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 wxNullImage;
 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     if ( !lines_cnt )
 207     {
 208         // this doesn't really look an XPM image
 209         return wxNullImage;
 210     }
 211
 212     xpm_lines = new const char*[lines_cnt];
 213     xpm_lines[0] = xpm_buffer;
 214     line = 1;
 215     for (p = xpm_buffer; (*p != '\0') && (line < lines_cnt); p++)
 216     {
 217         if ( *p == '\n' )
 218         {
 219             xpm_lines[line] = p + 1;
 220             *p = '\0';
 221             line++;
 222         }
 223     }
 224
 225     /*
 226      *  Read the image:
 227      */
 228     wxImage img = ReadData(xpm_lines);
 229
 230     delete[] xpm_buffer;
 231 #ifdef __WIN16__
 232     delete[] (char**) xpm_lines;
 233 #else
 234     delete[] xpm_lines;
 235 #endif
 236     return img;
 237 }
 238 #endif // wxUSE_STREAMS
 239
 240
 241 /*****************************************************************************\
 242 * rgbtab.h                                                                    *
 243 *                                                                             *
 244 * A hard coded rgb.txt. To keep it short I removed all colornames with        *
 245 * trailing numbers, Blue3 etc, except the GrayXX. Sorry Grey-lovers I prefer  *
 246 * Gray ;-). But Grey is recognized on lookups, only on save Gray will be      *
 247 * used, maybe you want to do some substitue there too.                        *
 248 *                                                                             *
 249 * To save memory the RGBs are coded in one long value, as done by the RGB     *
 250 * macro.                                                                      *
 251 *                                                                             *
 252 * Developed by HeDu 3/94 (hedu@cul-ipn.uni-kiel.de)                           *
 253 \*****************************************************************************/
 254
 255
 256 typedef struct
 257 {
 258     char *name;
 259     wxUint32 rgb;
 260 } rgbRecord;
 261
 262 #define myRGB(r,g,b)   ((wxUint32)r<<16|(wxUint32)g<<8|(wxUint32)b)
 263
 264 static rgbRecord theRGBRecords[] =
 265 {
 266     {"aliceblue", myRGB(240, 248, 255)},
 267     {"antiquewhite", myRGB(250, 235, 215)},
 268     {"aquamarine", myRGB(50, 191, 193)},
 269     {"azure", myRGB(240, 255, 255)},
 270     {"beige", myRGB(245, 245, 220)},
 271     {"bisque", myRGB(255, 228, 196)},
 272     {"black", myRGB(0, 0, 0)},
 273     {"blanchedalmond", myRGB(255, 235, 205)},
 274     {"blue", myRGB(0, 0, 255)},
 275     {"blueviolet", myRGB(138, 43, 226)},
 276     {"brown", myRGB(165, 42, 42)},
 277     {"burlywood", myRGB(222, 184, 135)},
 278     {"cadetblue", myRGB(95, 146, 158)},
 279     {"chartreuse", myRGB(127, 255, 0)},
 280     {"chocolate", myRGB(210, 105, 30)},
 281     {"coral", myRGB(255, 114, 86)},
 282     {"cornflowerblue", myRGB(34, 34, 152)},
 283     {"cornsilk", myRGB(255, 248, 220)},
 284     {"cyan", myRGB(0, 255, 255)},
 285     {"darkgoldenrod", myRGB(184, 134, 11)},
 286     {"darkgreen", myRGB(0, 86, 45)},
 287     {"darkkhaki", myRGB(189, 183, 107)},
 288     {"darkolivegreen", myRGB(85, 86, 47)},
 289     {"darkorange", myRGB(255, 140, 0)},
 290     {"darkorchid", myRGB(139, 32, 139)},
 291     {"darksalmon", myRGB(233, 150, 122)},
 292     {"darkseagreen", myRGB(143, 188, 143)},
 293     {"darkslateblue", myRGB(56, 75, 102)},
 294     {"darkslategray", myRGB(47, 79, 79)},
 295     {"darkturquoise", myRGB(0, 166, 166)},
 296     {"darkviolet", myRGB(148, 0, 211)},
 297     {"deeppink", myRGB(255, 20, 147)},
 298     {"deepskyblue", myRGB(0, 191, 255)},
 299     {"dimgray", myRGB(84, 84, 84)},
 300     {"dodgerblue", myRGB(30, 144, 255)},
 301     {"firebrick", myRGB(142, 35, 35)},
 302     {"floralwhite", myRGB(255, 250, 240)},
 303     {"forestgreen", myRGB(80, 159, 105)},
 304     {"gainsboro", myRGB(220, 220, 220)},
 305     {"ghostwhite", myRGB(248, 248, 255)},
 306     {"gold", myRGB(218, 170, 0)},
 307     {"goldenrod", myRGB(239, 223, 132)},
 308     {"gray", myRGB(126, 126, 126)},
 309     {"gray0", myRGB(0, 0, 0)},
 310     {"gray1", myRGB(3, 3, 3)},
 311     {"gray10", myRGB(26, 26, 26)},
 312     {"gray100", myRGB(255, 255, 255)},
 313     {"gray11", myRGB(28, 28, 28)},
 314     {"gray12", myRGB(31, 31, 31)},
 315     {"gray13", myRGB(33, 33, 33)},
 316     {"gray14", myRGB(36, 36, 36)},
 317     {"gray15", myRGB(38, 38, 38)},
 318     {"gray16", myRGB(41, 41, 41)},
 319     {"gray17", myRGB(43, 43, 43)},
 320     {"gray18", myRGB(46, 46, 46)},
 321     {"gray19", myRGB(48, 48, 48)},
 322     {"gray2", myRGB(5, 5, 5)},
 323     {"gray20", myRGB(51, 51, 51)},
 324     {"gray21", myRGB(54, 54, 54)},
 325     {"gray22", myRGB(56, 56, 56)},
 326     {"gray23", myRGB(59, 59, 59)},
 327     {"gray24", myRGB(61, 61, 61)},
 328     {"gray25", myRGB(64, 64, 64)},
 329     {"gray26", myRGB(66, 66, 66)},
 330     {"gray27", myRGB(69, 69, 69)},
 331     {"gray28", myRGB(71, 71, 71)},
 332     {"gray29", myRGB(74, 74, 74)},
 333     {"gray3", myRGB(8, 8, 8)},
 334     {"gray30", myRGB(77, 77, 77)},
 335     {"gray31", myRGB(79, 79, 79)},
 336     {"gray32", myRGB(82, 82, 82)},
 337     {"gray33", myRGB(84, 84, 84)},
 338     {"gray34", myRGB(87, 87, 87)},
 339     {"gray35", myRGB(89, 89, 89)},
 340     {"gray36", myRGB(92, 92, 92)},
 341     {"gray37", myRGB(94, 94, 94)},
 342     {"gray38", myRGB(97, 97, 97)},
 343     {"gray39", myRGB(99, 99, 99)},
 344     {"gray4", myRGB(10, 10, 10)},
 345     {"gray40", myRGB(102, 102, 102)},
 346     {"gray41", myRGB(105, 105, 105)},
 347     {"gray42", myRGB(107, 107, 107)},
 348     {"gray43", myRGB(110, 110, 110)},
 349     {"gray44", myRGB(112, 112, 112)},
 350     {"gray45", myRGB(115, 115, 115)},
 351     {"gray46", myRGB(117, 117, 117)},
 352     {"gray47", myRGB(120, 120, 120)},
 353     {"gray48", myRGB(122, 122, 122)},
 354     {"gray49", myRGB(125, 125, 125)},
 355     {"gray5", myRGB(13, 13, 13)},
 356     {"gray50", myRGB(127, 127, 127)},
 357     {"gray51", myRGB(130, 130, 130)},
 358     {"gray52", myRGB(133, 133, 133)},
 359     {"gray53", myRGB(135, 135, 135)},
 360     {"gray54", myRGB(138, 138, 138)},
 361     {"gray55", myRGB(140, 140, 140)},
 362     {"gray56", myRGB(143, 143, 143)},
 363     {"gray57", myRGB(145, 145, 145)},
 364     {"gray58", myRGB(148, 148, 148)},
 365     {"gray59", myRGB(150, 150, 150)},
 366     {"gray6", myRGB(15, 15, 15)},
 367     {"gray60", myRGB(153, 153, 153)},
 368     {"gray61", myRGB(156, 156, 156)},
 369     {"gray62", myRGB(158, 158, 158)},
 370     {"gray63", myRGB(161, 161, 161)},
 371     {"gray64", myRGB(163, 163, 163)},
 372     {"gray65", myRGB(166, 166, 166)},
 373     {"gray66", myRGB(168, 168, 168)},
 374     {"gray67", myRGB(171, 171, 171)},
 375     {"gray68", myRGB(173, 173, 173)},
 376     {"gray69", myRGB(176, 176, 176)},
 377     {"gray7", myRGB(18, 18, 18)},
 378     {"gray70", myRGB(179, 179, 179)},
 379     {"gray71", myRGB(181, 181, 181)},
 380     {"gray72", myRGB(184, 184, 184)},
 381     {"gray73", myRGB(186, 186, 186)},
 382     {"gray74", myRGB(189, 189, 189)},
 383     {"gray75", myRGB(191, 191, 191)},
 384     {"gray76", myRGB(194, 194, 194)},
 385     {"gray77", myRGB(196, 196, 196)},
 386     {"gray78", myRGB(199, 199, 199)},
 387     {"gray79", myRGB(201, 201, 201)},
 388     {"gray8", myRGB(20, 20, 20)},
 389     {"gray80", myRGB(204, 204, 204)},
 390     {"gray81", myRGB(207, 207, 207)},
 391     {"gray82", myRGB(209, 209, 209)},
 392     {"gray83", myRGB(212, 212, 212)},
 393     {"gray84", myRGB(214, 214, 214)},
 394     {"gray85", myRGB(217, 217, 217)},
 395     {"gray86", myRGB(219, 219, 219)},
 396     {"gray87", myRGB(222, 222, 222)},
 397     {"gray88", myRGB(224, 224, 224)},
 398     {"gray89", myRGB(227, 227, 227)},
 399     {"gray9", myRGB(23, 23, 23)},
 400     {"gray90", myRGB(229, 229, 229)},
 401     {"gray91", myRGB(232, 232, 232)},
 402     {"gray92", myRGB(235, 235, 235)},
 403     {"gray93", myRGB(237, 237, 237)},
 404     {"gray94", myRGB(240, 240, 240)},
 405     {"gray95", myRGB(242, 242, 242)},
 406     {"gray96", myRGB(245, 245, 245)},
 407     {"gray97", myRGB(247, 247, 247)},
 408     {"gray98", myRGB(250, 250, 250)},
 409     {"gray99", myRGB(252, 252, 252)},
 410     {"green", myRGB(0, 255, 0)},
 411     {"greenyellow", myRGB(173, 255, 47)},
 412     {"honeydew", myRGB(240, 255, 240)},
 413     {"hotpink", myRGB(255, 105, 180)},
 414     {"indianred", myRGB(107, 57, 57)},
 415     {"ivory", myRGB(255, 255, 240)},
 416     {"khaki", myRGB(179, 179, 126)},
 417     {"lavender", myRGB(230, 230, 250)},
 418     {"lavenderblush", myRGB(255, 240, 245)},
 419     {"lawngreen", myRGB(124, 252, 0)},
 420     {"lemonchiffon", myRGB(255, 250, 205)},
 421     {"lightblue", myRGB(176, 226, 255)},
 422     {"lightcoral", myRGB(240, 128, 128)},
 423     {"lightcyan", myRGB(224, 255, 255)},
 424     {"lightgoldenrod", myRGB(238, 221, 130)},
 425     {"lightgoldenrodyellow", myRGB(250, 250, 210)},
 426     {"lightgray", myRGB(168, 168, 168)},
 427     {"lightpink", myRGB(255, 182, 193)},
 428     {"lightsalmon", myRGB(255, 160, 122)},
 429     {"lightseagreen", myRGB(32, 178, 170)},
 430     {"lightskyblue", myRGB(135, 206, 250)},
 431     {"lightslateblue", myRGB(132, 112, 255)},
 432     {"lightslategray", myRGB(119, 136, 153)},
 433     {"lightsteelblue", myRGB(124, 152, 211)},
 434     {"lightyellow", myRGB(255, 255, 224)},
 435     {"limegreen", myRGB(0, 175, 20)},
 436     {"linen", myRGB(250, 240, 230)},
 437     {"magenta", myRGB(255, 0, 255)},
 438     {"maroon", myRGB(143, 0, 82)},
 439     {"mediumaquamarine", myRGB(0, 147, 143)},
 440     {"mediumblue", myRGB(50, 50, 204)},
 441     {"mediumforestgreen", myRGB(50, 129, 75)},
 442     {"mediumgoldenrod", myRGB(209, 193, 102)},
 443     {"mediumorchid", myRGB(189, 82, 189)},
 444     {"mediumpurple", myRGB(147, 112, 219)},
 445     {"mediumseagreen", myRGB(52, 119, 102)},
 446     {"mediumslateblue", myRGB(106, 106, 141)},
 447     {"mediumspringgreen", myRGB(35, 142, 35)},
 448     {"mediumturquoise", myRGB(0, 210, 210)},
 449     {"mediumvioletred", myRGB(213, 32, 121)},
 450     {"midnightblue", myRGB(47, 47, 100)},
 451     {"mintcream", myRGB(245, 255, 250)},
 452     {"mistyrose", myRGB(255, 228, 225)},
 453     {"moccasin", myRGB(255, 228, 181)},
 454     {"navajowhite", myRGB(255, 222, 173)},
 455     {"navy", myRGB(35, 35, 117)},
 456     {"navyblue", myRGB(35, 35, 117)},
 457     {"oldlace", myRGB(253, 245, 230)},
 458     {"olivedrab", myRGB(107, 142, 35)},
 459     {"orange", myRGB(255, 135, 0)},
 460     {"orangered", myRGB(255, 69, 0)},
 461     {"orchid", myRGB(239, 132, 239)},
 462     {"palegoldenrod", myRGB(238, 232, 170)},
 463     {"palegreen", myRGB(115, 222, 120)},
 464     {"paleturquoise", myRGB(175, 238, 238)},
 465     {"palevioletred", myRGB(219, 112, 147)},
 466     {"papayawhip", myRGB(255, 239, 213)},
 467     {"peachpuff", myRGB(255, 218, 185)},
 468     {"peru", myRGB(205, 133, 63)},
 469     {"pink", myRGB(255, 181, 197)},
 470     {"plum", myRGB(197, 72, 155)},
 471     {"powderblue", myRGB(176, 224, 230)},
 472     {"purple", myRGB(160, 32, 240)},
 473     {"red", myRGB(255, 0, 0)},
 474     {"rosybrown", myRGB(188, 143, 143)},
 475     {"royalblue", myRGB(65, 105, 225)},
 476     {"saddlebrown", myRGB(139, 69, 19)},
 477     {"salmon", myRGB(233, 150, 122)},
 478     {"sandybrown", myRGB(244, 164, 96)},
 479     {"seagreen", myRGB(82, 149, 132)},
 480     {"seashell", myRGB(255, 245, 238)},
 481     {"sienna", myRGB(150, 82, 45)},
 482     {"skyblue", myRGB(114, 159, 255)},
 483     {"slateblue", myRGB(126, 136, 171)},
 484     {"slategray", myRGB(112, 128, 144)},
 485     {"snow", myRGB(255, 250, 250)},
 486     {"springgreen", myRGB(65, 172, 65)},
 487     {"steelblue", myRGB(84, 112, 170)},
 488     {"tan", myRGB(222, 184, 135)},
 489     {"thistle", myRGB(216, 191, 216)},
 490     {"tomato", myRGB(255, 99, 71)},
 491     {"transparent", myRGB(0, 0, 1)},
 492     {"turquoise", myRGB(25, 204, 223)},
 493     {"violet", myRGB(156, 62, 206)},
 494     {"violetred", myRGB(243, 62, 150)},
 495     {"wheat", myRGB(245, 222, 179)},
 496     {"white", myRGB(255, 255, 255)},
 497     {"whitesmoke", myRGB(245, 245, 245)},
 498     {"yellow", myRGB(255, 255, 0)},
 499     {"yellowgreen", myRGB(50, 216, 56)},
 500     {NULL, myRGB(0, 0, 0)}
 501 };
 502 static int numTheRGBRecords = 234;
 503
 504 static unsigned char ParseHexadecimal(char digit1, char digit2)
 505 {
 506     unsigned char i1, i2;
 507
 508     if (digit1 >= 'a')
 509         i1 = digit1 - 'a' + 0x0A;
 510     else if (digit1 >= 'A')
 511         i1 = digit1 - 'A' + 0x0A;
 512     else
 513         i1 = digit1 - '0';
 514     if (digit2 >= 'a')
 515         i2 = digit2 - 'a' + 0x0A;
 516     else if (digit2 >= 'A')
 517         i2 = digit2 - 'A' + 0x0A;
 518     else
 519         i2 = digit2 - '0';
 520     return (0x10 * i1 + i2);
 521 }
 522
 523 static bool GetRGBFromName(const char *inname, bool *isNone,
 524                            unsigned char *r, unsigned char*g, unsigned char *b)
 525 {
 526     int left, right, middle;
 527     int cmp;
 528     wxUint32 rgbVal;
 529     char *name;
 530     char *grey, *p;
 531
 532     // Neither #rrggbb nor #rrrrggggbbbb are in database, we parse them directly
 533     size_t inname_len = strlen(inname);
 534     if ( *inname == '#' && (inname_len == 7 || inname_len == 13))
 535     {
 536         size_t ofs = (inname_len == 7) ? 2 : 4;
 537         *r = ParseHexadecimal(inname[1], inname[2]);
 538         *g = ParseHexadecimal(inname[1*ofs+1], inname[1*ofs+2]);
 539         *b = ParseHexadecimal(inname[2*ofs+1], inname[2*ofs+2]);
 540         *isNone = FALSE;
 541         return TRUE;
 542     }
 543
 544     name = strdup(inname);
 545
 546     // theRGBRecords[] has no names with spaces, and no grey, but a
 547     // lot of gray...
 548
 549     // so first extract ' '
 550     while ((p = strchr(name, ' ')) != NULL)
 551     {
 552         while (*(p))            // till eof of string
 553         {
 554             *p = *(p + 1);      // copy to the left
 555             p++;
 556         }
 557     }
 558     // fold to lower case
 559     p = name;
 560     while (*p)
 561     {
 562         *p = tolower(*p);
 563         p++;
 564     }
 565
 566     // substitute Grey with Gray, else rgbtab.h would have more than 100
 567     // 'duplicate' entries
 568     if ( (grey = strstr(name, "grey")) != NULL )
 569         grey[2] = 'a';
 570
 571     // check for special 'none' colour:
 572     bool found;
 573     if ( strcmp(name, "none") == 0 )
 574     {
 575         *isNone = TRUE;
 576         found = TRUE;
 577     }
 578     else // not "None"
 579     {
 580         found = FALSE;
 581
 582         // binary search:
 583         left = 0;
 584         right = numTheRGBRecords - 1;
 585         do
 586         {
 587             middle = (left + right) / 2;
 588             cmp = strcmp(name, theRGBRecords[middle].name);
 589             if ( cmp == 0 )
 590             {
 591                 rgbVal = theRGBRecords[middle].rgb;
 592                 *r = (unsigned char)((rgbVal >> 16) & 0xFF);
 593                 *g = (unsigned char)((rgbVal >> 8) & 0xFF);
 594                 *b = (unsigned char)((rgbVal) & 0xFF);
 595                 *isNone = FALSE;
 596                 found = TRUE;
 597                 break;
 598             }
 599             else if ( cmp < 0 )
 600             {
 601                 right = middle - 1;
 602             }
 603             else // cmp > 0
 604             {
 605                 left = middle + 1;
 606             }
 607         } while (left <= right);
 608     }
 609
 610     free(name);
 611
 612     return found;
 613 }
 614
 615 static const char *ParseColor(const char *data)
 616 {
 617     static const char *targets[] =
 618                         {"c ", "g ", "g4 ", "m ", "b ", "s ", NULL};
 619
 620     const char *p, *r;
 621     const char *q;
 622     int i;
 623
 624     for (i = 0; targets[i] != NULL; i++)
 625     {
 626         r = data;
 627         for (q = targets[i]; *r != '\0'; r++)
 628         {
 629             if ( *r != *q )
 630                 continue;
 631             if ( !isspace((int) (*(r - 1))) )
 632                 continue;
 633             p = r;
 634             for (;;)
 635             {
 636                 if ( *q == '\0' )
 637                     return p;
 638                 if ( *p++ != *q++ )
 639                     break;
 640             }
 641             q = targets[i];
 642         }
 643     }
 644     return NULL;
 645 }
 646
 647 class wxXPMColourMapData : public wxObject
 648 {
 649     public:
 650         unsigned char R,G,B;
 651 };
 652
 653 wxImage wxXPMDecoder::ReadData(const char **xpm_data)
 654 {
 655     wxImage img;
 656     int count;
 657     unsigned width, height, colors_cnt, chars_per_pixel;
 658     size_t i, j, i_key;
 659     wxChar key[64];
 660     const char *clr_def;
 661     bool hasMask;
 662     wxXPMColourMapData *clr_data;
 663     wxHashTable clr_tbl(wxKEY_STRING);
 664
 665     /*
 666      *  Read hints and initialize structures:
 667      */
 668
 669     count = sscanf(xpm_data[0], "%u %u %u %u",
 670                    &width, &height, &colors_cnt, &chars_per_pixel);
 671     if ( count != 4 || width * height * colors_cnt == 0 )
 672     {
 673         wxLogError(_T("XPM: Not XPM data!"));
 674         return wxNullImage;
 675     }
 676
 677     // VS: XPM color map this large would be insane, since XPMs are encoded with
 678     //     92 possible values on each position, 92^64 is *way* larger space than
 679     //     8bit RGB...
 680     wxCHECK_MSG(chars_per_pixel < 64, wxNullImage, wxT("XPM colormaps this large not supported."));
 681
 682     img.Create(width, height);
 683     if ( !img.Ok() ) return img;
 684
 685     img.SetMask(FALSE);
 686     key[chars_per_pixel] = wxT('\0');
 687     hasMask = FALSE;
 688     clr_tbl.DeleteContents(TRUE);
 689
 690     /*
 691      *  Create colour map:
 692      */
 693     for (i = 0; i < colors_cnt; i++)
 694     {
 695         for (i_key = 0; i_key < chars_per_pixel; i_key++)
 696             key[i_key] = (wxChar)xpm_data[1 + i][i_key];
 697         clr_def = ParseColor(xpm_data[1 + i]);
 698         clr_data = new wxXPMColourMapData;
 699
 700         if ( clr_def == NULL )
 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             bool isNone;
 708             if ( !GetRGBFromName(clr_def, &isNone,
 709                                  &clr_data->R, &clr_data->G, &clr_data->B) )
 710             {
 711                 wxLogError(_("XPM: malformed colour definition '%s'!"), xpm_data[1+i]);
 712                 clr_data->R = 255, clr_data->G = 0, clr_data->B = 255;
 713             }
 714             else
 715             {
 716                 if ( isNone )
 717                 {
 718                     img.SetMask(TRUE);
 719                     img.SetMaskColour(255, 0, 255);
 720                     hasMask = TRUE;
 721                     clr_data->R = 255, clr_data->G = 0, clr_data->B = 255;
 722                 }
 723                 else
 724                 {
 725                     if ( hasMask && clr_data->R == 255 &&
 726                                     clr_data->G == 0 && clr_data->B == 255 )
 727                         clr_data->B = 254;
 728                 }
 729             }
 730         }
 731         clr_tbl.Put(key, clr_data);
 732     }
 733
 734     /*
 735      *  Parse image data:
 736      */
 737
 738     unsigned char *img_data = img.GetData();
 739     for (j = 0; j < height; j++)
 740     {
 741         for (i = 0; i < width; i++, img_data += 3)
 742         {
 743             for (i_key = 0; i_key < chars_per_pixel; i_key++)
 744                 key[i_key] = (wxChar)xpm_data[1 + colors_cnt + j]
 745                                              [chars_per_pixel * i + i_key];
 746             clr_data = (wxXPMColourMapData*) clr_tbl.Get(key);
 747             if ( clr_data == NULL )
 748             {
 749                 wxLogError(_("XPM: Malformed pixel data!"));
 750             }
 751             else
 752             {
 753                 img_data[0] = clr_data->R;
 754                 img_data[1] = clr_data->G;
 755                 img_data[2] = clr_data->B;
 756             }
 757         }
 758     }
 759
 760     return img;
 761 }
 762
 763 #endif // wxUSE_IMAGE && wxUSE_XPM