ref: d1d4bffe2f0171481693d17fe3ebad3e82e5d911
dir: /src/sfnt/sfdriver.c/
/***************************************************************************/ /* */ /* sfdriver.c */ /* */ /* High-level SFNT driver interface (body). */ /* */ /* Copyright 1996-2001, 2002, 2003, 2004, 2005, 2006 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_SFNT_H #include FT_INTERNAL_OBJECTS_H #include "sfdriver.h" #include "ttload.h" #include "sfobjs.h" #include "sferrors.h" #ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS #include "ttsbit.h" #endif #ifdef TT_CONFIG_OPTION_POSTSCRIPT_NAMES #include "ttpost.h" #endif #ifdef TT_CONFIG_OPTION_BDF #include "ttbdf.h" #include FT_SERVICE_BDF_H #endif #include "ttcmap.h" #include "ttkern.h" #include FT_SERVICE_GLYPH_DICT_H #include FT_SERVICE_POSTSCRIPT_NAME_H #include FT_SERVICE_SFNT_H #include FT_SERVICE_TT_CMAP_H /* * SFNT TABLE SERVICE * */ static void* get_sfnt_table( TT_Face face, FT_Sfnt_Tag tag ) { void* table; switch ( tag ) { case ft_sfnt_head: table = &face->header; break; case ft_sfnt_hhea: table = &face->horizontal; break; case ft_sfnt_vhea: table = face->vertical_info ? &face->vertical : 0; break; case ft_sfnt_os2: table = face->os2.version == 0xFFFFU ? 0 : &face->os2; break; case ft_sfnt_post: table = &face->postscript; break; case ft_sfnt_maxp: table = &face->max_profile; break; case ft_sfnt_pclt: table = face->pclt.Version ? &face->pclt : 0; break; default: table = 0; } return table; } static FT_Error sfnt_table_info( TT_Face face, FT_UInt idx, FT_ULong *tag, FT_ULong *length ) { if ( !tag || !length ) return SFNT_Err_Invalid_Argument; if ( idx >= face->num_tables ) return SFNT_Err_Table_Missing; *tag = face->dir_tables[idx].Tag; *length = face->dir_tables[idx].Length; return SFNT_Err_Ok; } static const FT_Service_SFNT_TableRec sfnt_service_sfnt_table = { (FT_SFNT_TableLoadFunc)tt_face_load_any, (FT_SFNT_TableGetFunc) get_sfnt_table, (FT_SFNT_TableInfoFunc)sfnt_table_info }; #ifdef TT_CONFIG_OPTION_POSTSCRIPT_NAMES /* * GLYPH DICT SERVICE * */ static FT_Error sfnt_get_glyph_name( TT_Face face, FT_UInt glyph_index, FT_Pointer buffer, FT_UInt buffer_max ) { FT_String* gname; FT_Error error; error = tt_face_get_ps_name( face, glyph_index, &gname ); if ( !error && buffer_max > 0 ) { FT_UInt len = (FT_UInt)( ft_strlen( gname ) ); if ( len >= buffer_max ) len = buffer_max - 1; FT_MEM_COPY( buffer, gname, len ); ((FT_Byte*)buffer)[len] = 0; } return error; } static const FT_Service_GlyphDictRec sfnt_service_glyph_dict = { (FT_GlyphDict_GetNameFunc) sfnt_get_glyph_name, (FT_GlyphDict_NameIndexFunc)NULL }; #endif /* TT_CONFIG_OPTION_POSTSCRIPT_NAMES */ /* * POSTSCRIPT NAME SERVICE * */ static const char* sfnt_get_ps_name( TT_Face face ) { FT_Int n, found_win, found_apple; const char* result = NULL; /* shouldn't happen, but just in case to avoid memory leaks */ if ( face->postscript_name ) return face->postscript_name; /* scan the name table to see whether we have a Postscript name here, */ /* either in Macintosh or Windows platform encodings */ found_win = -1; found_apple = -1; for ( n = 0; n < face->num_names; n++ ) { TT_NameEntryRec* name = face->name_table.names + n; if ( name->nameID == 6 && name->stringLength > 0 ) { if ( name->platformID == 3 && name->encodingID == 1 && name->languageID == 0x409 ) found_win = n; if ( name->platformID == 1 && name->encodingID == 0 && name->languageID == 0 ) found_apple = n; } } if ( found_win != -1 ) { FT_Memory memory = face->root.memory; TT_NameEntryRec* name = face->name_table.names + found_win; FT_UInt len = name->stringLength / 2; FT_Error error = SFNT_Err_Ok; FT_UNUSED( error ); if ( !FT_ALLOC( result, name->stringLength + 1 ) ) { FT_Stream stream = face->name_table.stream; FT_String* r = (FT_String*)result; FT_Byte* p = (FT_Byte*)name->string; if ( FT_STREAM_SEEK( name->stringOffset ) || FT_FRAME_ENTER( name->stringLength ) ) { FT_FREE( result ); name->stringLength = 0; name->stringOffset = 0; FT_FREE( name->string ); goto Exit; } p = (FT_Byte*)stream->cursor; for ( ; len > 0; len--, p += 2 ) { if ( p[0] == 0 && p[1] >= 32 && p[1] < 128 ) *r++ = p[1]; } *r = '\0'; FT_FRAME_EXIT(); } goto Exit; } if ( found_apple != -1 ) { FT_Memory memory = face->root.memory; TT_NameEntryRec* name = face->name_table.names + found_apple; FT_UInt len = name->stringLength; FT_Error error = SFNT_Err_Ok; FT_UNUSED( error ); if ( !FT_ALLOC( result, len + 1 ) ) { FT_Stream stream = face->name_table.stream; if ( FT_STREAM_SEEK( name->stringOffset ) || FT_STREAM_READ( result, len ) ) { name->stringOffset = 0; name->stringLength = 0; FT_FREE( name->string ); FT_FREE( result ); goto Exit; } ((char*)result)[len] = '\0'; } } Exit: face->postscript_name = result; return result; } static const FT_Service_PsFontNameRec sfnt_service_ps_name = { (FT_PsName_GetFunc)sfnt_get_ps_name }; /* * TT CMAP INFO */ static const FT_Service_TTCMapsRec tt_service_get_cmap_info = { (TT_CMap_Info_GetFunc)tt_get_cmap_info }; #ifdef TT_CONFIG_OPTION_BDF static FT_Error sfnt_get_charset_id( TT_Face face, const char* *acharset_encoding, const char* *acharset_registry ) { BDF_PropertyRec encoding, registry; FT_Error error; /* XXX: I don't know whether this is correct, since * tt_face_find_bdf_prop only returns something correct if we have * previously selected a size that is listed in the BDF table. * Should we change the BDF table format to include single offsets * for `CHARSET_REGISTRY' and `CHARSET_ENCODING'? */ error = tt_face_find_bdf_prop( face, "CHARSET_REGISTRY", ®istry ); if ( !error ) { error = tt_face_find_bdf_prop( face, "CHARSET_ENCODING", &encoding ); if ( !error ) { if ( registry.type == BDF_PROPERTY_TYPE_ATOM && encoding.type == BDF_PROPERTY_TYPE_ATOM ) { *acharset_encoding = encoding.u.atom; *acharset_registry = registry.u.atom; } else error = FT_Err_Invalid_Argument; } } return error; } static const FT_Service_BDFRec sfnt_service_bdf = { (FT_BDF_GetCharsetIdFunc) sfnt_get_charset_id, (FT_BDF_GetPropertyFunc) tt_face_find_bdf_prop, }; #endif /* TT_CONFIG_OPTION_BDF */ /* * SERVICE LIST */ static const FT_ServiceDescRec sfnt_services[] = { { FT_SERVICE_ID_SFNT_TABLE, &sfnt_service_sfnt_table }, { FT_SERVICE_ID_POSTSCRIPT_FONT_NAME, &sfnt_service_ps_name }, #ifdef TT_CONFIG_OPTION_POSTSCRIPT_NAMES { FT_SERVICE_ID_GLYPH_DICT, &sfnt_service_glyph_dict }, #endif #ifdef TT_CONFIG_OPTION_BDF { FT_SERVICE_ID_BDF, &sfnt_service_bdf }, #endif { FT_SERVICE_ID_TT_CMAP, &tt_service_get_cmap_info }, { NULL, NULL } }; FT_CALLBACK_DEF( FT_Module_Interface ) sfnt_get_interface( FT_Module module, const char* module_interface ) { FT_UNUSED( module ); return ft_service_list_lookup( sfnt_services, module_interface ); } static const SFNT_Interface sfnt_interface = { tt_face_goto_table, sfnt_init_face, sfnt_load_face, sfnt_done_face, sfnt_get_interface, tt_face_load_any, tt_face_load_sfnt_header, tt_face_load_directory, tt_face_load_header, tt_face_load_metrics_header, tt_face_load_cmap, tt_face_load_max_profile, tt_face_load_os2, tt_face_load_postscript, tt_face_load_names, tt_face_free_names, tt_face_load_hdmx, tt_face_free_hdmx, tt_face_load_kern, tt_face_load_gasp, tt_face_load_pclt, #ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS /* see `ttload.h' */ tt_face_load_bitmap_header, /* see `ttsbit.h' and `sfnt.h' */ tt_face_set_sbit_strike, tt_face_load_strike_metrics, tt_face_load_sbit_strikes, #ifdef FT_OPTIMIZE_MEMORY 0, 0, #else tt_find_sbit_image, tt_load_sbit_metrics, #endif tt_face_load_sbit_image, tt_face_free_sbit_strikes, #else /* TT_CONFIG_OPTION_EMBEDDED_BITMAPS */ 0, 0, 0, 0, 0, 0, 0, #endif /* TT_CONFIG_OPTION_EMBEDDED_BITMAPS */ /* see `ttkern.h' */ tt_face_get_kerning, #ifdef TT_CONFIG_OPTION_POSTSCRIPT_NAMES /* see `ttpost.h' */ tt_face_get_ps_name, tt_face_free_ps_names, #else /* TT_CONFIG_OPTION_POSTSCRIPT_NAMES */ 0, 0, #endif /* TT_CONFIG_OPTION_POSTSCRIPT_NAMES */ }; FT_CALLBACK_TABLE_DEF const FT_Module_Class sfnt_module_class = { 0, /* not a font driver or renderer */ sizeof( FT_ModuleRec ), "sfnt", /* driver name */ 0x10000L, /* driver version 1.0 */ 0x20000L, /* driver requires FreeType 2.0 or higher */ (const void*)&sfnt_interface, /* module specific interface */ (FT_Module_Constructor)0, (FT_Module_Destructor) 0, (FT_Module_Requester) sfnt_get_interface }; /* END */