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