granicus.if.org Git - imagemagick/blob - coders/pgx.c

   1 /*
   2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
   3 %                                                                             %
   4 %                                                                             %
   5 %                                                                             %
   6 %                            PPPP    GGGG  X   X                              %
   7 %                            P   P  G       X X                               %
   8 %                            PPPP   G  GG    X                                %
   9 %                            P      G   G   X X                               %
  10 %                            P       GGG   X   X                              %
  11 %                                                                             %
  12 %                                                                             %
  13 %                           PGX JPEG 2000 Format                              %
  14 %                                                                             %
  15 %                              Software Design                                %
  16 %                                   Cristy                                    %
  17 %                                 July 2016                                   %
  18 %                                                                             %
  19 %                                                                             %
  20 %  Copyright 1999-2017 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://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/attribute.h"
  44 #include "MagickCore/blob.h"
  45 #include "MagickCore/blob-private.h"
  46 #include "MagickCore/cache.h"
  47 #include "MagickCore/color-private.h"
  48 #include "MagickCore/colormap.h"
  49 #include "MagickCore/colorspace.h"
  50 #include "MagickCore/colorspace-private.h"
  51 #include "MagickCore/exception.h"
  52 #include "MagickCore/exception-private.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/quantum-private.h"
  61 #include "MagickCore/static.h"
  62 #include "MagickCore/string_.h"
  63 #include "MagickCore/module.h"
  64 \f
  65 /*
  66   Forward declarations.
  67 */
  68 static MagickBooleanType
  69   WritePGXImage(const ImageInfo *,Image *,ExceptionInfo *);
  70 \f
  71 /*
  72 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  73 %                                                                             %
  74 %                                                                             %
  75 %                                                                             %
  76 %   I s P G X                                                                 %
  77 %                                                                             %
  78 %                                                                             %
  79 %                                                                             %
  80 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  81 %
  82 %  IsPGXreturns True if the image format type, identified by the magick
  83 %  string, is PGX.
  84 %
  85 %  The format of the IsPGX method is:
  86 %
  87 %      unsigned int IsPGX(const unsigned char *magick,const size_t length)
  88 %
  89 %  A description of each parameter follows:
  90 %
  91 %    o magick: compare image format pattern against these bytes.
  92 %
  93 %    o length: Specifies the length of the magick string.
  94 %
  95 */
  96 static unsigned int IsPGX(const unsigned char *magick,const size_t length)
  97 {
  98   if (length < 5)
  99     return(MagickFalse);
 100   if ((memcmp(magick,"PG ML",5) == 0) || (memcmp(magick,"PG LM",5) == 0))
 101     return(MagickTrue);
 102   return(MagickFalse);
 103 }
 104 \f
 105 /*
 106 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 107 %                                                                             %
 108 %                                                                             %
 109 %                                                                             %
 110 %   R e a d P G X I m a g e                                                   %
 111 %                                                                             %
 112 %                                                                             %
 113 %                                                                             %
 114 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 115 %
 116 %  ReadPGXImage() reads an image of raw bits in LSB order and returns it.
 117 %  It allocates the memory necessary for the new Image structure and returns
 118 %  a pointer to the new image.
 119 %
 120 %  The format of the ReadPGXImage method is:
 121 %
 122 %      Image *ReadPGXImage(const ImageInfo *image_info,
 123 %        ExceptionInfo *exception)
 124 %
 125 %  A description of each parameter follows:
 126 %
 127 %    o image_info: the image info.
 128 %
 129 %    o exception: return any errors or warnings in this structure.
 130 %
 131 */
 132 static Image *ReadPGXImage(const ImageInfo *image_info,ExceptionInfo *exception)
 133 {
 134   char
 135     buffer[MagickPathExtent],
 136     endian[MagickPathExtent],
 137     sans[MagickPathExtent],
 138     sign[MagickPathExtent];
 139
 140   const unsigned char
 141     *pixels;
 142
 143   Image
 144     *image;
 145
 146   int
 147     height,
 148     precision,
 149     width;
 150
 151   QuantumInfo
 152     *quantum_info;
 153
 154   MagickBooleanType
 155     status;
 156
 157   size_t
 158     length;
 159
 160   ssize_t
 161     count,
 162     y;
 163
 164   /*
 165     Open image file.
 166   */
 167   assert(image_info != (const ImageInfo *) NULL);
 168   assert(image_info->signature == MagickCoreSignature);
 169   if (image_info->debug != MagickFalse)
 170     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
 171       image_info->filename);
 172   assert(exception != (ExceptionInfo *) NULL);
 173   assert(exception->signature == MagickCoreSignature);
 174   image=AcquireImage(image_info,exception);
 175   status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
 176   if (status == MagickFalse)
 177     {
 178       image=DestroyImageList(image);
 179       return((Image *) NULL);
 180     }
 181   if (ReadBlobString(image,buffer) == (char *) NULL)
 182     ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 183   count=(ssize_t) sscanf(buffer,"PG%[ \t]%2s%[ \t+-]%d%[ \t]%d%[ \t]%d",sans,
 184     endian,sign,&precision,sans,&width,sans,&height);
 185   image->depth=(size_t) precision;
 186   if (LocaleCompare(endian,"ML") == 0)
 187     image->endian=MSBEndian;
 188   image->columns=(size_t) width;
 189   image->rows=(size_t) height;
 190   if ((image->columns == 0) || (image->rows == 0))
 191     ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 192   if (image_info->ping != MagickFalse)
 193     {
 194       (void) CloseBlob(image);
 195       return(GetFirstImageInList(image));
 196     }
 197   status=SetImageExtent(image,image->columns,image->rows,exception);
 198   if (status == MagickFalse)
 199     return(DestroyImageList(image));
 200   /*
 201     Convert PGX image.
 202   */
 203   (void) SetImageColorspace(image,GRAYColorspace,exception);
 204   quantum_info=AcquireQuantumInfo(image_info,image);
 205   if (quantum_info == (QuantumInfo *) NULL)
 206     ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 207   length=GetQuantumExtent(image,quantum_info,GrayQuantum);
 208   for (y=0; y < (ssize_t) image->rows; y++)
 209   {
 210     register Quantum
 211       *magick_restrict q;
 212
 213     q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
 214     if (q == (Quantum *) NULL)
 215       break;
 216     pixels=(const unsigned char *) ReadBlobStream(image,length,
 217       GetQuantumPixels(quantum_info),&count);
 218     if (count != (ssize_t) length)
 219       break;
 220     status=ImportQuantumPixels(image,(CacheView *) NULL,quantum_info,
 221       GrayQuantum,pixels,exception);
 222     if (status == MagickFalse)
 223       break;
 224     if (SyncAuthenticPixels(image,exception) == MagickFalse)
 225       break;
 226     if (SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,image->rows) == MagickFalse)
 227       break;
 228   }
 229   SetQuantumImageType(image,GrayQuantum);
 230   quantum_info=DestroyQuantumInfo(quantum_info);
 231   if (EOFBlob(image) != MagickFalse)
 232     ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
 233       image->filename);
 234   (void) CloseBlob(image);
 235   return(GetFirstImageInList(image));
 236 }
 237 \f
 238 /*
 239 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 240 %                                                                             %
 241 %                                                                             %
 242 %                                                                             %
 243 %   R e g i s t e r P G X I m a g e                                           %
 244 %                                                                             %
 245 %                                                                             %
 246 %                                                                             %
 247 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 248 %
 249 %  RegisterPGXImage() adds attributes for the PGX image format to
 250 %  the list of supported formats.  The attributes include the image format
 251 %  tag, a method to read and/or write the format, whether the format
 252 %  supports the saving of more than one frame to the same file or blob,
 253 %  whether the format supports native in-memory I/O, and a brief
 254 %  description of the format.
 255 %
 256 %  The format of the RegisterPGXImage method is:
 257 %
 258 %      size_t RegisterPGXImage(void)
 259 %
 260 */
 261 ModuleExport size_t RegisterPGXImage(void)
 262 {
 263   MagickInfo
 264     *entry;
 265
 266   entry=AcquireMagickInfo("PGX","PGX","JPEG 2000 uncompressed format");
 267   entry->decoder=(DecodeImageHandler *) ReadPGXImage;
 268   entry->encoder=(EncodeImageHandler *) WritePGXImage;
 269   entry->magick=(IsImageFormatHandler *) IsPGX;
 270   entry->flags^=CoderAdjoinFlag;
 271   entry->flags^=CoderUseExtensionFlag;
 272   (void) RegisterMagickInfo(entry);
 273   return(MagickImageCoderSignature);
 274 }
 275 \f
 276 /*
 277 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 278 %                                                                             %
 279 %                                                                             %
 280 %                                                                             %
 281 %   U n r e g i s t e r P G X I m a g e                                       %
 282 %                                                                             %
 283 %                                                                             %
 284 %                                                                             %
 285 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 286 %
 287 %  UnregisterPGXImage() removes format registrations made by the
 288 %  PGX module from the list of supported formats.
 289 %
 290 %  The format of the UnregisterPGXImage method is:
 291 %
 292 %      UnregisterPGXImage(void)
 293 %
 294 */
 295 ModuleExport void UnregisterPGXImage(void)
 296 {
 297   (void) UnregisterMagickInfo("PGX");
 298 }
 299 \f
 300 /*
 301 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 302 %                                                                             %
 303 %                                                                             %
 304 %                                                                             %
 305 %   W r i t e P G X I m a g e                                                 %
 306 %                                                                             %
 307 %                                                                             %
 308 %                                                                             %
 309 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 310 %
 311 %  WritePGXImage() writes an image of raw bits in LSB order to a file.
 312 %
 313 %  The format of the WritePGXImage method is:
 314 %
 315 %      MagickBooleanType WritePGXImage(const ImageInfo *image_info,
 316 %        Image *image,ExceptionInfo *exception)
 317 %
 318 %  A description of each parameter follows.
 319 %
 320 %    o image_info: the image info.
 321 %
 322 %    o image:  The image.
 323 %
 324 %    o exception: return any errors or warnings in this structure.
 325 %
 326 */
 327 static MagickBooleanType WritePGXImage(const ImageInfo *image_info,Image *image,
 328   ExceptionInfo *exception)
 329 {
 330   char
 331     buffer[MagickPathExtent];
 332
 333   MagickBooleanType
 334     status;
 335
 336   QuantumInfo
 337     *quantum_info;
 338
 339   register const Quantum
 340     *p;
 341
 342   size_t
 343     length;
 344
 345   ssize_t
 346     count,
 347     y;
 348
 349   unsigned char
 350     *pixels;
 351
 352   /*
 353     Open output image file.
 354   */
 355   assert(image_info != (const ImageInfo *) NULL);
 356   assert(image_info->signature == MagickCoreSignature);
 357   assert(image != (Image *) NULL);
 358   assert(image->signature == MagickCoreSignature);
 359   if (image->debug != MagickFalse)
 360     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
 361   assert(exception != (ExceptionInfo *) NULL);
 362   assert(exception->signature == MagickCoreSignature);
 363   status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception);
 364   if (status == MagickFalse)
 365     return(status);
 366   (void) FormatLocaleString(buffer,MagickPathExtent,"PG ML + %ld %lu %lu\n",
 367     image->depth,image->columns,image->rows);
 368   (void) WriteBlob(image,strlen(buffer),(unsigned char *) buffer);
 369   (void) TransformImageColorspace(image,sRGBColorspace,exception);
 370   quantum_info=AcquireQuantumInfo(image_info,image);
 371   if (quantum_info == (QuantumInfo *) NULL)
 372     ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
 373   pixels=(unsigned char *) GetQuantumPixels(quantum_info);
 374   for (y=0; y < (ssize_t) image->rows; y++)
 375   {
 376     p=GetVirtualPixels(image,0,y,image->columns,1,exception);
 377     if (p == (const Quantum *) NULL)
 378       break;
 379     length=ExportQuantumPixels(image,(CacheView *) NULL,quantum_info,
 380       GrayQuantum,pixels,exception);
 381     count=WriteBlob(image,length,pixels);
 382     if (count != (ssize_t) length)
 383       break;
 384     count=WriteBlob(image,(size_t) (-(ssize_t) length) & 0x01,pixels);
 385     status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
 386       image->rows);
 387     if (status == MagickFalse)
 388       break;
 389   }
 390   quantum_info=DestroyQuantumInfo(quantum_info);
 391   if (y < (ssize_t) image->rows)
 392     ThrowWriterException(CorruptImageError,"UnableToWriteImageData");
 393   (void) CloseBlob(image);
 394   return(status);
 395 }