| /***************************************************************************/ |
| /* */ |
| /* cffobjs.c */ |
| /* */ |
| /* OpenType objects manager (body). */ |
| /* */ |
| /* Copyright 1996-2000 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_CALC_H |
| #include FT_INTERNAL_STREAM_H |
| #include FT_ERRORS_H |
| #include FT_TRUETYPE_IDS_H |
| #include FT_TRUETYPE_TAGS_H |
| #include FT_INTERNAL_SFNT_H |
| #include FT_INTERNAL_POSTSCRIPT_NAMES_H |
| #include "cffobjs.h" |
| #include "cffload.h" |
| #include FT_INTERNAL_CFF_ERRORS_H |
| |
| #include <string.h> /* for strlen() */ |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* 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_cffobjs |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* FACE FUNCTIONS */ |
| /* */ |
| /*************************************************************************/ |
| |
| static |
| FT_String* CFF_StrCopy( FT_Memory memory, |
| const FT_String* source ) |
| { |
| FT_Error error; |
| FT_String* result = 0; |
| FT_Int len = (FT_Int)strlen( source ); |
| |
| |
| if ( !ALLOC( result, len + 1 ) ) |
| { |
| MEM_Copy( result, source, len ); |
| result[len] = 0; |
| } |
| return result; |
| } |
| |
| |
| #if 0 |
| |
| /* this function is used to build a Unicode charmap from the glyph names */ |
| /* in a file */ |
| static |
| FT_Error CFF_Build_Unicode_Charmap( CFF_Face face, |
| FT_ULong base_offset, |
| PSNames_Interface* psnames ) |
| { |
| CFF_Font* font = (CFF_Font*)face->extra.data; |
| FT_Memory memory = FT_FACE_MEMORY(face); |
| FT_UInt n, num_glyphs = face->root.num_glyphs; |
| const char** glyph_names; |
| FT_Error error; |
| CFF_Font_Dict* dict = &font->top_font.font_dict; |
| FT_ULong charset_offset; |
| FT_Byte format; |
| FT_Stream stream = face->root.stream; |
| |
| |
| charset_offset = dict->charset_offset; |
| if ( !charset_offset ) |
| { |
| FT_ERROR(( "CFF_Build_Unicode_Charmap: charset table is missing\n" )); |
| error = CFF_Err_Invalid_File_Format; |
| goto Exit; |
| } |
| |
| /* allocate the charmap */ |
| if ( ALLOC( face->charmap, ... |
| |
| /* seek to charset table and allocate glyph names table */ |
| if ( FILE_Seek( base_offset + charset_offset ) || |
| ALLOC_ARRAY( glyph_names, num_glyphs, const char* ) ) |
| goto Exit; |
| |
| /* now, read each glyph name and store it in the glyph name table */ |
| if ( READ_Byte( format ) ) |
| goto Fail; |
| |
| switch ( format ) |
| { |
| case 0: /* format 0 - one SID per glyph */ |
| { |
| const char** gname = glyph_names; |
| const char** limit = gname + num_glyphs; |
| |
| |
| if ( ACCESS_Frame( num_glyphs * 2 ) ) |
| goto Fail; |
| |
| for ( ; gname < limit; gname++ ) |
| gname[0] = CFF_Get_String( &font->string_index, |
| GET_UShort(), |
| psnames ); |
| FORGET_Frame(); |
| break; |
| } |
| |
| case 1: /* format 1 - sequential ranges */ |
| case 2: /* format 2 - sequential ranges with 16-bit counts */ |
| { |
| const char** gname = glyph_names; |
| const char** limit = gname + num_glyphs; |
| FT_UInt len = 3; |
| |
| |
| if ( format == 2 ) |
| len++; |
| |
| while ( gname < limit ) |
| { |
| FT_UInt first; |
| FT_UInt count; |
| |
| |
| if ( ACCESS_Frame( len ) ) |
| goto Fail; |
| |
| first = GET_UShort(); |
| if ( format == 3 ) |
| count = GET_UShort(); |
| else |
| count = GET_Byte(); |
| |
| FORGET_Frame(); |
| |
| for ( ; count > 0; count-- ) |
| { |
| gname[0] = CFF_Get_String( &font->string_index, |
| first, |
| psnames ); |
| gname++; |
| first++; |
| } |
| } |
| break; |
| } |
| |
| default: /* unknown charset format! */ |
| FT_ERROR(( "CFF_Build_Unicode_Charmap: unknown charset format!\n" )); |
| error = CFF_Err_Invalid_File_Format; |
| goto Fail; |
| } |
| |
| /* all right, the glyph names were loaded; we now need to create */ |
| /* the corresponding unicode charmap */ |
| |
| Fail: |
| for ( n = 0; n < num_glyphs; n++ ) |
| FREE( glyph_names[n] ); |
| |
| FREE( glyph_names ); |
| |
| Exit: |
| return error; |
| } |
| |
| #endif /* 0 */ |
| |
| |
| static |
| FT_Encoding 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_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; |
| } |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* CFF_Init_Face */ |
| /* */ |
| /* <Description> */ |
| /* Initializes a given OpenType face object. */ |
| /* */ |
| /* <Input> */ |
| /* stream :: The source font stream. */ |
| /* */ |
| /* face_index :: The index of the font face in the resource. */ |
| /* */ |
| /* num_params :: Number of additional generic parameters. Ignored. */ |
| /* */ |
| /* params :: Additional generic parameters. Ignored. */ |
| /* */ |
| /* <InOut> */ |
| /* face :: The newly built face object. */ |
| /* */ |
| /* <Return> */ |
| /* FreeType error code. 0 means success. */ |
| /* */ |
| FT_LOCAL |
| FT_Error CFF_Init_Face( FT_Stream stream, |
| CFF_Face face, |
| FT_Int face_index, |
| FT_Int num_params, |
| FT_Parameter* params ) |
| { |
| FT_Error error; |
| SFNT_Interface* sfnt; |
| PSNames_Interface* psnames; |
| FT_Bool pure_cff = 1; |
| FT_Bool sfnt_format = 0; |
| |
| |
| sfnt = (SFNT_Interface*)FT_Get_Module_Interface( |
| face->root.driver->root.library, "sfnt" ); |
| if ( !sfnt ) |
| goto Bad_Format; |
| |
| psnames = (PSNames_Interface*)FT_Get_Module_Interface( |
| face->root.driver->root.library, "psnames" ); |
| |
| /* create input stream from resource */ |
| if ( FILE_Seek( 0 ) ) |
| goto Exit; |
| |
| /* check that we have a valid OpenType file */ |
| error = sfnt->init_face( stream, face, face_index, num_params, params ); |
| if ( !error ) |
| { |
| if ( face->format_tag != 0x4F54544FL ) /* `OTTO'; OpenType/CFF font */ |
| { |
| FT_TRACE2(( "[not a valid OpenType/CFF font]\n" )); |
| goto Bad_Format; |
| } |
| |
| /* if we are performing a simple font format check, exit immediately */ |
| if ( face_index < 0 ) |
| return CFF_Err_Ok; |
| |
| sfnt_format = 1; |
| |
| /* now, the font can be either an OpenType/CFF font, or an SVG CEF */ |
| /* font in the later case; it doesn't have a `head' table */ |
| error = face->goto_table( face, TTAG_head, stream, 0 ); |
| if ( !error ) |
| { |
| pure_cff = 0; |
| |
| /* load font directory */ |
| error = sfnt->load_face( stream, face, |
| face_index, num_params, params ); |
| if ( error ) |
| goto Exit; |
| } |
| else |
| { |
| /* load the `cmap' table by hand */ |
| error = sfnt->load_charmaps( face, stream ); |
| if ( error ) |
| goto Exit; |
| |
| /* XXX: we don't load the GPOS table, as OpenType Layout */ |
| /* support will be added later to a layout library on top of */ |
| /* FreeType 2 */ |
| } |
| |
| /* now, load the CFF part of the file */ |
| error = face->goto_table( face, TTAG_CFF, stream, 0 ); |
| if ( error ) |
| goto Exit; |
| } |
| else |
| { |
| /* rewind to start of file; we are going to load a pure-CFF font */ |
| if ( FILE_Seek( 0 ) ) |
| goto Exit; |
| error = FT_Err_Ok; |
| } |
| |
| /* now load and parse the CFF table in the file */ |
| { |
| CFF_Font* cff; |
| FT_Memory memory = face->root.memory; |
| FT_Face root; |
| FT_UInt flags; |
| FT_ULong base_offset; |
| |
| |
| if ( ALLOC( cff, sizeof ( *cff ) ) ) |
| goto Exit; |
| |
| base_offset = FILE_Pos(); |
| |
| face->extra.data = cff; |
| error = CFF_Load_Font( stream, face_index, cff ); |
| if ( error ) |
| goto Exit; |
| |
| /* Complement the root flags with some interesting information. */ |
| /* Note that this is only necessary for pure CFF and CEF fonts. */ |
| |
| root = &face->root; |
| if ( pure_cff ) |
| { |
| CFF_Font_Dict* dict = &cff->top_font.font_dict; |
| |
| |
| /* we need the `PSNames' module for pure-CFF and CEF formats */ |
| if ( !psnames ) |
| { |
| FT_ERROR(( "CFF_Init_Face:" )); |
| FT_ERROR(( " cannot open CFF & CEF fonts\n" )); |
| FT_ERROR(( " " )); |
| FT_ERROR(( " without the `PSNames' module\n" )); |
| goto Bad_Format; |
| } |
| |
| /* Set up num_faces. */ |
| root->num_faces = cff->num_faces; |
| |
| /* compute number of glyphs */ |
| if ( dict->cid_registry ) |
| root->num_glyphs = dict->cid_count; |
| else |
| root->num_glyphs = cff->charstrings_index.count; |
| |
| /* set global bbox, as well as EM size */ |
| root->bbox = dict->font_bbox; |
| root->ascender = (FT_Short)(root->bbox.yMax >> 16); |
| root->descender = (FT_Short)(root->bbox.yMin >> 16); |
| root->height = ( ( root->ascender - root->descender ) * 12 ) / 10; |
| |
| if ( dict->units_per_em ) |
| root->units_per_EM = dict->units_per_em; |
| else |
| root->units_per_EM = 1000; |
| |
| /* retrieve font family & style name */ |
| root->family_name = CFF_Get_Name( &cff->name_index, face_index ); |
| if ( dict->cid_registry ) |
| root->style_name = CFF_StrCopy( memory, "Regular" ); /* XXXX */ |
| else |
| root->style_name = CFF_Get_String( &cff->string_index, |
| dict->weight, |
| psnames ); |
| |
| /*******************************************************************/ |
| /* */ |
| /* Compute face flags. */ |
| /* */ |
| flags = FT_FACE_FLAG_SCALABLE | /* scalable outlines */ |
| FT_FACE_FLAG_HORIZONTAL; /* horizontal data */ |
| |
| if ( sfnt_format ) |
| flags |= FT_FACE_FLAG_SFNT; |
| |
| /* fixed width font? */ |
| if ( dict->is_fixed_pitch ) |
| flags |= FT_FACE_FLAG_FIXED_WIDTH; |
| |
| /* XXX: WE DO NOT SUPPORT KERNING METRICS IN THE GPOS TABLE FOR NOW */ |
| #if 0 |
| /* kerning available? */ |
| if ( face->kern_pairs ) |
| flags |= FT_FACE_FLAG_KERNING; |
| #endif |
| |
| #ifndef FT_CONFIG_OPTION_NO_GLYPH_NAMES |
| flags |= FT_FACE_FLAG_GLYPH_NAMES; |
| #endif |
| |
| root->face_flags = flags; |
| |
| /*******************************************************************/ |
| /* */ |
| /* Compute style flags. */ |
| /* */ |
| flags = 0; |
| |
| if ( dict->italic_angle ) |
| flags |= FT_STYLE_FLAG_ITALIC; |
| |
| /* XXX: may not be correct */ |
| if ( cff->top_font.private_dict.force_bold ) |
| flags |= FT_STYLE_FLAG_BOLD; |
| |
| root->style_flags = flags; |
| |
| /* set the charmaps if any */ |
| if ( sfnt_format ) |
| { |
| /*****************************************************************/ |
| /* */ |
| /* Polish the charmaps. */ |
| /* */ |
| /* Try to set the charmap encoding according to the platform & */ |
| /* encoding ID of each charmap. */ |
| /* */ |
| TT_CharMap charmap; |
| FT_Int n; |
| |
| |
| charmap = face->charmaps; |
| root->num_charmaps = face->num_charmaps; |
| |
| /* allocate table of pointers */ |
| if ( ALLOC_ARRAY( root->charmaps, root->num_charmaps, FT_CharMap ) ) |
| goto Exit; |
| |
| for ( n = 0; n < root->num_charmaps; n++, charmap++ ) |
| { |
| FT_Int platform = charmap->cmap.platformID; |
| FT_Int encoding = charmap->cmap.platformEncodingID; |
| |
| |
| charmap->root.face = (FT_Face)face; |
| charmap->root.platform_id = platform; |
| charmap->root.encoding_id = encoding; |
| charmap->root.encoding = find_encoding( platform, encoding ); |
| |
| /* now, set root->charmap with a unicode charmap */ |
| /* wherever available */ |
| if ( !root->charmap && |
| charmap->root.encoding == ft_encoding_unicode ) |
| root->charmap = (FT_CharMap)charmap; |
| |
| root->charmaps[n] = (FT_CharMap)charmap; |
| } |
| } |
| } |
| } |
| |
| Exit: |
| return error; |
| |
| Bad_Format: |
| error = FT_Err_Unknown_File_Format; |
| goto Exit; |
| } |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* CFF_Done_Face */ |
| /* */ |
| /* <Description> */ |
| /* Finalizes a given face object. */ |
| /* */ |
| /* <Input> */ |
| /* face :: A pointer to the face object to destroy. */ |
| /* */ |
| FT_LOCAL |
| void CFF_Done_Face( CFF_Face face ) |
| { |
| FT_Memory memory = face->root.memory; |
| SFNT_Interface* sfnt = (SFNT_Interface*)face->sfnt; |
| |
| |
| if ( sfnt ) |
| sfnt->done_face( face ); |
| |
| { |
| CFF_Font* cff = (CFF_Font*)face->extra.data; |
| |
| |
| if ( cff ) |
| { |
| CFF_Done_Font( cff ); |
| FREE( face->extra.data ); |
| } |
| } |
| } |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* CFF_Init_Driver */ |
| /* */ |
| /* <Description> */ |
| /* Initializes a given OpenType driver object. */ |
| /* */ |
| /* <Input> */ |
| /* driver :: A handle to the target driver object. */ |
| /* */ |
| /* <Return> */ |
| /* FreeType error code. 0 means success. */ |
| /* */ |
| FT_LOCAL_DEF |
| FT_Error CFF_Init_Driver( CFF_Driver driver ) |
| { |
| /* init extension registry if needed */ |
| |
| #ifdef TT_CONFIG_OPTION_EXTEND_ENGINE |
| |
| return TT_Init_Extensions( driver ); |
| |
| #else |
| |
| FT_UNUSED( driver ); |
| |
| return CFF_Err_Ok; |
| |
| #endif |
| } |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* CFF_Done_Driver */ |
| /* */ |
| /* <Description> */ |
| /* Finalizes a given OpenType driver. */ |
| /* */ |
| /* <Input> */ |
| /* driver :: A handle to the target OpenType driver. */ |
| /* */ |
| FT_LOCAL_DEF |
| void CFF_Done_Driver( CFF_Driver driver ) |
| { |
| /* destroy extensions registry if needed */ |
| |
| #ifdef TT_CONFIG_OPTION_EXTEND_ENGINE |
| |
| TT_Done_Extensions( driver ); |
| |
| #else |
| |
| FT_UNUSED( driver ); |
| |
| #endif |
| } |
| |
| |
| /* END */ |