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 #if wxUSE_IMAGE && wxUSE_XPM
 109
 110 #include "wx/stream.h"
 111 #include "wx/image.h"
 112 #include "wx/utils.h"
 113 #include "wx/log.h"
 114 #include "wx/intl.h"
 115 #include <string.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     stream.Read(buf, 9);
 125     stream.SeekI(-9, wxFromCurrent);
 126
 127     return (memcmp(buf, "/* XPM */", 9) == 0);
 128 }
 129
 130 wxImage wxXPMDecoder::ReadFile(wxInputStream& stream)
 131 {
 132     size_t length = stream.GetSize();
 133     wxCHECK_MSG(length != 0, wxNullImage, wxT("Cannot read XPM from stream of unknown size"));
 134
 135     char *xpm_buffer = new char[length];
 136     char *p, *q;
 137     size_t i;
 138
 139     if ( stream.Read(xpm_buffer, length).LastError() == wxSTREAM_READ_ERROR )
 140         return FALSE;
 141
 142     /*
 143      *  Remove comments from the file:
 144      */
 145     for (p = xpm_buffer; *p != '\0'; p++)
 146     {
 147         if ( (*p == '"') || (*p == '\'') )
 148         {
 149             if (*p == '"')
 150             {
 151               for (p++; *p != '\0'; p++)
 152                 if ( (*p == '"') && (*(p - 1) != '\\') )
 153                     break;
 154             }
 155             else // *p == '\''
 156             {
 157                 for (p++; *p != '\0'; p++)
 158                     if ( (*p == '\'') && (*(p - 1) != '\\') )
 159                         break;
 160             }
 161             if (*p == '\0')
 162                 break;
 163             continue;
 164         }
 165         if ( (*p != '/') || (*(p + 1) != '*') )
 166             continue;
 167         for (q = p + 2; *q != '\0'; q++)
 168         {
 169             if ( (*q == '*') && (*(q + 1) == '/') )
 170                 break;
 171         }
 172         strcpy(p, q + 2);
 173     }
 174
 175     /*
 176      *  Remove unquoted characters:
 177      */
 178     i = 0;
 179     for (p = xpm_buffer; *p != '\0'; p++)
 180     {
 181         if ( *p != '"' )
 182             continue;
 183         for (q = p + 1; *q != '\0'; q++)
 184             if (*q == '"')
 185                 break;
 186         strncpy(xpm_buffer + i, p + 1, q - p - 1);
 187         i += q - p - 1;
 188         xpm_buffer[i++] = '\n';
 189         p = q + 1;
 190     }
 191     xpm_buffer[i] = '\0';
 192
 193     /*
 194      *  Create array of lines and convert \n's to \0's:
 195      */
 196     const char **xpm_lines;
 197     size_t lines_cnt = 0;
 198     size_t line;
 199
 200     for (p = xpm_buffer; *p != '\0'; p++)
 201     {
 202         if ( *p == '\n' )
 203             lines_cnt++;
 204     }
 205
 206     xpm_lines = new const char*[lines_cnt];
 207     xpm_lines[0] = xpm_buffer;
 208     line = 1;
 209     for (p = xpm_buffer; (*p != '\0') && (line < lines_cnt); p++)
 210     {
 211         if ( *p == '\n' )
 212         {
 213             xpm_lines[line] = p + 1;
 214             *p = '\0';
 215             line++;
 216         }
 217     }
 218
 219     /*
 220      *  Read the image:
 221      */
 222     wxImage img = ReadData(xpm_lines);
 223
 224     delete[] xpm_buffer;
 225 #ifdef __WIN16__
 226     delete[] (char**) xpm_lines;
 227 #else
 228     delete[] xpm_lines;
 229 #endif
 230     return img;
 231 }
 232 #endif // wxUSE_STREAMS
 233
 234
 235 /*****************************************************************************\
 236 * rgbtab.h                                                                    *
 237 *                                                                             *
 238 * A hard coded rgb.txt. To keep it short I removed all colornames with        *
 239 * trailing numbers, Blue3 etc, except the GrayXX. Sorry Grey-lovers I prefer  *
 240 * Gray ;-). But Grey is recognized on lookups, only on save Gray will be      *
 241 * used, maybe you want to do some substitue there too.                        *
 242 *                                                                             *
 243 * To save memory the RGBs are coded in one long value, as done by the RGB     *
 244 * macro.                                                                      *
 245 *                                                                             *
 246 * Developed by HeDu 3/94 (hedu@cul-ipn.uni-kiel.de)                           *
 247 \*****************************************************************************/
 248
 249
 250 typedef struct
 251 {
 252     char *name;
 253     wxUint32 rgb;
 254 } rgbRecord;
 255
 256 #define myRGB(r,g,b)   ((wxUint32)r<<16|(wxUint32)g<<8|(wxUint32)b)
 257
 258 static rgbRecord theRGBRecords[] =
 259 {
 260     {"aliceblue", myRGB(240, 248, 255)},
 261     {"antiquewhite", myRGB(250, 235, 215)},
 262     {"aquamarine", myRGB(50, 191, 193)},
 263     {"azure", myRGB(240, 255, 255)},
 264     {"beige", myRGB(245, 245, 220)},
 265     {"bisque", myRGB(255, 228, 196)},
 266     {"black", myRGB(0, 0, 0)},
 267     {"blanchedalmond", myRGB(255, 235, 205)},
 268     {"blue", myRGB(0, 0, 255)},
 269     {"blueviolet", myRGB(138, 43, 226)},
 270     {"brown", myRGB(165, 42, 42)},
 271     {"burlywood", myRGB(222, 184, 135)},
 272     {"cadetblue", myRGB(95, 146, 158)},
 273     {"chartreuse", myRGB(127, 255, 0)},
 274     {"chocolate", myRGB(210, 105, 30)},
 275     {"coral", myRGB(255, 114, 86)},
 276     {"cornflowerblue", myRGB(34, 34, 152)},
 277     {"cornsilk", myRGB(255, 248, 220)},
 278     {"cyan", myRGB(0, 255, 255)},
 279     {"darkgoldenrod", myRGB(184, 134, 11)},
 280     {"darkgreen", myRGB(0, 86, 45)},
 281     {"darkkhaki", myRGB(189, 183, 107)},
 282     {"darkolivegreen", myRGB(85, 86, 47)},
 283     {"darkorange", myRGB(255, 140, 0)},
 284     {"darkorchid", myRGB(139, 32, 139)},
 285     {"darksalmon", myRGB(233, 150, 122)},
 286     {"darkseagreen", myRGB(143, 188, 143)},
 287     {"darkslateblue", myRGB(56, 75, 102)},
 288     {"darkslategray", myRGB(47, 79, 79)},
 289     {"darkturquoise", myRGB(0, 166, 166)},
 290     {"darkviolet", myRGB(148, 0, 211)},
 291     {"deeppink", myRGB(255, 20, 147)},
 292     {"deepskyblue", myRGB(0, 191, 255)},
 293     {"dimgray", myRGB(84, 84, 84)},
 294     {"dodgerblue", myRGB(30, 144, 255)},
 295     {"firebrick", myRGB(142, 35, 35)},
 296     {"floralwhite", myRGB(255, 250, 240)},
 297     {"forestgreen", myRGB(80, 159, 105)},
 298     {"gainsboro", myRGB(220, 220, 220)},
 299     {"ghostwhite", myRGB(248, 248, 255)},
 300     {"gold", myRGB(218, 170, 0)},
 301     {"goldenrod", myRGB(239, 223, 132)},
 302     {"gray", myRGB(126, 126, 126)},
 303     {"gray0", myRGB(0, 0, 0)},
 304     {"gray1", myRGB(3, 3, 3)},
 305     {"gray10", myRGB(26, 26, 26)},
 306     {"gray100", myRGB(255, 255, 255)},
 307     {"gray11", myRGB(28, 28, 28)},
 308     {"gray12", myRGB(31, 31, 31)},
 309     {"gray13", myRGB(33, 33, 33)},
 310     {"gray14", myRGB(36, 36, 36)},
 311     {"gray15", myRGB(38, 38, 38)},
 312     {"gray16", myRGB(41, 41, 41)},
 313     {"gray17", myRGB(43, 43, 43)},
 314     {"gray18", myRGB(46, 46, 46)},
 315     {"gray19", myRGB(48, 48, 48)},
 316     {"gray2", myRGB(5, 5, 5)},
 317     {"gray20", myRGB(51, 51, 51)},
 318     {"gray21", myRGB(54, 54, 54)},
 319     {"gray22", myRGB(56, 56, 56)},
 320     {"gray23", myRGB(59, 59, 59)},
 321     {"gray24", myRGB(61, 61, 61)},
 322     {"gray25", myRGB(64, 64, 64)},
 323     {"gray26", myRGB(66, 66, 66)},
 324     {"gray27", myRGB(69, 69, 69)},
 325     {"gray28", myRGB(71, 71, 71)},
 326     {"gray29", myRGB(74, 74, 74)},
 327     {"gray3", myRGB(8, 8, 8)},
 328     {"gray30", myRGB(77, 77, 77)},
 329     {"gray31", myRGB(79, 79, 79)},
 330     {"gray32", myRGB(82, 82, 82)},
 331     {"gray33", myRGB(84, 84, 84)},
 332     {"gray34", myRGB(87, 87, 87)},
 333     {"gray35", myRGB(89, 89, 89)},
 334     {"gray36", myRGB(92, 92, 92)},
 335     {"gray37", myRGB(94, 94, 94)},
 336     {"gray38", myRGB(97, 97, 97)},
 337     {"gray39", myRGB(99, 99, 99)},
 338     {"gray4", myRGB(10, 10, 10)},
 339     {"gray40", myRGB(102, 102, 102)},
 340     {"gray41", myRGB(105, 105, 105)},
 341     {"gray42", myRGB(107, 107, 107)},
 342     {"gray43", myRGB(110, 110, 110)},
 343     {"gray44", myRGB(112, 112, 112)},
 344     {"gray45", myRGB(115, 115, 115)},
 345     {"gray46", myRGB(117, 117, 117)},
 346     {"gray47", myRGB(120, 120, 120)},
 347     {"gray48", myRGB(122, 122, 122)},
 348     {"gray49", myRGB(125, 125, 125)},
 349     {"gray5", myRGB(13, 13, 13)},
 350     {"gray50", myRGB(127, 127, 127)},
 351     {"gray51", myRGB(130, 130, 130)},
 352     {"gray52", myRGB(133, 133, 133)},
 353     {"gray53", myRGB(135, 135, 135)},
 354     {"gray54", myRGB(138, 138, 138)},
 355     {"gray55", myRGB(140, 140, 140)},
 356     {"gray56", myRGB(143, 143, 143)},
 357     {"gray57", myRGB(145, 145, 145)},
 358     {"gray58", myRGB(148, 148, 148)},
 359     {"gray59", myRGB(150, 150, 150)},
 360     {"gray6", myRGB(15, 15, 15)},
 361     {"gray60", myRGB(153, 153, 153)},
 362     {"gray61", myRGB(156, 156, 156)},
 363     {"gray62", myRGB(158, 158, 158)},
 364     {"gray63", myRGB(161, 161, 161)},
 365     {"gray64", myRGB(163, 163, 163)},
 366     {"gray65", myRGB(166, 166, 166)},
 367     {"gray66", myRGB(168, 168, 168)},
 368     {"gray67", myRGB(171, 171, 171)},
 369     {"gray68", myRGB(173, 173, 173)},
 370     {"gray69", myRGB(176, 176, 176)},
 371     {"gray7", myRGB(18, 18, 18)},
 372     {"gray70", myRGB(179, 179, 179)},
 373     {"gray71", myRGB(181, 181, 181)},
 374     {"gray72", myRGB(184, 184, 184)},
 375     {"gray73", myRGB(186, 186, 186)},
 376     {"gray74", myRGB(189, 189, 189)},
 377     {"gray75", myRGB(191, 191, 191)},
 378     {"gray76", myRGB(194, 194, 194)},
 379     {"gray77", myRGB(196, 196, 196)},
 380     {"gray78", myRGB(199, 199, 199)},
 381     {"gray79", myRGB(201, 201, 201)},
 382     {"gray8", myRGB(20, 20, 20)},
 383     {"gray80", myRGB(204, 204, 204)},
 384     {"gray81", myRGB(207, 207, 207)},
 385     {"gray82", myRGB(209, 209, 209)},
 386     {"gray83", myRGB(212, 212, 212)},
 387     {"gray84", myRGB(214, 214, 214)},
 388     {"gray85", myRGB(217, 217, 217)},
 389     {"gray86", myRGB(219, 219, 219)},
 390     {"gray87", myRGB(222, 222, 222)},
 391     {"gray88", myRGB(224, 224, 224)},
 392     {"gray89", myRGB(227, 227, 227)},
 393     {"gray9", myRGB(23, 23, 23)},
 394     {"gray90", myRGB(229, 229, 229)},
 395     {"gray91", myRGB(232, 232, 232)},
 396     {"gray92", myRGB(235, 235, 235)},
 397     {"gray93", myRGB(237, 237, 237)},
 398     {"gray94", myRGB(240, 240, 240)},
 399     {"gray95", myRGB(242, 242, 242)},
 400     {"gray96", myRGB(245, 245, 245)},
 401     {"gray97", myRGB(247, 247, 247)},
 402     {"gray98", myRGB(250, 250, 250)},
 403     {"gray99", myRGB(252, 252, 252)},
 404     {"green", myRGB(0, 255, 0)},
 405     {"greenyellow", myRGB(173, 255, 47)},
 406     {"honeydew", myRGB(240, 255, 240)},
 407     {"hotpink", myRGB(255, 105, 180)},
 408     {"indianred", myRGB(107, 57, 57)},
 409     {"ivory", myRGB(255, 255, 240)},
 410     {"khaki", myRGB(179, 179, 126)},
 411     {"lavender", myRGB(230, 230, 250)},
 412     {"lavenderblush", myRGB(255, 240, 245)},
 413     {"lawngreen", myRGB(124, 252, 0)},
 414     {"lemonchiffon", myRGB(255, 250, 205)},
 415     {"lightblue", myRGB(176, 226, 255)},
 416     {"lightcoral", myRGB(240, 128, 128)},
 417     {"lightcyan", myRGB(224, 255, 255)},
 418     {"lightgoldenrod", myRGB(238, 221, 130)},
 419     {"lightgoldenrodyellow", myRGB(250, 250, 210)},
 420     {"lightgray", myRGB(168, 168, 168)},
 421     {"lightpink", myRGB(255, 182, 193)},
 422     {"lightsalmon", myRGB(255, 160, 122)},
 423     {"lightseagreen", myRGB(32, 178, 170)},
 424     {"lightskyblue", myRGB(135, 206, 250)},
 425     {"lightslateblue", myRGB(132, 112, 255)},
 426     {"lightslategray", myRGB(119, 136, 153)},
 427     {"lightsteelblue", myRGB(124, 152, 211)},
 428     {"lightyellow", myRGB(255, 255, 224)},
 429     {"limegreen", myRGB(0, 175, 20)},
 430     {"linen", myRGB(250, 240, 230)},
 431     {"magenta", myRGB(255, 0, 255)},
 432     {"maroon", myRGB(143, 0, 82)},
 433     {"mediumaquamarine", myRGB(0, 147, 143)},
 434     {"mediumblue", myRGB(50, 50, 204)},
 435     {"mediumforestgreen", myRGB(50, 129, 75)},
 436     {"mediumgoldenrod", myRGB(209, 193, 102)},
 437     {"mediumorchid", myRGB(189, 82, 189)},
 438     {"mediumpurple", myRGB(147, 112, 219)},
 439     {"mediumseagreen", myRGB(52, 119, 102)},
 440     {"mediumslateblue", myRGB(106, 106, 141)},
 441     {"mediumspringgreen", myRGB(35, 142, 35)},
 442     {"mediumturquoise", myRGB(0, 210, 210)},
 443     {"mediumvioletred", myRGB(213, 32, 121)},
 444     {"midnightblue", myRGB(47, 47, 100)},
 445     {"mintcream", myRGB(245, 255, 250)},
 446     {"mistyrose", myRGB(255, 228, 225)},
 447     {"moccasin", myRGB(255, 228, 181)},
 448     {"navajowhite", myRGB(255, 222, 173)},
 449     {"navy", myRGB(35, 35, 117)},
 450     {"navyblue", myRGB(35, 35, 117)},
 451     {"oldlace", myRGB(253, 245, 230)},
 452     {"olivedrab", myRGB(107, 142, 35)},
 453     {"orange", myRGB(255, 135, 0)},
 454     {"orangered", myRGB(255, 69, 0)},
 455     {"orchid", myRGB(239, 132, 239)},
 456     {"palegoldenrod", myRGB(238, 232, 170)},
 457     {"palegreen", myRGB(115, 222, 120)},
 458     {"paleturquoise", myRGB(175, 238, 238)},
 459     {"palevioletred", myRGB(219, 112, 147)},
 460     {"papayawhip", myRGB(255, 239, 213)},
 461     {"peachpuff", myRGB(255, 218, 185)},
 462     {"peru", myRGB(205, 133, 63)},
 463     {"pink", myRGB(255, 181, 197)},
 464     {"plum", myRGB(197, 72, 155)},
 465     {"powderblue", myRGB(176, 224, 230)},
 466     {"purple", myRGB(160, 32, 240)},
 467     {"red", myRGB(255, 0, 0)},
 468     {"rosybrown", myRGB(188, 143, 143)},
 469     {"royalblue", myRGB(65, 105, 225)},
 470     {"saddlebrown", myRGB(139, 69, 19)},
 471     {"salmon", myRGB(233, 150, 122)},
 472     {"sandybrown", myRGB(244, 164, 96)},
 473     {"seagreen", myRGB(82, 149, 132)},
 474     {"seashell", myRGB(255, 245, 238)},
 475     {"sienna", myRGB(150, 82, 45)},
 476     {"skyblue", myRGB(114, 159, 255)},
 477     {"slateblue", myRGB(126, 136, 171)},
 478     {"slategray", myRGB(112, 128, 144)},
 479     {"snow", myRGB(255, 250, 250)},
 480     {"springgreen", myRGB(65, 172, 65)},
 481     {"steelblue", myRGB(84, 112, 170)},
 482     {"tan", myRGB(222, 184, 135)},
 483     {"thistle", myRGB(216, 191, 216)},
 484     {"tomato", myRGB(255, 99, 71)},
 485     {"transparent", myRGB(0, 0, 1)},
 486     {"turquoise", myRGB(25, 204, 223)},
 487     {"violet", myRGB(156, 62, 206)},
 488     {"violetred", myRGB(243, 62, 150)},
 489     {"wheat", myRGB(245, 222, 179)},
 490     {"white", myRGB(255, 255, 255)},
 491     {"whitesmoke", myRGB(245, 245, 245)},
 492     {"yellow", myRGB(255, 255, 0)},
 493     {"yellowgreen", myRGB(50, 216, 56)},
 494     {NULL, myRGB(0, 0, 0)}
 495 };
 496 static int numTheRGBRecords = 234;
 497
 498 static unsigned char ParseHexadecimal(char digit1, char digit2)
 499 {
 500     unsigned char i1, i2;
 501
 502     if (digit1 >= 'a')
 503         i1 = digit1 - 'a' + 0x0A;
 504     else if (digit1 >= 'A')
 505         i1 = digit1 - 'A' + 0x0A;
 506     else
 507         i1 = digit1 - '0';
 508     if (digit2 >= 'a')
 509         i2 = digit2 - 'a' + 0x0A;
 510     else if (digit2 >= 'A')
 511         i2 = digit2 - 'A' + 0x0A;
 512     else
 513         i2 = digit2 - '0';
 514     return (0x10 * i1 + i2);
 515 }
 516
 517 static bool GetRGBFromName(const char *inname, bool *isNone,
 518                            unsigned char *r, unsigned char*g, unsigned char *b)
 519 {
 520     int left, right, middle;
 521     int cmp;
 522     wxUint32 rgbVal;
 523     char *name;
 524     char *grey, *p;
 525
 526     // Neither #rrggbb nor #rrrrggggbbbb are in database, we parse them directly
 527     size_t inname_len = strlen(inname);
 528     if ( *inname == '#' && (inname_len == 7 || inname_len == 13))
 529     {
 530         size_t ofs = (inname_len == 7) ? 2 : 4;
 531         *r = ParseHexadecimal(inname[1], inname[2]);
 532         *g = ParseHexadecimal(inname[1*ofs+1], inname[1*ofs+2]);
 533         *b = ParseHexadecimal(inname[2*ofs+1], inname[2*ofs+2]);
 534         *isNone = FALSE;
 535         return TRUE;
 536     }
 537
 538     name = strdup(inname);
 539
 540     // theRGBRecords[] has no names with spaces, and no grey, but a
 541     // lot of gray...
 542
 543     // so first extract ' '
 544     while ((p = strchr(name, ' ')) != NULL)
 545     {
 546         while (*(p))            // till eof of string
 547         {
 548             *p = *(p + 1);      // copy to the left
 549             p++;
 550         }
 551     }
 552     // fold to lower case
 553     p = name;
 554     while (*p)
 555     {
 556         *p = tolower(*p);
 557         p++;
 558     }
 559
 560     // substitute Grey with Gray, else rgbtab.h would have more than 100
 561     // 'duplicate' entries
 562     if ( (grey = strstr(name, "grey")) != NULL )
 563         grey[2] = 'a';
 564
 565     // check for special 'none' colour:
 566     bool found;
 567     if ( strcmp(name, "none") == 0 )
 568     {
 569         *isNone = TRUE;
 570         found = TRUE;
 571     }
 572     else // not "None"
 573     {
 574         found = FALSE;
 575
 576         // binary search:
 577         left = 0;
 578         right = numTheRGBRecords - 1;
 579         do
 580         {
 581             middle = (left + right) / 2;
 582             cmp = strcmp(name, theRGBRecords[middle].name);
 583             if ( cmp == 0 )
 584             {
 585                 rgbVal = theRGBRecords[middle].rgb;
 586                 *r = (unsigned char)((rgbVal >> 16) & 0xFF);
 587                 *g = (unsigned char)((rgbVal >> 8) & 0xFF);
 588                 *b = (unsigned char)((rgbVal) & 0xFF);
 589                 *isNone = FALSE;
 590                 found = TRUE;
 591                 break;
 592             }
 593             else if ( cmp < 0 )
 594             {
 595                 right = middle - 1;
 596             }
 597             else // cmp > 0
 598             {
 599                 left = middle + 1;
 600             }
 601         } while (left <= right);
 602     }
 603
 604     free(name);
 605
 606     return found;
 607 }
 608
 609 static const char *ParseColor(const char *data)
 610 {
 611     static const char *targets[] =
 612                         {"c ", "g ", "g4 ", "m ", "b ", "s ", NULL};
 613
 614     const char *p, *r;
 615     const char *q;
 616     int i;
 617
 618     for (i = 0; targets[i] != NULL; i++)
 619     {
 620         r = data;
 621         for (q = targets[i]; *r != '\0'; r++)
 622         {
 623             if ( *r != *q )
 624                 continue;
 625             if ( !isspace((int) (*(r - 1))) )
 626                 continue;
 627             p = r;
 628             for (;;)
 629             {
 630                 if ( *q == '\0' )
 631                     return p;
 632                 if ( *p++ != *q++ )
 633                     break;
 634             }
 635             q = targets[i];
 636         }
 637     }
 638     return NULL;
 639 }
 640
 641 class wxXPMColourMapData : public wxObject
 642 {
 643     public:
 644         unsigned char R,G,B;
 645 };
 646
 647 wxImage wxXPMDecoder::ReadData(const char **xpm_data)
 648 {
 649     wxImage img;
 650     int count;
 651     unsigned width, height, colors_cnt, chars_per_pixel;
 652     size_t i, j, i_key;
 653     wxChar key[64];
 654     const char *clr_def;
 655     bool hasMask;
 656     wxXPMColourMapData *clr_data;
 657     wxHashTable clr_tbl(wxKEY_STRING);
 658
 659     /*
 660      *  Read hints and initialize structures:
 661      */
 662
 663     count = sscanf(xpm_data[0], "%u %u %u %u",
 664                    &width, &height, &colors_cnt, &chars_per_pixel);
 665     if ( count != 4 || width * height * colors_cnt == 0 )
 666     {
 667         wxLogError(_T("XPM: Not XPM data!"));
 668         return wxNullImage;
 669     }
 670
 671     // VS: XPM color map this large would be insane, since XPMs are encoded with
 672     //     92 possible values on each position, 92^64 is *way* larger space than
 673     //     8bit RGB...
 674     wxCHECK_MSG(chars_per_pixel < 64, wxNullImage, wxT("XPM colormaps this large not supported."));
 675
 676     img.Create(width, height);
 677     if ( !img.Ok() ) return img;
 678
 679     img.SetMask(FALSE);
 680     key[chars_per_pixel] = wxT('\0');
 681     hasMask = FALSE;
 682     clr_tbl.DeleteContents(TRUE);
 683
 684     /*
 685      *  Create colour map:
 686      */
 687     for (i = 0; i < colors_cnt; i++)
 688     {
 689         for (i_key = 0; i_key < chars_per_pixel; i_key++)
 690             key[i_key] = (wxChar)xpm_data[1 + i][i_key];
 691         clr_def = ParseColor(xpm_data[1 + i]);
 692         clr_data = new wxXPMColourMapData;
 693
 694         if ( clr_def == NULL )
 695         {
 696             wxLogError(_("XPM: malformed colour definition '%s'!"), xpm_data[1+i]);
 697             clr_data->R = 255, clr_data->G = 0, clr_data->B = 255;
 698         }
 699         else
 700         {
 701             bool isNone;
 702             if ( !GetRGBFromName(clr_def, &isNone,
 703                                  &clr_data->R, &clr_data->G, &clr_data->B) )
 704             {
 705                 wxLogError(_("XPM: malformed colour definition '%s'!"), xpm_data[1+i]);
 706                 clr_data->R = 255, clr_data->G = 0, clr_data->B = 255;
 707             }
 708             else
 709             {
 710                 if ( isNone )
 711                 {
 712                     img.SetMask(TRUE);
 713                     img.SetMaskColour(255, 0, 255);
 714                     hasMask = TRUE;
 715                     clr_data->R = 255, clr_data->G = 0, clr_data->B = 255;
 716                 }
 717                 else
 718                 {
 719                     if ( hasMask && clr_data->R == 255 &&
 720                                     clr_data->G == 0 && clr_data->B == 255 )
 721                         clr_data->B = 254;
 722                 }
 723             }
 724         }
 725         clr_tbl.Put(key, clr_data);
 726     }
 727
 728     /*
 729      *  Parse image data:
 730      */
 731
 732     unsigned char *img_data = img.GetData();
 733     for (j = 0; j < height; j++)
 734     {
 735         for (i = 0; i < width; i++, img_data += 3)
 736         {
 737             for (i_key = 0; i_key < chars_per_pixel; i_key++)
 738                 key[i_key] = (wxChar)xpm_data[1 + colors_cnt + j]
 739                                              [chars_per_pixel * i + i_key];
 740             clr_data = (wxXPMColourMapData*) clr_tbl.Get(key);
 741             if ( clr_data == NULL )
 742             {
 743                 wxLogError(_("XPM: Malformed pixel data!"));
 744             }
 745             else
 746             {
 747                 img_data[0] = clr_data->R;
 748                 img_data[1] = clr_data->G;
 749                 img_data[2] = clr_data->B;
 750             }
 751         }
 752     }
 753
 754     return img;
 755 }
 756
 757 #endif // wxUSE_IMAGE && wxUSE_XPM