src/common/xpmdecod.cpp

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