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

   1 /*
   2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
   3 %                                                                             %
   4 %                                                                             %
   5 %                                                                             %
   6 %                            H   H  RRRR   ZZZZZ                              %
   7 %                            H   H  R   R     ZZ                              %
   8 %                            HHHHH  RRRR     Z                                %
   9 %                            H   H  R R    ZZ                                 %
  10 %                            H   H  R  R   ZZZZZ                              %
  11 %                                                                             %
  12 %                                                                             %
  13 %                Read/Write Slow Scan TeleVision Image Format                 %
  14 %                                                                             %
  15 %                              Software Design                                %
  16 %                                   Cristy                                    %
  17 %                                 July 1992                                   %
  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/blob.h"
  44 #include "MagickCore/blob-private.h"
  45 #include "MagickCore/cache.h"
  46 #include "MagickCore/colorspace.h"
  47 #include "MagickCore/colorspace-private.h"
  48 #include "MagickCore/exception.h"
  49 #include "MagickCore/exception-private.h"
  50 #include "MagickCore/image.h"
  51 #include "MagickCore/image-private.h"
  52 #include "MagickCore/list.h"
  53 #include "MagickCore/magick.h"
  54 #include "MagickCore/memory_.h"
  55 #include "MagickCore/monitor.h"
  56 #include "MagickCore/monitor-private.h"
  57 #include "MagickCore/pixel-accessor.h"
  58 #include "MagickCore/quantum-private.h"
  59 #include "MagickCore/static.h"
  60 #include "MagickCore/string_.h"
  61 #include "MagickCore/module.h"
  62 \f
  63 /*
  64   Forward declarations.
  65 */
  66 static MagickBooleanType
  67   WriteHRZImage(const ImageInfo *,Image *,ExceptionInfo *);
  68 \f
  69 /*
  70 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  71 %                                                                             %
  72 %                                                                             %
  73 %                                                                             %
  74 %   R e a d H R Z I m a g e                                                   %
  75 %                                                                             %
  76 %                                                                             %
  77 %                                                                             %
  78 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  79 %
  80 %  ReadHRZImage() reads a Slow Scan TeleVision image file and returns it.  It
  81 %  allocates the memory necessary for the new Image structure and returns a
  82 %  pointer to the new image.
  83 %
  84 %  The format of the ReadHRZImage method is:
  85 %
  86 %      Image *ReadHRZImage(const ImageInfo *image_info,ExceptionInfo *exception)
  87 %
  88 %  A description of each parameter follows:
  89 %
  90 %    o image_info: the image info.
  91 %
  92 %    o exception: return any errors or warnings in this structure.
  93 %
  94 */
  95 static Image *ReadHRZImage(const ImageInfo *image_info,ExceptionInfo *exception)
  96 {
  97   Image
  98     *image;
  99
 100   MagickBooleanType
 101     status;
 102
 103   register ssize_t
 104     x;
 105
 106   register Quantum
 107     *q;
 108
 109   register unsigned char
 110     *p;
 111
 112   ssize_t
 113     count,
 114     y;
 115
 116   size_t
 117     length;
 118
 119   unsigned char
 120     *pixels;
 121
 122   /*
 123     Open image file.
 124   */
 125   assert(image_info != (const ImageInfo *) NULL);
 126   assert(image_info->signature == MagickCoreSignature);
 127   if (image_info->debug != MagickFalse)
 128     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
 129       image_info->filename);
 130   assert(exception != (ExceptionInfo *) NULL);
 131   assert(exception->signature == MagickCoreSignature);
 132   image=AcquireImage(image_info,exception);
 133   status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
 134   if (status == MagickFalse)
 135     {
 136       image=DestroyImageList(image);
 137       return((Image *) NULL);
 138     }
 139   /*
 140     Convert HRZ raster image to pixel packets.
 141   */
 142   image->columns=256;
 143   image->rows=240;
 144   image->depth=8;
 145   status=SetImageExtent(image,image->columns,image->rows,exception);
 146   if (status == MagickFalse)
 147     return(DestroyImageList(image));
 148   pixels=(unsigned char *) AcquireQuantumMemory(image->columns,3*
 149     sizeof(*pixels));
 150   if (pixels == (unsigned char *) NULL)
 151     ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 152   length=(size_t) (3*image->columns);
 153   for (y=0; y < (ssize_t) image->rows; y++)
 154   {
 155     count=ReadBlob(image,length,pixels);
 156     if ((size_t) count != length)
 157       {
 158         pixels=(unsigned char *) RelinquishMagickMemory(pixels);
 159         ThrowReaderException(CorruptImageError,"UnableToReadImageData");
 160       }
 161     p=pixels;
 162     q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
 163     if (q == (Quantum *) NULL)
 164       break;
 165     for (x=0; x < (ssize_t) image->columns; x++)
 166     {
 167       SetPixelRed(image,ScaleCharToQuantum(4**p++),q);
 168       SetPixelGreen(image,ScaleCharToQuantum(4**p++),q);
 169       SetPixelBlue(image,ScaleCharToQuantum(4**p++),q);
 170       SetPixelAlpha(image,OpaqueAlpha,q);
 171       q+=GetPixelChannels(image);
 172     }
 173     if (SyncAuthenticPixels(image,exception) == MagickFalse)
 174       break;
 175     if (SetImageProgress(image,LoadImageTag,y,image->rows) == MagickFalse)
 176       break;
 177   }
 178   pixels=(unsigned char *) RelinquishMagickMemory(pixels);
 179   if (EOFBlob(image) != MagickFalse)
 180     ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
 181       image->filename);
 182   (void) CloseBlob(image);
 183   return(GetFirstImageInList(image));
 184 }
 185 \f
 186 /*
 187 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 188 %                                                                             %
 189 %                                                                             %
 190 %                                                                             %
 191 %   R e g i s t e r H R Z I m a g e                                           %
 192 %                                                                             %
 193 %                                                                             %
 194 %                                                                             %
 195 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 196 %
 197 %  RegisterHRZImage() adds attributes for the HRZ X image format to the list
 198 %  of supported formats.  The attributes include the image format tag, a
 199 %  method to read and/or write the format, whether the format supports the
 200 %  saving of more than one frame to the same file or blob, whether the format
 201 %  supports native in-memory I/O, and a brief description of the format.
 202 %
 203 %  The format of the RegisterHRZImage method is:
 204 %
 205 %      size_t RegisterHRZImage(void)
 206 %
 207 */
 208 ModuleExport size_t RegisterHRZImage(void)
 209 {
 210   MagickInfo
 211     *entry;
 212
 213   entry=AcquireMagickInfo("HRZ","HRZ","Slow Scan TeleVision");
 214   entry->decoder=(DecodeImageHandler *) ReadHRZImage;
 215   entry->encoder=(EncodeImageHandler *) WriteHRZImage;
 216   entry->flags^=CoderAdjoinFlag;
 217   (void) RegisterMagickInfo(entry);
 218   return(MagickImageCoderSignature);
 219 }
 220 \f
 221 /*
 222 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 223 %                                                                             %
 224 %                                                                             %
 225 %                                                                             %
 226 %   U n r e g i s t e r H R Z I m a g e                                       %
 227 %                                                                             %
 228 %                                                                             %
 229 %                                                                             %
 230 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 231 %
 232 %  UnregisterHRZImage() removes format registrations made by the
 233 %  HRZ module from the list of supported formats.
 234 %
 235 %  The format of the UnregisterHRZImage method is:
 236 %
 237 %      UnregisterHRZImage(void)
 238 %
 239 */
 240 ModuleExport void UnregisterHRZImage(void)
 241 {
 242   (void) UnregisterMagickInfo("HRZ");
 243 }
 244 \f
 245 /*
 246 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 247 %                                                                             %
 248 %                                                                             %
 249 %                                                                             %
 250 %   W r i t e H R Z I m a g e                                                 %
 251 %                                                                             %
 252 %                                                                             %
 253 %                                                                             %
 254 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 255 %
 256 %  WriteHRZImage() writes an image to a file in HRZ X image format.
 257 %
 258 %  The format of the WriteHRZImage method is:
 259 %
 260 %      MagickBooleanType WriteHRZImage(const ImageInfo *image_info,
 261 %        Image *image,ExceptionInfo *exception)
 262 %
 263 %  A description of each parameter follows.
 264 %
 265 %    o image_info: the image info.
 266 %
 267 %    o image:  The image.
 268 %
 269 %    o exception: return any errors or warnings in this structure.
 270 %
 271 */
 272 static MagickBooleanType WriteHRZImage(const ImageInfo *image_info,Image *image,
 273   ExceptionInfo *exception)
 274 {
 275   Image
 276     *hrz_image;
 277
 278   MagickBooleanType
 279     status;
 280
 281   register const Quantum
 282     *p;
 283
 284   register ssize_t
 285     x,
 286     y;
 287
 288   register unsigned char
 289     *q;
 290
 291   ssize_t
 292     count;
 293
 294   unsigned char
 295     *pixels;
 296
 297   /*
 298     Open output image file.
 299   */
 300   assert(image_info != (const ImageInfo *) NULL);
 301   assert(image_info->signature == MagickCoreSignature);
 302   assert(image != (Image *) NULL);
 303   assert(image->signature == MagickCoreSignature);
 304   if (image->debug != MagickFalse)
 305     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
 306   assert(exception != (ExceptionInfo *) NULL);
 307   assert(exception->signature == MagickCoreSignature);
 308   status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception);
 309   if (status == MagickFalse)
 310     return(status);
 311   hrz_image=ResizeImage(image,256,240,image->filter,exception);
 312   if (hrz_image == (Image *) NULL)
 313     return(MagickFalse);
 314   (void) TransformImageColorspace(hrz_image,sRGBColorspace,exception);
 315   /*
 316     Allocate memory for pixels.
 317   */
 318   pixels=(unsigned char *) AcquireQuantumMemory((size_t) hrz_image->columns,
 319     3*sizeof(*pixels));
 320   if (pixels == (unsigned char *) NULL)
 321     {
 322       hrz_image=DestroyImage(hrz_image);
 323       ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
 324     }
 325   /*
 326     Convert MIFF to HRZ raster pixels.
 327   */
 328   for (y=0; y < (ssize_t) hrz_image->rows; y++)
 329   {
 330     p=GetVirtualPixels(hrz_image,0,y,hrz_image->columns,1,exception);
 331     if (p == (const Quantum *) NULL)
 332       break;
 333     q=pixels;
 334     for (x=0; x < (ssize_t) hrz_image->columns; x++)
 335     {
 336       *q++=ScaleQuantumToChar(GetPixelRed(hrz_image,p)/4);
 337       *q++=ScaleQuantumToChar(GetPixelGreen(hrz_image,p)/4);
 338       *q++=ScaleQuantumToChar(GetPixelBlue(hrz_image,p)/4);
 339       p+=GetPixelChannels(hrz_image);
 340     }
 341     count=WriteBlob(image,(size_t) (q-pixels),pixels);
 342     if (count != (ssize_t) (q-pixels))
 343       break;
 344     status=SetImageProgress(image,SaveImageTag,y,hrz_image->rows);
 345     if (status == MagickFalse)
 346       break;
 347   }
 348   pixels=(unsigned char *) RelinquishMagickMemory(pixels);
 349   hrz_image=DestroyImage(hrz_image);
 350   (void) CloseBlob(image);
 351   return(MagickTrue);
 352 }