[wxWidgets.git] / src / freetype / sfnt / ttpost.c

/***************************************************************************/
/*                                                                         */
/*  ttpost.c                                                               */
/*                                                                         */
/*    Postcript name table processing for TrueType and OpenType fonts      */
/*    (body).                                                              */
/*                                                                         */
/*  Copyright 1996-2000 by                                                 */
/*  David Turner, Robert Wilhelm, and Werner Lemberg.                      */
/*                                                                         */
/*  This file is part of the FreeType project, and may only be used,       */
/*  modified, and distributed under the terms of the FreeType project      */
/*  license, LICENSE.TXT.  By continuing to use, modify, or distribute     */
/*  this file you indicate that you have read the license and              */
/*  understand and accept it fully.                                        */
/*                                                                         */
/***************************************************************************/

  /*************************************************************************/
  /*                                                                       */
  /* The post table is not completely loaded by the core engine.  This     */
  /* file loads the missing PS glyph names and implements an API to access */
  /* them.                                                                 */
  /*                                                                       */
  /*************************************************************************/


#include <freetype/internal/ftstream.h>
#include <freetype/internal/tterrors.h>
#include <freetype/tttags.h>


#ifdef FT_FLAT_COMPILE

#include "ttpost.h"
#include "ttload.h"

#else

#include <sfnt/ttpost.h>
#include <sfnt/ttload.h>

#endif


  /*************************************************************************/
  /*                                                                       */
  /* The macro FT_COMPONENT is used in trace mode.  It is an implicit      */
  /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log  */
  /* messages during execution.                                            */
  /*                                                                       */
#undef  FT_COMPONENT
#define FT_COMPONENT  trace_ttpost


  /* If this configuration macro is defined, we rely on the `PSNames' */
  /* module to grab the glyph names.                                  */

#ifdef FT_CONFIG_OPTION_POSTSCRIPT_NAMES


#include <freetype/internal/psnames.h>

#define MAC_NAME( x )  ( (FT_String*)psnames->macintosh_name( x ) )


#else /* FT_CONFIG_OPTION_POSTSCRIPT_NAMES */


   /* Otherwise, we ignore the `PSNames' module, and provide our own  */
   /* table of Mac names.  Thus, it is possible to build a version of */
   /* FreeType without the Type 1 driver & PSNames module.            */

#define  MAC_NAME( x )  TT_Post_Default_Names[x]

  /* the 258 default Mac PS glyph names */

  FT_String*  TT_Post_Default_Names[258] =
  {
    /*   0 */
    ".notdef", ".null", "CR", "space", "exclam",
    "quotedbl", "numbersign", "dollar", "percent", "ampersand",
    /*  10 */
    "quotesingle", "parenleft", "parenright", "asterisk", "plus",
    "comma", "hyphen", "period", "slash", "zero",
    /*  20 */
    "one", "two", "three", "four", "five",
    "six", "seven", "eight", "nine", "colon",
    /*  30 */
    "semicolon", "less", "equal", "greater", "question",
    "at", "A", "B", "C", "D",
    /*  40 */
    "E", "F", "G", "H", "I",
    "J", "K", "L", "M", "N",
    /*  50 */
    "O", "P", "Q", "R", "S",
    "T", "U", "V", "W", "X",
    /*  60 */
    "Y", "Z", "bracketleft", "backslash", "bracketright",
    "asciicircum", "underscore", "grave", "a", "b",
    /*  70 */
    "c", "d", "e", "f", "g",
    "h", "i", "j", "k", "l",
    /*  80 */
    "m", "n", "o", "p", "q",
    "r", "s", "t", "u", "v",
    /*  90 */
    "w", "x", "y", "z", "braceleft",
    "bar", "braceright", "asciitilde", "Adieresis", "Aring",
    /* 100 */
    "Ccedilla", "Eacute", "Ntilde", "Odieresis", "Udieresis",
    "aacute", "agrave", "acircumflex", "adieresis", "atilde",
    /* 110 */
    "aring", "ccedilla", "eacute", "egrave", "ecircumflex",
    "edieresis", "iacute", "igrave", "icircumflex", "idieresis",
    /* 120 */
    "ntilde", "oacute", "ograve", "ocircumflex", "odieresis",
    "otilde", "uacute", "ugrave", "ucircumflex", "udieresis",
    /* 130 */
    "dagger", "degree", "cent", "sterling", "section",
    "bullet", "paragraph", "germandbls", "registered", "copyright",
    /* 140 */
    "trademark", "acute", "dieresis", "notequal", "AE",
    "Oslash", "infinity", "plusminus", "lessequal", "greaterequal",
    /* 150 */
    "yen", "mu", "partialdiff", "summation", "product",
    "pi", "integral", "ordfeminine", "ordmasculine", "Omega",
    /* 160 */
    "ae", "oslash", "questiondown", "exclamdown", "logicalnot",
    "radical", "florin", "approxequal", "Delta", "guillemotleft",
    /* 170 */
    "guillemotright", "ellipsis", "nbspace", "Agrave", "Atilde",
    "Otilde", "OE", "oe", "endash", "emdash",
    /* 180 */
    "quotedblleft", "quotedblright", "quoteleft", "quoteright", "divide",
    "lozenge", "ydieresis", "Ydieresis", "fraction", "currency",
    /* 190 */
    "guilsinglleft", "guilsinglright", "fi", "fl", "daggerdbl",
    "periodcentered", "quotesinglbase", "quotedblbase", "perthousand", "Acircumflex",
    /* 200 */
    "Ecircumflex", "Aacute", "Edieresis", "Egrave", "Iacute",
    "Icircumflex", "Idieresis", "Igrave", "Oacute", "Ocircumflex",
    /* 210 */
    "apple", "Ograve", "Uacute", "Ucircumflex", "Ugrave",
    "dotlessi", "circumflex", "tilde", "macron", "breve",
    /* 220 */
    "dotaccent", "ring", "cedilla", "hungarumlaut", "ogonek",
    "caron", "Lslash", "lslash", "Scaron", "scaron",
    /* 230 */
    "Zcaron", "zcaron", "brokenbar", "Eth", "eth",
    "Yacute", "yacute", "Thorn", "thorn", "minus",
    /* 240 */
    "multiply", "onesuperior", "twosuperior", "threesuperior", "onehalf",
    "onequarter", "threequarters", "franc", "Gbreve", "gbreve",
    /* 250 */
    "Idot", "Scedilla", "scedilla", "Cacute", "cacute",
    "Ccaron", "ccaron", "dmacron",
  };


#endif /* FT_CONFIG_OPTION_POSTSCRIPT_NAMES */


  static
  FT_Error  Load_Format_20( TT_Face    face,
                            FT_Stream  stream )
  {
    FT_Memory  memory = stream->memory;
    FT_Error   error;

    FT_Int     num_glyphs;
    FT_Int     num_names;

    FT_UShort* glyph_indices = 0;
    FT_Char**  name_strings  = 0;


    if ( READ_UShort( num_glyphs ) )
      goto Exit;

    /* UNDOCUMENTED!  The number of glyphs in this table can be smaller */
    /* than the value in the maxp table (cf. cyberbit.ttf).             */

    /* There already exist fonts which have more than 32768 glyph names */
    /* in this table, so the test for this threshold has been dropped.  */

    if ( num_glyphs > face->root.num_glyphs )
    {
      error = TT_Err_Invalid_File_Format;
      goto Exit;
    }

    /* load the indices */
    {
      FT_Int  n;


      if ( ALLOC_ARRAY ( glyph_indices, num_glyphs, FT_UShort ) ||
           ACCESS_Frame( num_glyphs * 2L )                      )
        goto Fail;

      for ( n = 0; n < num_glyphs; n++ )
        glyph_indices[n] = GET_UShort();

      FORGET_Frame();
    }

    /* compute number of names stored in table */
    {
      FT_Int  n;


      num_names = 0;

      for ( n = 0; n < num_glyphs; n++ )
      {
        FT_Int  index;


        index = glyph_indices[n];
        if ( index >= 258 )
        {
          index -= 257;
          if ( index > num_names )
            num_names = index;
        }
      }
    }

    /* now load the name strings */
    {
      FT_Int  n;


      if ( ALLOC_ARRAY( name_strings, num_names, FT_Char* ) )
        goto Fail;

      for ( n = 0; n < num_names; n++ )
      {
        FT_UInt  len;


        if ( READ_Byte  ( len )                               ||
             ALLOC_ARRAY( name_strings[n], len + 1, FT_Char ) ||
             FILE_Read  ( name_strings[n], len )              )
          goto Fail1;

        name_strings[n][len] = '\0';
      }
    }

    /* all right, set table fields and exit successfuly */
    {
      TT_Post_20*  table = &face->postscript_names.names.format_20;


      table->num_glyphs    = num_glyphs;
      table->num_names     = num_names;
      table->glyph_indices = glyph_indices;
      table->glyph_names   = name_strings;
    }
    return TT_Err_Ok;


  Fail1:
    {
      FT_Int  n;


      for ( n = 0; n < num_names; n++ )
        FREE( name_strings[n] );
    }

  Fail:
    FREE( name_strings );
    FREE( glyph_indices );

  Exit:
    return error;
  }


  static
  FT_Error  Load_Format_25( TT_Face    face,
                            FT_Stream  stream )
  {
    FT_Memory  memory = stream->memory;
    FT_Error   error;

    FT_Int     num_glyphs;
    FT_Char*   offset_table = 0;


    /* UNDOCUMENTED!  This value appears only in the Apple TT specs. */
    if ( READ_UShort( num_glyphs ) )
      goto Exit;

    /* check the number of glyphs */
    if ( num_glyphs > face->root.num_glyphs || num_glyphs > 258 )
    {
      error = TT_Err_Invalid_File_Format;
      goto Exit;
    }

    if ( ALLOC    ( offset_table, num_glyphs ) ||
         FILE_Read( offset_table, num_glyphs ) )
      goto Fail;

    /* now check the offset table */
    {
      FT_Int  n;


      for ( n = 0; n < num_glyphs; n++ )
      {
        FT_Long  index = (FT_Long)n + offset_table[n];


        if ( index < 0 || index > num_glyphs )
        {
          error = TT_Err_Invalid_File_Format;
          goto Fail;
        }
      }
    }

    /* OK, set table fields and exit successfuly */
    {
      TT_Post_25*  table = &face->postscript_names.names.format_25;


      table->num_glyphs = num_glyphs;
      table->offsets    = offset_table;
    }

    return TT_Err_Ok;

  Fail:
    FREE( offset_table );

  Exit:
    return error;
  }


  static
  FT_Error  Load_Post_Names( TT_Face  face )
  {
    FT_Stream   stream;
    FT_Error    error;

    /* get a stream for the face's resource */
    stream = face->root.stream;

    /* seek to the beginning of the PS names table */
    error = face->goto_table( face, TTAG_post, stream, 0 );
    if ( error )
      goto Exit;

    /* now read postscript table */
    switch ( face->postscript.FormatType )
    {
    case 0x00020000L:
      error = Load_Format_20( face, stream );
      break;

    case 0x00028000L:
      error = Load_Format_25( face, stream );
      break;

    default:
      error = TT_Err_Invalid_File_Format;
    }

    face->postscript_names.loaded = 1;

  Exit:
    return error;
  }


  LOCAL_FUNC
  void  TT_Free_Post_Names( TT_Face  face )
  {
    FT_Memory       memory = face->root.memory;
    TT_Post_Names*  names  = &face->postscript_names;


    if ( names->loaded )
    {
      switch ( face->postscript.FormatType )
      {
      case 0x00020000L:
        {
          TT_Post_20*  table = &names->names.format_20;
          FT_UInt      n;


          FREE( table->glyph_indices );
          table->num_glyphs = 0;

          for ( n = 0; n < table->num_names; n++ )
            FREE( table->glyph_names[n] );

          FREE( table->glyph_names );
          table->num_names = 0;
        }
        break;

      case 0x00028000L:
        {
          TT_Post_25*  table = &names->names.format_25;


          FREE( table->offsets );
          table->num_glyphs = 0;
        }
        break;
      }
    }
    names->loaded = 0;
  }


  /*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    TT_Get_PS_Name                                                     */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Gets the PostScript glyph name of a glyph.                         */
  /*                                                                       */
  /* <Input>                                                               */
  /*    face   :: A handle to the parent face.                             */
  /*                                                                       */
  /*    index  :: The glyph index.                                         */
  /*                                                                       */
  /*    PSname :: The address of a string pointer.  Will be NULL in case   */
  /*              of error, otherwise it is a pointer to the glyph name.   */
  /*                                                                       */
  /*              You must not modify the returned string!                 */
  /*                                                                       */
  /* <Output>                                                              */
  /*    FreeType error code.  0 means success.                             */
  /*                                                                       */
  LOCAL_FUNC
  FT_Error  TT_Get_PS_Name( TT_Face      face,
                            FT_UInt      index,
                            FT_String**  PSname )
  {
    FT_Error            error;
    TT_Post_Names*      names;

#ifdef FT_CONFIG_OPTION_POSTSCRIPT_NAMES
    PSNames_Interface*  psnames;
#endif


    if ( !face )
      return TT_Err_Invalid_Face_Handle;

    if ( index >= (FT_UInt)face->root.num_glyphs )
      return TT_Err_Invalid_Glyph_Index;

#ifdef FT_CONFIG_OPTION_POSTSCRIPT_NAMES
    psnames = (PSNames_Interface*)face->psnames;
    if ( !psnames )
      return TT_Err_Unimplemented_Feature;
#endif

    names = &face->postscript_names;

    /* `.notdef' by default */
    *PSname = MAC_NAME( 0 );

    switch ( face->postscript.FormatType )
    {
    case 0x00010000L:
      if ( index < 258 )                    /* paranoid checking */
        *PSname = MAC_NAME( index );
      break;

    case 0x00020000L:
      {
        TT_Post_20*  table = &names->names.format_20;


        if ( !names->loaded )
        {
          error = Load_Post_Names( face );
          if ( error )
            break;
        }

        if ( index < table->num_glyphs )
        {
          FT_UShort  name_index = table->glyph_indices[index];


          if ( name_index < 258 )
            *PSname = MAC_NAME( name_index );
          else
            *PSname = (FT_String*)table->glyph_names[name_index - 258];
        }
      }
      break;

    case 0x00028000L:
      {
        TT_Post_25*  table = &names->names.format_25;


        if ( !names->loaded )
        {
          error = Load_Post_Names( face );
          if ( error )
            break;
        }

        if ( index < table->num_glyphs )    /* paranoid checking */
        {
          index  += table->offsets[index];
          *PSname = MAC_NAME( index );
        }
      }
      break;

    case 0x00030000L:
      break;                                /* nothing to do */
    }

    return TT_Err_Ok;
  }


/* END */
Commit	Line	Data
cabec872 RR	1	/***************************************************************************/
	2	/* */
	3	/* ttpost.c */
	4	/* */
	5	/* Postcript name table processing for TrueType and OpenType fonts */
	6	/* (body). */
	7	/* */
	8	/* Copyright 1996-2000 by */
	9	/* David Turner, Robert Wilhelm, and Werner Lemberg. */
	10	/* */
	11	/* This file is part of the FreeType project, and may only be used, */
	12	/* modified, and distributed under the terms of the FreeType project */
	13	/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
	14	/* this file you indicate that you have read the license and */
	15	/* understand and accept it fully. */
	16	/* */
	17	/***************************************************************************/
	18
	19	/*************************************************************************/
	20	/* */
	21	/* The post table is not completely loaded by the core engine. This */
	22	/* file loads the missing PS glyph names and implements an API to access */
	23	/* them. */
	24	/* */
	25	/*************************************************************************/
	26
	27
	28	#include <freetype/internal/ftstream.h>
	29	#include <freetype/internal/tterrors.h>
	30	#include <freetype/tttags.h>
	31
	32
	33	#ifdef FT_FLAT_COMPILE
	34
	35	#include "ttpost.h"
	36	#include "ttload.h"
	37
	38	#else
	39
	40	#include <sfnt/ttpost.h>
	41	#include <sfnt/ttload.h>
	42
	43	#endif
	44
	45
	46	/*************************************************************************/
	47	/* */
	48	/* The macro FT_COMPONENT is used in trace mode. It is an implicit */
	49	/* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */
	50	/* messages during execution. */
	51	/* */
	52	#undef FT_COMPONENT
	53	#define FT_COMPONENT trace_ttpost
	54
	55
	56	/* If this configuration macro is defined, we rely on the `PSNames' */
	57	/* module to grab the glyph names. */
	58
	59	#ifdef FT_CONFIG_OPTION_POSTSCRIPT_NAMES
	60
	61
	62	#include <freetype/internal/psnames.h>
	63
	64	#define MAC_NAME( x ) ( (FT_String*)psnames->macintosh_name( x ) )
65
66
67	#else /* FT_CONFIG_OPTION_POSTSCRIPT_NAMES */
68
69
70	/* Otherwise, we ignore the `PSNames' module, and provide our own */
71	/* table of Mac names. Thus, it is possible to build a version of */
72	/* FreeType without the Type 1 driver & PSNames module. */
73
74	#define MAC_NAME( x ) TT_Post_Default_Names[x]
75
76	/* the 258 default Mac PS glyph names */
77
78	FT_String* TT_Post_Default_Names[258] =
79	{
80	/* 0 */
81	".notdef", ".null", "CR", "space", "exclam",
82	"quotedbl", "numbersign", "dollar", "percent", "ampersand",
83	/* 10 */
84	"quotesingle", "parenleft", "parenright", "asterisk", "plus",
85	"comma", "hyphen", "period", "slash", "zero",
86	/* 20 */
87	"one", "two", "three", "four", "five",
88	"six", "seven", "eight", "nine", "colon",
89	/* 30 */
90	"semicolon", "less", "equal", "greater", "question",
91	"at", "A", "B", "C", "D",
92	/* 40 */
93	"E", "F", "G", "H", "I",
94	"J", "K", "L", "M", "N",
95	/* 50 */
96	"O", "P", "Q", "R", "S",
97	"T", "U", "V", "W", "X",
98	/* 60 */
99	"Y", "Z", "bracketleft", "backslash", "bracketright",
100	"asciicircum", "underscore", "grave", "a", "b",
101	/* 70 */
102	"c", "d", "e", "f", "g",
103	"h", "i", "j", "k", "l",
104	/* 80 */
105	"m", "n", "o", "p", "q",
106	"r", "s", "t", "u", "v",
107	/* 90 */
108	"w", "x", "y", "z", "braceleft",
109	"bar", "braceright", "asciitilde", "Adieresis", "Aring",
110	/* 100 */
111	"Ccedilla", "Eacute", "Ntilde", "Odieresis", "Udieresis",
112	"aacute", "agrave", "acircumflex", "adieresis", "atilde",
113	/* 110 */
114	"aring", "ccedilla", "eacute", "egrave", "ecircumflex",
115	"edieresis", "iacute", "igrave", "icircumflex", "idieresis",
116	/* 120 */
117	"ntilde", "oacute", "ograve", "ocircumflex", "odieresis",
118	"otilde", "uacute", "ugrave", "ucircumflex", "udieresis",
119	/* 130 */
120	"dagger", "degree", "cent", "sterling", "section",
121	"bullet", "paragraph", "germandbls", "registered", "copyright",
122	/* 140 */
123	"trademark", "acute", "dieresis", "notequal", "AE",
124	"Oslash", "infinity", "plusminus", "lessequal", "greaterequal",
125	/* 150 */
126	"yen", "mu", "partialdiff", "summation", "product",
127	"pi", "integral", "ordfeminine", "ordmasculine", "Omega",
128	/* 160 */
129	"ae", "oslash", "questiondown", "exclamdown", "logicalnot",
130	"radical", "florin", "approxequal", "Delta", "guillemotleft",
131	/* 170 */
132	"guillemotright", "ellipsis", "nbspace", "Agrave", "Atilde",
133	"Otilde", "OE", "oe", "endash", "emdash",
134	/* 180 */
135	"quotedblleft", "quotedblright", "quoteleft", "quoteright", "divide",
136	"lozenge", "ydieresis", "Ydieresis", "fraction", "currency",
137	/* 190 */
138	"guilsinglleft", "guilsinglright", "fi", "fl", "daggerdbl",
139	"periodcentered", "quotesinglbase", "quotedblbase", "perthousand", "Acircumflex",
140	/* 200 */
141	"Ecircumflex", "Aacute", "Edieresis", "Egrave", "Iacute",
142	"Icircumflex", "Idieresis", "Igrave", "Oacute", "Ocircumflex",
143	/* 210 */
144	"apple", "Ograve", "Uacute", "Ucircumflex", "Ugrave",
145	"dotlessi", "circumflex", "tilde", "macron", "breve",
146	/* 220 */
147	"dotaccent", "ring", "cedilla", "hungarumlaut", "ogonek",
148	"caron", "Lslash", "lslash", "Scaron", "scaron",
149	/* 230 */
150	"Zcaron", "zcaron", "brokenbar", "Eth", "eth",
151	"Yacute", "yacute", "Thorn", "thorn", "minus",
152	/* 240 */
153	"multiply", "onesuperior", "twosuperior", "threesuperior", "onehalf",
154	"onequarter", "threequarters", "franc", "Gbreve", "gbreve",
155	/* 250 */
156	"Idot", "Scedilla", "scedilla", "Cacute", "cacute",
157	"Ccaron", "ccaron", "dmacron",
158	};
159
160
161	#endif /* FT_CONFIG_OPTION_POSTSCRIPT_NAMES */
162
163
164	static
165	FT_Error Load_Format_20( TT_Face face,
166	FT_Stream stream )
167	{
168	FT_Memory memory = stream->memory;
169	FT_Error error;
170
171	FT_Int num_glyphs;
172	FT_Int num_names;
173
174	FT_UShort* glyph_indices = 0;
175	FT_Char** name_strings = 0;
176
177
178	if ( READ_UShort( num_glyphs ) )
179	goto Exit;
180
181	/* UNDOCUMENTED! The number of glyphs in this table can be smaller */
182	/* than the value in the maxp table (cf. cyberbit.ttf). */
183
184	/* There already exist fonts which have more than 32768 glyph names */
185	/* in this table, so the test for this threshold has been dropped. */
186
187	if ( num_glyphs > face->root.num_glyphs )
188	{
189	error = TT_Err_Invalid_File_Format;
190	goto Exit;
191	}
192
193	/* load the indices */
194	{
195	FT_Int n;
196
197
198	if ( ALLOC_ARRAY ( glyph_indices, num_glyphs, FT_UShort ) \|\|
199	ACCESS_Frame( num_glyphs * 2L ) )
200	goto Fail;
201
202	for ( n = 0; n < num_glyphs; n++ )
203	glyph_indices[n] = GET_UShort();
204
205	FORGET_Frame();
206	}
207
208	/* compute number of names stored in table */
209	{
210	FT_Int n;
211
212
213	num_names = 0;
214
215	for ( n = 0; n < num_glyphs; n++ )
216	{
217	FT_Int index;
218
219
220	index = glyph_indices[n];
221	if ( index >= 258 )
222	{
223	index -= 257;
224	if ( index > num_names )
225	num_names = index;
226	}
227	}
228	}
229
230	/* now load the name strings */
231	{
232	FT_Int n;
233
234
235	if ( ALLOC_ARRAY( name_strings, num_names, FT_Char* ) )
236	goto Fail;
237
238	for ( n = 0; n < num_names; n++ )
239	{
240	FT_UInt len;
241
242
243	if ( READ_Byte ( len ) \|\|
244	ALLOC_ARRAY( name_strings[n], len + 1, FT_Char ) \|\|
245	FILE_Read ( name_strings[n], len ) )
246	goto Fail1;
247
248	name_strings[n][len] = '\0';
249	}
250	}
251
252	/* all right, set table fields and exit successfuly */
253	{
254	TT_Post_20* table = &face->postscript_names.names.format_20;
255
256
257	table->num_glyphs = num_glyphs;
258	table->num_names = num_names;
259	table->glyph_indices = glyph_indices;
260	table->glyph_names = name_strings;
261	}
262	return TT_Err_Ok;
263
264
265	Fail1:
266	{
267	FT_Int n;
268
269
270	for ( n = 0; n < num_names; n++ )
271	FREE( name_strings[n] );
272	}
273
274	Fail:
275	FREE( name_strings );
276	FREE( glyph_indices );
277
278	Exit:
279	return error;
280	}
281
282
283	static
284	FT_Error Load_Format_25( TT_Face face,
285	FT_Stream stream )
286	{
287	FT_Memory memory = stream->memory;
288	FT_Error error;
289
290	FT_Int num_glyphs;
291	FT_Char* offset_table = 0;
292
293
294	/* UNDOCUMENTED! This value appears only in the Apple TT specs. */
295	if ( READ_UShort( num_glyphs ) )
296	goto Exit;
297
298	/* check the number of glyphs */
299	if ( num_glyphs > face->root.num_glyphs \|\| num_glyphs > 258 )
300	{
301	error = TT_Err_Invalid_File_Format;
302	goto Exit;
303	}
304
305	if ( ALLOC ( offset_table, num_glyphs ) \|\|
306	FILE_Read( offset_table, num_glyphs ) )
307	goto Fail;
308
309	/* now check the offset table */
310	{
311	FT_Int n;
312
313
314	for ( n = 0; n < num_glyphs; n++ )
315	{
316	FT_Long index = (FT_Long)n + offset_table[n];
317
318
319	if ( index < 0 \|\| index > num_glyphs )
320	{
321	error = TT_Err_Invalid_File_Format;
322	goto Fail;
323	}
324	}
325	}
326
327	/* OK, set table fields and exit successfuly */
328	{
329	TT_Post_25* table = &face->postscript_names.names.format_25;
330
331
332	table->num_glyphs = num_glyphs;
333	table->offsets = offset_table;
334	}
335
336	return TT_Err_Ok;
337
338	Fail:
339	FREE( offset_table );
340
341	Exit:
342	return error;
343	}
344
345
346	static
347	FT_Error Load_Post_Names( TT_Face face )
348	{
349	FT_Stream stream;
350	FT_Error error;
351
352	/* get a stream for the face's resource */
353	stream = face->root.stream;
354
355	/* seek to the beginning of the PS names table */
356	error = face->goto_table( face, TTAG_post, stream, 0 );
357	if ( error )
358	goto Exit;
359
360	/* now read postscript table */
361	switch ( face->postscript.FormatType )
362	{
363	case 0x00020000L:
364	error = Load_Format_20( face, stream );
365	break;
366
367	case 0x00028000L:
368	error = Load_Format_25( face, stream );
369	break;
370
371	default:
372	error = TT_Err_Invalid_File_Format;
373	}
374
375	face->postscript_names.loaded = 1;
376
377	Exit:
378	return error;
379	}
380
381
382	LOCAL_FUNC
383	void TT_Free_Post_Names( TT_Face face )
384	{
385	FT_Memory memory = face->root.memory;
386	TT_Post_Names* names = &face->postscript_names;
387
388
389	if ( names->loaded )
390	{
391	switch ( face->postscript.FormatType )
392	{
393	case 0x00020000L:
394	{
395	TT_Post_20* table = &names->names.format_20;
396	FT_UInt n;
397
398
399	FREE( table->glyph_indices );
400	table->num_glyphs = 0;
401
402	for ( n = 0; n < table->num_names; n++ )
403	FREE( table->glyph_names[n] );
404
405	FREE( table->glyph_names );
406	table->num_names = 0;
407	}
408	break;
409
410	case 0x00028000L:
411	{
412	TT_Post_25* table = &names->names.format_25;
413
414
415	FREE( table->offsets );
416	table->num_glyphs = 0;
417	}
418	break;
419	}
420	}
421	names->loaded = 0;
422	}
423
424
425	/*************************************************************************/
426	/* */
427	/* <Function> */
428	/* TT_Get_PS_Name */
429	/* */
430	/* <Description> */
431	/* Gets the PostScript glyph name of a glyph. */
432	/* */
433	/* <Input> */
434	/* face :: A handle to the parent face. */
435	/* */
436	/* index :: The glyph index. */
437	/* */
438	/* PSname :: The address of a string pointer. Will be NULL in case */
439	/* of error, otherwise it is a pointer to the glyph name. */
440	/* */
441	/* You must not modify the returned string! */
442	/* */
443	/* <Output> */
444	/* FreeType error code. 0 means success. */
445	/* */
446	LOCAL_FUNC
447	FT_Error TT_Get_PS_Name( TT_Face face,
448	FT_UInt index,
449	FT_String** PSname )
450	{
451	FT_Error error;
452	TT_Post_Names* names;
453
454	#ifdef FT_CONFIG_OPTION_POSTSCRIPT_NAMES
455	PSNames_Interface* psnames;
456	#endif
457
458
459	if ( !face )
460	return TT_Err_Invalid_Face_Handle;
461
462	if ( index >= (FT_UInt)face->root.num_glyphs )
463	return TT_Err_Invalid_Glyph_Index;
464
465	#ifdef FT_CONFIG_OPTION_POSTSCRIPT_NAMES
466	psnames = (PSNames_Interface*)face->psnames;
467	if ( !psnames )
468	return TT_Err_Unimplemented_Feature;
469	#endif
470
471	names = &face->postscript_names;
472
473	/* `.notdef' by default */
474	*PSname = MAC_NAME( 0 );
475
476	switch ( face->postscript.FormatType )
477	{
478	case 0x00010000L:
479	if ( index < 258 ) /* paranoid checking */
480	*PSname = MAC_NAME( index );
481	break;
482
483	case 0x00020000L:
484	{
485	TT_Post_20* table = &names->names.format_20;
486
487
488	if ( !names->loaded )
489	{
490	error = Load_Post_Names( face );
491	if ( error )
492	break;
493	}
494
495	if ( index < table->num_glyphs )
496	{
497	FT_UShort name_index = table->glyph_indices[index];
498
499
500	if ( name_index < 258 )
501	*PSname = MAC_NAME( name_index );
502	else
503	PSname = (FT_String)table->glyph_names[name_index - 258];
504	}
505	}
506	break;
507
508	case 0x00028000L:
509	{
510	TT_Post_25* table = &names->names.format_25;
511
512
513	if ( !names->loaded )
514	{
515	error = Load_Post_Names( face );
516	if ( error )
517	break;
518	}
519
520	if ( index < table->num_glyphs ) /* paranoid checking */
521	{
522	index += table->offsets[index];
523	*PSname = MAC_NAME( index );
524	}
525	}
526	break;
527
528	case 0x00030000L:
529	break; /* nothing to do */
530	}
531
532	return TT_Err_Ok;
533	}
534
535
536	/* END */