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,(unsigned long) image->columns,(unsigned long)
 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,(MagickOffsetType) y,
 247                 image->rows);
 248     if (status == MagickFalse)
 249       break;
 250   }
 251   /*
 252     Free scale resource.
 253   */
 254   jbg_dec_free(&jbig_info);
 255   buffer=(unsigned char *) RelinquishMagickMemory(buffer);
 256   (void) CloseBlob(image);
 257   return(GetFirstImageInList(image));
 258 }
 259 #endif
 260 \f
 261 /*
 262 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 263 %                                                                             %
 264 %                                                                             %
 265 %                                                                             %
 266 %   R e g i s t e r J B I G I m a g e                                         %
 267 %                                                                             %
 268 %                                                                             %
 269 %                                                                             %
 270 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 271 %
 272 %  RegisterJBIGImage() adds attributes for the JBIG image format to
 273 %  the list of supported formats.  The attributes include the image format
 274 %  tag, a method to read and/or write the format, whether the format
 275 %  supports the saving of more than one frame to the same file or blob,
 276 %  whether the format supports native in-memory I/O, and a brief
 277 %  description of the format.
 278 %
 279 %  The format of the RegisterJBIGImage method is:
 280 %
 281 %      size_t RegisterJBIGImage(void)
 282 %
 283 */
 284 ModuleExport size_t RegisterJBIGImage(void)
 285 {
 286 #define JBIGDescription  "Joint Bi-level Image experts Group interchange format"
 287
 288   char
 289     version[MaxTextExtent];
 290
 291   MagickInfo
 292     *entry;
 293
 294   *version='\0';
 295 #if defined(JBG_VERSION)
 296   (void) CopyMagickString(version,JBG_VERSION,MaxTextExtent);
 297 #endif
 298   entry=SetMagickInfo("BIE");
 299 #if defined(MAGICKCORE_JBIG_DELEGATE)
 300   entry->decoder=(DecodeImageHandler *) ReadJBIGImage;
 301   entry->encoder=(EncodeImageHandler *) WriteJBIGImage;
 302 #endif
 303   entry->adjoin=MagickFalse;
 304   entry->description=ConstantString(JBIGDescription);
 305   if (*version != '\0')
 306     entry->version=ConstantString(version);
 307   entry->module=ConstantString("JBIG");
 308   (void) RegisterMagickInfo(entry);
 309   entry=SetMagickInfo("JBG");
 310 #if defined(MAGICKCORE_JBIG_DELEGATE)
 311   entry->decoder=(DecodeImageHandler *) ReadJBIGImage;
 312   entry->encoder=(EncodeImageHandler *) WriteJBIGImage;
 313 #endif
 314   entry->description=ConstantString(JBIGDescription);
 315   if (*version != '\0')
 316     entry->version=ConstantString(version);
 317   entry->module=ConstantString("JBIG");
 318   (void) RegisterMagickInfo(entry);
 319   entry=SetMagickInfo("JBIG");
 320 #if defined(MAGICKCORE_JBIG_DELEGATE)
 321   entry->decoder=(DecodeImageHandler *) ReadJBIGImage;
 322   entry->encoder=(EncodeImageHandler *) WriteJBIGImage;
 323 #endif
 324   entry->description=ConstantString(JBIGDescription);
 325   if (*version != '\0')
 326     entry->version=ConstantString(version);
 327   entry->module=ConstantString("JBIG");
 328   (void) RegisterMagickInfo(entry);
 329   return(MagickImageCoderSignature);
 330 }
 331 \f
 332 /*
 333 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 334 %                                                                             %
 335 %                                                                             %
 336 %                                                                             %
 337 %   U n r e g i s t e r J B I G I m a g e                                     %
 338 %                                                                             %
 339 %                                                                             %
 340 %                                                                             %
 341 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 342 %
 343 %  UnregisterJBIGImage() removes format registrations made by the
 344 %  JBIG module from the list of supported formats.
 345 %
 346 %  The format of the UnregisterJBIGImage method is:
 347 %
 348 %      UnregisterJBIGImage(void)
 349 %
 350 */
 351 ModuleExport void UnregisterJBIGImage(void)
 352 {
 353   (void) UnregisterMagickInfo("BIE");
 354   (void) UnregisterMagickInfo("JBG");
 355   (void) UnregisterMagickInfo("JBIG");
 356 }
 357 \f
 358 #if defined(MAGICKCORE_JBIG_DELEGATE)
 359 /*
 360 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 361 %                                                                             %
 362 %                                                                             %
 363 %                                                                             %
 364 %   W r i t e J B I G I m a g e                                               %
 365 %                                                                             %
 366 %                                                                             %
 367 %                                                                             %
 368 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 369 %
 370 %  WriteJBIGImage() writes an image in the JBIG encoded image format.
 371 %
 372 %  The format of the WriteJBIGImage method is:
 373 %
 374 %      MagickBooleanType WriteJBIGImage(const ImageInfo *image_info,Image *image)
 375 %
 376 %  A description of each parameter follows.
 377 %
 378 %    o image_info: the image info.
 379 %
 380 %    o image:  The image.
 381 %
 382 %
 383 */
 384
 385 static void JBIGEncode(unsigned char *pixels,size_t length,void *data)
 386 {
 387   Image
 388     *image;
 389
 390   image=(Image *) data;
 391   (void) WriteBlob(image,length,pixels);
 392 }
 393
 394 static MagickBooleanType WriteJBIGImage(const ImageInfo *image_info,
 395   Image *image)
 396 {
 397   double
 398     version;
 399
 400   ssize_t
 401     y;
 402
 403   MagickBooleanType
 404     status;
 405
 406   MagickOffsetType
 407     scene;
 408
 409   register const IndexPacket
 410     *indexes;
 411
 412   register const PixelPacket
 413     *p;
 414
 415   register ssize_t
 416     x;
 417
 418   register unsigned char
 419     *q;
 420
 421   struct jbg_enc_state
 422     jbig_info;
 423
 424   unsigned char
 425     bit,
 426     byte,
 427     *pixels;
 428
 429   size_t
 430     number_packets;
 431
 432   /*
 433     Open image file.
 434   */
 435   assert(image_info != (const ImageInfo *) NULL);
 436   assert(image_info->signature == MagickSignature);
 437   assert(image != (Image *) NULL);
 438   assert(image->signature == MagickSignature);
 439   if (image->debug != MagickFalse)
 440     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
 441   status=OpenBlob(image_info,image,WriteBinaryBlobMode,&image->exception);
 442   if (status == MagickFalse)
 443     return(status);
 444   version=strtod(JBG_VERSION,(char **) NULL);
 445   scene=0;
 446   do
 447   {
 448     /*
 449       Allocate pixel data.
 450     */
 451     if (image->colorspace != RGBColorspace)
 452       (void) TransformImageColorspace(image,RGBColorspace);
 453     number_packets=(image->columns+7)/8;
 454     pixels=(unsigned char *) AcquireQuantumMemory(number_packets,
 455       image->rows*sizeof(*pixels));
 456     if (pixels == (unsigned char *) NULL)
 457       ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
 458     /*
 459       Convert pixels to a bitmap.
 460     */
 461     (void) SetImageType(image,BilevelType);
 462     q=pixels;
 463     for (y=0; y < (ssize_t) image->rows; y++)
 464     {
 465       p=GetVirtualPixels(image,0,y,image->columns,1,&image->exception);
 466       if (p == (const PixelPacket *) NULL)
 467         break;
 468       indexes=GetVirtualIndexQueue(image);
 469       bit=0;
 470       byte=0;
 471       for (x=0; x < (ssize_t) image->columns; x++)
 472       {
 473         byte<<=1;
 474         if (PixelIntensity(p) < (QuantumRange/2.0))
 475           byte|=0x01;
 476         bit++;
 477         if (bit == 8)
 478           {
 479             *q++=byte;
 480             bit=0;
 481             byte=0;
 482           }
 483         p++;
 484       }
 485       if (bit != 0)
 486         *q++=byte << (8-bit);
 487       if (image->previous == (Image *) NULL)
 488         {
 489           status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
 490                 image->rows);
 491           if (status == MagickFalse)
 492             break;
 493         }
 494     }
 495     /*
 496       Initialize JBIG info structure.
 497     */
 498     jbg_enc_init(&jbig_info,(unsigned long) image->columns,(unsigned long)
 499       image->rows,1,&pixels,(void (*)(unsigned char *,size_t,void *))
 500       JBIGEncode,image);
 501     if (image_info->scene != 0)
 502       jbg_enc_layers(&jbig_info,(int) image_info->scene);
 503     else
 504       {
 505         ssize_t
 506           sans_offset;
 507
 508         size_t
 509           x_resolution,
 510           y_resolution;
 511
 512         x_resolution=640;
 513         y_resolution=480;
 514         sans_offset=0;
 515         if (image_info->density != (char *) NULL)
 516           {
 517             GeometryInfo
 518               geometry_info;
 519
 520             MagickStatusType
 521               flags;
 522
 523             flags=ParseGeometry(image_info->density,&geometry_info);
 524             x_resolution=geometry_info.rho;
 525             y_resolution=geometry_info.sigma;
 526             if ((flags & SigmaValue) == 0)
 527               y_resolution=x_resolution;
 528           }
 529         if (image->units == PixelsPerCentimeterResolution)
 530           {
 531             x_resolution=(size_t) (100.0*2.54*x_resolution+0.5)/100.0;
 532             y_resolution=(size_t) (100.0*2.54*y_resolution+0.5)/100.0;
 533           }
 534         (void) jbg_enc_lrlmax(&jbig_info,(unsigned long) x_resolution,
 535           (unsigned long) y_resolution);
 536       }
 537     (void) jbg_enc_lrange(&jbig_info,-1,-1);
 538     jbg_enc_options(&jbig_info,JBG_ILEAVE | JBG_SMID,JBG_TPDON | JBG_TPBON |
 539       JBG_DPON,version < 1.6 ? -1 : 0,-1,-1);
 540     /*
 541       Write JBIG image.
 542     */
 543     jbg_enc_out(&jbig_info);
 544     jbg_enc_free(&jbig_info);
 545     pixels=(unsigned char *) RelinquishMagickMemory(pixels);
 546     if (GetNextImageInList(image) == (Image *) NULL)
 547       break;
 548     image=SyncNextImageInList(image);
 549     status=SetImageProgress(image,SaveImagesTag,scene++,
 550       GetImageListLength(image));
 551     if (status == MagickFalse)
 552       break;
 553   } while (image_info->adjoin != MagickFalse);
 554   (void) CloseBlob(image);
 555   return(MagickTrue);
 556 }
 557 #endif