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

   1 /*
   2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
   3 %                                                                             %
   4 %                                                                             %
   5 %                                                                             %
   6 %                            PPPP   W   W  PPPP                               %
   7 %                            P   P  W   W  P   P                              %
   8 %                            PPPP   W   W  PPPP                               %
   9 %                            P      W W W  P                                  %
  10 %                            P       W W   P                                  %
  11 %                                                                             %
  12 %                                                                             %
  13 %                    Read Seattle Film Works Image Format                     %
  14 %                                                                             %
  15 %                              Software Design                                %
  16 %                                John Cristy                                  %
  17 %                                 July 1992                                   %
  18 %                                                                             %
  19 %                                                                             %
  20 %  Copyright 1999-2011 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 \f
  39 /*
  40   Include declarations.
  41 */
  42 #include "magick/studio.h"
  43 #include "magick/blob.h"
  44 #include "magick/blob-private.h"
  45 #include "magick/constitute.h"
  46 #include "magick/exception.h"
  47 #include "magick/exception-private.h"
  48 #include "magick/image.h"
  49 #include "magick/image-private.h"
  50 #include "magick/list.h"
  51 #include "magick/magick.h"
  52 #include "magick/memory_.h"
  53 #include "magick/monitor.h"
  54 #include "magick/monitor-private.h"
  55 #include "magick/resource_.h"
  56 #include "magick/quantum-private.h"
  57 #include "magick/static.h"
  58 #include "magick/string_.h"
  59 #include "magick/module.h"
  60 \f
  61 /*
  62 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  63 %                                                                             %
  64 %                                                                             %
  65 %                                                                             %
  66 %   I s P W P                                                                 %
  67 %                                                                             %
  68 %                                                                             %
  69 %                                                                             %
  70 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  71 %
  72 %  IsPWP() returns MagickTrue if the image format type, identified by the
  73 %  magick string, is PWP.
  74 %
  75 %  The format of the IsPWP method is:
  76 %
  77 %      MagickBooleanType IsPWP(const unsigned char *magick,const size_t length)
  78 %
  79 %  A description of each parameter follows:
  80 %
  81 %    o magick: compare image format pattern against these bytes.
  82 %
  83 %    o length: Specifies the length of the magick string.
  84 %
  85 %
  86 */
  87 static MagickBooleanType IsPWP(const unsigned char *magick,const size_t length)
  88 {
  89   if (length < 5)
  90     return(MagickFalse);
  91   if (LocaleNCompare((char *) magick,"SFW95",5) == 0)
  92     return(MagickTrue);
  93   return(MagickFalse);
  94 }
  95 \f
  96 /*
  97 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  98 %                                                                             %
  99 %                                                                             %
 100 %                                                                             %
 101 %   R e a d P W P I m a g e                                                   %
 102 %                                                                             %
 103 %                                                                             %
 104 %                                                                             %
 105 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 106 %
 107 %  ReadPWPImage() reads a Seattle Film Works multi-image file and returns
 108 %  it.  It allocates the memory necessary for the new Image structure and
 109 %  returns a pointer to the new image.
 110 %
 111 %  The format of the ReadPWPImage method is:
 112 %
 113 %      Image *ReadPWPImage(const ImageInfo *image_info,ExceptionInfo *exception)
 114 %
 115 %  A description of each parameter follows:
 116 %
 117 %    o image_info: the image info.
 118 %
 119 %    o exception: return any errors or warnings in this structure.
 120 %
 121 */
 122 static Image *ReadPWPImage(const ImageInfo *image_info,ExceptionInfo *exception)
 123 {
 124   FILE
 125     *file;
 126
 127   Image
 128     *image,
 129     *next_image,
 130     *pwp_image;
 131
 132   ImageInfo
 133     *read_info;
 134
 135   int
 136     c,
 137     unique_file;
 138
 139   MagickBooleanType
 140     status;
 141
 142   register Image
 143     *p;
 144
 145   register ssize_t
 146     i;
 147
 148   size_t
 149     length;
 150
 151   ssize_t
 152     count;
 153
 154   unsigned char
 155     magick[MaxTextExtent];
 156
 157   size_t
 158     filesize;
 159
 160   /*
 161     Open image file.
 162   */
 163   assert(image_info != (const ImageInfo *) NULL);
 164   assert(image_info->signature == MagickSignature);
 165   if (image_info->debug != MagickFalse)
 166     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
 167       image_info->filename);
 168   assert(exception != (ExceptionInfo *) NULL);
 169   assert(exception->signature == MagickSignature);
 170   pwp_image=AcquireImage(image_info);
 171   image=pwp_image;
 172   status=OpenBlob(image_info,pwp_image,ReadBinaryBlobMode,exception);
 173   if (status == MagickFalse)
 174     return((Image *) NULL);
 175   count=ReadBlob(pwp_image,5,magick);
 176   if ((count == 0) || (LocaleNCompare((char *) magick,"SFW95",5) != 0))
 177     ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 178   read_info=CloneImageInfo(image_info);
 179   (void) SetImageInfoProgressMonitor(read_info,(MagickProgressMonitor) NULL,
 180     (void *) NULL);
 181   SetImageInfoBlob(read_info,(void *) NULL,0);
 182   unique_file=AcquireUniqueFileResource(read_info->filename);
 183   for ( ; ; )
 184   {
 185     for (c=ReadBlobByte(pwp_image); c != EOF; c=ReadBlobByte(pwp_image))
 186     {
 187       for (i=0; i < 17; i++)
 188         magick[i]=magick[i+1];
 189       magick[17]=(unsigned char) c;
 190       if (LocaleNCompare((char *) (magick+12),"SFW94A",6) == 0)
 191         break;
 192     }
 193     if (c == EOF)
 194       break;
 195     if (LocaleNCompare((char *) (magick+12),"SFW94A",6) != 0)
 196       ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 197     /*
 198       Dump SFW image to a temporary file.
 199     */
 200     file=(FILE *) NULL;
 201     if (unique_file != -1)
 202       file=fdopen(unique_file,"wb");
 203     if ((unique_file == -1) || (file == (FILE *) NULL))
 204       {
 205         ThrowFileException(exception,FileOpenError,"UnableToWriteFile",
 206           image->filename);
 207         image=DestroyImageList(image);
 208         return((Image *) NULL);
 209       }
 210     length=fwrite("SFW94A",1,6,file);
 211     (void) length;
 212     filesize=65535UL*magick[2]+256L*magick[1]+magick[0];
 213     for (i=0; i < (ssize_t) filesize; i++)
 214     {
 215       c=ReadBlobByte(pwp_image);
 216       (void) fputc(c,file);
 217     }
 218     (void) fclose(file);
 219     next_image=ReadImage(read_info,exception);
 220     if (next_image == (Image *) NULL)
 221       break;
 222     (void) FormatMagickString(next_image->filename,MaxTextExtent,
 223       "slide_%02ld.sfw",(long) next_image->scene);
 224     if (image == (Image *) NULL)
 225       image=next_image;
 226     else
 227       {
 228         /*
 229           Link image into image list.
 230         */
 231         for (p=image; p->next != (Image *) NULL; p=GetNextImageInList(p)) ;
 232         next_image->previous=p;
 233         next_image->scene=p->scene+1;
 234         p->next=next_image;
 235       }
 236     if (image_info->number_scenes != 0)
 237       if (next_image->scene >= (image_info->scene+image_info->number_scenes-1))
 238         break;
 239     status=SetImageProgress(image,LoadImagesTag,TellBlob(pwp_image),
 240       GetBlobSize(pwp_image));
 241     if (status == MagickFalse)
 242       break;
 243   }
 244   (void) RelinquishUniqueFileResource(read_info->filename);
 245   read_info=DestroyImageInfo(read_info);
 246   (void) CloseBlob(pwp_image);
 247   pwp_image=DestroyImage(pwp_image);
 248   if (EOFBlob(image) != MagickFalse)
 249     {
 250       char
 251         *message;
 252
 253       message=GetExceptionMessage(errno);
 254       (void) ThrowMagickException(exception,GetMagickModule(),CorruptImageError,
 255         "UnexpectedEndOfFile","`%s': %s",image->filename,message);
 256       message=DestroyString(message);
 257     }
 258   (void) CloseBlob(image);
 259   return(GetFirstImageInList(image));
 260 }
 261 \f
 262 /*
 263 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 264 %                                                                             %
 265 %                                                                             %
 266 %                                                                             %
 267 %   R e g i s t e r P W P I m a g e                                           %
 268 %                                                                             %
 269 %                                                                             %
 270 %                                                                             %
 271 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 272 %
 273 %  RegisterPWPImage() adds attributes for the PWP image format to
 274 %  the list of supported formats.  The attributes include the image format
 275 %  tag, a method to read and/or write the format, whether the format
 276 %  supports the saving of more than one frame to the same file or blob,
 277 %  whether the format supports native in-memory I/O, and a brief
 278 %  description of the format.
 279 %
 280 %  The format of the RegisterPWPImage method is:
 281 %
 282 %      size_t RegisterPWPImage(void)
 283 %
 284 */
 285 ModuleExport size_t RegisterPWPImage(void)
 286 {
 287   MagickInfo
 288     *entry;
 289
 290   entry=SetMagickInfo("PWP");
 291   entry->decoder=(DecodeImageHandler *) ReadPWPImage;
 292   entry->magick=(IsImageFormatHandler *) IsPWP;
 293   entry->description=ConstantString("Seattle Film Works");
 294   entry->module=ConstantString("PWP");
 295   (void) RegisterMagickInfo(entry);
 296   return(MagickImageCoderSignature);
 297 }
 298 \f
 299 /*
 300 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 301 %                                                                             %
 302 %                                                                             %
 303 %                                                                             %
 304 %   U n r e g i s t e r P W P I m a g e                                       %
 305 %                                                                             %
 306 %                                                                             %
 307 %                                                                             %
 308 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 309 %
 310 %  UnregisterPWPImage() removes format registrations made by the
 311 %  PWP module from the list of supported formats.
 312 %
 313 %  The format of the UnregisterPWPImage method is:
 314 %
 315 %      UnregisterPWPImage(void)
 316 %
 317 */
 318 ModuleExport void UnregisterPWPImage(void)
 319 {
 320   (void) UnregisterMagickInfo("PWP");
 321 }