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1 /////////////////////////////////////////////////////////////////////////////
2 // Name: palette.cpp
3 // Purpose: wxPalette
4 // Author: Julian Smart
5 // Modified by:
6 // Created: 17/09/98
7 // RCS-ID: $Id$
8 // Copyright: (c) Julian Smart
9 // Licence: wxWindows licence
10 /////////////////////////////////////////////////////////////////////////////
11
12 /*
13 * Colour map
14 *
15 * When constructed with the default constructor, we start from
16 * the wxApp::GetMainColormap, allocating additional read-only cells
17 * in Create(). The cells are freed on the next call to Create()
18 * or when the destructor is called.
19 */
20
21 /* Wolfram Gloger <u7y22ab@sunmail.lrz-muenchen.de>
22 I have implemented basic colormap support for the X11 versions of
23 wxWindows, notably wxPalette::Create(). The way I did it is to
24 allocate additional read-only color cells in the default colormap. In
25 general you will get arbitrary pixel values assigned to these new
26 cells and therefore I added a method wxColourMap::TransferBitmap()
27 which maps the pixel values 0..n to the real ones obtained with
28 Create(). This is only implemented for the popular case of 8-bit
29 depth.
30
31 Allocating read-write color cells would involve installing a private
32 X11 colormap for a particular window, and AFAIK this is not
33 recommended; only the window manager should do this... Also, it is
34 not the functionality that wxPalette::Create() aims to provide.
35 */
36
37 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
38 #pragma implementation "palette.h"
39 #endif
40
41 #include "wx/palette.h"
42 #include "wx/window.h"
43 #include "wx/app.h"
44 #include "wx/utils.h"
45
46 #ifdef __VMS__
47 #pragma message disable nosimpint
48 #endif
49 #include <Xm/Xm.h>
50 #ifdef __VMS__
51 #pragma message enable nosimpint
52 #endif
53 #include "wx/motif/private.h"
54
55 IMPLEMENT_DYNAMIC_CLASS(wxPalette, wxGDIObject)
56 IMPLEMENT_DYNAMIC_CLASS(wxXPalette, wxObject)
57
58 /*
59 * Palette
60 *
61 */
62
63 wxXPalette::wxXPalette()
64 {
65 m_cmap = (WXColormap) 0;
66 m_pix_array_n = 0;
67 m_pix_array = (unsigned long*) 0;
68 m_display = (WXDisplay*) 0;
69 m_destroyable = FALSE;
70 }
71
72 wxPaletteRefData::wxPaletteRefData()
73 {
74 }
75
76 wxPaletteRefData::~wxPaletteRefData()
77 {
78 Display *display = (Display*) NULL;
79
80 wxList::compatibility_iterator node, next;
81
82 for (node = m_palettes.GetFirst(); node; node = next) {
83 wxXPalette *c = (wxXPalette *)node->GetData();
84 unsigned long *pix_array = c->m_pix_array;
85 Colormap cmap = (Colormap) c->m_cmap;
86 bool destroyable = c->m_destroyable;
87 int pix_array_n = c->m_pix_array_n;
88 display = (Display*) c->m_display;
89
90 if (pix_array_n > 0)
91 {
92 // XFreeColors(display, cmap, pix_array, pix_array_n, 0);
93 // Be careful not to free '0' pixels...
94 int i, j;
95 for(i=j=0; i<pix_array_n; i=j) {
96 while(j<pix_array_n && pix_array[j]!=0) j++;
97 if(j > i) XFreeColors(display, cmap, &pix_array[i], j-i, 0);
98 while(j<pix_array_n && pix_array[j]==0) j++;
99 }
100 delete [] pix_array;
101 }
102
103 if (destroyable)
104 XFreeColormap(display, cmap);
105
106 next = node->GetNext();
107 m_palettes.Erase(node);
108 delete c;
109 }
110 }
111
112 wxPalette::wxPalette()
113 {
114 }
115
116 wxPalette::wxPalette(int n, const unsigned char *red, const unsigned char *green, const unsigned char *blue)
117 {
118 Create(n, red, green, blue);
119 }
120
121 wxPalette::~wxPalette()
122 {
123 }
124
125 bool wxPalette::Create(int n, const unsigned char *red, const unsigned char *green, const unsigned char *blue)
126 {
127 UnRef();
128
129 if (!n) {
130 return FALSE;
131 }
132
133 m_refData = new wxPaletteRefData;
134
135 XColor xcol;
136 Display* display = (Display*) wxGetDisplay();
137
138 unsigned long *pix_array;
139 Colormap cmap;
140 int pix_array_n;
141
142 cmap = (Colormap) wxTheApp->GetMainColormap(display);
143
144 pix_array = new unsigned long[n];
145 if (!pix_array)
146 return FALSE;
147
148 pix_array_n = n;
149 xcol.flags = DoRed | DoGreen | DoBlue;
150 for(int i = 0; i < n; i++) {
151 xcol.red = (unsigned short)red[i] << 8;
152 xcol.green = (unsigned short)green[i] << 8;
153 xcol.blue = (unsigned short)blue[i] << 8;
154 pix_array[i] = (XAllocColor(display, cmap, &xcol) == 0) ? 0 : xcol.pixel;
155 }
156
157 wxXPalette *c = new wxXPalette;
158
159 c->m_pix_array_n = pix_array_n;
160 c->m_pix_array = pix_array;
161 c->m_cmap = (WXColormap) cmap;
162 c->m_display = (WXDisplay*) display;
163 c->m_destroyable = FALSE;
164 M_PALETTEDATA->m_palettes.Append(c);
165
166 return TRUE;
167 }
168
169 int wxPalette::GetPixel(const unsigned char red, const unsigned char green, const unsigned char blue) const
170 {
171 if ( !m_refData )
172 return FALSE;
173
174 // TODO
175 return FALSE;
176 }
177
178 bool wxPalette::GetRGB(int index, unsigned char *WXUNUSED(red), unsigned char *WXUNUSED(green), unsigned char *WXUNUSED(blue)) const
179 {
180 if ( !m_refData )
181 return FALSE;
182
183 if (index < 0 || index > 255)
184 return FALSE;
185
186 // TODO
187 return FALSE;
188 }
189
190 WXColormap wxPalette::GetXColormap(WXDisplay* display) const
191 {
192 if (!M_PALETTEDATA || (M_PALETTEDATA->m_palettes.GetCount() == 0))
193 return wxTheApp->GetMainColormap(display);
194
195 wxList::compatibility_iterator node = M_PALETTEDATA->m_palettes.GetFirst();
196 if (!display && node)
197 {
198 wxXPalette* p = (wxXPalette*) node->GetData();
199 return p->m_cmap;
200 }
201 while (node)
202 {
203 wxXPalette* p = (wxXPalette*) node->GetData();
204 if (p->m_display == display)
205 return p->m_cmap;
206
207 node = node->GetNext();
208 }
209
210 /* Make a new one: */
211 wxXPalette *c = new wxXPalette;
212 wxXPalette *first =
213 (wxXPalette *)M_PALETTEDATA->m_palettes.GetFirst()->GetData();
214 XColor xcol;
215 int pix_array_n = first->m_pix_array_n;
216
217 c->m_pix_array_n = pix_array_n;
218 c->m_pix_array = new unsigned long[pix_array_n];
219 c->m_display = display;
220 c->m_cmap = wxTheApp->GetMainColormap(display);
221 c->m_destroyable = FALSE;
222
223 xcol.flags = DoRed | DoGreen | DoBlue;
224 int i;
225 for (i = 0; i < pix_array_n; i++)
226 {
227 xcol.pixel = first->m_pix_array[i];
228 XQueryColor((Display*) first->m_display,
229 (Colormap) first->m_cmap, &xcol);
230 c->m_pix_array[i] =
231 (XAllocColor((Display*) display, (Colormap) c->m_cmap, &xcol) == 0)
232 ? 0 : xcol.pixel;
233 }
234
235 // wxPalette* nonConstThis = (wxPalette*) this;
236
237 M_PALETTEDATA->m_palettes.Append(c);
238
239 return c->m_cmap;
240 }
241
242 bool wxPalette::TransferBitmap(void *data, int depth, int size)
243 {
244 switch(depth) {
245 case 8:
246 {
247 unsigned char *uptr = (unsigned char *)data;
248 int pix_array_n;
249 unsigned long *pix_array = GetXPixArray((Display*) wxGetDisplay(), &pix_array_n);
250 while(size-- > 0)
251 {
252 if((int)*uptr < pix_array_n)
253 *uptr = (unsigned char)pix_array[*uptr];
254 uptr++;
255 }
256
257 return TRUE;
258 }
259 default:
260 return FALSE;
261 }
262 }
263
264 bool wxPalette::TransferBitmap8(unsigned char *data, unsigned long sz,
265 void *dest, unsigned int bpp)
266 {
267 int pix_array_n;
268 unsigned long *pix_array = GetXPixArray((Display*) wxGetDisplay(), &pix_array_n);
269 switch(bpp) {
270 case 8: {
271 unsigned char *dptr = (unsigned char *)dest;
272 while(sz-- > 0) {
273 if((int)*data < pix_array_n)
274 *dptr = (unsigned char)pix_array[*data];
275 data++;
276 dptr++;
277 }
278 break;
279 }
280 case 16: {
281 unsigned short *dptr = (unsigned short *)dest;
282 while(sz-- > 0) {
283 if((int)*data < pix_array_n)
284 *dptr = (unsigned short)pix_array[*data];
285 data++;
286 dptr++;
287 }
288 break;
289 }
290 case 24: {
291 struct rgb24 { unsigned char r, g, b; } *dptr = (struct rgb24 *)dest;
292 while(sz-- > 0) {
293 if((int)*data < pix_array_n) {
294 dptr->r = pix_array[*data] & 0xFF;
295 dptr->g = (pix_array[*data] >> 8) & 0xFF;
296 dptr->b = (pix_array[*data] >> 16) & 0xFF;
297 }
298 data++;
299 dptr++;
300 }
301 break;
302 }
303 case 32: {
304 unsigned long *dptr = (unsigned long *)dest;
305 while(sz-- > 0) {
306 if((int)*data < pix_array_n)
307 *dptr = pix_array[*data];
308 data++;
309 dptr++;
310 }
311 break;
312 }
313 default:
314 return FALSE;
315 }
316 return TRUE;
317 }
318
319 unsigned long *wxPalette::GetXPixArray(WXDisplay *display, int *n)
320 {
321 if (!M_PALETTEDATA)
322 return (unsigned long*) 0;
323 wxList::compatibility_iterator node;
324
325 for (node = M_PALETTEDATA->m_palettes.GetFirst(); node;
326 node = node->GetNext())
327 {
328 wxXPalette *c = (wxXPalette *)node->GetData();
329 if (c->m_display == display)
330 {
331 if (n)
332 *n = c->m_pix_array_n;
333 return c->m_pix_array;
334 }
335 }
336
337 /* Not found; call GetXColormap, which will create it, then this again */
338 if (GetXColormap(display))
339 return GetXPixArray(display, n);
340 else
341 return (unsigned long*) 0;
342 }
343
344 void wxPalette::PutXColormap(WXDisplay* display, WXColormap cm, bool dp)
345 {
346 UnRef();
347
348 m_refData = new wxPaletteRefData;
349
350 wxXPalette *c = new wxXPalette;
351
352 c->m_pix_array_n = 0;
353 c->m_pix_array = (unsigned long*) NULL;
354 c->m_display = display;
355 c->m_cmap = cm;
356 c->m_destroyable = dp;
357
358 M_PALETTEDATA->m_palettes.Append(c);
359 }
360