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

   1 /*
   2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
   3 %                                                                             %
   4 %                                                                             %
   5 %                                                                             %
   6 %                            M   M  TTTTT  V   V                              %
   7 %                            MM MM    T    V   V                              %
   8 %                            M M M    T    V   V                              %
   9 %                            M   M    T     V V                               %
  10 %                            M   M    T      V                                %
  11 %                                                                             %
  12 %                                                                             %
  13 %                   Read/Write MTV Raytracer 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   WriteMTVImage(const ImageInfo *,Image *);
  66 \f
  67 /*
  68 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  69 %                                                                             %
  70 %                                                                             %
  71 %                                                                             %
  72 %   R e a d M T V I m a g e                                                   %
  73 %                                                                             %
  74 %                                                                             %
  75 %                                                                             %
  76 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  77 %
  78 %  ReadMTVImage() reads a MTV image file and returns it.  It allocates
  79 %  the memory necessary for the new Image structure and returns a pointer to
  80 %  the new image.
  81 %
  82 %  The format of the ReadMTVImage method is:
  83 %
  84 %      Image *ReadMTVImage(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 *ReadMTVImage(const ImageInfo *image_info,ExceptionInfo *exception)
  94 {
  95   char
  96     buffer[MaxTextExtent];
  97
  98   Image
  99     *image;
 100
 101   MagickBooleanType
 102     status;
 103
 104   register ssize_t
 105     x;
 106
 107   register PixelPacket
 108     *q;
 109
 110   register unsigned char
 111     *p;
 112
 113   ssize_t
 114     count,
 115     y;
 116
 117   unsigned char
 118     *pixels;
 119
 120   unsigned long
 121     columns,
 122     rows;
 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);
 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 MTV image.
 143   */
 144   (void) ReadBlobString(image,buffer);
 145   count=(ssize_t) sscanf(buffer,"%lu %lu\n",&columns,&rows);
 146   if (count <= 0)
 147     ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 148   do
 149   {
 150     /*
 151       Initialize image structure.
 152     */
 153     image->columns=columns;
 154     image->rows=rows;
 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     /*
 160       Convert MTV raster image to pixel packets.
 161     */
 162     pixels=(unsigned char *) AcquireQuantumMemory((size_t) image->columns,
 163       3UL*sizeof(*pixels));
 164     if (pixels == (unsigned char *) NULL)
 165       ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 166     for (y=0; y < (ssize_t) image->rows; y++)
 167     {
 168       count=(ssize_t) ReadBlob(image,(size_t) (3*image->columns),pixels);
 169       if (count != (ssize_t) (3*image->columns))
 170         ThrowReaderException(CorruptImageError,"UnableToReadImageData");
 171       p=pixels;
 172       q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
 173       if (q == (PixelPacket *) NULL)
 174         break;
 175       for (x=0; x < (ssize_t) image->columns; x++)
 176       {
 177         SetRedPixelComponent(q,ScaleCharToQuantum(*p++));
 178         SetGreenPixelComponent(q,ScaleCharToQuantum(*p++));
 179         SetBluePixelComponent(q,ScaleCharToQuantum(*p++));
 180         SetOpacityPixelComponent(q,OpaqueOpacity);
 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     *buffer='\0';
 207     (void) ReadBlobString(image,buffer);
 208     count=(ssize_t) sscanf(buffer,"%lu %lu\n",&columns,&rows);
 209     if (count > 0)
 210       {
 211         /*
 212           Allocate next image structure.
 213         */
 214         AcquireNextImage(image_info,image);
 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 (count > 0);
 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 M T V I m a g e                                           %
 237 %                                                                             %
 238 %                                                                             %
 239 %                                                                             %
 240 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 241 %
 242 %  RegisterMTVImage() adds attributes for the MTV image format to
 243 %  the list of supported formats.  The attributes include the image format
 244 %  tag, a method to read and/or write the format, whether the format
 245 %  supports the saving of more than one frame to the same file or blob,
 246 %  whether the format supports native in-memory I/O, and a brief
 247 %  description of the format.
 248 %
 249 %  The format of the RegisterMTVImage method is:
 250 %
 251 %      size_t RegisterMTVImage(void)
 252 %
 253 */
 254 ModuleExport size_t RegisterMTVImage(void)
 255 {
 256   MagickInfo
 257     *entry;
 258
 259   entry=SetMagickInfo("MTV");
 260   entry->decoder=(DecodeImageHandler *) ReadMTVImage;
 261   entry->encoder=(EncodeImageHandler *) WriteMTVImage;
 262   entry->description=ConstantString("MTV Raytracing image format");
 263   entry->module=ConstantString("MTV");
 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 M T V I m a g e                                       %
 274 %                                                                             %
 275 %                                                                             %
 276 %                                                                             %
 277 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 278 %
 279 %  UnregisterMTVImage() removes format registrations made by the
 280 %  MTV module from the list of supported formats.
 281 %
 282 %  The format of the UnregisterMTVImage method is:
 283 %
 284 %      UnregisterMTVImage(void)
 285 %
 286 */
 287 ModuleExport void UnregisterMTVImage(void)
 288 {
 289   (void) UnregisterMagickInfo("MTV");
 290 }
 291 \f
 292 /*
 293 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 294 %                                                                             %
 295 %                                                                             %
 296 %                                                                             %
 297 %   W r i t e M T V I m a g e                                                 %
 298 %                                                                             %
 299 %                                                                             %
 300 %                                                                             %
 301 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 302 %
 303 %  WriteMTVImage() writes an image to a file in red, green, and blue MTV
 304 %  rasterfile format.
 305 %
 306 %  The format of the WriteMTVImage method is:
 307 %
 308 %      MagickBooleanType WriteMTVImage(const ImageInfo *image_info,Image *image)
 309 %
 310 %  A description of each parameter follows.
 311 %
 312 %    o image_info: the image info.
 313 %
 314 %    o image:  The image.
 315 %
 316 */
 317 static MagickBooleanType WriteMTVImage(const ImageInfo *image_info,Image *image)
 318 {
 319   char
 320     buffer[MaxTextExtent];
 321
 322   MagickBooleanType
 323     status;
 324
 325   MagickOffsetType
 326     scene;
 327
 328   register const PixelPacket
 329     *p;
 330
 331   register ssize_t
 332     x;
 333
 334   register unsigned char
 335     *q;
 336
 337   ssize_t
 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   status=OpenBlob(image_info,image,WriteBinaryBlobMode,&image->exception);
 353   if (status == MagickFalse)
 354     return(status);
 355   scene=0;
 356   do
 357   {
 358     /*
 359       Allocate memory for pixels.
 360     */
 361     if (image->colorspace != RGBColorspace)
 362       (void) TransformImageColorspace(image,RGBColorspace);
 363     pixels=(unsigned char *) AcquireQuantumMemory((size_t) image->columns,
 364       3UL*sizeof(*pixels));
 365     if (pixels == (unsigned char *) NULL)
 366       ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
 367     /*
 368       Initialize raster file header.
 369     */
 370     (void) FormatLocaleString(buffer,MaxTextExtent,"%.20g %.20g\n",(double)
 371       image->columns,(double) image->rows);
 372     (void) WriteBlobString(image,buffer);
 373     for (y=0; y < (ssize_t) image->rows; y++)
 374     {
 375       p=GetVirtualPixels(image,0,y,image->columns,1,&image->exception);
 376       if (p == (const PixelPacket *) NULL)
 377         break;
 378       q=pixels;
 379       for (x=0; x < (ssize_t) image->columns; x++)
 380       {
 381         *q++=ScaleQuantumToChar(GetRedPixelComponent(p));
 382         *q++=ScaleQuantumToChar(GetGreenPixelComponent(p));
 383         *q++=ScaleQuantumToChar(GetBluePixelComponent(p));
 384         p++;
 385       }
 386       (void) WriteBlob(image,(size_t) (q-pixels),pixels);
 387       if (image->previous == (Image *) NULL)
 388         {
 389           status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
 390                 image->rows);
 391           if (status == MagickFalse)
 392             break;
 393         }
 394     }
 395     pixels=(unsigned char *) RelinquishMagickMemory(pixels);
 396     if (GetNextImageInList(image) == (Image *) NULL)
 397       break;
 398     image=SyncNextImageInList(image);
 399     status=SetImageProgress(image,SaveImagesTag,scene,
 400       GetImageListLength(image));
 401     if (status == MagickFalse)
 402       break;
 403     scene++;
 404   } while (image_info->adjoin != MagickFalse);
 405   (void) CloseBlob(image);
 406   return(MagickTrue);
 407 }