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 1999-2014 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[MaxTextExtent];
 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[MaxTextExtent],
 164     geometry[MaxTextExtent],
 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 == MagickSignature);
 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 == MagickSignature);
 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   image->page.x=0;
 231   image->page.y=0;
 232   texture=(Image *) NULL;
 233   if (image_info->texture != (char *) NULL)
 234     {
 235       ImageInfo
 236         *read_info;
 237
 238       read_info=CloneImageInfo(image_info);
 239       SetImageInfoBlob(read_info,(void *) NULL,0);
 240       (void) CopyMagickString(read_info->filename,image_info->texture,
 241         MaxTextExtent);
 242       texture=ReadImage(read_info,exception);
 243       read_info=DestroyImageInfo(read_info);
 244     }
 245   /*
 246     Annotate the text image.
 247   */
 248   (void) SetImageBackgroundColor(image,exception);
 249   draw_info=CloneDrawInfo(image_info,(DrawInfo *) NULL);
 250   (void) CloneString(&draw_info->text,image_info->filename);
 251   (void) FormatLocaleString(geometry,MaxTextExtent,"0x0%+ld%+ld",(long) page.x,
 252     (long) page.y);
 253   (void) CloneString(&draw_info->geometry,geometry);
 254   status=GetTypeMetrics(image,draw_info,&metrics,exception);
 255   if (status == MagickFalse)
 256     ThrowReaderException(TypeError,"UnableToGetTypeMetrics");
 257   page.y=(ssize_t) ceil((double) page.y+metrics.ascent-0.5);
 258   (void) FormatLocaleString(geometry,MaxTextExtent,"0x0%+ld%+ld",(long) page.x,
 259     (long) page.y);
 260   (void) CloneString(&draw_info->geometry,geometry);
 261   (void) CopyMagickString(filename,image_info->filename,MaxTextExtent);
 262   if (*draw_info->text != '\0')
 263     *draw_info->text='\0';
 264   p=text;
 265   for (offset=2*page.y; p != (char *) NULL; )
 266   {
 267     /*
 268       Annotate image with text.
 269     */
 270     (void) ConcatenateString(&draw_info->text,text);
 271     (void) ConcatenateString(&draw_info->text,"\n");
 272     offset+=(ssize_t) (metrics.ascent-metrics.descent);
 273     if (image->previous == (Image *) NULL)
 274       {
 275         status=SetImageProgress(image,LoadImageTag,offset,image->rows);
 276         if (status == MagickFalse)
 277           break;
 278       }
 279     p=ReadBlobString(image,text);
 280     if ((offset < (ssize_t) image->rows) && (p != (char *) NULL))
 281       continue;
 282     if (texture != (Image *) NULL)
 283       {
 284         MagickProgressMonitor
 285           progress_monitor;
 286
 287         progress_monitor=SetImageProgressMonitor(image,
 288           (MagickProgressMonitor) NULL,image->client_data);
 289         (void) TextureImage(image,texture,exception);
 290         (void) SetImageProgressMonitor(image,progress_monitor,
 291           image->client_data);
 292       }
 293     (void) AnnotateImage(image,draw_info,exception);
 294     if (p == (char *) NULL)
 295       break;
 296     /*
 297       Page is full-- allocate next image structure.
 298     */
 299     *draw_info->text='\0';
 300     offset=2*page.y;
 301     AcquireNextImage(image_info,image,exception);
 302     if (GetNextImageInList(image) == (Image *) NULL)
 303       {
 304         image=DestroyImageList(image);
 305         return((Image *) NULL);
 306       }
 307     image->next->columns=image->columns;
 308     image->next->rows=image->rows;
 309     image=SyncNextImageInList(image);
 310     (void) CopyMagickString(image->filename,filename,MaxTextExtent);
 311     (void) SetImageBackgroundColor(image,exception);
 312     status=SetImageProgress(image,LoadImagesTag,TellBlob(image),
 313       GetBlobSize(image));
 314     if (status == MagickFalse)
 315       break;
 316   }
 317   if (texture != (Image *) NULL)
 318     {
 319       MagickProgressMonitor
 320         progress_monitor;
 321
 322       progress_monitor=SetImageProgressMonitor(image,
 323         (MagickProgressMonitor) NULL,image->client_data);
 324       (void) TextureImage(image,texture,exception);
 325       (void) SetImageProgressMonitor(image,progress_monitor,image->client_data);
 326     }
 327   (void) AnnotateImage(image,draw_info,exception);
 328   if (texture != (Image *) NULL)
 329     texture=DestroyImage(texture);
 330   draw_info=DestroyDrawInfo(draw_info);
 331   (void) CloseBlob(image);
 332   return(GetFirstImageInList(image));
 333 }
 334 \f
 335 /*
 336 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 337 %                                                                             %
 338 %                                                                             %
 339 %                                                                             %
 340 %   R e a d T X T I m a g e                                                   %
 341 %                                                                             %
 342 %                                                                             %
 343 %                                                                             %
 344 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 345 %
 346 %  ReadTXTImage() reads a text file and returns it as an image.  It allocates
 347 %  the memory necessary for the new Image structure and returns a pointer to
 348 %  the new image.
 349 %
 350 %  The format of the ReadTXTImage method is:
 351 %
 352 %      Image *ReadTXTImage(const ImageInfo *image_info,ExceptionInfo *exception)
 353 %
 354 %  A description of each parameter follows:
 355 %
 356 %    o image_info: the image info.
 357 %
 358 %    o exception: return any errors or warnings in this structure.
 359 %
 360 */
 361 static Image *ReadTXTImage(const ImageInfo *image_info,ExceptionInfo *exception)
 362 {
 363   char
 364     colorspace[MaxTextExtent],
 365     text[MaxTextExtent];
 366
 367   Image
 368     *image;
 369
 370   long
 371     type,
 372     x_offset,
 373     y,
 374     y_offset;
 375
 376   PixelInfo
 377     pixel;
 378
 379   MagickBooleanType
 380     status;
 381
 382   QuantumAny
 383     range;
 384
 385   register ssize_t
 386     i,
 387     x;
 388
 389   register Quantum
 390     *q;
 391
 392   ssize_t
 393     count;
 394
 395   unsigned long
 396     depth,
 397     height,
 398     max_value,
 399     width;
 400
 401   /*
 402     Open image file.
 403   */
 404   assert(image_info != (const ImageInfo *) NULL);
 405   assert(image_info->signature == MagickSignature);
 406   if (image_info->debug != MagickFalse)
 407     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
 408       image_info->filename);
 409   assert(exception != (ExceptionInfo *) NULL);
 410   assert(exception->signature == MagickSignature);
 411   image=AcquireImage(image_info,exception);
 412   status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
 413   if (status == MagickFalse)
 414     {
 415       image=DestroyImageList(image);
 416       return((Image *) NULL);
 417     }
 418   (void) ResetMagickMemory(text,0,sizeof(text));
 419   (void) ReadBlobString(image,text);
 420   if (LocaleNCompare((char *) text,MagickID,strlen(MagickID)) != 0)
 421     return(ReadTEXTImage(image_info,image,text,exception));
 422   do
 423   {
 424     *colorspace='\0';
 425     count=(ssize_t) sscanf(text+32,"%lu,%lu,%lu,%s",&width,&height,&max_value,
 426       colorspace);
 427     if (count != 4)
 428       ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 429     image->columns=width;
 430     image->rows=height;
 431     for (depth=1; (GetQuantumRange(depth)+1) < max_value; depth++) ;
 432     image->depth=depth;
 433     LocaleLower(colorspace);
 434     i=(ssize_t) strlen(colorspace)-1;
 435     image->alpha_trait=UndefinedPixelTrait;
 436     if ((i > 0) && (colorspace[i] == 'a'))
 437       {
 438         colorspace[i]='\0';
 439         image->alpha_trait=BlendPixelTrait;
 440       }
 441     type=ParseCommandOption(MagickColorspaceOptions,MagickFalse,colorspace);
 442     if (type < 0)
 443       ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 444     (void) SetImageBackgroundColor(image,exception);
 445     (void) SetImageColorspace(image,(ColorspaceType) type,exception);
 446     GetPixelInfo(image,&pixel);
 447     range=GetQuantumRange(image->depth);
 448     for (y=0; y < (ssize_t) image->rows; y++)
 449     {
 450       double
 451         alpha,
 452         black,
 453         blue,
 454         green,
 455         red;
 456
 457       red=0.0;
 458       green=0.0;
 459       blue=0.0;
 460       black=0.0;
 461       alpha=0.0;
 462       for (x=0; x < (ssize_t) image->columns; x++)
 463       {
 464         if (ReadBlobString(image,text) == (char *) NULL)
 465           break;
 466         switch (image->colorspace)
 467         {
 468           case GRAYColorspace:
 469           {
 470             if (image->alpha_trait == BlendPixelTrait)
 471               {
 472                 count=(ssize_t) sscanf(text,"%ld,%ld: (%lf,%lf",&x_offset,
 473                   &y_offset,&red,&alpha);
 474                 green=red;
 475                 blue=red;
 476                 break;
 477               }
 478             count=(ssize_t) sscanf(text,"%ld,%ld: (%lf",&x_offset,&y_offset,
 479               &red);
 480             green=red;
 481             blue=red;
 482             break;
 483           }
 484           case CMYKColorspace:
 485           {
 486             if (image->alpha_trait == BlendPixelTrait)
 487               {
 488                 count=(ssize_t) sscanf(text,"%ld,%ld: (%lf,%lf,%lf,%lf,%lf",
 489                   &x_offset,&y_offset,&red,&green,&blue,&black,&alpha);
 490                 break;
 491               }
 492             count=(ssize_t) sscanf(text,"%ld,%ld: (%lf,%lf,%lf,%lf",&x_offset,
 493               &y_offset,&red,&green,&blue,&black);
 494             break;
 495           }
 496           default:
 497           {
 498             if (image->alpha_trait == BlendPixelTrait)
 499               {
 500                 count=(ssize_t) sscanf(text,"%ld,%ld: (%lf,%lf,%lf,%lf",
 501                   &x_offset,&y_offset,&red,&green,&blue,&alpha);
 502                 break;
 503               }
 504             count=(ssize_t) sscanf(text,"%ld,%ld: (%lf,%lf,%lf",&x_offset,
 505               &y_offset,&red,&green,&blue);
 506             break;
 507           }
 508         }
 509         if (image->colorspace == LabColorspace)
 510           {
 511             green+=(range+1)/2.0;
 512             blue+=(range+1)/2.0;
 513           }
 514         pixel.red=ScaleAnyToQuantum((QuantumAny) (red+0.5),range);
 515         pixel.green=ScaleAnyToQuantum((QuantumAny) (green+0.5),range);
 516         pixel.blue=ScaleAnyToQuantum((QuantumAny) (blue+0.5),range);
 517         pixel.black=ScaleAnyToQuantum((QuantumAny) (black+0.5),range);
 518         pixel.alpha=ScaleAnyToQuantum((QuantumAny) (alpha+0.5),range);
 519         q=GetAuthenticPixels(image,x_offset,y_offset,1,1,exception);
 520         if (q == (Quantum *) NULL)
 521           continue;
 522         SetPixelInfoPixel(image,&pixel,q);
 523         if (SyncAuthenticPixels(image,exception) == MagickFalse)
 524           break;
 525       }
 526     }
 527     (void) ReadBlobString(image,text);
 528     if (LocaleNCompare((char *) text,MagickID,strlen(MagickID)) == 0)
 529       {
 530         /*
 531           Allocate next image structure.
 532         */
 533         AcquireNextImage(image_info,image,exception);
 534         if (GetNextImageInList(image) == (Image *) NULL)
 535           {
 536             image=DestroyImageList(image);
 537             return((Image *) NULL);
 538           }
 539         image=SyncNextImageInList(image);
 540         status=SetImageProgress(image,LoadImagesTag,TellBlob(image),
 541           GetBlobSize(image));
 542         if (status == MagickFalse)
 543           break;
 544       }
 545   } while (LocaleNCompare((char *) text,MagickID,strlen(MagickID)) == 0);
 546   (void) CloseBlob(image);
 547   return(GetFirstImageInList(image));
 548 }
 549 \f
 550 /*
 551 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 552 %                                                                             %
 553 %                                                                             %
 554 %                                                                             %
 555 %   R e g i s t e r T X T I m a g e                                           %
 556 %                                                                             %
 557 %                                                                             %
 558 %                                                                             %
 559 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 560 %
 561 %  RegisterTXTImage() adds attributes for the TXT image format to the
 562 %  list of supported formats.  The attributes include the image format
 563 %  tag, a method to read and/or write the format, whether the format
 564 %  supports the saving of more than one frame to the same file or blob,
 565 %  whether the format supports native in-memory I/O, and a brief
 566 %  description of the format.
 567 %
 568 %  The format of the RegisterTXTImage method is:
 569 %
 570 %      size_t RegisterTXTImage(void)
 571 %
 572 */
 573 ModuleExport size_t RegisterTXTImage(void)
 574 {
 575   MagickInfo
 576     *entry;
 577
 578   entry=SetMagickInfo("SPARSE-COLOR");
 579   entry->encoder=(EncodeImageHandler *) WriteTXTImage;
 580   entry->raw=MagickTrue;
 581   entry->endian_support=MagickTrue;
 582   entry->description=ConstantString("Sparse Color");
 583   entry->module=ConstantString("TXT");
 584   (void) RegisterMagickInfo(entry);
 585   entry=SetMagickInfo("TEXT");
 586   entry->decoder=(DecodeImageHandler *) ReadTXTImage;
 587   entry->encoder=(EncodeImageHandler *) WriteTXTImage;
 588   entry->raw=MagickTrue;
 589   entry->endian_support=MagickTrue;
 590   entry->description=ConstantString("Text");
 591   entry->module=ConstantString("TXT");
 592   (void) RegisterMagickInfo(entry);
 593   entry=SetMagickInfo("TXT");
 594   entry->decoder=(DecodeImageHandler *) ReadTXTImage;
 595   entry->encoder=(EncodeImageHandler *) WriteTXTImage;
 596   entry->description=ConstantString("Text");
 597   entry->magick=(IsImageFormatHandler *) IsTXT;
 598   entry->module=ConstantString("TXT");
 599   (void) RegisterMagickInfo(entry);
 600   return(MagickImageCoderSignature);
 601 }
 602 \f
 603 /*
 604 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 605 %                                                                             %
 606 %                                                                             %
 607 %                                                                             %
 608 %   U n r e g i s t e r T X T I m a g e                                       %
 609 %                                                                             %
 610 %                                                                             %
 611 %                                                                             %
 612 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 613 %
 614 %  UnregisterTXTImage() removes format registrations made by the
 615 %  TXT module from the list of supported format.
 616 %
 617 %  The format of the UnregisterTXTImage method is:
 618 %
 619 %      UnregisterTXTImage(void)
 620 %
 621 */
 622 ModuleExport void UnregisterTXTImage(void)
 623 {
 624   (void) UnregisterMagickInfo("SPARSE-COLOR");
 625   (void) UnregisterMagickInfo("TEXT");
 626   (void) UnregisterMagickInfo("TXT");
 627 }
 628 \f
 629 /*
 630 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 631 %                                                                             %
 632 %                                                                             %
 633 %                                                                             %
 634 %   W r i t e T X T I m a g e                                                 %
 635 %                                                                             %
 636 %                                                                             %
 637 %                                                                             %
 638 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 639 %
 640 %  WriteTXTImage writes the pixel values as text numbers.
 641 %
 642 %  The format of the WriteTXTImage method is:
 643 %
 644 %      MagickBooleanType WriteTXTImage(const ImageInfo *image_info,
 645 %        Image *image,ExceptionInfo *exception)
 646 %
 647 %  A description of each parameter follows.
 648 %
 649 %    o image_info: the image info.
 650 %
 651 %    o image:  The image.
 652 %
 653 %    o exception: return any errors or warnings in this structure.
 654 %
 655 */
 656 static MagickBooleanType WriteTXTImage(const ImageInfo *image_info,Image *image,
 657   ExceptionInfo *exception)
 658 {
 659   char
 660     buffer[MaxTextExtent],
 661     colorspace[MaxTextExtent],
 662     tuple[MaxTextExtent];
 663
 664   MagickBooleanType
 665     status;
 666
 667   MagickOffsetType
 668     scene;
 669
 670   PixelInfo
 671     pixel;
 672
 673   register const Quantum
 674     *p;
 675
 676   register ssize_t
 677     x;
 678
 679   ssize_t
 680     y;
 681
 682   /*
 683     Open output image file.
 684   */
 685   assert(image_info != (const ImageInfo *) NULL);
 686   assert(image_info->signature == MagickSignature);
 687   assert(image != (Image *) NULL);
 688   assert(image->signature == MagickSignature);
 689   if (image->debug != MagickFalse)
 690     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
 691   status=OpenBlob(image_info,image,WriteBlobMode,exception);
 692   if (status == MagickFalse)
 693     return(status);
 694   scene=0;
 695   do
 696   {
 697     ComplianceType
 698       compliance;
 699
 700     (void) CopyMagickString(colorspace,CommandOptionToMnemonic(
 701       MagickColorspaceOptions,(ssize_t) image->colorspace),MaxTextExtent);
 702     LocaleLower(colorspace);
 703     image->depth=GetImageQuantumDepth(image,MagickTrue);
 704     if (image->alpha_trait == BlendPixelTrait)
 705       (void) ConcatenateMagickString(colorspace,"a",MaxTextExtent);
 706     compliance=NoCompliance;
 707     if (LocaleCompare(image_info->magick,"SPARSE-COLOR") != 0)
 708       {
 709         (void) FormatLocaleString(buffer,MaxTextExtent,
 710           "# ImageMagick pixel enumeration: %.20g,%.20g,%.20g,%s\n",(double)
 711           image->columns,(double) image->rows,(double) ((MagickOffsetType)
 712           GetQuantumRange(image->depth)),colorspace);
 713         (void) WriteBlobString(image,buffer);
 714         compliance=SVGCompliance;
 715       }
 716     GetPixelInfo(image,&pixel);
 717     for (y=0; y < (ssize_t) image->rows; y++)
 718     {
 719       p=GetVirtualPixels(image,0,y,image->columns,1,exception);
 720       if (p == (const Quantum *) NULL)
 721         break;
 722       for (x=0; x < (ssize_t) image->columns; x++)
 723       {
 724         GetPixelInfoPixel(image,p,&pixel);
 725         if (pixel.colorspace == LabColorspace)
 726           {
 727             pixel.green-=(QuantumRange+1)/2.0;
 728             pixel.blue-=(QuantumRange+1)/2.0;
 729           }
 730         if (LocaleCompare(image_info->magick,"SPARSE-COLOR") == 0)
 731           {
 732             /*
 733               Sparse-color format.
 734             */
 735             if (GetPixelAlpha(image,p) == (Quantum) OpaqueAlpha)
 736               {
 737                 GetColorTuple(&pixel,MagickFalse,tuple);
 738                 (void) FormatLocaleString(buffer,MaxTextExtent,"%.20g,%.20g,",
 739                   (double) x,(double) y);
 740                 (void) WriteBlobString(image,buffer);
 741                 (void) WriteBlobString(image,tuple);
 742                 (void) WriteBlobString(image," ");
 743               }
 744             p+=GetPixelChannels(image);
 745             continue;
 746           }
 747         (void) FormatLocaleString(buffer,MaxTextExtent,"%.20g,%.20g: ",(double)
 748           x,(double) y);
 749         (void) WriteBlobString(image,buffer);
 750         (void) CopyMagickString(tuple,"(",MaxTextExtent);
 751         if (pixel.colorspace == GRAYColorspace)
 752           ConcatenateColorComponent(&pixel,GrayPixelChannel,compliance,
 753             tuple);
 754         else
 755           {
 756             ConcatenateColorComponent(&pixel,RedPixelChannel,compliance,tuple);
 757             (void) ConcatenateMagickString(tuple,",",MaxTextExtent);
 758             ConcatenateColorComponent(&pixel,GreenPixelChannel,compliance,
 759               tuple);
 760             (void) ConcatenateMagickString(tuple,",",MaxTextExtent);
 761             ConcatenateColorComponent(&pixel,BluePixelChannel,compliance,tuple);
 762           }
 763         if (pixel.colorspace == CMYKColorspace)
 764           {
 765             (void) ConcatenateMagickString(tuple,",",MaxTextExtent);
 766             ConcatenateColorComponent(&pixel,BlackPixelChannel,compliance,
 767               tuple);
 768           }
 769         if (pixel.alpha_trait == BlendPixelTrait)
 770           {
 771             (void) ConcatenateMagickString(tuple,",",MaxTextExtent);
 772             ConcatenateColorComponent(&pixel,AlphaPixelChannel,compliance,
 773               tuple);
 774           }
 775         (void) ConcatenateMagickString(tuple,")",MaxTextExtent);
 776         (void) WriteBlobString(image,tuple);
 777         (void) WriteBlobString(image,"  ");
 778         GetColorTuple(&pixel,MagickTrue,tuple);
 779         (void) FormatLocaleString(buffer,MaxTextExtent,"%s",tuple);
 780         (void) WriteBlobString(image,buffer);
 781         (void) WriteBlobString(image,"  ");
 782         (void) QueryColorname(image,&pixel,SVGCompliance,tuple,exception);
 783         (void) WriteBlobString(image,tuple);
 784         (void) WriteBlobString(image,"\n");
 785         p+=GetPixelChannels(image);
 786       }
 787       status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
 788         image->rows);
 789       if (status == MagickFalse)
 790         break;
 791     }
 792     if (GetNextImageInList(image) == (Image *) NULL)
 793       break;
 794     image=SyncNextImageInList(image);
 795     status=SetImageProgress(image,SaveImagesTag,scene++,
 796       GetImageListLength(image));
 797     if (status == MagickFalse)
 798       break;
 799   } while (image_info->adjoin != MagickFalse);
 800   (void) CloseBlob(image);
 801   return(MagickTrue);
 802 }