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 ssize_t
 102     x;
 103
 104   register PixelPacket
 105     *q;
 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         q->opacity=(Quantum) (QuantumRange-ScaleCharToQuantum(*p++));
 176         q->red=ScaleCharToQuantum(*p++);
 177         q->green=ScaleCharToQuantum(*p++);
 178         q->blue=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           (SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,image->rows) == MagickFalse))
 187         break;
 188     }
 189     pixels=(unsigned char *) RelinquishMagickMemory(pixels);
 190     if (EOFBlob(image) != MagickFalse)
 191       {
 192         ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
 193           image->filename);
 194         break;
 195       }
 196     /*
 197       Proceed to next image.
 198     */
 199     if (image_info->number_scenes != 0)
 200       if (image->scene >= (image_info->scene+image_info->number_scenes-1))
 201         break;
 202     width=ReadBlobMSBLong(image);
 203     height=ReadBlobMSBLong(image);
 204     if ((width != 0UL) && (height != 0UL))
 205       {
 206         /*
 207           Allocate next image structure.
 208         */
 209         AcquireNextImage(image_info,image);
 210         if (GetNextImageInList(image) == (Image *) NULL)
 211           {
 212             image=DestroyImageList(image);
 213             return((Image *) NULL);
 214           }
 215         image=SyncNextImageInList(image);
 216         status=SetImageProgress(image,LoadImagesTag,TellBlob(image),
 217           GetBlobSize(image));
 218         if (status == MagickFalse)
 219           break;
 220       }
 221   } while ((width != 0UL) && (height != 0UL));
 222   (void) CloseBlob(image);
 223   return(GetFirstImageInList(image));
 224 }
 225 \f
 226 /*
 227 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 228 %                                                                             %
 229 %                                                                             %
 230 %                                                                             %
 231 %   R e g i s t e r A V S I m a g e                                           %
 232 %                                                                             %
 233 %                                                                             %
 234 %                                                                             %
 235 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 236 %
 237 %  RegisterAVSImage() adds attributes for the AVS X image format to the list
 238 %  of supported formats.  The attributes include the image format tag, a
 239 %  method to read and/or write the format, whether the format supports the
 240 %  saving of more than one frame to the same file or blob, whether the format
 241 %  supports native in-memory I/O, and a brief description of the format.
 242 %
 243 %  The format of the RegisterAVSImage method is:
 244 %
 245 %      size_t RegisterAVSImage(void)
 246 %
 247 */
 248 ModuleExport size_t RegisterAVSImage(void)
 249 {
 250   MagickInfo
 251     *entry;
 252
 253   entry=SetMagickInfo("AVS");
 254   entry->decoder=(DecodeImageHandler *) ReadAVSImage;
 255   entry->encoder=(EncodeImageHandler *) WriteAVSImage;
 256   entry->description=ConstantString("AVS X image");
 257   entry->module=ConstantString("AVS");
 258   (void) RegisterMagickInfo(entry);
 259   return(MagickImageCoderSignature);
 260 }
 261 \f
 262 /*
 263 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 264 %                                                                             %
 265 %                                                                             %
 266 %                                                                             %
 267 %   U n r e g i s t e r A V S I m a g e                                       %
 268 %                                                                             %
 269 %                                                                             %
 270 %                                                                             %
 271 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 272 %
 273 %  UnregisterAVSImage() removes format registrations made by the
 274 %  AVS module from the list of supported formats.
 275 %
 276 %  The format of the UnregisterAVSImage method is:
 277 %
 278 %      UnregisterAVSImage(void)
 279 %
 280 */
 281 ModuleExport void UnregisterAVSImage(void)
 282 {
 283   (void) UnregisterMagickInfo("AVS");
 284 }
 285 \f
 286 /*
 287 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 288 %                                                                             %
 289 %                                                                             %
 290 %                                                                             %
 291 %   W r i t e A V S I m a g e                                                 %
 292 %                                                                             %
 293 %                                                                             %
 294 %                                                                             %
 295 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 296 %
 297 %  WriteAVSImage() writes an image to a file in AVS X image format.
 298 %
 299 %  The format of the WriteAVSImage method is:
 300 %
 301 %      MagickBooleanType WriteAVSImage(const ImageInfo *image_info,Image *image)
 302 %
 303 %  A description of each parameter follows.
 304 %
 305 %    o image_info: the image info.
 306 %
 307 %    o image:  The image.
 308 %
 309 */
 310 static MagickBooleanType WriteAVSImage(const ImageInfo *image_info,Image *image)
 311 {
 312   MagickBooleanType
 313     status;
 314
 315   MagickOffsetType
 316     scene;
 317
 318   register const PixelPacket
 319     *restrict p;
 320
 321   register ssize_t
 322     x;
 323
 324   register unsigned char
 325     *restrict q;
 326
 327   ssize_t
 328     count,
 329     y;
 330
 331   unsigned char
 332     *pixels;
 333
 334   /*
 335     Open output image file.
 336   */
 337   assert(image_info != (const ImageInfo *) NULL);
 338   assert(image_info->signature == MagickSignature);
 339   assert(image != (Image *) NULL);
 340   assert(image->signature == MagickSignature);
 341   if (image->debug != MagickFalse)
 342     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
 343   status=OpenBlob(image_info,image,WriteBinaryBlobMode,&image->exception);
 344   if (status == MagickFalse)
 345     return(status);
 346   scene=0;
 347   do
 348   {
 349     /*
 350       Write AVS header.
 351     */
 352     if (image->colorspace != RGBColorspace)
 353       (void) TransformImageColorspace(image,RGBColorspace);
 354     (void) WriteBlobMSBLong(image,(unsigned int) image->columns);
 355     (void) WriteBlobMSBLong(image,(unsigned int) image->rows);
 356     /*
 357       Allocate memory for pixels.
 358     */
 359     pixels=(unsigned char *) AcquireQuantumMemory((size_t) image->columns,
 360       4*sizeof(*pixels));
 361     if (pixels == (unsigned char *) NULL)
 362       ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
 363     /*
 364       Convert MIFF to AVS raster pixels.
 365     */
 366     for (y=0; y < (ssize_t) image->rows; y++)
 367     {
 368       p=GetVirtualPixels(image,0,y,image->columns,1,&image->exception);
 369       if (p == (PixelPacket *) NULL)
 370         break;
 371       q=pixels;
 372       for (x=0; x < (ssize_t) image->columns; x++)
 373       {
 374         *q++=ScaleQuantumToChar((Quantum) (QuantumRange-
 375           (image->matte != MagickFalse ? p->opacity : OpaqueOpacity)));
 376         *q++=ScaleQuantumToChar(GetRedPixelComponent(p));
 377         *q++=ScaleQuantumToChar(GetGreenPixelComponent(p));
 378         *q++=ScaleQuantumToChar(GetBluePixelComponent(p));
 379         p++;
 380       }
 381       count=WriteBlob(image,(size_t) (q-pixels),pixels);
 382       if (count != (ssize_t) (q-pixels))
 383         break;
 384       if ((image->previous == (Image *) NULL) &&
 385           (SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,image->rows) == MagickFalse))
 386         break;
 387     }
 388     pixels=(unsigned char *) RelinquishMagickMemory(pixels);
 389     if (GetNextImageInList(image) == (Image *) NULL)
 390       break;
 391     image=SyncNextImageInList(image);
 392     status=SetImageProgress(image,SaveImagesTag,scene++,
 393       GetImageListLength(image));
 394     if (status == MagickFalse)
 395       break;
 396   } while (image_info->adjoin != MagickFalse);
 397   (void) CloseBlob(image);
 398   return(MagickTrue);
 399 }