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 1999-2014 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 "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/quantum-private.h"
  63 #include "MagickCore/static.h"
  64 #include "MagickCore/string_.h"
  65 #include "MagickCore/module.h"
  66 #include "MagickCore/transform.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 == MagickSignature);
 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 == MagickSignature);
 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     ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 214   (void) ResetMagickMemory(ept_info.tiff,0,(ept_info.tiff_length+1)*
 215     sizeof(*ept_info.tiff));
 216   offset=SeekBlob(image,ept_info.tiff_offset,SEEK_SET);
 217   if (offset < 0)
 218     ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 219   count=ReadBlob(image,ept_info.tiff_length,ept_info.tiff);
 220   if (count != (ssize_t) (ept_info.tiff_length))
 221     (void) ThrowMagickException(exception,GetMagickModule(),CorruptImageWarning,
 222       "InsufficientImageDataInFile","`%s'",image->filename);
 223   offset=SeekBlob(image,ept_info.postscript_offset,SEEK_SET);
 224   if (offset < 0)
 225     ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 226   count=ReadBlob(image,ept_info.postscript_length,ept_info.postscript);
 227   if (count != (ssize_t) (ept_info.postscript_length))
 228     (void) ThrowMagickException(exception,GetMagickModule(),CorruptImageWarning,
 229       "InsufficientImageDataInFile","`%s'",image->filename);
 230   (void) CloseBlob(image);
 231   image=DestroyImage(image);
 232   read_info=CloneImageInfo(image_info);
 233   (void) CopyMagickString(read_info->magick,"EPS",MaxTextExtent);
 234   image=BlobToImage(read_info,ept_info.postscript,ept_info.postscript_length,
 235     exception);
 236   if (image == (Image *) NULL)
 237     {
 238       (void) CopyMagickString(read_info->magick,"TIFF",MaxTextExtent);
 239       image=BlobToImage(read_info,ept_info.tiff,ept_info.tiff_length,exception);
 240     }
 241   read_info=DestroyImageInfo(read_info);
 242   if (image != (Image *) NULL)
 243     {
 244       (void) CopyMagickString(image->filename,image_info->filename,
 245         MaxTextExtent);
 246       (void) CopyMagickString(image->magick,"EPT",MaxTextExtent);
 247     }
 248   ept_info.tiff=(unsigned char *) RelinquishMagickMemory(ept_info.tiff);
 249   ept_info.postscript=(unsigned char *) RelinquishMagickMemory(
 250     ept_info.postscript);
 251   return(image);
 252 }
 253 \f
 254 /*
 255 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 256 %                                                                             %
 257 %                                                                             %
 258 %                                                                             %
 259 %   R e g i s t e r E P T I m a g e                                           %
 260 %                                                                             %
 261 %                                                                             %
 262 %                                                                             %
 263 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 264 %
 265 %  RegisterEPTImage() adds attributes for the EPT image format to
 266 %  the list of supported formats.  The attributes include the image format
 267 %  tag, a method to read and/or write the format, whether the format
 268 %  supports the saving of more than one frame to the same file or blob,
 269 %  whether the format supports native in-memory I/O, and a brief
 270 %  description of the format.
 271 %
 272 %  The format of the RegisterEPTImage method is:
 273 %
 274 %      size_t RegisterEPTImage(void)
 275 %
 276 */
 277 ModuleExport size_t RegisterEPTImage(void)
 278 {
 279   MagickInfo
 280     *entry;
 281
 282   entry=SetMagickInfo("EPT");
 283   entry->decoder=(DecodeImageHandler *) ReadEPTImage;
 284   entry->encoder=(EncodeImageHandler *) WriteEPTImage;
 285   entry->magick=(IsImageFormatHandler *) IsEPT;
 286   entry->seekable_stream=MagickTrue;
 287   entry->adjoin=MagickFalse;
 288   entry->blob_support=MagickFalse;
 289   entry->description=ConstantString(
 290     "Encapsulated PostScript with TIFF preview");
 291   entry->module=ConstantString("EPT");
 292   (void) RegisterMagickInfo(entry);
 293   entry=SetMagickInfo("EPT2");
 294   entry->decoder=(DecodeImageHandler *) ReadEPTImage;
 295   entry->encoder=(EncodeImageHandler *) WriteEPTImage;
 296   entry->magick=(IsImageFormatHandler *) IsEPT;
 297   entry->adjoin=MagickFalse;
 298   entry->seekable_stream=MagickTrue;
 299   entry->blob_support=MagickFalse;
 300   entry->description=ConstantString(
 301     "Encapsulated PostScript Level II with TIFF preview");
 302   entry->module=ConstantString("EPT");
 303   (void) RegisterMagickInfo(entry);
 304   entry=SetMagickInfo("EPT3");
 305   entry->decoder=(DecodeImageHandler *) ReadEPTImage;
 306   entry->encoder=(EncodeImageHandler *) WriteEPTImage;
 307   entry->magick=(IsImageFormatHandler *) IsEPT;
 308   entry->seekable_stream=MagickTrue;
 309   entry->blob_support=MagickFalse;
 310   entry->description=ConstantString(
 311     "Encapsulated PostScript Level III with TIFF preview");
 312   entry->module=ConstantString("EPT");
 313   (void) RegisterMagickInfo(entry);
 314   return(MagickImageCoderSignature);
 315 }
 316 \f
 317 /*
 318 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 319 %                                                                             %
 320 %                                                                             %
 321 %                                                                             %
 322 %   U n r e g i s t e r E P T I m a g e                                       %
 323 %                                                                             %
 324 %                                                                             %
 325 %                                                                             %
 326 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 327 %
 328 %  UnregisterEPTImage() removes format registrations made by the
 329 %  EPT module from the list of supported formats.
 330 %
 331 %  The format of the UnregisterEPTImage method is:
 332 %
 333 %      UnregisterEPTImage(void)
 334 %
 335 */
 336 ModuleExport void UnregisterEPTImage(void)
 337 {
 338   (void) UnregisterMagickInfo("EPT");
 339 }
 340 \f
 341 /*
 342 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 343 %                                                                             %
 344 %                                                                             %
 345 %                                                                             %
 346 %   W r i t e E P T I m a g e                                                 %
 347 %                                                                             %
 348 %                                                                             %
 349 %                                                                             %
 350 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 351 %
 352 %  WriteEPTImage() writes an image in the Encapsulated Postscript format
 353 %  with a TIFF preview.
 354 %
 355 %  The format of the WriteEPTImage method is:
 356 %
 357 %      MagickBooleanType WriteEPTImage(const ImageInfo *image_info,
 358 %        Image *image,ExceptionInfo *exception)
 359 %
 360 %  A description of each parameter follows.
 361 %
 362 %    o image_info: the image info.
 363 %
 364 %    o image:  The image.
 365 %
 366 %    o exception: return any errors or warnings in this structure.
 367 %
 368 */
 369 static MagickBooleanType WriteEPTImage(const ImageInfo *image_info,Image *image,
 370   ExceptionInfo *exception)
 371 {
 372   char
 373      filename[MaxTextExtent];
 374
 375   EPTInfo
 376     ept_info;
 377
 378   Image
 379     *write_image;
 380
 381   ImageInfo
 382     *write_info;
 383
 384   MagickBooleanType
 385     status;
 386
 387   /*
 388     Write EPT image.
 389   */
 390   assert(image_info != (const ImageInfo *) NULL);
 391   assert(image_info->signature == MagickSignature);
 392   assert(image != (Image *) NULL);
 393   assert(image->signature == MagickSignature);
 394   if (image->debug != MagickFalse)
 395     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
 396   assert(exception != (ExceptionInfo *) NULL);
 397   assert(exception->signature == MagickSignature);
 398   status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception);
 399   if (status == MagickFalse)
 400     return(status);
 401   write_image=CloneImage(image,0,0,MagickTrue,exception);
 402   if (write_image == (Image *) NULL)
 403     return(MagickFalse);
 404   write_info=CloneImageInfo(image_info);
 405   (void) CopyMagickString(write_info->magick,"EPS",MaxTextExtent);
 406   if (LocaleCompare(image_info->magick,"EPT2") == 0)
 407     (void) CopyMagickString(write_info->magick,"EPS2",MaxTextExtent);
 408   if (LocaleCompare(image_info->magick,"EPT3") == 0)
 409     (void) CopyMagickString(write_info->magick,"EPS3",MaxTextExtent);
 410   (void) ResetMagickMemory(&ept_info,0,sizeof(ept_info));
 411   ept_info.magick=0xc6d3d0c5ul;
 412   ept_info.postscript=(unsigned char *) ImageToBlob(write_info,write_image,
 413     &ept_info.postscript_length,exception);
 414   write_image=DestroyImage(write_image);
 415   write_info=DestroyImageInfo(write_info);
 416   if (ept_info.postscript == (void *) NULL)
 417     return(MagickFalse);
 418   write_image=CloneImage(image,0,0,MagickTrue,exception);
 419   if (write_image == (Image *) NULL)
 420     return(MagickFalse);
 421   write_info=CloneImageInfo(image_info);
 422   (void) CopyMagickString(write_info->magick,"TIFF",MaxTextExtent);
 423   (void) FormatLocaleString(filename,MaxTextExtent,"tiff:%s",
 424     write_info->filename);
 425   (void) CopyMagickString(write_info->filename,filename,MaxTextExtent);
 426   (void) TransformImage(&write_image,(char *) NULL,"512x512>",exception);
 427   if ((write_image->storage_class == DirectClass) ||
 428       (write_image->colors > 256))
 429     {
 430       QuantizeInfo
 431         quantize_info;
 432
 433       /*
 434         EPT preview requires that the image is colormapped.
 435       */
 436       GetQuantizeInfo(&quantize_info);
 437       quantize_info.dither_method=IsPaletteImage(write_image,exception) ==
 438         MagickFalse ? RiemersmaDitherMethod : NoDitherMethod;
 439       (void) QuantizeImage(&quantize_info,write_image,exception);
 440     }
 441   write_info->compression=NoCompression;
 442   ept_info.tiff=(unsigned char *) ImageToBlob(write_info,write_image,
 443     &ept_info.tiff_length,exception);
 444   write_image=DestroyImage(write_image);
 445   write_info=DestroyImageInfo(write_info);
 446   if (ept_info.tiff == (void *) NULL)
 447     {
 448       ept_info.postscript=(unsigned char *) RelinquishMagickMemory(
 449         ept_info.postscript);
 450       return(MagickFalse);
 451     }
 452   /*
 453     Write EPT image.
 454   */
 455   (void) WriteBlobLSBLong(image,(unsigned int) ept_info.magick);
 456   (void) WriteBlobLSBLong(image,30);
 457   (void) WriteBlobLSBLong(image,(unsigned int) ept_info.postscript_length);
 458   (void) WriteBlobLSBLong(image,0);
 459   (void) WriteBlobLSBLong(image,0);
 460   (void) WriteBlobLSBLong(image,(unsigned int) ept_info.postscript_length+30);
 461   (void) WriteBlobLSBLong(image,(unsigned int) ept_info.tiff_length);
 462   (void) WriteBlobLSBShort(image,0xffff);
 463   (void) WriteBlob(image,ept_info.postscript_length,ept_info.postscript);
 464   (void) WriteBlob(image,ept_info.tiff_length,ept_info.tiff);
 465   /*
 466     Relinquish resources.
 467   */
 468   ept_info.postscript=(unsigned char *) RelinquishMagickMemory(
 469     ept_info.postscript);
 470   ept_info.tiff=(unsigned char *) RelinquishMagickMemory(ept_info.tiff);
 471   (void) CloseBlob(image);
 472   return(MagickTrue);
 473 }