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

   1 /*
   2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
   3 %                                                                             %
   4 %                                                                             %
   5 %                                                                             %
   6 %                              OOO   TTTTT  BBBB                              %
   7 %                             O   O    T    B   B                             %
   8 %                             O   O    T    BBBB                              %
   9 %                             O   O    T    B   B                             %
  10 %                              OOO     T    BBBB                              %
  11 %                                                                             %
  12 %                                                                             %
  13 %                      Read/Write On-The-Air Image Format                     %
  14 %                                                                             %
  15 %                              Software Design                                %
  16 %                                   Cristy                                    %
  17 %                               January 2000                                  %
  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 /*
  39   Include declarations.
  40 */
  41 #include "MagickCore/studio.h"
  42 #include "MagickCore/attribute.h"
  43 #include "MagickCore/blob.h"
  44 #include "MagickCore/blob-private.h"
  45 #include "MagickCore/cache.h"
  46 #include "MagickCore/color-private.h"
  47 #include "MagickCore/colormap.h"
  48 #include "MagickCore/colorspace.h"
  49 #include "MagickCore/colorspace-private.h"
  50 #include "MagickCore/exception.h"
  51 #include "MagickCore/exception-private.h"
  52 #include "MagickCore/image.h"
  53 #include "MagickCore/image-private.h"
  54 #include "MagickCore/list.h"
  55 #include "MagickCore/magick.h"
  56 #include "MagickCore/memory_.h"
  57 #include "MagickCore/monitor.h"
  58 #include "MagickCore/monitor-private.h"
  59 #include "MagickCore/pixel-accessor.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   WriteOTBImage(const ImageInfo *,Image *,ExceptionInfo *);
  70 \f
  71 /*
  72 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  73 %                                                                             %
  74 %                                                                             %
  75 %                                                                             %
  76 %   R e a d O T B I m a g e                                                   %
  77 %                                                                             %
  78 %                                                                             %
  79 %                                                                             %
  80 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  81 %
  82 %  ReadOTBImage() reads a on-the-air (level 0) bitmap and returns it.  It
  83 %  allocates the memory necessary for the new Image structure and returns a
  84 %  pointer to the new image.
  85 %
  86 %  The format of the ReadOTBImage method is:
  87 %
  88 %      Image *ReadOTBImage(const ImageInfo *image_info,ExceptionInfo *exception)
  89 %
  90 %  A description of each parameter follows:
  91 %
  92 %    o image_info: the image info.
  93 %
  94 %    o exception: return any errors or warnings in this structure.
  95 %
  96 %
  97 */
  98 static Image *ReadOTBImage(const ImageInfo *image_info,ExceptionInfo *exception)
  99 {
 100 #define GetBit(a,i) (((a) >> (i)) & 1L)
 101
 102   Image
 103     *image;
 104
 105   int
 106     byte;
 107
 108   MagickBooleanType
 109     status;
 110
 111   register ssize_t
 112     x;
 113
 114   register Quantum
 115     *q;
 116
 117   ssize_t
 118     y;
 119
 120   unsigned char
 121     bit,
 122     info,
 123     depth;
 124
 125   /*
 126     Open image file.
 127   */
 128   assert(image_info != (const ImageInfo *) NULL);
 129   assert(image_info->signature == MagickCoreSignature);
 130   if (image_info->debug != MagickFalse)
 131     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
 132       image_info->filename);
 133   assert(exception != (ExceptionInfo *) NULL);
 134   assert(exception->signature == MagickCoreSignature);
 135   image=AcquireImage(image_info,exception);
 136   status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
 137   if (status == MagickFalse)
 138     {
 139       image=DestroyImageList(image);
 140       return((Image *) NULL);
 141     }
 142   /*
 143     Initialize image structure.
 144   */
 145   info=(unsigned char) ReadBlobByte(image);
 146   if (GetBit(info,4) == 0)
 147     {
 148       image->columns=(size_t) ReadBlobByte(image);
 149       image->rows=(size_t) ReadBlobByte(image);
 150     }
 151   else
 152     {
 153       image->columns=(size_t) ReadBlobMSBShort(image);
 154       image->rows=(size_t) ReadBlobMSBShort(image);
 155     }
 156   if ((image->columns == 0) || (image->rows == 0))
 157     ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 158   depth=(unsigned char) ReadBlobByte(image);
 159   if (depth != 1)
 160     ThrowReaderException(CoderError,"OnlyLevelZerofilesSupported");
 161   if (AcquireImageColormap(image,2,exception) == MagickFalse)
 162     ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 163   if (image_info->ping != MagickFalse)
 164     {
 165       (void) CloseBlob(image);
 166       return(GetFirstImageInList(image));
 167     }
 168   status=SetImageExtent(image,image->columns,image->rows,exception);
 169   if (status == MagickFalse)
 170     return(DestroyImageList(image));
 171   /*
 172     Convert bi-level image to pixel packets.
 173   */
 174   for (y=0; y < (ssize_t) image->rows; y++)
 175   {
 176     q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
 177     if (q == (Quantum *) NULL)
 178       break;
 179     bit=0;
 180     byte=0;
 181     for (x=0; x < (ssize_t) image->columns; x++)
 182     {
 183       if (bit == 0)
 184         {
 185           byte=ReadBlobByte(image);
 186           if (byte == EOF)
 187             ThrowReaderException(CorruptImageError,"CorruptImage");
 188         }
 189       SetPixelIndex(image,(byte & (0x01 << (7-bit))) ? 0x00 : 0x01,q);
 190       bit++;
 191       if (bit == 8)
 192         bit=0;
 193       q+=GetPixelChannels(image);
 194     }
 195     if (SyncAuthenticPixels(image,exception) == MagickFalse)
 196       break;
 197     if (image->previous == (Image *) NULL)
 198       {
 199         status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
 200                 image->rows);
 201         if (status == MagickFalse)
 202           break;
 203       }
 204   }
 205   (void) SyncImage(image,exception);
 206   if (EOFBlob(image) != MagickFalse)
 207     ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
 208       image->filename);
 209   (void) CloseBlob(image);
 210   return(GetFirstImageInList(image));
 211 }
 212 \f
 213 /*
 214 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 215 %                                                                             %
 216 %                                                                             %
 217 %                                                                             %
 218 %   R e g i s t e r O T B I m a g e                                           %
 219 %                                                                             %
 220 %                                                                             %
 221 %                                                                             %
 222 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 223 %
 224 %  RegisterOTBImage() adds attributes for the OTB image format to
 225 %  the list of supported formats.  The attributes include the image format
 226 %  tag, a method to read and/or write the format, whether the format
 227 %  supports the saving of more than one frame to the same file or blob,
 228 %  whether the format supports native in-memory I/O, and a brief
 229 %  description of the format.
 230 %
 231 %  The format of the RegisterOTBImage method is:
 232 %
 233 %      size_t RegisterOTBImage(void)
 234 %
 235 */
 236 ModuleExport size_t RegisterOTBImage(void)
 237 {
 238   MagickInfo
 239     *entry;
 240
 241   entry=AcquireMagickInfo("OTB","OTB","On-the-air bitmap");
 242   entry->decoder=(DecodeImageHandler *) ReadOTBImage;
 243   entry->encoder=(EncodeImageHandler *) WriteOTBImage;
 244   entry->flags^=CoderAdjoinFlag;
 245   (void) RegisterMagickInfo(entry);
 246   return(MagickImageCoderSignature);
 247 }
 248 \f
 249 /*
 250 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 251 %                                                                             %
 252 %                                                                             %
 253 %                                                                             %
 254 %   U n r e g i s t e r O T B I m a g e                                       %
 255 %                                                                             %
 256 %                                                                             %
 257 %                                                                             %
 258 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 259 %
 260 %  UnregisterOTBImage() removes format registrations made by the
 261 %  OTB module from the list of supported formats.
 262 %
 263 %  The format of the UnregisterOTBImage method is:
 264 %
 265 %      UnregisterOTBImage(void)
 266 %
 267 */
 268 ModuleExport void UnregisterOTBImage(void)
 269 {
 270   (void) UnregisterMagickInfo("OTB");
 271 }
 272 \f
 273 /*
 274 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 275 %                                                                             %
 276 %                                                                             %
 277 %                                                                             %
 278 %   W r i t e O T B I m a g e                                                 %
 279 %                                                                             %
 280 %                                                                             %
 281 %                                                                             %
 282 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 283 %
 284 %  WriteOTBImage() writes an image to a file in the On-the-air Bitmap
 285 %  (level 0) image format.
 286 %
 287 %  The format of the WriteOTBImage method is:
 288 %
 289 %      MagickBooleanType WriteOTBImage(const ImageInfo *image_info,
 290 %        Image *image,ExceptionInfo *exception)
 291 %
 292 %  A description of each parameter follows.
 293 %
 294 %    o image_info: the image info.
 295 %
 296 %    o image:  The image.
 297 %
 298 %    o exception: return any errors or warnings in this structure.
 299 %
 300 */
 301 static MagickBooleanType WriteOTBImage(const ImageInfo *image_info,Image *image,
 302   ExceptionInfo *exception)
 303 {
 304 #define SetBit(a,i,set) \
 305   a=(unsigned char) ((set) ? (a) | (1L << (i)) : (a) & ~(1L << (i)))
 306
 307   MagickBooleanType
 308     status;
 309
 310   register const Quantum
 311     *p;
 312
 313   register ssize_t
 314     x;
 315
 316   ssize_t
 317     y;
 318
 319   unsigned char
 320     bit,
 321     byte,
 322     info;
 323
 324   /*
 325     Open output image file.
 326   */
 327   assert(image_info != (const ImageInfo *) NULL);
 328   assert(image_info->signature == MagickCoreSignature);
 329   assert(image != (Image *) NULL);
 330   assert(image->signature == MagickCoreSignature);
 331   if (image->debug != MagickFalse)
 332     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
 333   assert(exception != (ExceptionInfo *) NULL);
 334   assert(exception->signature == MagickCoreSignature);
 335   status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception);
 336   if (status == MagickFalse)
 337     return(status);
 338   (void) TransformImageColorspace(image,sRGBColorspace,exception);
 339   /*
 340     Convert image to a bi-level image.
 341   */
 342   (void) SetImageType(image,BilevelType,exception);
 343   info=0;
 344   if ((image->columns >= 256) || (image->rows >= 256))
 345     SetBit(info,4,1);
 346   (void) WriteBlobByte(image,info);
 347   if ((image->columns >= 256) || (image->rows >= 256))
 348     {
 349       (void) WriteBlobMSBShort(image,(unsigned short) image->columns);
 350       (void) WriteBlobMSBShort(image,(unsigned short) image->rows);
 351     }
 352   else
 353     {
 354       (void) WriteBlobByte(image,(unsigned char) image->columns);
 355       (void) WriteBlobByte(image,(unsigned char) image->rows);
 356     }
 357   (void) WriteBlobByte(image,1);  /* depth */
 358   for (y=0; y < (ssize_t) image->rows; y++)
 359   {
 360     p=GetVirtualPixels(image,0,y,image->columns,1,exception);
 361     if (p == (const Quantum *) NULL)
 362       break;
 363     bit=0;
 364     byte=0;
 365     for (x=0; x < (ssize_t) image->columns; x++)
 366     {
 367       if (GetPixelLuma(image,p) < (QuantumRange/2.0))
 368         byte|=0x1 << (7-bit);
 369       bit++;
 370       if (bit == 8)
 371         {
 372           (void) WriteBlobByte(image,byte);
 373           bit=0;
 374           byte=0;
 375         }
 376       p+=GetPixelChannels(image);
 377     }
 378     if (bit != 0)
 379       (void) WriteBlobByte(image,byte);
 380     if (image->previous == (Image *) NULL)
 381       {
 382         status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
 383           image->rows);
 384         if (status == MagickFalse)
 385           break;
 386       }
 387   }
 388   (void) CloseBlob(image);
 389   return(MagickTrue);
 390 }