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 1999-2019 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://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 39 /* 41 Include declarations. 42 */ 43 #include "MagickCore/studio.h" 44 #include "MagickCore/blob.h" 45 #include "MagickCore/blob-private.h" 46 #include "MagickCore/color.h" 47 #include "MagickCore/constitute.h" 48 #include "MagickCore/draw.h" 49 #include "MagickCore/exception.h" 50 #include "MagickCore/exception-private.h" 51 #include "MagickCore/delegate.h" 52 #include "MagickCore/geometry.h" 53 #include "MagickCore/histogram.h" 54 #include "MagickCore/image.h" 55 #include "MagickCore/image-private.h" 56 #include "MagickCore/list.h" 57 #include "MagickCore/magick.h" 58 #include "MagickCore/memory_.h" 59 #include "MagickCore/monitor.h" 60 #include "MagickCore/monitor-private.h" 61 #include "MagickCore/quantize.h" 62 #include "MagickCore/resource_.h" 63 #include "MagickCore/resize.h" 64 #include "MagickCore/quantum-private.h" 65 #include "MagickCore/static.h" 66 #include "MagickCore/string_.h" 67 #include "MagickCore/module.h" 68 #include "MagickCore/utility.h" 69 70 /* 72 Typedef declarations. 73 */ 74 typedef struct _EPTInfo 75 { 76 size_t 77 magick; 78 79 MagickOffsetType 80 postscript_offset, 81 tiff_offset; 82 83 size_t 84 postscript_length, 85 tiff_length; 86 87 unsigned char 88 *postscript, 89 *tiff; 90 } EPTInfo; 91 92 /* 94 Forward declarations. 95 */ 96 static MagickBooleanType 97 WriteEPTImage(const ImageInfo *,Image *,ExceptionInfo *); 98 99 /* 101 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 102 % % 103 % % 104 % % 105 % I s E P T % 106 % % 107 % % 108 % % 109 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 110 % 111 % IsEPT() returns MagickTrue if the image format type, identified by the 112 % magick string, is EPT. 113 % 114 % The format of the IsEPT method is: 115 % 116 % MagickBooleanType IsEPT(const unsigned char *magick,const size_t length) 117 % 118 % A description of each parameter follows: 119 % 120 % o magick: compare image format pattern against these bytes. 121 % 122 % o length: Specifies the length of the magick string. 123 % 124 */ 125 static MagickBooleanType IsEPT(const unsigned char *magick,const size_t length) 126 { 127 if (length < 4) 128 return(MagickFalse); 129 if (memcmp(magick,"\305\320\323\306",4) == 0) 130 return(MagickTrue); 131 return(MagickFalse); 132 } 133 134 /* 136 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 137 % % 138 % % 139 % % 140 % R e a d E P T I m a g e % 141 % % 142 % % 143 % % 144 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 145 % 146 % ReadEPTImage() reads a binary Postscript image file and returns it. It 147 % allocates the memory necessary for the new Image structure and returns a 148 % pointer to the new image. 149 % 150 % The format of the ReadEPTImage method is: 151 % 152 % Image *ReadEPTImage(const ImageInfo *image_info, 153 % ExceptionInfo *exception) 154 % 155 % A description of each parameter follows: 156 % 157 % o image_info: the image info. 158 % 159 % o exception: return any errors or warnings in this structure. 160 % 161 */ 162 static Image *ReadEPTImage(const ImageInfo *image_info,ExceptionInfo *exception) 163 { 164 EPTInfo 165 ept_info; 166 167 Image 168 *image; 169 170 ImageInfo 171 *read_info; 172 173 MagickBooleanType 174 status; 175 176 MagickOffsetType 177 offset; 178 179 ssize_t 180 count; 181 182 /* 183 Open image file. 184 */ 185 assert(image_info != (const ImageInfo *) NULL); 186 assert(image_info->signature == MagickCoreSignature); 187 if (image_info->debug != MagickFalse) 188 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s", 189 image_info->filename); 190 assert(exception != (ExceptionInfo *) NULL); 191 assert(exception->signature == MagickCoreSignature); 192 image=AcquireImage(image_info,exception); 193 status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception); 194 if (status == MagickFalse) 195 { 196 image=DestroyImageList(image); 197 return((Image *) NULL); 198 } 199 ept_info.magick=ReadBlobLSBLong(image); 200 if (ept_info.magick != 0xc6d3d0c5ul) 201 ThrowReaderException(CorruptImageError,"ImproperImageHeader"); 202 ept_info.postscript_offset=(MagickOffsetType) ReadBlobLSBLong(image); 203 ept_info.postscript_length=ReadBlobLSBLong(image); 204 if (ept_info.postscript_length > GetBlobSize(image)) 205 ThrowReaderException(CorruptImageError,"InsufficientImageDataInFile"); 206 (void) ReadBlobLSBLong(image); 207 (void) ReadBlobLSBLong(image); 208 ept_info.tiff_offset=(MagickOffsetType) ReadBlobLSBLong(image); 209 ept_info.tiff_length=ReadBlobLSBLong(image); 210 if (ept_info.tiff_length > GetBlobSize(image)) 211 ThrowReaderException(CorruptImageError,"InsufficientImageDataInFile"); 212 (void) ReadBlobLSBShort(image); 213 ept_info.postscript=(unsigned char *) AcquireQuantumMemory( 214 ept_info.postscript_length+1,sizeof(*ept_info.postscript)); 215 if (ept_info.postscript == (unsigned char *) NULL) 216 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed"); 217 (void) memset(ept_info.postscript,0,(ept_info.postscript_length+1)* 218 sizeof(*ept_info.postscript)); 219 ept_info.tiff=(unsigned char *) AcquireQuantumMemory(ept_info.tiff_length+1, 220 sizeof(*ept_info.tiff)); 221 if (ept_info.tiff == (unsigned char *) NULL) 222 { 223 ept_info.postscript=(unsigned char *) RelinquishMagickMemory( 224 ept_info.postscript); 225 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed"); 226 } 227 (void) memset(ept_info.tiff,0,(ept_info.tiff_length+1)* 228 sizeof(*ept_info.tiff)); 229 offset=SeekBlob(image,ept_info.tiff_offset,SEEK_SET); 230 if ((ept_info.tiff_length != 0) && (offset < 30)) 231 { 232 ept_info.tiff=(unsigned char *) RelinquishMagickMemory(ept_info.tiff); 233 ept_info.postscript=(unsigned char *) RelinquishMagickMemory( 234 ept_info.postscript); 235 ThrowReaderException(CorruptImageError,"ImproperImageHeader"); 236 } 237 count=ReadBlob(image,ept_info.tiff_length,ept_info.tiff); 238 if (count != (ssize_t) (ept_info.tiff_length)) 239 (void) ThrowMagickException(exception,GetMagickModule(),CorruptImageWarning, 240 "InsufficientImageDataInFile","`%s'",image->filename); 241 offset=SeekBlob(image,ept_info.postscript_offset,SEEK_SET); 242 if ((ept_info.postscript_length != 0) && (offset < 30)) 243 { 244 ept_info.tiff=(unsigned char *) RelinquishMagickMemory(ept_info.tiff); 245 ept_info.postscript=(unsigned char *) RelinquishMagickMemory( 246 ept_info.postscript); 247 ThrowReaderException(CorruptImageError,"ImproperImageHeader"); 248 } 249 count=ReadBlob(image,ept_info.postscript_length,ept_info.postscript); 250 if (count != (ssize_t) (ept_info.postscript_length)) 251 (void) ThrowMagickException(exception,GetMagickModule(),CorruptImageWarning, 252 "InsufficientImageDataInFile","`%s'",image->filename); 253 (void) CloseBlob(image); 254 image=DestroyImage(image); 255 read_info=CloneImageInfo(image_info); 256 (void) CopyMagickString(read_info->magick,"EPS",MagickPathExtent); 257 image=BlobToImage(read_info,ept_info.postscript,ept_info.postscript_length, 258 exception); 259 if (image == (Image *) NULL) 260 { 261 (void) CopyMagickString(read_info->magick,"TIFF",MagickPathExtent); 262 image=BlobToImage(read_info,ept_info.tiff,ept_info.tiff_length,exception); 263 } 264 read_info=DestroyImageInfo(read_info); 265 if (image != (Image *) NULL) 266 { 267 (void) CopyMagickString(image->filename,image_info->filename, 268 MagickPathExtent); 269 (void) CopyMagickString(image->magick,"EPT",MagickPathExtent); 270 } 271 ept_info.tiff=(unsigned char *) RelinquishMagickMemory(ept_info.tiff); 272 ept_info.postscript=(unsigned char *) RelinquishMagickMemory( 273 ept_info.postscript); 274 return(image); 275 } 276 277 /* 279 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 280 % % 281 % % 282 % % 283 % R e g i s t e r E P T I m a g e % 284 % % 285 % % 286 % % 287 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 288 % 289 % RegisterEPTImage() adds attributes for the EPT image format to 290 % the list of supported formats. The attributes include the image format 291 % tag, a method to read and/or write the format, whether the format 292 % supports the saving of more than one frame to the same file or blob, 293 % whether the format supports native in-memory I/O, and a brief 294 % description of the format. 295 % 296 % The format of the RegisterEPTImage method is: 297 % 298 % size_t RegisterEPTImage(void) 299 % 300 */ 301 ModuleExport size_t RegisterEPTImage(void) 302 { 303 MagickInfo 304 *entry; 305 306 entry=AcquireMagickInfo("EPT","EPT", 307 "Encapsulated PostScript with TIFF preview"); 308 entry->decoder=(DecodeImageHandler *) ReadEPTImage; 309 entry->encoder=(EncodeImageHandler *) WriteEPTImage; 310 entry->magick=(IsImageFormatHandler *) IsEPT; 311 entry->flags|=CoderDecoderSeekableStreamFlag; 312 entry->flags^=CoderAdjoinFlag; 313 entry->flags^=CoderBlobSupportFlag; 314 (void) RegisterMagickInfo(entry); 315 entry=AcquireMagickInfo("EPT","EPT2", 316 "Encapsulated PostScript Level II with TIFF preview"); 317 entry->decoder=(DecodeImageHandler *) ReadEPTImage; 318 entry->encoder=(EncodeImageHandler *) WriteEPTImage; 319 entry->magick=(IsImageFormatHandler *) IsEPT; 320 entry->flags^=CoderAdjoinFlag; 321 entry->flags|=CoderDecoderSeekableStreamFlag; 322 entry->flags^=CoderBlobSupportFlag; 323 (void) RegisterMagickInfo(entry); 324 entry=AcquireMagickInfo("EPT","EPT3", 325 "Encapsulated PostScript Level III with TIFF preview"); 326 entry->decoder=(DecodeImageHandler *) ReadEPTImage; 327 entry->encoder=(EncodeImageHandler *) WriteEPTImage; 328 entry->magick=(IsImageFormatHandler *) IsEPT; 329 entry->flags|=CoderDecoderSeekableStreamFlag; 330 entry->flags^=CoderBlobSupportFlag; 331 (void) RegisterMagickInfo(entry); 332 return(MagickImageCoderSignature); 333 } 334 335 /* 337 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 338 % % 339 % % 340 % % 341 % U n r e g i s t e r E P T I m a g e % 342 % % 343 % % 344 % % 345 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 346 % 347 % UnregisterEPTImage() removes format registrations made by the 348 % EPT module from the list of supported formats. 349 % 350 % The format of the UnregisterEPTImage method is: 351 % 352 % UnregisterEPTImage(void) 353 % 354 */ 355 ModuleExport void UnregisterEPTImage(void) 356 { 357 (void) UnregisterMagickInfo("EPT"); 358 } 359 360 /* 362 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 363 % % 364 % % 365 % % 366 % W r i t e E P T I m a g e % 367 % % 368 % % 369 % % 370 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 371 % 372 % WriteEPTImage() writes an image in the Encapsulated Postscript format 373 % with a TIFF preview. 374 % 375 % The format of the WriteEPTImage method is: 376 % 377 % MagickBooleanType WriteEPTImage(const ImageInfo *image_info, 378 % Image *image,ExceptionInfo *exception) 379 % 380 % A description of each parameter follows. 381 % 382 % o image_info: the image info. 383 % 384 % o image: The image. 385 % 386 % o exception: return any errors or warnings in this structure. 387 % 388 */ 389 static MagickBooleanType WriteEPTImage(const ImageInfo *image_info,Image *image, 390 ExceptionInfo *exception) 391 { 392 char 393 filename[MagickPathExtent]; 394 395 EPTInfo 396 ept_info; 397 398 Image 399 *write_image; 400 401 ImageInfo 402 *write_info; 403 404 MagickBooleanType 405 status; 406 407 /* 408 Write EPT image. 409 */ 410 assert(image_info != (const ImageInfo *) NULL); 411 assert(image_info->signature == MagickCoreSignature); 412 assert(image != (Image *) NULL); 413 assert(image->signature == MagickCoreSignature); 414 if (image->debug != MagickFalse) 415 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); 416 assert(exception != (ExceptionInfo *) NULL); 417 assert(exception->signature == MagickCoreSignature); 418 status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception); 419 if (status == MagickFalse) 420 return(status); 421 write_image=CloneImage(image,0,0,MagickTrue,exception); 422 if (write_image == (Image *) NULL) 423 return(MagickFalse); 424 write_info=CloneImageInfo(image_info); 425 (void) CopyMagickString(write_info->filename,"EPS:",MagickPathExtent); 426 (void) CopyMagickString(write_info->magick,"EPS",MagickPathExtent); 427 if (LocaleCompare(image_info->magick,"EPT2") == 0) 428 { 429 (void) CopyMagickString(write_info->filename,"EPS2:",MagickPathExtent); 430 (void) CopyMagickString(write_info->magick,"EPS2",MagickPathExtent); 431 } 432 if (LocaleCompare(image_info->magick,"EPT3") == 0) 433 { 434 (void) CopyMagickString(write_info->filename,"EPS3:",MagickPathExtent); 435 (void) CopyMagickString(write_info->magick,"EPS3",MagickPathExtent); 436 } 437 (void) memset(&ept_info,0,sizeof(ept_info)); 438 ept_info.magick=0xc6d3d0c5ul; 439 ept_info.postscript=(unsigned char *) ImageToBlob(write_info,write_image, 440 &ept_info.postscript_length,exception); 441 write_image=DestroyImage(write_image); 442 write_info=DestroyImageInfo(write_info); 443 if (ept_info.postscript == (void *) NULL) 444 return(MagickFalse); 445 write_image=CloneImage(image,0,0,MagickTrue,exception); 446 if (write_image == (Image *) NULL) 447 return(MagickFalse); 448 write_info=CloneImageInfo(image_info); 449 (void) CopyMagickString(write_info->magick,"TIFF",MagickPathExtent); 450 (void) FormatLocaleString(filename,MagickPathExtent,"tiff:%s", 451 write_info->filename); 452 (void) CopyMagickString(write_info->filename,filename,MagickPathExtent); 453 if ((write_image->columns > 512) || (write_image->rows > 512)) 454 { 455 Image 456 *resize_image; 457 458 resize_image=ResizeImage(write_image,512,512,write_image->filter, 459 exception); 460 if (resize_image != (Image *) NULL) 461 { 462 write_image=DestroyImage(write_image); 463 write_image=resize_image; 464 } 465 } 466 if ((write_image->storage_class == DirectClass) || 467 (write_image->colors > 256)) 468 { 469 QuantizeInfo 470 quantize_info; 471 472 /* 473 EPT preview requires that the image is colormapped. 474 */ 475 GetQuantizeInfo(&quantize_info); 476 quantize_info.dither_method=IdentifyPaletteImage(write_image, 477 exception) == MagickFalse ? RiemersmaDitherMethod : NoDitherMethod; 478 (void) QuantizeImage(&quantize_info,write_image,exception); 479 } 480 write_info->compression=NoCompression; 481 ept_info.tiff=(unsigned char *) ImageToBlob(write_info,write_image, 482 &ept_info.tiff_length,exception); 483 write_image=DestroyImage(write_image); 484 write_info=DestroyImageInfo(write_info); 485 if (ept_info.tiff == (void *) NULL) 486 { 487 ept_info.postscript=(unsigned char *) RelinquishMagickMemory( 488 ept_info.postscript); 489 return(MagickFalse); 490 } 491 /* 492 Write EPT image. 493 */ 494 (void) WriteBlobLSBLong(image,(unsigned int) ept_info.magick); 495 (void) WriteBlobLSBLong(image,30); 496 (void) WriteBlobLSBLong(image,(unsigned int) ept_info.postscript_length); 497 (void) WriteBlobLSBLong(image,0); 498 (void) WriteBlobLSBLong(image,0); 499 (void) WriteBlobLSBLong(image,(unsigned int) ept_info.postscript_length+30); 500 (void) WriteBlobLSBLong(image,(unsigned int) ept_info.tiff_length); 501 (void) WriteBlobLSBShort(image,0xffff); 502 (void) WriteBlob(image,ept_info.postscript_length,ept_info.postscript); 503 (void) WriteBlob(image,ept_info.tiff_length,ept_info.tiff); 504 /* 505 Relinquish resources. 506 */ 507 ept_info.postscript=(unsigned char *) RelinquishMagickMemory( 508 ept_info.postscript); 509 ept_info.tiff=(unsigned char *) RelinquishMagickMemory(ept_info.tiff); 510 (void) CloseBlob(image); 511 return(MagickTrue); 512 } 513
