Edit
kc3-lang/freetype/src/sfnt/sfobjs.c
Werner Lemberg
- src/sfnt/sfobjs.c
-
/***************************************************************************/ /* */ /* sfobjs.c */ /* */ /* SFNT object management (base). */ /* */ /* 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. */ /* */ /***************************************************************************/ #ifdef FT_FLAT_COMPILE #include "sfobjs.h" #else #include <sfnt/sfobjs.h> #endif #include <freetype/internal/sfnt.h> #include <freetype/internal/psnames.h> #include <freetype/ttnameid.h> #include <freetype/internal/tterrors.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_sfobjs /*************************************************************************/ /* */ /* <Function> */ /* 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* Get_Name( TT_Face face, FT_UShort nameid ) { FT_Memory memory = face->root.memory; FT_UShort n; TT_NameRec* rec; FT_Bool wide_chars = 1; rec = face->name_table.names; for ( n = 0; n < face->name_table.numNameRecords; n++, rec++ ) { if ( rec->nameID == nameid ) { /* found the name -- now create an ASCII string from it */ FT_Bool found = 0; /* test for Microsoft English language */ if ( rec->platformID == TT_PLATFORM_MICROSOFT && rec->encodingID <= TT_MS_ID_UNICODE_CS && ( rec->languageID & 0x3FF ) == 0x009 ) found = 1; /* test for Apple Unicode encoding */ else if ( rec->platformID == TT_PLATFORM_APPLE_UNICODE ) found = 1; /* test for Apple Roman */ else if ( rec->platformID == TT_PLATFORM_MACINTOSH && rec->languageID == TT_MAC_ID_ROMAN ) { found = 1; wide_chars = 0; } /* found a Unicode name */ if ( found ) { FT_String* string; FT_UInt len; if ( wide_chars ) { FT_UInt m; len = (FT_UInt)rec->stringLength / 2; if ( MEM_Alloc( string, len + 1 ) ) return NULL; for ( m = 0; m < len; m ++ ) string[m] = rec->string[2 * m + 1]; } else { len = rec->stringLength; if ( MEM_Alloc( string, len + 1 ) ) return NULL; MEM_Copy( string, rec->string, len ); } string[len] = '\0'; return string; } } } return NULL; } 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; } LOCAL_FUNC 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_Interface* sfnt; SFNT_Header sfnt_header; /* for now, parameters are unused */ FT_UNUSED( num_params ); FT_UNUSED( params ); sfnt = (SFNT_Interface*)face->sfnt; if ( !sfnt ) { sfnt = (SFNT_Interface*)FT_Get_Module_Interface( library, "sfnt" ); if ( !sfnt ) { error = FT_Err_Invalid_File_Format; goto Exit; } face->sfnt = sfnt; face->goto_table = sfnt->goto_table; } if ( !face->psnames ) { face->psnames = (PSNames_Interface*) FT_Get_Module_Interface( library, "psnames" ); } /* check that we have a valid TrueType file */ error = sfnt->load_sfnt_header( face, stream, face_index, &sfnt_header ); if ( error ) goto Exit; face->format_tag = sfnt_header.format_tag; face->num_tables = sfnt_header.num_tables; /* Load font directory */ error = sfnt->load_directory( face, stream, &sfnt_header ); if ( error ) goto Exit; face->root.num_faces = face->ttc_header.count; if ( face->root.num_faces < 1 ) face->root.num_faces = 1; Exit: return error; } #undef LOAD_ #define LOAD_( x ) ( ( error = sfnt->load_##x( face, stream ) ) \ != TT_Err_Ok ) LOCAL_FUNC 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; SFNT_Interface* sfnt = (SFNT_Interface*)face->sfnt; FT_UNUSED( face_index ); FT_UNUSED( num_params ); FT_UNUSED( params ); /* Load tables */ if ( LOAD_( header ) || LOAD_( max_profile ) || /* load the `hhea' & `hmtx' tables at once */ ( error = sfnt->load_metrics( face, stream, 0 ) ) != TT_Err_Ok || /* try to load the `vhea' & `vmtx' at once if present */ ( error = sfnt->load_metrics( face, stream, 1 ) ) != TT_Err_Ok || LOAD_( charmaps ) || LOAD_( names ) || LOAD_( os2 ) || LOAD_( psnames ) ) goto Exit; /* the optional tables */ #ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS /* embedded bitmap support. */ if ( sfnt->load_sbits && LOAD_( sbits ) ) goto Exit; #endif /* TT_CONFIG_OPTION_EMBEDDED_BITMAPS */ if ( LOAD_( hdmx ) || LOAD_( gasp ) || LOAD_( kerning ) || LOAD_( pclt ) ) goto Exit; #ifdef TT_CONFIG_OPTION_EXTEND_ENGINE if ( ( error = TT_Extension_Create( face ) ) != TT_Err_Ok ) goto Exit; #endif face->root.family_name = Get_Name( face, TT_NAME_ID_FONT_FAMILY ); face->root.style_name = Get_Name( face, TT_NAME_ID_FONT_SUBFAMILY ); /* now set up root fields */ { FT_Face root = &face->root; FT_Int flags; TT_CharMap charmap; FT_Int n; FT_Memory memory; memory = root->memory; /*********************************************************************/ /* */ /* Compute face flags. */ /* */ flags = FT_FACE_FLAG_SCALABLE | /* scalable outlines */ FT_FACE_FLAG_SFNT | /* SFNT file format */ FT_FACE_FLAG_HORIZONTAL; /* horizontal data */ #ifdef TT_CONFIG_OPTION_POSTSCRIPT_NAMES /* might need more polish to detect the presence of a Postscript */ /* name table in the font */ 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 ( face->kern_pairs ) flags |= FT_FACE_FLAG_KERNING; root->face_flags = flags; /*********************************************************************/ /* */ /* Compute style flags. */ /* */ flags = 0; if ( face->os2.version != 0xFFFF ) { /* we have an OS/2 table; use the `fsSelection' field */ if ( face->os2.fsSelection & 1 ) flags |= FT_STYLE_FLAG_ITALIC; if ( face->os2.fsSelection & 32 ) 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. */ /* */ 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; } #ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS if ( face->num_sbit_strikes ) { root->num_fixed_sizes = face->num_sbit_strikes; if ( ALLOC_ARRAY( root->available_sizes, face->num_sbit_strikes, FT_Bitmap_Size ) ) return error; for ( n = 0 ; n < face->num_sbit_strikes ; n++ ) { root->available_sizes[n].width = face->sbit_strikes[n].x_ppem; root->available_sizes[n].height = face->sbit_strikes[n].y_ppem; } } else #else /* TT_CONFIG_OPTION_EMBEDDED_BITMAPS */ { root->num_fixed_sizes = 0; root->available_sizes = 0; } #endif /* TT_CONFIG_OPTION_EMBEDDED_BITMAPS */ /*********************************************************************/ /* */ /* Set up metrics. */ /* */ 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; /* The ascender/descender/height are computed from the OS/2 table */ /* when found. Otherwise, they're taken from the horizontal header. */ if ( face->os2.version != 0xFFFF ) { root->ascender = face->os2.sTypoAscender; root->descender = -face->os2.sTypoDescender; root->height = root->ascender + root->descender + face->os2.sTypoLineGap; } else { root->ascender = face->horizontal.Ascender; root->descender = face->horizontal.Descender; root->height = root->ascender + root->descender + face->horizontal.Line_Gap; } root->max_advance_width = face->horizontal.advance_Width_Max; root->max_advance_height = face->vertical_info ? face->vertical.advance_Height_Max : root->height; root->underline_position = face->postscript.underlinePosition; root->underline_thickness = face->postscript.underlineThickness; /* root->max_points -- already set up */ /* root->max_contours -- already set up */ } Exit: return error; } #undef LOAD_ LOCAL_FUNC void SFNT_Done_Face( TT_Face face ) { FT_Memory memory = face->root.memory; SFNT_Interface* sfnt = (SFNT_Interface*)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_sbits ) sfnt->free_sbits( face ); } /* freeing the kerning table */ FREE( face->kern_pairs ); face->num_kern_pairs = 0; /* freeing the collection table */ FREE( face->ttc_header.offsets ); face->ttc_header.count = 0; /* freeing table directory */ FREE( face->dir_tables ); face->num_tables = 0; /* freeing the character mapping tables */ if ( sfnt && sfnt->load_charmaps ) { FT_UShort n; for ( n = 0; n < face->num_charmaps; n++ ) sfnt->free_charmap( face, &face->charmaps[n].cmap ); } FREE( face->charmaps ); face->num_charmaps = 0; FREE( face->root.charmaps ); face->root.num_charmaps = 0; face->root.charmap = 0; /* freeing the horizontal metrics */ FREE( face->horizontal.long_metrics ); FREE( face->horizontal.short_metrics ); /* freeing the vertical ones, if any */ if ( face->vertical_info ) { FREE( face->vertical.long_metrics ); FREE( face->vertical.short_metrics ); face->vertical_info = 0; } /* freeing the gasp table */ FREE( face->gasp.gaspRanges ); face->gasp.numRanges = 0; /* freeing the name table */ sfnt->free_names( face ); /* freeing the hdmx table */ sfnt->free_hdmx( face ); /* freeing family and style name */ FREE( face->root.family_name ); FREE( face->root.style_name ); /* freeing sbit size table */ face->root.num_fixed_sizes = 0; if ( face->root.available_sizes ) FREE( face->root.available_sizes ); face->sfnt = 0; } /* END */