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