src/common/xpmdecod.cpp

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