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/exception.h"
  48 #include "MagickCore/exception-private.h"
  49 #include "MagickCore/image.h"
  50 #include "MagickCore/image-private.h"
  51 #include "MagickCore/list.h"
  52 #include "MagickCore/magick.h"
  53 #include "MagickCore/memory_.h"
  54 #include "MagickCore/monitor.h"
  55 #include "MagickCore/monitor-private.h"
  56 #include "MagickCore/pixel-accessor.h"
  57 #include "MagickCore/quantum-private.h"
  58 #include "MagickCore/static.h"
  59 #include "MagickCore/string_.h"
  60 #include "MagickCore/module.h"
  61 \f
  62 /*
  63   Forward declarations.
  64 */
  65 static MagickBooleanType
  66   WriteAVSImage(const ImageInfo *,Image *);
  67 \f
  68 /*
  69 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  70 %                                                                             %
  71 %                                                                             %
  72 %                                                                             %
  73 %   R e a d A V S I m a g e                                                   %
  74 %                                                                             %
  75 %                                                                             %
  76 %                                                                             %
  77 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  78 %
  79 %  ReadAVSImage() reads an AVS X image file and returns it.  It
  80 %  allocates the memory necessary for the new Image structure and returns a
  81 %  pointer to the new image.
  82 %
  83 %  The format of the ReadAVSImage method is:
  84 %
  85 %      Image *ReadAVSImage(const ImageInfo *image_info,ExceptionInfo *exception)
  86 %
  87 %  A description of each parameter follows:
  88 %
  89 %    o image_info: the image info.
  90 %
  91 %    o exception: return any errors or warnings in this structure.
  92 %
  93 */
  94 static Image *ReadAVSImage(const ImageInfo *image_info,ExceptionInfo *exception)
  95 {
  96   Image
  97     *image;
  98
  99   MagickBooleanType
 100     status;
 101
 102   register Quantum
 103     *q;
 104
 105   register ssize_t
 106     x;
 107
 108   register unsigned char
 109     *p;
 110
 111   size_t
 112     height,
 113     length,
 114     width;
 115
 116   ssize_t
 117     count,
 118     y;
 119
 120   unsigned char
 121     *pixels;
 122
 123   /*
 124     Open image file.
 125   */
 126   assert(image_info != (const ImageInfo *) NULL);
 127   assert(image_info->signature == MagickSignature);
 128   if (image_info->debug != MagickFalse)
 129     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
 130       image_info->filename);
 131   assert(exception != (ExceptionInfo *) NULL);
 132   assert(exception->signature == MagickSignature);
 133   image=AcquireImage(image_info);
 134   status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
 135   if (status == MagickFalse)
 136     {
 137       image=DestroyImageList(image);
 138       return((Image *) NULL);
 139     }
 140   /*
 141     Read AVS X image.
 142   */
 143   width=ReadBlobMSBLong(image);
 144   height=ReadBlobMSBLong(image);
 145   if (EOFBlob(image) != MagickFalse)
 146     ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 147   if ((width == 0UL) || (height == 0UL))
 148     ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 149   do
 150   {
 151     /*
 152       Convert AVS raster image to pixel packets.
 153     */
 154     image->columns=width;
 155     image->rows=height;
 156     image->depth=8;
 157     if ((image_info->ping != MagickFalse) && (image_info->number_scenes != 0))
 158       if (image->scene >= (image_info->scene+image_info->number_scenes-1))
 159         break;
 160     pixels=(unsigned char *) AcquireQuantumMemory(image->columns,
 161       4*sizeof(*pixels));
 162     if (pixels == (unsigned char *) NULL)
 163       ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 164     length=(size_t) 4*image->columns;
 165     for (y=0; y < (ssize_t) image->rows; y++)
 166     {
 167       count=ReadBlob(image,length,pixels);
 168       if ((size_t) count != length)
 169         ThrowReaderException(CorruptImageError,"UnableToReadImageData");
 170       p=pixels;
 171       q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
 172       if (q == (const Quantum *) NULL)
 173         break;
 174       for (x=0; x < (ssize_t) image->columns; x++)
 175       {
 176         SetPixelAlpha(image,ScaleCharToQuantum(*p++),q);
 177         SetPixelRed(image,ScaleCharToQuantum(*p++),q);
 178         SetPixelGreen(image,ScaleCharToQuantum(*p++),q);
 179         SetPixelBlue(image,ScaleCharToQuantum(*p++),q);
 180         if (GetPixelAlpha(image,q) != OpaqueAlpha)
 181           image->matte=MagickTrue;
 182         q+=GetPixelChannels(image);
 183       }
 184       if (SyncAuthenticPixels(image,exception) == MagickFalse)
 185         break;
 186       if (image->previous == (Image *) NULL)
 187         {
 188           status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
 189             image->rows);
 190           if (status == MagickFalse)
 191             break;
 192         }
 193     }
 194     pixels=(unsigned char *) RelinquishMagickMemory(pixels);
 195     if (EOFBlob(image) != MagickFalse)
 196       {
 197         ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
 198           image->filename);
 199         break;
 200       }
 201     /*
 202       Proceed to next image.
 203     */
 204     if (image_info->number_scenes != 0)
 205       if (image->scene >= (image_info->scene+image_info->number_scenes-1))
 206         break;
 207     width=ReadBlobMSBLong(image);
 208     height=ReadBlobMSBLong(image);
 209     if ((width != 0UL) && (height != 0UL))
 210       {
 211         /*
 212           Allocate next image structure.
 213         */
 214         AcquireNextImage(image_info,image);
 215         if (GetNextImageInList(image) == (Image *) NULL)
 216           {
 217             image=DestroyImageList(image);
 218             return((Image *) NULL);
 219           }
 220         image=SyncNextImageInList(image);
 221         status=SetImageProgress(image,LoadImagesTag,TellBlob(image),
 222           GetBlobSize(image));
 223         if (status == MagickFalse)
 224           break;
 225       }
 226   } while ((width != 0UL) && (height != 0UL));
 227   (void) CloseBlob(image);
 228   return(GetFirstImageInList(image));
 229 }
 230 \f
 231 /*
 232 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 233 %                                                                             %
 234 %                                                                             %
 235 %                                                                             %
 236 %   R e g i s t e r A V S I m a g e                                           %
 237 %                                                                             %
 238 %                                                                             %
 239 %                                                                             %
 240 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 241 %
 242 %  RegisterAVSImage() adds attributes for the AVS X image format to the list
 243 %  of supported formats.  The attributes include the image format tag, a
 244 %  method to read and/or write the format, whether the format supports the
 245 %  saving of more than one frame to the same file or blob, whether the format
 246 %  supports native in-memory I/O, and a brief description of the format.
 247 %
 248 %  The format of the RegisterAVSImage method is:
 249 %
 250 %      size_t RegisterAVSImage(void)
 251 %
 252 */
 253 ModuleExport size_t RegisterAVSImage(void)
 254 {
 255   MagickInfo
 256     *entry;
 257
 258   entry=SetMagickInfo("AVS");
 259   entry->decoder=(DecodeImageHandler *) ReadAVSImage;
 260   entry->encoder=(EncodeImageHandler *) WriteAVSImage;
 261   entry->description=ConstantString("AVS X image");
 262   entry->module=ConstantString("AVS");
 263   (void) RegisterMagickInfo(entry);
 264   return(MagickImageCoderSignature);
 265 }
 266 \f
 267 /*
 268 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 269 %                                                                             %
 270 %                                                                             %
 271 %                                                                             %
 272 %   U n r e g i s t e r A V S I m a g e                                       %
 273 %                                                                             %
 274 %                                                                             %
 275 %                                                                             %
 276 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 277 %
 278 %  UnregisterAVSImage() removes format registrations made by the
 279 %  AVS module from the list of supported formats.
 280 %
 281 %  The format of the UnregisterAVSImage method is:
 282 %
 283 %      UnregisterAVSImage(void)
 284 %
 285 */
 286 ModuleExport void UnregisterAVSImage(void)
 287 {
 288   (void) UnregisterMagickInfo("AVS");
 289 }
 290 \f
 291 /*
 292 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 293 %                                                                             %
 294 %                                                                             %
 295 %                                                                             %
 296 %   W r i t e A V S I m a g e                                                 %
 297 %                                                                             %
 298 %                                                                             %
 299 %                                                                             %
 300 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 301 %
 302 %  WriteAVSImage() writes an image to a file in AVS X image format.
 303 %
 304 %  The format of the WriteAVSImage method is:
 305 %
 306 %      MagickBooleanType WriteAVSImage(const ImageInfo *image_info,Image *image)
 307 %
 308 %  A description of each parameter follows.
 309 %
 310 %    o image_info: the image info.
 311 %
 312 %    o image:  The image.
 313 %
 314 */
 315 static MagickBooleanType WriteAVSImage(const ImageInfo *image_info,Image *image)
 316 {
 317   MagickBooleanType
 318     status;
 319
 320   MagickOffsetType
 321     scene;
 322
 323   register const Quantum
 324     *restrict p;
 325
 326   register ssize_t
 327     x;
 328
 329   register unsigned char
 330     *restrict q;
 331
 332   ssize_t
 333     count,
 334     y;
 335
 336   unsigned char
 337     *pixels;
 338
 339   /*
 340     Open output image file.
 341   */
 342   assert(image_info != (const ImageInfo *) NULL);
 343   assert(image_info->signature == MagickSignature);
 344   assert(image != (Image *) NULL);
 345   assert(image->signature == MagickSignature);
 346   if (image->debug != MagickFalse)
 347     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
 348   status=OpenBlob(image_info,image,WriteBinaryBlobMode,&image->exception);
 349   if (status == MagickFalse)
 350     return(status);
 351   scene=0;
 352   do
 353   {
 354     /*
 355       Write AVS header.
 356     */
 357     if (image->colorspace != RGBColorspace)
 358       (void) TransformImageColorspace(image,RGBColorspace);
 359     (void) WriteBlobMSBLong(image,(unsigned int) image->columns);
 360     (void) WriteBlobMSBLong(image,(unsigned int) image->rows);
 361     /*
 362       Allocate memory for pixels.
 363     */
 364     pixels=(unsigned char *) AcquireQuantumMemory((size_t) image->columns,
 365       4*sizeof(*pixels));
 366     if (pixels == (unsigned char *) NULL)
 367       ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
 368     /*
 369       Convert MIFF to AVS raster pixels.
 370     */
 371     for (y=0; y < (ssize_t) image->rows; y++)
 372     {
 373       p=GetVirtualPixels(image,0,y,image->columns,1,&image->exception);
 374       if (p == (const Quantum *) NULL)
 375         break;
 376       q=pixels;
 377       for (x=0; x < (ssize_t) image->columns; x++)
 378       {
 379         *q++=ScaleQuantumToChar((Quantum) (image->matte != MagickFalse ?
 380           GetPixelAlpha(image,p) : OpaqueAlpha));
 381         *q++=ScaleQuantumToChar(GetPixelRed(image,p));
 382         *q++=ScaleQuantumToChar(GetPixelGreen(image,p));
 383         *q++=ScaleQuantumToChar(GetPixelBlue(image,p));
 384         p+=GetPixelChannels(image);
 385       }
 386       count=WriteBlob(image,(size_t) (q-pixels),pixels);
 387       if (count != (ssize_t) (q-pixels))
 388         break;
 389       if (image->previous == (Image *) NULL)
 390         {
 391           status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
 392             image->rows);
 393           if (status == MagickFalse)
 394             break;
 395         }
 396     }
 397     pixels=(unsigned char *) RelinquishMagickMemory(pixels);
 398     if (GetNextImageInList(image) == (Image *) NULL)
 399       break;
 400     image=SyncNextImageInList(image);
 401     status=SetImageProgress(image,SaveImagesTag,scene++,
 402       GetImageListLength(image));
 403     if (status == MagickFalse)
 404       break;
 405   } while (image_info->adjoin != MagickFalse);
 406   (void) CloseBlob(image);
 407   return(MagickTrue);
 408 }