col.m_refData) return TRUE;
15248e43 195
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196 if (!m_refData) return FALSE;
197 if (!col.m_refData) return FALSE;
15248e43 198
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199 GdkColor *own = &(((wxColourRefData*)m_refData)->m_color);
200 GdkColor *other = &(((wxColourRefData*)col.m_refData)->m_color);
201 if (own->red != other->red) return FALSE;
202 if (own->blue != other->blue) return FALSE;
203 if (own->green != other->green) return FALSE;
15248e43 204
2b62ab35 205 return TRUE;
ff7b1510 206}
c801d85f 207
33b64e6f 208bool wxColour::operator != ( const wxColour& col) const
8bbe427f 209{
f6bcfd97 210 return !(*this == col);
ff7b1510 211}
c801d85f 212
4b5f3fe6 213void wxColour::Set( unsigned char red, unsigned char green, unsigned char blue )
c801d85f 214{
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215 UnRef();
216 m_refData = new wxColourRefData();
217 M_COLDATA->m_color.red = ((unsigned short)red) << SHIFT;
218 M_COLDATA->m_color.green = ((unsigned short)green) << SHIFT;
219 M_COLDATA->m_color.blue = ((unsigned short)blue) << SHIFT;
220 M_COLDATA->m_color.pixel = 0;
ff7b1510 221}
c801d85f 222
68dda785 223unsigned char wxColour::Red() const
c801d85f 224{
223d09f6 225 wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
8bbe427f 226
1ecc4d80 227 return (unsigned char)(M_COLDATA->m_color.red >> SHIFT);
ff7b1510 228}
c801d85f 229
68dda785 230unsigned char wxColour::Green() const
c801d85f 231{
223d09f6 232 wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
8bbe427f 233
1ecc4d80 234 return (unsigned char)(M_COLDATA->m_color.green >> SHIFT);
ff7b1510 235}
c801d85f 236
68dda785 237unsigned char wxColour::Blue() const
c801d85f 238{
223d09f6 239 wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
8bbe427f 240
1ecc4d80 241 return (unsigned char)(M_COLDATA->m_color.blue >> SHIFT);
ff7b1510 242}
c801d85f 243
68dda785 244bool wxColour::Ok() const
c801d85f 245{
1ecc4d80 246 return (m_refData != NULL);
ff7b1510 247}
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248
249void wxColour::CalcPixel( GdkColormap *cmap )
250{
1ecc4d80 251 if (!Ok()) return;
8bbe427f 252
d13fd3e4 253 M_COLDATA->AllocColour( cmap );
ff7b1510 254}
c801d85f 255
68dda785 256int wxColour::GetPixel() const
c801d85f 257{
223d09f6 258 wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
8bbe427f 259
1ecc4d80 260 return M_COLDATA->m_color.pixel;
ff7b1510 261}
c801d85f 262
68dda785 263GdkColor *wxColour::GetColor() const
c801d85f 264{
223d09f6 265 wxCHECK_MSG( Ok(), (GdkColor *) NULL, wxT("invalid colour") );
8bbe427f 266
1ecc4d80 267 return &M_COLDATA->m_color;
ff7b1510 268}
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269
270