granicus.if.org Git - imagemagick/blob - coders/wpg.c

   1 /*
   2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
   3 %                                                                             %
   4 %                                                                             %
   5 %                            W   W  PPPP    GGGG                              %
   6 %                            W   W  P   P  G                                  %
   7 %                            W W W  PPPP   G GGG                              %
   8 %                            WW WW  P      G   G                              %
   9 %                            W   W  P       GGG                               %
  10 %                                                                             %
  11 %                                                                             %
  12 %                       Read WordPerfect Image Format                         %
  13 %                                                                             %
  14 %                              Software Design                                %
  15 %                              Jaroslav Fojtik                                %
  16 %                                 June 2000                                   %
  17 %                                                                             %
  18 %                                                                             %
  19 %  Copyright 1999-2012 ImageMagick Studio LLC, a non-profit organization      %
  20 %  dedicated to making software imaging solutions freely available.           %
  21 %                                                                             %
  22 %  You may not use this file except in compliance with the License.  You may  %
  23 %  obtain a copy of the License at                                            %
  24 %                                                                             %
  25 %    http://www.imagemagick.org/script/license.php                            %
  26 %                                                                             %
  27 %  Unless required by applicable law or agreed to in writing, software        %
  28 %  distributed under the License is distributed on an "AS IS" BASIS,          %
  29 %  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.   %
  30 %  See the License for the specific language governing permissions and        %
  31 %  limitations under the License.                                             %
  32 %                                                                             %
  33 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  34 %
  35 %
  36 */
  37 \f
  38 /*
  39   Include declarations.
  40 */
  41 #include "MagickCore/studio.h"
  42 #include "MagickCore/blob.h"
  43 #include "MagickCore/blob-private.h"
  44 #include "MagickCore/color-private.h"
  45 #include "MagickCore/colormap.h"
  46 #include "MagickCore/colormap-private.h"
  47 #include "MagickCore/constitute.h"
  48 #include "MagickCore/exception.h"
  49 #include "MagickCore/exception-private.h"
  50 #include "MagickCore/cache.h"
  51 #include "MagickCore/distort.h"
  52 #include "MagickCore/image.h"
  53 #include "MagickCore/image-private.h"
  54 #include "MagickCore/list.h"
  55 #include "MagickCore/magic.h"
  56 #include "MagickCore/magick.h"
  57 #include "MagickCore/memory_.h"
  58 #include "MagickCore/resource_.h"
  59 #include "MagickCore/pixel-accessor.h"
  60 #include "MagickCore/quantum-private.h"
  61 #include "MagickCore/static.h"
  62 #include "MagickCore/string_.h"
  63 #include "MagickCore/module.h"
  64 #include "MagickCore/transform.h"
  65 #include "MagickCore/utility.h"
  66 #include "MagickCore/utility-private.h"
  67 \f
  68 typedef struct
  69    {
  70    unsigned char Red;
  71    unsigned char Blue;
  72    unsigned char Green;
  73    } RGB_Record;
  74
  75 /* Default palette for WPG level 1 */
  76 const RGB_Record WPG1_Palette[256]={
  77 {  0,  0,  0},    {  0,  0,168},
  78 {  0,168,  0},    {  0,168,168},
  79 {168,  0,  0},    {168,  0,168},
  80 {168, 84,  0},    {168,168,168},
  81 { 84, 84, 84},    { 84, 84,252},
  82 { 84,252, 84},    { 84,252,252},
  83 {252, 84, 84},    {252, 84,252},
  84 {252,252, 84},    {252,252,252},  /*16*/
  85 {  0,  0,  0},    { 20, 20, 20},
  86 { 32, 32, 32},    { 44, 44, 44},
  87 { 56, 56, 56},    { 68, 68, 68},
  88 { 80, 80, 80},    { 96, 96, 96},
  89 {112,112,112},    {128,128,128},
  90 {144,144,144},    {160,160,160},
  91 {180,180,180},    {200,200,200},
  92 {224,224,224},    {252,252,252},  /*32*/
  93 {  0,  0,252},    { 64,  0,252},
  94 {124,  0,252},    {188,  0,252},
  95 {252,  0,252},    {252,  0,188},
  96 {252,  0,124},    {252,  0, 64},
  97 {252,  0,  0},    {252, 64,  0},
  98 {252,124,  0},    {252,188,  0},
  99 {252,252,  0},    {188,252,  0},
 100 {124,252,  0},    { 64,252,  0},  /*48*/
 101 {  0,252,  0},    {  0,252, 64},
 102 {  0,252,124},    {  0,252,188},
 103 {  0,252,252},    {  0,188,252},
 104 {  0,124,252},    {  0, 64,252},
 105 {124,124,252},    {156,124,252},
 106 {188,124,252},    {220,124,252},
 107 {252,124,252},    {252,124,220},
 108 {252,124,188},    {252,124,156},  /*64*/
 109 {252,124,124},    {252,156,124},
 110 {252,188,124},    {252,220,124},
 111 {252,252,124},    {220,252,124},
 112 {188,252,124},    {156,252,124},
 113 {124,252,124},    {124,252,156},
 114 {124,252,188},    {124,252,220},
 115 {124,252,252},    {124,220,252},
 116 {124,188,252},    {124,156,252},  /*80*/
 117 {180,180,252},    {196,180,252},
 118 {216,180,252},    {232,180,252},
 119 {252,180,252},    {252,180,232},
 120 {252,180,216},    {252,180,196},
 121 {252,180,180},    {252,196,180},
 122 {252,216,180},    {252,232,180},
 123 {252,252,180},    {232,252,180},
 124 {216,252,180},    {196,252,180},  /*96*/
 125 {180,220,180},    {180,252,196},
 126 {180,252,216},    {180,252,232},
 127 {180,252,252},    {180,232,252},
 128 {180,216,252},    {180,196,252},
 129 {0,0,112},    {28,0,112},
 130 {56,0,112},    {84,0,112},
 131 {112,0,112},    {112,0,84},
 132 {112,0,56},    {112,0,28},  /*112*/
 133 {112,0,0},    {112,28,0},
 134 {112,56,0},    {112,84,0},
 135 {112,112,0},    {84,112,0},
 136 {56,112,0},    {28,112,0},
 137 {0,112,0},    {0,112,28},
 138 {0,112,56},    {0,112,84},
 139 {0,112,112},    {0,84,112},
 140 {0,56,112},    {0,28,112},   /*128*/
 141 {56,56,112},    {68,56,112},
 142 {84,56,112},    {96,56,112},
 143 {112,56,112},    {112,56,96},
 144 {112,56,84},    {112,56,68},
 145 {112,56,56},    {112,68,56},
 146 {112,84,56},    {112,96,56},
 147 {112,112,56},    {96,112,56},
 148 {84,112,56},    {68,112,56},  /*144*/
 149 {56,112,56},    {56,112,69},
 150 {56,112,84},    {56,112,96},
 151 {56,112,112},    {56,96,112},
 152 {56,84,112},    {56,68,112},
 153 {80,80,112},    {88,80,112},
 154 {96,80,112},    {104,80,112},
 155 {112,80,112},    {112,80,104},
 156 {112,80,96},    {112,80,88},  /*160*/
 157 {112,80,80},    {112,88,80},
 158 {112,96,80},    {112,104,80},
 159 {112,112,80},    {104,112,80},
 160 {96,112,80},    {88,112,80},
 161 {80,112,80},    {80,112,88},
 162 {80,112,96},    {80,112,104},
 163 {80,112,112},    {80,114,112},
 164 {80,96,112},    {80,88,112},  /*176*/
 165 {0,0,64},    {16,0,64},
 166 {32,0,64},    {48,0,64},
 167 {64,0,64},    {64,0,48},
 168 {64,0,32},    {64,0,16},
 169 {64,0,0},    {64,16,0},
 170 {64,32,0},    {64,48,0},
 171 {64,64,0},    {48,64,0},
 172 {32,64,0},    {16,64,0},  /*192*/
 173 {0,64,0},    {0,64,16},
 174 {0,64,32},    {0,64,48},
 175 {0,64,64},    {0,48,64},
 176 {0,32,64},    {0,16,64},
 177 {32,32,64},    {40,32,64},
 178 {48,32,64},    {56,32,64},
 179 {64,32,64},    {64,32,56},
 180 {64,32,48},    {64,32,40},  /*208*/
 181 {64,32,32},    {64,40,32},
 182 {64,48,32},    {64,56,32},
 183 {64,64,32},    {56,64,32},
 184 {48,64,32},    {40,64,32},
 185 {32,64,32},    {32,64,40},
 186 {32,64,48},    {32,64,56},
 187 {32,64,64},    {32,56,64},
 188 {32,48,64},    {32,40,64},  /*224*/
 189 {44,44,64},    {48,44,64},
 190 {52,44,64},    {60,44,64},
 191 {64,44,64},    {64,44,60},
 192 {64,44,52},    {64,44,48},
 193 {64,44,44},    {64,48,44},
 194 {64,52,44},    {64,60,44},
 195 {64,64,44},    {60,64,44},
 196 {52,64,44},    {48,64,44},  /*240*/
 197 {44,64,44},    {44,64,48},
 198 {44,64,52},    {44,64,60},
 199 {44,64,64},    {44,60,64},
 200 {44,55,64},    {44,48,64},
 201 {0,0,0},    {0,0,0},
 202 {0,0,0},    {0,0,0},
 203 {0,0,0},    {0,0,0},
 204 {0,0,0},    {0,0,0}    /*256*/
 205 };
 206 \f
 207 /*
 208 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 209 %                                                                             %
 210 %                                                                             %
 211 %                                                                             %
 212 %   I s W P G                                                                 %
 213 %                                                                             %
 214 %                                                                             %
 215 %                                                                             %
 216 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 217 %
 218 %  IsWPG() returns True if the image format type, identified by the magick
 219 %  string, is WPG.
 220 %
 221 %  The format of the IsWPG method is:
 222 %
 223 %      unsigned int IsWPG(const unsigned char *magick,const size_t length)
 224 %
 225 %  A description of each parameter follows:
 226 %
 227 %    o status:  Method IsWPG returns True if the image format type is WPG.
 228 %
 229 %    o magick: compare image format pattern against these bytes.
 230 %
 231 %    o length: Specifies the length of the magick string.
 232 %
 233 */
 234 static unsigned int IsWPG(const unsigned char *magick,const size_t length)
 235 {
 236   if (length < 4)
 237     return(MagickFalse);
 238   if (memcmp(magick,"\377WPC",4) == 0)
 239     return(MagickTrue);
 240   return(MagickFalse);
 241 }
 242 \f
 243
 244 static void Rd_WP_DWORD(Image *image,size_t *d)
 245 {
 246   unsigned char
 247     b;
 248
 249   b=ReadBlobByte(image);
 250   *d=b;
 251   if (b < 0xFFU)
 252     return;
 253   b=ReadBlobByte(image);
 254   *d=(size_t) b;
 255   b=ReadBlobByte(image);
 256   *d+=(size_t) b*256l;
 257   if (*d < 0x8000)
 258     return;
 259   *d=(*d & 0x7FFF) << 16;
 260   b=ReadBlobByte(image);
 261   *d+=(size_t) b;
 262   b=ReadBlobByte(image);
 263   *d+=(size_t) b*256l;
 264   return;
 265 }
 266
 267 static void InsertRow(Image *image,unsigned char *p,ssize_t y,int bpp,
 268   ExceptionInfo *exception)
 269 {
 270   int
 271     bit;
 272
 273   Quantum
 274     index;
 275
 276   register Quantum
 277     *q;
 278
 279   ssize_t
 280     x;
 281
 282   switch (bpp)
 283     {
 284     case 1:  /* Convert bitmap scanline. */
 285       {
 286         q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
 287         if (q == (Quantum *) NULL)
 288           break;
 289         for (x=0; x < ((ssize_t) image->columns-7); x+=8)
 290         {
 291           for (bit=0; bit < 8; bit++)
 292           {
 293             index=((*p) & (0x80 >> bit) ? 0x01 : 0x00);
 294             SetPixelIndex(image,index,q);
 295             SetPixelInfoPixel(image,image->colormap+(ssize_t) index,q);
 296             q+=GetPixelChannels(image);
 297           }
 298           p++;
 299         }
 300         if ((image->columns % 8) != 0)
 301           {
 302             for (bit=0; bit < (ssize_t) (image->columns % 8); bit++)
 303             {
 304               index=((*p) & (0x80 >> bit) ? 0x01 : 0x00);
 305               SetPixelIndex(image,index,q);
 306               SetPixelInfoPixel(image,image->colormap+(ssize_t) index,q);
 307               q+=GetPixelChannels(image);
 308             }
 309             p++;
 310           }
 311         if (!SyncAuthenticPixels(image,exception))
 312           break;
 313         break;
 314       }
 315     case 2:  /* Convert PseudoColor scanline. */
 316       {
 317         q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
 318         if (q == (Quantum *) NULL)
 319           break;
 320         for (x=0; x < ((ssize_t) image->columns-1); x+=2)
 321         {
 322             index=ConstrainColormapIndex(image,(*p >> 6) & 0x3,exception);
 323             SetPixelIndex(image,index,q);
 324             SetPixelInfoPixel(image,image->colormap+(ssize_t) index,q);
 325             q+=GetPixelChannels(image);
 326             index=ConstrainColormapIndex(image,(*p >> 4) & 0x3,exception);
 327             SetPixelIndex(image,index,q);
 328             SetPixelInfoPixel(image,image->colormap+(ssize_t) index,q);
 329             q+=GetPixelChannels(image);
 330             index=ConstrainColormapIndex(image,(*p >> 2) & 0x3,exception);
 331             SetPixelIndex(image,index,q);
 332             SetPixelInfoPixel(image,image->colormap+(ssize_t) index,q);
 333             q+=GetPixelChannels(image);
 334             index=ConstrainColormapIndex(image,(*p) & 0x3,exception);
 335             SetPixelIndex(image,index,q);
 336             SetPixelInfoPixel(image,image->colormap+(ssize_t) index,q);
 337             p++;
 338             q+=GetPixelChannels(image);
 339         }
 340        if ((image->columns % 4) != 0)
 341           {
 342             index=ConstrainColormapIndex(image,(*p >> 6) & 0x3,exception);
 343             SetPixelIndex(image,index,q);
 344             SetPixelInfoPixel(image,image->colormap+(ssize_t) index,q);
 345             q+=GetPixelChannels(image);
 346             if ((image->columns % 4) >= 1)
 347
 348               {
 349                 index=ConstrainColormapIndex(image,(*p >> 4) & 0x3,exception);
 350                 SetPixelIndex(image,index,q);
 351                 SetPixelInfoPixel(image,image->colormap+(ssize_t) index,q);
 352                 q+=GetPixelChannels(image);
 353                 if ((image->columns % 4) >= 2)
 354
 355                   {
 356                     index=ConstrainColormapIndex(image,(*p >> 2) & 0x3,
 357                       exception);
 358                     SetPixelIndex(image,index,q);
 359                     SetPixelInfoPixel(image,image->colormap+(ssize_t) index,q);
 360                     q+=GetPixelChannels(image);
 361                   }
 362               }
 363             p++;
 364           }
 365         if (SyncAuthenticPixels(image,exception) == MagickFalse)
 366           break;
 367         break;
 368       }
 369
 370     case 4:  /* Convert PseudoColor scanline. */
 371       {
 372         q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
 373         if (q == (Quantum *) NULL)
 374           break;
 375         for (x=0; x < ((ssize_t) image->columns-1); x+=2)
 376           {
 377             index=ConstrainColormapIndex(image,(*p >> 4) & 0x0f,exception);
 378             SetPixelIndex(image,index,q);
 379             SetPixelInfoPixel(image,image->colormap+(ssize_t) index,q);
 380             q+=GetPixelChannels(image);
 381             index=ConstrainColormapIndex(image,(*p) & 0x0f,exception);
 382             SetPixelIndex(image,index,q);
 383             SetPixelInfoPixel(image,image->colormap+(ssize_t) index,q);
 384             p++;
 385             q+=GetPixelChannels(image);
 386           }
 387         if ((image->columns % 2) != 0)
 388           {
 389             index=ConstrainColormapIndex(image,(*p >> 4) & 0x0f,exception);
 390             SetPixelIndex(image,index,q);
 391             SetPixelInfoPixel(image,image->colormap+(ssize_t) index,q);
 392             p++;
 393             q+=GetPixelChannels(image);
 394           }
 395         if (SyncAuthenticPixels(image,exception) == MagickFalse)
 396           break;
 397         break;
 398       }
 399     case 8: /* Convert PseudoColor scanline. */
 400       {
 401         q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
 402         if (q == (Quantum *) NULL) break;
 403
 404         for (x=0; x < (ssize_t) image->columns; x++)
 405           {
 406             index=ConstrainColormapIndex(image,*p,exception);
 407             SetPixelIndex(image,index,q);
 408             SetPixelInfoPixel(image,image->colormap+(ssize_t) index,q);
 409             p++;
 410             q+=GetPixelChannels(image);
 411           }
 412         if (SyncAuthenticPixels(image,exception) == MagickFalse)
 413           break;
 414       }
 415       break;
 416
 417     case 24:     /*  Convert DirectColor scanline.  */
 418       q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
 419       if (q == (Quantum *) NULL)
 420         break;
 421       for (x=0; x < (ssize_t) image->columns; x++)
 422         {
 423           SetPixelRed(image,ScaleCharToQuantum(*p++),q);
 424           SetPixelGreen(image,ScaleCharToQuantum(*p++),q);
 425           SetPixelBlue(image,ScaleCharToQuantum(*p++),q);
 426           q+=GetPixelChannels(image);
 427         }
 428       if (!SyncAuthenticPixels(image,exception))
 429         break;
 430       break;
 431     }
 432 }
 433
 434
 435 /* Helper for WPG1 raster reader. */
 436 #define InsertByte(b) \
 437 { \
 438   BImgBuff[x]=b; \
 439   x++; \
 440   if((ssize_t) x>=ldblk) \
 441   { \
 442     InsertRow(image,BImgBuff,(ssize_t) y,bpp,exception); \
 443     x=0; \
 444     y++; \
 445     } \
 446 }
 447 /* WPG1 raster reader. */
 448 static int UnpackWPGRaster(Image *image,int bpp,ExceptionInfo *exception)
 449 {
 450   int
 451     x,
 452     y,
 453     i;
 454
 455   unsigned char
 456     bbuf,
 457     *BImgBuff,
 458     RunCount;
 459
 460   ssize_t
 461     ldblk;
 462
 463   x=0;
 464   y=0;
 465
 466   ldblk=(ssize_t) ((bpp*image->columns+7)/8);
 467   BImgBuff=(unsigned char *) AcquireQuantumMemory((size_t) ldblk,
 468     sizeof(*BImgBuff));
 469   if(BImgBuff==NULL) return(-2);
 470
 471   while(y<(ssize_t) image->rows)
 472     {
 473       bbuf=ReadBlobByte(image);
 474
 475       RunCount=bbuf & 0x7F;
 476       if(bbuf & 0x80)
 477         {
 478           if(RunCount)  /* repeat next byte runcount * */
 479             {
 480               bbuf=ReadBlobByte(image);
 481               for(i=0;i<(int) RunCount;i++) InsertByte(bbuf);
 482             }
 483           else {  /* read next byte as RunCount; repeat 0xFF runcount* */
 484             RunCount=ReadBlobByte(image);
 485             for(i=0;i<(int) RunCount;i++) InsertByte(0xFF);
 486           }
 487         }
 488       else {
 489         if(RunCount)   /* next runcount byte are readed directly */
 490           {
 491             for(i=0;i < (int) RunCount;i++)
 492               {
 493                 bbuf=ReadBlobByte(image);
 494                 InsertByte(bbuf);
 495               }
 496           }
 497         else {  /* repeat previous line runcount* */
 498           RunCount=ReadBlobByte(image);
 499           if(x) {    /* attempt to duplicate row from x position: */
 500             /* I do not know what to do here */
 501             BImgBuff=(unsigned char *) RelinquishMagickMemory(BImgBuff);
 502             return(-3);
 503           }
 504           for(i=0;i < (int) RunCount;i++)
 505             {
 506               x=0;
 507               y++;    /* Here I need to duplicate previous row RUNCOUNT* */
 508               if(y<2) continue;
 509               if(y>(ssize_t) image->rows)
 510                 {
 511                   BImgBuff=(unsigned char *) RelinquishMagickMemory(BImgBuff);
 512                   return(-4);
 513                 }
 514               InsertRow(image,BImgBuff,y-1,bpp,exception);
 515             }
 516         }
 517       }
 518     }
 519   BImgBuff=(unsigned char *) RelinquishMagickMemory(BImgBuff);
 520   return(0);
 521 }
 522
 523
 524 /* Helper for WPG2 reader. */
 525 #define InsertByte6(b) \
 526 { \
 527   if(XorMe)\
 528     BImgBuff[x] = (unsigned char)~b;\
 529   else\
 530     BImgBuff[x] = b;\
 531   x++; \
 532   if((ssize_t) x >= ldblk) \
 533   { \
 534     InsertRow(image,BImgBuff,(ssize_t) y,bpp,exception); \
 535     x=0; \
 536     y++; \
 537    } \
 538 }
 539 /* WPG2 raster reader. */
 540 static int UnpackWPG2Raster(Image *image,int bpp,ExceptionInfo *exception)
 541 {
 542   size_t
 543     x,
 544     y;
 545
 546   ssize_t
 547     ldblk;
 548
 549   int XorMe = 0;
 550
 551   unsigned int
 552     SampleSize=1;
 553
 554   unsigned char
 555     bbuf,
 556     *BImgBuff,
 557     RunCount,
 558     SampleBuffer[8];
 559
 560   unsigned int
 561     i;
 562
 563   x=0;
 564   y=0;
 565   ldblk=(ssize_t) ((bpp*image->columns+7)/8);
 566   BImgBuff=(unsigned char *) AcquireQuantumMemory((size_t) ldblk,
 567     sizeof(*BImgBuff));
 568   if(BImgBuff==NULL)
 569     return(-2);
 570
 571   while( y< image->rows)
 572     {
 573       bbuf=ReadBlobByte(image);
 574
 575       switch(bbuf)
 576         {
 577         case 0x7D:
 578           SampleSize=ReadBlobByte(image);  /* DSZ */
 579           if(SampleSize>8)
 580             return(-2);
 581           if(SampleSize<1)
 582             return(-2);
 583           break;
 584         case 0x7E:
 585           (void) FormatLocaleFile(stderr,
 586             "\nUnsupported WPG token XOR, please report!");
 587           XorMe=!XorMe;
 588           break;
 589         case 0x7F:
 590           RunCount=ReadBlobByte(image);   /* BLK */
 591           for(i=0; i < SampleSize*(RunCount+1); i++)
 592             {
 593               InsertByte6(0);
 594             }
 595           break;
 596         case 0xFD:
 597           RunCount=ReadBlobByte(image);   /* EXT */
 598           for(i=0; i<= RunCount;i++)
 599             for(bbuf=0; bbuf < SampleSize; bbuf++)
 600               InsertByte6(SampleBuffer[bbuf]);
 601           break;
 602         case 0xFE:
 603           RunCount=ReadBlobByte(image);  /* RST */
 604           if(x!=0)
 605             {
 606               (void) FormatLocaleFile(stderr,
 607                 "\nUnsupported WPG2 unaligned token RST x=%.20g, please report!\n"
 608                 ,(double) x);
 609               return(-3);
 610             }
 611           {
 612             /* duplicate the previous row RunCount x */
 613             for(i=0;i<=RunCount;i++)
 614               {
 615                 InsertRow(image,BImgBuff,(ssize_t) (image->rows >= y ? y : image->rows-1),
 616                           bpp,exception);
 617                 y++;
 618               }
 619           }
 620           break;
 621         case 0xFF:
 622           RunCount=ReadBlobByte(image);   /* WHT */
 623           for(i=0; i < SampleSize*(RunCount+1); i++)
 624             {
 625               InsertByte6(0xFF);
 626             }
 627           break;
 628         default:
 629           RunCount=bbuf & 0x7F;
 630
 631           if(bbuf & 0x80)     /* REP */
 632             {
 633               for(i=0; i < SampleSize; i++)
 634                 SampleBuffer[i]=ReadBlobByte(image);
 635               for(i=0;i<=RunCount;i++)
 636                 for(bbuf=0;bbuf<SampleSize;bbuf++)
 637                   InsertByte6(SampleBuffer[bbuf]);
 638             }
 639           else {      /* NRP */
 640             for(i=0; i< SampleSize*(RunCount+1);i++)
 641               {
 642                 bbuf=ReadBlobByte(image);
 643                 InsertByte6(bbuf);
 644               }
 645           }
 646         }
 647     }
 648   BImgBuff=(unsigned char *) RelinquishMagickMemory(BImgBuff);
 649   return(0);
 650 }
 651
 652
 653 typedef float tCTM[3][3];
 654
 655 static unsigned LoadWPG2Flags(Image *image,char Precision,float *Angle,tCTM *CTM)
 656 {
 657 const unsigned char TPR=1,TRN=2,SKW=4,SCL=8,ROT=0x10,OID=0x20,LCK=0x80;
 658 ssize_t x;
 659 unsigned DenX;
 660 unsigned Flags;
 661
 662  (void) memset(*CTM,0,sizeof(*CTM));     /*CTM.erase();CTM.resize(3,3);*/
 663  (*CTM)[0][0]=1;
 664  (*CTM)[1][1]=1;
 665  (*CTM)[2][2]=1;
 666
 667  Flags=ReadBlobLSBShort(image);
 668  if(Flags & LCK) x=ReadBlobLSBLong(image);  /*Edit lock*/
 669  if(Flags & OID)
 670   {
 671   if(Precision==0)
 672     {x=ReadBlobLSBShort(image);}  /*ObjectID*/
 673   else
 674     {x=ReadBlobLSBLong(image);}  /*ObjectID (Double precision)*/
 675   }
 676  if(Flags & ROT)
 677   {
 678   x=ReadBlobLSBLong(image);  /*Rot Angle*/
 679   if(Angle) *Angle=x/65536.0;
 680   }
 681  if(Flags & (ROT|SCL))
 682   {
 683   x=ReadBlobLSBLong(image);  /*Sx*cos()*/
 684   (*CTM)[0][0] = (float)x/0x10000;
 685   x=ReadBlobLSBLong(image);  /*Sy*cos()*/
 686   (*CTM)[1][1] = (float)x/0x10000;
 687   }
 688  if(Flags & (ROT|SKW))
 689   {
 690   x=ReadBlobLSBLong(image);       /*Kx*sin()*/
 691   (*CTM)[1][0] = (float)x/0x10000;
 692   x=ReadBlobLSBLong(image);       /*Ky*sin()*/
 693   (*CTM)[0][1] = (float)x/0x10000;
 694   }
 695  if(Flags & TRN)
 696   {
 697   x=ReadBlobLSBLong(image); DenX=ReadBlobLSBShort(image);  /*Tx*/
 698         if(x>=0) (*CTM)[0][2] = (float)x+(float)DenX/0x10000;
 699             else (*CTM)[0][2] = (float)x-(float)DenX/0x10000;
 700   x=ReadBlobLSBLong(image); DenX=ReadBlobLSBShort(image);  /*Ty*/
 701   (*CTM)[1][2]=(float)x + ((x>=0)?1:-1)*(float)DenX/0x10000;
 702         if(x>=0) (*CTM)[1][2] = (float)x+(float)DenX/0x10000;
 703             else (*CTM)[1][2] = (float)x-(float)DenX/0x10000;
 704   }
 705  if(Flags & TPR)
 706   {
 707   x=ReadBlobLSBShort(image); DenX=ReadBlobLSBShort(image);  /*Px*/
 708   (*CTM)[2][0] = x + (float)DenX/0x10000;;
 709   x=ReadBlobLSBShort(image);  DenX=ReadBlobLSBShort(image); /*Py*/
 710   (*CTM)[2][1] = x + (float)DenX/0x10000;
 711   }
 712  return(Flags);
 713 }
 714
 715
 716 static Image *ExtractPostscript(Image *image,const ImageInfo *image_info,
 717   MagickOffsetType PS_Offset,ssize_t PS_Size,ExceptionInfo *exception)
 718 {
 719   char
 720     postscript_file[MaxTextExtent];
 721
 722   const MagicInfo
 723     *magic_info;
 724
 725   FILE
 726     *ps_file;
 727
 728   ImageInfo
 729     *clone_info;
 730
 731   Image
 732     *image2;
 733
 734   unsigned char
 735     magick[2*MaxTextExtent];
 736
 737
 738   if ((clone_info=CloneImageInfo(image_info)) == NULL)
 739     return(image);
 740   clone_info->blob=(void *) NULL;
 741   clone_info->length=0;
 742
 743   /* Obtain temporary file */
 744   AcquireUniqueFilename(postscript_file);
 745   ps_file=fopen_utf8(postscript_file,"wb");
 746   if (ps_file == (FILE *) NULL)
 747     goto FINISH;
 748
 749   /* Copy postscript to temporary file */
 750   (void) SeekBlob(image,PS_Offset,SEEK_SET);
 751   (void) ReadBlob(image, 2*MaxTextExtent, magick);
 752
 753   (void) SeekBlob(image,PS_Offset,SEEK_SET);
 754   while(PS_Size-- > 0)
 755     {
 756       (void) fputc(ReadBlobByte(image),ps_file);
 757     }
 758   (void) fclose(ps_file);
 759
 760     /* Detect file format - Check magic.mgk configuration file. */
 761   magic_info=GetMagicInfo(magick,2*MaxTextExtent,exception);
 762   if(magic_info == (const MagicInfo *) NULL) goto FINISH_UNL;
 763   /*     printf("Detected:%s  \n",magic_info->name); */
 764   if(exception->severity != UndefinedException) goto FINISH_UNL;
 765   if(magic_info->name == (char *) NULL) goto FINISH_UNL;
 766
 767   (void) CopyMagickMemory(clone_info->magick,magic_info->name,MaxTextExtent);
 768
 769     /* Read nested image */
 770   /*FormatString(clone_info->filename,"%s:%s",magic_info->name,postscript_file);*/
 771   FormatLocaleString(clone_info->filename,MaxTextExtent,"%s",postscript_file);
 772   image2=ReadImage(clone_info,exception);
 773
 774   if (!image2)
 775     goto FINISH_UNL;
 776
 777   /*
 778     Replace current image with new image while copying base image
 779     attributes.
 780   */
 781   (void) CopyMagickMemory(image2->filename,image->filename,MaxTextExtent);
 782   (void) CopyMagickMemory(image2->magick_filename,image->magick_filename,MaxTextExtent);
 783   (void) CopyMagickMemory(image2->magick,image->magick,MaxTextExtent);
 784   image2->depth=image->depth;
 785   DestroyBlob(image2);
 786   image2->blob=ReferenceBlob(image->blob);
 787
 788   if ((image->rows == 0) || (image->columns == 0))
 789     DeleteImageFromList(&image);
 790
 791   AppendImageToList(&image,image2);
 792
 793  FINISH_UNL:
 794   (void) RelinquishUniqueFileResource(postscript_file);
 795  FINISH:
 796   DestroyImageInfo(clone_info);
 797   return(image);
 798 }
 799 \f
 800 /*
 801 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 802 %                                                                             %
 803 %                                                                             %
 804 %                                                                             %
 805 %   R e a d W P G I m a g e                                                   %
 806 %                                                                             %
 807 %                                                                             %
 808 %                                                                             %
 809 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 810 %
 811 %  Method ReadWPGImage reads an WPG X image file and returns it.  It
 812 %  allocates the memory necessary for the new Image structure and returns a
 813 %  pointer to the new image.
 814 %
 815 %  The format of the ReadWPGImage method is:
 816 %
 817 %    Image *ReadWPGImage(const ImageInfo *image_info,ExceptionInfo *exception)
 818 %
 819 %  A description of each parameter follows:
 820 %
 821 %    o image:  Method ReadWPGImage returns a pointer to the image after
 822 %      reading. A null image is returned if there is a memory shortage or if
 823 %      the image cannot be read.
 824 %
 825 %    o image_info: Specifies a pointer to a ImageInfo structure.
 826 %
 827 %    o exception: return any errors or warnings in this structure.
 828 %
 829 */
 830 static Image *ReadWPGImage(const ImageInfo *image_info,
 831   ExceptionInfo *exception)
 832 {
 833   typedef struct
 834   {
 835     size_t FileId;
 836     MagickOffsetType DataOffset;
 837     unsigned int ProductType;
 838     unsigned int FileType;
 839     unsigned char MajorVersion;
 840     unsigned char MinorVersion;
 841     unsigned int EncryptKey;
 842     unsigned int Reserved;
 843   } WPGHeader;
 844
 845   typedef struct
 846   {
 847     unsigned char RecType;
 848     size_t RecordLength;
 849   } WPGRecord;
 850
 851   typedef struct
 852   {
 853     unsigned char Class;
 854     unsigned char RecType;
 855     size_t Extension;
 856     size_t RecordLength;
 857   } WPG2Record;
 858
 859   typedef struct
 860   {
 861     unsigned  HorizontalUnits;
 862     unsigned  VerticalUnits;
 863     unsigned char PosSizePrecision;
 864   } WPG2Start;
 865
 866   typedef struct
 867   {
 868     unsigned int Width;
 869     unsigned int Heigth;
 870     unsigned int Depth;
 871     unsigned int HorzRes;
 872     unsigned int VertRes;
 873   } WPGBitmapType1;
 874
 875   typedef struct
 876   {
 877     unsigned int Width;
 878     unsigned int Heigth;
 879     unsigned char Depth;
 880     unsigned char Compression;
 881   } WPG2BitmapType1;
 882
 883   typedef struct
 884   {
 885     unsigned int RotAngle;
 886     unsigned int LowLeftX;
 887     unsigned int LowLeftY;
 888     unsigned int UpRightX;
 889     unsigned int UpRightY;
 890     unsigned int Width;
 891     unsigned int Heigth;
 892     unsigned int Depth;
 893     unsigned int HorzRes;
 894     unsigned int VertRes;
 895   } WPGBitmapType2;
 896
 897   typedef struct
 898   {
 899     unsigned int StartIndex;
 900     unsigned int NumOfEntries;
 901   } WPGColorMapRec;
 902
 903   typedef struct {
 904     size_t PS_unknown1;
 905     unsigned int PS_unknown2;
 906     unsigned int PS_unknown3;
 907   } WPGPSl1Record;
 908
 909   Image
 910     *image,
 911     *rotated_image;
 912
 913   unsigned int
 914     status;
 915
 916   WPGHeader
 917     Header;
 918
 919   WPGRecord
 920     Rec;
 921
 922   WPG2Record
 923     Rec2;
 924
 925   WPG2Start StartWPG;
 926
 927   WPGBitmapType1
 928     BitmapHeader1;
 929
 930   WPG2BitmapType1
 931     Bitmap2Header1;
 932
 933   WPGBitmapType2
 934     BitmapHeader2;
 935
 936   WPGColorMapRec
 937     WPG_Palette;
 938
 939   int
 940     i,
 941     bpp,
 942     WPG2Flags;
 943
 944   ssize_t
 945     ldblk;
 946
 947   size_t
 948     one;
 949
 950   unsigned char
 951     *BImgBuff;
 952
 953   tCTM CTM;         /*current transform matrix*/
 954
 955   /*
 956     Open image file.
 957   */
 958   assert(image_info != (const ImageInfo *) NULL);
 959   assert(image_info->signature == MagickSignature);
 960   assert(exception != (ExceptionInfo *) NULL);
 961   assert(exception->signature == MagickSignature);
 962   one=1;
 963   image=AcquireImage(image_info,exception);
 964   image->depth=8;
 965   status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
 966   if (status == MagickFalse)
 967     {
 968       image=DestroyImageList(image);
 969       return((Image *) NULL);
 970     }
 971   /*
 972     Read WPG image.
 973   */
 974   Header.FileId=ReadBlobLSBLong(image);
 975   Header.DataOffset=(MagickOffsetType) ReadBlobLSBLong(image);
 976   Header.ProductType=ReadBlobLSBShort(image);
 977   Header.FileType=ReadBlobLSBShort(image);
 978   Header.MajorVersion=ReadBlobByte(image);
 979   Header.MinorVersion=ReadBlobByte(image);
 980   Header.EncryptKey=ReadBlobLSBShort(image);
 981   Header.Reserved=ReadBlobLSBShort(image);
 982
 983   if (Header.FileId!=0x435057FF || (Header.ProductType>>8)!=0x16)
 984     ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 985   if (Header.EncryptKey!=0)
 986     ThrowReaderException(CoderError,"EncryptedWPGImageFileNotSupported");
 987
 988   image->columns = 1;
 989   image->rows = 1;
 990   image->colors = 0;
 991   bpp=0;
 992   BitmapHeader2.RotAngle=0;
 993
 994   switch(Header.FileType)
 995     {
 996     case 1:     /* WPG level 1 */
 997       while(!EOFBlob(image)) /* object parser loop */
 998         {
 999           (void) SeekBlob(image,Header.DataOffset,SEEK_SET);
1000           if(EOFBlob(image))
1001             break;
1002
1003           Rec.RecType=(i=ReadBlobByte(image));
1004           if(i==EOF)
1005             break;
1006           Rd_WP_DWORD(image,&Rec.RecordLength);
1007           if(EOFBlob(image))
1008             break;
1009
1010           Header.DataOffset=TellBlob(image)+Rec.RecordLength;
1011
1012           switch(Rec.RecType)
1013             {
1014             case 0x0B: /* bitmap type 1 */
1015               BitmapHeader1.Width=ReadBlobLSBShort(image);
1016               BitmapHeader1.Heigth=ReadBlobLSBShort(image);
1017               BitmapHeader1.Depth=ReadBlobLSBShort(image);
1018               BitmapHeader1.HorzRes=ReadBlobLSBShort(image);
1019               BitmapHeader1.VertRes=ReadBlobLSBShort(image);
1020
1021               if(BitmapHeader1.HorzRes && BitmapHeader1.VertRes)
1022                 {
1023                   image->units=PixelsPerCentimeterResolution;
1024                   image->resolution.x=BitmapHeader1.HorzRes/470.0;
1025                   image->resolution.y=BitmapHeader1.VertRes/470.0;
1026                 }
1027               image->columns=BitmapHeader1.Width;
1028               image->rows=BitmapHeader1.Heigth;
1029               bpp=BitmapHeader1.Depth;
1030
1031               goto UnpackRaster;
1032
1033             case 0x0E:  /*Color palette */
1034               WPG_Palette.StartIndex=ReadBlobLSBShort(image);
1035               WPG_Palette.NumOfEntries=ReadBlobLSBShort(image);
1036
1037               image->colors=WPG_Palette.NumOfEntries;
1038               if (!AcquireImageColormap(image,image->colors,exception))
1039                 goto NoMemory;
1040               for (i=WPG_Palette.StartIndex;
1041                    i < (int)WPG_Palette.NumOfEntries; i++)
1042                 {
1043                   image->colormap[i].red=ScaleCharToQuantum((unsigned char)
1044                     ReadBlobByte(image));
1045                   image->colormap[i].green=ScaleCharToQuantum((unsigned char)
1046                     ReadBlobByte(image));
1047                   image->colormap[i].blue=ScaleCharToQuantum((unsigned char)
1048                     ReadBlobByte(image));
1049                 }
1050               break;
1051
1052             case 0x11:  /* Start PS l1 */
1053               if(Rec.RecordLength > 8)
1054                 image=ExtractPostscript(image,image_info,
1055                   TellBlob(image)+8,   /* skip PS header in the wpg */
1056                   (ssize_t) Rec.RecordLength-8,exception);
1057               break;
1058
1059             case 0x14:  /* bitmap type 2 */
1060               BitmapHeader2.RotAngle=ReadBlobLSBShort(image);
1061               BitmapHeader2.LowLeftX=ReadBlobLSBShort(image);
1062               BitmapHeader2.LowLeftY=ReadBlobLSBShort(image);
1063               BitmapHeader2.UpRightX=ReadBlobLSBShort(image);
1064               BitmapHeader2.UpRightY=ReadBlobLSBShort(image);
1065               BitmapHeader2.Width=ReadBlobLSBShort(image);
1066               BitmapHeader2.Heigth=ReadBlobLSBShort(image);
1067               BitmapHeader2.Depth=ReadBlobLSBShort(image);
1068               BitmapHeader2.HorzRes=ReadBlobLSBShort(image);
1069               BitmapHeader2.VertRes=ReadBlobLSBShort(image);
1070
1071               image->units=PixelsPerCentimeterResolution;
1072               image->page.width=(unsigned int)
1073                 ((BitmapHeader2.LowLeftX-BitmapHeader2.UpRightX)/470.0);
1074               image->page.height=(unsigned int)
1075                 ((BitmapHeader2.LowLeftX-BitmapHeader2.UpRightY)/470.0);
1076               image->page.x=(int) (BitmapHeader2.LowLeftX/470.0);
1077               image->page.y=(int) (BitmapHeader2.LowLeftX/470.0);
1078               if(BitmapHeader2.HorzRes && BitmapHeader2.VertRes)
1079                 {
1080                   image->resolution.x=BitmapHeader2.HorzRes/470.0;
1081                   image->resolution.y=BitmapHeader2.VertRes/470.0;
1082                 }
1083               image->columns=BitmapHeader2.Width;
1084               image->rows=BitmapHeader2.Heigth;
1085               bpp=BitmapHeader2.Depth;
1086
1087             UnpackRaster:
1088               if ((image->colors == 0) && (bpp != 24))
1089                 {
1090                   image->colors=one << bpp;
1091                   if (!AcquireImageColormap(image,image->colors,exception))
1092                     {
1093                     NoMemory:
1094                       ThrowReaderException(ResourceLimitError,
1095                         "MemoryAllocationFailed");
1096                     }
1097                   /* printf("Load default colormap \n"); */
1098                   for (i=0; (i < (int) image->colors) && (i < 256); i++)
1099                     {
1100                       image->colormap[i].red=ScaleCharToQuantum(WPG1_Palette[i].Red);
1101                       image->colormap[i].green=ScaleCharToQuantum(WPG1_Palette[i].Green);
1102                       image->colormap[i].blue=ScaleCharToQuantum(WPG1_Palette[i].Blue);
1103                     }
1104                 }
1105               else
1106                 {
1107                   if (bpp < 24)
1108                     if ( (image->colors < (one << bpp)) && (bpp != 24) )
1109                       image->colormap=(PixelInfo *) ResizeQuantumMemory(
1110                         image->colormap,(size_t) (one << bpp),
1111                         sizeof(*image->colormap));
1112                 }
1113
1114               if (bpp == 1)
1115                 {
1116                   if(image->colormap[0].red==0 &&
1117                      image->colormap[0].green==0 &&
1118                      image->colormap[0].blue==0 &&
1119                      image->colormap[1].red==0 &&
1120                      image->colormap[1].green==0 &&
1121                      image->colormap[1].blue==0)
1122                     {  /* fix crippled monochrome palette */
1123                       image->colormap[1].red =
1124                         image->colormap[1].green =
1125                         image->colormap[1].blue = QuantumRange;
1126                     }
1127                 }
1128
1129               if(UnpackWPGRaster(image,bpp,exception) < 0)
1130                 /* The raster cannot be unpacked */
1131                 {
1132                 DecompressionFailed:
1133                   ThrowReaderException(CoderError,"UnableToDecompressImage");
1134                     }
1135
1136               if(Rec.RecType==0x14 && BitmapHeader2.RotAngle!=0 && !image_info->ping)
1137                 {
1138                   /* flop command */
1139                   if(BitmapHeader2.RotAngle & 0x8000)
1140                     {
1141                       rotated_image = FlopImage(image, exception);
1142                       rotated_image->blob = image->blob;
1143                       DuplicateBlob(rotated_image,image);
1144                       (void) RemoveLastImageFromList(&image);
1145                       AppendImageToList(&image,rotated_image);
1146                     }
1147                   /* flip command */
1148                   if(BitmapHeader2.RotAngle & 0x2000)
1149                     {
1150                       rotated_image = FlipImage(image, exception);
1151                       rotated_image->blob = image->blob;
1152                       DuplicateBlob(rotated_image,image);
1153                       (void) RemoveLastImageFromList(&image);
1154                       AppendImageToList(&image,rotated_image);
1155                     }
1156
1157       /* rotate command */
1158                   if(BitmapHeader2.RotAngle & 0x0FFF)
1159                     {
1160                       rotated_image = RotateImage(image, (BitmapHeader2.RotAngle & 0x0FFF), exception);
1161                       rotated_image->blob = image->blob;
1162                       DuplicateBlob(rotated_image,image);
1163                       (void) RemoveLastImageFromList(&image);
1164                       AppendImageToList(&image,rotated_image);
1165                     }
1166                 }
1167
1168               /* Allocate next image structure. */
1169               AcquireNextImage(image_info,image,exception);
1170               image->depth=8;
1171               if (image->next == (Image *) NULL)
1172                 goto Finish;
1173               image=SyncNextImageInList(image);
1174               image->columns=image->rows=0;
1175               image->colors=0;
1176               break;
1177
1178             case 0x1B:  /* Postscript l2 */
1179               if(Rec.RecordLength>0x3C)
1180                 image=ExtractPostscript(image,image_info,
1181                   TellBlob(image)+0x3C,   /* skip PS l2 header in the wpg */
1182                   (ssize_t) Rec.RecordLength-0x3C,exception);
1183               break;
1184             }
1185         }
1186       break;
1187
1188     case 2:  /* WPG level 2 */
1189       (void) memset(CTM,0,sizeof(CTM));
1190       StartWPG.PosSizePrecision = 0;
1191       while(!EOFBlob(image)) /* object parser loop */
1192         {
1193           (void) SeekBlob(image,Header.DataOffset,SEEK_SET);
1194           if(EOFBlob(image))
1195             break;
1196
1197           Rec2.Class=(i=ReadBlobByte(image));
1198           if(i==EOF)
1199             break;
1200           Rec2.RecType=(i=ReadBlobByte(image));
1201           if(i==EOF)
1202             break;
1203           Rd_WP_DWORD(image,&Rec2.Extension);
1204           Rd_WP_DWORD(image,&Rec2.RecordLength);
1205           if(EOFBlob(image))
1206             break;
1207
1208           Header.DataOffset=TellBlob(image)+Rec2.RecordLength;
1209
1210           switch(Rec2.RecType)
1211             {
1212       case 1:
1213               StartWPG.HorizontalUnits=ReadBlobLSBShort(image);
1214               StartWPG.VerticalUnits=ReadBlobLSBShort(image);
1215               StartWPG.PosSizePrecision=ReadBlobByte(image);
1216               break;
1217             case 0x0C:    /* Color palette */
1218               WPG_Palette.StartIndex=ReadBlobLSBShort(image);
1219               WPG_Palette.NumOfEntries=ReadBlobLSBShort(image);
1220
1221               image->colors=WPG_Palette.NumOfEntries;
1222               if (AcquireImageColormap(image,image->colors,exception) == MagickFalse)
1223                 ThrowReaderException(ResourceLimitError,
1224                   "MemoryAllocationFailed");
1225               for (i=WPG_Palette.StartIndex;
1226                    i < (int)WPG_Palette.NumOfEntries; i++)
1227                 {
1228                   image->colormap[i].red=ScaleCharToQuantum((char)
1229                     ReadBlobByte(image));
1230                   image->colormap[i].green=ScaleCharToQuantum((char)
1231                     ReadBlobByte(image));
1232                   image->colormap[i].blue=ScaleCharToQuantum((char)
1233                     ReadBlobByte(image));
1234                   (void) ReadBlobByte(image);   /*Opacity??*/
1235                 }
1236               break;
1237             case 0x0E:
1238               Bitmap2Header1.Width=ReadBlobLSBShort(image);
1239               Bitmap2Header1.Heigth=ReadBlobLSBShort(image);
1240               Bitmap2Header1.Depth=ReadBlobByte(image);
1241               Bitmap2Header1.Compression=ReadBlobByte(image);
1242
1243               if(Bitmap2Header1.Compression > 1)
1244                 continue; /*Unknown compression method */
1245               switch(Bitmap2Header1.Depth)
1246                 {
1247                 case 1:
1248                   bpp=1;
1249                   break;
1250                 case 2:
1251                   bpp=2;
1252                   break;
1253                 case 3:
1254                   bpp=4;
1255                   break;
1256                 case 4:
1257                   bpp=8;
1258                   break;
1259                 case 8:
1260                   bpp=24;
1261                   break;
1262                 default:
1263                   continue;  /*Ignore raster with unknown depth*/
1264                 }
1265               image->columns=Bitmap2Header1.Width;
1266               image->rows=Bitmap2Header1.Heigth;
1267
1268               if ((image->colors == 0) && (bpp != 24))
1269                 {
1270                   size_t
1271                     one;
1272
1273                   one=1;
1274                   image->colors=one << bpp;
1275                   if (!AcquireImageColormap(image,image->colors,exception))
1276                     goto NoMemory;
1277                 }
1278               else
1279                 {
1280                   if(bpp < 24)
1281                     if( image->colors<(one << bpp) && bpp!=24 )
1282                       image->colormap=(PixelInfo *) ResizeQuantumMemory(
1283                        image->colormap,(size_t) (one << bpp),
1284                        sizeof(*image->colormap));
1285                 }
1286
1287
1288               switch(Bitmap2Header1.Compression)
1289                 {
1290                 case 0:    /*Uncompressed raster*/
1291                   {
1292                     ldblk=(ssize_t) ((bpp*image->columns+7)/8);
1293                     BImgBuff=(unsigned char *) AcquireQuantumMemory((size_t)
1294                       ldblk,sizeof(*BImgBuff));
1295                     if (BImgBuff == (unsigned char *) NULL)
1296                       goto NoMemory;
1297
1298                     for(i=0; i< (ssize_t) image->rows; i++)
1299                       {
1300                         (void) ReadBlob(image,ldblk,BImgBuff);
1301                         InsertRow(image,BImgBuff,i,bpp,exception);
1302                       }
1303
1304                     if(BImgBuff)
1305                       BImgBuff=(unsigned char *) RelinquishMagickMemory(BImgBuff);;
1306                     break;
1307                   }
1308                 case 1:    /*RLE for WPG2 */
1309                   {
1310                     if( UnpackWPG2Raster(image,bpp,exception) < 0)
1311                       goto DecompressionFailed;
1312                     break;
1313                   }
1314                 }
1315
1316               if(CTM[0][0]<0 && !image_info->ping)
1317     {    /*?? RotAngle=360-RotAngle;*/
1318       rotated_image = FlopImage(image, exception);
1319       rotated_image->blob = image->blob;
1320       DuplicateBlob(rotated_image,image);
1321       (void) RemoveLastImageFromList(&image);
1322       AppendImageToList(&image,rotated_image);
1323                   /* Try to change CTM according to Flip - I am not sure, must be checked.
1324                      Tx(0,0)=-1;      Tx(1,0)=0;   Tx(2,0)=0;
1325                      Tx(0,1)= 0;      Tx(1,1)=1;   Tx(2,1)=0;
1326                      Tx(0,2)=(WPG._2Rect.X_ur+WPG._2Rect.X_ll);
1327                      Tx(1,2)=0;   Tx(2,2)=1; */
1328                 }
1329               if(CTM[1][1]<0 && !image_info->ping)
1330     {    /*?? RotAngle=360-RotAngle;*/
1331       rotated_image = FlipImage(image, exception);
1332       rotated_image->blob = image->blob;
1333       DuplicateBlob(rotated_image,image);
1334       (void) RemoveLastImageFromList(&image);
1335       AppendImageToList(&image,rotated_image);
1336                   /* Try to change CTM according to Flip - I am not sure, must be checked.
1337                      float_matrix Tx(3,3);
1338                      Tx(0,0)= 1;   Tx(1,0)= 0;   Tx(2,0)=0;
1339                      Tx(0,1)= 0;   Tx(1,1)=-1;   Tx(2,1)=0;
1340                      Tx(0,2)= 0;   Tx(1,2)=(WPG._2Rect.Y_ur+WPG._2Rect.Y_ll);
1341                      Tx(2,2)=1; */
1342     }
1343
1344
1345               /* Allocate next image structure. */
1346               AcquireNextImage(image_info,image,exception);
1347               image->depth=8;
1348               if (image->next == (Image *) NULL)
1349                 goto Finish;
1350               image=SyncNextImageInList(image);
1351               image->columns=image->rows=1;
1352               image->colors=0;
1353               break;
1354
1355             case 0x12:  /* Postscript WPG2*/
1356         i=ReadBlobLSBShort(image);
1357               if(Rec2.RecordLength > (unsigned int) i)
1358                 image=ExtractPostscript(image,image_info,
1359                   TellBlob(image)+i,    /*skip PS header in the wpg2*/
1360                   (ssize_t) (Rec2.RecordLength-i-2),exception);
1361               break;
1362
1363       case 0x1B:          /*bitmap rectangle*/
1364               WPG2Flags = LoadWPG2Flags(image,StartWPG.PosSizePrecision,NULL,&CTM);
1365               (void) WPG2Flags;
1366               break;
1367             }
1368         }
1369
1370       break;
1371
1372     default:
1373       {
1374          ThrowReaderException(CoderError,"DataEncodingSchemeIsNotSupported");
1375       }
1376    }
1377
1378  Finish:
1379   (void) CloseBlob(image);
1380
1381   {
1382     Image
1383       *p;
1384
1385     ssize_t
1386       scene=0;
1387
1388     /*
1389       Rewind list, removing any empty images while rewinding.
1390     */
1391     p=image;
1392     image=NULL;
1393     while (p != (Image *) NULL)
1394       {
1395         Image *tmp=p;
1396         if ((p->rows == 0) || (p->columns == 0)) {
1397           p=p->previous;
1398           DeleteImageFromList(&tmp);
1399         } else {
1400           image=p;
1401           p=p->previous;
1402         }
1403       }
1404     /*
1405       Fix scene numbers.
1406     */
1407     for (p=image; p != (Image *) NULL; p=p->next)
1408       p->scene=(size_t) scene++;
1409   }
1410   if (image == (Image *) NULL)
1411     ThrowReaderException(CorruptImageError,
1412       "ImageFileDoesNotContainAnyImageData");
1413   return(image);
1414 }
1415 \f
1416 /*
1417 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1418 %                                                                             %
1419 %                                                                             %
1420 %                                                                             %
1421 %   R e g i s t e r W P G I m a g e                                           %
1422 %                                                                             %
1423 %                                                                             %
1424 %                                                                             %
1425 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1426 %
1427 %  Method RegisterWPGImage adds attributes for the WPG image format to
1428 %  the list of supported formats.  The attributes include the image format
1429 %  tag, a method to read and/or write the format, whether the format
1430 %  supports the saving of more than one frame to the same file or blob,
1431 %  whether the format supports native in-memory I/O, and a brief
1432 %  description of the format.
1433 %
1434 %  The format of the RegisterWPGImage method is:
1435 %
1436 %      size_t RegisterWPGImage(void)
1437 %
1438 */
1439 ModuleExport size_t RegisterWPGImage(void)
1440 {
1441   MagickInfo
1442     *entry;
1443
1444   entry=SetMagickInfo("WPG");
1445   entry->decoder=(DecodeImageHandler *) ReadWPGImage;
1446   entry->magick=(IsImageFormatHandler *) IsWPG;
1447   entry->description=AcquireString("Word Perfect Graphics");
1448   entry->module=ConstantString("WPG");
1449   entry->seekable_stream=MagickTrue;
1450   (void) RegisterMagickInfo(entry);
1451   return(MagickImageCoderSignature);
1452 }
1453 \f
1454 /*
1455 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1456 %                                                                             %
1457 %                                                                             %
1458 %                                                                             %
1459 %   U n r e g i s t e r W P G I m a g e                                       %
1460 %                                                                             %
1461 %                                                                             %
1462 %                                                                             %
1463 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1464 %
1465 %  Method UnregisterWPGImage removes format registrations made by the
1466 %  WPG module from the list of supported formats.
1467 %
1468 %  The format of the UnregisterWPGImage method is:
1469 %
1470 %      UnregisterWPGImage(void)
1471 %
1472 */
1473 ModuleExport void UnregisterWPGImage(void)
1474 {
1475   (void) UnregisterMagickInfo("WPG");
1476 }