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 1999-2018 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   if (count != 8)
 186     ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 187   image->depth=(size_t) precision;
 188   if (LocaleCompare(endian,"ML") == 0)
 189     image->endian=MSBEndian;
 190   image->columns=(size_t) width;
 191   image->rows=(size_t) height;
 192   if ((image->columns == 0) || (image->rows == 0))
 193     ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 194   if (image_info->ping != MagickFalse)
 195     {
 196       (void) CloseBlob(image);
 197       return(GetFirstImageInList(image));
 198     }
 199   status=SetImageExtent(image,image->columns,image->rows,exception);
 200   if (status == MagickFalse)
 201     return(DestroyImageList(image));
 202   /*
 203     Convert PGX image.
 204   */
 205   (void) SetImageColorspace(image,GRAYColorspace,exception);
 206   quantum_info=AcquireQuantumInfo(image_info,image);
 207   if (quantum_info == (QuantumInfo *) NULL)
 208     ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 209   length=GetQuantumExtent(image,quantum_info,GrayQuantum);
 210   for (y=0; y < (ssize_t) image->rows; y++)
 211   {
 212     register Quantum
 213       *magick_restrict q;
 214
 215     q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
 216     if (q == (Quantum *) NULL)
 217       break;
 218     pixels=(const unsigned char *) ReadBlobStream(image,length,
 219       GetQuantumPixels(quantum_info),&count);
 220     if (count != (ssize_t) length)
 221       break;
 222     (void) ImportQuantumPixels(image,(CacheView *) NULL,quantum_info,
 223       GrayQuantum,pixels,exception);
 224     if (status == MagickFalse)
 225       break;
 226     if (SyncAuthenticPixels(image,exception) == MagickFalse)
 227       break;
 228     if (SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,image->rows) == MagickFalse)
 229       break;
 230   }
 231   SetQuantumImageType(image,GrayQuantum);
 232   quantum_info=DestroyQuantumInfo(quantum_info);
 233   if (EOFBlob(image) != MagickFalse)
 234     ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
 235       image->filename);
 236   (void) CloseBlob(image);
 237   return(GetFirstImageInList(image));
 238 }
 239 \f
 240 /*
 241 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 242 %                                                                             %
 243 %                                                                             %
 244 %                                                                             %
 245 %   R e g i s t e r P G X I m a g e                                           %
 246 %                                                                             %
 247 %                                                                             %
 248 %                                                                             %
 249 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 250 %
 251 %  RegisterPGXImage() adds attributes for the PGX image format to
 252 %  the list of supported formats.  The attributes include the image format
 253 %  tag, a method to read and/or write the format, whether the format
 254 %  supports the saving of more than one frame to the same file or blob,
 255 %  whether the format supports native in-memory I/O, and a brief
 256 %  description of the format.
 257 %
 258 %  The format of the RegisterPGXImage method is:
 259 %
 260 %      size_t RegisterPGXImage(void)
 261 %
 262 */
 263 ModuleExport size_t RegisterPGXImage(void)
 264 {
 265   MagickInfo
 266     *entry;
 267
 268   entry=AcquireMagickInfo("PGX","PGX","JPEG 2000 uncompressed format");
 269   entry->decoder=(DecodeImageHandler *) ReadPGXImage;
 270   entry->encoder=(EncodeImageHandler *) WritePGXImage;
 271   entry->magick=(IsImageFormatHandler *) IsPGX;
 272   entry->flags^=CoderAdjoinFlag;
 273   entry->flags^=CoderUseExtensionFlag;
 274   (void) RegisterMagickInfo(entry);
 275   return(MagickImageCoderSignature);
 276 }
 277 \f
 278 /*
 279 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 280 %                                                                             %
 281 %                                                                             %
 282 %                                                                             %
 283 %   U n r e g i s t e r P G X I m a g e                                       %
 284 %                                                                             %
 285 %                                                                             %
 286 %                                                                             %
 287 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 288 %
 289 %  UnregisterPGXImage() removes format registrations made by the
 290 %  PGX module from the list of supported formats.
 291 %
 292 %  The format of the UnregisterPGXImage method is:
 293 %
 294 %      UnregisterPGXImage(void)
 295 %
 296 */
 297 ModuleExport void UnregisterPGXImage(void)
 298 {
 299   (void) UnregisterMagickInfo("PGX");
 300 }
 301 \f
 302 /*
 303 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 304 %                                                                             %
 305 %                                                                             %
 306 %                                                                             %
 307 %   W r i t e P G X I m a g e                                                 %
 308 %                                                                             %
 309 %                                                                             %
 310 %                                                                             %
 311 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 312 %
 313 %  WritePGXImage() writes an image of raw bits in LSB order to a file.
 314 %
 315 %  The format of the WritePGXImage method is:
 316 %
 317 %      MagickBooleanType WritePGXImage(const ImageInfo *image_info,
 318 %        Image *image,ExceptionInfo *exception)
 319 %
 320 %  A description of each parameter follows.
 321 %
 322 %    o image_info: the image info.
 323 %
 324 %    o image:  The image.
 325 %
 326 %    o exception: return any errors or warnings in this structure.
 327 %
 328 */
 329 static MagickBooleanType WritePGXImage(const ImageInfo *image_info,Image *image,
 330   ExceptionInfo *exception)
 331 {
 332   char
 333     buffer[MagickPathExtent];
 334
 335   MagickBooleanType
 336     status;
 337
 338   QuantumInfo
 339     *quantum_info;
 340
 341   register const Quantum
 342     *p;
 343
 344   size_t
 345     length;
 346
 347   ssize_t
 348     count,
 349     y;
 350
 351   unsigned char
 352     *pixels;
 353
 354   /*
 355     Open output image file.
 356   */
 357   assert(image_info != (const ImageInfo *) NULL);
 358   assert(image_info->signature == MagickCoreSignature);
 359   assert(image != (Image *) NULL);
 360   assert(image->signature == MagickCoreSignature);
 361   if (image->debug != MagickFalse)
 362     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
 363   assert(exception != (ExceptionInfo *) NULL);
 364   assert(exception->signature == MagickCoreSignature);
 365   status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception);
 366   if (status == MagickFalse)
 367     return(status);
 368   (void) FormatLocaleString(buffer,MagickPathExtent,"PG ML + %ld %lu %lu\n",
 369     image->depth,image->columns,image->rows);
 370   (void) WriteBlob(image,strlen(buffer),(unsigned char *) buffer);
 371   (void) TransformImageColorspace(image,sRGBColorspace,exception);
 372   quantum_info=AcquireQuantumInfo(image_info,image);
 373   if (quantum_info == (QuantumInfo *) NULL)
 374     ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
 375   pixels=(unsigned char *) GetQuantumPixels(quantum_info);
 376   for (y=0; y < (ssize_t) image->rows; y++)
 377   {
 378     p=GetVirtualPixels(image,0,y,image->columns,1,exception);
 379     if (p == (const Quantum *) NULL)
 380       break;
 381     length=ExportQuantumPixels(image,(CacheView *) NULL,quantum_info,
 382       GrayQuantum,pixels,exception);
 383     count=WriteBlob(image,length,pixels);
 384     if (count != (ssize_t) length)
 385       break;
 386     count=WriteBlob(image,(size_t) (-(ssize_t) length) & 0x01,pixels);
 387     status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
 388       image->rows);
 389     if (status == MagickFalse)
 390       break;
 391   }
 392   quantum_info=DestroyQuantumInfo(quantum_info);
 393   if (y < (ssize_t) image->rows)
 394     ThrowWriterException(CorruptImageError,"UnableToWriteImageData");
 395   (void) CloseBlob(image);
 396   return(status);
 397 }