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 1999-2009 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   unsigned long
  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   ssize_t
 169     count;
 170
 171   MagickBooleanType
 172     status;
 173
 174   MagickOffsetType
 175     offset;
 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,sizeof(*ept_info.postscript));
 206   if (ept_info.postscript == (unsigned char *) NULL)
 207     ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 208   ept_info.tiff=(unsigned char *) AcquireQuantumMemory(ept_info.tiff_length,
 209     sizeof(*ept_info.tiff));
 210   if ((ept_info.tiff_length != 0) && (ept_info.tiff == (unsigned char *) NULL))
 211     ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 212   offset=SeekBlob(image,ept_info.tiff_offset,SEEK_SET);
 213   if (offset < 0)
 214     ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 215   count=ReadBlob(image,ept_info.tiff_length,ept_info.tiff);
 216   if (count != (ssize_t) (ept_info.tiff_length))
 217     ThrowReaderException(CorruptImageError,"InsufficientImageDataInFile");
 218   offset=SeekBlob(image,ept_info.postscript_offset,SEEK_SET);
 219   if (offset < 0)
 220     ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 221   count=ReadBlob(image,ept_info.postscript_length,ept_info.postscript);
 222   if (count != (ssize_t) (ept_info.postscript_length))
 223     ThrowReaderException(CorruptImageError,"InsufficientImageDataInFile");
 224   (void) CloseBlob(image);
 225   image=DestroyImage(image);
 226   read_info=CloneImageInfo(image_info);
 227   (void) CopyMagickString(read_info->magick,"EPS",MaxTextExtent);
 228   image=BlobToImage(read_info,ept_info.postscript,ept_info.postscript_length,
 229     exception);
 230   if (image == (Image *) NULL)
 231     {
 232       (void) CopyMagickString(read_info->magick,"TIFF",MaxTextExtent);
 233       image=BlobToImage(read_info,ept_info.tiff,ept_info.tiff_length,exception);
 234     }
 235   read_info=DestroyImageInfo(read_info);
 236   if (image != (Image *) NULL)
 237     (void) CopyMagickString(image->filename,image_info->filename,MaxTextExtent);
 238   ept_info.tiff=(unsigned char *) RelinquishMagickMemory(ept_info.tiff);
 239   ept_info.postscript=(unsigned char *) RelinquishMagickMemory(
 240     ept_info.postscript);
 241   return(image);
 242 }
 243 \f
 244 /*
 245 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 246 %                                                                             %
 247 %                                                                             %
 248 %                                                                             %
 249 %   R e g i s t e r E P T I m a g e                                           %
 250 %                                                                             %
 251 %                                                                             %
 252 %                                                                             %
 253 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 254 %
 255 %  RegisterEPTImage() adds attributes for the EPT image format to
 256 %  the list of supported formats.  The attributes include the image format
 257 %  tag, a method to read and/or write the format, whether the format
 258 %  supports the saving of more than one frame to the same file or blob,
 259 %  whether the format supports native in-memory I/O, and a brief
 260 %  description of the format.
 261 %
 262 %  The format of the RegisterEPTImage method is:
 263 %
 264 %      unsigned long RegisterEPTImage(void)
 265 %
 266 */
 267 ModuleExport unsigned long RegisterEPTImage(void)
 268 {
 269   MagickInfo
 270     *entry;
 271
 272   entry=SetMagickInfo("EPT");
 273   entry->decoder=(DecodeImageHandler *) ReadEPTImage;
 274   entry->encoder=(EncodeImageHandler *) WriteEPTImage;
 275   entry->magick=(IsImageFormatHandler *) IsEPT;
 276   entry->adjoin=MagickFalse;
 277   entry->blob_support=MagickFalse;
 278   entry->description=ConstantString(
 279     "Encapsulated PostScript with TIFF preview");
 280   entry->module=ConstantString("EPT");
 281   (void) RegisterMagickInfo(entry);
 282   entry=SetMagickInfo("EPT2");
 283   entry->decoder=(DecodeImageHandler *) ReadEPTImage;
 284   entry->encoder=(EncodeImageHandler *) WriteEPTImage;
 285   entry->magick=(IsImageFormatHandler *) IsEPT;
 286   entry->adjoin=MagickFalse;
 287   entry->blob_support=MagickFalse;
 288   entry->description=ConstantString(
 289     "Encapsulated PostScript Level II with TIFF preview");
 290   entry->module=ConstantString("EPT");
 291   (void) RegisterMagickInfo(entry);
 292   entry=SetMagickInfo("EPT3");
 293   entry->decoder=(DecodeImageHandler *) ReadEPTImage;
 294   entry->encoder=(EncodeImageHandler *) WriteEPTImage;
 295   entry->magick=(IsImageFormatHandler *) IsEPT;
 296   entry->blob_support=MagickFalse;
 297   entry->description=ConstantString(
 298     "Encapsulated PostScript Level III with TIFF preview");
 299   entry->module=ConstantString("EPT");
 300   (void) RegisterMagickInfo(entry);
 301   return(MagickImageCoderSignature);
 302 }
 303 \f
 304 /*
 305 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 306 %                                                                             %
 307 %                                                                             %
 308 %                                                                             %
 309 %   U n r e g i s t e r E P T I m a g e                                       %
 310 %                                                                             %
 311 %                                                                             %
 312 %                                                                             %
 313 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 314 %
 315 %  UnregisterEPTImage() removes format registrations made by the
 316 %  EPT module from the list of supported formats.
 317 %
 318 %  The format of the UnregisterEPTImage method is:
 319 %
 320 %      UnregisterEPTImage(void)
 321 %
 322 */
 323 ModuleExport void UnregisterEPTImage(void)
 324 {
 325   (void) UnregisterMagickInfo("EPT");
 326 }
 327 \f
 328 /*
 329 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 330 %                                                                             %
 331 %                                                                             %
 332 %                                                                             %
 333 %   W r i t e E P T I m a g e                                                 %
 334 %                                                                             %
 335 %                                                                             %
 336 %                                                                             %
 337 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 338 %
 339 %  WriteEPTImage() writes an image in the Encapsulated Postscript format
 340 %  with a TIFF preview.
 341 %
 342 %  The format of the WriteEPTImage method is:
 343 %
 344 %      MagickBooleanType WriteEPTImage(const ImageInfo *image_info,Image *image)
 345 %
 346 %  A description of each parameter follows.
 347 %
 348 %    o image_info: the image info.
 349 %
 350 %    o image:  The image.
 351 %
 352 */
 353 static MagickBooleanType WriteEPTImage(const ImageInfo *image_info,Image *image)
 354 {
 355   char
 356      filename[MaxTextExtent];
 357
 358   EPTInfo
 359     ept_info;
 360
 361   Image
 362     *write_image;
 363
 364   ImageInfo
 365     *write_info;
 366
 367   MagickBooleanType
 368     status;
 369
 370   /*
 371     Write EPT image.
 372   */
 373   assert(image_info != (const ImageInfo *) NULL);
 374   assert(image_info->signature == MagickSignature);
 375   assert(image != (Image *) NULL);
 376   assert(image->signature == MagickSignature);
 377   if (image->debug != MagickFalse)
 378     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
 379   status=OpenBlob(image_info,image,WriteBinaryBlobMode,&image->exception);
 380   if (status == MagickFalse)
 381     return(status);
 382   write_image=CloneImage(image,0,0,MagickTrue,&image->exception);
 383   if (write_image == (Image *) NULL)
 384     return(MagickFalse);
 385   write_info=CloneImageInfo(image_info);
 386   (void) CopyMagickString(write_info->magick,"EPS",MaxTextExtent);
 387   if (LocaleCompare(image_info->magick,"EPT2") == 0)
 388     (void) CopyMagickString(write_info->magick,"EPS2",MaxTextExtent);
 389   if (LocaleCompare(image_info->magick,"EPT3") == 0)
 390     (void) CopyMagickString(write_info->magick,"EPS3",MaxTextExtent);
 391   (void) ResetMagickMemory(&ept_info,0,sizeof(ept_info));
 392   ept_info.magick=0xc6d3d0c5ul;
 393   ept_info.postscript=(unsigned char *) ImageToBlob(write_info,write_image,
 394     &ept_info.postscript_length,&image->exception);
 395   write_image=DestroyImage(write_image);
 396   write_info=DestroyImageInfo(write_info);
 397   if (ept_info.postscript == (void *) NULL)
 398     return(MagickFalse);
 399   write_image=CloneImage(image,0,0,MagickTrue,&image->exception);
 400   if (write_image == (Image *) NULL)
 401     return(MagickFalse);
 402   write_info=CloneImageInfo(image_info);
 403   (void) CopyMagickString(write_info->magick,"TIFF",MaxTextExtent);
 404   (void) FormatMagickString(filename,MaxTextExtent,"tiff:%.1024s",
 405     write_info->filename);
 406   (void) CopyMagickString(write_info->filename,filename,MaxTextExtent);
 407   (void) TransformImage(&write_image,(char *) NULL,"512x512>");
 408   if ((write_image->storage_class == DirectClass) ||
 409       (write_image->colors > 256))
 410     {
 411       QuantizeInfo
 412         quantize_info;
 413
 414       /*
 415         EPT preview requires that the image is colormapped.
 416       */
 417       GetQuantizeInfo(&quantize_info);
 418       quantize_info.dither=IsPaletteImage(write_image,&image->exception) ==
 419         MagickFalse ? MagickTrue : MagickFalse;
 420       (void) QuantizeImage(&quantize_info,write_image);
 421     }
 422   write_info->compression=NoCompression;
 423   ept_info.tiff=(unsigned char *) ImageToBlob(write_info,write_image,
 424     &ept_info.tiff_length,&image->exception);
 425   write_image=DestroyImage(write_image);
 426   write_info=DestroyImageInfo(write_info);
 427   if (ept_info.tiff == (void *) NULL)
 428     {
 429       ept_info.postscript=(unsigned char *) RelinquishMagickMemory(
 430         ept_info.postscript);
 431       return(MagickFalse);
 432     }
 433   /*
 434     Write EPT image.
 435   */
 436   (void) WriteBlobLSBLong(image,(unsigned int) ept_info.magick);
 437   (void) WriteBlobLSBLong(image,30);
 438   (void) WriteBlobLSBLong(image,(unsigned int) ept_info.postscript_length);
 439   (void) WriteBlobLSBLong(image,0);
 440   (void) WriteBlobLSBLong(image,0);
 441   (void) WriteBlobLSBLong(image,(unsigned int) ept_info.postscript_length+30);
 442   (void) WriteBlobLSBLong(image,(unsigned int) ept_info.tiff_length);
 443   (void) WriteBlobLSBShort(image,0xffff);
 444   (void) WriteBlob(image,ept_info.postscript_length,ept_info.postscript);
 445   (void) WriteBlob(image,ept_info.tiff_length,ept_info.tiff);
 446   /*
 447     Relinquish resources.
 448   */
 449   ept_info.postscript=(unsigned char *) RelinquishMagickMemory(
 450     ept_info.postscript);
 451   ept_info.tiff=(unsigned char *) RelinquishMagickMemory(ept_info.tiff);
 452   (void) CloseBlob(image);
 453   return(MagickTrue);
 454 }