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

   1 /*
   2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
   3 %                                                                             %
   4 %                                                                             %
   5 %                                                                             %
   6 %                             AAA    AAA   IIIII                              %
   7 %                            A   A  A   A    I                                %
   8 %                            AAAAA  AAAAA    I                                %
   9 %                            A   A  A   A    I                                %
  10 %                            A   A  A   A  IIIII                              %
  11 %                                                                             %
  12 %                                                                             %
  13 %                        Read/Write AAI 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   WriteAAIImage(const ImageInfo *,Image *);
  66 \f
  67 /*
  68 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  69 %                                                                             %
  70 %                                                                             %
  71 %                                                                             %
  72 %   R e a d A A I I m a g e                                                   %
  73 %                                                                             %
  74 %                                                                             %
  75 %                                                                             %
  76 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  77 %
  78 %  ReadAAIImage() reads an AAI Dune 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 ReadAAIImage method is:
  83 %
  84 %      Image *ReadAAIImage(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 *ReadAAIImage(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 AAI Dune image.
 141   */
 142   width=ReadBlobLSBLong(image);
 143   height=ReadBlobLSBLong(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 AAI 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         SetBluePixelComponent(q,ScaleCharToQuantum(*p++));
 176         SetGreenPixelComponent(q,ScaleCharToQuantum(*p++));
 177         SetRedPixelComponent(q,ScaleCharToQuantum(*p++));
 178         if (*p == 254)
 179           *p=255;
 180         SetAlphaPixelComponent(q,ScaleCharToQuantum(*p++));
 181         if (q->opacity != OpaqueOpacity)
 182           image->matte=MagickTrue;
 183         q++;
 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=ReadBlobLSBLong(image);
 209     height=ReadBlobLSBLong(image);
 210     if ((width != 0UL) && (height != 0UL))
 211       {
 212         /*
 213           Allocate next image structure.
 214         */
 215         AcquireNextImage(image_info,image);
 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 A I I m a g e                                           %
 238 %                                                                             %
 239 %                                                                             %
 240 %                                                                             %
 241 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 242 %
 243 %  RegisterAAIImage() adds attributes for the AAI Dune 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 RegisterAAIImage method is:
 250 %
 251 %      size_t RegisterAAIImage(void)
 252 %
 253 */
 254 ModuleExport size_t RegisterAAIImage(void)
 255 {
 256   MagickInfo
 257     *entry;
 258
 259   entry=SetMagickInfo("AAI");
 260   entry->decoder=(DecodeImageHandler *) ReadAAIImage;
 261   entry->encoder=(EncodeImageHandler *) WriteAAIImage;
 262   entry->description=ConstantString("AAI Dune image");
 263   entry->module=ConstantString("AAI");
 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 A I I m a g e                                       %
 274 %                                                                             %
 275 %                                                                             %
 276 %                                                                             %
 277 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 278 %
 279 %  UnregisterAAIImage() removes format registrations made by the
 280 %  AAI module from the list of supported formats.
 281 %
 282 %  The format of the UnregisterAAIImage method is:
 283 %
 284 %      UnregisterAAIImage(void)
 285 %
 286 */
 287 ModuleExport void UnregisterAAIImage(void)
 288 {
 289   (void) UnregisterMagickInfo("AAI");
 290 }
 291 \f
 292 /*
 293 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 294 %                                                                             %
 295 %                                                                             %
 296 %                                                                             %
 297 %   W r i t e A A I I m a g e                                                 %
 298 %                                                                             %
 299 %                                                                             %
 300 %                                                                             %
 301 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 302 %
 303 %  WriteAAIImage() writes an image to a file in AAI Dune image format.
 304 %
 305 %  The format of the WriteAAIImage method is:
 306 %
 307 %      MagickBooleanType WriteAAIImage(const ImageInfo *image_info,Image *image)
 308 %
 309 %  A description of each parameter follows.
 310 %
 311 %    o image_info: the image info.
 312 %
 313 %    o image:  The image.
 314 %
 315 */
 316 static MagickBooleanType WriteAAIImage(const ImageInfo *image_info,Image *image)
 317 {
 318   MagickBooleanType
 319     status;
 320
 321   MagickOffsetType
 322     scene;
 323
 324   register const PixelPacket
 325     *restrict p;
 326
 327   register ssize_t
 328     x;
 329
 330   register unsigned char
 331     *restrict q;
 332
 333   ssize_t
 334     count,
 335     y;
 336
 337   unsigned char
 338     *pixels;
 339
 340   /*
 341     Open output image file.
 342   */
 343   assert(image_info != (const ImageInfo *) NULL);
 344   assert(image_info->signature == MagickSignature);
 345   assert(image != (Image *) NULL);
 346   assert(image->signature == MagickSignature);
 347   if (image->debug != MagickFalse)
 348     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
 349   status=OpenBlob(image_info,image,WriteBinaryBlobMode,&image->exception);
 350   if (status == MagickFalse)
 351     return(status);
 352   scene=0;
 353   do
 354   {
 355     /*
 356       Write AAI header.
 357     */
 358     if (image->colorspace != RGBColorspace)
 359       (void) TransformImageColorspace(image,RGBColorspace);
 360     (void) WriteBlobLSBLong(image,(unsigned int) image->columns);
 361     (void) WriteBlobLSBLong(image,(unsigned int) image->rows);
 362     /*
 363       Allocate memory for pixels.
 364     */
 365     pixels=(unsigned char *) AcquireQuantumMemory((size_t) image->columns,
 366       4*sizeof(*pixels));
 367     if (pixels == (unsigned char *) NULL)
 368       ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
 369     /*
 370       Convert MIFF to AAI raster pixels.
 371     */
 372     for (y=0; y < (ssize_t) image->rows; y++)
 373     {
 374       p=GetVirtualPixels(image,0,y,image->columns,1,&image->exception);
 375       if (p == (PixelPacket *) NULL)
 376         break;
 377       q=pixels;
 378       for (x=0; x < (ssize_t) image->columns; x++)
 379       {
 380         *q++=ScaleQuantumToChar(GetBluePixelComponent(p));
 381         *q++=ScaleQuantumToChar(GetGreenPixelComponent(p));
 382         *q++=ScaleQuantumToChar(GetRedPixelComponent(p));
 383         *q=ScaleQuantumToChar((Quantum) (QuantumRange-(image->matte !=
 384           MagickFalse ? GetOpacityPixelComponent(p) : OpaqueOpacity)));
 385         if (*q == 255)
 386           *q=254;
 387         p++;
 388         q++;
 389       }
 390       count=WriteBlob(image,(size_t) (q-pixels),pixels);
 391       if (count != (ssize_t) (q-pixels))
 392         break;
 393       if (image->previous == (Image *) NULL)
 394         {
 395           status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
 396             image->rows);
 397           if (status == MagickFalse)
 398             break;
 399         }
 400     }
 401     pixels=(unsigned char *) RelinquishMagickMemory(pixels);
 402     if (GetNextImageInList(image) == (Image *) NULL)
 403       break;
 404     image=SyncNextImageInList(image);
 405     status=SetImageProgress(image,SaveImagesTag,scene++,
 406       GetImageListLength(image));
 407     if (status == MagickFalse)
 408       break;
 409   } while (image_info->adjoin != MagickFalse);
 410   (void) CloseBlob(image);
 411   return(MagickTrue);
 412 }