ref: 4ea18e55734bc64cc62d89939bdcc40d7826f522
dir: /src/sfnt/ttpost.c/
/***************************************************************************/
/* */
/* ttpost.c */
/* */
/* Postscript names table processing (body). */
/* */
/* Copyright 1996-1999 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 <ttpost.h>
#include <ftstream.h>
#include <tterrors.h>
#include <ttload.h>
#include <tttags.h>
/* When this configuration macro is defined, we rely on the "psnames" */
/* module to grab the glyph names.. */
#ifdef FT_CONFIG_OPTION_POSTSCRIPT_NAMES
#include <psnames.h>
#define MAC_NAME(x) ((TT_String*)psnames->macintosh_name(x))
#else
/* Otherwise, we ignore the "psnames" module, then 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 */
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
static
TT_Error Load_Format_20( TT_Face face,
FT_Stream stream )
{
FT_Memory memory = stream->memory;
TT_Error error;
TT_Int num_glyphs;
TT_Int num_names;
TT_UShort* glyph_indices = 0;
TT_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 */
{
TT_Int n;
if ( ALLOC_ARRAY ( glyph_indices, num_glyphs, TT_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 */
{
TT_Int n;
num_names = 0;
for ( n = 0; n < num_glyphs; n++ )
{
TT_Int index;
index = glyph_indices[n];
if ( index >= 258 )
{
index -= 257;
if ( index > num_names )
num_names = index;
}
}
}
/* now load the name strings */
{
TT_Int n;
if ( ALLOC_ARRAY( name_strings, num_names, TT_Char* ) )
goto Fail;
for ( n = 0; n < num_names; n++ )
{
TT_UInt len;
if ( READ_Byte ( len ) ||
ALLOC_ARRAY( name_strings[n], len+1, TT_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:
{
TT_Int n;
for ( n = 0; n < num_names; n++ )
FREE( name_strings[n] );
}
Fail:
FREE( name_strings );
FREE( glyph_indices );
Exit:
return error;
}
static
TT_Error Load_Format_25( TT_Face face,
FT_Stream stream )
{
FT_Memory memory = stream->memory;
TT_Error error;
TT_Int num_glyphs;
TT_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 */
{
TT_Int n;
for ( n = 0; n < num_glyphs; n++ )
{
TT_Long index = (TT_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
TT_Error Load_Post_Names( TT_Face face )
{
FT_Stream stream;
TT_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 0x00020000:
error = Load_Format_20( face, stream );
break;
case 0x00028000:
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 0x00020000:
{
TT_Post_20* table = &names->names.format_20;
TT_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 0x00028000:
{
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> */
/* 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> */
/* TrueType error code. 0 means success. */
/* */
EXPORT_FUNC
TT_Error TT_Get_PS_Name( TT_Face face,
TT_UInt index,
TT_String** PSname )
{
TT_Error error;
TT_Post_Names* names;
PSNames_Interface* psnames;
if ( !face )
return TT_Err_Invalid_Face_Handle;
if ( index >= (TT_UInt)face->root.num_glyphs )
return TT_Err_Invalid_Glyph_Index;
psnames = (PSNames_Interface*)face->psnames;
if (!psnames)
return TT_Err_Unimplemented_Feature;
names = &face->postscript_names;
/* `.notdef' by default */
*PSname = MAC_NAME(0);
switch ( face->postscript.FormatType )
{
case 0x00010000:
if ( index < 258 ) /* paranoid checking */
*PSname = MAC_NAME(index);
break;
case 0x00020000:
{
TT_Post_20* table = &names->names.format_20;
if ( !names->loaded )
{
error = Load_Post_Names( face );
if ( error )
break;
}
if ( index < table->num_glyphs )
{
TT_UShort name_index = table->glyph_indices[index];
if ( name_index < 258 )
*PSname = MAC_NAME(name_index);
else
*PSname = (TT_String*)table->glyph_names[name_index - 258];
}
}
break;
case 0x00028000:
{
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 0x00030000:
break; /* nothing to do */
}
return TT_Err_Ok;
}
/* END */