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

   1 /*
   2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
   3 %                                                                             %
   4 %                                                                             %
   5 %                                                                             %
   6 %                            TTTTT  X   X  TTTTT                              %
   7 %                              T     X X     T                                %
   8 %                              T      X      T                                %
   9 %                              T     X X     T                                %
  10 %                              T    X   X    T                                %
  11 %                                                                             %
  12 %                                                                             %
  13 %                      Render Text Onto A Canvas Image.                       %
  14 %                                                                             %
  15 %                              Software Design                                %
  16 %                                   Cristy                                    %
  17 %                                 July 1992                                   %
  18 %                                                                             %
  19 %                                                                             %
  20 %  Copyright 1999-2017 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 %    https://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 "MagickCore/studio.h"
  43 #include "MagickCore/annotate.h"
  44 #include "MagickCore/attribute.h"
  45 #include "MagickCore/blob.h"
  46 #include "MagickCore/blob-private.h"
  47 #include "MagickCore/cache.h"
  48 #include "MagickCore/color.h"
  49 #include "MagickCore/color-private.h"
  50 #include "MagickCore/colorspace.h"
  51 #include "MagickCore/constitute.h"
  52 #include "MagickCore/draw.h"
  53 #include "MagickCore/exception.h"
  54 #include "MagickCore/exception-private.h"
  55 #include "MagickCore/geometry.h"
  56 #include "MagickCore/image.h"
  57 #include "MagickCore/image-private.h"
  58 #include "MagickCore/list.h"
  59 #include "MagickCore/magick.h"
  60 #include "MagickCore/memory_.h"
  61 #include "MagickCore/monitor.h"
  62 #include "MagickCore/monitor-private.h"
  63 #include "MagickCore/option.h"
  64 #include "MagickCore/pixel-accessor.h"
  65 #include "MagickCore/quantum-private.h"
  66 #include "MagickCore/static.h"
  67 #include "MagickCore/statistic.h"
  68 #include "MagickCore/string_.h"
  69 #include "MagickCore/module.h"
  70 \f
  71 /*
  72   Forward declarations.
  73 */
  74 static MagickBooleanType
  75   WriteTXTImage(const ImageInfo *,Image *,ExceptionInfo *);
  76 \f
  77 /*
  78 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  79 %                                                                             %
  80 %                                                                             %
  81 %                                                                             %
  82 %   I s T X T                                                                 %
  83 %                                                                             %
  84 %                                                                             %
  85 %                                                                             %
  86 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  87 %
  88 %  IsTXT() returns MagickTrue if the image format type, identified by the magick
  89 %  string, is TXT.
  90 %
  91 %  The format of the IsTXT method is:
  92 %
  93 %      MagickBooleanType IsTXT(const unsigned char *magick,const size_t length)
  94 %
  95 %  A description of each parameter follows:
  96 %
  97 %    o magick: compare image format pattern against these bytes.
  98 %
  99 %    o length: Specifies the length of the magick string.
 100 %
 101 */
 102 static MagickBooleanType IsTXT(const unsigned char *magick,const size_t length)
 103 {
 104 #define MagickID  "# ImageMagick pixel enumeration:"
 105
 106   char
 107     colorspace[MagickPathExtent];
 108
 109   ssize_t
 110     count;
 111
 112   unsigned long
 113     columns,
 114     depth,
 115     rows;
 116
 117   if (length < 40)
 118     return(MagickFalse);
 119   if (LocaleNCompare((const char *) magick,MagickID,strlen(MagickID)) != 0)
 120     return(MagickFalse);
 121   count=(ssize_t) sscanf((const char *) magick+32,"%lu,%lu,%lu,%32s",&columns,
 122     &rows,&depth,colorspace);
 123   if (count != 4)
 124     return(MagickFalse);
 125   return(MagickTrue);
 126 }
 127 \f
 128 /*
 129 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 130 %                                                                             %
 131 %                                                                             %
 132 %                                                                             %
 133 %   R e a d T E X T I m a g e                                                 %
 134 %                                                                             %
 135 %                                                                             %
 136 %                                                                             %
 137 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 138 %
 139 %  ReadTEXTImage() reads a text file and returns it as an image.  It
 140 %  allocates the memory necessary for the new Image structure and returns a
 141 %  pointer to the new image.
 142 %
 143 %  The format of the ReadTEXTImage method is:
 144 %
 145 %      Image *ReadTEXTImage(const ImageInfo *image_info,Image *image,
 146 %        char *text,ExceptionInfo *exception)
 147 %
 148 %  A description of each parameter follows:
 149 %
 150 %    o image_info: the image info.
 151 %
 152 %    o image: the image.
 153 %
 154 %    o text: the text storage buffer.
 155 %
 156 %    o exception: return any errors or warnings in this structure.
 157 %
 158 */
 159 static Image *ReadTEXTImage(const ImageInfo *image_info,
 160   ExceptionInfo *exception)
 161 {
 162   char
 163     filename[MagickPathExtent],
 164     geometry[MagickPathExtent],
 165     *p,
 166     text[MagickPathExtent];
 167
 168   DrawInfo
 169     *draw_info;
 170
 171   Image
 172     *image,
 173     *texture;
 174
 175   MagickBooleanType
 176     status;
 177
 178   PointInfo
 179     delta;
 180
 181   RectangleInfo
 182     page;
 183
 184   ssize_t
 185     offset;
 186
 187   TypeMetric
 188     metrics;
 189
 190   /*
 191     Open image file.
 192   */
 193   assert(image_info != (const ImageInfo *) NULL);
 194   assert(image_info->signature == MagickCoreSignature);
 195   if (image_info->debug != MagickFalse)
 196     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
 197       image_info->filename);
 198   assert(exception != (ExceptionInfo *) NULL);
 199   assert(exception->signature == MagickCoreSignature);
 200   image=AcquireImage(image_info,exception);
 201   status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
 202   if (status == MagickFalse)
 203     {
 204       image=DestroyImageList(image);
 205       return((Image *) NULL);
 206     }
 207   (void) ResetMagickMemory(text,0,sizeof(text));
 208   (void) ReadBlobString(image,text);
 209   /*
 210     Set the page geometry.
 211   */
 212   delta.x=DefaultResolution;
 213   delta.y=DefaultResolution;
 214   if ((image->resolution.x == 0.0) || (image->resolution.y == 0.0))
 215     {
 216       GeometryInfo
 217         geometry_info;
 218
 219       MagickStatusType
 220         flags;
 221
 222       flags=ParseGeometry(PSDensityGeometry,&geometry_info);
 223       image->resolution.x=geometry_info.rho;
 224       image->resolution.y=geometry_info.sigma;
 225       if ((flags & SigmaValue) == 0)
 226         image->resolution.y=image->resolution.x;
 227     }
 228   page.width=612;
 229   page.height=792;
 230   page.x=43;
 231   page.y=43;
 232   if (image_info->page != (char *) NULL)
 233     (void) ParseAbsoluteGeometry(image_info->page,&page);
 234   /*
 235     Initialize Image structure.
 236   */
 237   image->columns=(size_t) floor((((double) page.width*image->resolution.x)/
 238     delta.x)+0.5);
 239   image->rows=(size_t) floor((((double) page.height*image->resolution.y)/
 240     delta.y)+0.5);
 241   status=SetImageExtent(image,image->columns,image->rows,exception);
 242   if (status == MagickFalse)
 243     return(DestroyImageList(image));
 244   image->page.x=0;
 245   image->page.y=0;
 246   texture=(Image *) NULL;
 247   if (image_info->texture != (char *) NULL)
 248     {
 249       ImageInfo
 250         *read_info;
 251
 252       read_info=CloneImageInfo(image_info);
 253       SetImageInfoBlob(read_info,(void *) NULL,0);
 254       (void) CopyMagickString(read_info->filename,image_info->texture,
 255         MagickPathExtent);
 256       texture=ReadImage(read_info,exception);
 257       read_info=DestroyImageInfo(read_info);
 258     }
 259   /*
 260     Annotate the text image.
 261   */
 262   (void) SetImageBackgroundColor(image,exception);
 263   draw_info=CloneDrawInfo(image_info,(DrawInfo *) NULL);
 264   (void) CloneString(&draw_info->text,image_info->filename);
 265   (void) FormatLocaleString(geometry,MagickPathExtent,"%gx%g%+g%+g",(double)
 266     image->columns,(double) image->rows,(double) page.x,(double) page.y);
 267   (void) CloneString(&draw_info->geometry,geometry);
 268   status=GetTypeMetrics(image,draw_info,&metrics,exception);
 269   if (status == MagickFalse)
 270     ThrowReaderException(TypeError,"UnableToGetTypeMetrics");
 271   page.y=(ssize_t) ceil((double) page.y+metrics.ascent-0.5);
 272   (void) FormatLocaleString(geometry,MagickPathExtent,"%gx%g%+g%+g",(double)
 273     image->columns,(double) image->rows,(double) page.x,(double) page.y);
 274   (void) CloneString(&draw_info->geometry,geometry);
 275   (void) CopyMagickString(filename,image_info->filename,MagickPathExtent);
 276   if (*draw_info->text != '\0')
 277     *draw_info->text='\0';
 278   p=text;
 279   for (offset=2*page.y; p != (char *) NULL; )
 280   {
 281     /*
 282       Annotate image with text.
 283     */
 284     (void) ConcatenateString(&draw_info->text,text);
 285     (void) ConcatenateString(&draw_info->text,"\n");
 286     offset+=(ssize_t) (metrics.ascent-metrics.descent);
 287     if (image->previous == (Image *) NULL)
 288       {
 289         status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) offset,
 290           image->rows);
 291         if (status == MagickFalse)
 292           break;
 293       }
 294     p=ReadBlobString(image,text);
 295     if ((offset < (ssize_t) image->rows) && (p != (char *) NULL))
 296       continue;
 297     if (texture != (Image *) NULL)
 298       {
 299         MagickProgressMonitor
 300           progress_monitor;
 301
 302         progress_monitor=SetImageProgressMonitor(image,
 303           (MagickProgressMonitor) NULL,image->client_data);
 304         (void) TextureImage(image,texture,exception);
 305         (void) SetImageProgressMonitor(image,progress_monitor,
 306           image->client_data);
 307       }
 308     (void) AnnotateImage(image,draw_info,exception);
 309     if (p == (char *) NULL)
 310       break;
 311     /*
 312       Page is full-- allocate next image structure.
 313     */
 314     *draw_info->text='\0';
 315     offset=2*page.y;
 316     AcquireNextImage(image_info,image,exception);
 317     if (GetNextImageInList(image) == (Image *) NULL)
 318       {
 319         image=DestroyImageList(image);
 320         return((Image *) NULL);
 321       }
 322     image->next->columns=image->columns;
 323     image->next->rows=image->rows;
 324     image=SyncNextImageInList(image);
 325     (void) CopyMagickString(image->filename,filename,MagickPathExtent);
 326     (void) SetImageBackgroundColor(image,exception);
 327     status=SetImageProgress(image,LoadImagesTag,TellBlob(image),
 328       GetBlobSize(image));
 329     if (status == MagickFalse)
 330       break;
 331   }
 332   if (texture != (Image *) NULL)
 333     {
 334       MagickProgressMonitor
 335         progress_monitor;
 336
 337       progress_monitor=SetImageProgressMonitor(image,
 338         (MagickProgressMonitor) NULL,image->client_data);
 339       (void) TextureImage(image,texture,exception);
 340       (void) SetImageProgressMonitor(image,progress_monitor,image->client_data);
 341     }
 342   (void) AnnotateImage(image,draw_info,exception);
 343   if (texture != (Image *) NULL)
 344     texture=DestroyImage(texture);
 345   draw_info=DestroyDrawInfo(draw_info);
 346   (void) CloseBlob(image);
 347   return(GetFirstImageInList(image));
 348 }
 349 \f
 350 /*
 351 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 352 %                                                                             %
 353 %                                                                             %
 354 %                                                                             %
 355 %   R e a d T X T I m a g e                                                   %
 356 %                                                                             %
 357 %                                                                             %
 358 %                                                                             %
 359 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 360 %
 361 %  ReadTXTImage() reads a text file and returns it as an image.  It allocates
 362 %  the memory necessary for the new Image structure and returns a pointer to
 363 %  the new image.
 364 %
 365 %  The format of the ReadTXTImage method is:
 366 %
 367 %      Image *ReadTXTImage(const ImageInfo *image_info,ExceptionInfo *exception)
 368 %
 369 %  A description of each parameter follows:
 370 %
 371 %    o image_info: the image info.
 372 %
 373 %    o exception: return any errors or warnings in this structure.
 374 %
 375 */
 376 static Image *ReadTXTImage(const ImageInfo *image_info,ExceptionInfo *exception)
 377 {
 378   char
 379     colorspace[MagickPathExtent],
 380     text[MagickPathExtent];
 381
 382   Image
 383     *image;
 384
 385   long
 386     x_offset,
 387     y_offset;
 388
 389   PixelInfo
 390     pixel;
 391
 392   MagickBooleanType
 393     status;
 394
 395   QuantumAny
 396     range;
 397
 398   register ssize_t
 399     i,
 400     x;
 401
 402   register Quantum
 403     *q;
 404
 405   ssize_t
 406     count,
 407     type,
 408     y;
 409
 410   unsigned long
 411     depth,
 412     height,
 413     max_value,
 414     width;
 415
 416   /*
 417     Open image file.
 418   */
 419   assert(image_info != (const ImageInfo *) NULL);
 420   assert(image_info->signature == MagickCoreSignature);
 421   if (image_info->debug != MagickFalse)
 422     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
 423       image_info->filename);
 424   assert(exception != (ExceptionInfo *) NULL);
 425   assert(exception->signature == MagickCoreSignature);
 426   image=AcquireImage(image_info,exception);
 427   status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
 428   if (status == MagickFalse)
 429     {
 430       image=DestroyImageList(image);
 431       return((Image *) NULL);
 432     }
 433   (void) ResetMagickMemory(text,0,sizeof(text));
 434   (void) ReadBlobString(image,text);
 435   if (LocaleNCompare((char *) text,MagickID,strlen(MagickID)) != 0)
 436     ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 437   do
 438   {
 439     width=0;
 440     height=0;
 441     max_value=0;
 442     *colorspace='\0';
 443     count=(ssize_t) sscanf(text+32,"%lu,%lu,%lu,%32s",&width,&height,&max_value,
 444       colorspace);
 445     if ((count != 4) || (width == 0) || (height == 0) || (max_value == 0))
 446       ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 447     image->columns=width;
 448     image->rows=height;
 449     if ((max_value == 0) || (max_value > 4294967295UL))
 450       ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 451     for (depth=1; (GetQuantumRange(depth)+1) < max_value; depth++) ;
 452     image->depth=depth;
 453     status=SetImageExtent(image,image->columns,image->rows,exception);
 454     if (status == MagickFalse)
 455       return(DestroyImageList(image));
 456     LocaleLower(colorspace);
 457     i=(ssize_t) strlen(colorspace)-1;
 458     image->alpha_trait=UndefinedPixelTrait;
 459     if ((i > 0) && (colorspace[i] == 'a'))
 460       {
 461         colorspace[i]='\0';
 462         image->alpha_trait=BlendPixelTrait;
 463       }
 464     type=ParseCommandOption(MagickColorspaceOptions,MagickFalse,colorspace);
 465     if (type < 0)
 466       ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 467     (void) SetImageBackgroundColor(image,exception);
 468     (void) SetImageColorspace(image,(ColorspaceType) type,exception);
 469     GetPixelInfo(image,&pixel);
 470     range=GetQuantumRange(image->depth);
 471     for (y=0; y < (ssize_t) image->rows; y++)
 472     {
 473       double
 474         alpha,
 475         black,
 476         blue,
 477         green,
 478         red;
 479
 480       red=0.0;
 481       green=0.0;
 482       blue=0.0;
 483       black=0.0;
 484       alpha=0.0;
 485       for (x=0; x < (ssize_t) image->columns; x++)
 486       {
 487         if (ReadBlobString(image,text) == (char *) NULL)
 488           break;
 489         switch (image->colorspace)
 490         {
 491           case GRAYColorspace:
 492           {
 493             if (image->alpha_trait != UndefinedPixelTrait)
 494               {
 495                 count=(ssize_t) sscanf(text,"%ld,%ld: (%lf%*[%,]%lf%*[%,]",
 496                   &x_offset,&y_offset,&red,&alpha);
 497                 green=red;
 498                 blue=red;
 499                 break;
 500               }
 501             count=(ssize_t) sscanf(text,"%ld,%ld: (%lf%*[%,]",&x_offset,
 502               &y_offset,&red);
 503             green=red;
 504             blue=red;
 505             break;
 506           }
 507           case CMYKColorspace:
 508           {
 509             if (image->alpha_trait != UndefinedPixelTrait)
 510               {
 511                 count=(ssize_t) sscanf(text,
 512                   "%ld,%ld: (%lf%*[%,]%lf%*[%,]%lf%*[%,]%lf%*[%,]%lf%*[%,]",
 513                   &x_offset,&y_offset,&red,&green,&blue,&black,&alpha);
 514                 break;
 515               }
 516             count=(ssize_t) sscanf(text,
 517               "%ld,%ld: (%lf%*[%,]%lf%*[%,]%lf%*[%,]%lf%*[%,]",&x_offset,
 518               &y_offset,&red,&green,&blue,&black);
 519             break;
 520           }
 521           default:
 522           {
 523             if (image->alpha_trait != UndefinedPixelTrait)
 524               {
 525                 count=(ssize_t) sscanf(text,
 526                   "%ld,%ld: (%lf%*[%,]%lf%*[%,]%lf%*[%,]%lf%*[%,]",
 527                   &x_offset,&y_offset,&red,&green,&blue,&alpha);
 528                 break;
 529               }
 530             count=(ssize_t) sscanf(text,
 531               "%ld,%ld: (%lf%*[%,]%lf%*[%,]%lf%*[%,]",&x_offset,
 532               &y_offset,&red,&green,&blue);
 533             break;
 534           }
 535         }
 536         if (strchr(text,'%') != (char *) NULL)
 537           {
 538             red*=0.01*range;
 539             green*=0.01*range;
 540             blue*=0.01*range;
 541             black*=0.01*range;
 542             alpha*=0.01*range;
 543           }
 544         if (image->colorspace == LabColorspace)
 545           {
 546             green+=(range+1)/2.0;
 547             blue+=(range+1)/2.0;
 548           }
 549         pixel.red=(MagickRealType) ScaleAnyToQuantum((QuantumAny) (red+0.5),
 550           range);
 551         pixel.green=(MagickRealType) ScaleAnyToQuantum((QuantumAny) (green+0.5),
 552           range);
 553         pixel.blue=(MagickRealType) ScaleAnyToQuantum((QuantumAny) (blue+0.5),
 554           range);
 555         pixel.black=(MagickRealType) ScaleAnyToQuantum((QuantumAny) (black+0.5),
 556           range);
 557         pixel.alpha=(MagickRealType) ScaleAnyToQuantum((QuantumAny) (alpha+0.5),
 558           range);
 559         q=GetAuthenticPixels(image,(ssize_t) x_offset,(ssize_t) y_offset,1,1,
 560           exception);
 561         if (q == (Quantum *) NULL)
 562           continue;
 563         SetPixelViaPixelInfo(image,&pixel,q);
 564         if (SyncAuthenticPixels(image,exception) == MagickFalse)
 565           break;
 566       }
 567     }
 568     (void) ReadBlobString(image,text);
 569     if (LocaleNCompare((char *) text,MagickID,strlen(MagickID)) == 0)
 570       {
 571         /*
 572           Allocate next image structure.
 573         */
 574         AcquireNextImage(image_info,image,exception);
 575         if (GetNextImageInList(image) == (Image *) NULL)
 576           {
 577             image=DestroyImageList(image);
 578             return((Image *) NULL);
 579           }
 580         image=SyncNextImageInList(image);
 581         status=SetImageProgress(image,LoadImagesTag,TellBlob(image),
 582           GetBlobSize(image));
 583         if (status == MagickFalse)
 584           break;
 585       }
 586   } while (LocaleNCompare((char *) text,MagickID,strlen(MagickID)) == 0);
 587   (void) CloseBlob(image);
 588   return(GetFirstImageInList(image));
 589 }
 590 \f
 591 /*
 592 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 593 %                                                                             %
 594 %                                                                             %
 595 %                                                                             %
 596 %   R e g i s t e r T X T I m a g e                                           %
 597 %                                                                             %
 598 %                                                                             %
 599 %                                                                             %
 600 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 601 %
 602 %  RegisterTXTImage() adds attributes for the TXT image format to the
 603 %  list of supported formats.  The attributes include the image format
 604 %  tag, a method to read and/or write the format, whether the format
 605 %  supports the saving of more than one frame to the same file or blob,
 606 %  whether the format supports native in-memory I/O, and a brief
 607 %  description of the format.
 608 %
 609 %  The format of the RegisterTXTImage method is:
 610 %
 611 %      size_t RegisterTXTImage(void)
 612 %
 613 */
 614 ModuleExport size_t RegisterTXTImage(void)
 615 {
 616   MagickInfo
 617     *entry;
 618
 619   entry=AcquireMagickInfo("TXT","SPARSE-COLOR","Sparse Color");
 620   entry->encoder=(EncodeImageHandler *) WriteTXTImage;
 621   entry->flags|=CoderRawSupportFlag;
 622   entry->flags|=CoderEndianSupportFlag;
 623   (void) RegisterMagickInfo(entry);
 624   entry=AcquireMagickInfo("TXT","TEXT","Text");
 625   entry->decoder=(DecodeImageHandler *) ReadTEXTImage;
 626   entry->format_type=ImplicitFormatType;
 627   entry->flags|=CoderRawSupportFlag;
 628   entry->flags|=CoderEndianSupportFlag;
 629   (void) RegisterMagickInfo(entry);
 630   entry=AcquireMagickInfo("TXT","TXT","Text");
 631   entry->decoder=(DecodeImageHandler *) ReadTXTImage;
 632   entry->encoder=(EncodeImageHandler *) WriteTXTImage;
 633   entry->magick=(IsImageFormatHandler *) IsTXT;
 634   (void) RegisterMagickInfo(entry);
 635   return(MagickImageCoderSignature);
 636 }
 637 \f
 638 /*
 639 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 640 %                                                                             %
 641 %                                                                             %
 642 %                                                                             %
 643 %   U n r e g i s t e r T X T I m a g e                                       %
 644 %                                                                             %
 645 %                                                                             %
 646 %                                                                             %
 647 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 648 %
 649 %  UnregisterTXTImage() removes format registrations made by the
 650 %  TXT module from the list of supported format.
 651 %
 652 %  The format of the UnregisterTXTImage method is:
 653 %
 654 %      UnregisterTXTImage(void)
 655 %
 656 */
 657 ModuleExport void UnregisterTXTImage(void)
 658 {
 659   (void) UnregisterMagickInfo("SPARSE-COLOR");
 660   (void) UnregisterMagickInfo("TEXT");
 661   (void) UnregisterMagickInfo("TXT");
 662 }
 663 \f
 664 /*
 665 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 666 %                                                                             %
 667 %                                                                             %
 668 %                                                                             %
 669 %   W r i t e T X T I m a g e                                                 %
 670 %                                                                             %
 671 %                                                                             %
 672 %                                                                             %
 673 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 674 %
 675 %  WriteTXTImage writes the pixel values as text numbers.
 676 %
 677 %  The format of the WriteTXTImage method is:
 678 %
 679 %      MagickBooleanType WriteTXTImage(const ImageInfo *image_info,
 680 %        Image *image,ExceptionInfo *exception)
 681 %
 682 %  A description of each parameter follows.
 683 %
 684 %    o image_info: the image info.
 685 %
 686 %    o image:  The image.
 687 %
 688 %    o exception: return any errors or warnings in this structure.
 689 %
 690 */
 691 static MagickBooleanType WriteTXTImage(const ImageInfo *image_info,Image *image,
 692   ExceptionInfo *exception)
 693 {
 694   char
 695     buffer[MagickPathExtent],
 696     colorspace[MagickPathExtent],
 697     tuple[MagickPathExtent];
 698
 699   MagickBooleanType
 700     status;
 701
 702   MagickOffsetType
 703     scene;
 704
 705   PixelInfo
 706     pixel;
 707
 708   register const Quantum
 709     *p;
 710
 711   register ssize_t
 712     x;
 713
 714   ssize_t
 715     y;
 716
 717   /*
 718     Open output image file.
 719   */
 720   assert(image_info != (const ImageInfo *) NULL);
 721   assert(image_info->signature == MagickCoreSignature);
 722   assert(image != (Image *) NULL);
 723   assert(image->signature == MagickCoreSignature);
 724   if (image->debug != MagickFalse)
 725     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
 726   status=OpenBlob(image_info,image,WriteBlobMode,exception);
 727   if (status == MagickFalse)
 728     return(status);
 729   scene=0;
 730   do
 731   {
 732     ComplianceType
 733       compliance;
 734
 735     const char
 736       *value;
 737
 738     (void) CopyMagickString(colorspace,CommandOptionToMnemonic(
 739       MagickColorspaceOptions,(ssize_t) image->colorspace),MagickPathExtent);
 740     LocaleLower(colorspace);
 741     image->depth=GetImageQuantumDepth(image,MagickTrue);
 742     if (image->alpha_trait != UndefinedPixelTrait)
 743       (void) ConcatenateMagickString(colorspace,"a",MagickPathExtent);
 744     compliance=NoCompliance;
 745     value=GetImageOption(image_info,"txt:compliance");
 746     if (value != (char *) NULL)
 747       compliance=(ComplianceType) ParseCommandOption(MagickComplianceOptions,
 748         MagickFalse,value);
 749     if (LocaleCompare(image_info->magick,"SPARSE-COLOR") != 0)
 750       {
 751         size_t
 752           depth;
 753
 754         depth=compliance == SVGCompliance ? image->depth :
 755           MAGICKCORE_QUANTUM_DEPTH;
 756         (void) FormatLocaleString(buffer,MagickPathExtent,
 757           "# ImageMagick pixel enumeration: %.20g,%.20g,%.20g,%s\n",(double)
 758           image->columns,(double) image->rows,(double) ((MagickOffsetType)
 759           GetQuantumRange(depth)),colorspace);
 760         (void) WriteBlobString(image,buffer);
 761       }
 762     GetPixelInfo(image,&pixel);
 763     for (y=0; y < (ssize_t) image->rows; y++)
 764     {
 765       p=GetVirtualPixels(image,0,y,image->columns,1,exception);
 766       if (p == (const Quantum *) NULL)
 767         break;
 768       for (x=0; x < (ssize_t) image->columns; x++)
 769       {
 770         GetPixelInfoPixel(image,p,&pixel);
 771         if (pixel.colorspace == LabColorspace)
 772           {
 773             pixel.green-=(QuantumRange+1)/2.0;
 774             pixel.blue-=(QuantumRange+1)/2.0;
 775           }
 776         if (LocaleCompare(image_info->magick,"SPARSE-COLOR") == 0)
 777           {
 778             /*
 779               Sparse-color format.
 780             */
 781             if (GetPixelAlpha(image,p) == (Quantum) OpaqueAlpha)
 782               {
 783                 GetColorTuple(&pixel,MagickFalse,tuple);
 784                 (void) FormatLocaleString(buffer,MagickPathExtent,
 785                   "%.20g,%.20g,",(double) x,(double) y);
 786                 (void) WriteBlobString(image,buffer);
 787                 (void) WriteBlobString(image,tuple);
 788                 (void) WriteBlobString(image," ");
 789               }
 790             p+=GetPixelChannels(image);
 791             continue;
 792           }
 793         (void) FormatLocaleString(buffer,MagickPathExtent,"%.20g,%.20g: ",
 794           (double) x,(double) y);
 795         (void) WriteBlobString(image,buffer);
 796         (void) CopyMagickString(tuple,"(",MagickPathExtent);
 797         if (pixel.colorspace == GRAYColorspace)
 798           ConcatenateColorComponent(&pixel,GrayPixelChannel,compliance,tuple);
 799         else
 800           {
 801             ConcatenateColorComponent(&pixel,RedPixelChannel,compliance,tuple);
 802             (void) ConcatenateMagickString(tuple,",",MagickPathExtent);
 803             ConcatenateColorComponent(&pixel,GreenPixelChannel,compliance,
 804               tuple);
 805             (void) ConcatenateMagickString(tuple,",",MagickPathExtent);
 806             ConcatenateColorComponent(&pixel,BluePixelChannel,compliance,tuple);
 807           }
 808         if (pixel.colorspace == CMYKColorspace)
 809           {
 810             (void) ConcatenateMagickString(tuple,",",MagickPathExtent);
 811             ConcatenateColorComponent(&pixel,BlackPixelChannel,compliance,
 812               tuple);
 813           }
 814         if (pixel.alpha_trait != UndefinedPixelTrait)
 815           {
 816             (void) ConcatenateMagickString(tuple,",",MagickPathExtent);
 817             ConcatenateColorComponent(&pixel,AlphaPixelChannel,compliance,
 818               tuple);
 819           }
 820         (void) ConcatenateMagickString(tuple,")",MagickPathExtent);
 821         (void) WriteBlobString(image,tuple);
 822         (void) WriteBlobString(image,"  ");
 823         GetColorTuple(&pixel,MagickTrue,tuple);
 824         (void) FormatLocaleString(buffer,MagickPathExtent,"%s",tuple);
 825         (void) WriteBlobString(image,buffer);
 826         (void) WriteBlobString(image,"  ");
 827         (void) QueryColorname(image,&pixel,SVGCompliance,tuple,exception);
 828         (void) WriteBlobString(image,tuple);
 829         (void) WriteBlobString(image,"\n");
 830         p+=GetPixelChannels(image);
 831       }
 832       status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
 833         image->rows);
 834       if (status == MagickFalse)
 835         break;
 836     }
 837     if (GetNextImageInList(image) == (Image *) NULL)
 838       break;
 839     image=SyncNextImageInList(image);
 840     status=SetImageProgress(image,SaveImagesTag,scene++,
 841       GetImageListLength(image));
 842     if (status == MagickFalse)
 843       break;
 844   } while (image_info->adjoin != MagickFalse);
 845   (void) CloseBlob(image);
 846   return(MagickTrue);
 847 }