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

   1 /*
   2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
   3 %                                                                             %
   4 %                                                                             %
   5 %                                                                             %
   6 %                            EEEEE  PPPP   TTTTT                              %
   7 %                            E      P   P    T                                %
   8 %                            EEE    PPPP     T                                %
   9 %                            E      P        T                                %
  10 %                            EEEEE  P        T                                %
  11 %                                                                             %
  12 %                                                                             %
  13 %           Read/Write Encapsulated Postscript Format (with preview).         %
  14 %                                                                             %
  15 %                              Software Design                                %
  16 %                                   Cristy                                    %
  17 %                                 July 1992                                   %
  18 %                                                                             %
  19 %                                                                             %
  20 %  Copyright 1999-2017 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 %    https://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 "MagickCore/studio.h"
  43 #include "MagickCore/blob.h"
  44 #include "MagickCore/blob-private.h"
  45 #include "MagickCore/color.h"
  46 #include "MagickCore/constitute.h"
  47 #include "MagickCore/draw.h"
  48 #include "MagickCore/exception.h"
  49 #include "MagickCore/exception-private.h"
  50 #include "MagickCore/delegate.h"
  51 #include "MagickCore/geometry.h"
  52 #include "MagickCore/histogram.h"
  53 #include "MagickCore/image.h"
  54 #include "MagickCore/image-private.h"
  55 #include "MagickCore/list.h"
  56 #include "MagickCore/magick.h"
  57 #include "MagickCore/memory_.h"
  58 #include "MagickCore/monitor.h"
  59 #include "MagickCore/monitor-private.h"
  60 #include "MagickCore/quantize.h"
  61 #include "MagickCore/resource_.h"
  62 #include "MagickCore/resize.h"
  63 #include "MagickCore/quantum-private.h"
  64 #include "MagickCore/static.h"
  65 #include "MagickCore/string_.h"
  66 #include "MagickCore/module.h"
  67 #include "MagickCore/utility.h"
  68 \f
  69 /*
  70   Typedef declarations.
  71 */
  72 typedef struct _EPTInfo
  73 {
  74   size_t
  75     magick;
  76
  77   MagickOffsetType
  78     postscript_offset,
  79     tiff_offset;
  80
  81   size_t
  82     postscript_length,
  83     tiff_length;
  84
  85   unsigned char
  86     *postscript,
  87     *tiff;
  88 } EPTInfo;
  89 \f
  90 /*
  91   Forward declarations.
  92 */
  93 static MagickBooleanType
  94   WriteEPTImage(const ImageInfo *,Image *,ExceptionInfo *);
  95 \f
  96 /*
  97 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  98 %                                                                             %
  99 %                                                                             %
 100 %                                                                             %
 101 %   I s E P T                                                                 %
 102 %                                                                             %
 103 %                                                                             %
 104 %                                                                             %
 105 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 106 %
 107 %  IsEPT() returns MagickTrue if the image format type, identified by the
 108 %  magick string, is EPT.
 109 %
 110 %  The format of the IsEPT method is:
 111 %
 112 %      MagickBooleanType IsEPT(const unsigned char *magick,const size_t length)
 113 %
 114 %  A description of each parameter follows:
 115 %
 116 %    o magick: compare image format pattern against these bytes.
 117 %
 118 %    o length: Specifies the length of the magick string.
 119 %
 120 */
 121 static MagickBooleanType IsEPT(const unsigned char *magick,const size_t length)
 122 {
 123   if (length < 4)
 124     return(MagickFalse);
 125   if (memcmp(magick,"\305\320\323\306",4) == 0)
 126     return(MagickTrue);
 127   return(MagickFalse);
 128 }
 129 \f
 130 /*
 131 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 132 %                                                                             %
 133 %                                                                             %
 134 %                                                                             %
 135 %   R e a d E P T I m a g e                                                   %
 136 %                                                                             %
 137 %                                                                             %
 138 %                                                                             %
 139 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 140 %
 141 %  ReadEPTImage() reads a binary Postscript image file and returns it.  It
 142 %  allocates the memory necessary for the new Image structure and returns a
 143 %  pointer to the new image.
 144 %
 145 %  The format of the ReadEPTImage method is:
 146 %
 147 %      Image *ReadEPTImage(const ImageInfo *image_info,
 148 %        ExceptionInfo *exception)
 149 %
 150 %  A description of each parameter follows:
 151 %
 152 %    o image_info: the image info.
 153 %
 154 %    o exception: return any errors or warnings in this structure.
 155 %
 156 */
 157 static Image *ReadEPTImage(const ImageInfo *image_info,ExceptionInfo *exception)
 158 {
 159   EPTInfo
 160     ept_info;
 161
 162   Image
 163     *image;
 164
 165   ImageInfo
 166     *read_info;
 167
 168   MagickBooleanType
 169     status;
 170
 171   MagickOffsetType
 172     offset;
 173
 174   ssize_t
 175     count;
 176
 177   /*
 178     Open image file.
 179   */
 180   assert(image_info != (const ImageInfo *) NULL);
 181   assert(image_info->signature == MagickCoreSignature);
 182   if (image_info->debug != MagickFalse)
 183     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
 184       image_info->filename);
 185   assert(exception != (ExceptionInfo *) NULL);
 186   assert(exception->signature == MagickCoreSignature);
 187   image=AcquireImage(image_info,exception);
 188   status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
 189   if (status == MagickFalse)
 190     {
 191       image=DestroyImageList(image);
 192       return((Image *) NULL);
 193     }
 194   ept_info.magick=ReadBlobLSBLong(image);
 195   if (ept_info.magick != 0xc6d3d0c5ul)
 196     ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 197   ept_info.postscript_offset=(MagickOffsetType) ReadBlobLSBLong(image);
 198   ept_info.postscript_length=ReadBlobLSBLong(image);
 199   (void) ReadBlobLSBLong(image);
 200   (void) ReadBlobLSBLong(image);
 201   ept_info.tiff_offset=(MagickOffsetType) ReadBlobLSBLong(image);
 202   ept_info.tiff_length=ReadBlobLSBLong(image);
 203   (void) ReadBlobLSBShort(image);
 204   ept_info.postscript=(unsigned char *) AcquireQuantumMemory(
 205     ept_info.postscript_length+1,sizeof(*ept_info.postscript));
 206   if (ept_info.postscript == (unsigned char *) NULL)
 207     ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 208   (void) ResetMagickMemory(ept_info.postscript,0,(ept_info.postscript_length+1)*
 209     sizeof(*ept_info.postscript));
 210   ept_info.tiff=(unsigned char *) AcquireQuantumMemory(ept_info.tiff_length+1,
 211     sizeof(*ept_info.tiff));
 212   if (ept_info.tiff == (unsigned char *) NULL)
 213     {
 214       ept_info.postscript=(unsigned char *) RelinquishMagickMemory(
 215         ept_info.postscript);
 216       ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 217     }
 218   (void) ResetMagickMemory(ept_info.tiff,0,(ept_info.tiff_length+1)*
 219     sizeof(*ept_info.tiff));
 220   offset=SeekBlob(image,ept_info.tiff_offset,SEEK_SET);
 221   if ((ept_info.tiff_length != 0) && (offset < 30))
 222     {
 223       ept_info.tiff=(unsigned char *) RelinquishMagickMemory(ept_info.tiff);
 224       ept_info.postscript=(unsigned char *) RelinquishMagickMemory(
 225         ept_info.postscript);
 226       ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 227     }
 228   count=ReadBlob(image,ept_info.tiff_length,ept_info.tiff);
 229   if (count != (ssize_t) (ept_info.tiff_length))
 230     (void) ThrowMagickException(exception,GetMagickModule(),CorruptImageWarning,
 231       "InsufficientImageDataInFile","`%s'",image->filename);
 232   offset=SeekBlob(image,ept_info.postscript_offset,SEEK_SET);
 233   if ((ept_info.postscript_length != 0) && (offset < 30))
 234     {
 235       ept_info.tiff=(unsigned char *) RelinquishMagickMemory(ept_info.tiff);
 236       ept_info.postscript=(unsigned char *) RelinquishMagickMemory(
 237         ept_info.postscript);
 238       ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 239     }
 240   count=ReadBlob(image,ept_info.postscript_length,ept_info.postscript);
 241   if (count != (ssize_t) (ept_info.postscript_length))
 242     (void) ThrowMagickException(exception,GetMagickModule(),CorruptImageWarning,
 243       "InsufficientImageDataInFile","`%s'",image->filename);
 244   (void) CloseBlob(image);
 245   image=DestroyImage(image);
 246   read_info=CloneImageInfo(image_info);
 247   (void) CopyMagickString(read_info->magick,"EPS",MagickPathExtent);
 248   image=BlobToImage(read_info,ept_info.postscript,ept_info.postscript_length,
 249     exception);
 250   if (image == (Image *) NULL)
 251     {
 252       (void) CopyMagickString(read_info->magick,"TIFF",MagickPathExtent);
 253       image=BlobToImage(read_info,ept_info.tiff,ept_info.tiff_length,exception);
 254     }
 255   read_info=DestroyImageInfo(read_info);
 256   if (image != (Image *) NULL)
 257     {
 258       (void) CopyMagickString(image->filename,image_info->filename,
 259         MagickPathExtent);
 260       (void) CopyMagickString(image->magick,"EPT",MagickPathExtent);
 261     }
 262   ept_info.tiff=(unsigned char *) RelinquishMagickMemory(ept_info.tiff);
 263   ept_info.postscript=(unsigned char *) RelinquishMagickMemory(
 264     ept_info.postscript);
 265   return(image);
 266 }
 267 \f
 268 /*
 269 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 270 %                                                                             %
 271 %                                                                             %
 272 %                                                                             %
 273 %   R e g i s t e r E P T I m a g e                                           %
 274 %                                                                             %
 275 %                                                                             %
 276 %                                                                             %
 277 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 278 %
 279 %  RegisterEPTImage() adds attributes for the EPT image format to
 280 %  the list of supported formats.  The attributes include the image format
 281 %  tag, a method to read and/or write the format, whether the format
 282 %  supports the saving of more than one frame to the same file or blob,
 283 %  whether the format supports native in-memory I/O, and a brief
 284 %  description of the format.
 285 %
 286 %  The format of the RegisterEPTImage method is:
 287 %
 288 %      size_t RegisterEPTImage(void)
 289 %
 290 */
 291 ModuleExport size_t RegisterEPTImage(void)
 292 {
 293   MagickInfo
 294     *entry;
 295
 296   entry=AcquireMagickInfo("EPT","EPT",
 297     "Encapsulated PostScript with TIFF preview");
 298   entry->decoder=(DecodeImageHandler *) ReadEPTImage;
 299   entry->encoder=(EncodeImageHandler *) WriteEPTImage;
 300   entry->magick=(IsImageFormatHandler *) IsEPT;
 301   entry->flags|=CoderDecoderSeekableStreamFlag;
 302   entry->flags^=CoderAdjoinFlag;
 303   entry->flags^=CoderBlobSupportFlag;
 304   (void) RegisterMagickInfo(entry);
 305   entry=AcquireMagickInfo("EPT","EPT2",
 306     "Encapsulated PostScript Level II with TIFF preview");
 307   entry->decoder=(DecodeImageHandler *) ReadEPTImage;
 308   entry->encoder=(EncodeImageHandler *) WriteEPTImage;
 309   entry->magick=(IsImageFormatHandler *) IsEPT;
 310   entry->flags^=CoderAdjoinFlag;
 311   entry->flags|=CoderDecoderSeekableStreamFlag;
 312   entry->flags^=CoderBlobSupportFlag;
 313   (void) RegisterMagickInfo(entry);
 314   entry=AcquireMagickInfo("EPT","EPT3",
 315     "Encapsulated PostScript Level III with TIFF preview");
 316   entry->decoder=(DecodeImageHandler *) ReadEPTImage;
 317   entry->encoder=(EncodeImageHandler *) WriteEPTImage;
 318   entry->magick=(IsImageFormatHandler *) IsEPT;
 319   entry->flags|=CoderDecoderSeekableStreamFlag;
 320   entry->flags^=CoderBlobSupportFlag;
 321   (void) RegisterMagickInfo(entry);
 322   return(MagickImageCoderSignature);
 323 }
 324 \f
 325 /*
 326 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 327 %                                                                             %
 328 %                                                                             %
 329 %                                                                             %
 330 %   U n r e g i s t e r E P T I m a g e                                       %
 331 %                                                                             %
 332 %                                                                             %
 333 %                                                                             %
 334 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 335 %
 336 %  UnregisterEPTImage() removes format registrations made by the
 337 %  EPT module from the list of supported formats.
 338 %
 339 %  The format of the UnregisterEPTImage method is:
 340 %
 341 %      UnregisterEPTImage(void)
 342 %
 343 */
 344 ModuleExport void UnregisterEPTImage(void)
 345 {
 346   (void) UnregisterMagickInfo("EPT");
 347 }
 348 \f
 349 /*
 350 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 351 %                                                                             %
 352 %                                                                             %
 353 %                                                                             %
 354 %   W r i t e E P T I m a g e                                                 %
 355 %                                                                             %
 356 %                                                                             %
 357 %                                                                             %
 358 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 359 %
 360 %  WriteEPTImage() writes an image in the Encapsulated Postscript format
 361 %  with a TIFF preview.
 362 %
 363 %  The format of the WriteEPTImage method is:
 364 %
 365 %      MagickBooleanType WriteEPTImage(const ImageInfo *image_info,
 366 %        Image *image,ExceptionInfo *exception)
 367 %
 368 %  A description of each parameter follows.
 369 %
 370 %    o image_info: the image info.
 371 %
 372 %    o image:  The image.
 373 %
 374 %    o exception: return any errors or warnings in this structure.
 375 %
 376 */
 377 static MagickBooleanType WriteEPTImage(const ImageInfo *image_info,Image *image,
 378   ExceptionInfo *exception)
 379 {
 380   char
 381      filename[MagickPathExtent];
 382
 383   EPTInfo
 384     ept_info;
 385
 386   Image
 387     *write_image;
 388
 389   ImageInfo
 390     *write_info;
 391
 392   MagickBooleanType
 393     status;
 394
 395   /*
 396     Write EPT image.
 397   */
 398   assert(image_info != (const ImageInfo *) NULL);
 399   assert(image_info->signature == MagickCoreSignature);
 400   assert(image != (Image *) NULL);
 401   assert(image->signature == MagickCoreSignature);
 402   if (image->debug != MagickFalse)
 403     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
 404   assert(exception != (ExceptionInfo *) NULL);
 405   assert(exception->signature == MagickCoreSignature);
 406   status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception);
 407   if (status == MagickFalse)
 408     return(status);
 409   write_image=CloneImage(image,0,0,MagickTrue,exception);
 410   if (write_image == (Image *) NULL)
 411     return(MagickFalse);
 412   write_info=CloneImageInfo(image_info);
 413   (void) CopyMagickString(write_info->magick,"EPS",MagickPathExtent);
 414   if (LocaleCompare(image_info->magick,"EPT2") == 0)
 415     (void) CopyMagickString(write_info->magick,"EPS2",MagickPathExtent);
 416   if (LocaleCompare(image_info->magick,"EPT3") == 0)
 417     (void) CopyMagickString(write_info->magick,"EPS3",MagickPathExtent);
 418   (void) ResetMagickMemory(&ept_info,0,sizeof(ept_info));
 419   ept_info.magick=0xc6d3d0c5ul;
 420   ept_info.postscript=(unsigned char *) ImageToBlob(write_info,write_image,
 421     &ept_info.postscript_length,exception);
 422   write_image=DestroyImage(write_image);
 423   write_info=DestroyImageInfo(write_info);
 424   if (ept_info.postscript == (void *) NULL)
 425     return(MagickFalse);
 426   write_image=CloneImage(image,0,0,MagickTrue,exception);
 427   if (write_image == (Image *) NULL)
 428     return(MagickFalse);
 429   write_info=CloneImageInfo(image_info);
 430   *write_info->magick='\0';
 431   (void) CopyMagickString(write_info->magick,"TIFF",MagickPathExtent);
 432   (void) FormatLocaleString(filename,MagickPathExtent,"tiff:%s",
 433     write_info->filename);
 434   (void) CopyMagickString(write_info->filename,filename,MagickPathExtent);
 435   if ((write_image->columns > 512) || (write_image->rows > 512))
 436     {
 437       Image
 438         *resize_image;
 439
 440       resize_image=ResizeImage(write_image,512,512,write_image->filter,
 441         exception);
 442       if (resize_image != (Image *) NULL)
 443         {
 444           write_image=DestroyImage(write_image);
 445           write_image=resize_image;
 446         }
 447     }
 448   if ((write_image->storage_class == DirectClass) ||
 449       (write_image->colors > 256))
 450     {
 451       QuantizeInfo
 452         quantize_info;
 453
 454       /*
 455         EPT preview requires that the image is colormapped.
 456       */
 457       GetQuantizeInfo(&quantize_info);
 458       quantize_info.dither_method=IdentifyPaletteImage(write_image,
 459         exception) == MagickFalse ? RiemersmaDitherMethod : NoDitherMethod;
 460       (void) QuantizeImage(&quantize_info,write_image,exception);
 461     }
 462   write_info->compression=NoCompression;
 463   ept_info.tiff=(unsigned char *) ImageToBlob(write_info,write_image,
 464     &ept_info.tiff_length,exception);
 465   write_image=DestroyImage(write_image);
 466   write_info=DestroyImageInfo(write_info);
 467   if (ept_info.tiff == (void *) NULL)
 468     {
 469       ept_info.postscript=(unsigned char *) RelinquishMagickMemory(
 470         ept_info.postscript);
 471       return(MagickFalse);
 472     }
 473   /*
 474     Write EPT image.
 475   */
 476   (void) WriteBlobLSBLong(image,(unsigned int) ept_info.magick);
 477   (void) WriteBlobLSBLong(image,30);
 478   (void) WriteBlobLSBLong(image,(unsigned int) ept_info.postscript_length);
 479   (void) WriteBlobLSBLong(image,0);
 480   (void) WriteBlobLSBLong(image,0);
 481   (void) WriteBlobLSBLong(image,(unsigned int) ept_info.postscript_length+30);
 482   (void) WriteBlobLSBLong(image,(unsigned int) ept_info.tiff_length);
 483   (void) WriteBlobLSBShort(image,0xffff);
 484   (void) WriteBlob(image,ept_info.postscript_length,ept_info.postscript);
 485   (void) WriteBlob(image,ept_info.tiff_length,ept_info.tiff);
 486   /*
 487     Relinquish resources.
 488   */
 489   ept_info.postscript=(unsigned char *) RelinquishMagickMemory(
 490     ept_info.postscript);
 491   ept_info.tiff=(unsigned char *) RelinquishMagickMemory(ept_info.tiff);
 492   (void) CloseBlob(image);
 493   return(MagickTrue);
 494 }