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

   1 /*
   2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
   3 %                                                                             %
   4 %                                                                             %
   5 %                                                                             %
   6 %                        JJJJJ  BBBB   IIIII   GGGG                           %
   7 %                          J    B   B    I    G                               %
   8 %                          J    BBBB     I    G  GG                           %
   9 %                        J J    B   B    I    G   G                           %
  10 %                        JJJ    BBBB   IIIII   GGG                            %
  11 %                                                                             %
  12 %                                                                             %
  13 %                       Read/Write JBIG Image Format                          %
  14 %                                                                             %
  15 %                              Software Design                                %
  16 %                                John Cristy                                  %
  17 %                                 July 1992                                   %
  18 %                                                                             %
  19 %                                                                             %
  20 %  Copyright 1999-2010 ImageMagick Studio LLC, a non-profit organization      %
  21 %  dedicated to making software imaging solutions freely available.           %
  22 %                                                                             %
  23 %  You may not use this file except in compliance with the License.  You may  %
  24 %  obtain a copy of the License at                                            %
  25 %                                                                             %
  26 %    http://www.imagemagick.org/script/license.php                            %
  27 %                                                                             %
  28 %  Unless required by applicable law or agreed to in writing, software        %
  29 %  distributed under the License is distributed on an "AS IS" BASIS,          %
  30 %  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.   %
  31 %  See the License for the specific language governing permissions and        %
  32 %  limitations under the License.                                             %
  33 %                                                                             %
  34 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  35 %
  36 %
  37 */
  38 \f
  39 /*
  40   Include declarations.
  41 */
  42 #include "magick/studio.h"
  43 #include "magick/blob.h"
  44 #include "magick/blob-private.h"
  45 #include "magick/cache.h"
  46 #include "magick/color-private.h"
  47 #include "magick/colormap.h"
  48 #include "magick/colorspace.h"
  49 #include "magick/constitute.h"
  50 #include "magick/exception.h"
  51 #include "magick/exception-private.h"
  52 #include "magick/geometry.h"
  53 #include "magick/image.h"
  54 #include "magick/image-private.h"
  55 #include "magick/list.h"
  56 #include "magick/magick.h"
  57 #include "magick/memory_.h"
  58 #include "magick/monitor.h"
  59 #include "magick/monitor-private.h"
  60 #include "magick/nt-feature.h"
  61 #include "magick/quantum-private.h"
  62 #include "magick/static.h"
  63 #include "magick/string_.h"
  64 #include "magick/module.h"
  65 #if defined(MAGICKCORE_JBIG_DELEGATE)
  66 #include "jbig.h"
  67 #endif
  68 \f
  69 /*
  70   Forward declarations.
  71 */
  72 #if defined(MAGICKCORE_JBIG_DELEGATE)
  73 static MagickBooleanType
  74   WriteJBIGImage(const ImageInfo *,Image *);
  75 #endif
  76 \f
  77 #if defined(MAGICKCORE_JBIG_DELEGATE)
  78 /*
  79 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  80 %                                                                             %
  81 %                                                                             %
  82 %                                                                             %
  83 %   R e a d J B I G I m a g e                                                 %
  84 %                                                                             %
  85 %                                                                             %
  86 %                                                                             %
  87 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  88 %
  89 %  ReadJBIGImage() reads a JBIG image file and returns it.  It
  90 %  allocates the memory necessary for the new Image structure and returns a
  91 %  pointer to the new image.
  92 %
  93 %  The format of the ReadJBIGImage method is:
  94 %
  95 %      Image *ReadJBIGImage(const ImageInfo *image_info,
  96 %        ExceptionInfo *exception)
  97 %
  98 %  A description of each parameter follows:
  99 %
 100 %    o image_info: the image info.
 101 %
 102 %    o exception: return any errors or warnings in this structure.
 103 %
 104 */
 105 static Image *ReadJBIGImage(const ImageInfo *image_info,
 106   ExceptionInfo *exception)
 107 {
 108   Image
 109     *image;
 110
 111   IndexPacket
 112     index;
 113
 114   ssize_t
 115     length,
 116     y;
 117
 118   MagickBooleanType
 119     status;
 120
 121   register IndexPacket
 122     *indexes;
 123
 124   register ssize_t
 125     x;
 126
 127   register PixelPacket
 128     *q;
 129
 130   register unsigned char
 131     *p;
 132
 133   ssize_t
 134     count;
 135
 136   struct jbg_dec_state
 137     jbig_info;
 138
 139   unsigned char
 140     bit,
 141     *buffer,
 142     byte;
 143
 144   /*
 145     Open image file.
 146   */
 147   assert(image_info != (const ImageInfo *) NULL);
 148   assert(image_info->signature == MagickSignature);
 149   if (image_info->debug != MagickFalse)
 150     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
 151       image_info->filename);
 152   assert(exception != (ExceptionInfo *) NULL);
 153   assert(exception->signature == MagickSignature);
 154   image=AcquireImage(image_info);
 155   status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
 156   if (status == MagickFalse)
 157     {
 158       image=DestroyImageList(image);
 159       return((Image *) NULL);
 160     }
 161   /*
 162     Initialize JBIG toolkit.
 163   */
 164   jbg_dec_init(&jbig_info);
 165   jbg_dec_maxsize(&jbig_info,(size_t) image->columns,(size_t)
 166     image->rows);
 167   image->columns=jbg_dec_getwidth(&jbig_info);
 168   image->rows=jbg_dec_getheight(&jbig_info);
 169   image->depth=8;
 170   image->storage_class=PseudoClass;
 171   image->colors=2;
 172   /*
 173     Read JBIG file.
 174   */
 175   buffer=(unsigned char *) AcquireQuantumMemory(MagickMaxBufferExtent,
 176     sizeof(*buffer));
 177   if (buffer == (unsigned char *) NULL)
 178     ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 179   status=JBG_EAGAIN;
 180   do
 181   {
 182     length=(ssize_t) ReadBlob(image,MagickMaxBufferExtent,buffer);
 183     if (length == 0)
 184       break;
 185     p=buffer;
 186     count=0;
 187     while ((length > 0) && ((status == JBG_EAGAIN) || (status == JBG_EOK)))
 188     {
 189       size_t
 190         count;
 191
 192       status=jbg_dec_in(&jbig_info,p,length,&count);
 193       p+=count;
 194       length-=(ssize_t) count;
 195     }
 196   } while ((status == JBG_EAGAIN) || (status == JBG_EOK));
 197   /*
 198     Create colormap.
 199   */
 200   image->columns=jbg_dec_getwidth(&jbig_info);
 201   image->rows=jbg_dec_getheight(&jbig_info);
 202   if (AcquireImageColormap(image,2) == MagickFalse)
 203     {
 204       buffer=(unsigned char *) RelinquishMagickMemory(buffer);
 205       ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 206     }
 207   image->colormap[0].red=0;
 208   image->colormap[0].green=0;
 209   image->colormap[0].blue=0;
 210   image->colormap[1].red=QuantumRange;
 211   image->colormap[1].green=QuantumRange;
 212   image->colormap[1].blue=QuantumRange;
 213   image->x_resolution=300;
 214   image->y_resolution=300;
 215   if (image_info->ping != MagickFalse)
 216     {
 217       (void) CloseBlob(image);
 218       return(GetFirstImageInList(image));
 219     }
 220   /*
 221     Convert X bitmap image to pixel packets.
 222   */
 223   p=jbg_dec_getimage(&jbig_info,0);
 224   for (y=0; y < (ssize_t) image->rows; y++)
 225   {
 226     q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
 227     if (q == (PixelPacket *) NULL)
 228       break;
 229     indexes=GetAuthenticIndexQueue(image);
 230     bit=0;
 231     byte=0;
 232     for (x=0; x < (ssize_t) image->columns; x++)
 233     {
 234       if (bit == 0)
 235         byte=(*p++);
 236       index=(byte & 0x80) ? 0 : 1;
 237       bit++;
 238       byte<<=1;
 239       if (bit == 8)
 240         bit=0;
 241       indexes[x]=index;
 242       *q++=image->colormap[(ssize_t) index];
 243     }
 244     if (SyncAuthenticPixels(image,exception) == MagickFalse)
 245       break;
 246     status=SetImageProgress(image,LoadImageTag,y,image->rows);
 247     if (status == MagickFalse)
 248       break;
 249   }
 250   /*
 251     Free scale resource.
 252   */
 253   jbg_dec_free(&jbig_info);
 254   buffer=(unsigned char *) RelinquishMagickMemory(buffer);
 255   (void) CloseBlob(image);
 256   return(GetFirstImageInList(image));
 257 }
 258 #endif
 259 \f
 260 /*
 261 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 262 %                                                                             %
 263 %                                                                             %
 264 %                                                                             %
 265 %   R e g i s t e r J B I G I m a g e                                         %
 266 %                                                                             %
 267 %                                                                             %
 268 %                                                                             %
 269 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 270 %
 271 %  RegisterJBIGImage() adds attributes for the JBIG image format to
 272 %  the list of supported formats.  The attributes include the image format
 273 %  tag, a method to read and/or write the format, whether the format
 274 %  supports the saving of more than one frame to the same file or blob,
 275 %  whether the format supports native in-memory I/O, and a brief
 276 %  description of the format.
 277 %
 278 %  The format of the RegisterJBIGImage method is:
 279 %
 280 %      size_t RegisterJBIGImage(void)
 281 %
 282 */
 283 ModuleExport size_t RegisterJBIGImage(void)
 284 {
 285 #define JBIGDescription  "Joint Bi-level Image experts Group interchange format"
 286
 287   char
 288     version[MaxTextExtent];
 289
 290   MagickInfo
 291     *entry;
 292
 293   *version='\0';
 294 #if defined(JBG_VERSION)
 295   (void) CopyMagickString(version,JBG_VERSION,MaxTextExtent);
 296 #endif
 297   entry=SetMagickInfo("BIE");
 298 #if defined(MAGICKCORE_JBIG_DELEGATE)
 299   entry->decoder=(DecodeImageHandler *) ReadJBIGImage;
 300   entry->encoder=(EncodeImageHandler *) WriteJBIGImage;
 301 #endif
 302   entry->adjoin=MagickFalse;
 303   entry->description=ConstantString(JBIGDescription);
 304   if (*version != '\0')
 305     entry->version=ConstantString(version);
 306   entry->module=ConstantString("JBIG");
 307   (void) RegisterMagickInfo(entry);
 308   entry=SetMagickInfo("JBG");
 309 #if defined(MAGICKCORE_JBIG_DELEGATE)
 310   entry->decoder=(DecodeImageHandler *) ReadJBIGImage;
 311   entry->encoder=(EncodeImageHandler *) WriteJBIGImage;
 312 #endif
 313   entry->description=ConstantString(JBIGDescription);
 314   if (*version != '\0')
 315     entry->version=ConstantString(version);
 316   entry->module=ConstantString("JBIG");
 317   (void) RegisterMagickInfo(entry);
 318   entry=SetMagickInfo("JBIG");
 319 #if defined(MAGICKCORE_JBIG_DELEGATE)
 320   entry->decoder=(DecodeImageHandler *) ReadJBIGImage;
 321   entry->encoder=(EncodeImageHandler *) WriteJBIGImage;
 322 #endif
 323   entry->description=ConstantString(JBIGDescription);
 324   if (*version != '\0')
 325     entry->version=ConstantString(version);
 326   entry->module=ConstantString("JBIG");
 327   (void) RegisterMagickInfo(entry);
 328   return(MagickImageCoderSignature);
 329 }
 330 \f
 331 /*
 332 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 333 %                                                                             %
 334 %                                                                             %
 335 %                                                                             %
 336 %   U n r e g i s t e r J B I G I m a g e                                     %
 337 %                                                                             %
 338 %                                                                             %
 339 %                                                                             %
 340 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 341 %
 342 %  UnregisterJBIGImage() removes format registrations made by the
 343 %  JBIG module from the list of supported formats.
 344 %
 345 %  The format of the UnregisterJBIGImage method is:
 346 %
 347 %      UnregisterJBIGImage(void)
 348 %
 349 */
 350 ModuleExport void UnregisterJBIGImage(void)
 351 {
 352   (void) UnregisterMagickInfo("BIE");
 353   (void) UnregisterMagickInfo("JBG");
 354   (void) UnregisterMagickInfo("JBIG");
 355 }
 356 \f
 357 #if defined(MAGICKCORE_JBIG_DELEGATE)
 358 /*
 359 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 360 %                                                                             %
 361 %                                                                             %
 362 %                                                                             %
 363 %   W r i t e J B I G I m a g e                                               %
 364 %                                                                             %
 365 %                                                                             %
 366 %                                                                             %
 367 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 368 %
 369 %  WriteJBIGImage() writes an image in the JBIG encoded image format.
 370 %
 371 %  The format of the WriteJBIGImage method is:
 372 %
 373 %      MagickBooleanType WriteJBIGImage(const ImageInfo *image_info,Image *image)
 374 %
 375 %  A description of each parameter follows.
 376 %
 377 %    o image_info: the image info.
 378 %
 379 %    o image:  The image.
 380 %
 381 %
 382 */
 383
 384 static void JBIGEncode(unsigned char *pixels,size_t length,void *data)
 385 {
 386   Image
 387     *image;
 388
 389   image=(Image *) data;
 390   (void) WriteBlob(image,length,pixels);
 391 }
 392
 393 static MagickBooleanType WriteJBIGImage(const ImageInfo *image_info,
 394   Image *image)
 395 {
 396   double
 397     version;
 398
 399   ssize_t
 400     y;
 401
 402   MagickBooleanType
 403     status;
 404
 405   MagickOffsetType
 406     scene;
 407
 408   register const IndexPacket
 409     *indexes;
 410
 411   register const PixelPacket
 412     *p;
 413
 414   register ssize_t
 415     x;
 416
 417   register unsigned char
 418     *q;
 419
 420   struct jbg_enc_state
 421     jbig_info;
 422
 423   unsigned char
 424     bit,
 425     byte,
 426     *pixels;
 427
 428   size_t
 429     number_packets;
 430
 431   /*
 432     Open image file.
 433   */
 434   assert(image_info != (const ImageInfo *) NULL);
 435   assert(image_info->signature == MagickSignature);
 436   assert(image != (Image *) NULL);
 437   assert(image->signature == MagickSignature);
 438   if (image->debug != MagickFalse)
 439     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
 440   status=OpenBlob(image_info,image,WriteBinaryBlobMode,&image->exception);
 441   if (status == MagickFalse)
 442     return(status);
 443   version=strtod(JBG_VERSION,(char **) NULL);
 444   scene=0;
 445   do
 446   {
 447     /*
 448       Allocate pixel data.
 449     */
 450     if (image->colorspace != RGBColorspace)
 451       (void) TransformImageColorspace(image,RGBColorspace);
 452     number_packets=(image->columns+7)/8;
 453     pixels=(unsigned char *) AcquireQuantumMemory(number_packets,
 454       image->rows*sizeof(*pixels));
 455     if (pixels == (unsigned char *) NULL)
 456       ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
 457     /*
 458       Convert pixels to a bitmap.
 459     */
 460     (void) SetImageType(image,BilevelType);
 461     q=pixels;
 462     for (y=0; y < (ssize_t) image->rows; y++)
 463     {
 464       p=GetVirtualPixels(image,0,y,image->columns,1,&image->exception);
 465       if (p == (const PixelPacket *) NULL)
 466         break;
 467       indexes=GetVirtualIndexQueue(image);
 468       bit=0;
 469       byte=0;
 470       for (x=0; x < (ssize_t) image->columns; x++)
 471       {
 472         byte<<=1;
 473         if (PixelIntensity(p) < (QuantumRange/2.0))
 474           byte|=0x01;
 475         bit++;
 476         if (bit == 8)
 477           {
 478             *q++=byte;
 479             bit=0;
 480             byte=0;
 481           }
 482         p++;
 483       }
 484       if (bit != 0)
 485         *q++=byte << (8-bit);
 486       if (image->previous == (Image *) NULL)
 487         {
 488           status=SetImageProgress(image,SaveImageTag,y,image->rows);
 489           if (status == MagickFalse)
 490             break;
 491         }
 492     }
 493     /*
 494       Initialize JBIG info structure.
 495     */
 496     jbg_enc_init(&jbig_info,image->columns,image->rows,1,&pixels,
 497       (void (*)(unsigned char *,size_t,void *)) JBIGEncode,image);
 498     if (image_info->scene != 0)
 499       jbg_enc_layers(&jbig_info,(int) image_info->scene);
 500     else
 501       {
 502         ssize_t
 503           sans_offset;
 504
 505         size_t
 506           x_resolution,
 507           y_resolution;
 508
 509         x_resolution=640;
 510         y_resolution=480;
 511         sans_offset=0;
 512         if (image_info->density != (char *) NULL)
 513           {
 514             GeometryInfo
 515               geometry_info;
 516
 517             MagickStatusType
 518               flags;
 519
 520             flags=ParseGeometry(image_info->density,&geometry_info);
 521             x_resolution=geometry_info.rho;
 522             y_resolution=geometry_info.sigma;
 523             if ((flags & SigmaValue) == 0)
 524               y_resolution=x_resolution;
 525           }
 526         if (image->units == PixelsPerCentimeterResolution)
 527           {
 528             x_resolution=(size_t) (100.0*2.54*x_resolution+0.5)/100.0;
 529             y_resolution=(size_t) (100.0*2.54*y_resolution+0.5)/100.0;
 530           }
 531         (void) jbg_enc_lrlmax(&jbig_info,x_resolution,y_resolution);
 532       }
 533     (void) jbg_enc_lrange(&jbig_info,-1,-1);
 534     jbg_enc_options(&jbig_info,JBG_ILEAVE | JBG_SMID,JBG_TPDON | JBG_TPBON |
 535       JBG_DPON,version < 1.6 ? -1 : 0,-1,-1);
 536     /*
 537       Write JBIG image.
 538     */
 539     jbg_enc_out(&jbig_info);
 540     jbg_enc_free(&jbig_info);
 541     pixels=(unsigned char *) RelinquishMagickMemory(pixels);
 542     if (GetNextImageInList(image) == (Image *) NULL)
 543       break;
 544     image=SyncNextImageInList(image);
 545     status=SetImageProgress(image,SaveImagesTag,scene++,
 546       GetImageListLength(image));
 547     if (status == MagickFalse)
 548       break;
 549   } while (image_info->adjoin != MagickFalse);
 550   (void) CloseBlob(image);
 551   return(MagickTrue);
 552 }
 553 #endif