src/common/xpmdecod.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        xpmdecod.cpp
   3 // Purpose:     wxXPMDecoder
   4 // Author:      John Cristy, Vaclav Slavik
   5 // RCS-ID:      $Id$
   6 // Copyright:   (c) John Cristy, Vaclav Slavik
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 /*
  11
  12 This file is partially based on source code of ImageMagick by John Cristy. Its
  13 license is as follows:
  14
  15 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  16 %                                                                             %
  17 %                                                                             %
  18 %                                                                             %
  19 %                            X   X  PPPP   M   M                              %
  20 %                             X X   P   P  MM MM                              %
  21 %                              X    PPPP   M M M                              %
  22 %                             X X   P      M   M                              %
  23 %                            X   X  P      M   M                              %
  24 %                                                                             %
  25 %                                                                             %
  26 %                    Read/Write ImageMagick Image Format.                     %
  27 %                                                                             %
  28 %                                                                             %
  29 %                              Software Design                                %
  30 %                                John Cristy                                  %
  31 %                                 July 1992                                   %
  32 %                                                                             %
  33 %                                                                             %
  34 %  Copyright (C) 2001 ImageMagick Studio, a non-profit organization dedicated %
  35 %  to making software imaging solutions freely available.                     %
  36 %                                                                             %
  37 %  Permission is hereby granted, free of charge, to any person obtaining a    %
  38 %  copy of this software and associated documentation files ("ImageMagick"),  %
  39 %  to deal in ImageMagick without restriction, including without limitation   %
  40 %  the rights to use, copy, modify, merge, publish, distribute, sublicense,   %
  41 %  and/or sell copies of ImageMagick, and to permit persons to whom the       %
  42 %  ImageMagick is furnished to do so, subject to the following conditions:    %
  43 %                                                                             %
  44 %  The above copyright notice and this permission notice shall be included in %
  45 %  all copies or substantial portions of ImageMagick.                         %
  46 %                                                                             %
  47 %  The software is provided "as is", without warranty of any kind, express or %
  48 %  implied, including but not limited to the warranties of merchantability,   %
  49 %  fitness for a particular purpose and noninfringement.  In no event shall   %
  50 %  ImageMagick Studio be liable for any claim, damages or other liability,    %
  51 %  whether in an action of contract, tort or otherwise, arising from, out of  %
  52 %  or in connection with ImageMagick or the use or other dealings in          %
  53 %  ImageMagick.                                                               %
  54 %                                                                             %
  55 %  Except as contained in this notice, the name of the ImageMagick Studio     %
  56 %  shall not be used in advertising or otherwise to promote the sale, use or  %
  57 %  other dealings in ImageMagick without prior written authorization from the %
  58 %  ImageMagick Studio.                                                        %
  59 %                                                                             %
  60 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  61 %
  62 %
  63 */
  64
  65 /*
  66  * Also contains some pieces from libxpm and its modification for win32 by
  67  * HeDu <hedu@cul-ipn.uni-kiel.de>:
  68  *
  69  * Copyright (C) 1989-95 GROUPE BULL
  70  *
  71  * Permission is hereby granted, free of charge, to any person obtaining a copy
  72  * of this software and associated documentation files (the "Software"), to
  73  * deal in the Software without restriction, including without limitation the
  74  * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
  75  * sell copies of the Software, and to permit persons to whom the Software is
  76  * furnished to do so, subject to the following conditions:
  77  *
  78  * The above copyright notice and this permission notice shall be included in
  79  * all copies or substantial portions of the Software.
  80  *
  81  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  82  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  83  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  84  * GROUPE BULL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  85  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  86  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  87  *
  88  * Except as contained in this notice, the name of GROUPE BULL shall not be
  89  * used in advertising or otherwise to promote the sale, use or other dealings
  90  * in this Software without prior written authorization from GROUPE BULL.
  91  */
  92
  93 #ifdef __GNUG__
  94 #pragma implementation "xpmdecod.h"
  95 #endif
  96
  97 // For compilers that support precompilation, includes "wx.h".
  98 #include "wx/wxprec.h"
  99
 100 #ifdef __BORLANDC__
 101 #  pragma hdrstop
 102 #endif
 103
 104 #ifndef WX_PRECOMP
 105 #  include "wx/defs.h"
 106 #endif
 107
 108 #if wxUSE_IMAGE && wxUSE_XPM
 109
 110 #include "wx/stream.h"
 111 #include "wx/image.h"
 112 #include "wx/utils.h"
 113 #include "wx/log.h"
 114 #include "wx/intl.h"
 115 #include <string.h>
 116
 117 #include "wx/xpmdecod.h"
 118
 119 #if wxUSE_STREAMS
 120 bool wxXPMDecoder::CanRead(wxInputStream& stream)
 121 {
 122     unsigned char buf[9];
 123
 124     stream.Read(buf, 9);
 125     stream.SeekI(-9, wxFromCurrent);
 126
 127     return (memcmp(buf, "/* XPM */", 9) == 0);
 128 }
 129
 130 wxImage wxXPMDecoder::ReadFile(wxInputStream& stream)
 131 {
 132     size_t length = stream.GetSize();
 133     wxCHECK_MSG(length != 0, wxNullImage, wxT("Cannot read XPM from stream of unknown size"));
 134
 135     char *xpm_buffer = new char[length+1];
 136     char *p, *q;
 137     size_t i;
 138
 139     if ( stream.Read(xpm_buffer, length).LastError() == wxSTREAM_READ_ERROR )
 140         return wxNullImage;
 141     xpm_buffer[length] = '\0';
 142
 143     /*
 144      *  Remove comments from the file:
 145      */
 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         strcpy(p, q + 2);
 174     }
 175
 176     /*
 177      *  Remove unquoted characters:
 178      */
 179     i = 0;
 180     for (p = xpm_buffer; *p != '\0'; p++)
 181     {
 182         if ( *p != '"' )
 183             continue;
 184         for (q = p + 1; *q != '\0'; q++)
 185             if (*q == '"')
 186                 break;
 187         strncpy(xpm_buffer + i, p + 1, q - p - 1);
 188         i += q - p - 1;
 189         xpm_buffer[i++] = '\n';
 190         p = q + 1;
 191     }
 192     xpm_buffer[i] = '\0';
 193
 194     /*
 195      *  Create array of lines and convert \n's to \0's:
 196      */
 197     const char **xpm_lines;
 198     size_t lines_cnt = 0;
 199     size_t line;
 200
 201     for (p = xpm_buffer; *p != '\0'; p++)
 202     {
 203         if ( *p == '\n' )
 204             lines_cnt++;
 205     }
 206
 207     if ( !lines_cnt )
 208     {
 209         // this doesn't really look an XPM image
 210         return wxNullImage;
 211     }
 212
 213     xpm_lines = new const char*[lines_cnt];
 214     xpm_lines[0] = xpm_buffer;
 215     line = 1;
 216     for (p = xpm_buffer; (*p != '\0') && (line < lines_cnt); p++)
 217     {
 218         if ( *p == '\n' )
 219         {
 220             xpm_lines[line] = p + 1;
 221             *p = '\0';
 222             line++;
 223         }
 224     }
 225
 226     /*
 227      *  Read the image:
 228      */
 229     wxImage img = ReadData(xpm_lines);
 230
 231     delete[] xpm_buffer;
 232 #ifdef __WIN16__
 233     delete[] (char**) xpm_lines;
 234 #else
 235     delete[] xpm_lines;
 236 #endif
 237     return img;
 238 }
 239 #endif // wxUSE_STREAMS
 240
 241
 242 /*****************************************************************************\
 243 * rgbtab.h                                                                    *
 244 *                                                                             *
 245 * A hard coded rgb.txt. To keep it short I removed all colornames with        *
 246 * trailing numbers, Blue3 etc, except the GrayXX. Sorry Grey-lovers I prefer  *
 247 * Gray ;-). But Grey is recognized on lookups, only on save Gray will be      *
 248 * used, maybe you want to do some substitue there too.                        *
 249 *                                                                             *
 250 * To save memory the RGBs are coded in one long value, as done by the RGB     *
 251 * macro.                                                                      *
 252 *                                                                             *
 253 * Developed by HeDu 3/94 (hedu@cul-ipn.uni-kiel.de)                           *
 254 \*****************************************************************************/
 255
 256
 257 typedef struct
 258 {
 259     char *name;
 260     wxUint32 rgb;
 261 } rgbRecord;
 262
 263 #define myRGB(r,g,b)   ((wxUint32)r<<16|(wxUint32)g<<8|(wxUint32)b)
 264
 265 static rgbRecord theRGBRecords[] =
 266 {
 267     {"aliceblue", myRGB(240, 248, 255)},
 268     {"antiquewhite", myRGB(250, 235, 215)},
 269     {"aquamarine", myRGB(50, 191, 193)},
 270     {"azure", myRGB(240, 255, 255)},
 271     {"beige", myRGB(245, 245, 220)},
 272     {"bisque", myRGB(255, 228, 196)},
 273     {"black", myRGB(0, 0, 0)},
 274     {"blanchedalmond", myRGB(255, 235, 205)},
 275     {"blue", myRGB(0, 0, 255)},
 276     {"blueviolet", myRGB(138, 43, 226)},
 277     {"brown", myRGB(165, 42, 42)},
 278     {"burlywood", myRGB(222, 184, 135)},
 279     {"cadetblue", myRGB(95, 146, 158)},
 280     {"chartreuse", myRGB(127, 255, 0)},
 281     {"chocolate", myRGB(210, 105, 30)},
 282     {"coral", myRGB(255, 114, 86)},
 283     {"cornflowerblue", myRGB(34, 34, 152)},
 284     {"cornsilk", myRGB(255, 248, 220)},
 285     {"cyan", myRGB(0, 255, 255)},
 286     {"darkgoldenrod", myRGB(184, 134, 11)},
 287     {"darkgreen", myRGB(0, 86, 45)},
 288     {"darkkhaki", myRGB(189, 183, 107)},
 289     {"darkolivegreen", myRGB(85, 86, 47)},
 290     {"darkorange", myRGB(255, 140, 0)},
 291     {"darkorchid", myRGB(139, 32, 139)},
 292     {"darksalmon", myRGB(233, 150, 122)},
 293     {"darkseagreen", myRGB(143, 188, 143)},
 294     {"darkslateblue", myRGB(56, 75, 102)},
 295     {"darkslategray", myRGB(47, 79, 79)},
 296     {"darkturquoise", myRGB(0, 166, 166)},
 297     {"darkviolet", myRGB(148, 0, 211)},
 298     {"deeppink", myRGB(255, 20, 147)},
 299     {"deepskyblue", myRGB(0, 191, 255)},
 300     {"dimgray", myRGB(84, 84, 84)},
 301     {"dodgerblue", myRGB(30, 144, 255)},
 302     {"firebrick", myRGB(142, 35, 35)},
 303     {"floralwhite", myRGB(255, 250, 240)},
 304     {"forestgreen", myRGB(80, 159, 105)},
 305     {"gainsboro", myRGB(220, 220, 220)},
 306     {"ghostwhite", myRGB(248, 248, 255)},
 307     {"gold", myRGB(218, 170, 0)},
 308     {"goldenrod", myRGB(239, 223, 132)},
 309     {"gray", myRGB(126, 126, 126)},
 310     {"gray0", myRGB(0, 0, 0)},
 311     {"gray1", myRGB(3, 3, 3)},
 312     {"gray10", myRGB(26, 26, 26)},
 313     {"gray100", myRGB(255, 255, 255)},
 314     {"gray11", myRGB(28, 28, 28)},
 315     {"gray12", myRGB(31, 31, 31)},
 316     {"gray13", myRGB(33, 33, 33)},
 317     {"gray14", myRGB(36, 36, 36)},
 318     {"gray15", myRGB(38, 38, 38)},
 319     {"gray16", myRGB(41, 41, 41)},
 320     {"gray17", myRGB(43, 43, 43)},
 321     {"gray18", myRGB(46, 46, 46)},
 322     {"gray19", myRGB(48, 48, 48)},
 323     {"gray2", myRGB(5, 5, 5)},
 324     {"gray20", myRGB(51, 51, 51)},
 325     {"gray21", myRGB(54, 54, 54)},
 326     {"gray22", myRGB(56, 56, 56)},
 327     {"gray23", myRGB(59, 59, 59)},
 328     {"gray24", myRGB(61, 61, 61)},
 329     {"gray25", myRGB(64, 64, 64)},
 330     {"gray26", myRGB(66, 66, 66)},
 331     {"gray27", myRGB(69, 69, 69)},
 332     {"gray28", myRGB(71, 71, 71)},
 333     {"gray29", myRGB(74, 74, 74)},
 334     {"gray3", myRGB(8, 8, 8)},
 335     {"gray30", myRGB(77, 77, 77)},
 336     {"gray31", myRGB(79, 79, 79)},
 337     {"gray32", myRGB(82, 82, 82)},
 338     {"gray33", myRGB(84, 84, 84)},
 339     {"gray34", myRGB(87, 87, 87)},
 340     {"gray35", myRGB(89, 89, 89)},
 341     {"gray36", myRGB(92, 92, 92)},
 342     {"gray37", myRGB(94, 94, 94)},
 343     {"gray38", myRGB(97, 97, 97)},
 344     {"gray39", myRGB(99, 99, 99)},
 345     {"gray4", myRGB(10, 10, 10)},
 346     {"gray40", myRGB(102, 102, 102)},
 347     {"gray41", myRGB(105, 105, 105)},
 348     {"gray42", myRGB(107, 107, 107)},
 349     {"gray43", myRGB(110, 110, 110)},
 350     {"gray44", myRGB(112, 112, 112)},
 351     {"gray45", myRGB(115, 115, 115)},
 352     {"gray46", myRGB(117, 117, 117)},
 353     {"gray47", myRGB(120, 120, 120)},
 354     {"gray48", myRGB(122, 122, 122)},
 355     {"gray49", myRGB(125, 125, 125)},
 356     {"gray5", myRGB(13, 13, 13)},
 357     {"gray50", myRGB(127, 127, 127)},
 358     {"gray51", myRGB(130, 130, 130)},
 359     {"gray52", myRGB(133, 133, 133)},
 360     {"gray53", myRGB(135, 135, 135)},
 361     {"gray54", myRGB(138, 138, 138)},
 362     {"gray55", myRGB(140, 140, 140)},
 363     {"gray56", myRGB(143, 143, 143)},
 364     {"gray57", myRGB(145, 145, 145)},
 365     {"gray58", myRGB(148, 148, 148)},
 366     {"gray59", myRGB(150, 150, 150)},
 367     {"gray6", myRGB(15, 15, 15)},
 368     {"gray60", myRGB(153, 153, 153)},
 369     {"gray61", myRGB(156, 156, 156)},
 370     {"gray62", myRGB(158, 158, 158)},
 371     {"gray63", myRGB(161, 161, 161)},
 372     {"gray64", myRGB(163, 163, 163)},
 373     {"gray65", myRGB(166, 166, 166)},
 374     {"gray66", myRGB(168, 168, 168)},
 375     {"gray67", myRGB(171, 171, 171)},
 376     {"gray68", myRGB(173, 173, 173)},
 377     {"gray69", myRGB(176, 176, 176)},
 378     {"gray7", myRGB(18, 18, 18)},
 379     {"gray70", myRGB(179, 179, 179)},
 380     {"gray71", myRGB(181, 181, 181)},
 381     {"gray72", myRGB(184, 184, 184)},
 382     {"gray73", myRGB(186, 186, 186)},
 383     {"gray74", myRGB(189, 189, 189)},
 384     {"gray75", myRGB(191, 191, 191)},
 385     {"gray76", myRGB(194, 194, 194)},
 386     {"gray77", myRGB(196, 196, 196)},
 387     {"gray78", myRGB(199, 199, 199)},
 388     {"gray79", myRGB(201, 201, 201)},
 389     {"gray8", myRGB(20, 20, 20)},
 390     {"gray80", myRGB(204, 204, 204)},
 391     {"gray81", myRGB(207, 207, 207)},
 392     {"gray82", myRGB(209, 209, 209)},
 393     {"gray83", myRGB(212, 212, 212)},
 394     {"gray84", myRGB(214, 214, 214)},
 395     {"gray85", myRGB(217, 217, 217)},
 396     {"gray86", myRGB(219, 219, 219)},
 397     {"gray87", myRGB(222, 222, 222)},
 398     {"gray88", myRGB(224, 224, 224)},
 399     {"gray89", myRGB(227, 227, 227)},
 400     {"gray9", myRGB(23, 23, 23)},
 401     {"gray90", myRGB(229, 229, 229)},
 402     {"gray91", myRGB(232, 232, 232)},
 403     {"gray92", myRGB(235, 235, 235)},
 404     {"gray93", myRGB(237, 237, 237)},
 405     {"gray94", myRGB(240, 240, 240)},
 406     {"gray95", myRGB(242, 242, 242)},
 407     {"gray96", myRGB(245, 245, 245)},
 408     {"gray97", myRGB(247, 247, 247)},
 409     {"gray98", myRGB(250, 250, 250)},
 410     {"gray99", myRGB(252, 252, 252)},
 411     {"green", myRGB(0, 255, 0)},
 412     {"greenyellow", myRGB(173, 255, 47)},
 413     {"honeydew", myRGB(240, 255, 240)},
 414     {"hotpink", myRGB(255, 105, 180)},
 415     {"indianred", myRGB(107, 57, 57)},
 416     {"ivory", myRGB(255, 255, 240)},
 417     {"khaki", myRGB(179, 179, 126)},
 418     {"lavender", myRGB(230, 230, 250)},
 419     {"lavenderblush", myRGB(255, 240, 245)},
 420     {"lawngreen", myRGB(124, 252, 0)},
 421     {"lemonchiffon", myRGB(255, 250, 205)},
 422     {"lightblue", myRGB(176, 226, 255)},
 423     {"lightcoral", myRGB(240, 128, 128)},
 424     {"lightcyan", myRGB(224, 255, 255)},
 425     {"lightgoldenrod", myRGB(238, 221, 130)},
 426     {"lightgoldenrodyellow", myRGB(250, 250, 210)},
 427     {"lightgray", myRGB(168, 168, 168)},
 428     {"lightpink", myRGB(255, 182, 193)},
 429     {"lightsalmon", myRGB(255, 160, 122)},
 430     {"lightseagreen", myRGB(32, 178, 170)},
 431     {"lightskyblue", myRGB(135, 206, 250)},
 432     {"lightslateblue", myRGB(132, 112, 255)},
 433     {"lightslategray", myRGB(119, 136, 153)},
 434     {"lightsteelblue", myRGB(124, 152, 211)},
 435     {"lightyellow", myRGB(255, 255, 224)},
 436     {"limegreen", myRGB(0, 175, 20)},
 437     {"linen", myRGB(250, 240, 230)},
 438     {"magenta", myRGB(255, 0, 255)},
 439     {"maroon", myRGB(143, 0, 82)},
 440     {"mediumaquamarine", myRGB(0, 147, 143)},
 441     {"mediumblue", myRGB(50, 50, 204)},
 442     {"mediumforestgreen", myRGB(50, 129, 75)},
 443     {"mediumgoldenrod", myRGB(209, 193, 102)},
 444     {"mediumorchid", myRGB(189, 82, 189)},
 445     {"mediumpurple", myRGB(147, 112, 219)},
 446     {"mediumseagreen", myRGB(52, 119, 102)},
 447     {"mediumslateblue", myRGB(106, 106, 141)},
 448     {"mediumspringgreen", myRGB(35, 142, 35)},
 449     {"mediumturquoise", myRGB(0, 210, 210)},
 450     {"mediumvioletred", myRGB(213, 32, 121)},
 451     {"midnightblue", myRGB(47, 47, 100)},
 452     {"mintcream", myRGB(245, 255, 250)},
 453     {"mistyrose", myRGB(255, 228, 225)},
 454     {"moccasin", myRGB(255, 228, 181)},
 455     {"navajowhite", myRGB(255, 222, 173)},
 456     {"navy", myRGB(35, 35, 117)},
 457     {"navyblue", myRGB(35, 35, 117)},
 458     {"oldlace", myRGB(253, 245, 230)},
 459     {"olivedrab", myRGB(107, 142, 35)},
 460     {"orange", myRGB(255, 135, 0)},
 461     {"orangered", myRGB(255, 69, 0)},
 462     {"orchid", myRGB(239, 132, 239)},
 463     {"palegoldenrod", myRGB(238, 232, 170)},
 464     {"palegreen", myRGB(115, 222, 120)},
 465     {"paleturquoise", myRGB(175, 238, 238)},
 466     {"palevioletred", myRGB(219, 112, 147)},
 467     {"papayawhip", myRGB(255, 239, 213)},
 468     {"peachpuff", myRGB(255, 218, 185)},
 469     {"peru", myRGB(205, 133, 63)},
 470     {"pink", myRGB(255, 181, 197)},
 471     {"plum", myRGB(197, 72, 155)},
 472     {"powderblue", myRGB(176, 224, 230)},
 473     {"purple", myRGB(160, 32, 240)},
 474     {"red", myRGB(255, 0, 0)},
 475     {"rosybrown", myRGB(188, 143, 143)},
 476     {"royalblue", myRGB(65, 105, 225)},
 477     {"saddlebrown", myRGB(139, 69, 19)},
 478     {"salmon", myRGB(233, 150, 122)},
 479     {"sandybrown", myRGB(244, 164, 96)},
 480     {"seagreen", myRGB(82, 149, 132)},
 481     {"seashell", myRGB(255, 245, 238)},
 482     {"sienna", myRGB(150, 82, 45)},
 483     {"skyblue", myRGB(114, 159, 255)},
 484     {"slateblue", myRGB(126, 136, 171)},
 485     {"slategray", myRGB(112, 128, 144)},
 486     {"snow", myRGB(255, 250, 250)},
 487     {"springgreen", myRGB(65, 172, 65)},
 488     {"steelblue", myRGB(84, 112, 170)},
 489     {"tan", myRGB(222, 184, 135)},
 490     {"thistle", myRGB(216, 191, 216)},
 491     {"tomato", myRGB(255, 99, 71)},
 492     {"transparent", myRGB(0, 0, 1)},
 493     {"turquoise", myRGB(25, 204, 223)},
 494     {"violet", myRGB(156, 62, 206)},
 495     {"violetred", myRGB(243, 62, 150)},
 496     {"wheat", myRGB(245, 222, 179)},
 497     {"white", myRGB(255, 255, 255)},
 498     {"whitesmoke", myRGB(245, 245, 245)},
 499     {"yellow", myRGB(255, 255, 0)},
 500     {"yellowgreen", myRGB(50, 216, 56)},
 501     {NULL, myRGB(0, 0, 0)}
 502 };
 503 static int numTheRGBRecords = 234;
 504
 505 static unsigned char ParseHexadecimal(char digit1, char digit2)
 506 {
 507     unsigned char i1, i2;
 508
 509     if (digit1 >= 'a')
 510         i1 = digit1 - 'a' + 0x0A;
 511     else if (digit1 >= 'A')
 512         i1 = digit1 - 'A' + 0x0A;
 513     else
 514         i1 = digit1 - '0';
 515     if (digit2 >= 'a')
 516         i2 = digit2 - 'a' + 0x0A;
 517     else if (digit2 >= 'A')
 518         i2 = digit2 - 'A' + 0x0A;
 519     else
 520         i2 = digit2 - '0';
 521     return (0x10 * i1 + i2);
 522 }
 523
 524 static bool GetRGBFromName(const char *inname, bool *isNone,
 525                            unsigned char *r, unsigned char*g, unsigned char *b)
 526 {
 527     int left, right, middle;
 528     int cmp;
 529     wxUint32 rgbVal;
 530     char *name;
 531     char *grey, *p;
 532
 533     // Neither #rrggbb nor #rrrrggggbbbb are in database, we parse them directly
 534     size_t inname_len = strlen(inname);
 535     if ( *inname == '#' && (inname_len == 7 || inname_len == 13))
 536     {
 537         size_t ofs = (inname_len == 7) ? 2 : 4;
 538         *r = ParseHexadecimal(inname[1], inname[2]);
 539         *g = ParseHexadecimal(inname[1*ofs+1], inname[1*ofs+2]);
 540         *b = ParseHexadecimal(inname[2*ofs+1], inname[2*ofs+2]);
 541         *isNone = FALSE;
 542         return TRUE;
 543     }
 544
 545     name = strdup(inname);
 546
 547     // theRGBRecords[] has no names with spaces, and no grey, but a
 548     // lot of gray...
 549
 550     // so first extract ' '
 551     while ((p = strchr(name, ' ')) != NULL)
 552     {
 553         while (*(p))            // till eof of string
 554         {
 555             *p = *(p + 1);      // copy to the left
 556             p++;
 557         }
 558     }
 559     // fold to lower case
 560     p = name;
 561     while (*p)
 562     {
 563         *p = tolower(*p);
 564         p++;
 565     }
 566
 567     // substitute Grey with Gray, else rgbtab.h would have more than 100
 568     // 'duplicate' entries
 569     if ( (grey = strstr(name, "grey")) != NULL )
 570         grey[2] = 'a';
 571
 572     // check for special 'none' colour:
 573     bool found;
 574     if ( strcmp(name, "none") == 0 )
 575     {
 576         *isNone = TRUE;
 577         found = TRUE;
 578     }
 579     else // not "None"
 580     {
 581         found = FALSE;
 582
 583         // binary search:
 584         left = 0;
 585         right = numTheRGBRecords - 1;
 586         do
 587         {
 588             middle = (left + right) / 2;
 589             cmp = strcmp(name, theRGBRecords[middle].name);
 590             if ( cmp == 0 )
 591             {
 592                 rgbVal = theRGBRecords[middle].rgb;
 593                 *r = (unsigned char)((rgbVal >> 16) & 0xFF);
 594                 *g = (unsigned char)((rgbVal >> 8) & 0xFF);
 595                 *b = (unsigned char)((rgbVal) & 0xFF);
 596                 *isNone = FALSE;
 597                 found = TRUE;
 598                 break;
 599             }
 600             else if ( cmp < 0 )
 601             {
 602                 right = middle - 1;
 603             }
 604             else // cmp > 0
 605             {
 606                 left = middle + 1;
 607             }
 608         } while (left <= right);
 609     }
 610
 611     free(name);
 612
 613     return found;
 614 }
 615
 616 static const char *ParseColor(const char *data)
 617 {
 618     static const char *targets[] =
 619                         {"c ", "g ", "g4 ", "m ", "b ", "s ", NULL};
 620
 621     const char *p, *r;
 622     const char *q;
 623     int i;
 624
 625     for (i = 0; targets[i] != NULL; i++)
 626     {
 627         r = data;
 628         for (q = targets[i]; *r != '\0'; r++)
 629         {
 630             if ( *r != *q )
 631                 continue;
 632             if ( !isspace((int) (*(r - 1))) )
 633                 continue;
 634             p = r;
 635             for (;;)
 636             {
 637                 if ( *q == '\0' )
 638                     return p;
 639                 if ( *p++ != *q++ )
 640                     break;
 641             }
 642             q = targets[i];
 643         }
 644     }
 645     return NULL;
 646 }
 647
 648 class wxXPMColourMapData : public wxObject
 649 {
 650     public:
 651         unsigned char R,G,B;
 652 };
 653
 654 wxImage wxXPMDecoder::ReadData(const char **xpm_data)
 655 {
 656     wxImage img;
 657     int count;
 658     unsigned width, height, colors_cnt, chars_per_pixel;
 659     size_t i, j, i_key;
 660     wxChar key[64];
 661     const char *clr_def;
 662     bool hasMask;
 663     wxXPMColourMapData *clr_data;
 664     wxHashTable clr_tbl(wxKEY_STRING);
 665
 666     /*
 667      *  Read hints and initialize structures:
 668      */
 669
 670     count = sscanf(xpm_data[0], "%u %u %u %u",
 671                    &width, &height, &colors_cnt, &chars_per_pixel);
 672     if ( count != 4 || width * height * colors_cnt == 0 )
 673     {
 674         wxLogError(_T("XPM: Not XPM data!"));
 675         return wxNullImage;
 676     }
 677
 678     // VS: XPM color map this large would be insane, since XPMs are encoded with
 679     //     92 possible values on each position, 92^64 is *way* larger space than
 680     //     8bit RGB...
 681     wxCHECK_MSG(chars_per_pixel < 64, wxNullImage, wxT("XPM colormaps this large not supported."));
 682
 683     img.Create(width, height);
 684     if ( !img.Ok() ) return img;
 685
 686     img.SetMask(FALSE);
 687     key[chars_per_pixel] = wxT('\0');
 688     hasMask = FALSE;
 689     clr_tbl.DeleteContents(TRUE);
 690
 691     /*
 692      *  Create colour map:
 693      */
 694     for (i = 0; i < colors_cnt; i++)
 695     {
 696         for (i_key = 0; i_key < chars_per_pixel; i_key++)
 697             key[i_key] = (wxChar)xpm_data[1 + i][i_key];
 698         clr_def = ParseColor(xpm_data[1 + i]);
 699         clr_data = new wxXPMColourMapData;
 700
 701         if ( clr_def == NULL )
 702         {
 703             wxLogError(_("XPM: malformed colour definition '%s'!"), xpm_data[1+i]);
 704             clr_data->R = 255, clr_data->G = 0, clr_data->B = 255;
 705         }
 706         else
 707         {
 708             bool isNone;
 709             if ( !GetRGBFromName(clr_def, &isNone,
 710                                  &clr_data->R, &clr_data->G, &clr_data->B) )
 711             {
 712                 wxLogError(_("XPM: malformed colour definition '%s'!"), xpm_data[1+i]);
 713                 clr_data->R = 255, clr_data->G = 0, clr_data->B = 255;
 714             }
 715             else
 716             {
 717                 if ( isNone )
 718                 {
 719                     img.SetMask(TRUE);
 720                     img.SetMaskColour(255, 0, 255);
 721                     hasMask = TRUE;
 722                     clr_data->R = 255, clr_data->G = 0, clr_data->B = 255;
 723                 }
 724                 else
 725                 {
 726                     if ( hasMask && clr_data->R == 255 &&
 727                                     clr_data->G == 0 && clr_data->B == 255 )
 728                         clr_data->B = 254;
 729                 }
 730             }
 731         }
 732         clr_tbl.Put(key, clr_data);
 733     }
 734
 735     /*
 736      *  Parse image data:
 737      */
 738
 739     unsigned char *img_data = img.GetData();
 740     for (j = 0; j < height; j++)
 741     {
 742         for (i = 0; i < width; i++, img_data += 3)
 743         {
 744             for (i_key = 0; i_key < chars_per_pixel; i_key++)
 745                 key[i_key] = (wxChar)xpm_data[1 + colors_cnt + j]
 746                                              [chars_per_pixel * i + i_key];
 747             clr_data = (wxXPMColourMapData*) clr_tbl.Get(key);
 748             if ( clr_data == NULL )
 749             {
 750                 wxLogError(_("XPM: Malformed pixel data!"));
 751             }
 752             else
 753             {
 754                 img_data[0] = clr_data->R;
 755                 img_data[1] = clr_data->G;
 756                 img_data[2] = clr_data->B;
 757             }
 758         }
 759     }
 760
 761     return img;
 762 }
 763
 764 #endif // wxUSE_IMAGE && wxUSE_XPM