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

   1 /*
   2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
   3 %                                                                             %
   4 %                                                                             %
   5 %                                                                             %
   6 %                             AAA   V   V  SSSSS                              %
   7 %                            A   A  V   V  SS                                 %
   8 %                            AAAAA  V   V   SSS                               %
   9 %                            A   A   V V      SS                              %
  10 %                            A   A    V    SSSSS                              %
  11 %                                                                             %
  12 %                                                                             %
  13 %                        Read/Write AVS X 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 "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   WriteAVSImage(const ImageInfo *,Image *,ExceptionInfo *);
  68 \f
  69 /*
  70 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  71 %                                                                             %
  72 %                                                                             %
  73 %                                                                             %
  74 %   R e a d A V S I m a g e                                                   %
  75 %                                                                             %
  76 %                                                                             %
  77 %                                                                             %
  78 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  79 %
  80 %  ReadAVSImage() reads an AVS X 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 ReadAVSImage method is:
  85 %
  86 %      Image *ReadAVSImage(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 *ReadAVSImage(const ImageInfo *image_info,ExceptionInfo *exception)
  96 {
  97   Image
  98     *image;
  99
 100   MagickBooleanType
 101     status;
 102
 103   register Quantum
 104     *q;
 105
 106   register ssize_t
 107     x;
 108
 109   register unsigned char
 110     *p;
 111
 112   size_t
 113     height,
 114     length,
 115     width;
 116
 117   ssize_t
 118     count,
 119     y;
 120
 121   unsigned char
 122     *pixels;
 123
 124   /*
 125     Open image file.
 126   */
 127   assert(image_info != (const ImageInfo *) NULL);
 128   assert(image_info->signature == MagickSignature);
 129   if (image_info->debug != MagickFalse)
 130     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
 131       image_info->filename);
 132   assert(exception != (ExceptionInfo *) NULL);
 133   assert(exception->signature == MagickSignature);
 134   image=AcquireImage(image_info,exception);
 135   status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
 136   if (status == MagickFalse)
 137     {
 138       image=DestroyImageList(image);
 139       return((Image *) NULL);
 140     }
 141   /*
 142     Read AVS X image.
 143   */
 144   width=ReadBlobMSBLong(image);
 145   height=ReadBlobMSBLong(image);
 146   if (EOFBlob(image) != MagickFalse)
 147     ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 148   if ((width == 0UL) || (height == 0UL))
 149     ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 150   do
 151   {
 152     /*
 153       Convert AVS raster image to pixel packets.
 154     */
 155     image->columns=width;
 156     image->rows=height;
 157     image->depth=8;
 158     if ((image_info->ping != MagickFalse) && (image_info->number_scenes != 0))
 159       if (image->scene >= (image_info->scene+image_info->number_scenes-1))
 160         break;
 161     pixels=(unsigned char *) AcquireQuantumMemory(image->columns,
 162       4*sizeof(*pixels));
 163     if (pixels == (unsigned char *) NULL)
 164       ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 165     length=(size_t) 4*image->columns;
 166     for (y=0; y < (ssize_t) image->rows; y++)
 167     {
 168       count=ReadBlob(image,length,pixels);
 169       if ((size_t) count != length)
 170         ThrowReaderException(CorruptImageError,"UnableToReadImageData");
 171       p=pixels;
 172       q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
 173       if (q == (Quantum *) NULL)
 174         break;
 175       for (x=0; x < (ssize_t) image->columns; x++)
 176       {
 177         SetPixelAlpha(image,ScaleCharToQuantum(*p++),q);
 178         SetPixelRed(image,ScaleCharToQuantum(*p++),q);
 179         SetPixelGreen(image,ScaleCharToQuantum(*p++),q);
 180         SetPixelBlue(image,ScaleCharToQuantum(*p++),q);
 181         if (GetPixelAlpha(image,q) != OpaqueAlpha)
 182           image->matte=MagickTrue;
 183         q+=GetPixelChannels(image);
 184       }
 185       if (SyncAuthenticPixels(image,exception) == MagickFalse)
 186         break;
 187       if (image->previous == (Image *) NULL)
 188         {
 189           status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
 190             image->rows);
 191           if (status == MagickFalse)
 192             break;
 193         }
 194     }
 195     pixels=(unsigned char *) RelinquishMagickMemory(pixels);
 196     if (EOFBlob(image) != MagickFalse)
 197       {
 198         ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
 199           image->filename);
 200         break;
 201       }
 202     /*
 203       Proceed to next image.
 204     */
 205     if (image_info->number_scenes != 0)
 206       if (image->scene >= (image_info->scene+image_info->number_scenes-1))
 207         break;
 208     width=ReadBlobMSBLong(image);
 209     height=ReadBlobMSBLong(image);
 210     if ((width != 0UL) && (height != 0UL))
 211       {
 212         /*
 213           Allocate next image structure.
 214         */
 215         AcquireNextImage(image_info,image,exception);
 216         if (GetNextImageInList(image) == (Image *) NULL)
 217           {
 218             image=DestroyImageList(image);
 219             return((Image *) NULL);
 220           }
 221         image=SyncNextImageInList(image);
 222         status=SetImageProgress(image,LoadImagesTag,TellBlob(image),
 223           GetBlobSize(image));
 224         if (status == MagickFalse)
 225           break;
 226       }
 227   } while ((width != 0UL) && (height != 0UL));
 228   (void) CloseBlob(image);
 229   return(GetFirstImageInList(image));
 230 }
 231 \f
 232 /*
 233 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 234 %                                                                             %
 235 %                                                                             %
 236 %                                                                             %
 237 %   R e g i s t e r A V S I m a g e                                           %
 238 %                                                                             %
 239 %                                                                             %
 240 %                                                                             %
 241 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 242 %
 243 %  RegisterAVSImage() adds attributes for the AVS X image format to the list
 244 %  of supported formats.  The attributes include the image format tag, a
 245 %  method to read and/or write the format, whether the format supports the
 246 %  saving of more than one frame to the same file or blob, whether the format
 247 %  supports native in-memory I/O, and a brief description of the format.
 248 %
 249 %  The format of the RegisterAVSImage method is:
 250 %
 251 %      size_t RegisterAVSImage(void)
 252 %
 253 */
 254 ModuleExport size_t RegisterAVSImage(void)
 255 {
 256   MagickInfo
 257     *entry;
 258
 259   entry=SetMagickInfo("AVS");
 260   entry->decoder=(DecodeImageHandler *) ReadAVSImage;
 261   entry->encoder=(EncodeImageHandler *) WriteAVSImage;
 262   entry->description=ConstantString("AVS X image");
 263   entry->module=ConstantString("AVS");
 264   (void) RegisterMagickInfo(entry);
 265   return(MagickImageCoderSignature);
 266 }
 267 \f
 268 /*
 269 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 270 %                                                                             %
 271 %                                                                             %
 272 %                                                                             %
 273 %   U n r e g i s t e r A V S I m a g e                                       %
 274 %                                                                             %
 275 %                                                                             %
 276 %                                                                             %
 277 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 278 %
 279 %  UnregisterAVSImage() removes format registrations made by the
 280 %  AVS module from the list of supported formats.
 281 %
 282 %  The format of the UnregisterAVSImage method is:
 283 %
 284 %      UnregisterAVSImage(void)
 285 %
 286 */
 287 ModuleExport void UnregisterAVSImage(void)
 288 {
 289   (void) UnregisterMagickInfo("AVS");
 290 }
 291 \f
 292 /*
 293 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 294 %                                                                             %
 295 %                                                                             %
 296 %                                                                             %
 297 %   W r i t e A V S I m a g e                                                 %
 298 %                                                                             %
 299 %                                                                             %
 300 %                                                                             %
 301 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 302 %
 303 %  WriteAVSImage() writes an image to a file in AVS X image format.
 304 %
 305 %  The format of the WriteAVSImage method is:
 306 %
 307 %      MagickBooleanType WriteAVSImage(const ImageInfo *image_info,
 308 %        Image *image,ExceptionInfo *exception)
 309 %
 310 %  A description of each parameter follows.
 311 %
 312 %    o image_info: the image info.
 313 %
 314 %    o image:  The image.
 315 %
 316 %    o exception: return any errors or warnings in this structure.
 317 %
 318 */
 319 static MagickBooleanType WriteAVSImage(const ImageInfo *image_info,Image *image,
 320   ExceptionInfo *exception)
 321 {
 322   MagickBooleanType
 323     status;
 324
 325   MagickOffsetType
 326     scene;
 327
 328   register const Quantum
 329     *restrict p;
 330
 331   register ssize_t
 332     x;
 333
 334   register unsigned char
 335     *restrict q;
 336
 337   ssize_t
 338     count,
 339     y;
 340
 341   unsigned char
 342     *pixels;
 343
 344   /*
 345     Open output image file.
 346   */
 347   assert(image_info != (const ImageInfo *) NULL);
 348   assert(image_info->signature == MagickSignature);
 349   assert(image != (Image *) NULL);
 350   assert(image->signature == MagickSignature);
 351   if (image->debug != MagickFalse)
 352     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
 353   assert(exception != (ExceptionInfo *) NULL);
 354   assert(exception->signature == MagickSignature);
 355   status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception);
 356   if (status == MagickFalse)
 357     return(status);
 358   scene=0;
 359   do
 360   {
 361     /*
 362       Write AVS header.
 363     */
 364     if (IsRGBColorspace(image->colorspace) == MagickFalse)
 365       (void) TransformImageColorspace(image,RGBColorspace);
 366     (void) WriteBlobMSBLong(image,(unsigned int) image->columns);
 367     (void) WriteBlobMSBLong(image,(unsigned int) image->rows);
 368     /*
 369       Allocate memory for pixels.
 370     */
 371     pixels=(unsigned char *) AcquireQuantumMemory((size_t) image->columns,
 372       4*sizeof(*pixels));
 373     if (pixels == (unsigned char *) NULL)
 374       ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
 375     /*
 376       Convert MIFF to AVS raster pixels.
 377     */
 378     for (y=0; y < (ssize_t) image->rows; y++)
 379     {
 380       p=GetVirtualPixels(image,0,y,image->columns,1,exception);
 381       if (p == (const Quantum *) NULL)
 382         break;
 383       q=pixels;
 384       for (x=0; x < (ssize_t) image->columns; x++)
 385       {
 386         *q++=ScaleQuantumToChar((Quantum) (image->matte != MagickFalse ?
 387           GetPixelAlpha(image,p) : OpaqueAlpha));
 388         *q++=ScaleQuantumToChar(GetPixelRed(image,p));
 389         *q++=ScaleQuantumToChar(GetPixelGreen(image,p));
 390         *q++=ScaleQuantumToChar(GetPixelBlue(image,p));
 391         p+=GetPixelChannels(image);
 392       }
 393       count=WriteBlob(image,(size_t) (q-pixels),pixels);
 394       if (count != (ssize_t) (q-pixels))
 395         break;
 396       if (image->previous == (Image *) NULL)
 397         {
 398           status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
 399             image->rows);
 400           if (status == MagickFalse)
 401             break;
 402         }
 403     }
 404     pixels=(unsigned char *) RelinquishMagickMemory(pixels);
 405     if (GetNextImageInList(image) == (Image *) NULL)
 406       break;
 407     image=SyncNextImageInList(image);
 408     status=SetImageProgress(image,SaveImagesTag,scene++,
 409       GetImageListLength(image));
 410     if (status == MagickFalse)
 411       break;
 412   } while (image_info->adjoin != MagickFalse);
 413   (void) CloseBlob(image);
 414   return(MagickTrue);
 415 }