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fuchsia / third_party / freetype2 / 347a714c5438218c0294290d5b26993df6829e02 / . / src / type42 / t42drivr.c
blob: 81e0e8a9bcd3cab77e75de55037d445dae5ff315 [file] [log] [blame]
/***************************************************************************/
/* */
/* t42drivr.c */
/* */
/* FreeType font driver for Type 42 fonts (body only). */
/* */
/* Copyright 2002 by Roberto Alameda. */
/* */
/* 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. */
/* */
/***************************************************************************/
#include <ft2build.h>
#define FT_ERR_PREFIX T42_Err_
#define FT_ERR_BASE FT_Mod_Err_Type42
#include FT_CONFIG_STANDARD_LIBRARY_H
#include FT_INTERNAL_DEBUG_H
#include FT_CONFIG_CONFIG_H
#include FT_ERRORS_H
#include FT_FREETYPE_H
#include FT_TYPE1_TABLES_H
#include FT_LIST_H
#include FT_INTERNAL_DRIVER_H
#include FT_INTERNAL_OBJECTS_H
#include FT_INTERNAL_TYPE1_TYPES_H
#include FT_INTERNAL_POSTSCRIPT_AUX_H
#include FT_INTERNAL_STREAM_H
/********************* Data Definitions ******************/
typedef enum T42_EncodingType_
{
T42_ENCODING_TYPE_NONE = 0,
T42_ENCODING_TYPE_ARRAY,
T42_ENCODING_TYPE_STANDARD,
T42_ENCODING_TYPE_EXPERT,
T42_ENCODING_TYPE_ISOLATIN1
} T42_EncodingType;
typedef struct T42_Font_
{
/* font info dictionary */
PS_FontInfoRec font_info;
/* top-level dictionary */
FT_String* font_name;
T42_EncodingType encoding_type;
T1_EncodingRec encoding;
FT_Byte* charstrings_block;
FT_Byte* glyph_names_block;
FT_Int num_glyphs;
FT_String** glyph_names; /* array of glyph names */
FT_Byte** charstrings; /* array of glyph charstrings */
FT_Int* charstrings_len;
FT_Byte paint_type;
FT_Byte font_type;
FT_Matrix font_matrix; /* From FontMatrix field: a, b, c, d */
FT_Vector font_offset; /* From FontMatrix field: tx, ty */
FT_BBox font_bbox;
FT_Int stroke_width;
} T42_FontRec, *T42_Font;
typedef struct T42_FaceRec_
{
FT_FaceRec root;
T42_FontRec type42;
void* psnames;
void* psaux;
void* afm_data;
FT_Byte* ttf_data;
FT_ULong ttf_size;
FT_Face ttf_face;
FT_CharMapRec charmaprecs[2];
FT_CharMap charmaps[2];
PS_Unicodes unicode_map;
} T42_FaceRec, *T42_Face;
typedef struct T42_DriverRec_
{
FT_DriverRec root;
FT_Driver_Class ttclazz;
void* extension_component;
} T42_DriverRec, *T42_Driver;
typedef struct T42_SizeRec_
{
FT_SizeRec root;
FT_Size ttsize;
} T42_SizeRec, *T42_Size;
typedef struct T42_GlyphSlotRec_
{
FT_GlyphSlotRec root;
FT_GlyphSlot ttslot;
} T42_GlyphSlotRec, *T42_GlyphSlot;
/*********** Parser definitions *************/
typedef struct T42_ParserRec_
{
PS_ParserRec root;
FT_Stream stream;
FT_Byte* base_dict;
FT_Int base_len;
FT_Byte in_memory;
} T42_ParserRec, *T42_Parser;
typedef struct T42_Loader_
{
T42_ParserRec parser; /* parser used to read the stream */
FT_Int num_chars; /* number of characters in encoding */
PS_TableRec encoding_table; /* PS_Table used to store the */
/* encoding character names */
FT_Int num_glyphs;
PS_TableRec glyph_names;
PS_TableRec charstrings;
} T42_LoaderRec, *T42_Loader;
/*********************** Prototypes *********************/
static void
parse_font_name( T42_Face face,
T42_Loader loader );
static void
parse_font_bbox( T42_Face face,
T42_Loader loader );
static void
parse_font_matrix( T42_Face face,
T42_Loader loader );
static void
parse_encoding( T42_Face face,
T42_Loader loader );
static void
parse_charstrings( T42_Face face,
T42_Loader loader );
static void
parse_sfnts( T42_Face face,
T42_Loader loader );
static const
T1_FieldRec t42_keywords[] = {
#undef FT_STRUCTURE
#define FT_STRUCTURE T1_FontInfo
#undef T1CODE
#define T1CODE T1_FIELD_LOCATION_FONT_INFO
T1_FIELD_STRING ( "version", version )
T1_FIELD_STRING ( "Notice", notice )
T1_FIELD_STRING ( "FullName", full_name )
T1_FIELD_STRING ( "FamilyName", family_name )
T1_FIELD_STRING ( "Weight", weight )
T1_FIELD_NUM ( "ItalicAngle", italic_angle )
T1_FIELD_TYPE_BOOL( "isFixedPitch", is_fixed_pitch )
T1_FIELD_NUM ( "UnderlinePosition", underline_position )
T1_FIELD_NUM ( "UnderlineThickness", underline_thickness )
#undef FT_STRUCTURE
#define FT_STRUCTURE T42_FontRec
#undef T1CODE
#define T1CODE T1_FIELD_LOCATION_FONT_DICT
T1_FIELD_NUM( "PaintType", paint_type )
T1_FIELD_NUM( "FontType", font_type )
T1_FIELD_NUM( "StrokeWidth", stroke_width )
T1_FIELD_CALLBACK( "FontName", parse_font_name )
T1_FIELD_CALLBACK( "FontBBox", parse_font_bbox )
T1_FIELD_CALLBACK( "FontMatrix", parse_font_matrix )
T1_FIELD_CALLBACK( "Encoding", parse_encoding )
T1_FIELD_CALLBACK( "CharStrings", parse_charstrings )
T1_FIELD_CALLBACK( "sfnts", parse_sfnts )
{ 0, T1_FIELD_LOCATION_CID_INFO, T1_FIELD_TYPE_NONE, 0, 0, 0, 0, 0 }
};
#define T1_Add_Table( p, i, o, l ) (p)->funcs.add( (p), i, o, l )
#define T1_Done_Table( p ) \
do \
{ \
if ( (p)->funcs.done ) \
(p)->funcs.done( p ); \
} while ( 0 )
#define T1_Release_Table( p ) \
do \
{ \
if ( (p)->funcs.release ) \
(p)->funcs.release( p ); \
} while ( 0 )
#define T1_Skip_Spaces( p ) (p)->root.funcs.skip_spaces( &(p)->root )
#define T1_Skip_Alpha( p ) (p)->root.funcs.skip_alpha ( &(p)->root )
#define T1_ToInt( p ) (p)->root.funcs.to_int( &(p)->root )
#define T1_ToFixed( p, t ) (p)->root.funcs.to_fixed( &(p)->root, t )
#define T1_ToCoordArray( p, m, c ) \
(p)->root.funcs.to_coord_array( &(p)->root, m, c )
#define T1_ToFixedArray( p, m, f, t ) \
(p)->root.funcs.to_fixed_array( &(p)->root, m, f, t )
#define T1_ToToken( p, t ) \
(p)->root.funcs.to_token( &(p)->root, t )
#define T1_ToTokenArray( p, t, m, c ) \
(p)->root.funcs.to_token_array( &(p)->root, t, m, c )
#define T1_Load_Field( p, f, o, m, pf ) \
(p)->root.funcs.load_field( &(p)->root, f, o, m, pf )
#define T1_Load_Field_Table( p, f, o, m, pf ) \
(p)->root.funcs.load_field_table( &(p)->root, f, o, m, pf )
/********************* Parsing Functions ******************/
static FT_Error
T42_New_Parser( T42_Parser parser,
FT_Stream stream,
FT_Memory memory,
PSAux_Service psaux )
{
FT_Error error = T42_Err_Ok;
FT_Long size;
psaux->ps_parser_funcs->init( &parser->root, 0, 0, memory );
parser->stream = stream;
parser->base_len = 0;
parser->base_dict = 0;
parser->in_memory = 0;
/*******************************************************************/
/* */
/* Here a short summary of what is going on: */
/* */
/* When creating a new Type 42 parser, we try to locate and load */
/* the base dictionary, loading the whole font into memory. */
/* */
/* When `loading' the base dictionary, we only setup pointers in */
/* the case of a memory-based stream. Otherwise, we allocate */
/* and load the base dictionary in it. */
/* */
/* parser->in_memory is set if we have a memory stream. */
/* */
if ( FT_STREAM_SEEK( 0L ) )
goto Exit;
size = stream->size;
/* now, try to load `size' bytes of the `base' dictionary we */
/* found previously */
/* if it is a memory-based resource, set up pointers */
if ( !stream->read )
{
parser->base_dict = (FT_Byte*)stream->base + stream->pos;
parser->base_len = size;
parser->in_memory = 1;
/* check that the `size' field is valid */
if ( FT_STREAM_SKIP( size ) )
goto Exit;
}
else
{
/* read segment in memory */
if (FT_ALLOC( parser->base_dict, size ) ||
FT_STREAM_READ( parser->base_dict, size ) )
goto Exit;
parser->base_len = size;
}
/* Now check font format; we must see `%!PS-TrueTypeFont' */
if (size <= 17 ||
( ft_strncmp( (const char*)parser->base_dict,
"%!PS-TrueTypeFont", 17) ) )
error = T42_Err_Unknown_File_Format;
else
{
parser->root.base = parser->base_dict;
parser->root.cursor = parser->base_dict;
parser->root.limit = parser->root.cursor + parser->base_len;
}
Exit:
if ( error && !parser->in_memory )
FT_FREE( parser->base_dict );
return error;
}
static void
T42_Finalize_Parser( T42_Parser parser )
{
FT_Memory memory = parser->root.memory;
/* free the base dictionary only when we have a disk stream */
if ( !parser->in_memory )
FT_FREE( parser->base_dict );
parser->root.funcs.done( &parser->root );
}
static int
is_alpha( FT_Byte c )
{
/* Note: we must accept "+" as a valid character, as it is used in */
/* embedded type1 fonts in PDF documents. */
/* */
return ( ft_isalnum( c ) ||
c == '.' ||
c == '_' ||
c == '-' ||
c == '+' );
}
static int
is_space( FT_Byte c )
{
return ( c == ' ' || c == '\t' || c == '\r' || c == '\n' );
}
static void
parse_font_name( T42_Face face,
T42_Loader loader )
{
T42_Parser parser = &loader->parser;
FT_Error error;
FT_Memory memory = parser->root.memory;
FT_Int len;
FT_Byte* cur;
FT_Byte* cur2;
FT_Byte* limit;
T1_Skip_Spaces( parser );
cur = parser->root.cursor;
limit = parser->root.limit;
if ( cur >= limit - 1 ||
( *cur != '/' && *cur != '(') )
return;
cur++;
cur2 = cur;
while ( cur2 < limit && is_alpha( *cur2 ) )
cur2++;
len = (FT_Int)( cur2 - cur );
if ( len > 0 )
{
if ( FT_ALLOC( face->type42.font_name, len + 1 ) )
{
parser->root.error = error;
return;
}
FT_MEM_COPY( face->type42.font_name, cur, len );
face->type42.font_name[len] = '\0';
}
parser->root.cursor = cur2;
}
static void
parse_font_bbox( T42_Face face,
T42_Loader loader )
{
T42_Parser parser = &loader->parser;
FT_BBox* bbox = &face->type42.font_bbox;
bbox->xMin = T1_ToInt( parser );
bbox->yMin = T1_ToInt( parser );
bbox->xMax = T1_ToInt( parser );
bbox->yMax = T1_ToInt( parser );
}
static void
parse_font_matrix( T42_Face face,
T42_Loader loader )
{
T42_Parser parser = &loader->parser;
FT_Matrix* matrix = &face->type42.font_matrix;
FT_Vector* offset = &face->type42.font_offset;
FT_Face root = (FT_Face)&face->root;
FT_Fixed temp[6];
FT_Fixed temp_scale;
/* XXX: Are these three lines necessary */
if ( matrix->xx || matrix->yx )
/* with synthetic fonts, it's possible we get here twice */
return;
(void)T1_ToFixedArray( parser, 6, temp, 3 );
temp_scale = ABS( temp[3] );
/* Set Units per EM based on FontMatrix values. We set the value to */
/* 1000 / temp_scale, because temp_scale was already multiplied by */
/* 1000 (in t1_tofixed, from psobjs.c). */
root->units_per_EM = (FT_UShort)( FT_DivFix( 1000 * 0x10000L,
temp_scale ) >> 16 );
/* we need to scale the values by 1.0/temp_scale */
if ( temp_scale != 0x10000L ) {
temp[0] = FT_DivFix( temp[0], temp_scale );
temp[1] = FT_DivFix( temp[1], temp_scale );
temp[2] = FT_DivFix( temp[2], temp_scale );
temp[4] = FT_DivFix( temp[4], temp_scale );
temp[5] = FT_DivFix( temp[5], temp_scale );
temp[3] = 0x10000L;
}
matrix->xx = temp[0];
matrix->yx = temp[1];
matrix->xy = temp[2];
matrix->yy = temp[3];
/* note that the offsets must be expressed in integer font units */
offset->x = temp[4] >> 16;
offset->y = temp[5] >> 16;
}
static void
parse_encoding( T42_Face face,
T42_Loader loader )
{
T42_Parser parser = &loader->parser;
FT_Byte* cur = parser->root.cursor;
FT_Byte* limit = parser->root.limit;
PSAux_Service psaux = (PSAux_Service)face->psaux;
/* skip whitespace */
while ( is_space( *cur ) )
{
cur++;
if ( cur >= limit )
{
FT_ERROR(( "parse_encoding: out of bounds!\n" ));
parser->root.error = T42_Err_Invalid_File_Format;
return;
}
}
/* if we have a number, then the encoding is an array, */
/* and we must load it now */
if ( (FT_Byte)( *cur - '0' ) < 10 )
{
T1_Encoding encode = &face->type42.encoding;
FT_Int count, n;
PS_Table char_table = &loader->encoding_table;
FT_Memory memory = parser->root.memory;
FT_Error error;
/* read the number of entries in the encoding, should be 256 */
count = T1_ToInt( parser );
if ( parser->root.error )
return;
/* we use a T1_Table to store our charnames */
loader->num_chars = encode->num_chars = count;
if ( FT_NEW_ARRAY( encode->char_index, count ) ||
FT_NEW_ARRAY( encode->char_name, count ) ||
FT_SET_ERROR( psaux->ps_table_funcs->init(
char_table, count, memory ) ) )
{
parser->root.error = error;
return;
}
/* We need to `zero' out encoding_table.elements */
for ( n = 0; n < count; n++ )
{
char* notdef = (char *)".notdef";
T1_Add_Table( char_table, n, notdef, 8 );
}
/* Now, we will need to read a record of the form */
/* ... charcode /charname ... for each entry in our table */
/* */
/* We simply look for a number followed by an immediate */
/* name. Note that this ignores correctly the sequence */
/* that is often seen in type1 fonts: */
/* */
/* 0 1 255 { 1 index exch /.notdef put } for dup */
/* */
/* used to clean the encoding array before anything else. */
/* */
/* We stop when we encounter a `def'. */
cur = parser->root.cursor;
limit = parser->root.limit;
n = 0;
for ( ; cur < limit; )
{
FT_Byte c;
c = *cur;
/* we stop when we encounter a `def' */
if ( c == 'd' && cur + 3 < limit )
{
if ( cur[1] == 'e' &&
cur[2] == 'f' &&
is_space( cur[-1] ) &&
is_space( cur[3] ) )
{
FT_TRACE6(( "encoding end\n" ));
break;
}
}
/* otherwise, we must find a number before anything else */
if ( (FT_Byte)( c - '0' ) < 10 )
{
FT_Int charcode;
parser->root.cursor = cur;
charcode = T1_ToInt( parser );
cur = parser->root.cursor;
/* skip whitespace */
while ( cur < limit && is_space( *cur ) )
cur++;
if ( cur < limit && *cur == '/' )
{
/* bingo, we have an immediate name -- it must be a */
/* character name */
FT_Byte* cur2 = cur + 1;
FT_Int len;
while ( cur2 < limit && is_alpha( *cur2 ) )
cur2++;
len = (FT_Int)( cur2 - cur - 1 );
parser->root.error = T1_Add_Table( char_table, charcode,
cur + 1, len + 1 );
char_table->elements[charcode][len] = '\0';
if ( parser->root.error )
return;
cur = cur2;
}
}
else
cur++;
}
face->type42.encoding_type = T42_ENCODING_TYPE_ARRAY;
parser->root.cursor = cur;
}
/* Otherwise, we should have either `StandardEncoding', */
/* `ExpertEncoding', or `ISOLatin1Encoding' */
else
{
if ( cur + 17 < limit &&
ft_strncmp( (const char*)cur, "StandardEncoding", 16 ) == 0 )
face->type42.encoding_type = T42_ENCODING_TYPE_STANDARD;
else if ( cur + 15 < limit &&
ft_strncmp( (const char*)cur, "ExpertEncoding", 14 ) == 0 )
face->type42.encoding_type = T42_ENCODING_TYPE_EXPERT;
else if ( cur + 18 < limit &&
ft_strncmp( (const char*)cur, "ISOLatin1Encoding", 17 ) == 0 )
face->type42.encoding_type = T42_ENCODING_TYPE_ISOLATIN1;
else {
FT_ERROR(( "parse_encoding: invalid token!\n" ));
parser->root.error = T42_Err_Invalid_File_Format;
}
}
}
static FT_Byte
hexval( FT_Byte v )
{
if ( v >= 'A' && v <= 'F' )
return v - 'A' + 10;
if ( v >= 'a' && v <= 'f' )
return v - 'a' + 10;
if ( v >= '0' && v <= '9' )
return v - '0';
return 0;
}
static void
parse_sfnts( T42_Face face,
T42_Loader loader )
{
T42_Parser parser = &loader->parser;
FT_Memory memory = parser->root.memory;
FT_Byte* cur = parser->root.cursor;
FT_Byte* limit = parser->root.limit;
FT_Error error;
FT_Int num_tables, status;
FT_ULong count, ttf_size, string_size;
FT_Bool in_string = 0;
FT_Byte v;
/* The format is `/sfnts [ <...> <...> ... ] def' */
while ( is_space( *cur ) )
cur++;
if (*cur++ == '[')
{
status = 0;
count = 0;
}
else
{
FT_ERROR(( "parse_sfnts: can't find begin of sfnts vector!\n" ));
error = T42_Err_Invalid_File_Format;
goto Fail;
}
while ( cur < limit - 2 )
{
while ( is_space( *cur ) )
cur++;
switch ( *cur )
{
case ']':
parser->root.cursor = cur++;
return;
case '<':
in_string = 1;
string_size = 0;
cur++;
continue;
case '>':
if ( !in_string )
{
FT_ERROR(( "parse_sfnts: found unpaired `>'!\n" ));
error = T42_Err_Invalid_File_Format;
goto Fail;
}
/* A string can have, as a last byte, */
/* a zero byte for padding. If so, ignore it */
if ( ( v == 0 ) && ( string_size % 2 == 1 ) )
count--;
in_string = 0;
cur++;
continue;
case '%':
if ( !in_string )
{
/* Comment found; skip till end of line */
while ( *cur != '\n' )
cur++;
continue;
}
else
{
FT_ERROR(( "parse_sfnts: found `%' in string!\n" ));
error = T42_Err_Invalid_File_Format;
goto Fail;
}
default:
if ( !ft_xdigit( *cur ) || !ft_xdigit( *(cur + 1) ) )
{
FT_ERROR(( "parse_sfnts: found non-hex characters in string" ));
error = T42_Err_Invalid_File_Format;
goto Fail;
}
v = 16 * hexval( *cur++ ) + hexval( *cur++ );
string_size++;
}
switch ( status )
{
case 0: /* The '[' was read, so load offset table, 12 bytes */
if ( count < 12 )
{
face->ttf_data[count++] = v;
continue;
}
else
{
num_tables = 16 * face->ttf_data[4] + face->ttf_data[5];
status = 1;
ttf_size = 12 + 16 * num_tables;
if ( FT_REALLOC( face->ttf_data, 12, ttf_size ) )
goto Fail;
}
/* No break, fall-through */
case 1: /* The offset table is read; read now the table directory */
if ( count < ttf_size )
{
face->ttf_data[count++] = v;
continue;
}
else
{
int i;
FT_ULong len;
for ( i = 0; i < num_tables; i++ )
{
len = face->ttf_data[12 + 16*i + 12 + 0] << 24;
len += face->ttf_data[12 + 16*i + 12 + 1] << 16;
len += face->ttf_data[12 + 16*i + 12 + 2] << 8;
len += face->ttf_data[12 + 16*i + 12 + 3];
/* Pad to a 4-byte boundary length */
ttf_size += ( len + 3 ) & ~3;
}
status = 2;
face->ttf_size = ttf_size;
if ( FT_REALLOC( face->ttf_data, 12 + 16 * num_tables,
ttf_size + 1 ) )
goto Fail;
}
/* No break, fall-through */
case 2: /* We are reading normal tables; just swallow them */
face->ttf_data[count++] = v;
}
}
/* If control reaches this point, the format was not valid */
error = T42_Err_Invalid_File_Format;
Fail:
parser->root.error = error;
}
static void
parse_charstrings( T42_Face face,
T42_Loader loader )
{
T42_Parser parser = &loader->parser;
PS_Table code_table = &loader->charstrings;
PS_Table name_table = &loader->glyph_names;
FT_Memory memory = parser->root.memory;
FT_Error error;
PSAux_Service psaux = (PSAux_Service)face->psaux;
FT_Byte* cur;
FT_Byte* limit = parser->root.limit;
FT_Int n;
loader->num_glyphs = T1_ToInt( parser );
if ( parser->root.error )
return;
/* initialize tables */
error = psaux->ps_table_funcs->init( code_table,
loader->num_glyphs,
memory );
if ( error )
goto Fail;
error = psaux->ps_table_funcs->init( name_table,
loader->num_glyphs,
memory );
if ( error )
goto Fail;
n = 0;
for (;;)
{
/* the format is simple: */
/* `/glyphname' + index + def */
/* */
/* note that we stop when we find an `end' */
/* */
T1_Skip_Spaces( parser );
cur = parser->root.cursor;
if ( cur >= limit )
break;
/* we stop when we find an `end' keyword */
if ( *cur == 'e' &&
cur + 3 < limit &&
cur[1] == 'n' &&
cur[2] == 'd' )
break;
if ( *cur != '/' )
T1_Skip_Alpha( parser );
else
{
FT_Byte* cur2 = cur + 1;
FT_Int len;
while ( cur2 < limit && is_alpha( *cur2 ) )
cur2++;
len = (FT_Int)( cur2 - cur - 1 );
error = T1_Add_Table( name_table, n, cur + 1, len + 1 );
if ( error )
goto Fail;
/* add a trailing zero to the name table */
name_table->elements[n][len] = '\0';
parser->root.cursor = cur2;
T1_Skip_Spaces( parser );
cur2 = cur = parser->root.cursor;
if ( cur >= limit )
break;
while ( cur2 < limit && is_alpha( *cur2 ) )
cur2++;
len = (FT_Int)( cur2 - cur );
error = T1_Add_Table( code_table, n, cur, len + 1 );
if ( error )
goto Fail;
code_table->elements[n][len] = '\0';
n++;
if ( n >= loader->num_glyphs )
break;
}
}
/* Index 0 must be a .notdef element */
if ( ft_strcmp( (char *)name_table->elements[0], ".notdef" ) )
{
FT_ERROR(( "parse_charstrings: Index 0 is not `.notdef'!\n" ));
error = T42_Err_Invalid_File_Format;
goto Fail;
}
loader->num_glyphs = n;
return;
Fail:
parser->root.error = error;
}
static FT_Error
t42_load_keyword( T42_Face face,
T42_Loader loader,
T1_Field field )
{
FT_Error error;
void* dummy_object;
void** objects;
FT_UInt max_objects = 0;
/* if the keyword has a dedicated callback, call it */
if ( field->type == T1_FIELD_TYPE_CALLBACK ) {
field->reader( (FT_Face)face, loader );
error = loader->parser.root.error;
goto Exit;
}
/* now, the keyword is either a simple field, or a table of fields; */
/* we are now going to take care of it */
switch ( field->location )
{
case T1_FIELD_LOCATION_FONT_INFO:
dummy_object = &face->type42.font_info;
objects = &dummy_object;
break;
default:
dummy_object = &face->type42;
objects = &dummy_object;
}
if ( field->type == T1_FIELD_TYPE_INTEGER_ARRAY ||
field->type == T1_FIELD_TYPE_FIXED_ARRAY )
error = T1_Load_Field_Table( &loader->parser, field,
objects, max_objects, 0 );
else
error = T1_Load_Field( &loader->parser, field,
objects, max_objects, 0 );
Exit:
return error;
}
static FT_Error
parse_dict( T42_Face face,
T42_Loader loader,
FT_Byte* base,
FT_Long size )
{
T42_Parser parser = &loader->parser;
FT_Byte* cur = base;
FT_Byte* limit = cur + size;
FT_UInt n_keywords = sizeof ( t42_keywords ) /
sizeof ( t42_keywords[0] );
parser->root.cursor = base;
parser->root.limit = base + size;
parser->root.error = 0;
for ( ; cur < limit; cur++ )
{
/* look for `FontDirectory', which causes problems on some fonts */
if ( *cur == 'F' && cur + 25 < limit &&
ft_strncmp( (char*)cur, "FontDirectory", 13 ) == 0 )
{
FT_Byte* cur2;
/* skip the `FontDirectory' keyword */
cur += 13;
cur2 = cur;
/* lookup the `known' keyword */
while ( cur < limit && *cur != 'k' &&
ft_strncmp( (char*)cur, "known", 5 ) )
cur++;
if ( cur < limit )
{
T1_TokenRec token;
/* skip the `known' keyword and the token following it */
cur += 5;
loader->parser.root.cursor = cur;
T1_ToToken( &loader->parser, &token );
/* if the last token was an array, skip it! */
if ( token.type == T1_TOKEN_TYPE_ARRAY )
cur2 = parser->root.cursor;
}
cur = cur2;
}
/* look for immediates */
else if ( *cur == '/' && cur + 2 < limit )
{
FT_Byte* cur2;
FT_UInt i, len;
cur++;
cur2 = cur;
while ( cur2 < limit && is_alpha( *cur2 ) )
cur2++;
len = (FT_UInt)( cur2 - cur );
if ( len > 0 && len < 22 ) /* XXX What shall it this 22? */
{
/* now, compare the immediate name to the keyword table */
/* Loop through all known keywords */
for ( i = 0; i < n_keywords; i++ )
{
T1_Field keyword = (T1_Field)&t42_keywords[i];
FT_Byte *name = (FT_Byte*)keyword->ident;
if ( !name )
continue;
if ( ( len == ft_strlen( (const char *)name ) ) &&
( ft_memcmp( cur, name, len ) == 0 ) )
{
/* we found it -- run the parsing callback! */
parser->root.cursor = cur2;
T1_Skip_Spaces( parser );
parser->root.error = t42_load_keyword(face,
loader,
keyword );
if ( parser->root.error )
return parser->root.error;
cur = parser->root.cursor;
break;
}
}
}
}
}
return parser->root.error;
}
static void
t42_init_loader( T42_Loader loader,
T42_Face face )
{
FT_UNUSED( face );
FT_MEM_SET( loader, 0, sizeof ( *loader ) );
loader->num_glyphs = 0;
loader->num_chars = 0;
/* initialize the tables -- simply set their `init' field to 0 */
loader->encoding_table.init = 0;
loader->charstrings.init = 0;
loader->glyph_names.init = 0;
}
static void
t42_done_loader( T42_Loader loader )
{
T42_Parser parser = &loader->parser;
/* finalize tables */
T1_Release_Table( &loader->encoding_table );
T1_Release_Table( &loader->charstrings );
T1_Release_Table( &loader->glyph_names );
/* finalize parser */
T42_Finalize_Parser( parser );
}
static FT_Error
T42_Open_Face( T42_Face face )
{
T42_LoaderRec loader;
T42_Parser parser;
T42_Font type42 = &face->type42;
FT_Memory memory = face->root.memory;
FT_Error error;
PSAux_Service psaux = (PSAux_Service)face->psaux;
t42_init_loader( &loader, face );
parser = &loader.parser;
if ( FT_ALLOC( face->ttf_data, 12 ) )
goto Exit;
error = T42_New_Parser( parser,
face->root.stream,
memory,
psaux);
if ( error )
goto Exit;
error = parse_dict( face, &loader, parser->base_dict, parser->base_len );
if ( type42->font_type != 42 )
{
error = T42_Err_Unknown_File_Format;
goto Exit;
}
/* now, propagate the charstrings and glyphnames tables */
/* to the Type42 data */
type42->num_glyphs = loader.num_glyphs;
if ( !loader.charstrings.init ) {
FT_ERROR(( "T42_Open_Face: no charstrings array in face!\n" ));
error = T42_Err_Invalid_File_Format;
}
loader.charstrings.init = 0;
type42->charstrings_block = loader.charstrings.block;
type42->charstrings = loader.charstrings.elements;
type42->charstrings_len = loader.charstrings.lengths;
/* we copy the glyph names `block' and `elements' fields; */
/* the `lengths' field must be released later */
type42->glyph_names_block = loader.glyph_names.block;
type42->glyph_names = (FT_String**)loader.glyph_names.elements;
loader.glyph_names.block = 0;
loader.glyph_names.elements = 0;
/* we must now build type42.encoding when we have a custom array */
if ( type42->encoding_type == T42_ENCODING_TYPE_ARRAY )
{
FT_Int charcode, idx, min_char, max_char;
FT_Byte* char_name;
FT_Byte* glyph_name;
/* OK, we do the following: for each element in the encoding */
/* table, look up the index of the glyph having the same name */
/* as defined in the CharStrings array. */
/* The index is then stored in type42.encoding.char_index, and */
/* the name in type42.encoding.char_name */
min_char = +32000;
max_char = -32000;
charcode = 0;
for ( ; charcode < loader.encoding_table.max_elems; charcode++ )
{
type42->encoding.char_index[charcode] = 0;
type42->encoding.char_name [charcode] = (char *)".notdef";
char_name = loader.encoding_table.elements[charcode];
if ( char_name )
for ( idx = 0; idx < type42->num_glyphs; idx++ )
{
glyph_name = (FT_Byte*)type42->glyph_names[idx];
if ( ft_strcmp( (const char*)char_name,
(const char*)glyph_name ) == 0 )
{
type42->encoding.char_index[charcode] = (FT_UShort)idx;
type42->encoding.char_name [charcode] = (char*)glyph_name;
/* Change min/max encoded char only if glyph name is */
/* not /.notdef */
if ( ft_strcmp( (const char*)".notdef",
(const char*)glyph_name ) != 0 )
{
if ( charcode < min_char ) min_char = charcode;
if ( charcode > max_char ) max_char = charcode;
}
break;
}
}
}
type42->encoding.code_first = min_char;
type42->encoding.code_last = max_char;
type42->encoding.num_chars = loader.num_chars;
}
Exit:
t42_done_loader( &loader );
return error;
}
/***************** Driver Functions *************/
/*************************************************************************/
/* */
/* <Description> */
/* The face object constructor. */
/* */
/* <Input> */
/* stream :: input stream where to load font data. */
/* */
/* face_index :: The index of the font face in the resource. */
/* */
/* num_params :: Number of additional generic parameters. Ignored. */
/* */
/* params :: Additional generic parameters. Ignored. */
/* */
/* <InOut> */
/* face :: The face record to build. */
/* */
/* <Return> */
/* FreeType error code. 0 means success. */
/* */
static FT_Error
T42_Face_Init( FT_Stream stream,
T42_Face face,
FT_Int face_index,
FT_Int num_params,
FT_Parameter* params)
{
FT_Error error;
PSNames_Service psnames;
PSAux_Service psaux;
FT_Face root = (FT_Face)&face->root;
FT_CharMap charmap = face->charmaprecs;
FT_UNUSED( num_params );
FT_UNUSED( params );
FT_UNUSED( face_index );
FT_UNUSED( stream );
face->ttf_face = NULL;
face->root.num_faces = 1;
/* XXX */
psnames = (PSNames_Service)face->psnames;
if ( !psnames )
{
psnames = (PSNames_Service)
FT_Get_Module_Interface( FT_FACE_LIBRARY( face ),
"psnames" );
face->psnames = psnames;
}
psaux = (PSAux_Service)face->psaux;
if ( !psaux )
{
psaux = (PSAux_Service)
FT_Get_Module_Interface( FT_FACE_LIBRARY( face ),
"psaux" );
face->psaux = psaux;
}
/* open the tokenizer, this will also check the font format */
error = T42_Open_Face( face );
if ( error )
goto Exit;
/* if we just wanted to check the format, leave successfully now */
if ( face_index < 0 )
goto Exit;
/* check the face index */
if ( face_index != 0 )
{
FT_ERROR(( "T42_Face_Init: invalid face index\n" ));
error = T42_Err_Invalid_Argument;
goto Exit;
}
/* Now, load the font program into the face object */
/* Init the face object fields */
/* Now set up root face fields */
root->num_glyphs = face->type42.num_glyphs;
root->num_charmaps = 1;
root->face_index = face_index;
root->face_flags = FT_FACE_FLAG_SCALABLE;
root->face_flags |= FT_FACE_FLAG_HORIZONTAL;
root->face_flags |= FT_FACE_FLAG_GLYPH_NAMES;
if ( face->type42.font_info.is_fixed_pitch )
root->face_flags |= FT_FACE_FLAG_FIXED_WIDTH;
/* XXX: TODO -- add kerning with .afm support */
/* get style name -- be careful, some broken fonts only */
/* have a `/FontName' dictionary entry! */
root->family_name = face->type42.font_info.family_name;
if ( root->family_name )
{
char* full = face->type42.font_info.full_name;
char* family = root->family_name;
if ( full )
{
while ( *family && *full == *family )
{
family++;
full++;
}
root->style_name = ( *full == ' ' ? full + 1
: (char *)"Regular" );
}
else
root->style_name = (char *)"Regular";
}
else
{
/* do we have a `/FontName'? */
if ( face->type42.font_name )
{
root->family_name = face->type42.font_name;
root->style_name = (char *)"Regular";
}
}
/* no embedded bitmap support */
root->num_fixed_sizes = 0;
root->available_sizes = 0;
/* Load the TTF font embedded in the T42 font */
error = FT_New_Memory_Face( FT_FACE_LIBRARY( face ),
face->ttf_data,
face->ttf_size,
0,
&face->ttf_face );
if ( error )
goto Exit;
/* Ignore info in FontInfo dictionary and use the info from the */
/* loaded TTF font. The PostScript interpreter also ignores it. */
root->bbox = face->ttf_face->bbox;
root->units_per_EM = face->ttf_face->units_per_EM;
root->ascender = face->ttf_face->ascender;
root->descender = face->ttf_face->descender;
root->height = face->ttf_face->height;
root->max_advance_width = face->ttf_face->max_advance_width;
root->max_advance_height = face->ttf_face->max_advance_height;
root->underline_position = face->type42.font_info.underline_position;
root->underline_thickness = face->type42.font_info.underline_thickness;
root->internal->max_points = 0;
root->internal->max_contours = 0;
/* compute style flags */
root->style_flags = 0;
if ( face->type42.font_info.italic_angle )
root->style_flags |= FT_STYLE_FLAG_ITALIC;
if ( face->ttf_face->style_flags & FT_STYLE_FLAG_BOLD )
root->style_flags |= FT_STYLE_FLAG_BOLD;
if ( face->ttf_face->face_flags & FT_FACE_FLAG_VERTICAL )
root->face_flags |= FT_FACE_FLAG_VERTICAL;
/* XXX: Add support for new cmaps code in FT 2.1.0 */
/* charmap support -- synthetize unicode charmap if possible */
/* synthesize a Unicode charmap if there is support in the `PSNames' */
/* module */
if ( psnames && psnames->unicode_value )
{
error = psnames->build_unicodes( root->memory,
face->type42.num_glyphs,
(const char**)face->type42.glyph_names,
&face->unicode_map );
if ( !error )
{
root->charmap = charmap;
charmap->face = (FT_Face)face;
charmap->encoding = ft_encoding_unicode;
charmap->platform_id = 3;
charmap->encoding_id = 1;
charmap++;
}
/* XXX: Is the following code correct? It is used in t1objs.c */
/* simply clear the error in case of failure (which really) */
/* means that out of memory or no unicode glyph names */
error = T42_Err_Ok;
}
/* now, support either the standard, expert, or custom encoding */
charmap->face = (FT_Face)face;
charmap->platform_id = 7; /* a new platform id for Adobe fonts? */
switch ( face->type42.encoding_type )
{
case T42_ENCODING_TYPE_STANDARD:
charmap->encoding = ft_encoding_adobe_standard;
charmap->encoding_id = 0;
break;
case T42_ENCODING_TYPE_EXPERT:
charmap->encoding = ft_encoding_adobe_expert;
charmap->encoding_id = 1;
break;
case T42_ENCODING_TYPE_ARRAY:
charmap->encoding = ft_encoding_adobe_custom;
charmap->encoding_id = 2;
break;
case T42_ENCODING_TYPE_ISOLATIN1:
charmap->encoding = ft_encoding_latin_1;
charmap->encoding_id = 3;
break;
default:
FT_ERROR(( "T42_Face_Init: invalid encoding\n" ));
error = T42_Err_Invalid_File_Format;
goto Exit;
}
root->charmaps = face->charmaps;
root->num_charmaps = charmap - face->charmaprecs + 1;
face->charmaps[0] = &face->charmaprecs[0];
face->charmaps[1] = &face->charmaprecs[1];
Exit:
return error;
}
/*************************************************************************/
/* */
/* <Function> */
/* T42_Face_Done */
/* */
/* <Description> */
/* The face object destructor. */
/* */
/* <Input> */
/* face :: A typeless pointer to the face object to destroy. */
/* */
static void
T42_Face_Done( T42_Face face )
{
T42_Font type42;
PS_FontInfo info;
FT_Memory memory;
if ( face )
{
type42 = &face->type42;
info = &type42->font_info;
memory = face->root.memory;
/* delete internal ttf face prior to freeing face->ttf_data */
if ( face->ttf_face )
FT_Done_Face( face->ttf_face );
/* release font info strings */
FT_FREE( info->version );
FT_FREE( info->notice );
FT_FREE( info->full_name );
FT_FREE( info->family_name );
FT_FREE( info->weight );
/* release top dictionary */
FT_FREE( type42->charstrings_len );
FT_FREE( type42->charstrings );
FT_FREE( type42->glyph_names );
FT_FREE( type42->charstrings_block );
FT_FREE( type42->glyph_names_block );
FT_FREE( type42->encoding.char_index );
FT_FREE( type42->encoding.char_name );
FT_FREE( type42->font_name );
FT_FREE( face->ttf_data );
#if 0
/* release afm data if present */
if ( face->afm_data )
T1_Done_AFM( memory, (T1_AFM*)face->afm_data );
#endif
/* release unicode map, if any */
FT_FREE( face->unicode_map.maps );
face->unicode_map.num_maps = 0;
face->root.family_name = 0;
face->root.style_name = 0;
}
}
/*************************************************************************/
/* */
/* <Function> */
/* T42_Driver_Init */
/* */
/* <Description> */
/* Initializes a given Type 42 driver object. */
/* */
/* <Input> */
/* driver :: A handle to the target driver object. */
/* */
/* <Return> */
/* FreeType error code. 0 means success. */
/* */
static FT_Error
T42_Driver_Init( T42_Driver driver )
{
FT_Module ttmodule;
ttmodule = FT_Get_Module( driver->root.root.library, "truetype" );
driver->ttclazz = (FT_Driver_Class)ttmodule->clazz;
/* XXX: What about hinter support? */
#if 0
if (ttmodule->clazz->module_flags & ft_module_driver_has_hinter)
driver->root.clazz->root.module_flags |= ft_module_driver_has_hinter;
#endif
return T42_Err_Ok;
}
static void
T42_Driver_Done( T42_Driver driver )
{
FT_UNUSED( driver );
}
/*************************************************************************/
/* */
/* <Function> */
/* Get_Char_Index */
/* */
/* <Description> */
/* Uses a charmap to return a given character code's glyph index. */
/* */
/* <Input> */
/* charmap :: A handle to the source charmap object. */
/* */
/* charcode :: The character code. */
/* */
/* <Return> */
/* Glyph index. 0 means `undefined character code'. */
/* */
static FT_UInt
Get_Char_Index( FT_CharMap charmap,
FT_Long charcode )
{
T42_Face face;
FT_UInt result = 0;
PSNames_Service psnames;
face = (T42_Face)charmap->face;
psnames = (PSNames_Service)face->psnames;
if (!psnames )
goto Exit;
switch ( charmap->encoding )
{
/*******************************************************************/
/* */
/* Unicode encoding support */
/* */
case ft_encoding_unicode:
/* if this charmap is used, we ignore the encoding of the font and */
/* use the `PSNames' module to synthetize the Unicode charmap */
result = psnames->lookup_unicode( &face->unicode_map,
(FT_ULong)charcode );
/* the function returns 0xFFFF if the Unicode charcode has */
/* no corresponding glyph */
if ( result == 0xFFFFU )
result = 0;
/* The result returned is the index (position)in the CharStrings */
/* array. This must be used now to get the value associated to */
/* that glyph_name, which is the real index within the truetype */
/* structure. */
result = ft_atoi( (const char*)face->type42.charstrings[result] );
goto Exit;
/*******************************************************************/
/* */
/* ISOLatin1 encoding support */
/* */
case ft_encoding_latin_1:
/* ISOLatin1 is the first page of Unicode */
if ( charcode < 256 && psnames->unicode_value )
{
result = psnames->lookup_unicode( &face->unicode_map,
(FT_ULong)charcode );
/* the function returns 0xFFFF if the Unicode charcode has */
/* no corresponding glyph */
if ( result == 0xFFFFU )
result = 0;
}
goto Exit;
/*******************************************************************/
/* */
/* Custom Type 1 encoding */
/* */
case ft_encoding_adobe_custom:
{
T1_Encoding encoding = &face->type42.encoding;
if ( charcode >= encoding->code_first &&
charcode <= encoding->code_last )
{
FT_UInt idx = encoding->char_index[charcode];
result = ft_atoi( (const char *)face->type42.charstrings[idx] );
}
goto Exit;
}
/*******************************************************************/
/* */
/* Adobe Standard & Expert encoding support */
/* */
default:
if ( charcode < 256 )
{
FT_UInt code;
FT_Int n;
const char* glyph_name;
code = psnames->adobe_std_encoding[charcode];
if ( charmap->encoding == ft_encoding_adobe_expert )
code = psnames->adobe_expert_encoding[charcode];
glyph_name = psnames->adobe_std_strings( code );
if ( !glyph_name )
break;
for ( n = 0; n < face->type42.num_glyphs; n++ )
{
const char* gname = face->type42.glyph_names[n];
if ( gname && ( ft_strcmp( gname, glyph_name ) == 0 ) )
{
result = ft_atoi( (const char *)face->type42.charstrings[n] );
break;
}
}
}
}
Exit:
return result;
}
static FT_Error
T42_Size_Init( T42_Size size )
{
FT_Face face = size->root.face;
T42_Face t42face = (T42_Face)face;
FT_Size ttsize;
FT_Error error = T42_Err_Ok;
if ( face->size == NULL )
{
/* First size for this face */
size->ttsize = t42face->ttf_face->size;
}
else
{
error = FT_New_Size( t42face->ttf_face, &ttsize );
size->ttsize = ttsize;
}
return error;
}
static void
T42_Size_Done( T42_Size size )
{
FT_Face face = size->root.face;
T42_Face t42face = (T42_Face)face;
FT_ListNode node;
node = FT_List_Find( &t42face->ttf_face->sizes_list, size->ttsize );
if ( node )
FT_Done_Size( size->ttsize );
}
static FT_Error
T42_GlyphSlot_Init( T42_GlyphSlot slot )
{
FT_Face face = slot->root.face;
T42_Face t42face = (T42_Face)face;
FT_GlyphSlot ttslot;
FT_Error error = T42_Err_Ok;
if ( face->glyph == NULL )
{
/* First glyph slot for this face */
slot->ttslot = t42face->ttf_face->glyph;
}
else
{
error = FT_New_GlyphSlot( t42face->ttf_face, &ttslot );
slot->ttslot = ttslot;
}
return error;
}
static void
T42_GlyphSlot_Done( T42_GlyphSlot slot )
{
FT_Face face = slot->root.face;
T42_Face t42face = (T42_Face)face;
FT_GlyphSlot cur = t42face->ttf_face->glyph;
while ( cur )
{
if ( cur == slot->ttslot )
{
FT_Done_GlyphSlot( slot->ttslot );
break;
}
cur = cur->next;
}
}
static FT_Error
T42_Char_Size( T42_Size size,
FT_F26Dot6 char_width,
FT_F26Dot6 char_height,
FT_UInt horz_resolution,
FT_UInt vert_resolution )
{
FT_Face face = size->root.face;
T42_Face t42face = (T42_Face)face;
return FT_Set_Char_Size( t42face->ttf_face,
char_width,
char_height,
horz_resolution,
vert_resolution );
}
static FT_Error
T42_Pixel_Size( T42_Size size,
FT_UInt pixel_width,
FT_UInt pixel_height )
{
FT_Face face = size->root.face;
T42_Face t42face = (T42_Face)face;
return FT_Set_Pixel_Sizes( t42face->ttf_face,
pixel_width,
pixel_height );
}
static void
ft_glyphslot_clear( FT_GlyphSlot slot )
{
/* free bitmap if needed */
if ( slot->flags & FT_GLYPH_OWN_BITMAP )
{
FT_Memory memory = FT_FACE_MEMORY( slot->face );
FT_FREE( slot->bitmap.buffer );
slot->flags &= ~FT_GLYPH_OWN_BITMAP;
}
/* clear all public fields in the glyph slot */
FT_MEM_SET( &slot->metrics, 0, sizeof ( slot->metrics ) );
FT_MEM_SET( &slot->outline, 0, sizeof ( slot->outline ) );
FT_MEM_SET( &slot->bitmap, 0, sizeof ( slot->bitmap ) );
slot->bitmap_left = 0;
slot->bitmap_top = 0;
slot->num_subglyphs = 0;
slot->subglyphs = 0;
slot->control_data = 0;
slot->control_len = 0;
slot->other = 0;
slot->format = ft_glyph_format_none;
slot->linearHoriAdvance = 0;
slot->linearVertAdvance = 0;
}
static FT_Error
T42_Load_Glyph( FT_GlyphSlot glyph,
FT_Size size,
FT_Int glyph_index,
FT_Int load_flags )
{
FT_Error error;
T42_GlyphSlot t42slot = (T42_GlyphSlot)glyph;
T42_Size t42size = (T42_Size)size;
FT_Driver_Class ttclazz = ((T42_Driver)glyph->face->driver)->ttclazz;
ft_glyphslot_clear( t42slot->ttslot );
error = ttclazz->load_glyph( t42slot->ttslot,
t42size->ttsize,
glyph_index,
load_flags | FT_LOAD_NO_BITMAP );
if ( !error )
{
glyph->metrics = t42slot->ttslot->metrics;
glyph->linearHoriAdvance = t42slot->ttslot->linearHoriAdvance;
glyph->linearVertAdvance = t42slot->ttslot->linearVertAdvance;
glyph->format = t42slot->ttslot->format;
glyph->outline = t42slot->ttslot->outline;
glyph->bitmap = t42slot->ttslot->bitmap;
glyph->bitmap_left = t42slot->ttslot->bitmap_left;
glyph->bitmap_top = t42slot->ttslot->bitmap_top;
}
return error;
}
/*************************************************************************/
/* */
/* <Function> */
/* Get_Next_Char */
/* */
/* <Description> */
/* Uses a charmap to return the next encoded char. */
/* */
/* <Input> */
/* charmap :: A handle to the source charmap object. */
/* */
/* charcode :: The character code. */
/* */
/* <Return> */
/* Next char code. 0 means `no more char codes'. */
/* */
static FT_Long
Get_Next_Char( FT_CharMap charmap,
FT_Long charcode )
{
T42_Face face;
PSNames_Service psnames;
face = (T42_Face)charmap->face;
psnames = (PSNames_Service)face->psnames;
if ( psnames )
switch ( charmap->encoding )
{
/*******************************************************************/
/* */
/* Unicode encoding support */
/* */
case ft_encoding_unicode:
/* use the `PSNames' module to synthetize the Unicode charmap */
return psnames->next_unicode( &face->unicode_map,
(FT_ULong)charcode );
/*******************************************************************/
/* */
/* ISOLatin1 encoding support */
/* */
case ft_encoding_latin_1:
{
FT_ULong code;
/* use the `PSNames' module to synthetize the Unicode charmap */
code = psnames->next_unicode( &face->unicode_map,
(FT_ULong)charcode );
if ( code < 256 )
return code;
break;
}
/*******************************************************************/
/* */
/* Custom Type 1 encoding */
/* */
case ft_encoding_adobe_custom:
{
T1_Encoding encoding = &face->type42.encoding;
charcode++;
if ( charcode < encoding->code_first )
charcode = encoding->code_first;
while ( charcode <= encoding->code_last ) {
if ( encoding->char_index[charcode] )
return charcode;
charcode++;
}
}
/*******************************************************************/
/* */
/* Adobe Standard & Expert encoding support */
/* */
default:
while ( ++charcode < 256 )
{
FT_UInt code;
FT_Int n;
const char* glyph_name;
code = psnames->adobe_std_encoding[charcode];
if ( charmap->encoding == ft_encoding_adobe_expert )
code = psnames->adobe_expert_encoding[charcode];
glyph_name = psnames->adobe_std_strings( code );
if ( !glyph_name )
continue;
for ( n = 0; n < face->type42.num_glyphs; n++ )
{
const char* gname = face->type42.glyph_names[n];
if ( gname && gname[0] == glyph_name[0] &&
ft_strcmp( gname, glyph_name ) == 0 )
return charcode;
}
}
}
return 0;
}
static FT_Error
t42_get_glyph_name( T42_Face face,
FT_UInt glyph_index,
FT_Pointer buffer,
FT_UInt buffer_max )
{
FT_String* gname;
gname = face->type42.glyph_names[glyph_index];
if ( buffer_max > 0 )
{
FT_UInt len = (FT_UInt)( ft_strlen( gname ) );
if ( len >= buffer_max )
len = buffer_max - 1;
FT_MEM_COPY( buffer, gname, len );
((FT_Byte*)buffer)[len] = 0;
}
return T42_Err_Ok;
}
static const char*
t42_get_ps_name( T42_Face face )
{
return (const char*)face->type42.font_name;
}
static FT_UInt
t42_get_name_index( T42_Face face,
FT_String* glyph_name )
{
FT_Int i;
FT_String* gname;
for ( i = 0; i < face->type42.num_glyphs; i++ )
{
gname = face->type42.glyph_names[i];
if ( !ft_strcmp( glyph_name, gname ) )
return ft_atoi( (const char *)face->type42.charstrings[i] );
}
return 0;
}
static FT_Module_Interface
Get_Interface( FT_Driver driver,
const FT_String* t42_interface )
{
FT_UNUSED( driver );
/* Any additional interface are defined here */
if (ft_strcmp( (const char*)t42_interface, "glyph_name" ) == 0 )
return (FT_Module_Interface)t42_get_glyph_name;
if ( ft_strcmp( (const char*)t42_interface, "name_index" ) == 0 )
return (FT_Module_Interface)t42_get_name_index;
if ( ft_strcmp( (const char*)t42_interface, "postscript_name" ) == 0 )
return (FT_Module_Interface)t42_get_ps_name;
return 0;
}
const FT_Driver_ClassRec t42_driver_class =
{
{
ft_module_font_driver |
ft_module_driver_scalable |
ft_module_driver_has_hinter,
sizeof ( T42_DriverRec ),
"type42",
0x10000L,
0x20000L,
0, /* format interface */
(FT_Module_Constructor)T42_Driver_Init,
(FT_Module_Destructor) T42_Driver_Done,
(FT_Module_Requester) Get_Interface,
},
sizeof ( T42_FaceRec ),
sizeof ( T42_SizeRec ),
sizeof ( T42_GlyphSlotRec ),
(FT_Face_InitFunc) T42_Face_Init,
(FT_Face_DoneFunc) T42_Face_Done,
(FT_Size_InitFunc) T42_Size_Init,
(FT_Size_DoneFunc) T42_Size_Done,
(FT_Slot_InitFunc) T42_GlyphSlot_Init,
(FT_Slot_DoneFunc) T42_GlyphSlot_Done,
(FT_Size_ResetPointsFunc) T42_Char_Size,
(FT_Size_ResetPixelsFunc) T42_Pixel_Size,
(FT_Slot_LoadFunc) T42_Load_Glyph,
(FT_CharMap_CharIndexFunc)Get_Char_Index,
(FT_Face_GetKerningFunc) 0,
(FT_Face_AttachFunc) 0,
(FT_Face_GetAdvancesFunc) 0,
(FT_CharMap_CharNextFunc) Get_Next_Char
};
#ifdef FT_CONFIG_OPTION_DYNAMIC_DRIVERS
/*************************************************************************/
/* */
/* <Function> */
/* getDriverClass */
/* */
/* <Description> */
/* This function is used when compiling the TrueType driver as a */
/* shared library (`.DLL' or `.so'). It will be used by the */
/* high-level library of FreeType to retrieve the address of the */
/* driver's generic interface. */
/* */
/* It shouldn't be implemented in a static build, as each driver must */
/* have the same function as an exported entry point. */
/* */
/* <Return> */
/* The address of the T42's driver generic interface. The */
/* format-specific interface can then be retrieved through the method */
/* interface->get_format_interface. */
/* */
FT_EXPORT_DEF( const FT_Driver_Class )
getDriverClass( void )
{
return &t42_driver_class;
}
#endif /* FT_CONFIG_OPTION_DYNAMIC_DRIVERS */
/* END */