src/common/xpmdecod.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/common/xpmdecod.cpp
   3 // Purpose:     wxXPMDecoder
   4 // Author:      John Cristy, Vaclav Slavik
   5 // RCS-ID:      $Id$
   6 // Copyright:   (c) John Cristy, Vaclav Slavik
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 /*
  11
  12 This file is partially based on source code of ImageMagick by John Cristy. Its
  13 license is as follows:
  14
  15 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  16 %                                                                             %
  17 %                                                                             %
  18 %                                                                             %
  19 %                            X   X  PPPP   M   M                              %
  20 %                             X X   P   P  MM MM                              %
  21 %                              X    PPPP   M M M                              %
  22 %                             X X   P      M   M                              %
  23 %                            X   X  P      M   M                              %
  24 %                                                                             %
  25 %                                                                             %
  26 %                    Read/Write ImageMagick Image Format.                     %
  27 %                                                                             %
  28 %                                                                             %
  29 %                              Software Design                                %
  30 %                                John Cristy                                  %
  31 %                                 July 1992                                   %
  32 %                                                                             %
  33 %                                                                             %
  34 %  Copyright (C) 2001 ImageMagick Studio, a non-profit organization dedicated %
  35 %  to making software imaging solutions freely available.                     %
  36 %                                                                             %
  37 %  Permission is hereby granted, free of charge, to any person obtaining a    %
  38 %  copy of this software and associated documentation files ("ImageMagick"),  %
  39 %  to deal in ImageMagick without restriction, including without limitation   %
  40 %  the rights to use, copy, modify, merge, publish, distribute, sublicense,   %
  41 %  and/or sell copies of ImageMagick, and to permit persons to whom the       %
  42 %  ImageMagick is furnished to do so, subject to the following conditions:    %
  43 %                                                                             %
  44 %  The above copyright notice and this permission notice shall be included in %
  45 %  all copies or substantial portions of ImageMagick.                         %
  46 %                                                                             %
  47 %  The software is provided "as is", without warranty of any kind, express or %
  48 %  implied, including but not limited to the warranties of merchantability,   %
  49 %  fitness for a particular purpose and noninfringement.  In no event shall   %
  50 %  ImageMagick Studio be liable for any claim, damages or other liability,    %
  51 %  whether in an action of contract, tort or otherwise, arising from, out of  %
  52 %  or in connection with ImageMagick or the use or other dealings in          %
  53 %  ImageMagick.                                                               %
  54 %                                                                             %
  55 %  Except as contained in this notice, the name of the ImageMagick Studio     %
  56 %  shall not be used in advertising or otherwise to promote the sale, use or  %
  57 %  other dealings in ImageMagick without prior written authorization from the %
  58 %  ImageMagick Studio.                                                        %
  59 %                                                                             %
  60 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  61 %
  62 %
  63 */
  64
  65 /*
  66  * Also contains some pieces from libxpm and its modification for win32 by
  67  * HeDu <hedu@cul-ipn.uni-kiel.de>:
  68  *
  69  * Copyright (C) 1989-95 GROUPE BULL
  70  *
  71  * Permission is hereby granted, free of charge, to any person obtaining a copy
  72  * of this software and associated documentation files (the "Software"), to
  73  * deal in the Software without restriction, including without limitation the
  74  * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
  75  * sell copies of the Software, and to permit persons to whom the Software is
  76  * furnished to do so, subject to the following conditions:
  77  *
  78  * The above copyright notice and this permission notice shall be included in
  79  * all copies or substantial portions of the Software.
  80  *
  81  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  82  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  83  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  84  * GROUPE BULL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  85  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  86  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  87  *
  88  * Except as contained in this notice, the name of GROUPE BULL shall not be
  89  * used in advertising or otherwise to promote the sale, use or other dealings
  90  * in this Software without prior written authorization from GROUPE BULL.
  91  */
  92
  93 // For compilers that support precompilation, includes "wx.h".
  94 #include "wx/wxprec.h"
  95
  96 #ifdef __BORLANDC__
  97     #pragma hdrstop
  98 #endif
  99
 100 #if wxUSE_IMAGE && wxUSE_XPM
 101
 102 #include "wx/xpmdecod.h"
 103
 104 #ifndef WX_PRECOMP
 105     #include "wx/intl.h"
 106     #include "wx/log.h"
 107     #include "wx/utils.h"
 108     #include "wx/hashmap.h"
 109     #include "wx/stream.h"
 110     #include "wx/image.h"
 111     #include "wx/palette.h"
 112 #endif
 113
 114 #include <string.h>
 115 #include <ctype.h>
 116
 117 #if wxUSE_STREAMS
 118 bool wxXPMDecoder::CanRead(wxInputStream& stream)
 119 {
 120     unsigned char buf[9];
 121
 122     if ( !stream.Read(buf, WXSIZEOF(buf)) )
 123         return false;
 124
 125     return memcmp(buf, "/* XPM */", WXSIZEOF(buf)) == 0;
 126 }
 127
 128 wxImage wxXPMDecoder::ReadFile(wxInputStream& stream)
 129 {
 130     size_t length = stream.GetSize();
 131     wxCHECK_MSG( length != 0, wxNullImage,
 132                  wxT("Cannot read XPM from stream of unknown size") );
 133
 134     // use a smart buffer to be sure to free memory even when we return on
 135     // error
 136     wxCharBuffer buffer(length);
 137
 138     char *xpm_buffer = (char *)buffer.data();
 139     if ( stream.Read(xpm_buffer, length).GetLastError() == wxSTREAM_READ_ERROR )
 140         return wxNullImage;
 141     xpm_buffer[length] = '\0';
 142
 143     /*
 144      *  Remove comments from the file:
 145      */
 146     char *p, *q;
 147     for (p = xpm_buffer; *p != '\0'; p++)
 148     {
 149         if ( (*p == '"') || (*p == '\'') )
 150         {
 151             if (*p == '"')
 152             {
 153               for (p++; *p != '\0'; p++)
 154                 if ( (*p == '"') && (*(p - 1) != '\\') )
 155                     break;
 156             }
 157             else // *p == '\''
 158             {
 159                 for (p++; *p != '\0'; p++)
 160                     if ( (*p == '\'') && (*(p - 1) != '\\') )
 161                         break;
 162             }
 163             if (*p == '\0')
 164                 break;
 165             continue;
 166         }
 167         if ( (*p != '/') || (*(p + 1) != '*') )
 168             continue;
 169         for (q = p + 2; *q != '\0'; q++)
 170         {
 171             if ( (*q == '*') && (*(q + 1) == '/') )
 172                 break;
 173         }
 174
 175         // memmove allows overlaps (unlike strcpy):
 176         size_t cpylen = strlen(q + 2) + 1;
 177         memmove(p, q + 2, cpylen);
 178     }
 179
 180     /*
 181      *  Remove unquoted characters:
 182      */
 183     size_t i = 0;
 184     for (p = xpm_buffer; *p != '\0'; p++)
 185     {
 186         if ( *p != '"' )
 187             continue;
 188         for (q = p + 1; *q != '\0'; q++)
 189             if (*q == '"')
 190                 break;
 191         strncpy(xpm_buffer + i, p + 1, q - p - 1);
 192         i += q - p - 1;
 193         xpm_buffer[i++] = '\n';
 194         p = q + 1;
 195     }
 196     xpm_buffer[i] = '\0';
 197
 198     /*
 199      *  Create array of lines and convert \n's to \0's:
 200      */
 201     const char **xpm_lines;
 202     size_t lines_cnt = 0;
 203     size_t line;
 204
 205     for (p = xpm_buffer; *p != '\0'; p++)
 206     {
 207         if ( *p == '\n' )
 208             lines_cnt++;
 209     }
 210
 211     if ( !lines_cnt )
 212     {
 213         // this doesn't really look an XPM image
 214         return wxNullImage;
 215     }
 216
 217     xpm_lines = new const char*[lines_cnt + 1];
 218     xpm_lines[0] = xpm_buffer;
 219     line = 1;
 220     for (p = xpm_buffer; (*p != '\0') && (line < lines_cnt); p++)
 221     {
 222         if ( *p == '\n' )
 223         {
 224             xpm_lines[line] = p + 1;
 225             *p = '\0';
 226             line++;
 227         }
 228     }
 229
 230     xpm_lines[lines_cnt] = NULL;
 231
 232     /*
 233      *  Read the image:
 234      */
 235     wxImage img = ReadData(xpm_lines);
 236
 237     delete[] xpm_lines;
 238
 239     return img;
 240 }
 241 #endif // wxUSE_STREAMS
 242
 243
 244 /*****************************************************************************\
 245 * rgbtab.h                                                                    *
 246 *                                                                             *
 247 * A hard coded rgb.txt. To keep it short I removed all colornames with        *
 248 * trailing numbers, Blue3 etc, except the GrayXX. Sorry Grey-lovers I prefer  *
 249 * Gray ;-). But Grey is recognized on lookups, only on save Gray will be      *
 250 * used, maybe you want to do some substitue there too.                        *
 251 *                                                                             *
 252 * To save memory the RGBs are coded in one long value, as done by the RGB     *
 253 * macro.                                                                      *
 254 *                                                                             *
 255 * Developed by HeDu 3/94 (hedu@cul-ipn.uni-kiel.de)                           *
 256 \*****************************************************************************/
 257
 258
 259 typedef struct
 260 {
 261     const char *name;
 262     wxUint32 rgb;
 263 } rgbRecord;
 264
 265 #define myRGB(r,g,b)   ((wxUint32)r<<16|(wxUint32)g<<8|(wxUint32)b)
 266
 267 static const rgbRecord theRGBRecords[] =
 268 {
 269     {"aliceblue", myRGB(240, 248, 255)},
 270     {"antiquewhite", myRGB(250, 235, 215)},
 271     {"aquamarine", myRGB(50, 191, 193)},
 272     {"azure", myRGB(240, 255, 255)},
 273     {"beige", myRGB(245, 245, 220)},
 274     {"bisque", myRGB(255, 228, 196)},
 275     {"black", myRGB(0, 0, 0)},
 276     {"blanchedalmond", myRGB(255, 235, 205)},
 277     {"blue", myRGB(0, 0, 255)},
 278     {"blueviolet", myRGB(138, 43, 226)},
 279     {"brown", myRGB(165, 42, 42)},
 280     {"burlywood", myRGB(222, 184, 135)},
 281     {"cadetblue", myRGB(95, 146, 158)},
 282     {"chartreuse", myRGB(127, 255, 0)},
 283     {"chocolate", myRGB(210, 105, 30)},
 284     {"coral", myRGB(255, 114, 86)},
 285     {"cornflowerblue", myRGB(34, 34, 152)},
 286     {"cornsilk", myRGB(255, 248, 220)},
 287     {"cyan", myRGB(0, 255, 255)},
 288     {"darkgoldenrod", myRGB(184, 134, 11)},
 289     {"darkgreen", myRGB(0, 86, 45)},
 290     {"darkkhaki", myRGB(189, 183, 107)},
 291     {"darkolivegreen", myRGB(85, 86, 47)},
 292     {"darkorange", myRGB(255, 140, 0)},
 293     {"darkorchid", myRGB(139, 32, 139)},
 294     {"darksalmon", myRGB(233, 150, 122)},
 295     {"darkseagreen", myRGB(143, 188, 143)},
 296     {"darkslateblue", myRGB(56, 75, 102)},
 297     {"darkslategray", myRGB(47, 79, 79)},
 298     {"darkturquoise", myRGB(0, 166, 166)},
 299     {"darkviolet", myRGB(148, 0, 211)},
 300     {"deeppink", myRGB(255, 20, 147)},
 301     {"deepskyblue", myRGB(0, 191, 255)},
 302     {"dimgray", myRGB(84, 84, 84)},
 303     {"dodgerblue", myRGB(30, 144, 255)},
 304     {"firebrick", myRGB(142, 35, 35)},
 305     {"floralwhite", myRGB(255, 250, 240)},
 306     {"forestgreen", myRGB(80, 159, 105)},
 307     {"gainsboro", myRGB(220, 220, 220)},
 308     {"ghostwhite", myRGB(248, 248, 255)},
 309     {"gold", myRGB(218, 170, 0)},
 310     {"goldenrod", myRGB(239, 223, 132)},
 311     {"gray", myRGB(126, 126, 126)},
 312     {"gray0", myRGB(0, 0, 0)},
 313     {"gray1", myRGB(3, 3, 3)},
 314     {"gray10", myRGB(26, 26, 26)},
 315     {"gray100", myRGB(255, 255, 255)},
 316     {"gray11", myRGB(28, 28, 28)},
 317     {"gray12", myRGB(31, 31, 31)},
 318     {"gray13", myRGB(33, 33, 33)},
 319     {"gray14", myRGB(36, 36, 36)},
 320     {"gray15", myRGB(38, 38, 38)},
 321     {"gray16", myRGB(41, 41, 41)},
 322     {"gray17", myRGB(43, 43, 43)},
 323     {"gray18", myRGB(46, 46, 46)},
 324     {"gray19", myRGB(48, 48, 48)},
 325     {"gray2", myRGB(5, 5, 5)},
 326     {"gray20", myRGB(51, 51, 51)},
 327     {"gray21", myRGB(54, 54, 54)},
 328     {"gray22", myRGB(56, 56, 56)},
 329     {"gray23", myRGB(59, 59, 59)},
 330     {"gray24", myRGB(61, 61, 61)},
 331     {"gray25", myRGB(64, 64, 64)},
 332     {"gray26", myRGB(66, 66, 66)},
 333     {"gray27", myRGB(69, 69, 69)},
 334     {"gray28", myRGB(71, 71, 71)},
 335     {"gray29", myRGB(74, 74, 74)},
 336     {"gray3", myRGB(8, 8, 8)},
 337     {"gray30", myRGB(77, 77, 77)},
 338     {"gray31", myRGB(79, 79, 79)},
 339     {"gray32", myRGB(82, 82, 82)},
 340     {"gray33", myRGB(84, 84, 84)},
 341     {"gray34", myRGB(87, 87, 87)},
 342     {"gray35", myRGB(89, 89, 89)},
 343     {"gray36", myRGB(92, 92, 92)},
 344     {"gray37", myRGB(94, 94, 94)},
 345     {"gray38", myRGB(97, 97, 97)},
 346     {"gray39", myRGB(99, 99, 99)},
 347     {"gray4", myRGB(10, 10, 10)},
 348     {"gray40", myRGB(102, 102, 102)},
 349     {"gray41", myRGB(105, 105, 105)},
 350     {"gray42", myRGB(107, 107, 107)},
 351     {"gray43", myRGB(110, 110, 110)},
 352     {"gray44", myRGB(112, 112, 112)},
 353     {"gray45", myRGB(115, 115, 115)},
 354     {"gray46", myRGB(117, 117, 117)},
 355     {"gray47", myRGB(120, 120, 120)},
 356     {"gray48", myRGB(122, 122, 122)},
 357     {"gray49", myRGB(125, 125, 125)},
 358     {"gray5", myRGB(13, 13, 13)},
 359     {"gray50", myRGB(127, 127, 127)},
 360     {"gray51", myRGB(130, 130, 130)},
 361     {"gray52", myRGB(133, 133, 133)},
 362     {"gray53", myRGB(135, 135, 135)},
 363     {"gray54", myRGB(138, 138, 138)},
 364     {"gray55", myRGB(140, 140, 140)},
 365     {"gray56", myRGB(143, 143, 143)},
 366     {"gray57", myRGB(145, 145, 145)},
 367     {"gray58", myRGB(148, 148, 148)},
 368     {"gray59", myRGB(150, 150, 150)},
 369     {"gray6", myRGB(15, 15, 15)},
 370     {"gray60", myRGB(153, 153, 153)},
 371     {"gray61", myRGB(156, 156, 156)},
 372     {"gray62", myRGB(158, 158, 158)},
 373     {"gray63", myRGB(161, 161, 161)},
 374     {"gray64", myRGB(163, 163, 163)},
 375     {"gray65", myRGB(166, 166, 166)},
 376     {"gray66", myRGB(168, 168, 168)},
 377     {"gray67", myRGB(171, 171, 171)},
 378     {"gray68", myRGB(173, 173, 173)},
 379     {"gray69", myRGB(176, 176, 176)},
 380     {"gray7", myRGB(18, 18, 18)},
 381     {"gray70", myRGB(179, 179, 179)},
 382     {"gray71", myRGB(181, 181, 181)},
 383     {"gray72", myRGB(184, 184, 184)},
 384     {"gray73", myRGB(186, 186, 186)},
 385     {"gray74", myRGB(189, 189, 189)},
 386     {"gray75", myRGB(191, 191, 191)},
 387     {"gray76", myRGB(194, 194, 194)},
 388     {"gray77", myRGB(196, 196, 196)},
 389     {"gray78", myRGB(199, 199, 199)},
 390     {"gray79", myRGB(201, 201, 201)},
 391     {"gray8", myRGB(20, 20, 20)},
 392     {"gray80", myRGB(204, 204, 204)},
 393     {"gray81", myRGB(207, 207, 207)},
 394     {"gray82", myRGB(209, 209, 209)},
 395     {"gray83", myRGB(212, 212, 212)},
 396     {"gray84", myRGB(214, 214, 214)},
 397     {"gray85", myRGB(217, 217, 217)},
 398     {"gray86", myRGB(219, 219, 219)},
 399     {"gray87", myRGB(222, 222, 222)},
 400     {"gray88", myRGB(224, 224, 224)},
 401     {"gray89", myRGB(227, 227, 227)},
 402     {"gray9", myRGB(23, 23, 23)},
 403     {"gray90", myRGB(229, 229, 229)},
 404     {"gray91", myRGB(232, 232, 232)},
 405     {"gray92", myRGB(235, 235, 235)},
 406     {"gray93", myRGB(237, 237, 237)},
 407     {"gray94", myRGB(240, 240, 240)},
 408     {"gray95", myRGB(242, 242, 242)},
 409     {"gray96", myRGB(245, 245, 245)},
 410     {"gray97", myRGB(247, 247, 247)},
 411     {"gray98", myRGB(250, 250, 250)},
 412     {"gray99", myRGB(252, 252, 252)},
 413     {"green", myRGB(0, 255, 0)},
 414     {"greenyellow", myRGB(173, 255, 47)},
 415     {"honeydew", myRGB(240, 255, 240)},
 416     {"hotpink", myRGB(255, 105, 180)},
 417     {"indianred", myRGB(107, 57, 57)},
 418     {"ivory", myRGB(255, 255, 240)},
 419     {"khaki", myRGB(179, 179, 126)},
 420     {"lavender", myRGB(230, 230, 250)},
 421     {"lavenderblush", myRGB(255, 240, 245)},
 422     {"lawngreen", myRGB(124, 252, 0)},
 423     {"lemonchiffon", myRGB(255, 250, 205)},
 424     {"lightblue", myRGB(176, 226, 255)},
 425     {"lightcoral", myRGB(240, 128, 128)},
 426     {"lightcyan", myRGB(224, 255, 255)},
 427     {"lightgoldenrod", myRGB(238, 221, 130)},
 428     {"lightgoldenrodyellow", myRGB(250, 250, 210)},
 429     {"lightgray", myRGB(168, 168, 168)},
 430     {"lightpink", myRGB(255, 182, 193)},
 431     {"lightsalmon", myRGB(255, 160, 122)},
 432     {"lightseagreen", myRGB(32, 178, 170)},
 433     {"lightskyblue", myRGB(135, 206, 250)},
 434     {"lightslateblue", myRGB(132, 112, 255)},
 435     {"lightslategray", myRGB(119, 136, 153)},
 436     {"lightsteelblue", myRGB(124, 152, 211)},
 437     {"lightyellow", myRGB(255, 255, 224)},
 438     {"limegreen", myRGB(0, 175, 20)},
 439     {"linen", myRGB(250, 240, 230)},
 440     {"magenta", myRGB(255, 0, 255)},
 441     {"maroon", myRGB(143, 0, 82)},
 442     {"mediumaquamarine", myRGB(0, 147, 143)},
 443     {"mediumblue", myRGB(50, 50, 204)},
 444     {"mediumforestgreen", myRGB(50, 129, 75)},
 445     {"mediumgoldenrod", myRGB(209, 193, 102)},
 446     {"mediumorchid", myRGB(189, 82, 189)},
 447     {"mediumpurple", myRGB(147, 112, 219)},
 448     {"mediumseagreen", myRGB(52, 119, 102)},
 449     {"mediumslateblue", myRGB(106, 106, 141)},
 450     {"mediumspringgreen", myRGB(35, 142, 35)},
 451     {"mediumturquoise", myRGB(0, 210, 210)},
 452     {"mediumvioletred", myRGB(213, 32, 121)},
 453     {"midnightblue", myRGB(47, 47, 100)},
 454     {"mintcream", myRGB(245, 255, 250)},
 455     {"mistyrose", myRGB(255, 228, 225)},
 456     {"moccasin", myRGB(255, 228, 181)},
 457     {"navajowhite", myRGB(255, 222, 173)},
 458     {"navy", myRGB(35, 35, 117)},
 459     {"navyblue", myRGB(35, 35, 117)},
 460     {"oldlace", myRGB(253, 245, 230)},
 461     {"olivedrab", myRGB(107, 142, 35)},
 462     {"orange", myRGB(255, 135, 0)},
 463     {"orangered", myRGB(255, 69, 0)},
 464     {"orchid", myRGB(239, 132, 239)},
 465     {"palegoldenrod", myRGB(238, 232, 170)},
 466     {"palegreen", myRGB(115, 222, 120)},
 467     {"paleturquoise", myRGB(175, 238, 238)},
 468     {"palevioletred", myRGB(219, 112, 147)},
 469     {"papayawhip", myRGB(255, 239, 213)},
 470     {"peachpuff", myRGB(255, 218, 185)},
 471     {"peru", myRGB(205, 133, 63)},
 472     {"pink", myRGB(255, 181, 197)},
 473     {"plum", myRGB(197, 72, 155)},
 474     {"powderblue", myRGB(176, 224, 230)},
 475     {"purple", myRGB(160, 32, 240)},
 476     {"red", myRGB(255, 0, 0)},
 477     {"rosybrown", myRGB(188, 143, 143)},
 478     {"royalblue", myRGB(65, 105, 225)},
 479     {"saddlebrown", myRGB(139, 69, 19)},
 480     {"salmon", myRGB(233, 150, 122)},
 481     {"sandybrown", myRGB(244, 164, 96)},
 482     {"seagreen", myRGB(82, 149, 132)},
 483     {"seashell", myRGB(255, 245, 238)},
 484     {"sienna", myRGB(150, 82, 45)},
 485     {"silver", myRGB(192, 192, 192)},
 486     {"skyblue", myRGB(114, 159, 255)},
 487     {"slateblue", myRGB(126, 136, 171)},
 488     {"slategray", myRGB(112, 128, 144)},
 489     {"snow", myRGB(255, 250, 250)},
 490     {"springgreen", myRGB(65, 172, 65)},
 491     {"steelblue", myRGB(84, 112, 170)},
 492     {"tan", myRGB(222, 184, 135)},
 493     {"thistle", myRGB(216, 191, 216)},
 494     {"tomato", myRGB(255, 99, 71)},
 495     {"transparent", myRGB(0, 0, 1)},
 496     {"turquoise", myRGB(25, 204, 223)},
 497     {"violet", myRGB(156, 62, 206)},
 498     {"violetred", myRGB(243, 62, 150)},
 499     {"wheat", myRGB(245, 222, 179)},
 500     {"white", myRGB(255, 255, 255)},
 501     {"whitesmoke", myRGB(245, 245, 245)},
 502     {"yellow", myRGB(255, 255, 0)},
 503     {"yellowgreen", myRGB(50, 216, 56)},
 504     {NULL, myRGB(0, 0, 0)}
 505 };
 506 static const int numTheRGBRecords = 235;
 507
 508 static unsigned char ParseHexadecimal(char digit1, char digit2)
 509 {
 510     unsigned char i1, i2;
 511
 512     if (digit1 >= 'a')
 513         i1 = (unsigned char)(digit1 - 'a' + 0x0A);
 514     else if (digit1 >= 'A')
 515         i1 = (unsigned char)(digit1 - 'A' + 0x0A);
 516     else
 517         i1 = (unsigned char)(digit1 - '0');
 518     if (digit2 >= 'a')
 519         i2 = (unsigned char)(digit2 - 'a' + 0x0A);
 520     else if (digit2 >= 'A')
 521         i2 = (unsigned char)(digit2 - 'A' + 0x0A);
 522     else
 523         i2 = (unsigned char)(digit2 - '0');
 524     return (unsigned char)(0x10 * i1 + i2);
 525 }
 526
 527 static bool GetRGBFromName(const char *inname, bool *isNone,
 528                            unsigned char *r, unsigned char*g, unsigned char *b)
 529 {
 530     int left, right, middle;
 531     int cmp;
 532     wxUint32 rgbVal;
 533     char *name;
 534     char *grey, *p;
 535
 536     // Neither #rrggbb nor #rrrrggggbbbb are in database, we parse them directly
 537     size_t inname_len = strlen(inname);
 538     if ( *inname == '#' && (inname_len == 7 || inname_len == 13))
 539     {
 540         size_t ofs = (inname_len == 7) ? 2 : 4;
 541         *r = ParseHexadecimal(inname[1], inname[2]);
 542         *g = ParseHexadecimal(inname[1*ofs+1], inname[1*ofs+2]);
 543         *b = ParseHexadecimal(inname[2*ofs+1], inname[2*ofs+2]);
 544         *isNone = false;
 545         return true;
 546     }
 547
 548     name = wxStrdupA(inname);
 549
 550     // theRGBRecords[] has no names with spaces, and no grey, but a
 551     // lot of gray...
 552
 553     // so first extract ' '
 554     while ((p = strchr(name, ' ')) != NULL)
 555     {
 556         while (*(p))            // till eof of string
 557         {
 558             *p = *(p + 1);      // copy to the left
 559             p++;
 560         }
 561     }
 562     // fold to lower case
 563     p = name;
 564     while (*p)
 565     {
 566         *p = (char)tolower(*p);
 567         p++;
 568     }
 569
 570     // substitute Grey with Gray, else rgbtab.h would have more than 100
 571     // 'duplicate' entries
 572     if ( (grey = strstr(name, "grey")) != NULL )
 573         grey[2] = 'a';
 574
 575     // check for special 'none' colour:
 576     bool found;
 577     if ( strcmp(name, "none") == 0 )
 578     {
 579         *isNone = true;
 580         found = true;
 581     }
 582     else // not "None"
 583     {
 584         found = false;
 585
 586         // binary search:
 587         left = 0;
 588         right = numTheRGBRecords - 1;
 589         do
 590         {
 591             middle = (left + right) / 2;
 592             cmp = strcmp(name, theRGBRecords[middle].name);
 593             if ( cmp == 0 )
 594             {
 595                 rgbVal = theRGBRecords[middle].rgb;
 596                 *r = (unsigned char)((rgbVal >> 16) & 0xFF);
 597                 *g = (unsigned char)((rgbVal >> 8) & 0xFF);
 598                 *b = (unsigned char)((rgbVal) & 0xFF);
 599                 *isNone = false;
 600                 found = true;
 601                 break;
 602             }
 603             else if ( cmp < 0 )
 604             {
 605                 right = middle - 1;
 606             }
 607             else // cmp > 0
 608             {
 609                 left = middle + 1;
 610             }
 611         } while (left <= right);
 612     }
 613
 614     free(name);
 615
 616     return found;
 617 }
 618
 619 static const char *ParseColor(const char *data)
 620 {
 621     static const char *targets[] =
 622                         {"c ", "g ", "g4 ", "m ", "b ", "s ", NULL};
 623
 624     const char *p, *r;
 625     const char *q;
 626     int i;
 627
 628     for (i = 0; targets[i] != NULL; i++)
 629     {
 630         r = data;
 631         for (q = targets[i]; *r != '\0'; r++)
 632         {
 633             if ( *r != *q )
 634                 continue;
 635             if ( !isspace((int) (*(r - 1))) )
 636                 continue;
 637             p = r;
 638             for (;;)
 639             {
 640                 if ( *q == '\0' )
 641                     return p;
 642                 if ( *p++ != *q++ )
 643                     break;
 644             }
 645             q = targets[i];
 646         }
 647     }
 648     return NULL;
 649 }
 650
 651 struct wxXPMColourMapData
 652 {
 653     wxXPMColourMapData() { R = G = B = 0; }
 654     unsigned char R,G,B;
 655 };
 656 WX_DECLARE_STRING_HASH_MAP(wxXPMColourMapData, wxXPMColourMap);
 657
 658 wxImage wxXPMDecoder::ReadData(const char* const* xpm_data)
 659 {
 660     wxCHECK_MSG(xpm_data, wxNullImage, wxT("NULL XPM data") );
 661
 662     wxImage img;
 663     int count;
 664     unsigned width, height, colors_cnt, chars_per_pixel;
 665     size_t i, j, i_key;
 666     char key[64];
 667     const char *clr_def;
 668     wxXPMColourMap clr_tbl;
 669     wxXPMColourMap::iterator it;
 670     wxString maskKey;
 671     wxString keyString;
 672
 673     /*
 674      *  Read hints and initialize structures:
 675      */
 676
 677     count = sscanf(xpm_data[0], "%u %u %u %u",
 678                    &width, &height, &colors_cnt, &chars_per_pixel);
 679     if ( count != 4 || width * height * colors_cnt == 0 )
 680     {
 681         wxLogError(_("XPM: incorrect header format!"));
 682         return wxNullImage;
 683     }
 684
 685     // VS: XPM color map this large would be insane, since XPMs are encoded with
 686     //     92 possible values on each position, 92^64 is *way* larger space than
 687     //     8bit RGB...
 688     wxCHECK_MSG(chars_per_pixel < 64, wxNullImage, wxT("XPM colormaps this large not supported."));
 689
 690     if (!img.Create(width, height, false))
 691         return wxNullImage;
 692
 693     key[chars_per_pixel] = '\0';
 694
 695     /*
 696      *  Create colour map:
 697      */
 698     wxXPMColourMapData clr_data;
 699     for (i = 0; i < colors_cnt; i++)
 700     {
 701         const char *xmpColLine = xpm_data[1 + i];
 702
 703         // we must have at least " x y" after the colour index, hence +5
 704         if ( !xmpColLine || strlen(xmpColLine) < chars_per_pixel + 5 )
 705         {
 706             wxLogError(_("XPM: incorrect colour description in line %d"),
 707                        (int)(1 + i));
 708             return wxNullImage;
 709         }
 710
 711         for (i_key = 0; i_key < chars_per_pixel; i_key++)
 712             key[i_key] = xmpColLine[i_key];
 713         clr_def = ParseColor(xmpColLine + chars_per_pixel);
 714
 715         if ( clr_def == NULL )
 716         {
 717             wxLogError(_("XPM: malformed colour definition '%s' at line %d!"),
 718                        xmpColLine, (int)(1 + i));
 719             return wxNullImage;
 720         }
 721
 722         bool isNone = false;
 723         if ( !GetRGBFromName(clr_def, &isNone,
 724                              &clr_data.R, &clr_data.G, &clr_data.B) )
 725         {
 726             wxLogError(_("XPM: malformed colour definition '%s' at line %d!"),
 727                        xmpColLine, (int)(1 + i));
 728             return wxNullImage;
 729         }
 730
 731         keyString = key;
 732         if ( isNone )
 733             maskKey = keyString;
 734
 735         clr_tbl[keyString] = clr_data;
 736     }
 737
 738     // deal with the mask: we must replace pseudo-colour "None" with the mask
 739     // colour (which can be any colour not otherwise used in the image)
 740     if (!maskKey.empty())
 741     {
 742         wxLongToLongHashMap rgb_table;
 743         long rgb;
 744         const size_t n = clr_tbl.size();
 745         wxXPMColourMap::const_iterator iter = clr_tbl.begin();
 746         for (i = 0; i < n; ++i, ++iter)
 747         {
 748             const wxXPMColourMapData& data = iter->second;
 749             rgb = (data.R << 16) + (data.G << 8) + data.B;
 750             rgb_table[rgb];
 751         }
 752         for (rgb = 0; rgb <= 0xffffff && rgb_table.count(rgb); ++rgb)
 753             ;
 754         if (rgb > 0xffffff)
 755         {
 756             wxLogError(_("XPM: no colors left to use for mask!"));
 757             return wxNullImage;
 758         }
 759
 760         wxXPMColourMapData& maskData = clr_tbl[maskKey];
 761         maskData.R = wxByte(rgb >> 16);
 762         maskData.G = wxByte(rgb >> 8);
 763         maskData.B = wxByte(rgb);
 764
 765         img.SetMaskColour(maskData.R, maskData.G, maskData.B);
 766     }
 767
 768     /*
 769      *  Parse image data:
 770      */
 771
 772     unsigned char *img_data = img.GetData();
 773     wxXPMColourMap::iterator entry;
 774     wxXPMColourMap::iterator end = clr_tbl.end();
 775
 776     for (j = 0; j < height; j++)
 777     {
 778         for (i = 0; i < width; i++, img_data += 3)
 779         {
 780             const char *xpmImgLine = xpm_data[1 + colors_cnt + j];
 781             if ( !xpmImgLine || strlen(xpmImgLine) < width*chars_per_pixel )
 782             {
 783                 wxLogError(_("XPM: truncated image data at line %d!"),
 784                            (int)(1 + colors_cnt + j));
 785                 return wxNullImage;
 786             }
 787
 788             for (i_key = 0; i_key < chars_per_pixel; i_key++)
 789             {
 790                 key[i_key] = xpmImgLine[chars_per_pixel * i + i_key];
 791             }
 792
 793             keyString = key;
 794             entry = clr_tbl.find(keyString);
 795             if ( entry == end )
 796             {
 797                 wxLogError(_("XPM: Malformed pixel data!"));
 798
 799                 // better return right now as otherwise we risk to flood the
 800                 // user with error messages as something seems to be seriously
 801                 // wrong with the file and so we could give this message for
 802                 // each remaining pixel if we don't bail out
 803                 return wxNullImage;
 804             }
 805
 806             img_data[0] = entry->second.R;
 807             img_data[1] = entry->second.G;
 808             img_data[2] = entry->second.B;
 809         }
 810     }
 811 #if wxUSE_PALETTE
 812     unsigned char* r = new unsigned char[colors_cnt];
 813     unsigned char* g = new unsigned char[colors_cnt];
 814     unsigned char* b = new unsigned char[colors_cnt];
 815
 816     for (it = clr_tbl.begin(), i = 0; it != clr_tbl.end(); it++, i++)
 817     {
 818         r[i] = it->second.R;
 819         g[i] = it->second.G;
 820         b[i] = it->second.B;
 821     }
 822     wxASSERT(i == colors_cnt);
 823     img.SetPalette(wxPalette(colors_cnt, r, g, b));
 824     delete[] r;
 825     delete[] g;
 826     delete[] b;
 827 #endif // wxUSE_PALETTE
 828     return img;
 829 }
 830
 831 #endif // wxUSE_IMAGE && wxUSE_XPM