src/freetype/type1/t1objs.c

   1 /***************************************************************************/
   2 /*                                                                         */
   3 /*  t1objs.c                                                               */
   4 /*                                                                         */
   5 /*    Type 1 objects manager (body).                                       */
   6 /*                                                                         */
   7 /*  Copyright 1996-2000 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 <freetype/internal/ftdebug.h>
  20 #include <freetype/internal/ftstream.h>
  21
  22
  23 #ifdef FT_FLAT_COMPILE
  24
  25 #include "t1gload.h"
  26 #include "t1load.h"
  27 #include "t1afm.h"
  28
  29 #ifndef T1_CONFIG_OPTION_DISABLE_HINTER
  30 #include "t1hinter.h"
  31 #endif
  32
  33 #else /* FT_FLAT_COMPILE */
  34
  35 #include <type1/t1gload.h>
  36 #include <type1/t1load.h>
  37 #include <type1/t1afm.h>
  38
  39 #ifndef T1_CONFIG_OPTION_DISABLE_HINTER
  40 #include <type1/t1hinter.h>
  41 #endif
  42
  43 #endif /* FT_FLAT_COMPILE */
  44
  45
  46 #include <freetype/internal/psnames.h>
  47
  48
  49   /*************************************************************************/
  50   /*                                                                       */
  51   /* The macro FT_COMPONENT is used in trace mode.  It is an implicit      */
  52   /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log  */
  53   /* messages during execution.                                            */
  54   /*                                                                       */
  55 #undef  FT_COMPONENT
  56 #define FT_COMPONENT  trace_t1objs
  57
  58
  59   /*************************************************************************/
  60   /*                                                                       */
  61   /*                           SIZE  FUNCTIONS                             */
  62   /*                                                                       */
  63   /*************************************************************************/
  64
  65
  66   /*************************************************************************/
  67   /*                                                                       */
  68   /* <Function>                                                            */
  69   /*    T1_Done_Size                                                       */
  70   /*                                                                       */
  71   /* <Description>                                                         */
  72   /*    The Type 1 size object destructor.  Used to discard a given size   */
  73   /*    object.                                                            */
  74   /*                                                                       */
  75   /* <Input>                                                               */
  76   /*    size :: A handle to the target size object.                        */
  77   /*                                                                       */
  78   LOCAL_FUNC
  79   void  T1_Done_Size( T1_Size  size )
  80   {
  81     if ( size )
  82     {
  83
  84 #ifndef T1_CONFIG_OPTION_DISABLE_HINTER
  85       T1_Done_Size_Hinter( size );
  86 #endif
  87
  88       size->valid = 0;
  89     }
  90   }
  91
  92
  93   /*************************************************************************/
  94   /*                                                                       */
  95   /* <Function>                                                            */
  96   /*    T1_Init_Size                                                       */
  97   /*                                                                       */
  98   /* <Description>                                                         */
  99   /*    The size object initializer.                                       */
 100   /*                                                                       */
 101   /* <Input>                                                               */
 102   /*    size :: A handle to the target size object.                        */
 103   /*                                                                       */
 104   /* <Return>                                                              */
 105   /*    FreeTrue error code.  0 means success.                             */
 106   /*                                                                       */
 107   LOCAL_DEF
 108   FT_Error  T1_Init_Size( T1_Size  size )
 109   {
 110     FT_Error  error;
 111
 112
 113     size->valid = 0;
 114
 115 #ifndef T1_CONFIG_OPTION_DISABLE_HINTER
 116     error = T1_New_Size_Hinter( size );
 117
 118     return error;
 119 #else
 120
 121     FT_UNUSED( error );
 122
 123     return T1_Err_Ok;
 124
 125 #endif
 126   }
 127
 128
 129   /*************************************************************************/
 130   /*                                                                       */
 131   /* <Function>                                                            */
 132   /*    T1_Reset_Size                                                      */
 133   /*                                                                       */
 134   /* <Description>                                                         */
 135   /*    Resets an instance to a new pointsize/transform.  This function is */
 136   /*    in charge of resetting the blue zones,a s well as the stem snap    */
 137   /*    tables for a given size.                                           */
 138   /*                                                                       */
 139   /* <Input>                                                               */
 140   /*    size :: The target size object.                                    */
 141   /*                                                                       */
 142   /* <Output>                                                              */
 143   /*    FreeType error code.  0 means success.                             */
 144   /*                                                                       */
 145   LOCAL_FUNC
 146   FT_Error  T1_Reset_Size( T1_Size  size )
 147   {
 148     /* recompute ascender, descender, etc. */
 149     T1_Face           face    = (T1_Face)size->root.face;
 150     FT_Size_Metrics*  metrics = &size->root.metrics;
 151
 152
 153     if ( metrics->x_ppem < 1 || metrics->y_ppem < 1 )
 154       return FT_Err_Invalid_Argument;
 155
 156     /* Compute root ascender, descender, test height, and max_advance */
 157     metrics->ascender    = ( FT_MulFix( face->root.ascender,
 158                                         metrics->y_scale ) + 32 ) & -64;
 159     metrics->descender   = ( FT_MulFix( face->root.descender,
 160                                         metrics->y_scale ) + 32 ) & -64;
 161     metrics->height      = ( FT_MulFix( face->root.height,
 162                                         metrics->y_scale ) + 32 ) & -64;
 163     metrics->max_advance = ( FT_MulFix( face->root.max_advance_width,
 164                                         metrics->x_scale ) + 32 ) & -64;
 165
 166 #ifndef T1_CONFIG_OPTION_DISABLE_HINTER
 167     return T1_Reset_Size_Hinter( size );
 168 #else
 169     return 0;
 170 #endif
 171   }
 172
 173
 174   /*************************************************************************/
 175   /*                                                                       */
 176   /*                            FACE  FUNCTIONS                            */
 177   /*                                                                       */
 178   /*************************************************************************/
 179
 180
 181   /*************************************************************************/
 182   /*                                                                       */
 183   /* <Function>                                                            */
 184   /*    T1_Done_Face                                                       */
 185   /*                                                                       */
 186   /* <Description>                                                         */
 187   /*    The face object destructor.                                        */
 188   /*                                                                       */
 189   /* <Input>                                                               */
 190   /*    face :: A typeless pointer to the face object to destroy.          */
 191   /*                                                                       */
 192   LOCAL_FUNC
 193   void  T1_Done_Face( T1_Face  face )
 194   {
 195     FT_Memory  memory;
 196     T1_Font*   type1 = &face->type1;
 197
 198
 199     if ( face )
 200     {
 201       memory = face->root.memory;
 202
 203       /* release font info strings */
 204       {
 205         T1_FontInfo*  info = &type1->font_info;
 206
 207
 208         FREE( info->version );
 209         FREE( info->notice );
 210         FREE( info->full_name );
 211         FREE( info->family_name );
 212         FREE( info->weight );
 213       }
 214
 215       /* release top dictionary */
 216       FREE( type1->charstrings_len );
 217       FREE( type1->charstrings );
 218       FREE( type1->glyph_names );
 219
 220       FREE( type1->subrs );
 221       FREE( type1->subrs_len );
 222
 223       FREE( type1->subrs_block );
 224       FREE( type1->charstrings_block );
 225       FREE( type1->glyph_names_block );
 226
 227       FREE( type1->encoding.char_index );
 228       FREE( type1->font_name );
 229
 230 #ifndef T1_CONFIG_OPTION_NO_AFM
 231       /* release afm data if present */
 232       if ( face->afm_data )
 233         T1_Done_AFM( memory, (T1_AFM*)face->afm_data );
 234 #endif
 235
 236       /* release unicode map, if any */
 237       FREE( face->unicode_map.maps );
 238       face->unicode_map.num_maps = 0;
 239
 240       face->root.family_name = 0;
 241       face->root.style_name  = 0;
 242     }
 243   }
 244
 245
 246   /*************************************************************************/
 247   /*                                                                       */
 248   /* <Function>                                                            */
 249   /*    T1_Init_Face                                                       */
 250   /*                                                                       */
 251   /* <Description>                                                         */
 252   /*    The face object constructor.                                       */
 253   /*                                                                       */
 254   /* <Input>                                                               */
 255   /*    stream     ::  input stream where to load font data.               */
 256   /*                                                                       */
 257   /*    face_index :: The index of the font face in the resource.          */
 258   /*                                                                       */
 259   /*    num_params :: Number of additional generic parameters.  Ignored.   */
 260   /*                                                                       */
 261   /*    params     :: Additional generic parameters.  Ignored.             */
 262   /*                                                                       */
 263   /* <InOut>                                                               */
 264   /*    face       :: The face record to build.                            */
 265   /*                                                                       */
 266   /* <Return>                                                              */
 267   /*    FreeType error code.  0 means success.                             */
 268   /*                                                                       */
 269   LOCAL_FUNC
 270   FT_Error  T1_Init_Face( FT_Stream      stream,
 271                           T1_Face        face,
 272                           FT_Int         face_index,
 273                           FT_Int         num_params,
 274                           FT_Parameter*  params )
 275   {
 276     T1_Tokenizer        tokenizer;
 277     FT_Error            error;
 278     PSNames_Interface*  psnames;
 279
 280     FT_UNUSED( num_params );
 281     FT_UNUSED( params );
 282     FT_UNUSED( face_index );
 283     FT_UNUSED( face );
 284
 285
 286     face->root.num_faces = 1;
 287
 288     psnames = (PSNames_Interface*)face->psnames;
 289     if ( !psnames )
 290     {
 291       psnames = (PSNames_Interface*)
 292                  FT_Get_Module_Interface( FT_FACE_LIBRARY( face ),
 293                                           "psnames" );
 294
 295       face->psnames = psnames;
 296     }
 297
 298     /* open the tokenizer, this will also check the font format */
 299     error = New_Tokenizer( stream, &tokenizer );
 300     if ( error )
 301       goto Fail;
 302
 303     /* if we just wanted to check the format, leave successfully now */
 304     if ( face_index < 0 )
 305       goto Leave;
 306
 307     /* check the face index */
 308     if ( face_index != 0 )
 309     {
 310       FT_ERROR(( "T1_Init_Face: invalid face index\n" ));
 311       error = T1_Err_Invalid_Argument;
 312       goto Leave;
 313     }
 314
 315     /* Now, load the font program into the face object */
 316     {
 317       T1_Parser  parser;
 318
 319
 320       Init_T1_Parser( &parser, face, tokenizer );
 321       error = Parse_T1_FontProgram( &parser );
 322       if ( error )
 323         goto Leave;
 324
 325       /* Init the face object fields */
 326       /* Now set up root face fields */
 327       {
 328         FT_Face   root  = (FT_Face)&face->root;
 329         T1_Font*  type1 = &face->type1;
 330
 331
 332         root->num_glyphs   = type1->num_glyphs;
 333         root->num_charmaps = 1;
 334
 335         root->face_index = face_index;
 336         root->face_flags = FT_FACE_FLAG_SCALABLE;
 337
 338         root->face_flags |= FT_FACE_FLAG_HORIZONTAL;
 339
 340         root->face_flags |= FT_FACE_FLAG_GLYPH_NAMES;
 341
 342         if ( type1->font_info.is_fixed_pitch )
 343           root->face_flags |= FT_FACE_FLAG_FIXED_WIDTH;
 344
 345         /* XXX: TODO -- add kerning with .afm support */
 346
 347         /* get style name - be careful, some broken fonts only */
 348         /* have a `/FontName' dictionary entry!                */
 349         root->family_name = type1->font_info.family_name;
 350         if ( root->family_name )
 351         {
 352           char*  full   = type1->font_info.full_name;
 353           char*  family = root->family_name;
 354
 355
 356           while ( *family && *full == *family )
 357           {
 358             family++;
 359             full++;
 360           }
 361
 362           root->style_name = ( *full == ' ' ? full + 1
 363                                             : (char *)"Regular" );
 364         }
 365         else
 366         {
 367           /* do we have a `/FontName'? */
 368           if (type1->font_name)
 369           {
 370             root->family_name = type1->font_name;
 371             root->style_name  = "Regular";
 372           }
 373         }
 374
 375         /* no embedded bitmap support */
 376         root->num_fixed_sizes = 0;
 377         root->available_sizes = 0;
 378
 379         root->bbox         = type1->font_bbox;
 380         root->units_per_EM = 1000;
 381         root->ascender     =  (FT_Short)type1->font_bbox.yMax;
 382         root->descender    = -(FT_Short)type1->font_bbox.yMin;
 383         root->height       = ( ( root->ascender + root->descender) * 12 )
 384                              / 10;
 385
 386         /* now compute the maximum advance width */
 387
 388         root->max_advance_width = type1->private_dict.standard_width[0];
 389
 390         /* compute max advance width for proportional fonts */
 391         if ( !type1->font_info.is_fixed_pitch )
 392         {
 393           FT_Int  max_advance;
 394
 395
 396           error = T1_Compute_Max_Advance( face, &max_advance );
 397
 398           /* in case of error, keep the standard width */
 399           if ( !error )
 400             root->max_advance_width = max_advance;
 401           else
 402             error = 0;   /* clear error */
 403         }
 404
 405         root->max_advance_height = root->height;
 406
 407         root->underline_position  = type1->font_info.underline_position;
 408         root->underline_thickness = type1->font_info.underline_thickness;
 409
 410         root->max_points   = 0;
 411         root->max_contours = 0;
 412       }
 413     }
 414
 415     /* charmap support - synthetize unicode charmap when possible */
 416     {
 417       FT_Face     root    = &face->root;
 418       FT_CharMap  charmap = face->charmaprecs;
 419
 420
 421       /* synthesize a Unicode charmap if there is support in the `PSNames' */
 422       /* module..                                                          */
 423       if ( face->psnames )
 424       {
 425         PSNames_Interface*  psnames = (PSNames_Interface*)face->psnames;
 426
 427
 428         if ( psnames->unicode_value )
 429         {
 430           error = psnames->build_unicodes(
 431                     root->memory,
 432                     face->type1.num_glyphs,
 433                     (const char**)face->type1.glyph_names,
 434                     &face->unicode_map );
 435           if ( !error )
 436           {
 437             root->charmap        = charmap;
 438             charmap->face        = (FT_Face)face;
 439             charmap->encoding    = ft_encoding_unicode;
 440             charmap->platform_id = 3;
 441             charmap->encoding_id = 1;
 442             charmap++;
 443           }
 444
 445           /* simply clear the error in case of failure (which really) */
 446           /* means that out of memory or no unicode glyph names       */
 447           error = 0;
 448         }
 449       }
 450
 451       /* now, support either the standard, expert, or custom encodings */
 452       charmap->face        = (FT_Face)face;
 453       charmap->platform_id = 7;  /* a new platform id for Adobe fonts ?? */
 454
 455       switch ( face->type1.encoding_type )
 456       {
 457       case t1_encoding_standard:
 458         charmap->encoding    = ft_encoding_adobe_standard;
 459         charmap->encoding_id = 0;
 460         break;
 461
 462       case t1_encoding_expert:
 463         charmap->encoding    = ft_encoding_adobe_expert;
 464         charmap->encoding_id = 1;
 465         break;
 466
 467       default:
 468         charmap->encoding    = ft_encoding_adobe_custom;
 469         charmap->encoding_id = 2;
 470         break;
 471       }
 472
 473       root->charmaps     = face->charmaps;
 474       root->num_charmaps = charmap - face->charmaprecs + 1;
 475       face->charmaps[0]  = &face->charmaprecs[0];
 476       face->charmaps[1]  = &face->charmaprecs[1];
 477     }
 478
 479   Leave:
 480     Done_Tokenizer( tokenizer );
 481
 482   Fail:
 483     return error;
 484   }
 485
 486
 487   /*************************************************************************/
 488   /*                                                                       */
 489   /* <Function>                                                            */
 490   /*    T1_Done_GlyphSlot                                                  */
 491   /*                                                                       */
 492   /* <Description>                                                         */
 493   /*    The glyph slot object destructor.                                  */
 494   /*                                                                       */
 495   /* <Input>                                                               */
 496   /*    glyph :: The glyph slot handle to destroy.                         */
 497   /*                                                                       */
 498   LOCAL_FUNC
 499   void  T1_Done_GlyphSlot( T1_GlyphSlot  glyph )
 500   {
 501 #ifndef T1_CONFIG_OPTION_DISABLE_HINTER
 502
 503     T1_Done_Glyph_Hinter( glyph );
 504
 505 #else
 506
 507     FT_UNUSED( glyph );
 508
 509 #endif
 510   }
 511
 512
 513   /*************************************************************************/
 514   /*                                                                       */
 515   /* <Function>                                                            */
 516   /*    T1_Init_GlyphSlot                                                  */
 517   /*                                                                       */
 518   /* <Description>                                                         */
 519   /*    The glyph slot object constructor.                                 */
 520   /*                                                                       */
 521   /* <Input>                                                               */
 522   /*    glyph :: The glyph slot handle to initialize.                      */
 523   /*                                                                       */
 524   LOCAL_FUNC
 525   FT_Error  T1_Init_GlyphSlot( T1_GlyphSlot  glyph )
 526   {
 527     FT_Error    error = FT_Err_Ok;
 528
 529
 530 #ifndef T1_CONFIG_OPTION_DISABLE_HINTER
 531
 532     error = T1_New_Glyph_Hinter( glyph );
 533
 534 #else
 535
 536     FT_UNUSED( glyph );
 537
 538 #endif
 539
 540     return error;
 541   }
 542
 543
 544 /* END */