forked from minhngoc25a/freetype2
1226 lines
45 KiB
C
1226 lines
45 KiB
C
/***************************************************************************/
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/* */
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/* ttload.c */
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/* */
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/* Load the basic TrueType tables, i.e., tables that can be either in */
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/* TTF or OTF fonts (body). */
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/* */
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/* Copyright 1996-2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 by */
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/* David Turner, Robert Wilhelm, and Werner Lemberg. */
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/* */
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/* This file is part of the FreeType project, and may only be used, */
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/* modified, and distributed under the terms of the FreeType project */
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/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
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/* this file you indicate that you have read the license and */
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/* understand and accept it fully. */
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/* */
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/***************************************************************************/
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#include <ft2build.h>
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#include FT_INTERNAL_DEBUG_H
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#include FT_INTERNAL_STREAM_H
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#include FT_TRUETYPE_TAGS_H
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#include "ttload.h"
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#include "sferrors.h"
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/*************************************************************************/
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/* */
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/* The macro FT_COMPONENT is used in trace mode. It is an implicit */
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/* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */
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/* messages during execution. */
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/* */
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#undef FT_COMPONENT
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#define FT_COMPONENT trace_ttload
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/*************************************************************************/
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/* */
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/* <Function> */
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/* tt_face_lookup_table */
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/* */
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/* <Description> */
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/* Looks for a TrueType table by name. */
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/* */
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/* <Input> */
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/* face :: A face object handle. */
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/* */
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/* tag :: The searched tag. */
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/* */
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/* <Return> */
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/* A pointer to the table directory entry. 0 if not found. */
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/* */
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FT_LOCAL_DEF( TT_Table )
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tt_face_lookup_table( TT_Face face,
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FT_ULong tag )
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{
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TT_Table entry;
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TT_Table limit;
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FT_TRACE4(( "tt_face_lookup_table: %08p, `%c%c%c%c' -- ",
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face,
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(FT_Char)( tag >> 24 ),
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(FT_Char)( tag >> 16 ),
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(FT_Char)( tag >> 8 ),
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(FT_Char)( tag ) ));
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entry = face->dir_tables;
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limit = entry + face->num_tables;
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for ( ; entry < limit; entry++ )
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{
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/* For compatibility with Windows, we consider 0-length */
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/* tables the same as missing tables. */
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if ( entry->Tag == tag && entry->Length != 0 )
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{
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FT_TRACE4(( "found table.\n" ));
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return entry;
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}
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}
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FT_TRACE4(( "could not find table!\n" ));
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return 0;
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}
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/*************************************************************************/
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/* */
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/* <Function> */
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/* tt_face_goto_table */
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/* */
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/* <Description> */
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/* Looks for a TrueType table by name, then seek a stream to it. */
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/* */
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/* <Input> */
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/* face :: A face object handle. */
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/* */
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/* tag :: The searched tag. */
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/* */
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/* stream :: The stream to seek when the table is found. */
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/* */
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/* <Output> */
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/* length :: The length of the table if found, undefined otherwise. */
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/* */
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/* <Return> */
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/* FreeType error code. 0 means success. */
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/* */
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FT_LOCAL_DEF( FT_Error )
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tt_face_goto_table( TT_Face face,
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FT_ULong tag,
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FT_Stream stream,
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FT_ULong* length )
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{
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TT_Table table;
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FT_Error error;
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table = tt_face_lookup_table( face, tag );
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if ( table )
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{
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if ( length )
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*length = table->Length;
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if ( FT_STREAM_SEEK( table->Offset ) )
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goto Exit;
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}
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else
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error = SFNT_Err_Table_Missing;
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Exit:
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return error;
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}
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/* Here, we */
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/* */
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/* - check that `num_tables' is valid (and adjust it if necessary) */
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/* */
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/* - look for a `head' table, check its size, and parse it to check */
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/* whether its `magic' field is correctly set */
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/* */
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static FT_Error
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check_table_dir( SFNT_Header sfnt,
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FT_Stream stream )
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{
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FT_Error error;
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FT_UInt nn, valid_entries = 0;
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FT_UInt has_head = 0, has_sing = 0, has_meta = 0;
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FT_ULong offset = sfnt->offset + 12;
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static const FT_Frame_Field table_dir_entry_fields[] =
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{
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#undef FT_STRUCTURE
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#define FT_STRUCTURE TT_TableRec
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FT_FRAME_START( 16 ),
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FT_FRAME_ULONG( Tag ),
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FT_FRAME_ULONG( CheckSum ),
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FT_FRAME_ULONG( Offset ),
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FT_FRAME_ULONG( Length ),
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FT_FRAME_END
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};
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if ( FT_STREAM_SEEK( offset ) )
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goto Exit;
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for ( nn = 0; nn < sfnt->num_tables; nn++ )
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{
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TT_TableRec table;
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if ( FT_STREAM_READ_FIELDS( table_dir_entry_fields, &table ) )
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{
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nn--;
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FT_TRACE2(( "check_table_dir:"
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" can read only %d table%s in font (instead of %d)\n",
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nn, nn == 1 ? "" : "s", sfnt->num_tables ));
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sfnt->num_tables = nn;
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break;
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}
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/* we ignore invalid tables */
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if ( table.Offset + table.Length > stream->size )
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{
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FT_TRACE2(( "check_table_dir: table entry %d invalid\n", nn ));
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continue;
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}
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else
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valid_entries++;
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if ( table.Tag == TTAG_head || table.Tag == TTAG_bhed )
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{
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FT_UInt32 magic;
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#ifndef TT_CONFIG_OPTION_EMBEDDED_BITMAPS
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if ( table.Tag == TTAG_head )
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#endif
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has_head = 1;
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/*
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* The table length should be 0x36, but certain font tools make it
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* 0x38, so we will just check that it is greater.
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*
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* Note that according to the specification, the table must be
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* padded to 32-bit lengths, but this doesn't apply to the value of
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* its `Length' field!
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*
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*/
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if ( table.Length < 0x36 )
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{
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FT_TRACE2(( "check_table_dir: `head' table too small\n" ));
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error = SFNT_Err_Unknown_File_Format;
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goto Exit;
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}
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if ( FT_STREAM_SEEK( table.Offset + 12 ) ||
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FT_READ_ULONG( magic ) )
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goto Exit;
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if ( magic != 0x5F0F3CF5UL )
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{
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FT_TRACE2(( "check_table_dir:"
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" no magic number found in `head' table\n"));
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error = SFNT_Err_Unknown_File_Format;
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goto Exit;
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}
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if ( FT_STREAM_SEEK( offset + ( nn + 1 ) * 16 ) )
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goto Exit;
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}
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else if ( table.Tag == TTAG_SING )
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has_sing = 1;
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else if ( table.Tag == TTAG_META )
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has_meta = 1;
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}
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sfnt->num_tables = valid_entries;
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if ( sfnt->num_tables == 0 )
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{
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FT_TRACE2(( "check_table_dir: no tables found\n" ));
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error = SFNT_Err_Unknown_File_Format;
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goto Exit;
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}
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/* if `sing' and `meta' tables are present, there is no `head' table */
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if ( has_head || ( has_sing && has_meta ) )
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{
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error = SFNT_Err_Ok;
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goto Exit;
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}
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else
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{
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FT_TRACE2(( "check_table_dir:" ));
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#ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS
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FT_TRACE2(( " neither `head', `bhed', nor `sing' table found\n" ));
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#else
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FT_TRACE2(( " neither `head' nor `sing' table found\n" ));
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#endif
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error = SFNT_Err_Unknown_File_Format;
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}
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Exit:
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return error;
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}
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/*************************************************************************/
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/* */
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/* <Function> */
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/* tt_face_load_font_dir */
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/* */
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/* <Description> */
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/* Loads the header of a SFNT font file. */
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/* */
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/* <Input> */
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/* face :: A handle to the target face object. */
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/* */
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/* stream :: The input stream. */
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/* */
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/* <Output> */
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/* sfnt :: The SFNT header. */
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/* */
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/* <Return> */
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/* FreeType error code. 0 means success. */
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/* */
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/* <Note> */
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/* The stream cursor must be at the beginning of the font directory. */
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/* */
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FT_LOCAL_DEF( FT_Error )
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tt_face_load_font_dir( TT_Face face,
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FT_Stream stream )
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{
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SFNT_HeaderRec sfnt;
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FT_Error error;
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FT_Memory memory = stream->memory;
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TT_TableRec* entry;
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FT_Int nn;
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static const FT_Frame_Field offset_table_fields[] =
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{
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#undef FT_STRUCTURE
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#define FT_STRUCTURE SFNT_HeaderRec
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FT_FRAME_START( 8 ),
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FT_FRAME_USHORT( num_tables ),
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FT_FRAME_USHORT( search_range ),
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FT_FRAME_USHORT( entry_selector ),
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FT_FRAME_USHORT( range_shift ),
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FT_FRAME_END
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};
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FT_TRACE2(( "tt_face_load_font_dir: %08p\n", face ));
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/* read the offset table */
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sfnt.offset = FT_STREAM_POS();
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if ( FT_READ_ULONG( sfnt.format_tag ) ||
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FT_STREAM_READ_FIELDS( offset_table_fields, &sfnt ) )
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goto Exit;
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/* many fonts don't have these fields set correctly */
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#if 0
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if ( sfnt.search_range != 1 << ( sfnt.entry_selector + 4 ) ||
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sfnt.search_range + sfnt.range_shift != sfnt.num_tables << 4 )
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return SFNT_Err_Unknown_File_Format;
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#endif
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/* load the table directory */
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FT_TRACE2(( "-- Number of tables: %10u\n", sfnt.num_tables ));
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FT_TRACE2(( "-- Format version: 0x%08lx\n", sfnt.format_tag ));
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/* check first */
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error = check_table_dir( &sfnt, stream );
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if ( error )
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{
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FT_TRACE2(( "tt_face_load_font_dir: invalid table directory!\n" ));
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goto Exit;
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}
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face->num_tables = sfnt.num_tables;
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face->format_tag = sfnt.format_tag;
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if ( FT_QNEW_ARRAY( face->dir_tables, face->num_tables ) )
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goto Exit;
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if ( FT_STREAM_SEEK( sfnt.offset + 12 ) ||
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FT_FRAME_ENTER( face->num_tables * 16L ) )
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goto Exit;
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entry = face->dir_tables;
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for ( nn = 0; nn < sfnt.num_tables; nn++ )
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{
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entry->Tag = FT_GET_TAG4();
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entry->CheckSum = FT_GET_ULONG();
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entry->Offset = FT_GET_LONG();
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entry->Length = FT_GET_LONG();
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/* ignore invalid tables */
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if ( entry->Offset + entry->Length > stream->size )
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continue;
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else
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{
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FT_TRACE2(( " %c%c%c%c - %08lx - %08lx\n",
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(FT_Char)( entry->Tag >> 24 ),
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(FT_Char)( entry->Tag >> 16 ),
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(FT_Char)( entry->Tag >> 8 ),
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(FT_Char)( entry->Tag ),
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entry->Offset,
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entry->Length ));
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entry++;
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}
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}
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FT_FRAME_EXIT();
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FT_TRACE2(( "table directory loaded\n\n" ));
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Exit:
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return error;
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}
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|
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/*************************************************************************/
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/* */
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/* <Function> */
|
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/* tt_face_load_any */
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/* */
|
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/* <Description> */
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/* Loads any font table into client memory. */
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/* */
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/* <Input> */
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/* face :: The face object to look for. */
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/* */
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/* tag :: The tag of table to load. Use the value 0 if you want */
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/* to access the whole font file, else set this parameter */
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/* to a valid TrueType table tag that you can forge with */
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/* the MAKE_TT_TAG macro. */
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|
/* */
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|
/* offset :: The starting offset in the table (or the file if */
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/* tag == 0). */
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|
/* */
|
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/* length :: The address of the decision variable: */
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|
/* */
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/* If length == NULL: */
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/* Loads the whole table. Returns an error if */
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|
/* `offset' == 0! */
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|
/* */
|
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/* If *length == 0: */
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/* Exits immediately; returning the length of the given */
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/* table or of the font file, depending on the value of */
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/* `tag'. */
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/* */
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/* If *length != 0: */
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/* Loads the next `length' bytes of table or font, */
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/* starting at offset `offset' (in table or font too). */
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/* */
|
|
/* <Output> */
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|
/* buffer :: The address of target buffer. */
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|
/* */
|
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/* <Return> */
|
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/* FreeType error code. 0 means success. */
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/* */
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FT_LOCAL_DEF( FT_Error )
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tt_face_load_any( TT_Face face,
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FT_ULong tag,
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FT_Long offset,
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FT_Byte* buffer,
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FT_ULong* length )
|
|
{
|
|
FT_Error error;
|
|
FT_Stream stream;
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TT_Table table;
|
|
FT_ULong size;
|
|
|
|
|
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if ( tag != 0 )
|
|
{
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|
/* look for tag in font directory */
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|
table = tt_face_lookup_table( face, tag );
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|
if ( !table )
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{
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|
error = SFNT_Err_Table_Missing;
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|
goto Exit;
|
|
}
|
|
|
|
offset += table->Offset;
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|
size = table->Length;
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|
}
|
|
else
|
|
/* tag == 0 -- the user wants to access the font file directly */
|
|
size = face->root.stream->size;
|
|
|
|
if ( length && *length == 0 )
|
|
{
|
|
*length = size;
|
|
|
|
return SFNT_Err_Ok;
|
|
}
|
|
|
|
if ( length )
|
|
size = *length;
|
|
|
|
stream = face->root.stream;
|
|
/* the `if' is syntactic sugar for picky compilers */
|
|
if ( FT_STREAM_READ_AT( offset, buffer, size ) )
|
|
goto Exit;
|
|
|
|
Exit:
|
|
return error;
|
|
}
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* tt_face_load_generic_header */
|
|
/* */
|
|
/* <Description> */
|
|
/* Loads the TrueType table `head' or `bhed'. */
|
|
/* */
|
|
/* <Input> */
|
|
/* face :: A handle to the target face object. */
|
|
/* */
|
|
/* stream :: The input stream. */
|
|
/* */
|
|
/* <Return> */
|
|
/* FreeType error code. 0 means success. */
|
|
/* */
|
|
static FT_Error
|
|
tt_face_load_generic_header( TT_Face face,
|
|
FT_Stream stream,
|
|
FT_ULong tag )
|
|
{
|
|
FT_Error error;
|
|
TT_Header* header;
|
|
|
|
static const FT_Frame_Field header_fields[] =
|
|
{
|
|
#undef FT_STRUCTURE
|
|
#define FT_STRUCTURE TT_Header
|
|
|
|
FT_FRAME_START( 54 ),
|
|
FT_FRAME_ULONG ( Table_Version ),
|
|
FT_FRAME_ULONG ( Font_Revision ),
|
|
FT_FRAME_LONG ( CheckSum_Adjust ),
|
|
FT_FRAME_LONG ( Magic_Number ),
|
|
FT_FRAME_USHORT( Flags ),
|
|
FT_FRAME_USHORT( Units_Per_EM ),
|
|
FT_FRAME_LONG ( Created[0] ),
|
|
FT_FRAME_LONG ( Created[1] ),
|
|
FT_FRAME_LONG ( Modified[0] ),
|
|
FT_FRAME_LONG ( Modified[1] ),
|
|
FT_FRAME_SHORT ( xMin ),
|
|
FT_FRAME_SHORT ( yMin ),
|
|
FT_FRAME_SHORT ( xMax ),
|
|
FT_FRAME_SHORT ( yMax ),
|
|
FT_FRAME_USHORT( Mac_Style ),
|
|
FT_FRAME_USHORT( Lowest_Rec_PPEM ),
|
|
FT_FRAME_SHORT ( Font_Direction ),
|
|
FT_FRAME_SHORT ( Index_To_Loc_Format ),
|
|
FT_FRAME_SHORT ( Glyph_Data_Format ),
|
|
FT_FRAME_END
|
|
};
|
|
|
|
|
|
error = face->goto_table( face, tag, stream, 0 );
|
|
if ( error )
|
|
goto Exit;
|
|
|
|
header = &face->header;
|
|
|
|
if ( FT_STREAM_READ_FIELDS( header_fields, header ) )
|
|
goto Exit;
|
|
|
|
FT_TRACE3(( "Units per EM: %4u\n", header->Units_Per_EM ));
|
|
FT_TRACE3(( "IndexToLoc: %4d\n", header->Index_To_Loc_Format ));
|
|
|
|
Exit:
|
|
return error;
|
|
}
|
|
|
|
|
|
FT_LOCAL_DEF( FT_Error )
|
|
tt_face_load_head( TT_Face face,
|
|
FT_Stream stream )
|
|
{
|
|
return tt_face_load_generic_header( face, stream, TTAG_head );
|
|
}
|
|
|
|
|
|
#ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS
|
|
|
|
FT_LOCAL_DEF( FT_Error )
|
|
tt_face_load_bhed( TT_Face face,
|
|
FT_Stream stream )
|
|
{
|
|
return tt_face_load_generic_header( face, stream, TTAG_bhed );
|
|
}
|
|
|
|
#endif /* TT_CONFIG_OPTION_EMBEDDED_BITMAPS */
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* tt_face_load_max_profile */
|
|
/* */
|
|
/* <Description> */
|
|
/* Loads the maximum profile into a face object. */
|
|
/* */
|
|
/* <Input> */
|
|
/* face :: A handle to the target face object. */
|
|
/* */
|
|
/* stream :: The input stream. */
|
|
/* */
|
|
/* <Return> */
|
|
/* FreeType error code. 0 means success. */
|
|
/* */
|
|
FT_LOCAL_DEF( FT_Error )
|
|
tt_face_load_maxp( TT_Face face,
|
|
FT_Stream stream )
|
|
{
|
|
FT_Error error;
|
|
TT_MaxProfile* maxProfile = &face->max_profile;
|
|
|
|
const FT_Frame_Field maxp_fields[] =
|
|
{
|
|
#undef FT_STRUCTURE
|
|
#define FT_STRUCTURE TT_MaxProfile
|
|
|
|
FT_FRAME_START( 6 ),
|
|
FT_FRAME_LONG ( version ),
|
|
FT_FRAME_USHORT( numGlyphs ),
|
|
FT_FRAME_END
|
|
};
|
|
|
|
const FT_Frame_Field maxp_fields_extra[] =
|
|
{
|
|
FT_FRAME_START( 26 ),
|
|
FT_FRAME_USHORT( maxPoints ),
|
|
FT_FRAME_USHORT( maxContours ),
|
|
FT_FRAME_USHORT( maxCompositePoints ),
|
|
FT_FRAME_USHORT( maxCompositeContours ),
|
|
FT_FRAME_USHORT( maxZones ),
|
|
FT_FRAME_USHORT( maxTwilightPoints ),
|
|
FT_FRAME_USHORT( maxStorage ),
|
|
FT_FRAME_USHORT( maxFunctionDefs ),
|
|
FT_FRAME_USHORT( maxInstructionDefs ),
|
|
FT_FRAME_USHORT( maxStackElements ),
|
|
FT_FRAME_USHORT( maxSizeOfInstructions ),
|
|
FT_FRAME_USHORT( maxComponentElements ),
|
|
FT_FRAME_USHORT( maxComponentDepth ),
|
|
FT_FRAME_END
|
|
};
|
|
|
|
|
|
error = face->goto_table( face, TTAG_maxp, stream, 0 );
|
|
if ( error )
|
|
goto Exit;
|
|
|
|
if ( FT_STREAM_READ_FIELDS( maxp_fields, maxProfile ) )
|
|
goto Exit;
|
|
|
|
maxProfile->maxPoints = 0;
|
|
maxProfile->maxContours = 0;
|
|
maxProfile->maxCompositePoints = 0;
|
|
maxProfile->maxCompositeContours = 0;
|
|
maxProfile->maxZones = 0;
|
|
maxProfile->maxTwilightPoints = 0;
|
|
maxProfile->maxStorage = 0;
|
|
maxProfile->maxFunctionDefs = 0;
|
|
maxProfile->maxInstructionDefs = 0;
|
|
maxProfile->maxStackElements = 0;
|
|
maxProfile->maxSizeOfInstructions = 0;
|
|
maxProfile->maxComponentElements = 0;
|
|
maxProfile->maxComponentDepth = 0;
|
|
|
|
if ( maxProfile->version >= 0x10000L )
|
|
{
|
|
if ( FT_STREAM_READ_FIELDS( maxp_fields_extra, maxProfile ) )
|
|
goto Exit;
|
|
|
|
/* XXX: an adjustment that is necessary to load certain */
|
|
/* broken fonts like `Keystrokes MT' :-( */
|
|
/* */
|
|
/* We allocate 64 function entries by default when */
|
|
/* the maxFunctionDefs field is null. */
|
|
|
|
if ( maxProfile->maxFunctionDefs == 0 )
|
|
maxProfile->maxFunctionDefs = 64;
|
|
|
|
/* we add 4 phantom points later */
|
|
if ( maxProfile->maxTwilightPoints > ( 0xFFFFU - 4 ) )
|
|
{
|
|
FT_ERROR(( "Too much twilight points in `maxp' table;\n" ));
|
|
FT_ERROR(( " some glyphs might be rendered incorrectly.\n" ));
|
|
|
|
maxProfile->maxTwilightPoints = 0xFFFFU - 4;
|
|
}
|
|
}
|
|
|
|
FT_TRACE3(( "numGlyphs: %u\n", maxProfile->numGlyphs ));
|
|
|
|
Exit:
|
|
return error;
|
|
}
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* tt_face_load_names */
|
|
/* */
|
|
/* <Description> */
|
|
/* Loads the name records. */
|
|
/* */
|
|
/* <Input> */
|
|
/* face :: A handle to the target face object. */
|
|
/* */
|
|
/* stream :: The input stream. */
|
|
/* */
|
|
/* <Return> */
|
|
/* FreeType error code. 0 means success. */
|
|
/* */
|
|
FT_LOCAL_DEF( FT_Error )
|
|
tt_face_load_name( TT_Face face,
|
|
FT_Stream stream )
|
|
{
|
|
FT_Error error;
|
|
FT_Memory memory = stream->memory;
|
|
FT_ULong table_pos, table_len;
|
|
FT_ULong storage_start, storage_limit;
|
|
FT_UInt count;
|
|
TT_NameTable table;
|
|
|
|
static const FT_Frame_Field name_table_fields[] =
|
|
{
|
|
#undef FT_STRUCTURE
|
|
#define FT_STRUCTURE TT_NameTableRec
|
|
|
|
FT_FRAME_START( 6 ),
|
|
FT_FRAME_USHORT( format ),
|
|
FT_FRAME_USHORT( numNameRecords ),
|
|
FT_FRAME_USHORT( storageOffset ),
|
|
FT_FRAME_END
|
|
};
|
|
|
|
static const FT_Frame_Field name_record_fields[] =
|
|
{
|
|
#undef FT_STRUCTURE
|
|
#define FT_STRUCTURE TT_NameEntryRec
|
|
|
|
/* no FT_FRAME_START */
|
|
FT_FRAME_USHORT( platformID ),
|
|
FT_FRAME_USHORT( encodingID ),
|
|
FT_FRAME_USHORT( languageID ),
|
|
FT_FRAME_USHORT( nameID ),
|
|
FT_FRAME_USHORT( stringLength ),
|
|
FT_FRAME_USHORT( stringOffset ),
|
|
FT_FRAME_END
|
|
};
|
|
|
|
|
|
table = &face->name_table;
|
|
table->stream = stream;
|
|
|
|
error = face->goto_table( face, TTAG_name, stream, &table_len );
|
|
if ( error )
|
|
goto Exit;
|
|
|
|
table_pos = FT_STREAM_POS();
|
|
|
|
|
|
if ( FT_STREAM_READ_FIELDS( name_table_fields, table ) )
|
|
goto Exit;
|
|
|
|
/* Some popular Asian fonts have an invalid `storageOffset' value */
|
|
/* (it should be at least "6 + 12*num_names"). However, the string */
|
|
/* offsets, computed as "storageOffset + entry->stringOffset", are */
|
|
/* valid pointers within the name table... */
|
|
/* */
|
|
/* We thus can't check `storageOffset' right now. */
|
|
/* */
|
|
storage_start = table_pos + 6 + 12*table->numNameRecords;
|
|
storage_limit = table_pos + table_len;
|
|
|
|
if ( storage_start > storage_limit )
|
|
{
|
|
FT_ERROR(( "invalid `name' table\n" ));
|
|
error = SFNT_Err_Name_Table_Missing;
|
|
goto Exit;
|
|
}
|
|
|
|
/* Allocate the array of name records. */
|
|
count = table->numNameRecords;
|
|
table->numNameRecords = 0;
|
|
|
|
if ( FT_NEW_ARRAY( table->names, count ) ||
|
|
FT_FRAME_ENTER( count * 12 ) )
|
|
goto Exit;
|
|
|
|
/* Load the name records and determine how much storage is needed */
|
|
/* to hold the strings themselves. */
|
|
{
|
|
TT_NameEntryRec* entry = table->names;
|
|
|
|
|
|
for ( ; count > 0; count-- )
|
|
{
|
|
if ( FT_STREAM_READ_FIELDS( name_record_fields, entry ) )
|
|
continue;
|
|
|
|
/* check that the name is not empty */
|
|
if ( entry->stringLength == 0 )
|
|
continue;
|
|
|
|
/* check that the name string is within the table */
|
|
entry->stringOffset += table_pos + table->storageOffset;
|
|
if ( entry->stringOffset < storage_start ||
|
|
entry->stringOffset + entry->stringLength > storage_limit )
|
|
{
|
|
/* invalid entry - ignore it */
|
|
entry->stringOffset = 0;
|
|
entry->stringLength = 0;
|
|
continue;
|
|
}
|
|
|
|
entry++;
|
|
}
|
|
|
|
table->numNameRecords = (FT_UInt)( entry - table->names );
|
|
}
|
|
|
|
FT_FRAME_EXIT();
|
|
|
|
/* everything went well, update face->num_names */
|
|
face->num_names = (FT_UShort) table->numNameRecords;
|
|
|
|
Exit:
|
|
return error;
|
|
}
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* tt_face_free_names */
|
|
/* */
|
|
/* <Description> */
|
|
/* Frees the name records. */
|
|
/* */
|
|
/* <Input> */
|
|
/* face :: A handle to the target face object. */
|
|
/* */
|
|
FT_LOCAL_DEF( void )
|
|
tt_face_free_name( TT_Face face )
|
|
{
|
|
FT_Memory memory = face->root.driver->root.memory;
|
|
TT_NameTable table = &face->name_table;
|
|
TT_NameEntry entry = table->names;
|
|
FT_UInt count = table->numNameRecords;
|
|
|
|
|
|
if ( table->names )
|
|
{
|
|
for ( ; count > 0; count--, entry++ )
|
|
{
|
|
FT_FREE( entry->string );
|
|
entry->stringLength = 0;
|
|
}
|
|
|
|
/* free strings table */
|
|
FT_FREE( table->names );
|
|
}
|
|
|
|
table->numNameRecords = 0;
|
|
table->format = 0;
|
|
table->storageOffset = 0;
|
|
}
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* tt_face_load_cmap */
|
|
/* */
|
|
/* <Description> */
|
|
/* Loads the cmap directory in a face object. The cmaps themselves */
|
|
/* are loaded on demand in the `ttcmap.c' module. */
|
|
/* */
|
|
/* <Input> */
|
|
/* face :: A handle to the target face object. */
|
|
/* */
|
|
/* stream :: A handle to the input stream. */
|
|
/* */
|
|
/* <Return> */
|
|
/* FreeType error code. 0 means success. */
|
|
/* */
|
|
|
|
FT_LOCAL_DEF( FT_Error )
|
|
tt_face_load_cmap( TT_Face face,
|
|
FT_Stream stream )
|
|
{
|
|
FT_Error error;
|
|
|
|
|
|
error = face->goto_table( face, TTAG_cmap, stream, &face->cmap_size );
|
|
if ( error )
|
|
goto Exit;
|
|
|
|
if ( FT_FRAME_EXTRACT( face->cmap_size, face->cmap_table ) )
|
|
face->cmap_size = 0;
|
|
|
|
Exit:
|
|
return error;
|
|
}
|
|
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* tt_face_load_os2 */
|
|
/* */
|
|
/* <Description> */
|
|
/* Loads the OS2 table. */
|
|
/* */
|
|
/* <Input> */
|
|
/* face :: A handle to the target face object. */
|
|
/* */
|
|
/* stream :: A handle to the input stream. */
|
|
/* */
|
|
/* <Return> */
|
|
/* FreeType error code. 0 means success. */
|
|
/* */
|
|
FT_LOCAL_DEF( FT_Error )
|
|
tt_face_load_os2( TT_Face face,
|
|
FT_Stream stream )
|
|
{
|
|
FT_Error error;
|
|
TT_OS2* os2;
|
|
|
|
const FT_Frame_Field os2_fields[] =
|
|
{
|
|
#undef FT_STRUCTURE
|
|
#define FT_STRUCTURE TT_OS2
|
|
|
|
FT_FRAME_START( 78 ),
|
|
FT_FRAME_USHORT( version ),
|
|
FT_FRAME_SHORT ( xAvgCharWidth ),
|
|
FT_FRAME_USHORT( usWeightClass ),
|
|
FT_FRAME_USHORT( usWidthClass ),
|
|
FT_FRAME_SHORT ( fsType ),
|
|
FT_FRAME_SHORT ( ySubscriptXSize ),
|
|
FT_FRAME_SHORT ( ySubscriptYSize ),
|
|
FT_FRAME_SHORT ( ySubscriptXOffset ),
|
|
FT_FRAME_SHORT ( ySubscriptYOffset ),
|
|
FT_FRAME_SHORT ( ySuperscriptXSize ),
|
|
FT_FRAME_SHORT ( ySuperscriptYSize ),
|
|
FT_FRAME_SHORT ( ySuperscriptXOffset ),
|
|
FT_FRAME_SHORT ( ySuperscriptYOffset ),
|
|
FT_FRAME_SHORT ( yStrikeoutSize ),
|
|
FT_FRAME_SHORT ( yStrikeoutPosition ),
|
|
FT_FRAME_SHORT ( sFamilyClass ),
|
|
FT_FRAME_BYTE ( panose[0] ),
|
|
FT_FRAME_BYTE ( panose[1] ),
|
|
FT_FRAME_BYTE ( panose[2] ),
|
|
FT_FRAME_BYTE ( panose[3] ),
|
|
FT_FRAME_BYTE ( panose[4] ),
|
|
FT_FRAME_BYTE ( panose[5] ),
|
|
FT_FRAME_BYTE ( panose[6] ),
|
|
FT_FRAME_BYTE ( panose[7] ),
|
|
FT_FRAME_BYTE ( panose[8] ),
|
|
FT_FRAME_BYTE ( panose[9] ),
|
|
FT_FRAME_ULONG ( ulUnicodeRange1 ),
|
|
FT_FRAME_ULONG ( ulUnicodeRange2 ),
|
|
FT_FRAME_ULONG ( ulUnicodeRange3 ),
|
|
FT_FRAME_ULONG ( ulUnicodeRange4 ),
|
|
FT_FRAME_BYTE ( achVendID[0] ),
|
|
FT_FRAME_BYTE ( achVendID[1] ),
|
|
FT_FRAME_BYTE ( achVendID[2] ),
|
|
FT_FRAME_BYTE ( achVendID[3] ),
|
|
|
|
FT_FRAME_USHORT( fsSelection ),
|
|
FT_FRAME_USHORT( usFirstCharIndex ),
|
|
FT_FRAME_USHORT( usLastCharIndex ),
|
|
FT_FRAME_SHORT ( sTypoAscender ),
|
|
FT_FRAME_SHORT ( sTypoDescender ),
|
|
FT_FRAME_SHORT ( sTypoLineGap ),
|
|
FT_FRAME_USHORT( usWinAscent ),
|
|
FT_FRAME_USHORT( usWinDescent ),
|
|
FT_FRAME_END
|
|
};
|
|
|
|
const FT_Frame_Field os2_fields_extra[] =
|
|
{
|
|
FT_FRAME_START( 8 ),
|
|
FT_FRAME_ULONG( ulCodePageRange1 ),
|
|
FT_FRAME_ULONG( ulCodePageRange2 ),
|
|
FT_FRAME_END
|
|
};
|
|
|
|
const FT_Frame_Field os2_fields_extra2[] =
|
|
{
|
|
FT_FRAME_START( 10 ),
|
|
FT_FRAME_SHORT ( sxHeight ),
|
|
FT_FRAME_SHORT ( sCapHeight ),
|
|
FT_FRAME_USHORT( usDefaultChar ),
|
|
FT_FRAME_USHORT( usBreakChar ),
|
|
FT_FRAME_USHORT( usMaxContext ),
|
|
FT_FRAME_END
|
|
};
|
|
|
|
|
|
/* We now support old Mac fonts where the OS/2 table doesn't */
|
|
/* exist. Simply put, we set the `version' field to 0xFFFF */
|
|
/* and test this value each time we need to access the table. */
|
|
error = face->goto_table( face, TTAG_OS2, stream, 0 );
|
|
if ( error )
|
|
goto Exit;
|
|
|
|
os2 = &face->os2;
|
|
|
|
if ( FT_STREAM_READ_FIELDS( os2_fields, os2 ) )
|
|
goto Exit;
|
|
|
|
os2->ulCodePageRange1 = 0;
|
|
os2->ulCodePageRange2 = 0;
|
|
os2->sxHeight = 0;
|
|
os2->sCapHeight = 0;
|
|
os2->usDefaultChar = 0;
|
|
os2->usBreakChar = 0;
|
|
os2->usMaxContext = 0;
|
|
|
|
if ( os2->version >= 0x0001 )
|
|
{
|
|
/* only version 1 tables */
|
|
if ( FT_STREAM_READ_FIELDS( os2_fields_extra, os2 ) )
|
|
goto Exit;
|
|
|
|
if ( os2->version >= 0x0002 )
|
|
{
|
|
/* only version 2 tables */
|
|
if ( FT_STREAM_READ_FIELDS( os2_fields_extra2, os2 ) )
|
|
goto Exit;
|
|
}
|
|
}
|
|
|
|
FT_TRACE3(( "sTypoAscender: %4d\n", os2->sTypoAscender ));
|
|
FT_TRACE3(( "sTypoDescender: %4d\n", os2->sTypoDescender ));
|
|
FT_TRACE3(( "usWinAscent: %4u\n", os2->usWinAscent ));
|
|
FT_TRACE3(( "usWinDescent: %4u\n", os2->usWinDescent ));
|
|
FT_TRACE3(( "fsSelection: 0x%2x\n", os2->fsSelection ));
|
|
|
|
Exit:
|
|
return error;
|
|
}
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* tt_face_load_postscript */
|
|
/* */
|
|
/* <Description> */
|
|
/* Loads the Postscript table. */
|
|
/* */
|
|
/* <Input> */
|
|
/* face :: A handle to the target face object. */
|
|
/* */
|
|
/* stream :: A handle to the input stream. */
|
|
/* */
|
|
/* <Return> */
|
|
/* FreeType error code. 0 means success. */
|
|
/* */
|
|
FT_LOCAL_DEF( FT_Error )
|
|
tt_face_load_post( TT_Face face,
|
|
FT_Stream stream )
|
|
{
|
|
FT_Error error;
|
|
TT_Postscript* post = &face->postscript;
|
|
|
|
static const FT_Frame_Field post_fields[] =
|
|
{
|
|
#undef FT_STRUCTURE
|
|
#define FT_STRUCTURE TT_Postscript
|
|
|
|
FT_FRAME_START( 32 ),
|
|
FT_FRAME_ULONG( FormatType ),
|
|
FT_FRAME_ULONG( italicAngle ),
|
|
FT_FRAME_SHORT( underlinePosition ),
|
|
FT_FRAME_SHORT( underlineThickness ),
|
|
FT_FRAME_ULONG( isFixedPitch ),
|
|
FT_FRAME_ULONG( minMemType42 ),
|
|
FT_FRAME_ULONG( maxMemType42 ),
|
|
FT_FRAME_ULONG( minMemType1 ),
|
|
FT_FRAME_ULONG( maxMemType1 ),
|
|
FT_FRAME_END
|
|
};
|
|
|
|
|
|
error = face->goto_table( face, TTAG_post, stream, 0 );
|
|
if ( error )
|
|
return error;
|
|
|
|
if ( FT_STREAM_READ_FIELDS( post_fields, post ) )
|
|
return error;
|
|
|
|
/* we don't load the glyph names, we do that in another */
|
|
/* module (ttpost). */
|
|
|
|
FT_TRACE3(( "FormatType: 0x%x\n", post->FormatType ));
|
|
FT_TRACE3(( "isFixedPitch: %s\n", post->isFixedPitch
|
|
? " yes" : " no" ));
|
|
|
|
return SFNT_Err_Ok;
|
|
}
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* tt_face_load_pclt */
|
|
/* */
|
|
/* <Description> */
|
|
/* Loads the PCL 5 Table. */
|
|
/* */
|
|
/* <Input> */
|
|
/* face :: A handle to the target face object. */
|
|
/* */
|
|
/* stream :: A handle to the input stream. */
|
|
/* */
|
|
/* <Return> */
|
|
/* FreeType error code. 0 means success. */
|
|
/* */
|
|
FT_LOCAL_DEF( FT_Error )
|
|
tt_face_load_pclt( TT_Face face,
|
|
FT_Stream stream )
|
|
{
|
|
static const FT_Frame_Field pclt_fields[] =
|
|
{
|
|
#undef FT_STRUCTURE
|
|
#define FT_STRUCTURE TT_PCLT
|
|
|
|
FT_FRAME_START( 54 ),
|
|
FT_FRAME_ULONG ( Version ),
|
|
FT_FRAME_ULONG ( FontNumber ),
|
|
FT_FRAME_USHORT( Pitch ),
|
|
FT_FRAME_USHORT( xHeight ),
|
|
FT_FRAME_USHORT( Style ),
|
|
FT_FRAME_USHORT( TypeFamily ),
|
|
FT_FRAME_USHORT( CapHeight ),
|
|
FT_FRAME_BYTES ( TypeFace, 16 ),
|
|
FT_FRAME_BYTES ( CharacterComplement, 8 ),
|
|
FT_FRAME_BYTES ( FileName, 6 ),
|
|
FT_FRAME_CHAR ( StrokeWeight ),
|
|
FT_FRAME_CHAR ( WidthType ),
|
|
FT_FRAME_BYTE ( SerifStyle ),
|
|
FT_FRAME_BYTE ( Reserved ),
|
|
FT_FRAME_END
|
|
};
|
|
|
|
FT_Error error;
|
|
TT_PCLT* pclt = &face->pclt;
|
|
|
|
|
|
/* optional table */
|
|
error = face->goto_table( face, TTAG_PCLT, stream, 0 );
|
|
if ( error )
|
|
goto Exit;
|
|
|
|
if ( FT_STREAM_READ_FIELDS( pclt_fields, pclt ) )
|
|
goto Exit;
|
|
|
|
Exit:
|
|
return error;
|
|
}
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* tt_face_load_gasp */
|
|
/* */
|
|
/* <Description> */
|
|
/* Loads the `gasp' table into a face object. */
|
|
/* */
|
|
/* <Input> */
|
|
/* face :: A handle to the target face object. */
|
|
/* */
|
|
/* stream :: The input stream. */
|
|
/* */
|
|
/* <Return> */
|
|
/* FreeType error code. 0 means success. */
|
|
/* */
|
|
FT_LOCAL_DEF( FT_Error )
|
|
tt_face_load_gasp( TT_Face face,
|
|
FT_Stream stream )
|
|
{
|
|
FT_Error error;
|
|
FT_Memory memory = stream->memory;
|
|
|
|
FT_UInt j,num_ranges;
|
|
TT_GaspRange gaspranges;
|
|
|
|
|
|
/* the gasp table is optional */
|
|
error = face->goto_table( face, TTAG_gasp, stream, 0 );
|
|
if ( error )
|
|
goto Exit;
|
|
|
|
if ( FT_FRAME_ENTER( 4L ) )
|
|
goto Exit;
|
|
|
|
face->gasp.version = FT_GET_USHORT();
|
|
face->gasp.numRanges = FT_GET_USHORT();
|
|
|
|
FT_FRAME_EXIT();
|
|
|
|
/* only support versions 0 and 1 of the table */
|
|
if ( face->gasp.version >= 2 )
|
|
{
|
|
face->gasp.numRanges = 0;
|
|
error = SFNT_Err_Invalid_Table;
|
|
goto Exit;
|
|
}
|
|
|
|
num_ranges = face->gasp.numRanges;
|
|
FT_TRACE3(( "numRanges: %u\n", num_ranges ));
|
|
|
|
if ( FT_QNEW_ARRAY( gaspranges, num_ranges ) ||
|
|
FT_FRAME_ENTER( num_ranges * 4L ) )
|
|
goto Exit;
|
|
|
|
face->gasp.gaspRanges = gaspranges;
|
|
|
|
for ( j = 0; j < num_ranges; j++ )
|
|
{
|
|
gaspranges[j].maxPPEM = FT_GET_USHORT();
|
|
gaspranges[j].gaspFlag = FT_GET_USHORT();
|
|
|
|
FT_TRACE3(( "gaspRange %d: rangeMaxPPEM %5d, rangeGaspBehavior 0x%x\n",
|
|
j,
|
|
gaspranges[j].maxPPEM,
|
|
gaspranges[j].gaspFlag ));
|
|
}
|
|
|
|
FT_FRAME_EXIT();
|
|
|
|
Exit:
|
|
return error;
|
|
}
|
|
|
|
|
|
/* END */
|