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 1999-2011 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/color.h"
  46 #include "magick/constitute.h"
  47 #include "magick/draw.h"
  48 #include "magick/exception.h"
  49 #include "magick/exception-private.h"
  50 #include "magick/delegate.h"
  51 #include "magick/geometry.h"
  52 #include "magick/histogram.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/quantize.h"
  61 #include "magick/resource_.h"
  62 #include "magick/quantum-private.h"
  63 #include "magick/static.h"
  64 #include "magick/string_.h"
  65 #include "magick/module.h"
  66 #include "magick/transform.h"
  67 #include "magick/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 *);
  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);
 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,Image *image)
 354 %
 355 %  A description of each parameter follows.
 356 %
 357 %    o image_info: the image info.
 358 %
 359 %    o image:  The image.
 360 %
 361 */
 362 static MagickBooleanType WriteEPTImage(const ImageInfo *image_info,Image *image)
 363 {
 364   char
 365      filename[MaxTextExtent];
 366
 367   EPTInfo
 368     ept_info;
 369
 370   Image
 371     *write_image;
 372
 373   ImageInfo
 374     *write_info;
 375
 376   MagickBooleanType
 377     status;
 378
 379   /*
 380     Write EPT image.
 381   */
 382   assert(image_info != (const ImageInfo *) NULL);
 383   assert(image_info->signature == MagickSignature);
 384   assert(image != (Image *) NULL);
 385   assert(image->signature == MagickSignature);
 386   if (image->debug != MagickFalse)
 387     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
 388   status=OpenBlob(image_info,image,WriteBinaryBlobMode,&image->exception);
 389   if (status == MagickFalse)
 390     return(status);
 391   write_image=CloneImage(image,0,0,MagickTrue,&image->exception);
 392   if (write_image == (Image *) NULL)
 393     return(MagickFalse);
 394   write_info=CloneImageInfo(image_info);
 395   (void) CopyMagickString(write_info->magick,"EPS",MaxTextExtent);
 396   if (LocaleCompare(image_info->magick,"EPT2") == 0)
 397     (void) CopyMagickString(write_info->magick,"EPS2",MaxTextExtent);
 398   if (LocaleCompare(image_info->magick,"EPT3") == 0)
 399     (void) CopyMagickString(write_info->magick,"EPS3",MaxTextExtent);
 400   (void) ResetMagickMemory(&ept_info,0,sizeof(ept_info));
 401   ept_info.magick=0xc6d3d0c5ul;
 402   ept_info.postscript=(unsigned char *) ImageToBlob(write_info,write_image,
 403     &ept_info.postscript_length,&image->exception);
 404   write_image=DestroyImage(write_image);
 405   write_info=DestroyImageInfo(write_info);
 406   if (ept_info.postscript == (void *) NULL)
 407     return(MagickFalse);
 408   write_image=CloneImage(image,0,0,MagickTrue,&image->exception);
 409   if (write_image == (Image *) NULL)
 410     return(MagickFalse);
 411   write_info=CloneImageInfo(image_info);
 412   (void) CopyMagickString(write_info->magick,"TIFF",MaxTextExtent);
 413   (void) FormatMagickString(filename,MaxTextExtent,"tiff:%s",
 414     write_info->filename);
 415   (void) CopyMagickString(write_info->filename,filename,MaxTextExtent);
 416   (void) TransformImage(&write_image,(char *) NULL,"512x512>");
 417   if ((write_image->storage_class == DirectClass) ||
 418       (write_image->colors > 256))
 419     {
 420       QuantizeInfo
 421         quantize_info;
 422
 423       /*
 424         EPT preview requires that the image is colormapped.
 425       */
 426       GetQuantizeInfo(&quantize_info);
 427       quantize_info.dither=IsPaletteImage(write_image,&image->exception) ==
 428         MagickFalse ? MagickTrue : MagickFalse;
 429       (void) QuantizeImage(&quantize_info,write_image);
 430     }
 431   write_info->compression=NoCompression;
 432   ept_info.tiff=(unsigned char *) ImageToBlob(write_info,write_image,
 433     &ept_info.tiff_length,&image->exception);
 434   write_image=DestroyImage(write_image);
 435   write_info=DestroyImageInfo(write_info);
 436   if (ept_info.tiff == (void *) NULL)
 437     {
 438       ept_info.postscript=(unsigned char *) RelinquishMagickMemory(
 439         ept_info.postscript);
 440       return(MagickFalse);
 441     }
 442   /*
 443     Write EPT image.
 444   */
 445   (void) WriteBlobLSBLong(image,(unsigned int) ept_info.magick);
 446   (void) WriteBlobLSBLong(image,30);
 447   (void) WriteBlobLSBLong(image,(unsigned int) ept_info.postscript_length);
 448   (void) WriteBlobLSBLong(image,0);
 449   (void) WriteBlobLSBLong(image,0);
 450   (void) WriteBlobLSBLong(image,(unsigned int) ept_info.postscript_length+30);
 451   (void) WriteBlobLSBLong(image,(unsigned int) ept_info.tiff_length);
 452   (void) WriteBlobLSBShort(image,0xffff);
 453   (void) WriteBlob(image,ept_info.postscript_length,ept_info.postscript);
 454   (void) WriteBlob(image,ept_info.tiff_length,ept_info.tiff);
 455   /*
 456     Relinquish resources.
 457   */
 458   ept_info.postscript=(unsigned char *) RelinquishMagickMemory(
 459     ept_info.postscript);
 460   ept_info.tiff=(unsigned char *) RelinquishMagickMemory(ept_info.tiff);
 461   (void) CloseBlob(image);
 462   return(MagickTrue);
 463 }