--- a/misc/libfreetype/src/sfnt/ttload.c Thu Jul 25 23:16:06 2013 +0200
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,1267 +0,0 @@
-/***************************************************************************/
-/* */
-/* ttload.c */
-/* */
-/* Load the basic TrueType tables, i.e., tables that can be either in */
-/* TTF or OTF fonts (body). */
-/* */
-/* Copyright 1996-2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, */
-/* 2010 by */
-/* David Turner, Robert Wilhelm, and Werner Lemberg. */
-/* */
-/* This file is part of the FreeType project, and may only be used, */
-/* modified, and distributed under the terms of the FreeType project */
-/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
-/* this file you indicate that you have read the license and */
-/* understand and accept it fully. */
-/* */
-/***************************************************************************/
-
-
-#include <ft2build.h>
-#include FT_INTERNAL_DEBUG_H
-#include FT_INTERNAL_STREAM_H
-#include FT_TRUETYPE_TAGS_H
-#include "ttload.h"
-
-#include "sferrors.h"
-
-
- /*************************************************************************/
- /* */
- /* The macro FT_COMPONENT is used in trace mode. It is an implicit */
- /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */
- /* messages during execution. */
- /* */
-#undef FT_COMPONENT
-#define FT_COMPONENT trace_ttload
-
-
- /*************************************************************************/
- /* */
- /* <Function> */
- /* tt_face_lookup_table */
- /* */
- /* <Description> */
- /* Looks for a TrueType table by name. */
- /* */
- /* <Input> */
- /* face :: A face object handle. */
- /* */
- /* tag :: The searched tag. */
- /* */
- /* <Return> */
- /* A pointer to the table directory entry. 0 if not found. */
- /* */
- FT_LOCAL_DEF( TT_Table )
- tt_face_lookup_table( TT_Face face,
- FT_ULong tag )
- {
- TT_Table entry;
- TT_Table limit;
-#ifdef FT_DEBUG_LEVEL_TRACE
- FT_Bool zero_length = FALSE;
-#endif
-
-
- FT_TRACE4(( "tt_face_lookup_table: %08p, `%c%c%c%c' -- ",
- face,
- (FT_Char)( tag >> 24 ),
- (FT_Char)( tag >> 16 ),
- (FT_Char)( tag >> 8 ),
- (FT_Char)( tag ) ));
-
- entry = face->dir_tables;
- limit = entry + face->num_tables;
-
- for ( ; entry < limit; entry++ )
- {
- /* For compatibility with Windows, we consider */
- /* zero-length tables the same as missing tables. */
- if ( entry->Tag == tag )
- {
- if ( entry->Length != 0 )
- {
- FT_TRACE4(( "found table.\n" ));
- return entry;
- }
-#ifdef FT_DEBUG_LEVEL_TRACE
- zero_length = TRUE;
-#endif
- }
- }
-
-#ifdef FT_DEBUG_LEVEL_TRACE
- if ( zero_length )
- FT_TRACE4(( "ignoring empty table\n" ));
- else
- FT_TRACE4(( "could not find table\n" ));
-#endif
-
- return NULL;
- }
-
-
- /*************************************************************************/
- /* */
- /* <Function> */
- /* tt_face_goto_table */
- /* */
- /* <Description> */
- /* Looks for a TrueType table by name, then seek a stream to it. */
- /* */
- /* <Input> */
- /* face :: A face object handle. */
- /* */
- /* tag :: The searched tag. */
- /* */
- /* stream :: The stream to seek when the table is found. */
- /* */
- /* <Output> */
- /* length :: The length of the table if found, undefined otherwise. */
- /* */
- /* <Return> */
- /* FreeType error code. 0 means success. */
- /* */
- FT_LOCAL_DEF( FT_Error )
- tt_face_goto_table( TT_Face face,
- FT_ULong tag,
- FT_Stream stream,
- FT_ULong* length )
- {
- TT_Table table;
- FT_Error error;
-
-
- table = tt_face_lookup_table( face, tag );
- if ( table )
- {
- if ( length )
- *length = table->Length;
-
- if ( FT_STREAM_SEEK( table->Offset ) )
- goto Exit;
- }
- else
- error = SFNT_Err_Table_Missing;
-
- Exit:
- return error;
- }
-
-
- /* Here, we */
- /* */
- /* - check that `num_tables' is valid (and adjust it if necessary) */
- /* */
- /* - look for a `head' table, check its size, and parse it to check */
- /* whether its `magic' field is correctly set */
- /* */
- /* - errors (except errors returned by stream handling) */
- /* */
- /* SFNT_Err_Unknown_File_Format: */
- /* no table is defined in directory, it is not sfnt-wrapped */
- /* data */
- /* SFNT_Err_Table_Missing: */
- /* table directory is valid, but essential tables */
- /* (head/bhed/SING) are missing */
- /* */
- static FT_Error
- check_table_dir( SFNT_Header sfnt,
- FT_Stream stream )
- {
- FT_Error error;
- FT_UShort nn, valid_entries = 0;
- FT_UInt has_head = 0, has_sing = 0, has_meta = 0;
- FT_ULong offset = sfnt->offset + 12;
-
- static const FT_Frame_Field table_dir_entry_fields[] =
- {
-#undef FT_STRUCTURE
-#define FT_STRUCTURE TT_TableRec
-
- FT_FRAME_START( 16 ),
- FT_FRAME_ULONG( Tag ),
- FT_FRAME_ULONG( CheckSum ),
- FT_FRAME_ULONG( Offset ),
- FT_FRAME_ULONG( Length ),
- FT_FRAME_END
- };
-
-
- if ( FT_STREAM_SEEK( offset ) )
- goto Exit;
-
- for ( nn = 0; nn < sfnt->num_tables; nn++ )
- {
- TT_TableRec table;
-
-
- if ( FT_STREAM_READ_FIELDS( table_dir_entry_fields, &table ) )
- {
- nn--;
- FT_TRACE2(( "check_table_dir:"
- " can read only %d table%s in font (instead of %d)\n",
- nn, nn == 1 ? "" : "s", sfnt->num_tables ));
- sfnt->num_tables = nn;
- break;
- }
-
- /* we ignore invalid tables */
- if ( table.Offset + table.Length > stream->size )
- {
- FT_TRACE2(( "check_table_dir: table entry %d invalid\n", nn ));
- continue;
- }
- else
- valid_entries++;
-
- if ( table.Tag == TTAG_head || table.Tag == TTAG_bhed )
- {
- FT_UInt32 magic;
-
-
-#ifndef TT_CONFIG_OPTION_EMBEDDED_BITMAPS
- if ( table.Tag == TTAG_head )
-#endif
- has_head = 1;
-
- /*
- * The table length should be 0x36, but certain font tools make it
- * 0x38, so we will just check that it is greater.
- *
- * Note that according to the specification, the table must be
- * padded to 32-bit lengths, but this doesn't apply to the value of
- * its `Length' field!
- *
- */
- if ( table.Length < 0x36 )
- {
- FT_TRACE2(( "check_table_dir: `head' table too small\n" ));
- error = SFNT_Err_Table_Missing;
- goto Exit;
- }
-
- if ( FT_STREAM_SEEK( table.Offset + 12 ) ||
- FT_READ_ULONG( magic ) )
- goto Exit;
-
- if ( magic != 0x5F0F3CF5UL )
- {
- FT_TRACE2(( "check_table_dir:"
- " no magic number found in `head' table\n"));
- error = SFNT_Err_Table_Missing;
- goto Exit;
- }
-
- if ( FT_STREAM_SEEK( offset + ( nn + 1 ) * 16 ) )
- goto Exit;
- }
- else if ( table.Tag == TTAG_SING )
- has_sing = 1;
- else if ( table.Tag == TTAG_META )
- has_meta = 1;
- }
-
- sfnt->num_tables = valid_entries;
-
- if ( sfnt->num_tables == 0 )
- {
- FT_TRACE2(( "check_table_dir: no tables found\n" ));
- error = SFNT_Err_Unknown_File_Format;
- goto Exit;
- }
-
- /* if `sing' and `meta' tables are present, there is no `head' table */
- if ( has_head || ( has_sing && has_meta ) )
- {
- error = SFNT_Err_Ok;
- goto Exit;
- }
- else
- {
- FT_TRACE2(( "check_table_dir:" ));
-#ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS
- FT_TRACE2(( " neither `head', `bhed', nor `sing' table found\n" ));
-#else
- FT_TRACE2(( " neither `head' nor `sing' table found\n" ));
-#endif
- error = SFNT_Err_Table_Missing;
- }
-
- Exit:
- return error;
- }
-
-
- /*************************************************************************/
- /* */
- /* <Function> */
- /* tt_face_load_font_dir */
- /* */
- /* <Description> */
- /* Loads the header of a SFNT font file. */
- /* */
- /* <Input> */
- /* face :: A handle to the target face object. */
- /* */
- /* stream :: The input stream. */
- /* */
- /* <Output> */
- /* sfnt :: The SFNT header. */
- /* */
- /* <Return> */
- /* FreeType error code. 0 means success. */
- /* */
- /* <Note> */
- /* The stream cursor must be at the beginning of the font directory. */
- /* */
- FT_LOCAL_DEF( FT_Error )
- tt_face_load_font_dir( TT_Face face,
- FT_Stream stream )
- {
- SFNT_HeaderRec sfnt;
- FT_Error error;
- FT_Memory memory = stream->memory;
- TT_TableRec* entry;
- FT_Int nn;
-
- static const FT_Frame_Field offset_table_fields[] =
- {
-#undef FT_STRUCTURE
-#define FT_STRUCTURE SFNT_HeaderRec
-
- FT_FRAME_START( 8 ),
- FT_FRAME_USHORT( num_tables ),
- FT_FRAME_USHORT( search_range ),
- FT_FRAME_USHORT( entry_selector ),
- FT_FRAME_USHORT( range_shift ),
- FT_FRAME_END
- };
-
-
- FT_TRACE2(( "tt_face_load_font_dir: %08p\n", face ));
-
- /* read the offset table */
-
- sfnt.offset = FT_STREAM_POS();
-
- if ( FT_READ_ULONG( sfnt.format_tag ) ||
- FT_STREAM_READ_FIELDS( offset_table_fields, &sfnt ) )
- goto Exit;
-
- /* many fonts don't have these fields set correctly */
-#if 0
- if ( sfnt.search_range != 1 << ( sfnt.entry_selector + 4 ) ||
- sfnt.search_range + sfnt.range_shift != sfnt.num_tables << 4 )
- return SFNT_Err_Unknown_File_Format;
-#endif
-
- /* load the table directory */
-
- FT_TRACE2(( "-- Number of tables: %10u\n", sfnt.num_tables ));
- FT_TRACE2(( "-- Format version: 0x%08lx\n", sfnt.format_tag ));
-
- /* check first */
- error = check_table_dir( &sfnt, stream );
- if ( error )
- {
- FT_TRACE2(( "tt_face_load_font_dir:"
- " invalid table directory for TrueType\n" ));
-
- goto Exit;
- }
-
- face->num_tables = sfnt.num_tables;
- face->format_tag = sfnt.format_tag;
-
- if ( FT_QNEW_ARRAY( face->dir_tables, face->num_tables ) )
- goto Exit;
-
- if ( FT_STREAM_SEEK( sfnt.offset + 12 ) ||
- FT_FRAME_ENTER( face->num_tables * 16L ) )
- goto Exit;
-
- entry = face->dir_tables;
-
- FT_TRACE2(( "\n"
- " tag offset length checksum\n"
- " ----------------------------------\n" ));
-
- for ( nn = 0; nn < sfnt.num_tables; nn++ )
- {
- entry->Tag = FT_GET_TAG4();
- entry->CheckSum = FT_GET_ULONG();
- entry->Offset = FT_GET_LONG();
- entry->Length = FT_GET_LONG();
-
- /* ignore invalid tables */
- if ( entry->Offset + entry->Length > stream->size )
- continue;
- else
- {
- FT_TRACE2(( " %c%c%c%c %08lx %08lx %08lx\n",
- (FT_Char)( entry->Tag >> 24 ),
- (FT_Char)( entry->Tag >> 16 ),
- (FT_Char)( entry->Tag >> 8 ),
- (FT_Char)( entry->Tag ),
- entry->Offset,
- entry->Length,
- entry->CheckSum ));
- entry++;
- }
- }
-
- FT_FRAME_EXIT();
-
- FT_TRACE2(( "table directory loaded\n\n" ));
-
- Exit:
- return error;
- }
-
-
- /*************************************************************************/
- /* */
- /* <Function> */
- /* tt_face_load_any */
- /* */
- /* <Description> */
- /* Loads any font table into client memory. */
- /* */
- /* <Input> */
- /* face :: The face object to look for. */
- /* */
- /* tag :: The tag of table to load. Use the value 0 if you want */
- /* to access the whole font file, else set this parameter */
- /* to a valid TrueType table tag that you can forge with */
- /* the MAKE_TT_TAG macro. */
- /* */
- /* offset :: The starting offset in the table (or the file if */
- /* tag == 0). */
- /* */
- /* length :: The address of the decision variable: */
- /* */
- /* If length == NULL: */
- /* Loads the whole table. Returns an error if */
- /* `offset' == 0! */
- /* */
- /* If *length == 0: */
- /* Exits immediately; returning the length of the given */
- /* table or of the font file, depending on the value of */
- /* `tag'. */
- /* */
- /* If *length != 0: */
- /* Loads the next `length' bytes of table or font, */
- /* starting at offset `offset' (in table or font too). */
- /* */
- /* <Output> */
- /* buffer :: The address of target buffer. */
- /* */
- /* <Return> */
- /* FreeType error code. 0 means success. */
- /* */
- FT_LOCAL_DEF( FT_Error )
- tt_face_load_any( TT_Face face,
- FT_ULong tag,
- FT_Long offset,
- FT_Byte* buffer,
- FT_ULong* length )
- {
- FT_Error error;
- FT_Stream stream;
- TT_Table table;
- FT_ULong size;
-
-
- if ( tag != 0 )
- {
- /* look for tag in font directory */
- table = tt_face_lookup_table( face, tag );
- if ( !table )
- {
- error = SFNT_Err_Table_Missing;
- goto Exit;
- }
-
- offset += table->Offset;
- size = table->Length;
- }
- 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 value is smaller. */
-
- if ( maxProfile->maxFunctionDefs < 64 )
- maxProfile->maxFunctionDefs = 64;
-
- /* we add 4 phantom points later */
- if ( maxProfile->maxTwilightPoints > ( 0xFFFFU - 4 ) )
- {
- FT_TRACE0(( "tt_face_load_maxp:"
- " too much twilight points in `maxp' table;\n"
- " "
- " some glyphs might be rendered incorrectly\n" ));
-
- maxProfile->maxTwilightPoints = 0xFFFFU - 4;
- }
-
- /* we arbitrarily limit recursion to avoid stack exhaustion */
- if ( maxProfile->maxComponentDepth > 100 )
- {
- FT_TRACE0(( "tt_face_load_maxp:"
- " abnormally large component depth (%d) set to 100\n",
- maxProfile->maxComponentDepth ));
- maxProfile->maxComponentDepth = 100;
- }
- }
-
- 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(( "tt_face_load_name: 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 */