libraries/freetype-2.0.5/t1objs.c

   1 /***************************************************************************/
   2 /*                                                                         */
   3 /*  t1objs.c                                                               */
   4 /*                                                                         */
   5 /*    Type 1 objects manager (body).                                       */
   6 /*                                                                         */
   7 /*  Copyright 1996-2001 by                                                 */
   8 /*  David Turner, Robert Wilhelm, and Werner Lemberg.                      */
   9 /*                                                                         */
  10 /*  This file is part of the FreeType project, and may only be used,       */
  11 /*  modified, and distributed under the terms of the FreeType project      */
  12 /*  license, LICENSE.TXT.  By continuing to use, modify, or distribute     */
  13 /*  this file you indicate that you have read the license and              */
  14 /*  understand and accept it fully.                                        */
  15 /*                                                                         */
  16 /***************************************************************************/
  17
  18
  19 #include <ft2build.h>
  20 #include FT_INTERNAL_DEBUG_H
  21 #include FT_INTERNAL_STREAM_H
  22
  23 #include <string.h>         /* strcmp() */
  24
  25 #include "t1gload.h"
  26 #include "t1load.h"
  27
  28 #include "t1errors.h"
  29
  30 #ifndef T1_CONFIG_OPTION_NO_AFM
  31 #include "t1afm.h"
  32 #endif
  33
  34 #include FT_INTERNAL_POSTSCRIPT_NAMES_H
  35 #include FT_INTERNAL_POSTSCRIPT_AUX_H
  36
  37
  38   /*************************************************************************/
  39   /*                                                                       */
  40   /* The macro FT_COMPONENT is used in trace mode.  It is an implicit      */
  41   /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log  */
  42   /* messages during execution.                                            */
  43   /*                                                                       */
  44 #undef  FT_COMPONENT
  45 #define FT_COMPONENT  trace_t1objs
  46
  47
  48   /*************************************************************************/
  49   /*                                                                       */
  50   /*                            FACE  FUNCTIONS                            */
  51   /*                                                                       */
  52   /*************************************************************************/
  53
  54
  55   /*************************************************************************/
  56   /*                                                                       */
  57   /* <Function>                                                            */
  58   /*    T1_Done_Face                                                       */
  59   /*                                                                       */
  60   /* <Description>                                                         */
  61   /*    The face object destructor.                                        */
  62   /*                                                                       */
  63   /* <Input>                                                               */
  64   /*    face :: A typeless pointer to the face object to destroy.          */
  65   /*                                                                       */
  66   FT_LOCAL_DEF void
  67   T1_Done_Face( T1_Face  face )
  68   {
  69     FT_Memory  memory;
  70     T1_Font*   type1 = &face->type1;
  71
  72
  73     if ( face )
  74     {
  75       memory = face->root.memory;
  76
  77 #ifndef T1_CONFIG_OPTION_NO_MM_SUPPORT
  78       /* release multiple masters information */
  79       T1_Done_Blend( face );
  80       face->blend = 0;
  81 #endif
  82
  83       /* release font info strings */
  84       {
  85         T1_FontInfo*  info = &type1->font_info;
  86
  87
  88         FREE( info->version );
  89         FREE( info->notice );
  90         FREE( info->full_name );
  91         FREE( info->family_name );
  92         FREE( info->weight );
  93       }
  94
  95       /* release top dictionary */
  96       FREE( type1->charstrings_len );
  97       FREE( type1->charstrings );
  98       FREE( type1->glyph_names );
  99
 100       FREE( type1->subrs );
 101       FREE( type1->subrs_len );
 102
 103       FREE( type1->subrs_block );
 104       FREE( type1->charstrings_block );
 105       FREE( type1->glyph_names_block );
 106
 107       FREE( type1->encoding.char_index );
 108       FREE( type1->encoding.char_name );
 109       FREE( type1->font_name );
 110
 111 #ifndef T1_CONFIG_OPTION_NO_AFM
 112       /* release afm data if present */
 113       if ( face->afm_data )
 114         T1_Done_AFM( memory, (T1_AFM*)face->afm_data );
 115 #endif
 116
 117       /* release unicode map, if any */
 118       FREE( face->unicode_map.maps );
 119       face->unicode_map.num_maps = 0;
 120
 121       face->root.family_name = 0;
 122       face->root.style_name  = 0;
 123     }
 124   }
 125
 126
 127   /*************************************************************************/
 128   /*                                                                       */
 129   /* <Function>                                                            */
 130   /*    T1_Init_Face                                                       */
 131   /*                                                                       */
 132   /* <Description>                                                         */
 133   /*    The face object constructor.                                       */
 134   /*                                                                       */
 135   /* <Input>                                                               */
 136   /*    stream     ::  input stream where to load font data.               */
 137   /*                                                                       */
 138   /*    face_index :: The index of the font face in the resource.          */
 139   /*                                                                       */
 140   /*    num_params :: Number of additional generic parameters.  Ignored.   */
 141   /*                                                                       */
 142   /*    params     :: Additional generic parameters.  Ignored.             */
 143   /*                                                                       */
 144   /* <InOut>                                                               */
 145   /*    face       :: The face record to build.                            */
 146   /*                                                                       */
 147   /* <Return>                                                              */
 148   /*    FreeType error code.  0 means success.                             */
 149   /*                                                                       */
 150   FT_LOCAL_DEF FT_Error
 151   T1_Init_Face( FT_Stream      stream,
 152                 T1_Face        face,
 153                 FT_Int         face_index,
 154                 FT_Int         num_params,
 155                 FT_Parameter*  params )
 156   {
 157     FT_Error            error;
 158     PSNames_Interface*  psnames;
 159     PSAux_Interface*    psaux;
 160
 161     FT_UNUSED( num_params );
 162     FT_UNUSED( params );
 163     FT_UNUSED( face_index );
 164     FT_UNUSED( stream );
 165
 166
 167     face->root.num_faces = 1;
 168
 169     psnames = (PSNames_Interface*)face->psnames;
 170     if ( !psnames )
 171     {
 172       psnames = (PSNames_Interface*)
 173                 FT_Get_Module_Interface( FT_FACE_LIBRARY( face ), "psnames" );
 174
 175       face->psnames = psnames;
 176     }
 177
 178     psaux = (PSAux_Interface*)face->psaux;
 179     if ( !psaux )
 180     {
 181       psaux = (PSAux_Interface*)
 182               FT_Get_Module_Interface( FT_FACE_LIBRARY( face ), "psaux" );
 183
 184       face->psaux = psaux;
 185     }
 186
 187     /* open the tokenizer, this will also check the font format */
 188     error = T1_Open_Face( face );
 189     if ( error )
 190       goto Exit;
 191
 192     /* if we just wanted to check the format, leave successfully now */
 193     if ( face_index < 0 )
 194       goto Exit;
 195
 196     /* check the face index */
 197     if ( face_index != 0 )
 198     {
 199       FT_ERROR(( "T1_Init_Face: invalid face index\n" ));
 200       error = T1_Err_Invalid_Argument;
 201       goto Exit;
 202     }
 203
 204     /* Now, load the font program into the face object */
 205
 206     /* Init the face object fields */
 207     /* Now set up root face fields */
 208     {
 209       FT_Face  root = (FT_Face)&face->root;
 210
 211
 212       root->num_glyphs   = face->type1.num_glyphs;
 213       root->num_charmaps = 1;
 214
 215       root->face_index = face_index;
 216       root->face_flags = FT_FACE_FLAG_SCALABLE;
 217
 218       root->face_flags |= FT_FACE_FLAG_HORIZONTAL;
 219
 220       root->face_flags |= FT_FACE_FLAG_GLYPH_NAMES;
 221
 222       if ( face->type1.font_info.is_fixed_pitch )
 223         root->face_flags |= FT_FACE_FLAG_FIXED_WIDTH;
 224
 225       if ( face->blend )
 226         root->face_flags |= FT_FACE_FLAG_MULTIPLE_MASTERS;
 227
 228       /* XXX: TODO -- add kerning with .afm support */
 229
 230       /* get style name -- be careful, some broken fonts only */
 231       /* have a `/FontName' dictionary entry!                 */
 232       root->family_name = face->type1.font_info.family_name;
 233       if ( root->family_name )
 234       {
 235         char*  full   = face->type1.font_info.full_name;
 236         char*  family = root->family_name;
 237
 238
 239         while ( *family && *full == *family )
 240         {
 241           family++;
 242           full++;
 243         }
 244
 245         root->style_name = ( *full == ' ' ? full + 1
 246                                           : (char *)"Regular" );
 247       }
 248       else
 249       {
 250         /* do we have a `/FontName'? */
 251         if ( face->type1.font_name )
 252         {
 253           root->family_name = face->type1.font_name;
 254           root->style_name  = (char *)"Regular";
 255         }
 256       }
 257
 258       /* compute style flags */
 259       root->style_flags = 0;
 260       if ( face->type1.font_info.italic_angle )
 261         root->style_flags |= FT_STYLE_FLAG_ITALIC;
 262       if ( face->type1.font_info.weight )
 263       {
 264         if ( !strcmp( face->type1.font_info.weight, "Bold"  ) ||
 265              !strcmp( face->type1.font_info.weight, "Black" ) )
 266           root->style_flags |= FT_STYLE_FLAG_BOLD;
 267       }
 268
 269       /* no embedded bitmap support */
 270       root->num_fixed_sizes = 0;
 271       root->available_sizes = 0;
 272
 273       root->bbox = face->type1.font_bbox;
 274
 275       /* Set units_per_EM if we didn't set it in parse_font_matrix. */
 276       if ( !root->units_per_EM )
 277         root->units_per_EM = 1000;
 278
 279       root->ascender  = (FT_Short)( face->type1.font_bbox.yMax >> 16 );
 280       root->descender = (FT_Short)( face->type1.font_bbox.yMin >> 16 );
 281       root->height    = (FT_Short)(
 282                           ( ( root->ascender - root->descender ) * 12 ) / 10 );
 283
 284       /* now compute the maximum advance width */
 285       root->max_advance_width =
 286         (FT_Short)( face->type1.font_bbox.xMax >> 16 );
 287       {
 288         FT_Int  max_advance;
 289
 290
 291         error = T1_Compute_Max_Advance( face, &max_advance );
 292
 293         /* in case of error, keep the standard width */
 294         if ( !error )
 295           root->max_advance_width = (FT_Short)max_advance;
 296         else
 297           error = 0;   /* clear error */
 298       }
 299
 300       root->max_advance_height = root->height;
 301
 302       root->underline_position  = face->type1.font_info.underline_position;
 303       root->underline_thickness = face->type1.font_info.underline_thickness;
 304
 305       root->internal->max_points   = 0;
 306       root->internal->max_contours = 0;
 307     }
 308
 309     /* charmap support -- synthetize unicode charmap if possible */
 310     {
 311       FT_Face     root    = &face->root;
 312       FT_CharMap  charmap = face->charmaprecs;
 313
 314
 315       /* synthesize a Unicode charmap if there is support in the `PSNames' */
 316       /* module                                                            */
 317       if ( psnames )
 318       {
 319         if ( psnames->unicode_value )
 320         {
 321           error = psnames->build_unicodes(
 322                     root->memory,
 323                     face->type1.num_glyphs,
 324                     (const char**)face->type1.glyph_names,
 325                     &face->unicode_map );
 326           if ( !error )
 327           {
 328             root->charmap        = charmap;
 329             charmap->face        = (FT_Face)face;
 330             charmap->encoding    = ft_encoding_unicode;
 331             charmap->platform_id = 3;
 332             charmap->encoding_id = 1;
 333             charmap++;
 334           }
 335
 336           /* simply clear the error in case of failure (which really) */
 337           /* means that out of memory or no unicode glyph names       */
 338           error = T1_Err_Ok;
 339         }
 340       }
 341
 342       /* now, support either the standard, expert, or custom encoding */
 343       charmap->face        = (FT_Face)face;
 344       charmap->platform_id = 7;  /* a new platform id for Adobe fonts? */
 345
 346       switch ( face->type1.encoding_type )
 347       {
 348       case t1_encoding_standard:
 349         charmap->encoding    = ft_encoding_adobe_standard;
 350         charmap->encoding_id = 0;
 351         break;
 352
 353       case t1_encoding_expert:
 354         charmap->encoding    = ft_encoding_adobe_expert;
 355         charmap->encoding_id = 1;
 356         break;
 357
 358       default:
 359         charmap->encoding    = ft_encoding_adobe_custom;
 360         charmap->encoding_id = 2;
 361         break;
 362       }
 363
 364       root->charmaps     = face->charmaps;
 365       root->num_charmaps = charmap - face->charmaprecs + 1;
 366       face->charmaps[0]  = &face->charmaprecs[0];
 367       face->charmaps[1]  = &face->charmaprecs[1];
 368     }
 369
 370   Exit:
 371     return error;
 372   }
 373
 374
 375   /*************************************************************************/
 376   /*                                                                       */
 377   /* <Function>                                                            */
 378   /*    T1_Init_Driver                                                     */
 379   /*                                                                       */
 380   /* <Description>                                                         */
 381   /*    Initializes a given Type 1 driver object.                          */
 382   /*                                                                       */
 383   /* <Input>                                                               */
 384   /*    driver :: A handle to the target driver object.                    */
 385   /*                                                                       */
 386   /* <Return>                                                              */
 387   /*    FreeType error code.  0 means success.                             */
 388   /*                                                                       */
 389   FT_LOCAL_DEF FT_Error
 390   T1_Init_Driver( T1_Driver  driver )
 391   {
 392     FT_UNUSED( driver );
 393
 394     return T1_Err_Ok;
 395   }
 396
 397
 398   /*************************************************************************/
 399   /*                                                                       */
 400   /* <Function>                                                            */
 401   /*    T1_Done_Driver                                                     */
 402   /*                                                                       */
 403   /* <Description>                                                         */
 404   /*    Finalizes a given Type 1 driver.                                   */
 405   /*                                                                       */
 406   /* <Input>                                                               */
 407   /*    driver  :: A handle to the target Type 1 driver.                   */
 408   /*                                                                       */
 409   FT_LOCAL_DEF void
 410   T1_Done_Driver( T1_Driver  driver )
 411   {
 412     FT_UNUSED( driver );
 413   }
 414
 415
 416 /* END */