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

   1 /*
   2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
   3 %                                                                             %
   4 %                                                                             %
   5 %                                                                             %
   6 %                            TTTTT  TTTTT  FFFFF                              %
   7 %                              T      T    F                                  %
   8 %                              T      T    FFF                                %
   9 %                              T      T    F                                  %
  10 %                              T      T    F                                  %
  11 %                                                                             %
  12 %                                                                             %
  13 %             Return A Preview For A TrueType or Postscript Font              %
  14 %                                                                             %
  15 %                              Software Design                                %
  16 %                                John Cristy                                  %
  17 %                                 July 1992                                   %
  18 %                                                                             %
  19 %                                                                             %
  20 %  Copyright 1999-2011 ImageMagick Studio LLC, a non-profit organization      %
  21 %  dedicated to making software imaging solutions freely available.           %
  22 %                                                                             %
  23 %  You may not use this file except in compliance with the License.  You may  %
  24 %  obtain a copy of the License at                                            %
  25 %                                                                             %
  26 %    http://www.imagemagick.org/script/license.php                            %
  27 %                                                                             %
  28 %  Unless required by applicable law or agreed to in writing, software        %
  29 %  distributed under the License is distributed on an "AS IS" BASIS,          %
  30 %  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.   %
  31 %  See the License for the specific language governing permissions and        %
  32 %  limitations under the License.                                             %
  33 %                                                                             %
  34 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  35 %
  36 %
  37 */
  38 \f
  39 /*
  40   Include declarations.
  41 */
  42 #include "magick/studio.h"
  43 #include "magick/blob.h"
  44 #include "magick/blob-private.h"
  45 #include "magick/draw.h"
  46 #include "magick/exception.h"
  47 #include "magick/exception-private.h"
  48 #include "magick/image.h"
  49 #include "magick/image-private.h"
  50 #include "magick/list.h"
  51 #include "magick/magick.h"
  52 #include "magick/memory_.h"
  53 #include "magick/quantum-private.h"
  54 #include "magick/static.h"
  55 #include "magick/string_.h"
  56 #include "magick/module.h"
  57 #include "magick/type.h"
  58 #include "wand/MagickWand.h"
  59 #if defined(MAGICKCORE_FREETYPE_DELEGATE)
  60 #if defined(MAGICKCORE_HAVE_FT2BUILD_H)
  61 #  include <ft2build.h>
  62 #endif
  63 #if defined(FT_FREETYPE_H)
  64 #  include FT_FREETYPE_H
  65 #else
  66 #  include <freetype/freetype.h>
  67 #endif
  68 #endif
  69 \f
  70 /*
  71 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  72 %                                                                             %
  73 %                                                                             %
  74 %                                                                             %
  75 %   I s P F A                                                                 %
  76 %                                                                             %
  77 %                                                                             %
  78 %                                                                             %
  79 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  80 %
  81 %  IsPFA()() returns MagickTrue if the image format type, identified by the
  82 %  magick string, is PFA.
  83 %
  84 %  The format of the IsPFA method is:
  85 %
  86 %      MagickBooleanType IsPFA(const unsigned char *magick,const size_t length)
  87 %
  88 %  A description of each parameter follows:
  89 %
  90 %    o magick: compare image format pattern against these bytes.
  91 %
  92 %    o length: Specifies the length of the magick string.
  93 %
  94 %
  95 */
  96 static MagickBooleanType IsPFA(const unsigned char *magick,const size_t length)
  97 {
  98   if (length < 14)
  99     return(MagickFalse);
 100   if (LocaleNCompare((char *) magick,"%!PS-AdobeFont",14) == 0)
 101     return(MagickTrue);
 102   return(MagickFalse);
 103 }
 104 \f
 105 /*
 106 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 107 %                                                                             %
 108 %                                                                             %
 109 %                                                                             %
 110 %   I s T T F                                                                 %
 111 %                                                                             %
 112 %                                                                             %
 113 %                                                                             %
 114 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 115 %
 116 %  IsTTF()() returns MagickTrue if the image format type, identified by the
 117 %  magick string, is TTF.
 118 %
 119 %  The format of the IsTTF method is:
 120 %
 121 %      MagickBooleanType IsTTF(const unsigned char *magick,const size_t length)
 122 %
 123 %  A description of each parameter follows:
 124 %
 125 %    o magick: compare image format pattern against these bytes.
 126 %
 127 %    o length: Specifies the length of the magick string.
 128 %
 129 %
 130 */
 131 static MagickBooleanType IsTTF(const unsigned char *magick,const size_t length)
 132 {
 133   if (length < 5)
 134     return(MagickFalse);
 135   if (((int) magick[0] == 0x00) && ((int) magick[1] == 0x01) &&
 136       ((int) magick[2] == 0x00) && ((int) magick[3] == 0x00) &&
 137       ((int) magick[4] == 0x00))
 138     return(MagickTrue);
 139   return(MagickFalse);
 140 }
 141 \f
 142 #if defined(MAGICKCORE_FREETYPE_DELEGATE)
 143 /*
 144 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 145 %                                                                             %
 146 %                                                                             %
 147 %                                                                             %
 148 %   R e a d T T F I m a g e                                                   %
 149 %                                                                             %
 150 %                                                                             %
 151 %                                                                             %
 152 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 153 %
 154 %  ReadTTFImage() reads a TrueType font file and returns it.  It
 155 %  allocates the memory necessary for the new Image structure and returns a
 156 %  pointer to the new image.
 157 %
 158 %  The format of the ReadTTFImage method is:
 159 %
 160 %      Image *ReadTTFImage(const ImageInfo *image_info,ExceptionInfo *exception)
 161 %
 162 %  A description of each parameter follows:
 163 %
 164 %    o image_info: the image info.
 165 %
 166 %    o exception: return any errors or warnings in this structure.
 167 %
 168 */
 169 static Image *ReadTTFImage(const ImageInfo *image_info,ExceptionInfo *exception)
 170 {
 171   char
 172     buffer[MaxTextExtent],
 173     *text;
 174
 175   const char
 176     *Text = (char *)
 177       "abcdefghijklmnopqrstuvwxyz\n"
 178       "ABCDEFGHIJKLMNOPQRSTUVWXYZ\n"
 179       "0123456789.:,;(*!?}^)#${%^&-+@\n";
 180
 181   const TypeInfo
 182     *type_info;
 183
 184   DrawInfo
 185     *draw_info;
 186
 187   Image
 188     *image;
 189
 190   ssize_t
 191     y;
 192
 193   MagickBooleanType
 194     status;
 195
 196   PixelPacket
 197     background_color;
 198
 199   register ssize_t
 200     i,
 201     x;
 202
 203   register PixelPacket
 204     *q;
 205
 206   /*
 207     Open image file.
 208   */
 209   assert(image_info != (const ImageInfo *) NULL);
 210   assert(image_info->signature == MagickSignature);
 211   if (image_info->debug != MagickFalse)
 212     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
 213       image_info->filename);
 214   assert(exception != (ExceptionInfo *) NULL);
 215   assert(exception->signature == MagickSignature);
 216   image=AcquireImage(image_info);
 217   image->columns=800;
 218   image->rows=480;
 219   type_info=GetTypeInfo(image_info->filename,exception);
 220   if ((type_info != (const TypeInfo *) NULL) &&
 221       (type_info->glyphs != (char *) NULL))
 222     (void) CopyMagickString(image->filename,type_info->glyphs,MaxTextExtent);
 223   status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
 224   if (status == MagickFalse)
 225     {
 226       image=DestroyImageList(image);
 227       return((Image *) NULL);
 228     }
 229   /*
 230     Color canvas with background color
 231   */
 232   background_color=image_info->background_color;
 233   for (y=0; y < (ssize_t) image->rows; y++)
 234   {
 235     q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
 236     if (q == (PixelPacket *) NULL)
 237       break;
 238     for (x=0; x < (ssize_t) image->columns; x++)
 239       *q++=background_color;
 240     if (SyncAuthenticPixels(image,exception) == MagickFalse)
 241       break;
 242   }
 243   (void) CopyMagickString(image->magick,image_info->magick,MaxTextExtent);
 244   (void) CopyMagickString(image->filename,image_info->filename,MaxTextExtent);
 245   /*
 246     Prepare drawing commands
 247   */
 248   y=20;
 249   draw_info=CloneDrawInfo(image_info,(DrawInfo *) NULL);
 250   draw_info->font=AcquireString(image->filename);
 251   ConcatenateString(&draw_info->primitive,"push graphic-context\n");
 252   (void) FormatMagickString(buffer,MaxTextExtent," viewbox 0 0 %.20g %.20g\n",
 253     (double) image->columns,(double) image->rows);
 254   ConcatenateString(&draw_info->primitive,buffer);
 255   ConcatenateString(&draw_info->primitive," font-size 18\n");
 256   (void) FormatMagickString(buffer,MaxTextExtent," text 10,%.20g '",(double) y);
 257   ConcatenateString(&draw_info->primitive,buffer);
 258   text=EscapeString(Text,'"');
 259   ConcatenateString(&draw_info->primitive,text);
 260   text=DestroyString(text);
 261   (void) FormatMagickString(buffer,MaxTextExtent,"'\n");
 262   ConcatenateString(&draw_info->primitive,buffer);
 263   y+=20*(ssize_t) MultilineCensus((char *) Text)+20;
 264   for (i=12; i <= 72; i+=6)
 265   {
 266     y+=i+12;
 267     ConcatenateString(&draw_info->primitive," font-size 18\n");
 268     (void) FormatMagickString(buffer,MaxTextExtent," text 10,%.20g '%.20g'\n",
 269       (double) y,(double) i);
 270     ConcatenateString(&draw_info->primitive,buffer);
 271     (void) FormatMagickString(buffer,MaxTextExtent," font-size %.20g\n",
 272       (double) i);
 273     ConcatenateString(&draw_info->primitive,buffer);
 274     (void) FormatMagickString(buffer,MaxTextExtent," text 50,%.20g "
 275       "'That which does not destroy me, only makes me stronger.'\n",(double) y);
 276     ConcatenateString(&draw_info->primitive,buffer);
 277     if (i >= 24)
 278       i+=6;
 279   }
 280   ConcatenateString(&draw_info->primitive,"pop graphic-context");
 281   (void) DrawImage(image,draw_info);
 282   /*
 283     Relinquish resources.
 284   */
 285   draw_info=DestroyDrawInfo(draw_info);
 286   (void) CloseBlob(image);
 287   return(GetFirstImageInList(image));
 288 }
 289 #endif /* MAGICKCORE_FREETYPE_DELEGATE */
 290 \f
 291 /*
 292 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 293 %                                                                             %
 294 %                                                                             %
 295 %                                                                             %
 296 %   R e g i s t e r T T F I m a g e                                           %
 297 %                                                                             %
 298 %                                                                             %
 299 %                                                                             %
 300 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 301 %
 302 %  RegisterTTFImage() adds attributes for the TTF image format to
 303 %  the list of supported formats.  The attributes include the image format
 304 %  tag, a method to read and/or write the format, whether the format
 305 %  supports the saving of more than one frame to the same file or blob,
 306 %  whether the format supports native in-memory I/O, and a brief
 307 %  description of the format.
 308 %
 309 %  The format of the RegisterTTFImage method is:
 310 %
 311 %      size_t RegisterTTFImage(void)
 312 %
 313 */
 314 ModuleExport size_t RegisterTTFImage(void)
 315 {
 316   char
 317     version[MaxTextExtent];
 318
 319   MagickInfo
 320     *entry;
 321
 322   *version='\0';
 323 #if defined(FREETYPE_MAJOR) && defined(FREETYPE_MINOR) && defined(FREETYPE_PATCH)
 324   (void) FormatMagickString(version,MaxTextExtent,"Freetype %d.%d.%d",
 325     FREETYPE_MAJOR,FREETYPE_MINOR,FREETYPE_PATCH);
 326 #endif
 327   entry=SetMagickInfo("DFONT");
 328 #if defined(MAGICKCORE_FREETYPE_DELEGATE)
 329   entry->decoder=(DecodeImageHandler *) ReadTTFImage;
 330 #endif
 331   entry->magick=(IsImageFormatHandler *) IsTTF;
 332   entry->adjoin=MagickFalse;
 333   entry->description=ConstantString("Multi-face font package");
 334   if (*version != '\0')
 335     entry->version=ConstantString(version);
 336   entry->module=ConstantString("TTF");
 337   (void) RegisterMagickInfo(entry);
 338   entry=SetMagickInfo("PFA");
 339 #if defined(MAGICKCORE_FREETYPE_DELEGATE)
 340   entry->decoder=(DecodeImageHandler *) ReadTTFImage;
 341 #endif
 342   entry->magick=(IsImageFormatHandler *) IsPFA;
 343   entry->adjoin=MagickFalse;
 344   entry->description=ConstantString("Postscript Type 1 font (ASCII)");
 345   if (*version != '\0')
 346     entry->version=ConstantString(version);
 347   entry->module=ConstantString("TTF");
 348   (void) RegisterMagickInfo(entry);
 349   entry=SetMagickInfo("PFB");
 350 #if defined(MAGICKCORE_FREETYPE_DELEGATE)
 351   entry->decoder=(DecodeImageHandler *) ReadTTFImage;
 352 #endif
 353   entry->magick=(IsImageFormatHandler *) IsPFA;
 354   entry->adjoin=MagickFalse;
 355   entry->description=ConstantString("Postscript Type 1 font (binary)");
 356   if (*version != '\0')
 357     entry->version=ConstantString(version);
 358   entry->module=ConstantString("TTF");
 359   (void) RegisterMagickInfo(entry);
 360   entry=SetMagickInfo("OTF");
 361 #if defined(MAGICKCORE_FREETYPE_DELEGATE)
 362   entry->decoder=(DecodeImageHandler *) ReadTTFImage;
 363 #endif
 364   entry->magick=(IsImageFormatHandler *) IsTTF;
 365   entry->adjoin=MagickFalse;
 366   entry->description=ConstantString("Open Type font");
 367   if (*version != '\0')
 368     entry->version=ConstantString(version);
 369   entry->module=ConstantString("TTF");
 370   (void) RegisterMagickInfo(entry);
 371   entry=SetMagickInfo("TTC");
 372 #if defined(MAGICKCORE_FREETYPE_DELEGATE)
 373   entry->decoder=(DecodeImageHandler *) ReadTTFImage;
 374 #endif
 375   entry->magick=(IsImageFormatHandler *) IsTTF;
 376   entry->adjoin=MagickFalse;
 377   entry->description=ConstantString("TrueType font collection");
 378   if (*version != '\0')
 379     entry->version=ConstantString(version);
 380   entry->module=ConstantString("TTF");
 381   (void) RegisterMagickInfo(entry);
 382   entry=SetMagickInfo("TTF");
 383 #if defined(MAGICKCORE_FREETYPE_DELEGATE)
 384   entry->decoder=(DecodeImageHandler *) ReadTTFImage;
 385 #endif
 386   entry->magick=(IsImageFormatHandler *) IsTTF;
 387   entry->adjoin=MagickFalse;
 388   entry->description=ConstantString("TrueType font");
 389   if (*version != '\0')
 390     entry->version=ConstantString(version);
 391   entry->module=ConstantString("TTF");
 392   (void) RegisterMagickInfo(entry);
 393   return(MagickImageCoderSignature);
 394 }
 395 \f
 396 /*
 397 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 398 %                                                                             %
 399 %                                                                             %
 400 %                                                                             %
 401 %   U n r e g i s t e r T T F I m a g e                                       %
 402 %                                                                             %
 403 %                                                                             %
 404 %                                                                             %
 405 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 406 %
 407 %  UnregisterTTFImage() removes format registrations made by the
 408 %  TTF module from the list of supported formats.
 409 %
 410 %  The format of the UnregisterTTFImage method is:
 411 %
 412 %      UnregisterTTFImage(void)
 413 %
 414 */
 415 ModuleExport void UnregisterTTFImage(void)
 416 {
 417   (void) UnregisterMagickInfo("TTF");
 418   (void) UnregisterMagickInfo("TTC");
 419   (void) UnregisterMagickInfo("OTF");
 420   (void) UnregisterMagickInfo("PFA");
 421   (void) UnregisterMagickInfo("PFB");
 422   (void) UnregisterMagickInfo("PFA");
 423   (void) UnregisterMagickInfo("DFONT");
 424 }