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 %                                John Cristy                                  %
  17 %                                 July 1992                                   %
  18 %                                                                             %
  19 %                                                                             %
  20 %  Copyright 1999-2012 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     (void) CopyMagickString(image->filename,image_info->filename,MaxTextExtent);
 244   ept_info.tiff=(unsigned char *) RelinquishMagickMemory(ept_info.tiff);
 245   ept_info.postscript=(unsigned char *) RelinquishMagickMemory(
 246     ept_info.postscript);
 247   return(image);
 248 }
 249 \f
 250 /*
 251 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 252 %                                                                             %
 253 %                                                                             %
 254 %                                                                             %
 255 %   R e g i s t e r E P T I m a g e                                           %
 256 %                                                                             %
 257 %                                                                             %
 258 %                                                                             %
 259 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 260 %
 261 %  RegisterEPTImage() adds attributes for the EPT image format to
 262 %  the list of supported formats.  The attributes include the image format
 263 %  tag, a method to read and/or write the format, whether the format
 264 %  supports the saving of more than one frame to the same file or blob,
 265 %  whether the format supports native in-memory I/O, and a brief
 266 %  description of the format.
 267 %
 268 %  The format of the RegisterEPTImage method is:
 269 %
 270 %      size_t RegisterEPTImage(void)
 271 %
 272 */
 273 ModuleExport size_t RegisterEPTImage(void)
 274 {
 275   MagickInfo
 276     *entry;
 277
 278   entry=SetMagickInfo("EPT");
 279   entry->decoder=(DecodeImageHandler *) ReadEPTImage;
 280   entry->encoder=(EncodeImageHandler *) WriteEPTImage;
 281   entry->magick=(IsImageFormatHandler *) IsEPT;
 282   entry->seekable_stream=MagickTrue;
 283   entry->adjoin=MagickFalse;
 284   entry->blob_support=MagickFalse;
 285   entry->description=ConstantString(
 286     "Encapsulated PostScript with TIFF preview");
 287   entry->module=ConstantString("EPT");
 288   (void) RegisterMagickInfo(entry);
 289   entry=SetMagickInfo("EPT2");
 290   entry->decoder=(DecodeImageHandler *) ReadEPTImage;
 291   entry->encoder=(EncodeImageHandler *) WriteEPTImage;
 292   entry->magick=(IsImageFormatHandler *) IsEPT;
 293   entry->adjoin=MagickFalse;
 294   entry->seekable_stream=MagickTrue;
 295   entry->blob_support=MagickFalse;
 296   entry->description=ConstantString(
 297     "Encapsulated PostScript Level II with TIFF preview");
 298   entry->module=ConstantString("EPT");
 299   (void) RegisterMagickInfo(entry);
 300   entry=SetMagickInfo("EPT3");
 301   entry->decoder=(DecodeImageHandler *) ReadEPTImage;
 302   entry->encoder=(EncodeImageHandler *) WriteEPTImage;
 303   entry->magick=(IsImageFormatHandler *) IsEPT;
 304   entry->seekable_stream=MagickTrue;
 305   entry->blob_support=MagickFalse;
 306   entry->description=ConstantString(
 307     "Encapsulated PostScript Level III with TIFF preview");
 308   entry->module=ConstantString("EPT");
 309   (void) RegisterMagickInfo(entry);
 310   return(MagickImageCoderSignature);
 311 }
 312 \f
 313 /*
 314 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 315 %                                                                             %
 316 %                                                                             %
 317 %                                                                             %
 318 %   U n r e g i s t e r E P T I m a g e                                       %
 319 %                                                                             %
 320 %                                                                             %
 321 %                                                                             %
 322 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 323 %
 324 %  UnregisterEPTImage() removes format registrations made by the
 325 %  EPT module from the list of supported formats.
 326 %
 327 %  The format of the UnregisterEPTImage method is:
 328 %
 329 %      UnregisterEPTImage(void)
 330 %
 331 */
 332 ModuleExport void UnregisterEPTImage(void)
 333 {
 334   (void) UnregisterMagickInfo("EPT");
 335 }
 336 \f
 337 /*
 338 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 339 %                                                                             %
 340 %                                                                             %
 341 %                                                                             %
 342 %   W r i t e E P T I m a g e                                                 %
 343 %                                                                             %
 344 %                                                                             %
 345 %                                                                             %
 346 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 347 %
 348 %  WriteEPTImage() writes an image in the Encapsulated Postscript format
 349 %  with a TIFF preview.
 350 %
 351 %  The format of the WriteEPTImage method is:
 352 %
 353 %      MagickBooleanType WriteEPTImage(const ImageInfo *image_info,
 354 %        Image *image,ExceptionInfo *exception)
 355 %
 356 %  A description of each parameter follows.
 357 %
 358 %    o image_info: the image info.
 359 %
 360 %    o image:  The image.
 361 %
 362 %    o exception: return any errors or warnings in this structure.
 363 %
 364 */
 365 static MagickBooleanType WriteEPTImage(const ImageInfo *image_info,Image *image,
 366   ExceptionInfo *exception)
 367 {
 368   char
 369      filename[MaxTextExtent];
 370
 371   EPTInfo
 372     ept_info;
 373
 374   Image
 375     *write_image;
 376
 377   ImageInfo
 378     *write_info;
 379
 380   MagickBooleanType
 381     status;
 382
 383   /*
 384     Write EPT image.
 385   */
 386   assert(image_info != (const ImageInfo *) NULL);
 387   assert(image_info->signature == MagickSignature);
 388   assert(image != (Image *) NULL);
 389   assert(image->signature == MagickSignature);
 390   if (image->debug != MagickFalse)
 391     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
 392   assert(exception != (ExceptionInfo *) NULL);
 393   assert(exception->signature == MagickSignature);
 394   status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception);
 395   if (status == MagickFalse)
 396     return(status);
 397   write_image=CloneImage(image,0,0,MagickTrue,exception);
 398   if (write_image == (Image *) NULL)
 399     return(MagickFalse);
 400   write_info=CloneImageInfo(image_info);
 401   (void) CopyMagickString(write_info->magick,"EPS",MaxTextExtent);
 402   if (LocaleCompare(image_info->magick,"EPT2") == 0)
 403     (void) CopyMagickString(write_info->magick,"EPS2",MaxTextExtent);
 404   if (LocaleCompare(image_info->magick,"EPT3") == 0)
 405     (void) CopyMagickString(write_info->magick,"EPS3",MaxTextExtent);
 406   (void) ResetMagickMemory(&ept_info,0,sizeof(ept_info));
 407   ept_info.magick=0xc6d3d0c5ul;
 408   ept_info.postscript=(unsigned char *) ImageToBlob(write_info,write_image,
 409     &ept_info.postscript_length,exception);
 410   write_image=DestroyImage(write_image);
 411   write_info=DestroyImageInfo(write_info);
 412   if (ept_info.postscript == (void *) NULL)
 413     return(MagickFalse);
 414   write_image=CloneImage(image,0,0,MagickTrue,exception);
 415   if (write_image == (Image *) NULL)
 416     return(MagickFalse);
 417   write_info=CloneImageInfo(image_info);
 418   (void) CopyMagickString(write_info->magick,"TIFF",MaxTextExtent);
 419   (void) FormatLocaleString(filename,MaxTextExtent,"tiff:%s",
 420     write_info->filename);
 421   (void) CopyMagickString(write_info->filename,filename,MaxTextExtent);
 422   (void) TransformImage(&write_image,(char *) NULL,"512x512>",exception);
 423   if ((write_image->storage_class == DirectClass) ||
 424       (write_image->colors > 256))
 425     {
 426       QuantizeInfo
 427         quantize_info;
 428
 429       /*
 430         EPT preview requires that the image is colormapped.
 431       */
 432       GetQuantizeInfo(&quantize_info);
 433       quantize_info.dither_method=IsPaletteImage(write_image,exception) ==
 434         MagickFalse ? RiemersmaDitherMethod : NoDitherMethod;
 435       (void) QuantizeImage(&quantize_info,write_image,exception);
 436     }
 437   write_info->compression=NoCompression;
 438   ept_info.tiff=(unsigned char *) ImageToBlob(write_info,write_image,
 439     &ept_info.tiff_length,exception);
 440   write_image=DestroyImage(write_image);
 441   write_info=DestroyImageInfo(write_info);
 442   if (ept_info.tiff == (void *) NULL)
 443     {
 444       ept_info.postscript=(unsigned char *) RelinquishMagickMemory(
 445         ept_info.postscript);
 446       return(MagickFalse);
 447     }
 448   /*
 449     Write EPT image.
 450   */
 451   (void) WriteBlobLSBLong(image,(unsigned int) ept_info.magick);
 452   (void) WriteBlobLSBLong(image,30);
 453   (void) WriteBlobLSBLong(image,(unsigned int) ept_info.postscript_length);
 454   (void) WriteBlobLSBLong(image,0);
 455   (void) WriteBlobLSBLong(image,0);
 456   (void) WriteBlobLSBLong(image,(unsigned int) ept_info.postscript_length+30);
 457   (void) WriteBlobLSBLong(image,(unsigned int) ept_info.tiff_length);
 458   (void) WriteBlobLSBShort(image,0xffff);
 459   (void) WriteBlob(image,ept_info.postscript_length,ept_info.postscript);
 460   (void) WriteBlob(image,ept_info.tiff_length,ept_info.tiff);
 461   /*
 462     Relinquish resources.
 463   */
 464   ept_info.postscript=(unsigned char *) RelinquishMagickMemory(
 465     ept_info.postscript);
 466   ept_info.tiff=(unsigned char *) RelinquishMagickMemory(ept_info.tiff);
 467   (void) CloseBlob(image);
 468   return(MagickTrue);
 469 }