diff options
Diffstat (limited to 'src/sfnt/sfobjs.c')
| -rw-r--r-- | src/sfnt/sfobjs.c | 1116 |
1 files changed, 0 insertions, 1116 deletions
diff --git a/src/sfnt/sfobjs.c b/src/sfnt/sfobjs.c deleted file mode 100644 index c25b87d..0000000 --- a/src/sfnt/sfobjs.c +++ /dev/null @@ -1,1116 +0,0 @@ -/***************************************************************************/ -/* */ -/* sfobjs.c */ -/* */ -/* SFNT object management (base). */ -/* */ -/* Copyright 1996-2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 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 "sfobjs.h" -#include "ttload.h" -#include "ttcmap.h" -#include "ttkern.h" -#include FT_INTERNAL_SFNT_H -#include FT_INTERNAL_DEBUG_H -#include FT_TRUETYPE_IDS_H -#include FT_TRUETYPE_TAGS_H -#include FT_SERVICE_POSTSCRIPT_CMAPS_H -#include "sferrors.h" - -#ifdef TT_CONFIG_OPTION_BDF -#include "ttbdf.h" -#endif - - - /*************************************************************************/ - /* */ - /* The macro FT_COMPONENT is used in trace mode. It is an implicit */ - /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */ - /* messages during execution. */ - /* */ -#undef FT_COMPONENT -#define FT_COMPONENT trace_sfobjs - - - - /* convert a UTF-16 name entry to ASCII */ - static FT_String* - tt_name_entry_ascii_from_utf16( TT_NameEntry entry, - FT_Memory memory ) - { - FT_String* string; - FT_UInt len, code, n; - FT_Byte* read = (FT_Byte*)entry->string; - FT_Error error; - - - len = (FT_UInt)entry->stringLength / 2; - - if ( FT_NEW_ARRAY( string, len + 1 ) ) - return NULL; - - for ( n = 0; n < len; n++ ) - { - code = FT_NEXT_USHORT( read ); - if ( code < 32 || code > 127 ) - code = '?'; - - string[n] = (char)code; - } - - string[len] = 0; - - return string; - } - - - /* convert an Apple Roman or symbol name entry to ASCII */ - static FT_String* - tt_name_entry_ascii_from_other( TT_NameEntry entry, - FT_Memory memory ) - { - FT_String* string; - FT_UInt len, code, n; - FT_Byte* read = (FT_Byte*)entry->string; - FT_Error error; - - - len = (FT_UInt)entry->stringLength; - - if ( FT_NEW_ARRAY( string, len + 1 ) ) - return NULL; - - for ( n = 0; n < len; n++ ) - { - code = *read++; - if ( code < 32 || code > 127 ) - code = '?'; - - string[n] = (char)code; - } - - string[len] = 0; - - return string; - } - - - typedef FT_String* (*TT_NameEntry_ConvertFunc)( TT_NameEntry entry, - FT_Memory memory ); - - - /*************************************************************************/ - /* */ - /* <Function> */ - /* tt_face_get_name */ - /* */ - /* <Description> */ - /* Returns a given ENGLISH name record in ASCII. */ - /* */ - /* <Input> */ - /* face :: A handle to the source face object. */ - /* */ - /* nameid :: The name id of the name record to return. */ - /* */ - /* <Return> */ - /* Character string. NULL if no name is present. */ - /* */ - static FT_String* - tt_face_get_name( TT_Face face, - FT_UShort nameid ) - { - FT_Memory memory = face->root.memory; - FT_String* result = NULL; - FT_UShort n; - TT_NameEntryRec* rec; - FT_Int found_apple = -1; - FT_Int found_apple_roman = -1; - FT_Int found_apple_english = -1; - FT_Int found_win = -1; - FT_Int found_unicode = -1; - - FT_Bool is_english = 0; - - TT_NameEntry_ConvertFunc convert; - - - rec = face->name_table.names; - for ( n = 0; n < face->num_names; n++, rec++ ) - { - /* According to the OpenType 1.3 specification, only Microsoft or */ - /* Apple platform IDs might be used in the `name' table. The */ - /* `Unicode' platform is reserved for the `cmap' table, and the */ - /* `Iso' one is deprecated. */ - /* */ - /* However, the Apple TrueType specification doesn't say the same */ - /* thing and goes to suggest that all Unicode `name' table entries */ - /* should be coded in UTF-16 (in big-endian format I suppose). */ - /* */ - if ( rec->nameID == nameid && rec->stringLength > 0 ) - { - switch ( rec->platformID ) - { - case TT_PLATFORM_APPLE_UNICODE: - case TT_PLATFORM_ISO: - /* there is `languageID' to check there. We should use this */ - /* field only as a last solution when nothing else is */ - /* available. */ - /* */ - found_unicode = n; - break; - - case TT_PLATFORM_MACINTOSH: - /* This is a bit special because some fonts will use either */ - /* an English language id, or a Roman encoding id, to indicate */ - /* the English version of its font name. */ - /* */ - if ( rec->languageID == TT_MAC_LANGID_ENGLISH ) - found_apple_english = n; - else if ( rec->encodingID == TT_MAC_ID_ROMAN ) - found_apple_roman = n; - break; - - case TT_PLATFORM_MICROSOFT: - /* we only take a non-English name when there is nothing */ - /* else available in the font */ - /* */ - if ( found_win == -1 || ( rec->languageID & 0x3FF ) == 0x009 ) - { - switch ( rec->encodingID ) - { - case TT_MS_ID_SYMBOL_CS: - case TT_MS_ID_UNICODE_CS: - case TT_MS_ID_UCS_4: - is_english = FT_BOOL( ( rec->languageID & 0x3FF ) == 0x009 ); - found_win = n; - break; - - default: - ; - } - } - break; - - default: - ; - } - } - } - - found_apple = found_apple_roman; - if ( found_apple_english >= 0 ) - found_apple = found_apple_english; - - /* some fonts contain invalid Unicode or Macintosh formatted entries; */ - /* we will thus favor names encoded in Windows formats if available */ - /* (provided it is an English name) */ - /* */ - convert = NULL; - if ( found_win >= 0 && !( found_apple >= 0 && !is_english ) ) - { - rec = face->name_table.names + found_win; - switch ( rec->encodingID ) - { - /* all Unicode strings are encoded using UTF-16BE */ - case TT_MS_ID_UNICODE_CS: - case TT_MS_ID_SYMBOL_CS: - convert = tt_name_entry_ascii_from_utf16; - break; - - case TT_MS_ID_UCS_4: - /* Apparently, if this value is found in a name table entry, it is */ - /* documented as `full Unicode repertoire'. Experience with the */ - /* MsGothic font shipped with Windows Vista shows that this really */ - /* means UTF-16 encoded names (UCS-4 values are only used within */ - /* charmaps). */ - convert = tt_name_entry_ascii_from_utf16; - break; - - default: - ; - } - } - else if ( found_apple >= 0 ) - { - rec = face->name_table.names + found_apple; - convert = tt_name_entry_ascii_from_other; - } - else if ( found_unicode >= 0 ) - { - rec = face->name_table.names + found_unicode; - convert = tt_name_entry_ascii_from_utf16; - } - - if ( rec && convert ) - { - if ( rec->string == NULL ) - { - FT_Error error = SFNT_Err_Ok; - FT_Stream stream = face->name_table.stream; - - FT_UNUSED( error ); - - - if ( FT_QNEW_ARRAY ( rec->string, rec->stringLength ) || - FT_STREAM_SEEK( rec->stringOffset ) || - FT_STREAM_READ( rec->string, rec->stringLength ) ) - { - FT_FREE( rec->string ); - rec->stringLength = 0; - result = NULL; - goto Exit; - } - } - - result = convert( rec, memory ); - } - - Exit: - return result; - } - - - static FT_Encoding - sfnt_find_encoding( int platform_id, - int encoding_id ) - { - typedef struct TEncoding_ - { - int platform_id; - int encoding_id; - FT_Encoding encoding; - - } TEncoding; - - static - const TEncoding tt_encodings[] = - { - { TT_PLATFORM_ISO, -1, FT_ENCODING_UNICODE }, - - { TT_PLATFORM_APPLE_UNICODE, -1, FT_ENCODING_UNICODE }, - - { TT_PLATFORM_MACINTOSH, TT_MAC_ID_ROMAN, FT_ENCODING_APPLE_ROMAN }, - - { TT_PLATFORM_MICROSOFT, TT_MS_ID_SYMBOL_CS, FT_ENCODING_MS_SYMBOL }, - { TT_PLATFORM_MICROSOFT, TT_MS_ID_UCS_4, FT_ENCODING_UNICODE }, - { TT_PLATFORM_MICROSOFT, TT_MS_ID_UNICODE_CS, FT_ENCODING_UNICODE }, - { TT_PLATFORM_MICROSOFT, TT_MS_ID_SJIS, FT_ENCODING_SJIS }, - { TT_PLATFORM_MICROSOFT, TT_MS_ID_GB2312, FT_ENCODING_GB2312 }, - { TT_PLATFORM_MICROSOFT, TT_MS_ID_BIG_5, FT_ENCODING_BIG5 }, - { TT_PLATFORM_MICROSOFT, TT_MS_ID_WANSUNG, FT_ENCODING_WANSUNG }, - { TT_PLATFORM_MICROSOFT, TT_MS_ID_JOHAB, FT_ENCODING_JOHAB } - }; - - const TEncoding *cur, *limit; - - - cur = tt_encodings; - limit = cur + sizeof ( tt_encodings ) / sizeof ( tt_encodings[0] ); - - for ( ; cur < limit; cur++ ) - { - if ( cur->platform_id == platform_id ) - { - if ( cur->encoding_id == encoding_id || - cur->encoding_id == -1 ) - return cur->encoding; - } - } - - return FT_ENCODING_NONE; - } - - - /* Fill in face->ttc_header. If the font is not a TTC, it is */ - /* synthesized into a TTC with one offset table. */ - static FT_Error - sfnt_open_font( FT_Stream stream, - TT_Face face ) - { - FT_Memory memory = stream->memory; - FT_Error error; - FT_ULong tag, offset; - - static const FT_Frame_Field ttc_header_fields[] = - { -#undef FT_STRUCTURE -#define FT_STRUCTURE TTC_HeaderRec - - FT_FRAME_START( 8 ), - FT_FRAME_LONG( version ), - FT_FRAME_LONG( count ), - FT_FRAME_END - }; - - - face->ttc_header.tag = 0; - face->ttc_header.version = 0; - face->ttc_header.count = 0; - - offset = FT_STREAM_POS(); - - if ( FT_READ_ULONG( tag ) ) - return error; - - if ( tag != 0x00010000UL && - tag != TTAG_ttcf && - tag != FT_MAKE_TAG( 'O', 'T', 'T', 'O' ) && - tag != TTAG_true && - tag != 0x00020000UL ) - return SFNT_Err_Unknown_File_Format; - - face->ttc_header.tag = TTAG_ttcf; - - if ( tag == TTAG_ttcf ) - { - FT_Int n; - - - FT_TRACE3(( "sfnt_open_font: file is a collection\n" )); - - if ( FT_STREAM_READ_FIELDS( ttc_header_fields, &face->ttc_header ) ) - return error; - - /* now read the offsets of each font in the file */ - if ( FT_NEW_ARRAY( face->ttc_header.offsets, face->ttc_header.count ) ) - return error; - - if ( FT_FRAME_ENTER( face->ttc_header.count * 4L ) ) - return error; - - for ( n = 0; n < face->ttc_header.count; n++ ) - face->ttc_header.offsets[n] = FT_GET_ULONG(); - - FT_FRAME_EXIT(); - } - else - { - FT_TRACE3(( "sfnt_open_font: synthesize TTC\n" )); - - face->ttc_header.version = 1 << 16; - face->ttc_header.count = 1; - - if ( FT_NEW( face->ttc_header.offsets) ) - return error; - - face->ttc_header.offsets[0] = offset; - } - - return error; - } - - - FT_LOCAL_DEF( FT_Error ) - sfnt_init_face( FT_Stream stream, - TT_Face face, - FT_Int face_index, - FT_Int num_params, - FT_Parameter* params ) - { - FT_Error error; - FT_Library library = face->root.driver->root.library; - SFNT_Service sfnt; - - - /* for now, parameters are unused */ - FT_UNUSED( num_params ); - FT_UNUSED( params ); - - - sfnt = (SFNT_Service)face->sfnt; - if ( !sfnt ) - { - sfnt = (SFNT_Service)FT_Get_Module_Interface( library, "sfnt" ); - if ( !sfnt ) - return SFNT_Err_Invalid_File_Format; - - face->sfnt = sfnt; - face->goto_table = sfnt->goto_table; - } - - FT_FACE_FIND_GLOBAL_SERVICE( face, face->psnames, POSTSCRIPT_CMAPS ); - - error = sfnt_open_font( stream, face ); - if ( error ) - return error; - - FT_TRACE2(( "sfnt_init_face: %08p, %ld\n", face, face_index )); - - if ( face_index < 0 ) - face_index = 0; - - if ( face_index >= face->ttc_header.count ) - return SFNT_Err_Bad_Argument; - - if ( FT_STREAM_SEEK( face->ttc_header.offsets[face_index] ) ) - return error; - - /* check that we have a valid TrueType file */ - error = sfnt->load_font_dir( face, stream ); - if ( error ) - return error; - - face->root.num_faces = face->ttc_header.count; - - return error; - } - - -#define LOAD_( x ) \ - do { \ - FT_TRACE2(( "`" #x "' " )); \ - FT_TRACE3(( "-->\n" )); \ - \ - error = sfnt->load_##x( face, stream ); \ - \ - FT_TRACE2(( "%s\n", ( !error ) \ - ? "loaded" \ - : ( error == SFNT_Err_Table_Missing ) \ - ? "missing" \ - : "failed to load" )); \ - FT_TRACE3(( "\n" )); \ - } while ( 0 ) - -#define LOADM_( x, vertical ) \ - do { \ - FT_TRACE2(( "`%s" #x "' ", \ - vertical ? "vertical " : "" )); \ - FT_TRACE3(( "-->\n" )); \ - \ - error = sfnt->load_##x( face, stream, vertical ); \ - \ - FT_TRACE2(( "%s\n", ( !error ) \ - ? "loaded" \ - : ( error == SFNT_Err_Table_Missing ) \ - ? "missing" \ - : "failed to load" )); \ - FT_TRACE3(( "\n" )); \ - } while ( 0 ) - - - FT_LOCAL_DEF( FT_Error ) - sfnt_load_face( FT_Stream stream, - TT_Face face, - FT_Int face_index, - FT_Int num_params, - FT_Parameter* params ) - { - FT_Error error, psnames_error; - FT_Bool has_outline; - FT_Bool is_apple_sbit; - - SFNT_Service sfnt = (SFNT_Service)face->sfnt; - - FT_UNUSED( face_index ); - FT_UNUSED( num_params ); - FT_UNUSED( params ); - - - /* Load tables */ - - /* We now support two SFNT-based bitmapped font formats. They */ - /* are recognized easily as they do not include a `glyf' */ - /* table. */ - /* */ - /* The first format comes from Apple, and uses a table named */ - /* `bhed' instead of `head' to store the font header (using */ - /* the same format). It also doesn't include horizontal and */ - /* vertical metrics tables (i.e. `hhea' and `vhea' tables are */ - /* missing). */ - /* */ - /* The other format comes from Microsoft, and is used with */ - /* WinCE/PocketPC. It looks like a standard TTF, except that */ - /* it doesn't contain outlines. */ - /* */ - - FT_TRACE2(( "sfnt_load_face: %08p\n\n", face )); - - /* do we have outlines in there? */ -#ifdef FT_CONFIG_OPTION_INCREMENTAL - has_outline = FT_BOOL( face->root.internal->incremental_interface != 0 || - tt_face_lookup_table( face, TTAG_glyf ) != 0 || - tt_face_lookup_table( face, TTAG_CFF ) != 0 ); -#else - has_outline = FT_BOOL( tt_face_lookup_table( face, TTAG_glyf ) != 0 || - tt_face_lookup_table( face, TTAG_CFF ) != 0 ); -#endif - - is_apple_sbit = 0; - - /* if this font doesn't contain outlines, we try to load */ - /* a `bhed' table */ - if ( !has_outline && sfnt->load_bhed ) - { - LOAD_( bhed ); - is_apple_sbit = FT_BOOL( !error ); - } - - /* load the font header (`head' table) if this isn't an Apple */ - /* sbit font file */ - if ( !is_apple_sbit ) - { - LOAD_( head ); - if ( error ) - goto Exit; - } - - if ( face->header.Units_Per_EM == 0 ) - { - error = SFNT_Err_Invalid_Table; - - goto Exit; - } - - /* the following tables are often not present in embedded TrueType */ - /* fonts within PDF documents, so don't check for them. */ - LOAD_( maxp ); - LOAD_( cmap ); - - /* the following tables are optional in PCL fonts -- */ - /* don't check for errors */ - LOAD_( name ); - LOAD_( post ); - psnames_error = error; - - /* do not load the metrics headers and tables if this is an Apple */ - /* sbit font file */ - if ( !is_apple_sbit ) - { - /* load the `hhea' and `hmtx' tables */ - LOADM_( hhea, 0 ); - if ( !error ) - { - LOADM_( hmtx, 0 ); - if ( error == SFNT_Err_Table_Missing ) - { - error = SFNT_Err_Hmtx_Table_Missing; - -#ifdef FT_CONFIG_OPTION_INCREMENTAL - /* If this is an incrementally loaded font and there are */ - /* overriding metrics, tolerate a missing `hmtx' table. */ - if ( face->root.internal->incremental_interface && - face->root.internal->incremental_interface->funcs-> - get_glyph_metrics ) - { - face->horizontal.number_Of_HMetrics = 0; - error = SFNT_Err_Ok; - } -#endif - } - } - else if ( error == SFNT_Err_Table_Missing ) - { - /* No `hhea' table necessary for SFNT Mac fonts. */ - if ( face->format_tag == TTAG_true ) - { - FT_TRACE2(( "This is an SFNT Mac font.\n" )); - has_outline = 0; - error = SFNT_Err_Ok; - } - else - { - error = SFNT_Err_Horiz_Header_Missing; - -#ifdef FT_CONFIG_OPTION_INCREMENTAL - /* If this is an incrementally loaded font and there are */ - /* overriding metrics, tolerate a missing `hhea' table. */ - if ( face->root.internal->incremental_interface && - face->root.internal->incremental_interface->funcs-> - get_glyph_metrics ) - { - face->horizontal.number_Of_HMetrics = 0; - error = SFNT_Err_Ok; - } -#endif - - } - } - - if ( error ) - goto Exit; - - /* try to load the `vhea' and `vmtx' tables */ - LOADM_( hhea, 1 ); - if ( !error ) - { - LOADM_( hmtx, 1 ); - if ( !error ) - face->vertical_info = 1; - } - - if ( error && error != SFNT_Err_Table_Missing ) - goto Exit; - - LOAD_( os2 ); - if ( error ) - { - if ( error != SFNT_Err_Table_Missing ) - goto Exit; - - face->os2.version = 0xFFFFU; - } - - } - - /* the optional tables */ - - /* embedded bitmap support. */ - if ( sfnt->load_eblc ) - { - LOAD_( eblc ); - if ( error ) - { - /* return an error if this font file has no outlines */ - if ( error == SFNT_Err_Table_Missing && has_outline ) - error = SFNT_Err_Ok; - else - goto Exit; - } - } - - LOAD_( pclt ); - if ( error ) - { - if ( error != SFNT_Err_Table_Missing ) - goto Exit; - - face->pclt.Version = 0; - } - - /* consider the kerning and gasp tables as optional */ - LOAD_( gasp ); - LOAD_( kern ); - - error = SFNT_Err_Ok; - - face->root.num_glyphs = face->max_profile.numGlyphs; - -#if 0 - /* Bit 8 of the `fsSelection' field in the `OS/2' table denotes */ - /* a WWS-only font face. `WWS' stands for `weight', width', and */ - /* `slope', a term used by Microsoft's Windows Presentation */ - /* Foundation (WPF). This flag will be introduced in version */ - /* 1.5 of the OpenType specification (but is already in use). */ - - if ( face->os2.version != 0xFFFFU && face->os2.fsSelection & 256 ) -#endif - { - face->root.family_name = - tt_face_get_name( face, TT_NAME_ID_PREFERRED_FAMILY ); - if ( !face->root.family_name ) - face->root.family_name = - tt_face_get_name( face, TT_NAME_ID_FONT_FAMILY ); - - face->root.style_name = - tt_face_get_name( face, TT_NAME_ID_PREFERRED_SUBFAMILY ); - if ( !face->root.style_name ) - face->root.style_name = - tt_face_get_name( face, TT_NAME_ID_FONT_SUBFAMILY ); - } -#if 0 - else - { - /* Support for `name' table ID 21 (WWS family) and 22 (WWS */ - /* subfamily) is still under consideration by Microsoft and */ - /* not implemented in the current version of WPF. */ - - face->root.family_name = - tt_face_get_name( face, TT_NAME_ID_WWS_FAMILY ); - if ( !face->root.family_name ) - face->root.family_name = - tt_face_get_name( face, TT_NAME_ID_PREFERRED_FAMILY ); - if ( !face->root.family_name ) - face->root.family_name = - tt_face_get_name( face, TT_NAME_ID_FONT_FAMILY ); - - face->root.style_name = - tt_face_get_name( face, TT_NAME_ID_WWS_SUBFAMILY ); - if ( !face->root.style_name ) - face->root.style_name = - tt_face_get_name( face, TT_NAME_ID_PREFERRED_SUBFAMILY ); - if ( !face->root.style_name ) - face->root.style_name = - tt_face_get_name( face, TT_NAME_ID_FONT_SUBFAMILY ); - } -#endif - - - /* now set up root fields */ - { - FT_Face root = &face->root; - FT_Int32 flags = root->face_flags; - - - /*********************************************************************/ - /* */ - /* Compute face flags. */ - /* */ - if ( has_outline == TRUE ) - flags |= FT_FACE_FLAG_SCALABLE; /* scalable outlines */ - - /* The sfnt driver only supports bitmap fonts natively, thus we */ - /* don't set FT_FACE_FLAG_HINTER. */ - flags |= FT_FACE_FLAG_SFNT | /* SFNT file format */ - FT_FACE_FLAG_HORIZONTAL; /* horizontal data */ - -#ifdef TT_CONFIG_OPTION_POSTSCRIPT_NAMES - if ( psnames_error == SFNT_Err_Ok && - face->postscript.FormatType != 0x00030000L ) - flags |= FT_FACE_FLAG_GLYPH_NAMES; -#endif - - /* fixed width font? */ - if ( face->postscript.isFixedPitch ) - flags |= FT_FACE_FLAG_FIXED_WIDTH; - - /* vertical information? */ - if ( face->vertical_info ) - flags |= FT_FACE_FLAG_VERTICAL; - - /* kerning available ? */ - if ( TT_FACE_HAS_KERNING( face ) ) - flags |= FT_FACE_FLAG_KERNING; - -#ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT - /* Don't bother to load the tables unless somebody asks for them. */ - /* No need to do work which will (probably) not be used. */ - if ( tt_face_lookup_table( face, TTAG_glyf ) != 0 && - tt_face_lookup_table( face, TTAG_fvar ) != 0 && - tt_face_lookup_table( face, TTAG_gvar ) != 0 ) - flags |= FT_FACE_FLAG_MULTIPLE_MASTERS; -#endif - - root->face_flags = flags; - - /*********************************************************************/ - /* */ - /* Compute style flags. */ - /* */ - - flags = 0; - if ( has_outline == TRUE && face->os2.version != 0xFFFFU ) - { - /* We have an OS/2 table; use the `fsSelection' field. Bit 9 */ - /* indicates an oblique font face. This flag will be */ - /* introduced in version 1.5 of the OpenType specification (but */ - /* is already in use). */ - - if ( face->os2.fsSelection & 512 ) /* bit 9 */ - flags |= FT_STYLE_FLAG_ITALIC; - else if ( face->os2.fsSelection & 1 ) /* bit 0 */ - flags |= FT_STYLE_FLAG_ITALIC; - - if ( face->os2.fsSelection & 32 ) /* bit 5 */ - flags |= FT_STYLE_FLAG_BOLD; - } - else - { - /* this is an old Mac font, use the header field */ - if ( face->header.Mac_Style & 1 ) - flags |= FT_STYLE_FLAG_BOLD; - - if ( face->header.Mac_Style & 2 ) - flags |= FT_STYLE_FLAG_ITALIC; - } - - root->style_flags = flags; - - /*********************************************************************/ - /* */ - /* Polish the charmaps. */ - /* */ - /* Try to set the charmap encoding according to the platform & */ - /* encoding ID of each charmap. */ - /* */ - - tt_face_build_cmaps( face ); /* ignore errors */ - - - /* set the encoding fields */ - { - FT_Int m; - - - for ( m = 0; m < root->num_charmaps; m++ ) - { - FT_CharMap charmap = root->charmaps[m]; - - - charmap->encoding = sfnt_find_encoding( charmap->platform_id, - charmap->encoding_id ); - -#if 0 - if ( root->charmap == NULL && - charmap->encoding == FT_ENCODING_UNICODE ) - { - /* set 'root->charmap' to the first Unicode encoding we find */ - root->charmap = charmap; - } -#endif - } - } - - - /*********************************************************************/ - /* */ - /* Set up metrics. */ - /* */ - if ( has_outline == TRUE ) - { - /* XXX What about if outline header is missing */ - /* (e.g. sfnt wrapped bitmap)? */ - root->bbox.xMin = face->header.xMin; - root->bbox.yMin = face->header.yMin; - root->bbox.xMax = face->header.xMax; - root->bbox.yMax = face->header.yMax; - root->units_per_EM = face->header.Units_Per_EM; - - - /* XXX: Computing the ascender/descender/height is very different */ - /* from what the specification tells you. Apparently, we */ - /* must be careful because */ - /* */ - /* - not all fonts have an OS/2 table; in this case, we take */ - /* the values in the horizontal header. However, these */ - /* values very often are not reliable. */ - /* */ - /* - otherwise, the correct typographic values are in the */ - /* sTypoAscender, sTypoDescender & sTypoLineGap fields. */ - /* */ - /* However, certain fonts have these fields set to 0. */ - /* Rather, they have usWinAscent & usWinDescent correctly */ - /* set (but with different values). */ - /* */ - /* As an example, Arial Narrow is implemented through four */ - /* files ARIALN.TTF, ARIALNI.TTF, ARIALNB.TTF & ARIALNBI.TTF */ - /* */ - /* Strangely, all fonts have the same values in their */ - /* sTypoXXX fields, except ARIALNB which sets them to 0. */ - /* */ - /* On the other hand, they all have different */ - /* usWinAscent/Descent values -- as a conclusion, the OS/2 */ - /* table cannot be used to compute the text height reliably! */ - /* */ - - /* The ascender/descender/height are computed from the OS/2 table */ - /* when found. Otherwise, they're taken from the horizontal */ - /* header. */ - /* */ - - root->ascender = face->horizontal.Ascender; - root->descender = face->horizontal.Descender; - - root->height = (FT_Short)( root->ascender - root->descender + - face->horizontal.Line_Gap ); - -#if 0 - /* if the line_gap is 0, we add an extra 15% to the text height -- */ - /* this computation is based on various versions of Times New Roman */ - if ( face->horizontal.Line_Gap == 0 ) - root->height = (FT_Short)( ( root->height * 115 + 50 ) / 100 ); -#endif - -#if 0 - - /* some fonts have the OS/2 "sTypoAscender", "sTypoDescender" & */ - /* "sTypoLineGap" fields set to 0, like ARIALNB.TTF */ - if ( face->os2.version != 0xFFFFU && root->ascender ) - { - FT_Int height; - - - root->ascender = face->os2.sTypoAscender; - root->descender = -face->os2.sTypoDescender; - - height = root->ascender + root->descender + face->os2.sTypoLineGap; - if ( height > root->height ) - root->height = height; - } - -#endif /* 0 */ - - root->max_advance_width = face->horizontal.advance_Width_Max; - - root->max_advance_height = (FT_Short)( face->vertical_info - ? face->vertical.advance_Height_Max - : root->height ); - - root->underline_position = face->postscript.underlinePosition; - root->underline_thickness = face->postscript.underlineThickness; - } - -#ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS - - /* - * Now allocate the root array of FT_Bitmap_Size records and - * populate them. Unfortunately, it isn't possible to indicate bit - * depths in the FT_Bitmap_Size record. This is a design error. - */ - { - FT_UInt i, count; - - -#if !defined FT_CONFIG_OPTION_OLD_INTERNALS - count = face->sbit_num_strikes; -#else - count = (FT_UInt)face->num_sbit_strikes; -#endif - - if ( count > 0 ) - { - FT_Memory memory = face->root.stream->memory; - FT_UShort em_size = face->header.Units_Per_EM; - FT_Short avgwidth = face->os2.xAvgCharWidth; - FT_Size_Metrics metrics; - - - if ( em_size == 0 || face->os2.version == 0xFFFFU ) - { - avgwidth = 0; - em_size = 1; - } - - if ( FT_NEW_ARRAY( root->available_sizes, count ) ) - goto Exit; - - for ( i = 0; i < count; i++ ) - { - FT_Bitmap_Size* bsize = root->available_sizes + i; - - - error = sfnt->load_strike_metrics( face, i, &metrics ); - if ( error ) - goto Exit; - - bsize->height = (FT_Short)( metrics.height >> 6 ); - bsize->width = (FT_Short)( - ( avgwidth * metrics.x_ppem + em_size / 2 ) / em_size ); - - bsize->x_ppem = metrics.x_ppem << 6; - bsize->y_ppem = metrics.y_ppem << 6; - - /* assume 72dpi */ - bsize->size = metrics.y_ppem << 6; - } - - root->face_flags |= FT_FACE_FLAG_FIXED_SIZES; - root->num_fixed_sizes = (FT_Int)count; - } - } - -#endif /* TT_CONFIG_OPTION_EMBEDDED_BITMAPS */ - - } - - Exit: - FT_TRACE2(( "sfnt_load_face: done\n" )); - - return error; - } - - -#undef LOAD_ -#undef LOADM_ - - - FT_LOCAL_DEF( void ) - sfnt_done_face( TT_Face face ) - { - FT_Memory memory = face->root.memory; - SFNT_Service sfnt = (SFNT_Service)face->sfnt; - - - if ( sfnt ) - { - /* destroy the postscript names table if it is loaded */ - if ( sfnt->free_psnames ) - sfnt->free_psnames( face ); - - /* destroy the embedded bitmaps table if it is loaded */ - if ( sfnt->free_eblc ) - sfnt->free_eblc( face ); - } - -#ifdef TT_CONFIG_OPTION_BDF - /* freeing the embedded BDF properties */ - tt_face_free_bdf_props( face ); -#endif - - /* freeing the kerning table */ - tt_face_done_kern( face ); - - /* freeing the collection table */ - FT_FREE( face->ttc_header.offsets ); - face->ttc_header.count = 0; - - /* freeing table directory */ - FT_FREE( face->dir_tables ); - face->num_tables = 0; - - { - FT_Stream stream = FT_FACE_STREAM( face ); - - - /* simply release the 'cmap' table frame */ - FT_FRAME_RELEASE( face->cmap_table ); - face->cmap_size = 0; - } - - /* freeing the horizontal metrics */ -#if !defined FT_CONFIG_OPTION_OLD_INTERNALS - { - FT_Stream stream = FT_FACE_STREAM( face ); - - - FT_FRAME_RELEASE( face->horz_metrics ); - FT_FRAME_RELEASE( face->vert_metrics ); - face->horz_metrics_size = 0; - face->vert_metrics_size = 0; - } -#else - FT_FREE( face->horizontal.long_metrics ); - FT_FREE( face->horizontal.short_metrics ); -#endif - - /* freeing the vertical ones, if any */ - if ( face->vertical_info ) - { - FT_FREE( face->vertical.long_metrics ); - FT_FREE( face->vertical.short_metrics ); - face->vertical_info = 0; - } - - /* freeing the gasp table */ - FT_FREE( face->gasp.gaspRanges ); - face->gasp.numRanges = 0; - - /* freeing the name table */ - if ( sfnt ) - sfnt->free_name( face ); - - /* freeing family and style name */ - FT_FREE( face->root.family_name ); - FT_FREE( face->root.style_name ); - - /* freeing sbit size table */ - FT_FREE( face->root.available_sizes ); - face->root.num_fixed_sizes = 0; - - FT_FREE( face->postscript_name ); - - face->sfnt = 0; - } - - -/* END */ |