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1 /////////////////////////////////////////////////////////////////////////////
2 // Name: xpmdecod.cpp
3 // Purpose: wxXPMDecoder
4 // Author: John Cristy, Vaclav Slavik
5 // RCS-ID: $Id$
6 // Copyright: (c) John Cristy, Vaclav Slavik
7 // Licence: wxWindows licence
8 /////////////////////////////////////////////////////////////////////////////
9
10 /*
11
12 This file is partially based on source code of ImageMagick by John Cristy. Its
13 license is as follows:
14
15 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
16 % %
17 % %
18 % %
19 % X X PPPP M M %
20 % X X P P MM MM %
21 % X PPPP M M M %
22 % X X P M M %
23 % X X P M M %
24 % %
25 % %
26 % Read/Write ImageMagick Image Format. %
27 % %
28 % %
29 % Software Design %
30 % John Cristy %
31 % July 1992 %
32 % %
33 % %
34 % Copyright (C) 2001 ImageMagick Studio, a non-profit organization dedicated %
35 % to making software imaging solutions freely available. %
36 % %
37 % Permission is hereby granted, free of charge, to any person obtaining a %
38 % copy of this software and associated documentation files ("ImageMagick"), %
39 % to deal in ImageMagick without restriction, including without limitation %
40 % the rights to use, copy, modify, merge, publish, distribute, sublicense, %
41 % and/or sell copies of ImageMagick, and to permit persons to whom the %
42 % ImageMagick is furnished to do so, subject to the following conditions: %
43 % %
44 % The above copyright notice and this permission notice shall be included in %
45 % all copies or substantial portions of ImageMagick. %
46 % %
47 % The software is provided "as is", without warranty of any kind, express or %
48 % implied, including but not limited to the warranties of merchantability, %
49 % fitness for a particular purpose and noninfringement. In no event shall %
50 % ImageMagick Studio be liable for any claim, damages or other liability, %
51 % whether in an action of contract, tort or otherwise, arising from, out of %
52 % or in connection with ImageMagick or the use or other dealings in %
53 % ImageMagick. %
54 % %
55 % Except as contained in this notice, the name of the ImageMagick Studio %
56 % shall not be used in advertising or otherwise to promote the sale, use or %
57 % other dealings in ImageMagick without prior written authorization from the %
58 % ImageMagick Studio. %
59 % %
60 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
61 %
62 %
63 */
64
65 /*
66 * Also contains some pieces from libxpm and its modification for win32 by
67 * HeDu <hedu@cul-ipn.uni-kiel.de>:
68 *
69 * Copyright (C) 1989-95 GROUPE BULL
70 *
71 * Permission is hereby granted, free of charge, to any person obtaining a copy
72 * of this software and associated documentation files (the "Software"), to
73 * deal in the Software without restriction, including without limitation the
74 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
75 * sell copies of the Software, and to permit persons to whom the Software is
76 * furnished to do so, subject to the following conditions:
77 *
78 * The above copyright notice and this permission notice shall be included in
79 * all copies or substantial portions of the Software.
80 *
81 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
82 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
83 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
84 * GROUPE BULL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
85 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
86 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
87 *
88 * Except as contained in this notice, the name of GROUPE BULL shall not be
89 * used in advertising or otherwise to promote the sale, use or other dealings
90 * in this Software without prior written authorization from GROUPE BULL.
91 */
92
93 // For compilers that support precompilation, includes "wx.h".
94 #include "wx/wxprec.h"
95
96 #ifdef __BORLANDC__
97 # pragma hdrstop
98 #endif
99
100 #ifndef WX_PRECOMP
101 # include "wx/defs.h"
102 #endif
103
104 #if wxUSE_IMAGE && wxUSE_XPM
105
106 #include "wx/stream.h"
107 #include "wx/image.h"
108 #include "wx/utils.h"
109 #include "wx/log.h"
110 #include "wx/hashmap.h"
111 #include "wx/intl.h"
112 #include <string.h>
113
114 #include <ctype.h>
115
116 #include "wx/xpmdecod.h"
117
118 #if wxUSE_STREAMS
119 bool wxXPMDecoder::CanRead(wxInputStream& stream)
120 {
121 unsigned char buf[9];
122
123 if ( !stream.Read(buf, WXSIZEOF(buf)) )
124 return false;
125
126 stream.SeekI(-(wxFileOffset)WXSIZEOF(buf), wxFromCurrent);
127
128 return memcmp(buf, "/* XPM */", WXSIZEOF(buf)) == 0;
129 }
130
131 wxImage wxXPMDecoder::ReadFile(wxInputStream& stream)
132 {
133 size_t length = stream.GetSize();
134 wxCHECK_MSG( length != 0, wxNullImage,
135 wxT("Cannot read XPM from stream of unknown size") );
136
137 // use a smart buffer to be sure to free memory even when we return on
138 // error
139 wxCharBuffer buffer(length);
140
141 char *xpm_buffer = (char *)buffer.data();
142 if ( stream.Read(xpm_buffer, length).GetLastError() == wxSTREAM_READ_ERROR )
143 return wxNullImage;
144 xpm_buffer[length] = '\0';
145
146 /*
147 * Remove comments from the file:
148 */
149 char *p, *q;
150 for (p = xpm_buffer; *p != '\0'; p++)
151 {
152 if ( (*p == '"') || (*p == '\'') )
153 {
154 if (*p == '"')
155 {
156 for (p++; *p != '\0'; p++)
157 if ( (*p == '"') && (*(p - 1) != '\\') )
158 break;
159 }
160 else // *p == '\''
161 {
162 for (p++; *p != '\0'; p++)
163 if ( (*p == '\'') && (*(p - 1) != '\\') )
164 break;
165 }
166 if (*p == '\0')
167 break;
168 continue;
169 }
170 if ( (*p != '/') || (*(p + 1) != '*') )
171 continue;
172 for (q = p + 2; *q != '\0'; q++)
173 {
174 if ( (*q == '*') && (*(q + 1) == '/') )
175 break;
176 }
177
178 // memmove allows overlaps (unlike strcpy):
179 size_t cpylen = strlen(q + 2) + 1;
180 memmove(p, q + 2, cpylen);
181 }
182
183 /*
184 * Remove unquoted characters:
185 */
186 size_t i = 0;
187 for (p = xpm_buffer; *p != '\0'; p++)
188 {
189 if ( *p != '"' )
190 continue;
191 for (q = p + 1; *q != '\0'; q++)
192 if (*q == '"')
193 break;
194 strncpy(xpm_buffer + i, p + 1, q - p - 1);
195 i += q - p - 1;
196 xpm_buffer[i++] = '\n';
197 p = q + 1;
198 }
199 xpm_buffer[i] = '\0';
200
201 /*
202 * Create array of lines and convert \n's to \0's:
203 */
204 const char **xpm_lines;
205 size_t lines_cnt = 0;
206 size_t line;
207
208 for (p = xpm_buffer; *p != '\0'; p++)
209 {
210 if ( *p == '\n' )
211 lines_cnt++;
212 }
213
214 if ( !lines_cnt )
215 {
216 // this doesn't really look an XPM image
217 return wxNullImage;
218 }
219
220 xpm_lines = new const char*[lines_cnt + 1];
221 xpm_lines[0] = xpm_buffer;
222 line = 1;
223 for (p = xpm_buffer; (*p != '\0') && (line < lines_cnt); p++)
224 {
225 if ( *p == '\n' )
226 {
227 xpm_lines[line] = p + 1;
228 *p = '\0';
229 line++;
230 }
231 }
232
233 xpm_lines[lines_cnt] = NULL;
234
235 /*
236 * Read the image:
237 */
238 wxImage img = ReadData(xpm_lines);
239
240 delete[] xpm_lines;
241
242 return img;
243 }
244 #endif // wxUSE_STREAMS
245
246
247 /*****************************************************************************\
248 * rgbtab.h *
249 * *
250 * A hard coded rgb.txt. To keep it short I removed all colornames with *
251 * trailing numbers, Blue3 etc, except the GrayXX. Sorry Grey-lovers I prefer *
252 * Gray ;-). But Grey is recognized on lookups, only on save Gray will be *
253 * used, maybe you want to do some substitue there too. *
254 * *
255 * To save memory the RGBs are coded in one long value, as done by the RGB *
256 * macro. *
257 * *
258 * Developed by HeDu 3/94 (hedu@cul-ipn.uni-kiel.de) *
259 \*****************************************************************************/
260
261
262 typedef struct
263 {
264 const char *name;
265 wxUint32 rgb;
266 } rgbRecord;
267
268 #define myRGB(r,g,b) ((wxUint32)r<<16|(wxUint32)g<<8|(wxUint32)b)
269
270 static rgbRecord theRGBRecords[] =
271 {
272 {"aliceblue", myRGB(240, 248, 255)},
273 {"antiquewhite", myRGB(250, 235, 215)},
274 {"aquamarine", myRGB(50, 191, 193)},
275 {"azure", myRGB(240, 255, 255)},
276 {"beige", myRGB(245, 245, 220)},
277 {"bisque", myRGB(255, 228, 196)},
278 {"black", myRGB(0, 0, 0)},
279 {"blanchedalmond", myRGB(255, 235, 205)},
280 {"blue", myRGB(0, 0, 255)},
281 {"blueviolet", myRGB(138, 43, 226)},
282 {"brown", myRGB(165, 42, 42)},
283 {"burlywood", myRGB(222, 184, 135)},
284 {"cadetblue", myRGB(95, 146, 158)},
285 {"chartreuse", myRGB(127, 255, 0)},
286 {"chocolate", myRGB(210, 105, 30)},
287 {"coral", myRGB(255, 114, 86)},
288 {"cornflowerblue", myRGB(34, 34, 152)},
289 {"cornsilk", myRGB(255, 248, 220)},
290 {"cyan", myRGB(0, 255, 255)},
291 {"darkgoldenrod", myRGB(184, 134, 11)},
292 {"darkgreen", myRGB(0, 86, 45)},
293 {"darkkhaki", myRGB(189, 183, 107)},
294 {"darkolivegreen", myRGB(85, 86, 47)},
295 {"darkorange", myRGB(255, 140, 0)},
296 {"darkorchid", myRGB(139, 32, 139)},
297 {"darksalmon", myRGB(233, 150, 122)},
298 {"darkseagreen", myRGB(143, 188, 143)},
299 {"darkslateblue", myRGB(56, 75, 102)},
300 {"darkslategray", myRGB(47, 79, 79)},
301 {"darkturquoise", myRGB(0, 166, 166)},
302 {"darkviolet", myRGB(148, 0, 211)},
303 {"deeppink", myRGB(255, 20, 147)},
304 {"deepskyblue", myRGB(0, 191, 255)},
305 {"dimgray", myRGB(84, 84, 84)},
306 {"dodgerblue", myRGB(30, 144, 255)},
307 {"firebrick", myRGB(142, 35, 35)},
308 {"floralwhite", myRGB(255, 250, 240)},
309 {"forestgreen", myRGB(80, 159, 105)},
310 {"gainsboro", myRGB(220, 220, 220)},
311 {"ghostwhite", myRGB(248, 248, 255)},
312 {"gold", myRGB(218, 170, 0)},
313 {"goldenrod", myRGB(239, 223, 132)},
314 {"gray", myRGB(126, 126, 126)},
315 {"gray0", myRGB(0, 0, 0)},
316 {"gray1", myRGB(3, 3, 3)},
317 {"gray10", myRGB(26, 26, 26)},
318 {"gray100", myRGB(255, 255, 255)},
319 {"gray11", myRGB(28, 28, 28)},
320 {"gray12", myRGB(31, 31, 31)},
321 {"gray13", myRGB(33, 33, 33)},
322 {"gray14", myRGB(36, 36, 36)},
323 {"gray15", myRGB(38, 38, 38)},
324 {"gray16", myRGB(41, 41, 41)},
325 {"gray17", myRGB(43, 43, 43)},
326 {"gray18", myRGB(46, 46, 46)},
327 {"gray19", myRGB(48, 48, 48)},
328 {"gray2", myRGB(5, 5, 5)},
329 {"gray20", myRGB(51, 51, 51)},
330 {"gray21", myRGB(54, 54, 54)},
331 {"gray22", myRGB(56, 56, 56)},
332 {"gray23", myRGB(59, 59, 59)},
333 {"gray24", myRGB(61, 61, 61)},
334 {"gray25", myRGB(64, 64, 64)},
335 {"gray26", myRGB(66, 66, 66)},
336 {"gray27", myRGB(69, 69, 69)},
337 {"gray28", myRGB(71, 71, 71)},
338 {"gray29", myRGB(74, 74, 74)},
339 {"gray3", myRGB(8, 8, 8)},
340 {"gray30", myRGB(77, 77, 77)},
341 {"gray31", myRGB(79, 79, 79)},
342 {"gray32", myRGB(82, 82, 82)},
343 {"gray33", myRGB(84, 84, 84)},
344 {"gray34", myRGB(87, 87, 87)},
345 {"gray35", myRGB(89, 89, 89)},
346 {"gray36", myRGB(92, 92, 92)},
347 {"gray37", myRGB(94, 94, 94)},
348 {"gray38", myRGB(97, 97, 97)},
349 {"gray39", myRGB(99, 99, 99)},
350 {"gray4", myRGB(10, 10, 10)},
351 {"gray40", myRGB(102, 102, 102)},
352 {"gray41", myRGB(105, 105, 105)},
353 {"gray42", myRGB(107, 107, 107)},
354 {"gray43", myRGB(110, 110, 110)},
355 {"gray44", myRGB(112, 112, 112)},
356 {"gray45", myRGB(115, 115, 115)},
357 {"gray46", myRGB(117, 117, 117)},
358 {"gray47", myRGB(120, 120, 120)},
359 {"gray48", myRGB(122, 122, 122)},
360 {"gray49", myRGB(125, 125, 125)},
361 {"gray5", myRGB(13, 13, 13)},
362 {"gray50", myRGB(127, 127, 127)},
363 {"gray51", myRGB(130, 130, 130)},
364 {"gray52", myRGB(133, 133, 133)},
365 {"gray53", myRGB(135, 135, 135)},
366 {"gray54", myRGB(138, 138, 138)},
367 {"gray55", myRGB(140, 140, 140)},
368 {"gray56", myRGB(143, 143, 143)},
369 {"gray57", myRGB(145, 145, 145)},
370 {"gray58", myRGB(148, 148, 148)},
371 {"gray59", myRGB(150, 150, 150)},
372 {"gray6", myRGB(15, 15, 15)},
373 {"gray60", myRGB(153, 153, 153)},
374 {"gray61", myRGB(156, 156, 156)},
375 {"gray62", myRGB(158, 158, 158)},
376 {"gray63", myRGB(161, 161, 161)},
377 {"gray64", myRGB(163, 163, 163)},
378 {"gray65", myRGB(166, 166, 166)},
379 {"gray66", myRGB(168, 168, 168)},
380 {"gray67", myRGB(171, 171, 171)},
381 {"gray68", myRGB(173, 173, 173)},
382 {"gray69", myRGB(176, 176, 176)},
383 {"gray7", myRGB(18, 18, 18)},
384 {"gray70", myRGB(179, 179, 179)},
385 {"gray71", myRGB(181, 181, 181)},
386 {"gray72", myRGB(184, 184, 184)},
387 {"gray73", myRGB(186, 186, 186)},
388 {"gray74", myRGB(189, 189, 189)},
389 {"gray75", myRGB(191, 191, 191)},
390 {"gray76", myRGB(194, 194, 194)},
391 {"gray77", myRGB(196, 196, 196)},
392 {"gray78", myRGB(199, 199, 199)},
393 {"gray79", myRGB(201, 201, 201)},
394 {"gray8", myRGB(20, 20, 20)},
395 {"gray80", myRGB(204, 204, 204)},
396 {"gray81", myRGB(207, 207, 207)},
397 {"gray82", myRGB(209, 209, 209)},
398 {"gray83", myRGB(212, 212, 212)},
399 {"gray84", myRGB(214, 214, 214)},
400 {"gray85", myRGB(217, 217, 217)},
401 {"gray86", myRGB(219, 219, 219)},
402 {"gray87", myRGB(222, 222, 222)},
403 {"gray88", myRGB(224, 224, 224)},
404 {"gray89", myRGB(227, 227, 227)},
405 {"gray9", myRGB(23, 23, 23)},
406 {"gray90", myRGB(229, 229, 229)},
407 {"gray91", myRGB(232, 232, 232)},
408 {"gray92", myRGB(235, 235, 235)},
409 {"gray93", myRGB(237, 237, 237)},
410 {"gray94", myRGB(240, 240, 240)},
411 {"gray95", myRGB(242, 242, 242)},
412 {"gray96", myRGB(245, 245, 245)},
413 {"gray97", myRGB(247, 247, 247)},
414 {"gray98", myRGB(250, 250, 250)},
415 {"gray99", myRGB(252, 252, 252)},
416 {"green", myRGB(0, 255, 0)},
417 {"greenyellow", myRGB(173, 255, 47)},
418 {"honeydew", myRGB(240, 255, 240)},
419 {"hotpink", myRGB(255, 105, 180)},
420 {"indianred", myRGB(107, 57, 57)},
421 {"ivory", myRGB(255, 255, 240)},
422 {"khaki", myRGB(179, 179, 126)},
423 {"lavender", myRGB(230, 230, 250)},
424 {"lavenderblush", myRGB(255, 240, 245)},
425 {"lawngreen", myRGB(124, 252, 0)},
426 {"lemonchiffon", myRGB(255, 250, 205)},
427 {"lightblue", myRGB(176, 226, 255)},
428 {"lightcoral", myRGB(240, 128, 128)},
429 {"lightcyan", myRGB(224, 255, 255)},
430 {"lightgoldenrod", myRGB(238, 221, 130)},
431 {"lightgoldenrodyellow", myRGB(250, 250, 210)},
432 {"lightgray", myRGB(168, 168, 168)},
433 {"lightpink", myRGB(255, 182, 193)},
434 {"lightsalmon", myRGB(255, 160, 122)},
435 {"lightseagreen", myRGB(32, 178, 170)},
436 {"lightskyblue", myRGB(135, 206, 250)},
437 {"lightslateblue", myRGB(132, 112, 255)},
438 {"lightslategray", myRGB(119, 136, 153)},
439 {"lightsteelblue", myRGB(124, 152, 211)},
440 {"lightyellow", myRGB(255, 255, 224)},
441 {"limegreen", myRGB(0, 175, 20)},
442 {"linen", myRGB(250, 240, 230)},
443 {"magenta", myRGB(255, 0, 255)},
444 {"maroon", myRGB(143, 0, 82)},
445 {"mediumaquamarine", myRGB(0, 147, 143)},
446 {"mediumblue", myRGB(50, 50, 204)},
447 {"mediumforestgreen", myRGB(50, 129, 75)},
448 {"mediumgoldenrod", myRGB(209, 193, 102)},
449 {"mediumorchid", myRGB(189, 82, 189)},
450 {"mediumpurple", myRGB(147, 112, 219)},
451 {"mediumseagreen", myRGB(52, 119, 102)},
452 {"mediumslateblue", myRGB(106, 106, 141)},
453 {"mediumspringgreen", myRGB(35, 142, 35)},
454 {"mediumturquoise", myRGB(0, 210, 210)},
455 {"mediumvioletred", myRGB(213, 32, 121)},
456 {"midnightblue", myRGB(47, 47, 100)},
457 {"mintcream", myRGB(245, 255, 250)},
458 {"mistyrose", myRGB(255, 228, 225)},
459 {"moccasin", myRGB(255, 228, 181)},
460 {"navajowhite", myRGB(255, 222, 173)},
461 {"navy", myRGB(35, 35, 117)},
462 {"navyblue", myRGB(35, 35, 117)},
463 {"oldlace", myRGB(253, 245, 230)},
464 {"olivedrab", myRGB(107, 142, 35)},
465 {"orange", myRGB(255, 135, 0)},
466 {"orangered", myRGB(255, 69, 0)},
467 {"orchid", myRGB(239, 132, 239)},
468 {"palegoldenrod", myRGB(238, 232, 170)},
469 {"palegreen", myRGB(115, 222, 120)},
470 {"paleturquoise", myRGB(175, 238, 238)},
471 {"palevioletred", myRGB(219, 112, 147)},
472 {"papayawhip", myRGB(255, 239, 213)},
473 {"peachpuff", myRGB(255, 218, 185)},
474 {"peru", myRGB(205, 133, 63)},
475 {"pink", myRGB(255, 181, 197)},
476 {"plum", myRGB(197, 72, 155)},
477 {"powderblue", myRGB(176, 224, 230)},
478 {"purple", myRGB(160, 32, 240)},
479 {"red", myRGB(255, 0, 0)},
480 {"rosybrown", myRGB(188, 143, 143)},
481 {"royalblue", myRGB(65, 105, 225)},
482 {"saddlebrown", myRGB(139, 69, 19)},
483 {"salmon", myRGB(233, 150, 122)},
484 {"sandybrown", myRGB(244, 164, 96)},
485 {"seagreen", myRGB(82, 149, 132)},
486 {"seashell", myRGB(255, 245, 238)},
487 {"sienna", myRGB(150, 82, 45)},
488 {"silver", myRGB(192, 192, 192)},
489 {"skyblue", myRGB(114, 159, 255)},
490 {"slateblue", myRGB(126, 136, 171)},
491 {"slategray", myRGB(112, 128, 144)},
492 {"snow", myRGB(255, 250, 250)},
493 {"springgreen", myRGB(65, 172, 65)},
494 {"steelblue", myRGB(84, 112, 170)},
495 {"tan", myRGB(222, 184, 135)},
496 {"thistle", myRGB(216, 191, 216)},
497 {"tomato", myRGB(255, 99, 71)},
498 {"transparent", myRGB(0, 0, 1)},
499 {"turquoise", myRGB(25, 204, 223)},
500 {"violet", myRGB(156, 62, 206)},
501 {"violetred", myRGB(243, 62, 150)},
502 {"wheat", myRGB(245, 222, 179)},
503 {"white", myRGB(255, 255, 255)},
504 {"whitesmoke", myRGB(245, 245, 245)},
505 {"yellow", myRGB(255, 255, 0)},
506 {"yellowgreen", myRGB(50, 216, 56)},
507 {NULL, myRGB(0, 0, 0)}
508 };
509 static int numTheRGBRecords = 235;
510
511 static unsigned char ParseHexadecimal(char digit1, char digit2)
512 {
513 unsigned char i1, i2;
514
515 if (digit1 >= 'a')
516 i1 = (unsigned char)(digit1 - 'a' + 0x0A);
517 else if (digit1 >= 'A')
518 i1 = (unsigned char)(digit1 - 'A' + 0x0A);
519 else
520 i1 = (unsigned char)(digit1 - '0');
521 if (digit2 >= 'a')
522 i2 = (unsigned char)(digit2 - 'a' + 0x0A);
523 else if (digit2 >= 'A')
524 i2 = (unsigned char)(digit2 - 'A' + 0x0A);
525 else
526 i2 = (unsigned char)(digit2 - '0');
527 return (unsigned char)(0x10 * i1 + i2);
528 }
529
530 static bool GetRGBFromName(const char *inname, bool *isNone,
531 unsigned char *r, unsigned char*g, unsigned char *b)
532 {
533 int left, right, middle;
534 int cmp;
535 wxUint32 rgbVal;
536 char *name;
537 char *grey, *p;
538
539 // Neither #rrggbb nor #rrrrggggbbbb are in database, we parse them directly
540 size_t inname_len = strlen(inname);
541 if ( *inname == '#' && (inname_len == 7 || inname_len == 13))
542 {
543 size_t ofs = (inname_len == 7) ? 2 : 4;
544 *r = ParseHexadecimal(inname[1], inname[2]);
545 *g = ParseHexadecimal(inname[1*ofs+1], inname[1*ofs+2]);
546 *b = ParseHexadecimal(inname[2*ofs+1], inname[2*ofs+2]);
547 *isNone = false;
548 return true;
549 }
550
551 name = wxStrdupA(inname);
552
553 // theRGBRecords[] has no names with spaces, and no grey, but a
554 // lot of gray...
555
556 // so first extract ' '
557 while ((p = strchr(name, ' ')) != NULL)
558 {
559 while (*(p)) // till eof of string
560 {
561 *p = *(p + 1); // copy to the left
562 p++;
563 }
564 }
565 // fold to lower case
566 p = name;
567 while (*p)
568 {
569 *p = (char)tolower(*p);
570 p++;
571 }
572
573 // substitute Grey with Gray, else rgbtab.h would have more than 100
574 // 'duplicate' entries
575 if ( (grey = strstr(name, "grey")) != NULL )
576 grey[2] = 'a';
577
578 // check for special 'none' colour:
579 bool found;
580 if ( strcmp(name, "none") == 0 )
581 {
582 *isNone = true;
583 found = true;
584 }
585 else // not "None"
586 {
587 found = false;
588
589 // binary search:
590 left = 0;
591 right = numTheRGBRecords - 1;
592 do
593 {
594 middle = (left + right) / 2;
595 cmp = strcmp(name, theRGBRecords[middle].name);
596 if ( cmp == 0 )
597 {
598 rgbVal = theRGBRecords[middle].rgb;
599 *r = (unsigned char)((rgbVal >> 16) & 0xFF);
600 *g = (unsigned char)((rgbVal >> 8) & 0xFF);
601 *b = (unsigned char)((rgbVal) & 0xFF);
602 *isNone = false;
603 found = true;
604 break;
605 }
606 else if ( cmp < 0 )
607 {
608 right = middle - 1;
609 }
610 else // cmp > 0
611 {
612 left = middle + 1;
613 }
614 } while (left <= right);
615 }
616
617 free(name);
618
619 return found;
620 }
621
622 static const char *ParseColor(const char *data)
623 {
624 static const char *targets[] =
625 {"c ", "g ", "g4 ", "m ", "b ", "s ", NULL};
626
627 const char *p, *r;
628 const char *q;
629 int i;
630
631 for (i = 0; targets[i] != NULL; i++)
632 {
633 r = data;
634 for (q = targets[i]; *r != '\0'; r++)
635 {
636 if ( *r != *q )
637 continue;
638 if ( !isspace((int) (*(r - 1))) )
639 continue;
640 p = r;
641 for (;;)
642 {
643 if ( *q == '\0' )
644 return p;
645 if ( *p++ != *q++ )
646 break;
647 }
648 q = targets[i];
649 }
650 }
651 return NULL;
652 }
653
654 struct wxXPMColourMapData
655 {
656 unsigned char R,G,B;
657 };
658 WX_DECLARE_STRING_HASH_MAP(wxXPMColourMapData, wxXPMColourMap);
659
660 wxImage wxXPMDecoder::ReadData(const char **xpm_data)
661 {
662 wxCHECK_MSG(xpm_data, wxNullImage, wxT("NULL XPM data") );
663
664 wxImage img;
665 int count;
666 unsigned width, height, colors_cnt, chars_per_pixel;
667 size_t i, j, i_key;
668 wxChar key[64];
669 const char *clr_def;
670 bool hasMask;
671 wxXPMColourMap clr_tbl;
672 wxXPMColourMap::iterator it;
673 wxString maskKey;
674
675 /*
676 * Read hints and initialize structures:
677 */
678
679 count = sscanf(xpm_data[0], "%u %u %u %u",
680 &width, &height, &colors_cnt, &chars_per_pixel);
681 if ( count != 4 || width * height * colors_cnt == 0 )
682 {
683 wxLogError(_("XPM: incorrect header format!"));
684 return wxNullImage;
685 }
686
687 // VS: XPM color map this large would be insane, since XPMs are encoded with
688 // 92 possible values on each position, 92^64 is *way* larger space than
689 // 8bit RGB...
690 wxCHECK_MSG(chars_per_pixel < 64, wxNullImage, wxT("XPM colormaps this large not supported."));
691
692 if ( !img.Create(width, height) )
693 return wxNullImage;
694
695 img.SetMask(false);
696 key[chars_per_pixel] = wxT('\0');
697 hasMask = false;
698
699 /*
700 * Create colour map:
701 */
702 for (i = 0; i < colors_cnt; i++)
703 {
704 const char *xmpColLine = xpm_data[1 + i];
705
706 // we must have at least " x y" after the colour index, hence +5
707 if ( !xmpColLine || strlen(xmpColLine) < chars_per_pixel + 5 )
708 {
709 wxLogError(_("XPM: incorrect colour description in line %d"),
710 (int)(1 + i));
711 return wxNullImage;
712 }
713
714 wxXPMColourMapData clr_data;
715
716 for (i_key = 0; i_key < chars_per_pixel; i_key++)
717 key[i_key] = (wxChar)xmpColLine[i_key];
718 clr_def = ParseColor(xmpColLine + chars_per_pixel);
719
720 if ( clr_def == NULL )
721 {
722 wxLogError(_("XPM: malformed colour definition '%s' at line %d!"),
723 xmpColLine, (int)(1 + i));
724 return wxNullImage;
725 }
726
727 bool isNone = false;
728 if ( !GetRGBFromName(clr_def, &isNone,
729 &clr_data.R, &clr_data.G, &clr_data.B) )
730 {
731 wxLogError(_("XPM: malformed colour definition '%s' at line %d!"),
732 xmpColLine, (int)(1 + i));
733 return wxNullImage;
734 }
735
736 if ( isNone )
737 {
738 img.SetMask(true);
739 img.SetMaskColour(255, 0, 255);
740 clr_data.R =
741 clr_data.B = 255;
742 clr_data.G = 0;
743 hasMask = true;
744 maskKey = key;
745 }
746
747 clr_tbl[key] = clr_data;
748 }
749
750 /*
751 * Modify colour entries with RGB = (255,0,255) to (255,0,254) if
752 * mask colour is present (so that existing pixels with (255,0,255)
753 * magenta colour are not incorrectly made transparent):
754 */
755 if (hasMask)
756 {
757 for (it = clr_tbl.begin(); it != clr_tbl.end(); ++it)
758 {
759 if (it->second.R == 255 && it->second.G == 0 &&
760 it->second.B == 255 &&
761 it->first != maskKey)
762 {
763 it->second.B = 254;
764 }
765 }
766 }
767
768 /*
769 * Parse image data:
770 */
771
772 unsigned char *img_data = img.GetData();
773 wxXPMColourMap::iterator entry;
774 wxXPMColourMap::iterator end = clr_tbl.end();
775
776 for (j = 0; j < height; j++)
777 {
778 for (i = 0; i < width; i++, img_data += 3)
779 {
780 const char *xpmImgLine = xpm_data[1 + colors_cnt + j];
781 if ( !xpmImgLine || strlen(xpmImgLine) < width*chars_per_pixel )
782 {
783 wxLogError(_("XPM: truncated image data at line %d!"),
784 (int)(1 + colors_cnt + j));
785 return wxNullImage;
786 }
787
788 for (i_key = 0; i_key < chars_per_pixel; i_key++)
789 {
790 key[i_key] = (wxChar)xpmImgLine[chars_per_pixel * i + i_key];
791 }
792
793 entry = clr_tbl.find(key);
794 if ( entry == end )
795 {
796 wxLogError(_("XPM: Malformed pixel data!"));
797
798 // better return right now as otherwise we risk to flood the
799 // user with error messages as something seems to be seriously
800 // wrong with the file and so we could give this message for
801 // each remaining pixel if we don't bail out
802 return wxNullImage;
803 }
804 else
805 {
806 img_data[0] = entry->second.R;
807 img_data[1] = entry->second.G;
808 img_data[2] = entry->second.B;
809 }
810 }
811 }
812
813 return img;
814 }
815
816 #endif // wxUSE_IMAGE && wxUSE_XPM