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 1999-2016 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 "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,%s",&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,Image *image,
 160   char *text,ExceptionInfo *exception)
 161 {
 162   char
 163     filename[MagickPathExtent],
 164     geometry[MagickPathExtent],
 165     *p;
 166
 167   DrawInfo
 168     *draw_info;
 169
 170   Image
 171     *texture;
 172
 173   MagickBooleanType
 174     status;
 175
 176   PointInfo
 177     delta;
 178
 179   RectangleInfo
 180     page;
 181
 182   ssize_t
 183     offset;
 184
 185   TypeMetric
 186     metrics;
 187
 188   /*
 189     Open image file.
 190   */
 191   assert(image_info != (const ImageInfo *) NULL);
 192   assert(image_info->signature == MagickCoreSignature);
 193   if (image_info->debug != MagickFalse)
 194     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
 195       image_info->filename);
 196   assert(exception != (ExceptionInfo *) NULL);
 197   assert(exception->signature == MagickCoreSignature);
 198   /*
 199     Set the page geometry.
 200   */
 201   delta.x=DefaultResolution;
 202   delta.y=DefaultResolution;
 203   if ((image->resolution.x == 0.0) || (image->resolution.y == 0.0))
 204     {
 205       GeometryInfo
 206         geometry_info;
 207
 208       MagickStatusType
 209         flags;
 210
 211       flags=ParseGeometry(PSDensityGeometry,&geometry_info);
 212       image->resolution.x=geometry_info.rho;
 213       image->resolution.y=geometry_info.sigma;
 214       if ((flags & SigmaValue) == 0)
 215         image->resolution.y=image->resolution.x;
 216     }
 217   page.width=612;
 218   page.height=792;
 219   page.x=43;
 220   page.y=43;
 221   if (image_info->page != (char *) NULL)
 222     (void) ParseAbsoluteGeometry(image_info->page,&page);
 223   /*
 224     Initialize Image structure.
 225   */
 226   image->columns=(size_t) floor((((double) page.width*image->resolution.x)/
 227     delta.x)+0.5);
 228   image->rows=(size_t) floor((((double) page.height*image->resolution.y)/
 229     delta.y)+0.5);
 230   status=SetImageExtent(image,image->columns,image->rows,exception);
 231   if (status == MagickFalse)
 232     return(DestroyImageList(image));
 233   image->page.x=0;
 234   image->page.y=0;
 235   texture=(Image *) NULL;
 236   if (image_info->texture != (char *) NULL)
 237     {
 238       ImageInfo
 239         *read_info;
 240
 241       read_info=CloneImageInfo(image_info);
 242       SetImageInfoBlob(read_info,(void *) NULL,0);
 243       (void) CopyMagickString(read_info->filename,image_info->texture,
 244         MagickPathExtent);
 245       texture=ReadImage(read_info,exception);
 246       read_info=DestroyImageInfo(read_info);
 247     }
 248   /*
 249     Annotate the text image.
 250   */
 251   (void) SetImageBackgroundColor(image,exception);
 252   draw_info=CloneDrawInfo(image_info,(DrawInfo *) NULL);
 253   (void) CloneString(&draw_info->text,image_info->filename);
 254   (void) FormatLocaleString(geometry,MagickPathExtent,"%gx%g%+g%+g",(double)
 255     image->columns,(double) image->rows,(double) page.x,(double) page.y);
 256   (void) CloneString(&draw_info->geometry,geometry);
 257   status=GetTypeMetrics(image,draw_info,&metrics,exception);
 258   if (status == MagickFalse)
 259     ThrowReaderException(TypeError,"UnableToGetTypeMetrics");
 260   page.y=(ssize_t) ceil((double) page.y+metrics.ascent-0.5);
 261   (void) FormatLocaleString(geometry,MagickPathExtent,"%gx%g%+g%+g",(double)
 262     image->columns,(double) image->rows,(double) page.x,(double) page.y);
 263   (void) CloneString(&draw_info->geometry,geometry);
 264   (void) CopyMagickString(filename,image_info->filename,MagickPathExtent);
 265   if (*draw_info->text != '\0')
 266     *draw_info->text='\0';
 267   p=text;
 268   for (offset=2*page.y; p != (char *) NULL; )
 269   {
 270     /*
 271       Annotate image with text.
 272     */
 273     (void) ConcatenateString(&draw_info->text,text);
 274     (void) ConcatenateString(&draw_info->text,"\n");
 275     offset+=(ssize_t) (metrics.ascent-metrics.descent);
 276     if (image->previous == (Image *) NULL)
 277       {
 278         status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) offset,
 279           image->rows);
 280         if (status == MagickFalse)
 281           break;
 282       }
 283     p=ReadBlobString(image,text);
 284     if ((offset < (ssize_t) image->rows) && (p != (char *) NULL))
 285       continue;
 286     if (texture != (Image *) NULL)
 287       {
 288         MagickProgressMonitor
 289           progress_monitor;
 290
 291         progress_monitor=SetImageProgressMonitor(image,
 292           (MagickProgressMonitor) NULL,image->client_data);
 293         (void) TextureImage(image,texture,exception);
 294         (void) SetImageProgressMonitor(image,progress_monitor,
 295           image->client_data);
 296       }
 297     (void) AnnotateImage(image,draw_info,exception);
 298     if (p == (char *) NULL)
 299       break;
 300     /*
 301       Page is full-- allocate next image structure.
 302     */
 303     *draw_info->text='\0';
 304     offset=2*page.y;
 305     AcquireNextImage(image_info,image,exception);
 306     if (GetNextImageInList(image) == (Image *) NULL)
 307       {
 308         image=DestroyImageList(image);
 309         return((Image *) NULL);
 310       }
 311     image->next->columns=image->columns;
 312     image->next->rows=image->rows;
 313     image=SyncNextImageInList(image);
 314     (void) CopyMagickString(image->filename,filename,MagickPathExtent);
 315     (void) SetImageBackgroundColor(image,exception);
 316     status=SetImageProgress(image,LoadImagesTag,TellBlob(image),
 317       GetBlobSize(image));
 318     if (status == MagickFalse)
 319       break;
 320   }
 321   if (texture != (Image *) NULL)
 322     {
 323       MagickProgressMonitor
 324         progress_monitor;
 325
 326       progress_monitor=SetImageProgressMonitor(image,
 327         (MagickProgressMonitor) NULL,image->client_data);
 328       (void) TextureImage(image,texture,exception);
 329       (void) SetImageProgressMonitor(image,progress_monitor,image->client_data);
 330     }
 331   (void) AnnotateImage(image,draw_info,exception);
 332   if (texture != (Image *) NULL)
 333     texture=DestroyImage(texture);
 334   draw_info=DestroyDrawInfo(draw_info);
 335   (void) CloseBlob(image);
 336   return(GetFirstImageInList(image));
 337 }
 338 \f
 339 /*
 340 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 341 %                                                                             %
 342 %                                                                             %
 343 %                                                                             %
 344 %   R e a d T X T I m a g e                                                   %
 345 %                                                                             %
 346 %                                                                             %
 347 %                                                                             %
 348 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 349 %
 350 %  ReadTXTImage() reads a text file and returns it as an image.  It allocates
 351 %  the memory necessary for the new Image structure and returns a pointer to
 352 %  the new image.
 353 %
 354 %  The format of the ReadTXTImage method is:
 355 %
 356 %      Image *ReadTXTImage(const ImageInfo *image_info,ExceptionInfo *exception)
 357 %
 358 %  A description of each parameter follows:
 359 %
 360 %    o image_info: the image info.
 361 %
 362 %    o exception: return any errors or warnings in this structure.
 363 %
 364 */
 365 static Image *ReadTXTImage(const ImageInfo *image_info,ExceptionInfo *exception)
 366 {
 367   char
 368     colorspace[MagickPathExtent],
 369     text[MagickPathExtent];
 370
 371   Image
 372     *image;
 373
 374   long
 375     x_offset,
 376     y_offset;
 377
 378   PixelInfo
 379     pixel;
 380
 381   MagickBooleanType
 382     status;
 383
 384   QuantumAny
 385     range;
 386
 387   register ssize_t
 388     i,
 389     x;
 390
 391   register Quantum
 392     *q;
 393
 394   ssize_t
 395     count,
 396     type,
 397     y;
 398
 399   unsigned long
 400     depth,
 401     height,
 402     max_value,
 403     width;
 404
 405   /*
 406     Open image file.
 407   */
 408   assert(image_info != (const ImageInfo *) NULL);
 409   assert(image_info->signature == MagickCoreSignature);
 410   if (image_info->debug != MagickFalse)
 411     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
 412       image_info->filename);
 413   assert(exception != (ExceptionInfo *) NULL);
 414   assert(exception->signature == MagickCoreSignature);
 415   image=AcquireImage(image_info,exception);
 416   status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
 417   if (status == MagickFalse)
 418     {
 419       image=DestroyImageList(image);
 420       return((Image *) NULL);
 421     }
 422   (void) ResetMagickMemory(text,0,sizeof(text));
 423   (void) ReadBlobString(image,text);
 424   if (LocaleNCompare((char *) text,MagickID,strlen(MagickID)) != 0)
 425     return(ReadTEXTImage(image_info,image,text,exception));
 426   do
 427   {
 428     width=0;
 429     height=0;
 430     max_value=0;
 431     *colorspace='\0';
 432     count=(ssize_t) sscanf(text+32,"%lu,%lu,%lu,%s",&width,&height,&max_value,
 433       colorspace);
 434     if ((count != 4) || (width == 0) || (height == 0) || (max_value == 0))
 435       ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 436     image->columns=width;
 437     image->rows=height;
 438     for (depth=1; (GetQuantumRange(depth)+1) < max_value; depth++) ;
 439     image->depth=depth;
 440     status=SetImageExtent(image,image->columns,image->rows,exception);
 441     if (status == MagickFalse)
 442       return(DestroyImageList(image));
 443     LocaleLower(colorspace);
 444     i=(ssize_t) strlen(colorspace)-1;
 445     image->alpha_trait=UndefinedPixelTrait;
 446     if ((i > 0) && (colorspace[i] == 'a'))
 447       {
 448         colorspace[i]='\0';
 449         image->alpha_trait=BlendPixelTrait;
 450       }
 451     type=ParseCommandOption(MagickColorspaceOptions,MagickFalse,colorspace);
 452     if (type < 0)
 453       ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 454     (void) SetImageBackgroundColor(image,exception);
 455     (void) SetImageColorspace(image,(ColorspaceType) type,exception);
 456     GetPixelInfo(image,&pixel);
 457     range=GetQuantumRange(image->depth);
 458     for (y=0; y < (ssize_t) image->rows; y++)
 459     {
 460       double
 461         alpha,
 462         black,
 463         blue,
 464         green,
 465         red;
 466
 467       red=0.0;
 468       green=0.0;
 469       blue=0.0;
 470       black=0.0;
 471       alpha=0.0;
 472       for (x=0; x < (ssize_t) image->columns; x++)
 473       {
 474         if (ReadBlobString(image,text) == (char *) NULL)
 475           break;
 476         switch (image->colorspace)
 477         {
 478           case GRAYColorspace:
 479           {
 480             if (image->alpha_trait != UndefinedPixelTrait)
 481               {
 482                 count=(ssize_t) sscanf(text,"%ld,%ld: (%lf%*[%,]%lf%*[%,]",
 483                   &x_offset,&y_offset,&red,&alpha);
 484                 green=red;
 485                 blue=red;
 486                 break;
 487               }
 488             count=(ssize_t) sscanf(text,"%ld,%ld: (%lf%*[%,]",&x_offset,
 489               &y_offset,&red);
 490             green=red;
 491             blue=red;
 492             break;
 493           }
 494           case CMYKColorspace:
 495           {
 496             if (image->alpha_trait != UndefinedPixelTrait)
 497               {
 498                 count=(ssize_t) sscanf(text,
 499                   "%ld,%ld: (%lf%*[%,]%lf%*[%,]%lf%*[%,]%lf%*[%,]%lf%*[%,]",
 500                   &x_offset,&y_offset,&red,&green,&blue,&black,&alpha);
 501                 break;
 502               }
 503             count=(ssize_t) sscanf(text,
 504               "%ld,%ld: (%lf%*[%,]%lf%*[%,]%lf%*[%,]%lf%*[%,]",&x_offset,
 505               &y_offset,&red,&green,&blue,&black);
 506             break;
 507           }
 508           default:
 509           {
 510             if (image->alpha_trait != UndefinedPixelTrait)
 511               {
 512                 count=(ssize_t) sscanf(text,
 513                   "%ld,%ld: (%lf%*[%,]%lf%*[%,]%lf%*[%,]%lf%*[%,]",
 514                   &x_offset,&y_offset,&red,&green,&blue,&alpha);
 515                 break;
 516               }
 517             count=(ssize_t) sscanf(text,
 518               "%ld,%ld: (%lf%*[%,]%lf%*[%,]%lf%*[%,]",&x_offset,
 519               &y_offset,&red,&green,&blue);
 520             break;
 521           }
 522         }
 523         if (strchr(text,'%') != (char *) NULL)
 524           {
 525             red*=0.01*range;
 526             green*=0.01*range;
 527             blue*=0.01*range;
 528             black*=0.01*range;
 529             alpha*=0.01*range;
 530           }
 531         if (image->colorspace == LabColorspace)
 532           {
 533             green+=(range+1)/2.0;
 534             blue+=(range+1)/2.0;
 535           }
 536         pixel.red=(MagickRealType) ScaleAnyToQuantum((QuantumAny) (red+0.5),
 537           range);
 538         pixel.green=(MagickRealType) ScaleAnyToQuantum((QuantumAny) (green+0.5),
 539           range);
 540         pixel.blue=(MagickRealType) ScaleAnyToQuantum((QuantumAny) (blue+0.5),
 541           range);
 542         pixel.black=(MagickRealType) ScaleAnyToQuantum((QuantumAny) (black+0.5),
 543           range);
 544         pixel.alpha=(MagickRealType) ScaleAnyToQuantum((QuantumAny) (alpha+0.5),
 545           range);
 546         q=GetAuthenticPixels(image,(ssize_t) x_offset,(ssize_t) y_offset,1,1,
 547           exception);
 548         if (q == (Quantum *) NULL)
 549           continue;
 550         SetPixelViaPixelInfo(image,&pixel,q);
 551         if (SyncAuthenticPixels(image,exception) == MagickFalse)
 552           break;
 553       }
 554     }
 555     (void) ReadBlobString(image,text);
 556     if (LocaleNCompare((char *) text,MagickID,strlen(MagickID)) == 0)
 557       {
 558         /*
 559           Allocate next image structure.
 560         */
 561         AcquireNextImage(image_info,image,exception);
 562         if (GetNextImageInList(image) == (Image *) NULL)
 563           {
 564             image=DestroyImageList(image);
 565             return((Image *) NULL);
 566           }
 567         image=SyncNextImageInList(image);
 568         status=SetImageProgress(image,LoadImagesTag,TellBlob(image),
 569           GetBlobSize(image));
 570         if (status == MagickFalse)
 571           break;
 572       }
 573   } while (LocaleNCompare((char *) text,MagickID,strlen(MagickID)) == 0);
 574   (void) CloseBlob(image);
 575   return(GetFirstImageInList(image));
 576 }
 577 \f
 578 /*
 579 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 580 %                                                                             %
 581 %                                                                             %
 582 %                                                                             %
 583 %   R e g i s t e r T X T I m a g e                                           %
 584 %                                                                             %
 585 %                                                                             %
 586 %                                                                             %
 587 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 588 %
 589 %  RegisterTXTImage() adds attributes for the TXT image format to the
 590 %  list of supported formats.  The attributes include the image format
 591 %  tag, a method to read and/or write the format, whether the format
 592 %  supports the saving of more than one frame to the same file or blob,
 593 %  whether the format supports native in-memory I/O, and a brief
 594 %  description of the format.
 595 %
 596 %  The format of the RegisterTXTImage method is:
 597 %
 598 %      size_t RegisterTXTImage(void)
 599 %
 600 */
 601 ModuleExport size_t RegisterTXTImage(void)
 602 {
 603   MagickInfo
 604     *entry;
 605
 606   entry=AcquireMagickInfo("TXT","SPARSE-COLOR","Sparse Color");
 607   entry->encoder=(EncodeImageHandler *) WriteTXTImage;
 608   entry->flags|=CoderRawSupportFlag;
 609   entry->flags|=CoderEndianSupportFlag;
 610   (void) RegisterMagickInfo(entry);
 611   entry=AcquireMagickInfo("TXT","TEXT","Text");
 612   entry->decoder=(DecodeImageHandler *) ReadTEXTImage;
 613   entry->format_type=ImplicitFormatType;
 614   entry->flags|=CoderRawSupportFlag;
 615   entry->flags|=CoderEndianSupportFlag;
 616   (void) RegisterMagickInfo(entry);
 617   entry=AcquireMagickInfo("TXT","TXT","Text");
 618   entry->decoder=(DecodeImageHandler *) ReadTXTImage;
 619   entry->encoder=(EncodeImageHandler *) WriteTXTImage;
 620   entry->magick=(IsImageFormatHandler *) IsTXT;
 621   (void) RegisterMagickInfo(entry);
 622   return(MagickImageCoderSignature);
 623 }
 624 \f
 625 /*
 626 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 627 %                                                                             %
 628 %                                                                             %
 629 %                                                                             %
 630 %   U n r e g i s t e r T X T I m a g e                                       %
 631 %                                                                             %
 632 %                                                                             %
 633 %                                                                             %
 634 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 635 %
 636 %  UnregisterTXTImage() removes format registrations made by the
 637 %  TXT module from the list of supported format.
 638 %
 639 %  The format of the UnregisterTXTImage method is:
 640 %
 641 %      UnregisterTXTImage(void)
 642 %
 643 */
 644 ModuleExport void UnregisterTXTImage(void)
 645 {
 646   (void) UnregisterMagickInfo("SPARSE-COLOR");
 647   (void) UnregisterMagickInfo("TEXT");
 648   (void) UnregisterMagickInfo("TXT");
 649 }
 650 \f
 651 /*
 652 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 653 %                                                                             %
 654 %                                                                             %
 655 %                                                                             %
 656 %   W r i t e T X T I m a g e                                                 %
 657 %                                                                             %
 658 %                                                                             %
 659 %                                                                             %
 660 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 661 %
 662 %  WriteTXTImage writes the pixel values as text numbers.
 663 %
 664 %  The format of the WriteTXTImage method is:
 665 %
 666 %      MagickBooleanType WriteTXTImage(const ImageInfo *image_info,
 667 %        Image *image,ExceptionInfo *exception)
 668 %
 669 %  A description of each parameter follows.
 670 %
 671 %    o image_info: the image info.
 672 %
 673 %    o image:  The image.
 674 %
 675 %    o exception: return any errors or warnings in this structure.
 676 %
 677 */
 678 static MagickBooleanType WriteTXTImage(const ImageInfo *image_info,Image *image,
 679   ExceptionInfo *exception)
 680 {
 681   char
 682     buffer[MagickPathExtent],
 683     colorspace[MagickPathExtent],
 684     tuple[MagickPathExtent];
 685
 686   MagickBooleanType
 687     status;
 688
 689   MagickOffsetType
 690     scene;
 691
 692   PixelInfo
 693     pixel;
 694
 695   register const Quantum
 696     *p;
 697
 698   register ssize_t
 699     x;
 700
 701   ssize_t
 702     y;
 703
 704   /*
 705     Open output image file.
 706   */
 707   assert(image_info != (const ImageInfo *) NULL);
 708   assert(image_info->signature == MagickCoreSignature);
 709   assert(image != (Image *) NULL);
 710   assert(image->signature == MagickCoreSignature);
 711   if (image->debug != MagickFalse)
 712     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
 713   status=OpenBlob(image_info,image,WriteBlobMode,exception);
 714   if (status == MagickFalse)
 715     return(status);
 716   scene=0;
 717   do
 718   {
 719     ComplianceType
 720       compliance;
 721
 722     const char
 723       *value;
 724
 725     (void) CopyMagickString(colorspace,CommandOptionToMnemonic(
 726       MagickColorspaceOptions,(ssize_t) image->colorspace),MagickPathExtent);
 727     LocaleLower(colorspace);
 728     image->depth=GetImageQuantumDepth(image,MagickTrue);
 729     if (image->alpha_trait != UndefinedPixelTrait)
 730       (void) ConcatenateMagickString(colorspace,"a",MagickPathExtent);
 731     compliance=NoCompliance;
 732     value=GetImageOption(image_info,"txt:compliance");
 733     if (value != (char *) NULL)
 734       compliance=(ComplianceType) ParseCommandOption(MagickComplianceOptions,
 735         MagickFalse,value);
 736     if (LocaleCompare(image_info->magick,"SPARSE-COLOR") != 0)
 737       {
 738         size_t
 739           depth;
 740
 741         depth=compliance == SVGCompliance ? image->depth :
 742           MAGICKCORE_QUANTUM_DEPTH;
 743         (void) FormatLocaleString(buffer,MagickPathExtent,
 744           "# ImageMagick pixel enumeration: %.20g,%.20g,%.20g,%s\n",(double)
 745           image->columns,(double) image->rows,(double) ((MagickOffsetType)
 746           GetQuantumRange(depth)),colorspace);
 747         (void) WriteBlobString(image,buffer);
 748       }
 749     GetPixelInfo(image,&pixel);
 750     for (y=0; y < (ssize_t) image->rows; y++)
 751     {
 752       p=GetVirtualPixels(image,0,y,image->columns,1,exception);
 753       if (p == (const Quantum *) NULL)
 754         break;
 755       for (x=0; x < (ssize_t) image->columns; x++)
 756       {
 757         GetPixelInfoPixel(image,p,&pixel);
 758         if (pixel.colorspace == LabColorspace)
 759           {
 760             pixel.green-=(QuantumRange+1)/2.0;
 761             pixel.blue-=(QuantumRange+1)/2.0;
 762           }
 763         if (LocaleCompare(image_info->magick,"SPARSE-COLOR") == 0)
 764           {
 765             /*
 766               Sparse-color format.
 767             */
 768             if (GetPixelAlpha(image,p) == (Quantum) OpaqueAlpha)
 769               {
 770                 GetColorTuple(&pixel,MagickFalse,tuple);
 771                 (void) FormatLocaleString(buffer,MagickPathExtent,
 772                   "%.20g,%.20g,",(double) x,(double) y);
 773                 (void) WriteBlobString(image,buffer);
 774                 (void) WriteBlobString(image,tuple);
 775                 (void) WriteBlobString(image," ");
 776               }
 777             p+=GetPixelChannels(image);
 778             continue;
 779           }
 780         (void) FormatLocaleString(buffer,MagickPathExtent,"%.20g,%.20g: ",
 781           (double) x,(double) y);
 782         (void) WriteBlobString(image,buffer);
 783         (void) CopyMagickString(tuple,"(",MagickPathExtent);
 784         if (pixel.colorspace == GRAYColorspace)
 785           ConcatenateColorComponent(&pixel,GrayPixelChannel,compliance,
 786             tuple);
 787         else
 788           {
 789             ConcatenateColorComponent(&pixel,RedPixelChannel,compliance,tuple);
 790             (void) ConcatenateMagickString(tuple,",",MagickPathExtent);
 791             ConcatenateColorComponent(&pixel,GreenPixelChannel,compliance,
 792               tuple);
 793             (void) ConcatenateMagickString(tuple,",",MagickPathExtent);
 794             ConcatenateColorComponent(&pixel,BluePixelChannel,compliance,tuple);
 795           }
 796         if (pixel.colorspace == CMYKColorspace)
 797           {
 798             (void) ConcatenateMagickString(tuple,",",MagickPathExtent);
 799             ConcatenateColorComponent(&pixel,BlackPixelChannel,compliance,
 800               tuple);
 801           }
 802         if (pixel.alpha_trait != UndefinedPixelTrait)
 803           {
 804             (void) ConcatenateMagickString(tuple,",",MagickPathExtent);
 805             ConcatenateColorComponent(&pixel,AlphaPixelChannel,compliance,
 806               tuple);
 807           }
 808         (void) ConcatenateMagickString(tuple,")",MagickPathExtent);
 809         (void) WriteBlobString(image,tuple);
 810         (void) WriteBlobString(image,"  ");
 811         GetColorTuple(&pixel,MagickTrue,tuple);
 812         (void) FormatLocaleString(buffer,MagickPathExtent,"%s",tuple);
 813         (void) WriteBlobString(image,buffer);
 814         (void) WriteBlobString(image,"  ");
 815         (void) QueryColorname(image,&pixel,SVGCompliance,tuple,exception);
 816         (void) WriteBlobString(image,tuple);
 817         (void) WriteBlobString(image,"\n");
 818         p+=GetPixelChannels(image);
 819       }
 820       status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
 821         image->rows);
 822       if (status == MagickFalse)
 823         break;
 824     }
 825     if (GetNextImageInList(image) == (Image *) NULL)
 826       break;
 827     image=SyncNextImageInList(image);
 828     status=SetImageProgress(image,SaveImagesTag,scene++,
 829       GetImageListLength(image));
 830     if (status == MagickFalse)
 831       break;
 832   } while (image_info->adjoin != MagickFalse);
 833   (void) CloseBlob(image);
 834   return(MagickTrue);
 835 }