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     width=0;
 425     height=0;
 426     max_value=0;
 427     *colorspace='\0';
 428     count=(ssize_t) sscanf(text+32,"%lu,%lu,%lu,%s",&width,&height,&max_value,
 429       colorspace);
 430     if ((count != 4) || (width == 0) || (height == 0) || (max_value == 0))
 431       ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 432     image->columns=width;
 433     image->rows=height;
 434     for (depth=1; (GetQuantumRange(depth)+1) < max_value; depth++) ;
 435     image->depth=depth;
 436     LocaleLower(colorspace);
 437     i=(ssize_t) strlen(colorspace)-1;
 438     image->alpha_trait=UndefinedPixelTrait;
 439     if ((i > 0) && (colorspace[i] == 'a'))
 440       {
 441         colorspace[i]='\0';
 442         image->alpha_trait=BlendPixelTrait;
 443       }
 444     type=ParseCommandOption(MagickColorspaceOptions,MagickFalse,colorspace);
 445     if (type < 0)
 446       ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 447     (void) SetImageBackgroundColor(image,exception);
 448     (void) SetImageColorspace(image,(ColorspaceType) type,exception);
 449     GetPixelInfo(image,&pixel);
 450     range=GetQuantumRange(image->depth);
 451     for (y=0; y < (ssize_t) image->rows; y++)
 452     {
 453       double
 454         alpha,
 455         black,
 456         blue,
 457         green,
 458         red;
 459
 460       red=0.0;
 461       green=0.0;
 462       blue=0.0;
 463       black=0.0;
 464       alpha=0.0;
 465       for (x=0; x < (ssize_t) image->columns; x++)
 466       {
 467         if (ReadBlobString(image,text) == (char *) NULL)
 468           break;
 469         switch (image->colorspace)
 470         {
 471           case GRAYColorspace:
 472           {
 473             if (image->alpha_trait == BlendPixelTrait)
 474               {
 475                 count=(ssize_t) sscanf(text,"%ld,%ld: (%lf%*[%,]%lf%*[%,]",
 476                   &x_offset,&y_offset,&red,&alpha);
 477                 green=red;
 478                 blue=red;
 479                 break;
 480               }
 481             count=(ssize_t) sscanf(text,"%ld,%ld: (%lf%*[%,]",&x_offset,
 482               &y_offset,&red);
 483             green=red;
 484             blue=red;
 485             break;
 486           }
 487           case CMYKColorspace:
 488           {
 489             if (image->alpha_trait == BlendPixelTrait)
 490               {
 491                 count=(ssize_t) sscanf(text,
 492                   "%ld,%ld: (%lf%*[%,]%lf%*[%,]%lf%*[%,]%lf%*[%,]%lf%*[%,]",
 493                   &x_offset,&y_offset,&red,&green,&blue,&black,&alpha);
 494                 break;
 495               }
 496             count=(ssize_t) sscanf(text,
 497               "%ld,%ld: (%lf%*[%,]%lf%*[%,]%lf%*[%,]%lf%*[%,]",&x_offset,
 498               &y_offset,&red,&green,&blue,&black);
 499             break;
 500           }
 501           default:
 502           {
 503             if (image->alpha_trait == BlendPixelTrait)
 504               {
 505                 count=(ssize_t) sscanf(text,
 506                   "%ld,%ld: (%lf%*[%,]%lf%*[%,]%lf%*[%,]%lf%*[%,]",
 507                   &x_offset,&y_offset,&red,&green,&blue,&alpha);
 508                 break;
 509               }
 510             count=(ssize_t) sscanf(text,
 511               "%ld,%ld: (%lf%*[%,]%lf%*[%,]%lf%*[%,]",&x_offset,
 512               &y_offset,&red,&green,&blue);
 513             break;
 514           }
 515         }
 516         if (strchr(text,'%') != (char *) NULL)
 517           {
 518             red*=0.01*range;
 519             green*=0.01*range;
 520             blue*=0.01*range;
 521             black*=0.01*range;
 522             alpha*=0.01*range;
 523           }
 524         if (image->colorspace == LabColorspace)
 525           {
 526             green+=(range+1)/2.0;
 527             blue+=(range+1)/2.0;
 528           }
 529         pixel.red=ScaleAnyToQuantum((QuantumAny) (red+0.5),range);
 530         pixel.green=ScaleAnyToQuantum((QuantumAny) (green+0.5),range);
 531         pixel.blue=ScaleAnyToQuantum((QuantumAny) (blue+0.5),range);
 532         pixel.black=ScaleAnyToQuantum((QuantumAny) (black+0.5),range);
 533         pixel.alpha=ScaleAnyToQuantum((QuantumAny) (alpha+0.5),range);
 534         q=GetAuthenticPixels(image,x_offset,y_offset,1,1,exception);
 535         if (q == (Quantum *) NULL)
 536           continue;
 537         SetPixelInfoPixel(image,&pixel,q);
 538         if (SyncAuthenticPixels(image,exception) == MagickFalse)
 539           break;
 540       }
 541     }
 542     (void) ReadBlobString(image,text);
 543     if (LocaleNCompare((char *) text,MagickID,strlen(MagickID)) == 0)
 544       {
 545         /*
 546           Allocate next image structure.
 547         */
 548         AcquireNextImage(image_info,image,exception);
 549         if (GetNextImageInList(image) == (Image *) NULL)
 550           {
 551             image=DestroyImageList(image);
 552             return((Image *) NULL);
 553           }
 554         image=SyncNextImageInList(image);
 555         status=SetImageProgress(image,LoadImagesTag,TellBlob(image),
 556           GetBlobSize(image));
 557         if (status == MagickFalse)
 558           break;
 559       }
 560   } while (LocaleNCompare((char *) text,MagickID,strlen(MagickID)) == 0);
 561   (void) CloseBlob(image);
 562   return(GetFirstImageInList(image));
 563 }
 564 \f
 565 /*
 566 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 567 %                                                                             %
 568 %                                                                             %
 569 %                                                                             %
 570 %   R e g i s t e r T X T I m a g e                                           %
 571 %                                                                             %
 572 %                                                                             %
 573 %                                                                             %
 574 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 575 %
 576 %  RegisterTXTImage() adds attributes for the TXT image format to the
 577 %  list of supported formats.  The attributes include the image format
 578 %  tag, a method to read and/or write the format, whether the format
 579 %  supports the saving of more than one frame to the same file or blob,
 580 %  whether the format supports native in-memory I/O, and a brief
 581 %  description of the format.
 582 %
 583 %  The format of the RegisterTXTImage method is:
 584 %
 585 %      size_t RegisterTXTImage(void)
 586 %
 587 */
 588 ModuleExport size_t RegisterTXTImage(void)
 589 {
 590   MagickInfo
 591     *entry;
 592
 593   entry=SetMagickInfo("SPARSE-COLOR");
 594   entry->encoder=(EncodeImageHandler *) WriteTXTImage;
 595   entry->raw=MagickTrue;
 596   entry->endian_support=MagickTrue;
 597   entry->description=ConstantString("Sparse Color");
 598   entry->module=ConstantString("TXT");
 599   (void) RegisterMagickInfo(entry);
 600   entry=SetMagickInfo("TEXT");
 601   entry->decoder=(DecodeImageHandler *) ReadTXTImage;
 602   entry->encoder=(EncodeImageHandler *) WriteTXTImage;
 603   entry->raw=MagickTrue;
 604   entry->endian_support=MagickTrue;
 605   entry->description=ConstantString("Text");
 606   entry->module=ConstantString("TXT");
 607   (void) RegisterMagickInfo(entry);
 608   entry=SetMagickInfo("TXT");
 609   entry->decoder=(DecodeImageHandler *) ReadTXTImage;
 610   entry->encoder=(EncodeImageHandler *) WriteTXTImage;
 611   entry->description=ConstantString("Text");
 612   entry->magick=(IsImageFormatHandler *) IsTXT;
 613   entry->module=ConstantString("TXT");
 614   (void) RegisterMagickInfo(entry);
 615   return(MagickImageCoderSignature);
 616 }
 617 \f
 618 /*
 619 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 620 %                                                                             %
 621 %                                                                             %
 622 %                                                                             %
 623 %   U n r e g i s t e r T X T I m a g e                                       %
 624 %                                                                             %
 625 %                                                                             %
 626 %                                                                             %
 627 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 628 %
 629 %  UnregisterTXTImage() removes format registrations made by the
 630 %  TXT module from the list of supported format.
 631 %
 632 %  The format of the UnregisterTXTImage method is:
 633 %
 634 %      UnregisterTXTImage(void)
 635 %
 636 */
 637 ModuleExport void UnregisterTXTImage(void)
 638 {
 639   (void) UnregisterMagickInfo("SPARSE-COLOR");
 640   (void) UnregisterMagickInfo("TEXT");
 641   (void) UnregisterMagickInfo("TXT");
 642 }
 643 \f
 644 /*
 645 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 646 %                                                                             %
 647 %                                                                             %
 648 %                                                                             %
 649 %   W r i t e T X T I m a g e                                                 %
 650 %                                                                             %
 651 %                                                                             %
 652 %                                                                             %
 653 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 654 %
 655 %  WriteTXTImage writes the pixel values as text numbers.
 656 %
 657 %  The format of the WriteTXTImage method is:
 658 %
 659 %      MagickBooleanType WriteTXTImage(const ImageInfo *image_info,
 660 %        Image *image,ExceptionInfo *exception)
 661 %
 662 %  A description of each parameter follows.
 663 %
 664 %    o image_info: the image info.
 665 %
 666 %    o image:  The image.
 667 %
 668 %    o exception: return any errors or warnings in this structure.
 669 %
 670 */
 671 static MagickBooleanType WriteTXTImage(const ImageInfo *image_info,Image *image,
 672   ExceptionInfo *exception)
 673 {
 674   char
 675     buffer[MaxTextExtent],
 676     colorspace[MaxTextExtent],
 677     tuple[MaxTextExtent];
 678
 679   MagickBooleanType
 680     status;
 681
 682   MagickOffsetType
 683     scene;
 684
 685   PixelInfo
 686     pixel;
 687
 688   register const Quantum
 689     *p;
 690
 691   register ssize_t
 692     x;
 693
 694   ssize_t
 695     y;
 696
 697   /*
 698     Open output image file.
 699   */
 700   assert(image_info != (const ImageInfo *) NULL);
 701   assert(image_info->signature == MagickSignature);
 702   assert(image != (Image *) NULL);
 703   assert(image->signature == MagickSignature);
 704   if (image->debug != MagickFalse)
 705     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
 706   status=OpenBlob(image_info,image,WriteBlobMode,exception);
 707   if (status == MagickFalse)
 708     return(status);
 709   scene=0;
 710   do
 711   {
 712     ComplianceType
 713       compliance;
 714
 715     (void) CopyMagickString(colorspace,CommandOptionToMnemonic(
 716       MagickColorspaceOptions,(ssize_t) image->colorspace),MaxTextExtent);
 717     LocaleLower(colorspace);
 718     image->depth=GetImageQuantumDepth(image,MagickTrue);
 719     if (image->alpha_trait == BlendPixelTrait)
 720       (void) ConcatenateMagickString(colorspace,"a",MaxTextExtent);
 721     compliance=NoCompliance;
 722     if (LocaleCompare(image_info->magick,"SPARSE-COLOR") != 0)
 723       {
 724         (void) FormatLocaleString(buffer,MaxTextExtent,
 725           "# ImageMagick pixel enumeration: %.20g,%.20g,%.20g,%s\n",(double)
 726           image->columns,(double) image->rows,(double) ((MagickOffsetType)
 727           GetQuantumRange(image->depth)),colorspace);
 728         (void) WriteBlobString(image,buffer);
 729         compliance=SVGCompliance;
 730       }
 731     GetPixelInfo(image,&pixel);
 732     for (y=0; y < (ssize_t) image->rows; y++)
 733     {
 734       p=GetVirtualPixels(image,0,y,image->columns,1,exception);
 735       if (p == (const Quantum *) NULL)
 736         break;
 737       for (x=0; x < (ssize_t) image->columns; x++)
 738       {
 739         GetPixelInfoPixel(image,p,&pixel);
 740         if (pixel.colorspace == LabColorspace)
 741           {
 742             pixel.green-=(QuantumRange+1)/2.0;
 743             pixel.blue-=(QuantumRange+1)/2.0;
 744           }
 745         if (LocaleCompare(image_info->magick,"SPARSE-COLOR") == 0)
 746           {
 747             /*
 748               Sparse-color format.
 749             */
 750             if (GetPixelAlpha(image,p) == (Quantum) OpaqueAlpha)
 751               {
 752                 GetColorTuple(&pixel,MagickFalse,tuple);
 753                 (void) FormatLocaleString(buffer,MaxTextExtent,"%.20g,%.20g,",
 754                   (double) x,(double) y);
 755                 (void) WriteBlobString(image,buffer);
 756                 (void) WriteBlobString(image,tuple);
 757                 (void) WriteBlobString(image," ");
 758               }
 759             p+=GetPixelChannels(image);
 760             continue;
 761           }
 762         (void) FormatLocaleString(buffer,MaxTextExtent,"%.20g,%.20g: ",(double)
 763           x,(double) y);
 764         (void) WriteBlobString(image,buffer);
 765         (void) CopyMagickString(tuple,"(",MaxTextExtent);
 766         if (pixel.colorspace == GRAYColorspace)
 767           ConcatenateColorComponent(&pixel,GrayPixelChannel,compliance,
 768             tuple);
 769         else
 770           {
 771             ConcatenateColorComponent(&pixel,RedPixelChannel,compliance,tuple);
 772             (void) ConcatenateMagickString(tuple,",",MaxTextExtent);
 773             ConcatenateColorComponent(&pixel,GreenPixelChannel,compliance,
 774               tuple);
 775             (void) ConcatenateMagickString(tuple,",",MaxTextExtent);
 776             ConcatenateColorComponent(&pixel,BluePixelChannel,compliance,tuple);
 777           }
 778         if (pixel.colorspace == CMYKColorspace)
 779           {
 780             (void) ConcatenateMagickString(tuple,",",MaxTextExtent);
 781             ConcatenateColorComponent(&pixel,BlackPixelChannel,compliance,
 782               tuple);
 783           }
 784         if (pixel.alpha_trait == BlendPixelTrait)
 785           {
 786             (void) ConcatenateMagickString(tuple,",",MaxTextExtent);
 787             ConcatenateColorComponent(&pixel,AlphaPixelChannel,compliance,
 788               tuple);
 789           }
 790         (void) ConcatenateMagickString(tuple,")",MaxTextExtent);
 791         (void) WriteBlobString(image,tuple);
 792         (void) WriteBlobString(image,"  ");
 793         GetColorTuple(&pixel,MagickTrue,tuple);
 794         (void) FormatLocaleString(buffer,MaxTextExtent,"%s",tuple);
 795         (void) WriteBlobString(image,buffer);
 796         (void) WriteBlobString(image,"  ");
 797         (void) QueryColorname(image,&pixel,SVGCompliance,tuple,exception);
 798         (void) WriteBlobString(image,tuple);
 799         (void) WriteBlobString(image,"\n");
 800         p+=GetPixelChannels(image);
 801       }
 802       status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
 803         image->rows);
 804       if (status == MagickFalse)
 805         break;
 806     }
 807     if (GetNextImageInList(image) == (Image *) NULL)
 808       break;
 809     image=SyncNextImageInList(image);
 810     status=SetImageProgress(image,SaveImagesTag,scene++,
 811       GetImageListLength(image));
 812     if (status == MagickFalse)
 813       break;
 814   } while (image_info->adjoin != MagickFalse);
 815   (void) CloseBlob(image);
 816   return(MagickTrue);
 817 }