src/common/xpmdecod.cpp

   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 #ifdef __GNUG__
  94 #pragma implementation "xpmdecod.h"
  95 #endif
  96
  97 // For compilers that support precompilation, includes "wx.h".
  98 #include "wx/wxprec.h"
  99
 100 #ifdef __BORLANDC__
 101 #  pragma hdrstop
 102 #endif
 103
 104 #ifndef WX_PRECOMP
 105 #  include "wx/defs.h"
 106 #endif
 107
 108
 109 #include "wx/stream.h"
 110 #include "wx/image.h"
 111 #include "wx/utils.h"
 112 #include "wx/log.h"
 113 #include "wx/intl.h"
 114 #include <string.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     stream.Read(buf, 9);
 124     stream.SeekI(-9, wxFromCurrent);
 125
 126     return (memcmp(buf, "/* XPM */", 9) == 0);
 127 }
 128
 129 wxImage wxXPMDecoder::ReadFile(wxInputStream& stream)
 130 {
 131     size_t length = stream.GetSize();
 132     wxCHECK_MSG(length != 0, wxNullImage, wxT("Cannot read XPM from stream of unknown size"));
 133
 134     char *xpm_buffer = new char[length];
 135     char *p, *q;
 136     size_t i;
 137
 138     if ( stream.Read(xpm_buffer, length).LastError() == wxSTREAM_READ_ERROR )
 139         return FALSE;
 140
 141     /*
 142      *  Remove comments from the file:
 143      */
 144     for (p = xpm_buffer; *p != '\0'; p++)
 145     {
 146         if ( (*p == '"') || (*p == '\'') )
 147         {
 148             if (*p == '"')
 149             {
 150               for (p++; *p != '\0'; p++)
 151                 if ( (*p == '"') && (*(p - 1) != '\\') )
 152                     break;
 153             }
 154             else // *p == '\''
 155             {
 156                 for (p++; *p != '\0'; p++)
 157                     if ( (*p == '\'') && (*(p - 1) != '\\') )
 158                         break;
 159             }
 160             if (*p == '\0')
 161                 break;
 162             continue;
 163         }
 164         if ( (*p != '/') || (*(p + 1) != '*') )
 165             continue;
 166         for (q = p + 2; *q != '\0'; q++)
 167         {
 168             if ( (*q == '*') && (*(q + 1) == '/') )
 169                 break;
 170         }
 171         strcpy(p, q + 2);
 172     }
 173
 174     /*
 175      *  Remove unquoted characters:
 176      */
 177     i = 0;
 178     for (p = xpm_buffer; *p != '\0'; p++)
 179     {
 180         if ( *p != '"' )
 181             continue;
 182         for (q = p + 1; *q != '\0'; q++)
 183             if (*q == '"')
 184                 break;
 185         strncpy(xpm_buffer + i, p + 1, q - p - 1);
 186         i += q - p - 1;
 187         xpm_buffer[i++] = '\n';
 188         p = q + 1;
 189     }
 190     xpm_buffer[i] = '\0';
 191
 192     /*
 193      *  Create array of lines and convert \n's to \0's:
 194      */
 195     const char **xpm_lines;
 196     size_t lines_cnt = 0;
 197     size_t line;
 198
 199     for (p = xpm_buffer; *p != '\0'; p++)
 200     {
 201         if ( *p == '\n' )
 202             lines_cnt++;
 203     }
 204
 205     xpm_lines = new const char*[lines_cnt];
 206     xpm_lines[0] = xpm_buffer;
 207     line = 1;
 208     for (p = xpm_buffer; (*p != '\0') && (line < lines_cnt); p++)
 209     {
 210         if ( *p == '\n' )
 211         {
 212             xpm_lines[line] = p + 1;
 213             *p = '\0';
 214             line++;
 215         }
 216     }
 217
 218     /*
 219      *  Read the image:
 220      */
 221     wxImage img = ReadData(xpm_lines);
 222
 223     delete[] xpm_buffer;
 224 #ifdef __WIN16__
 225     delete[] (char**) xpm_lines;
 226 #else
 227     delete[] xpm_lines;
 228 #endif
 229     return img;
 230 }
 231 #endif // wxUSE_STREAMS
 232
 233
 234 /*****************************************************************************\
 235 * rgbtab.h                                                                    *
 236 *                                                                             *
 237 * A hard coded rgb.txt. To keep it short I removed all colornames with        *
 238 * trailing numbers, Blue3 etc, except the GrayXX. Sorry Grey-lovers I prefer  *
 239 * Gray ;-). But Grey is recognized on lookups, only on save Gray will be      *
 240 * used, maybe you want to do some substitue there too.                        *
 241 *                                                                             *
 242 * To save memory the RGBs are coded in one long value, as done by the RGB     *
 243 * macro.                                                                      *
 244 *                                                                             *
 245 * Developed by HeDu 3/94 (hedu@cul-ipn.uni-kiel.de)                           *
 246 \*****************************************************************************/
 247
 248
 249 typedef struct
 250 {
 251     char *name;
 252     wxUint32 rgb;
 253 } rgbRecord;
 254
 255 #define myRGB(r,g,b)   ((wxUint32)r<<16|(wxUint32)g<<8|(wxUint32)b)
 256
 257 static rgbRecord theRGBRecords[] =
 258 {
 259     {"aliceblue", myRGB(240, 248, 255)},
 260     {"antiquewhite", myRGB(250, 235, 215)},
 261     {"aquamarine", myRGB(50, 191, 193)},
 262     {"azure", myRGB(240, 255, 255)},
 263     {"beige", myRGB(245, 245, 220)},
 264     {"bisque", myRGB(255, 228, 196)},
 265     {"black", myRGB(0, 0, 0)},
 266     {"blanchedalmond", myRGB(255, 235, 205)},
 267     {"blue", myRGB(0, 0, 255)},
 268     {"blueviolet", myRGB(138, 43, 226)},
 269     {"brown", myRGB(165, 42, 42)},
 270     {"burlywood", myRGB(222, 184, 135)},
 271     {"cadetblue", myRGB(95, 146, 158)},
 272     {"chartreuse", myRGB(127, 255, 0)},
 273     {"chocolate", myRGB(210, 105, 30)},
 274     {"coral", myRGB(255, 114, 86)},
 275     {"cornflowerblue", myRGB(34, 34, 152)},
 276     {"cornsilk", myRGB(255, 248, 220)},
 277     {"cyan", myRGB(0, 255, 255)},
 278     {"darkgoldenrod", myRGB(184, 134, 11)},
 279     {"darkgreen", myRGB(0, 86, 45)},
 280     {"darkkhaki", myRGB(189, 183, 107)},
 281     {"darkolivegreen", myRGB(85, 86, 47)},
 282     {"darkorange", myRGB(255, 140, 0)},
 283     {"darkorchid", myRGB(139, 32, 139)},
 284     {"darksalmon", myRGB(233, 150, 122)},
 285     {"darkseagreen", myRGB(143, 188, 143)},
 286     {"darkslateblue", myRGB(56, 75, 102)},
 287     {"darkslategray", myRGB(47, 79, 79)},
 288     {"darkturquoise", myRGB(0, 166, 166)},
 289     {"darkviolet", myRGB(148, 0, 211)},
 290     {"deeppink", myRGB(255, 20, 147)},
 291     {"deepskyblue", myRGB(0, 191, 255)},
 292     {"dimgray", myRGB(84, 84, 84)},
 293     {"dodgerblue", myRGB(30, 144, 255)},
 294     {"firebrick", myRGB(142, 35, 35)},
 295     {"floralwhite", myRGB(255, 250, 240)},
 296     {"forestgreen", myRGB(80, 159, 105)},
 297     {"gainsboro", myRGB(220, 220, 220)},
 298     {"ghostwhite", myRGB(248, 248, 255)},
 299     {"gold", myRGB(218, 170, 0)},
 300     {"goldenrod", myRGB(239, 223, 132)},
 301     {"gray", myRGB(126, 126, 126)},
 302     {"gray0", myRGB(0, 0, 0)},
 303     {"gray1", myRGB(3, 3, 3)},
 304     {"gray10", myRGB(26, 26, 26)},
 305     {"gray100", myRGB(255, 255, 255)},
 306     {"gray11", myRGB(28, 28, 28)},
 307     {"gray12", myRGB(31, 31, 31)},
 308     {"gray13", myRGB(33, 33, 33)},
 309     {"gray14", myRGB(36, 36, 36)},
 310     {"gray15", myRGB(38, 38, 38)},
 311     {"gray16", myRGB(41, 41, 41)},
 312     {"gray17", myRGB(43, 43, 43)},
 313     {"gray18", myRGB(46, 46, 46)},
 314     {"gray19", myRGB(48, 48, 48)},
 315     {"gray2", myRGB(5, 5, 5)},
 316     {"gray20", myRGB(51, 51, 51)},
 317     {"gray21", myRGB(54, 54, 54)},
 318     {"gray22", myRGB(56, 56, 56)},
 319     {"gray23", myRGB(59, 59, 59)},
 320     {"gray24", myRGB(61, 61, 61)},
 321     {"gray25", myRGB(64, 64, 64)},
 322     {"gray26", myRGB(66, 66, 66)},
 323     {"gray27", myRGB(69, 69, 69)},
 324     {"gray28", myRGB(71, 71, 71)},
 325     {"gray29", myRGB(74, 74, 74)},
 326     {"gray3", myRGB(8, 8, 8)},
 327     {"gray30", myRGB(77, 77, 77)},
 328     {"gray31", myRGB(79, 79, 79)},
 329     {"gray32", myRGB(82, 82, 82)},
 330     {"gray33", myRGB(84, 84, 84)},
 331     {"gray34", myRGB(87, 87, 87)},
 332     {"gray35", myRGB(89, 89, 89)},
 333     {"gray36", myRGB(92, 92, 92)},
 334     {"gray37", myRGB(94, 94, 94)},
 335     {"gray38", myRGB(97, 97, 97)},
 336     {"gray39", myRGB(99, 99, 99)},
 337     {"gray4", myRGB(10, 10, 10)},
 338     {"gray40", myRGB(102, 102, 102)},
 339     {"gray41", myRGB(105, 105, 105)},
 340     {"gray42", myRGB(107, 107, 107)},
 341     {"gray43", myRGB(110, 110, 110)},
 342     {"gray44", myRGB(112, 112, 112)},
 343     {"gray45", myRGB(115, 115, 115)},
 344     {"gray46", myRGB(117, 117, 117)},
 345     {"gray47", myRGB(120, 120, 120)},
 346     {"gray48", myRGB(122, 122, 122)},
 347     {"gray49", myRGB(125, 125, 125)},
 348     {"gray5", myRGB(13, 13, 13)},
 349     {"gray50", myRGB(127, 127, 127)},
 350     {"gray51", myRGB(130, 130, 130)},
 351     {"gray52", myRGB(133, 133, 133)},
 352     {"gray53", myRGB(135, 135, 135)},
 353     {"gray54", myRGB(138, 138, 138)},
 354     {"gray55", myRGB(140, 140, 140)},
 355     {"gray56", myRGB(143, 143, 143)},
 356     {"gray57", myRGB(145, 145, 145)},
 357     {"gray58", myRGB(148, 148, 148)},
 358     {"gray59", myRGB(150, 150, 150)},
 359     {"gray6", myRGB(15, 15, 15)},
 360     {"gray60", myRGB(153, 153, 153)},
 361     {"gray61", myRGB(156, 156, 156)},
 362     {"gray62", myRGB(158, 158, 158)},
 363     {"gray63", myRGB(161, 161, 161)},
 364     {"gray64", myRGB(163, 163, 163)},
 365     {"gray65", myRGB(166, 166, 166)},
 366     {"gray66", myRGB(168, 168, 168)},
 367     {"gray67", myRGB(171, 171, 171)},
 368     {"gray68", myRGB(173, 173, 173)},
 369     {"gray69", myRGB(176, 176, 176)},
 370     {"gray7", myRGB(18, 18, 18)},
 371     {"gray70", myRGB(179, 179, 179)},
 372     {"gray71", myRGB(181, 181, 181)},
 373     {"gray72", myRGB(184, 184, 184)},
 374     {"gray73", myRGB(186, 186, 186)},
 375     {"gray74", myRGB(189, 189, 189)},
 376     {"gray75", myRGB(191, 191, 191)},
 377     {"gray76", myRGB(194, 194, 194)},
 378     {"gray77", myRGB(196, 196, 196)},
 379     {"gray78", myRGB(199, 199, 199)},
 380     {"gray79", myRGB(201, 201, 201)},
 381     {"gray8", myRGB(20, 20, 20)},
 382     {"gray80", myRGB(204, 204, 204)},
 383     {"gray81", myRGB(207, 207, 207)},
 384     {"gray82", myRGB(209, 209, 209)},
 385     {"gray83", myRGB(212, 212, 212)},
 386     {"gray84", myRGB(214, 214, 214)},
 387     {"gray85", myRGB(217, 217, 217)},
 388     {"gray86", myRGB(219, 219, 219)},
 389     {"gray87", myRGB(222, 222, 222)},
 390     {"gray88", myRGB(224, 224, 224)},
 391     {"gray89", myRGB(227, 227, 227)},
 392     {"gray9", myRGB(23, 23, 23)},
 393     {"gray90", myRGB(229, 229, 229)},
 394     {"gray91", myRGB(232, 232, 232)},
 395     {"gray92", myRGB(235, 235, 235)},
 396     {"gray93", myRGB(237, 237, 237)},
 397     {"gray94", myRGB(240, 240, 240)},
 398     {"gray95", myRGB(242, 242, 242)},
 399     {"gray96", myRGB(245, 245, 245)},
 400     {"gray97", myRGB(247, 247, 247)},
 401     {"gray98", myRGB(250, 250, 250)},
 402     {"gray99", myRGB(252, 252, 252)},
 403     {"green", myRGB(0, 255, 0)},
 404     {"greenyellow", myRGB(173, 255, 47)},
 405     {"honeydew", myRGB(240, 255, 240)},
 406     {"hotpink", myRGB(255, 105, 180)},
 407     {"indianred", myRGB(107, 57, 57)},
 408     {"ivory", myRGB(255, 255, 240)},
 409     {"khaki", myRGB(179, 179, 126)},
 410     {"lavender", myRGB(230, 230, 250)},
 411     {"lavenderblush", myRGB(255, 240, 245)},
 412     {"lawngreen", myRGB(124, 252, 0)},
 413     {"lemonchiffon", myRGB(255, 250, 205)},
 414     {"lightblue", myRGB(176, 226, 255)},
 415     {"lightcoral", myRGB(240, 128, 128)},
 416     {"lightcyan", myRGB(224, 255, 255)},
 417     {"lightgoldenrod", myRGB(238, 221, 130)},
 418     {"lightgoldenrodyellow", myRGB(250, 250, 210)},
 419     {"lightgray", myRGB(168, 168, 168)},
 420     {"lightpink", myRGB(255, 182, 193)},
 421     {"lightsalmon", myRGB(255, 160, 122)},
 422     {"lightseagreen", myRGB(32, 178, 170)},
 423     {"lightskyblue", myRGB(135, 206, 250)},
 424     {"lightslateblue", myRGB(132, 112, 255)},
 425     {"lightslategray", myRGB(119, 136, 153)},
 426     {"lightsteelblue", myRGB(124, 152, 211)},
 427     {"lightyellow", myRGB(255, 255, 224)},
 428     {"limegreen", myRGB(0, 175, 20)},
 429     {"linen", myRGB(250, 240, 230)},
 430     {"magenta", myRGB(255, 0, 255)},
 431     {"maroon", myRGB(143, 0, 82)},
 432     {"mediumaquamarine", myRGB(0, 147, 143)},
 433     {"mediumblue", myRGB(50, 50, 204)},
 434     {"mediumforestgreen", myRGB(50, 129, 75)},
 435     {"mediumgoldenrod", myRGB(209, 193, 102)},
 436     {"mediumorchid", myRGB(189, 82, 189)},
 437     {"mediumpurple", myRGB(147, 112, 219)},
 438     {"mediumseagreen", myRGB(52, 119, 102)},
 439     {"mediumslateblue", myRGB(106, 106, 141)},
 440     {"mediumspringgreen", myRGB(35, 142, 35)},
 441     {"mediumturquoise", myRGB(0, 210, 210)},
 442     {"mediumvioletred", myRGB(213, 32, 121)},
 443     {"midnightblue", myRGB(47, 47, 100)},
 444     {"mintcream", myRGB(245, 255, 250)},
 445     {"mistyrose", myRGB(255, 228, 225)},
 446     {"moccasin", myRGB(255, 228, 181)},
 447     {"navajowhite", myRGB(255, 222, 173)},
 448     {"navy", myRGB(35, 35, 117)},
 449     {"navyblue", myRGB(35, 35, 117)},
 450     {"oldlace", myRGB(253, 245, 230)},
 451     {"olivedrab", myRGB(107, 142, 35)},
 452     {"orange", myRGB(255, 135, 0)},
 453     {"orangered", myRGB(255, 69, 0)},
 454     {"orchid", myRGB(239, 132, 239)},
 455     {"palegoldenrod", myRGB(238, 232, 170)},
 456     {"palegreen", myRGB(115, 222, 120)},
 457     {"paleturquoise", myRGB(175, 238, 238)},
 458     {"palevioletred", myRGB(219, 112, 147)},
 459     {"papayawhip", myRGB(255, 239, 213)},
 460     {"peachpuff", myRGB(255, 218, 185)},
 461     {"peru", myRGB(205, 133, 63)},
 462     {"pink", myRGB(255, 181, 197)},
 463     {"plum", myRGB(197, 72, 155)},
 464     {"powderblue", myRGB(176, 224, 230)},
 465     {"purple", myRGB(160, 32, 240)},
 466     {"red", myRGB(255, 0, 0)},
 467     {"rosybrown", myRGB(188, 143, 143)},
 468     {"royalblue", myRGB(65, 105, 225)},
 469     {"saddlebrown", myRGB(139, 69, 19)},
 470     {"salmon", myRGB(233, 150, 122)},
 471     {"sandybrown", myRGB(244, 164, 96)},
 472     {"seagreen", myRGB(82, 149, 132)},
 473     {"seashell", myRGB(255, 245, 238)},
 474     {"sienna", myRGB(150, 82, 45)},
 475     {"skyblue", myRGB(114, 159, 255)},
 476     {"slateblue", myRGB(126, 136, 171)},
 477     {"slategray", myRGB(112, 128, 144)},
 478     {"snow", myRGB(255, 250, 250)},
 479     {"springgreen", myRGB(65, 172, 65)},
 480     {"steelblue", myRGB(84, 112, 170)},
 481     {"tan", myRGB(222, 184, 135)},
 482     {"thistle", myRGB(216, 191, 216)},
 483     {"tomato", myRGB(255, 99, 71)},
 484     {"transparent", myRGB(0, 0, 1)},
 485     {"turquoise", myRGB(25, 204, 223)},
 486     {"violet", myRGB(156, 62, 206)},
 487     {"violetred", myRGB(243, 62, 150)},
 488     {"wheat", myRGB(245, 222, 179)},
 489     {"white", myRGB(255, 255, 255)},
 490     {"whitesmoke", myRGB(245, 245, 245)},
 491     {"yellow", myRGB(255, 255, 0)},
 492     {"yellowgreen", myRGB(50, 216, 56)},
 493     {NULL, myRGB(0, 0, 0)}
 494 };
 495 static int numTheRGBRecords = 234;
 496
 497 static unsigned char ParseHexadecimal(char digit1, char digit2)
 498 {
 499     unsigned char i1, i2;
 500
 501     if (digit1 >= 'a')
 502         i1 = digit1 - 'a' + 0x0A;
 503     else if (digit1 >= 'A')
 504         i1 = digit1 - 'A' + 0x0A;
 505     else
 506         i1 = digit1 - '0';
 507     if (digit2 >= 'a')
 508         i2 = digit2 - 'a' + 0x0A;
 509     else if (digit2 >= 'A')
 510         i2 = digit2 - 'A' + 0x0A;
 511     else
 512         i2 = digit2 - '0';
 513     return (0x10 * i1 + i2);
 514 }
 515
 516 static bool GetRGBFromName(const char *inname, bool *isNone,
 517                            unsigned char *r, unsigned char*g, unsigned char *b)
 518 {
 519     int left, right, middle;
 520     int cmp;
 521     wxUint32 rgbVal;
 522     char *name;
 523     char *grey, *p;
 524
 525     // #rrggbb are not in database, we parse them directly
 526     if ( *inname == '#' && strlen(inname) == 7 )
 527     {
 528         *r = ParseHexadecimal(inname[1], inname[2]);
 529         *g = ParseHexadecimal(inname[3], inname[4]);
 530         *b = ParseHexadecimal(inname[5], inname[6]);
 531         *isNone = FALSE;
 532         return TRUE;
 533     }
 534
 535     name = strdup(inname);
 536
 537     // theRGBRecords[] has no names with spaces, and no grey, but a
 538     // lot of gray...
 539
 540     // so first extract ' '
 541     while ((p = strchr(name, ' ')) != NULL)
 542     {
 543         while (*(p))            // till eof of string
 544         {
 545             *p = *(p + 1);      // copy to the left
 546             p++;
 547         }
 548     }
 549     // fold to lower case
 550     p = name;
 551     while (*p)
 552     {
 553         *p = tolower(*p);
 554         p++;
 555     }
 556
 557     // substitute Grey with Gray, else rgbtab.h would have more than 100
 558     // 'duplicate' entries
 559     if ( (grey = strstr(name, "grey")) != NULL )
 560         grey[2] = 'a';
 561
 562     // check for special 'none' colour:
 563     bool found;
 564     if ( strcmp(name, "none") == 0 )
 565     {
 566         *isNone = TRUE;
 567         found = TRUE;
 568     }
 569     else // not "None"
 570     {
 571         found = FALSE;
 572
 573         // binary search:
 574         left = 0;
 575         right = numTheRGBRecords - 1;
 576         do
 577         {
 578             middle = (left + right) / 2;
 579             cmp = strcmp(name, theRGBRecords[middle].name);
 580             if ( cmp == 0 )
 581             {
 582                 rgbVal = theRGBRecords[middle].rgb;
 583                 *r = (unsigned char)((rgbVal >> 16) & 0xFF);
 584                 *g = (unsigned char)((rgbVal >> 8) & 0xFF);
 585                 *b = (unsigned char)((rgbVal) & 0xFF);
 586                 *isNone = FALSE;
 587                 found = TRUE;
 588                 break;
 589             }
 590             else if ( cmp < 0 )
 591             {
 592                 right = middle - 1;
 593             }
 594             else // cmp > 0
 595             {
 596                 left = middle + 1;
 597             }
 598         } while (left <= right);
 599     }
 600
 601     free(name);
 602
 603     return found;
 604 }
 605
 606 static const char *ParseColor(const char *data)
 607 {
 608     static const char *targets[] =
 609                         {"c ", "g ", "g4 ", "m ", "b ", "s ", NULL};
 610
 611     const char *p, *r;
 612     const char *q;
 613     int i;
 614
 615     for (i = 0; targets[i] != NULL; i++)
 616     {
 617         r = data;
 618         for (q = targets[i]; *r != '\0'; r++)
 619         {
 620             if ( *r != *q )
 621                 continue;
 622             if ( !isspace((int) (*(r - 1))) )
 623                 continue;
 624             p = r;
 625             for (;;)
 626             {
 627                 if ( *q == '\0' )
 628                     return p;
 629                 if ( *p++ != *q++ )
 630                     break;
 631             }
 632             q = targets[i];
 633         }
 634     }
 635     return NULL;
 636 }
 637
 638 class wxXPMColourMapData : public wxObject
 639 {
 640     public:
 641         unsigned char R,G,B;
 642 };
 643
 644 wxImage wxXPMDecoder::ReadData(const char **xpm_data)
 645 {
 646     wxImage img;
 647     int count;
 648     unsigned width, height, colors_cnt, chars_per_pixel;
 649     size_t i, j, i_key;
 650     wxChar key[64];
 651     const char *clr_def;
 652     bool hasMask;
 653     wxXPMColourMapData *clr_data;
 654     wxHashTable clr_tbl(wxKEY_STRING);
 655
 656     /*
 657      *  Read hints and initialize structures:
 658      */
 659
 660     count = sscanf(xpm_data[0], "%u %u %u %u",
 661                    &width, &height, &colors_cnt, &chars_per_pixel);
 662     if ( count != 4 || width * height * colors_cnt == 0 )
 663     {
 664         wxLogError(_T("XPM: Not XPM data!"));
 665         return wxNullImage;
 666     }
 667
 668     // VS: XPM color map this large would be insane, since XPMs are encoded with
 669     //     92 possible values on each position, 92^64 is *way* larger space than
 670     //     8bit RGB...
 671     wxCHECK_MSG(chars_per_pixel < 64, wxNullImage, wxT("XPM colormaps this large not supported."));
 672
 673     img.Create(width, height);
 674     if ( !img.Ok() ) return img;
 675
 676     img.SetMask(FALSE);
 677     key[chars_per_pixel] = wxT('\0');
 678     hasMask = FALSE;
 679     clr_tbl.DeleteContents(TRUE);
 680
 681     /*
 682      *  Create colour map:
 683      */
 684     for (i = 0; i < colors_cnt; i++)
 685     {
 686         for (i_key = 0; i_key < chars_per_pixel; i_key++)
 687             key[i_key] = (wxChar)xpm_data[1 + i][i_key];
 688         clr_def = ParseColor(xpm_data[1 + i]);
 689         clr_data = new wxXPMColourMapData;
 690
 691         if ( clr_def == NULL )
 692         {
 693             wxLogError(_("XPM: malformed colour definition '%s'!"), xpm_data[1+i]);
 694             clr_data->R = 255, clr_data->G = 0, clr_data->B = 255;
 695         }
 696         else
 697         {
 698             bool isNone;
 699             if ( !GetRGBFromName(clr_def, &isNone,
 700                                  &clr_data->R, &clr_data->G, &clr_data->B) )
 701             {
 702                 wxLogError(_("XPM: malformed colour definition '%s'!"), xpm_data[1+i]);
 703                 clr_data->R = 255, clr_data->G = 0, clr_data->B = 255;
 704             }
 705             else
 706             {
 707                 if ( isNone )
 708                 {
 709                     img.SetMask(TRUE);
 710                     img.SetMaskColour(255, 0, 255);
 711                     hasMask = TRUE;
 712                     clr_data->R = 255, clr_data->G = 0, clr_data->B = 255;
 713                 }
 714                 else
 715                 {
 716                     if ( hasMask && clr_data->R == 255 &&
 717                                     clr_data->G == 0 && clr_data->B == 255 )
 718                         clr_data->B = 254;
 719                 }
 720             }
 721         }
 722         clr_tbl.Put(key, clr_data);
 723     }
 724
 725     /*
 726      *  Parse image data:
 727      */
 728
 729     unsigned char *img_data = img.GetData();
 730     for (j = 0; j < height; j++)
 731     {
 732         for (i = 0; i < width; i++, img_data += 3)
 733         {
 734             for (i_key = 0; i_key < chars_per_pixel; i_key++)
 735                 key[i_key] = (wxChar)xpm_data[1 + colors_cnt + j]
 736                                              [chars_per_pixel * i + i_key];
 737             clr_data = (wxXPMColourMapData*) clr_tbl.Get(key);
 738             if ( clr_data == NULL )
 739             {
 740                 wxLogError(_("XPM: Malformed pixel data!"));
 741             }
 742             else
 743             {
 744                 img_data[0] = clr_data->R;
 745                 img_data[1] = clr_data->G;
 746                 img_data[2] = clr_data->B;
 747             }
 748         }
 749     }
 750
 751     return img;
 752 }
 753
 754