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 1999-2016 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 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 (void) ReadBlobLSBLong(image); 205 (void) ReadBlobLSBLong(image); 206 ept_info.tiff_offset=(MagickOffsetType) ReadBlobLSBLong(image); 207 ept_info.tiff_length=ReadBlobLSBLong(image); 208 (void) ReadBlobLSBShort(image); 209 ept_info.postscript=(unsigned char *) AcquireQuantumMemory( 210 ept_info.postscript_length+1,sizeof(*ept_info.postscript)); 211 if (ept_info.postscript == (unsigned char *) NULL) 212 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed"); 213 (void) ResetMagickMemory(ept_info.postscript,0,(ept_info.postscript_length+1)* 214 sizeof(*ept_info.postscript)); 215 ept_info.tiff=(unsigned char *) AcquireQuantumMemory(ept_info.tiff_length+1, 216 sizeof(*ept_info.tiff)); 217 if (ept_info.tiff == (unsigned char *) NULL) 218 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed"); 219 (void) ResetMagickMemory(ept_info.tiff,0,(ept_info.tiff_length+1)* 220 sizeof(*ept_info.tiff)); 221 offset=SeekBlob(image,ept_info.tiff_offset,SEEK_SET); 222 if (offset < 30) 223 ThrowReaderException(CorruptImageError,"ImproperImageHeader"); 224 count=ReadBlob(image,ept_info.tiff_length,ept_info.tiff); 225 if (count != (ssize_t) (ept_info.tiff_length)) 226 (void) ThrowMagickException(exception,GetMagickModule(),CorruptImageWarning, 227 "InsufficientImageDataInFile","`%s'",image->filename); 228 offset=SeekBlob(image,ept_info.postscript_offset,SEEK_SET); 229 if (offset < 30) 230 ThrowReaderException(CorruptImageError,"ImproperImageHeader"); 231 count=ReadBlob(image,ept_info.postscript_length,ept_info.postscript); 232 if (count != (ssize_t) (ept_info.postscript_length)) 233 (void) ThrowMagickException(exception,GetMagickModule(),CorruptImageWarning, 234 "InsufficientImageDataInFile","`%s'",image->filename); 235 (void) CloseBlob(image); 236 image=DestroyImage(image); 237 read_info=CloneImageInfo(image_info); 238 (void) CopyMagickString(read_info->magick,"EPS",MagickPathExtent); 239 image=BlobToImage(read_info,ept_info.postscript,ept_info.postscript_length, 240 exception); 241 if (image == (Image *) NULL) 242 { 243 (void) CopyMagickString(read_info->magick,"TIFF",MagickPathExtent); 244 image=BlobToImage(read_info,ept_info.tiff,ept_info.tiff_length,exception); 245 } 246 read_info=DestroyImageInfo(read_info); 247 if (image != (Image *) NULL) 248 { 249 (void) CopyMagickString(image->filename,image_info->filename, 250 MagickPathExtent); 251 (void) CopyMagickString(image->magick,"EPT",MagickPathExtent); 252 } 253 ept_info.tiff=(unsigned char *) RelinquishMagickMemory(ept_info.tiff); 254 ept_info.postscript=(unsigned char *) RelinquishMagickMemory( 255 ept_info.postscript); 256 return(image); 257 } 258 259 /* 261 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 262 % % 263 % % 264 % % 265 % R e g i s t e r E P T I m a g e % 266 % % 267 % % 268 % % 269 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 270 % 271 % RegisterEPTImage() adds attributes for the EPT image format to 272 % the list of supported formats. The attributes include the image format 273 % tag, a method to read and/or write the format, whether the format 274 % supports the saving of more than one frame to the same file or blob, 275 % whether the format supports native in-memory I/O, and a brief 276 % description of the format. 277 % 278 % The format of the RegisterEPTImage method is: 279 % 280 % size_t RegisterEPTImage(void) 281 % 282 */ 283 ModuleExport size_t RegisterEPTImage(void) 284 { 285 MagickInfo 286 *entry; 287 288 entry=AcquireMagickInfo("EPT","EPT", 289 "Encapsulated PostScript with TIFF preview"); 290 entry->decoder=(DecodeImageHandler *) ReadEPTImage; 291 entry->encoder=(EncodeImageHandler *) WriteEPTImage; 292 entry->magick=(IsImageFormatHandler *) IsEPT; 293 entry->flags|=CoderSeekableStreamFlag; 294 entry->flags^=CoderAdjoinFlag; 295 entry->flags^=CoderBlobSupportFlag; 296 (void) RegisterMagickInfo(entry); 297 entry=AcquireMagickInfo("EPT","EPT2", 298 "Encapsulated PostScript Level II with TIFF preview"); 299 entry->decoder=(DecodeImageHandler *) ReadEPTImage; 300 entry->encoder=(EncodeImageHandler *) WriteEPTImage; 301 entry->magick=(IsImageFormatHandler *) IsEPT; 302 entry->flags^=CoderAdjoinFlag; 303 entry->flags|=CoderSeekableStreamFlag; 304 entry->flags^=CoderBlobSupportFlag; 305 (void) RegisterMagickInfo(entry); 306 entry=AcquireMagickInfo("EPT","EPT3", 307 "Encapsulated PostScript Level III with TIFF preview"); 308 entry->decoder=(DecodeImageHandler *) ReadEPTImage; 309 entry->encoder=(EncodeImageHandler *) WriteEPTImage; 310 entry->magick=(IsImageFormatHandler *) IsEPT; 311 entry->flags|=CoderSeekableStreamFlag; 312 entry->flags^=CoderBlobSupportFlag; 313 (void) RegisterMagickInfo(entry); 314 return(MagickImageCoderSignature); 315 } 316 317 /* 319 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 320 % % 321 % % 322 % % 323 % U n r e g i s t e r E P T I m a g e % 324 % % 325 % % 326 % % 327 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 328 % 329 % UnregisterEPTImage() removes format registrations made by the 330 % EPT module from the list of supported formats. 331 % 332 % The format of the UnregisterEPTImage method is: 333 % 334 % UnregisterEPTImage(void) 335 % 336 */ 337 ModuleExport void UnregisterEPTImage(void) 338 { 339 (void) UnregisterMagickInfo("EPT"); 340 } 341 342 /* 344 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 345 % % 346 % % 347 % % 348 % W r i t e E P T I m a g e % 349 % % 350 % % 351 % % 352 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 353 % 354 % WriteEPTImage() writes an image in the Encapsulated Postscript format 355 % with a TIFF preview. 356 % 357 % The format of the WriteEPTImage method is: 358 % 359 % MagickBooleanType WriteEPTImage(const ImageInfo *image_info, 360 % Image *image,ExceptionInfo *exception) 361 % 362 % A description of each parameter follows. 363 % 364 % o image_info: the image info. 365 % 366 % o image: The image. 367 % 368 % o exception: return any errors or warnings in this structure. 369 % 370 */ 371 static MagickBooleanType WriteEPTImage(const ImageInfo *image_info,Image *image, 372 ExceptionInfo *exception) 373 { 374 char 375 filename[MagickPathExtent]; 376 377 EPTInfo 378 ept_info; 379 380 Image 381 *write_image; 382 383 ImageInfo 384 *write_info; 385 386 MagickBooleanType 387 status; 388 389 /* 390 Write EPT image. 391 */ 392 assert(image_info != (const ImageInfo *) NULL); 393 assert(image_info->signature == MagickCoreSignature); 394 assert(image != (Image *) NULL); 395 assert(image->signature == MagickCoreSignature); 396 if (image->debug != MagickFalse) 397 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); 398 assert(exception != (ExceptionInfo *) NULL); 399 assert(exception->signature == MagickCoreSignature); 400 status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception); 401 if (status == MagickFalse) 402 return(status); 403 write_image=CloneImage(image,0,0,MagickTrue,exception); 404 if (write_image == (Image *) NULL) 405 return(MagickFalse); 406 write_info=CloneImageInfo(image_info); 407 (void) CopyMagickString(write_info->magick,"EPS",MagickPathExtent); 408 if (LocaleCompare(image_info->magick,"EPT2") == 0) 409 (void) CopyMagickString(write_info->magick,"EPS2",MagickPathExtent); 410 if (LocaleCompare(image_info->magick,"EPT3") == 0) 411 (void) CopyMagickString(write_info->magick,"EPS3",MagickPathExtent); 412 (void) ResetMagickMemory(&ept_info,0,sizeof(ept_info)); 413 ept_info.magick=0xc6d3d0c5ul; 414 ept_info.postscript=(unsigned char *) ImageToBlob(write_info,write_image, 415 &ept_info.postscript_length,exception); 416 write_image=DestroyImage(write_image); 417 write_info=DestroyImageInfo(write_info); 418 if (ept_info.postscript == (void *) NULL) 419 return(MagickFalse); 420 write_image=CloneImage(image,0,0,MagickTrue,exception); 421 if (write_image == (Image *) NULL) 422 return(MagickFalse); 423 write_info=CloneImageInfo(image_info); 424 *write_info->magick='\0'; 425 (void) CopyMagickString(write_info->magick,"TIFF",MagickPathExtent); 426 (void) FormatLocaleString(filename,MagickPathExtent,"tiff:%s", 427 write_info->filename); 428 (void) CopyMagickString(write_info->filename,filename,MagickPathExtent); 429 if ((write_image->columns > 512) || (write_image->rows > 512)) 430 { 431 Image 432 *resize_image; 433 434 resize_image=ResizeImage(write_image,512,512,write_image->filter, 435 exception); 436 if (resize_image != (Image *) NULL) 437 { 438 write_image=DestroyImage(write_image); 439 write_image=resize_image; 440 } 441 } 442 if ((write_image->storage_class == DirectClass) || 443 (write_image->colors > 256)) 444 { 445 QuantizeInfo 446 quantize_info; 447 448 /* 449 EPT preview requires that the image is colormapped. 450 */ 451 GetQuantizeInfo(&quantize_info); 452 quantize_info.dither_method=IdentifyPaletteImage(write_image, 453 exception) == MagickFalse ? RiemersmaDitherMethod : NoDitherMethod; 454 (void) QuantizeImage(&quantize_info,write_image,exception); 455 } 456 write_info->compression=NoCompression; 457 ept_info.tiff=(unsigned char *) ImageToBlob(write_info,write_image, 458 &ept_info.tiff_length,exception); 459 write_image=DestroyImage(write_image); 460 write_info=DestroyImageInfo(write_info); 461 if (ept_info.tiff == (void *) NULL) 462 { 463 ept_info.postscript=(unsigned char *) RelinquishMagickMemory( 464 ept_info.postscript); 465 return(MagickFalse); 466 } 467 /* 468 Write EPT image. 469 */ 470 (void) WriteBlobLSBLong(image,(unsigned int) ept_info.magick); 471 (void) WriteBlobLSBLong(image,30); 472 (void) WriteBlobLSBLong(image,(unsigned int) ept_info.postscript_length); 473 (void) WriteBlobLSBLong(image,0); 474 (void) WriteBlobLSBLong(image,0); 475 (void) WriteBlobLSBLong(image,(unsigned int) ept_info.postscript_length+30); 476 (void) WriteBlobLSBLong(image,(unsigned int) ept_info.tiff_length); 477 (void) WriteBlobLSBShort(image,0xffff); 478 (void) WriteBlob(image,ept_info.postscript_length,ept_info.postscript); 479 (void) WriteBlob(image,ept_info.tiff_length,ept_info.tiff); 480 /* 481 Relinquish resources. 482 */ 483 ept_info.postscript=(unsigned char *) RelinquishMagickMemory( 484 ept_info.postscript); 485 ept_info.tiff=(unsigned char *) RelinquishMagickMemory(ept_info.tiff); 486 (void) CloseBlob(image); 487 return(MagickTrue); 488 } 489
