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         q->blue=ScaleCharToQuantum(*p++);
 176         q->green=ScaleCharToQuantum(*p++);
 177         q->red=ScaleCharToQuantum(*p++);
 178         if (*p == 254)
 179           *p=255;
 180         q->opacity=(Quantum) (QuantumRange-ScaleCharToQuantum(*p));
 181         if (q->opacity != OpaqueOpacity)
 182           image->matte=MagickTrue;
 183         p++;
 184         q++;
 185       }
 186       if (SyncAuthenticPixels(image,exception) == MagickFalse)
 187         break;
 188       if ((image->previous == (Image *) NULL) &&
 189           (SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,image->rows) == MagickFalse))
 190         break;
 191     }
 192     pixels=(unsigned char *) RelinquishMagickMemory(pixels);
 193     if (EOFBlob(image) != MagickFalse)
 194       {
 195         ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
 196           image->filename);
 197         break;
 198       }
 199     /*
 200       Proceed to next image.
 201     */
 202     if (image_info->number_scenes != 0)
 203       if (image->scene >= (image_info->scene+image_info->number_scenes-1))
 204         break;
 205     width=ReadBlobLSBLong(image);
 206     height=ReadBlobLSBLong(image);
 207     if ((width != 0UL) && (height != 0UL))
 208       {
 209         /*
 210           Allocate next image structure.
 211         */
 212         AcquireNextImage(image_info,image);
 213         if (GetNextImageInList(image) == (Image *) NULL)
 214           {
 215             image=DestroyImageList(image);
 216             return((Image *) NULL);
 217           }
 218         image=SyncNextImageInList(image);
 219         status=SetImageProgress(image,LoadImagesTag,TellBlob(image),
 220           GetBlobSize(image));
 221         if (status == MagickFalse)
 222           break;
 223       }
 224   } while ((width != 0UL) && (height != 0UL));
 225   (void) CloseBlob(image);
 226   return(GetFirstImageInList(image));
 227 }
 228 \f
 229 /*
 230 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 231 %                                                                             %
 232 %                                                                             %
 233 %                                                                             %
 234 %   R e g i s t e r A A I I m a g e                                           %
 235 %                                                                             %
 236 %                                                                             %
 237 %                                                                             %
 238 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 239 %
 240 %  RegisterAAIImage() adds attributes for the AAI Dune image format to the list
 241 %  of supported formats.  The attributes include the image format tag, a
 242 %  method to read and/or write the format, whether the format supports the
 243 %  saving of more than one frame to the same file or blob, whether the format
 244 %  supports native in-memory I/O, and a brief description of the format.
 245 %
 246 %  The format of the RegisterAAIImage method is:
 247 %
 248 %      size_t RegisterAAIImage(void)
 249 %
 250 */
 251 ModuleExport size_t RegisterAAIImage(void)
 252 {
 253   MagickInfo
 254     *entry;
 255
 256   entry=SetMagickInfo("AAI");
 257   entry->decoder=(DecodeImageHandler *) ReadAAIImage;
 258   entry->encoder=(EncodeImageHandler *) WriteAAIImage;
 259   entry->description=ConstantString("AAI Dune image");
 260   entry->module=ConstantString("AAI");
 261   (void) RegisterMagickInfo(entry);
 262   return(MagickImageCoderSignature);
 263 }
 264 \f
 265 /*
 266 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 267 %                                                                             %
 268 %                                                                             %
 269 %                                                                             %
 270 %   U n r e g i s t e r A A I I m a g e                                       %
 271 %                                                                             %
 272 %                                                                             %
 273 %                                                                             %
 274 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 275 %
 276 %  UnregisterAAIImage() removes format registrations made by the
 277 %  AAI module from the list of supported formats.
 278 %
 279 %  The format of the UnregisterAAIImage method is:
 280 %
 281 %      UnregisterAAIImage(void)
 282 %
 283 */
 284 ModuleExport void UnregisterAAIImage(void)
 285 {
 286   (void) UnregisterMagickInfo("AAI");
 287 }
 288 \f
 289 /*
 290 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 291 %                                                                             %
 292 %                                                                             %
 293 %                                                                             %
 294 %   W r i t e A A I I m a g e                                                 %
 295 %                                                                             %
 296 %                                                                             %
 297 %                                                                             %
 298 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 299 %
 300 %  WriteAAIImage() writes an image to a file in AAI Dune image format.
 301 %
 302 %  The format of the WriteAAIImage method is:
 303 %
 304 %      MagickBooleanType WriteAAIImage(const ImageInfo *image_info,Image *image)
 305 %
 306 %  A description of each parameter follows.
 307 %
 308 %    o image_info: the image info.
 309 %
 310 %    o image:  The image.
 311 %
 312 */
 313 static MagickBooleanType WriteAAIImage(const ImageInfo *image_info,Image *image)
 314 {
 315   MagickBooleanType
 316     status;
 317
 318   MagickOffsetType
 319     scene;
 320
 321   register const PixelPacket
 322     *restrict p;
 323
 324   register ssize_t
 325     x;
 326
 327   register unsigned char
 328     *restrict q;
 329
 330   ssize_t
 331     count,
 332     y;
 333
 334   unsigned char
 335     *pixels;
 336
 337   /*
 338     Open output image file.
 339   */
 340   assert(image_info != (const ImageInfo *) NULL);
 341   assert(image_info->signature == MagickSignature);
 342   assert(image != (Image *) NULL);
 343   assert(image->signature == MagickSignature);
 344   if (image->debug != MagickFalse)
 345     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
 346   status=OpenBlob(image_info,image,WriteBinaryBlobMode,&image->exception);
 347   if (status == MagickFalse)
 348     return(status);
 349   scene=0;
 350   do
 351   {
 352     /*
 353       Write AAI header.
 354     */
 355     if (image->colorspace != RGBColorspace)
 356       (void) TransformImageColorspace(image,RGBColorspace);
 357     (void) WriteBlobLSBLong(image,(unsigned int) image->columns);
 358     (void) WriteBlobLSBLong(image,(unsigned int) image->rows);
 359     /*
 360       Allocate memory for pixels.
 361     */
 362     pixels=(unsigned char *) AcquireQuantumMemory((size_t) image->columns,
 363       4*sizeof(*pixels));
 364     if (pixels == (unsigned char *) NULL)
 365       ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
 366     /*
 367       Convert MIFF to AAI raster pixels.
 368     */
 369     for (y=0; y < (ssize_t) image->rows; y++)
 370     {
 371       p=GetVirtualPixels(image,0,y,image->columns,1,&image->exception);
 372       if (p == (PixelPacket *) NULL)
 373         break;
 374       q=pixels;
 375       for (x=0; x < (ssize_t) image->columns; x++)
 376       {
 377         *q++=ScaleQuantumToChar(GetBluePixelComponent(p));
 378         *q++=ScaleQuantumToChar(GetGreenPixelComponent(p));
 379         *q++=ScaleQuantumToChar(GetRedPixelComponent(p));
 380         *q=ScaleQuantumToChar((Quantum) (QuantumRange-
 381           (image->matte != MagickFalse ? p->opacity : OpaqueOpacity)));
 382         if (*q == 255)
 383           *q=254;
 384         p++;
 385         q++;
 386       }
 387       count=WriteBlob(image,(size_t) (q-pixels),pixels);
 388       if (count != (ssize_t) (q-pixels))
 389         break;
 390       if ((image->previous == (Image *) NULL) &&
 391           (SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,image->rows) == MagickFalse))
 392         break;
 393     }
 394     pixels=(unsigned char *) RelinquishMagickMemory(pixels);
 395     if (GetNextImageInList(image) == (Image *) NULL)
 396       break;
 397     image=SyncNextImageInList(image);
 398     status=SetImageProgress(image,SaveImagesTag,scene++,
 399       GetImageListLength(image));
 400     if (status == MagickFalse)
 401       break;
 402   } while (image_info->adjoin != MagickFalse);
 403   (void) CloseBlob(image);
 404   return(MagickTrue);
 405 }