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 1999-2014 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   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 == MagickSignature);
 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 == MagickSignature);
 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   /*
 169     Convert bi-level image to pixel packets.
 170   */
 171   for (y=0; y < (ssize_t) image->rows; y++)
 172   {
 173     q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
 174     if (q == (Quantum *) NULL)
 175       break;
 176     bit=0;
 177     byte=0;
 178     for (x=0; x < (ssize_t) image->columns; x++)
 179     {
 180       if (bit == 0)
 181         {
 182           byte=ReadBlobByte(image);
 183           if (byte == EOF)
 184             ThrowReaderException(CorruptImageError,"CorruptImage");
 185         }
 186       SetPixelIndex(image,(byte & (0x01 << (7-bit))) ? 0x00 : 0x01,q);
 187       bit++;
 188       if (bit == 8)
 189         bit=0;
 190       q+=GetPixelChannels(image);
 191     }
 192     if (SyncAuthenticPixels(image,exception) == MagickFalse)
 193       break;
 194     if (image->previous == (Image *) NULL)
 195       {
 196         status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
 197                 image->rows);
 198         if (status == MagickFalse)
 199           break;
 200       }
 201   }
 202   (void) SyncImage(image,exception);
 203   if (EOFBlob(image) != MagickFalse)
 204     ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
 205       image->filename);
 206   (void) CloseBlob(image);
 207   return(GetFirstImageInList(image));
 208 }
 209 \f
 210 /*
 211 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 212 %                                                                             %
 213 %                                                                             %
 214 %                                                                             %
 215 %   R e g i s t e r O T B I m a g e                                           %
 216 %                                                                             %
 217 %                                                                             %
 218 %                                                                             %
 219 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 220 %
 221 %  RegisterOTBImage() adds attributes for the OTB image format to
 222 %  the list of supported formats.  The attributes include the image format
 223 %  tag, a method to read and/or write the format, whether the format
 224 %  supports the saving of more than one frame to the same file or blob,
 225 %  whether the format supports native in-memory I/O, and a brief
 226 %  description of the format.
 227 %
 228 %  The format of the RegisterOTBImage method is:
 229 %
 230 %      size_t RegisterOTBImage(void)
 231 %
 232 */
 233 ModuleExport size_t RegisterOTBImage(void)
 234 {
 235   MagickInfo
 236     *entry;
 237
 238   entry=SetMagickInfo("OTB");
 239   entry->decoder=(DecodeImageHandler *) ReadOTBImage;
 240   entry->encoder=(EncodeImageHandler *) WriteOTBImage;
 241   entry->adjoin=MagickFalse;
 242   entry->description=ConstantString("On-the-air bitmap");
 243   entry->module=ConstantString("OTB");
 244   (void) RegisterMagickInfo(entry);
 245   return(MagickImageCoderSignature);
 246 }
 247 \f
 248 /*
 249 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 250 %                                                                             %
 251 %                                                                             %
 252 %                                                                             %
 253 %   U n r e g i s t e r O T B I m a g e                                       %
 254 %                                                                             %
 255 %                                                                             %
 256 %                                                                             %
 257 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 258 %
 259 %  UnregisterOTBImage() removes format registrations made by the
 260 %  OTB module from the list of supported formats.
 261 %
 262 %  The format of the UnregisterOTBImage method is:
 263 %
 264 %      UnregisterOTBImage(void)
 265 %
 266 */
 267 ModuleExport void UnregisterOTBImage(void)
 268 {
 269   (void) UnregisterMagickInfo("OTB");
 270 }
 271 \f
 272 /*
 273 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 274 %                                                                             %
 275 %                                                                             %
 276 %                                                                             %
 277 %   W r i t e O T B I m a g e                                                 %
 278 %                                                                             %
 279 %                                                                             %
 280 %                                                                             %
 281 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 282 %
 283 %  WriteOTBImage() writes an image to a file in the On-the-air Bitmap
 284 %  (level 0) image format.
 285 %
 286 %  The format of the WriteOTBImage method is:
 287 %
 288 %      MagickBooleanType WriteOTBImage(const ImageInfo *image_info,
 289 %        Image *image,ExceptionInfo *exception)
 290 %
 291 %  A description of each parameter follows.
 292 %
 293 %    o image_info: the image info.
 294 %
 295 %    o image:  The image.
 296 %
 297 %    o exception: return any errors or warnings in this structure.
 298 %
 299 */
 300 static MagickBooleanType WriteOTBImage(const ImageInfo *image_info,Image *image,
 301   ExceptionInfo *exception)
 302 {
 303 #define SetBit(a,i,set) \
 304   a=(unsigned char) ((set) ? (a) | (1L << (i)) : (a) & ~(1L << (i)))
 305
 306   MagickBooleanType
 307     status;
 308
 309   register const Quantum
 310     *p;
 311
 312   register ssize_t
 313     x;
 314
 315   ssize_t
 316     y;
 317
 318   unsigned char
 319     bit,
 320     byte,
 321     info;
 322
 323   /*
 324     Open output image file.
 325   */
 326   assert(image_info != (const ImageInfo *) NULL);
 327   assert(image_info->signature == MagickSignature);
 328   assert(image != (Image *) NULL);
 329   assert(image->signature == MagickSignature);
 330   if (image->debug != MagickFalse)
 331     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
 332   assert(exception != (ExceptionInfo *) NULL);
 333   assert(exception->signature == MagickSignature);
 334   status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception);
 335   if (status == MagickFalse)
 336     return(status);
 337   (void) TransformImageColorspace(image,sRGBColorspace,exception);
 338   /*
 339     Convert image to a bi-level image.
 340   */
 341   (void) SetImageType(image,BilevelType,exception);
 342   info=0;
 343   if ((image->columns >= 256) || (image->rows >= 256))
 344     SetBit(info,4,1);
 345   (void) WriteBlobByte(image,info);
 346   if ((image->columns >= 256) || (image->rows >= 256))
 347     {
 348       (void) WriteBlobMSBShort(image,(unsigned short) image->columns);
 349       (void) WriteBlobMSBShort(image,(unsigned short) image->rows);
 350     }
 351   else
 352     {
 353       (void) WriteBlobByte(image,(unsigned char) image->columns);
 354       (void) WriteBlobByte(image,(unsigned char) image->rows);
 355     }
 356   (void) WriteBlobByte(image,1);  /* depth */
 357   for (y=0; y < (ssize_t) image->rows; y++)
 358   {
 359     p=GetVirtualPixels(image,0,y,image->columns,1,exception);
 360     if (p == (const Quantum *) NULL)
 361       break;
 362     bit=0;
 363     byte=0;
 364     for (x=0; x < (ssize_t) image->columns; x++)
 365     {
 366       if (GetPixelLuma(image,p) < (QuantumRange/2.0))
 367         byte|=0x1 << (7-bit);
 368       bit++;
 369       if (bit == 8)
 370         {
 371           (void) WriteBlobByte(image,byte);
 372           bit=0;
 373           byte=0;
 374         }
 375       p+=GetPixelChannels(image);
 376     }
 377     if (bit != 0)
 378       (void) WriteBlobByte(image,byte);
 379     if (image->previous == (Image *) NULL)
 380       {
 381         status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
 382           image->rows);
 383         if (status == MagickFalse)
 384           break;
 385       }
 386   }
 387   (void) CloseBlob(image);
 388   return(MagickTrue);
 389 }