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 1999-2012 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   image->alpha_trait=BlendPixelTrait;
 145   width=ReadBlobMSBLong(image);
 146   height=ReadBlobMSBLong(image);
 147   if (EOFBlob(image) != MagickFalse)
 148     ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 149   if ((width == 0UL) || (height == 0UL))
 150     ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 151   do
 152   {
 153     /*
 154       Convert AVS raster image to pixel packets.
 155     */
 156     image->columns=width;
 157     image->rows=height;
 158     image->depth=8;
 159     if ((image_info->ping != MagickFalse) && (image_info->number_scenes != 0))
 160       if (image->scene >= (image_info->scene+image_info->number_scenes-1))
 161         break;
 162     pixels=(unsigned char *) AcquireQuantumMemory(image->columns,
 163       4*sizeof(*pixels));
 164     if (pixels == (unsigned char *) NULL)
 165       ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 166     length=(size_t) 4*image->columns;
 167     for (y=0; y < (ssize_t) image->rows; y++)
 168     {
 169       count=ReadBlob(image,length,pixels);
 170       if ((size_t) count != length)
 171         ThrowReaderException(CorruptImageError,"UnableToReadImageData");
 172       p=pixels;
 173       q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
 174       if (q == (Quantum *) NULL)
 175         break;
 176       for (x=0; x < (ssize_t) image->columns; x++)
 177       {
 178         SetPixelAlpha(image,ScaleCharToQuantum(*p++),q);
 179         SetPixelRed(image,ScaleCharToQuantum(*p++),q);
 180         SetPixelGreen(image,ScaleCharToQuantum(*p++),q);
 181         SetPixelBlue(image,ScaleCharToQuantum(*p++),q);
 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,exception);
 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,
 307 %        Image *image,ExceptionInfo *exception)
 308 %
 309 %  A description of each parameter follows.
 310 %
 311 %    o image_info: the image info.
 312 %
 313 %    o image:  The image.
 314 %
 315 %    o exception: return any errors or warnings in this structure.
 316 %
 317 */
 318 static MagickBooleanType WriteAVSImage(const ImageInfo *image_info,Image *image,
 319   ExceptionInfo *exception)
 320 {
 321   MagickBooleanType
 322     status;
 323
 324   MagickOffsetType
 325     scene;
 326
 327   register const Quantum
 328     *restrict p;
 329
 330   register ssize_t
 331     x;
 332
 333   register unsigned char
 334     *restrict q;
 335
 336   ssize_t
 337     count,
 338     y;
 339
 340   unsigned char
 341     *pixels;
 342
 343   /*
 344     Open output image file.
 345   */
 346   assert(image_info != (const ImageInfo *) NULL);
 347   assert(image_info->signature == MagickSignature);
 348   assert(image != (Image *) NULL);
 349   assert(image->signature == MagickSignature);
 350   if (image->debug != MagickFalse)
 351     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
 352   assert(exception != (ExceptionInfo *) NULL);
 353   assert(exception->signature == MagickSignature);
 354   status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception);
 355   if (status == MagickFalse)
 356     return(status);
 357   scene=0;
 358   do
 359   {
 360     /*
 361       Write AVS header.
 362     */
 363     if (IssRGBCompatibleColorspace(image->colorspace) == MagickFalse)
 364       (void) TransformImageColorspace(image,sRGBColorspace,exception);
 365     (void) WriteBlobMSBLong(image,(unsigned int) image->columns);
 366     (void) WriteBlobMSBLong(image,(unsigned int) image->rows);
 367     /*
 368       Allocate memory for pixels.
 369     */
 370     pixels=(unsigned char *) AcquireQuantumMemory((size_t) image->columns,
 371       4*sizeof(*pixels));
 372     if (pixels == (unsigned char *) NULL)
 373       ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
 374     /*
 375       Convert MIFF to AVS raster pixels.
 376     */
 377     for (y=0; y < (ssize_t) image->rows; y++)
 378     {
 379       p=GetVirtualPixels(image,0,y,image->columns,1,exception);
 380       if (p == (const Quantum *) NULL)
 381         break;
 382       q=pixels;
 383       for (x=0; x < (ssize_t) image->columns; x++)
 384       {
 385         *q++=ScaleQuantumToChar((Quantum) (image->alpha_trait == BlendPixelTrait ?
 386           GetPixelAlpha(image,p) : OpaqueAlpha));
 387         *q++=ScaleQuantumToChar(GetPixelRed(image,p));
 388         *q++=ScaleQuantumToChar(GetPixelGreen(image,p));
 389         *q++=ScaleQuantumToChar(GetPixelBlue(image,p));
 390         p+=GetPixelChannels(image);
 391       }
 392       count=WriteBlob(image,(size_t) (q-pixels),pixels);
 393       if (count != (ssize_t) (q-pixels))
 394         break;
 395       if (image->previous == (Image *) NULL)
 396         {
 397           status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
 398             image->rows);
 399           if (status == MagickFalse)
 400             break;
 401         }
 402     }
 403     pixels=(unsigned char *) RelinquishMagickMemory(pixels);
 404     if (GetNextImageInList(image) == (Image *) NULL)
 405       break;
 406     image=SyncNextImageInList(image);
 407     status=SetImageProgress(image,SaveImagesTag,scene++,
 408       GetImageListLength(image));
 409     if (status == MagickFalse)
 410       break;
 411   } while (image_info->adjoin != MagickFalse);
 412   (void) CloseBlob(image);
 413   return(MagickTrue);
 414 }