| /***************************************************************************/ |
| /* */ |
| /* sfdriver.c */ |
| /* */ |
| /* High-level SFNT driver interface (body). */ |
| /* */ |
| /* Copyright 1996-2017 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_SFNT_H |
| #include FT_INTERNAL_OBJECTS_H |
| |
| #include "sfdriver.h" |
| #include "ttload.h" |
| #include "sfobjs.h" |
| #include "sfntpic.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 "ttmtx.h" |
| |
| #include FT_SERVICE_GLYPH_DICT_H |
| #include FT_SERVICE_POSTSCRIPT_NAME_H |
| #include FT_SERVICE_SFNT_H |
| #include FT_SERVICE_TT_CMAP_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_sfdriver |
| |
| |
| /* |
| * 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 : NULL; |
| break; |
| |
| case FT_SFNT_OS2: |
| table = ( face->os2.version == 0xFFFFU ) ? NULL : &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 : NULL; |
| break; |
| |
| default: |
| table = NULL; |
| } |
| |
| return table; |
| } |
| |
| |
| static FT_Error |
| sfnt_table_info( TT_Face face, |
| FT_UInt idx, |
| FT_ULong *tag, |
| FT_ULong *offset, |
| FT_ULong *length ) |
| { |
| if ( !offset || !length ) |
| return FT_THROW( Invalid_Argument ); |
| |
| if ( !tag ) |
| *length = face->num_tables; |
| else |
| { |
| if ( idx >= face->num_tables ) |
| return FT_THROW( Table_Missing ); |
| |
| *tag = face->dir_tables[idx].Tag; |
| *offset = face->dir_tables[idx].Offset; |
| *length = face->dir_tables[idx].Length; |
| } |
| |
| return FT_Err_Ok; |
| } |
| |
| |
| FT_DEFINE_SERVICE_SFNT_TABLEREC( |
| sfnt_service_sfnt_table, |
| |
| (FT_SFNT_TableLoadFunc)tt_face_load_any, /* load_table */ |
| (FT_SFNT_TableGetFunc) get_sfnt_table, /* get_table */ |
| (FT_SFNT_TableInfoFunc)sfnt_table_info /* table_info */ |
| ) |
| |
| |
| #ifdef TT_CONFIG_OPTION_POSTSCRIPT_NAMES |
| |
| /* |
| * GLYPH DICT SERVICE |
| * |
| */ |
| |
| static FT_Error |
| sfnt_get_glyph_name( FT_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( (TT_Face)face, glyph_index, &gname ); |
| if ( !error ) |
| FT_STRCPYN( buffer, gname, buffer_max ); |
| |
| return error; |
| } |
| |
| |
| static FT_UInt |
| sfnt_get_name_index( FT_Face face, |
| FT_String* glyph_name ) |
| { |
| TT_Face ttface = (TT_Face)face; |
| |
| FT_UInt i, max_gid = FT_UINT_MAX; |
| |
| |
| if ( face->num_glyphs < 0 ) |
| return 0; |
| else if ( (FT_ULong)face->num_glyphs < FT_UINT_MAX ) |
| max_gid = (FT_UInt)face->num_glyphs; |
| else |
| FT_TRACE0(( "Ignore glyph names for invalid GID 0x%08x - 0x%08x\n", |
| FT_UINT_MAX, face->num_glyphs )); |
| |
| for ( i = 0; i < max_gid; i++ ) |
| { |
| FT_String* gname; |
| FT_Error error = tt_face_get_ps_name( ttface, i, &gname ); |
| |
| |
| if ( error ) |
| continue; |
| |
| if ( !ft_strcmp( glyph_name, gname ) ) |
| return i; |
| } |
| |
| return 0; |
| } |
| |
| |
| FT_DEFINE_SERVICE_GLYPHDICTREC( |
| sfnt_service_glyph_dict, |
| |
| (FT_GlyphDict_GetNameFunc) sfnt_get_glyph_name, /* get_name */ |
| (FT_GlyphDict_NameIndexFunc)sfnt_get_name_index /* name_index */ |
| ) |
| |
| #endif /* TT_CONFIG_OPTION_POSTSCRIPT_NAMES */ |
| |
| |
| /* |
| * POSTSCRIPT NAME SERVICE |
| * |
| */ |
| |
| /* an array representing allowed ASCII characters in a PS string */ |
| static const unsigned char sfnt_ps_map[16] = |
| { |
| /* 4 0 C 8 */ |
| 0x00, 0x00, /* 0x00: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 */ |
| 0x00, 0x00, /* 0x10: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 */ |
| 0xDE, 0x7C, /* 0x20: 1 1 0 1 1 1 1 0 0 1 1 1 1 1 0 0 */ |
| 0xFF, 0xAF, /* 0x30: 1 1 1 1 1 1 1 1 1 0 1 0 1 1 1 1 */ |
| 0xFF, 0xFF, /* 0x40: 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 */ |
| 0xFF, 0xD7, /* 0x50: 1 1 1 1 1 1 1 1 1 1 0 1 0 1 1 1 */ |
| 0xFF, 0xFF, /* 0x60: 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 */ |
| 0xFF, 0x57 /* 0x70: 1 1 1 1 1 1 1 1 0 1 0 1 0 1 1 1 */ |
| }; |
| |
| |
| static int |
| sfnt_is_postscript( int c ) |
| { |
| unsigned int cc; |
| |
| |
| if ( c < 0 || c >= 0x80 ) |
| return 0; |
| |
| cc = (unsigned int)c; |
| |
| return sfnt_ps_map[cc >> 3] & ( 1 << ( cc & 0x07 ) ); |
| } |
| |
| |
| typedef int (*char_type_func)( int c ); |
| |
| |
| /* handling of PID/EID 3/0 and 3/1 is the same */ |
| #define IS_WIN( n ) ( (n)->platformID == 3 && \ |
| ( (n)->encodingID == 1 || (n)->encodingID == 0 ) && \ |
| (n)->languageID == 0x409 ) |
| |
| #define IS_APPLE( n ) ( (n)->platformID == 1 && \ |
| (n)->encodingID == 0 && \ |
| (n)->languageID == 0 ) |
| |
| static const char* |
| get_win_string( FT_Memory memory, |
| FT_Stream stream, |
| TT_Name entry, |
| char_type_func char_type, |
| FT_Bool report_invalid_characters ) |
| { |
| FT_Error error = FT_Err_Ok; |
| |
| const char* result; |
| FT_String* r; |
| FT_Char* p; |
| FT_UInt len; |
| |
| FT_UNUSED( error ); |
| |
| |
| if ( FT_ALLOC( result, entry->stringLength / 2 + 1 ) ) |
| return NULL; |
| |
| if ( FT_STREAM_SEEK( entry->stringOffset ) || |
| FT_FRAME_ENTER( entry->stringLength ) ) |
| { |
| FT_FREE( result ); |
| entry->stringLength = 0; |
| entry->stringOffset = 0; |
| FT_FREE( entry->string ); |
| |
| return NULL; |
| } |
| |
| r = (FT_String*)result; |
| p = (FT_Char*)stream->cursor; |
| |
| for ( len = entry->stringLength / 2; len > 0; len--, p += 2 ) |
| { |
| if ( p[0] == 0 ) |
| { |
| if ( char_type( p[1] ) ) |
| *r++ = p[1]; |
| else |
| { |
| if ( report_invalid_characters ) |
| { |
| FT_TRACE0(( "get_win_string:" |
| " Character `%c' (0x%X) invalid in PS name string\n", |
| p[1], p[1] )); |
| /* it's not the job of FreeType to correct PS names... */ |
| *r++ = p[1]; |
| } |
| } |
| } |
| } |
| *r = '\0'; |
| |
| FT_FRAME_EXIT(); |
| |
| return result; |
| } |
| |
| |
| static const char* |
| get_apple_string( FT_Memory memory, |
| FT_Stream stream, |
| TT_Name entry, |
| char_type_func char_type, |
| FT_Bool report_invalid_characters ) |
| { |
| FT_Error error = FT_Err_Ok; |
| |
| const char* result; |
| FT_String* r; |
| FT_Char* p; |
| FT_UInt len; |
| |
| FT_UNUSED( error ); |
| |
| |
| if ( FT_ALLOC( result, entry->stringLength + 1 ) ) |
| return NULL; |
| |
| if ( FT_STREAM_SEEK( entry->stringOffset ) || |
| FT_FRAME_ENTER( entry->stringLength ) ) |
| { |
| FT_FREE( result ); |
| entry->stringOffset = 0; |
| entry->stringLength = 0; |
| FT_FREE( entry->string ); |
| |
| return NULL; |
| } |
| |
| r = (FT_String*)result; |
| p = (FT_Char*)stream->cursor; |
| |
| for ( len = entry->stringLength; len > 0; len--, p++ ) |
| { |
| if ( char_type( *p ) ) |
| *r++ = *p; |
| else |
| { |
| if ( report_invalid_characters ) |
| { |
| FT_TRACE0(( "get_apple_string:" |
| " Character `%c' (0x%X) invalid in PS name string\n", |
| *p, *p )); |
| /* it's not the job of FreeType to correct PS names... */ |
| *r++ = *p; |
| } |
| } |
| } |
| *r = '\0'; |
| |
| FT_FRAME_EXIT(); |
| |
| return result; |
| } |
| |
| |
| static FT_Bool |
| sfnt_get_name_id( TT_Face face, |
| FT_UShort id, |
| FT_Int *win, |
| FT_Int *apple ) |
| { |
| FT_Int n; |
| |
| |
| *win = -1; |
| *apple = -1; |
| |
| for ( n = 0; n < face->num_names; n++ ) |
| { |
| TT_Name name = face->name_table.names + n; |
| |
| |
| if ( name->nameID == id && name->stringLength > 0 ) |
| { |
| if ( IS_WIN( name ) ) |
| *win = n; |
| |
| if ( IS_APPLE( name ) ) |
| *apple = n; |
| } |
| } |
| |
| return ( *win >= 0 ) || ( *apple >= 0 ); |
| } |
| |
| |
| static const char* |
| sfnt_get_ps_name( TT_Face face ) |
| { |
| FT_Int found, win, apple; |
| const char* result = NULL; |
| |
| |
| 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 = sfnt_get_name_id( face, 6, &win, &apple ); |
| |
| if ( found ) |
| { |
| /* prefer Windows entries over Apple */ |
| if ( win != -1 ) |
| result = get_win_string( face->root.memory, |
| face->name_table.stream, |
| face->name_table.names + win, |
| sfnt_is_postscript, |
| 1 ); |
| else |
| result = get_apple_string( face->root.memory, |
| face->name_table.stream, |
| face->name_table.names + apple, |
| sfnt_is_postscript, |
| 1 ); |
| } |
| |
| face->postscript_name = result; |
| |
| return result; |
| } |
| |
| |
| FT_DEFINE_SERVICE_PSFONTNAMEREC( |
| sfnt_service_ps_name, |
| |
| (FT_PsName_GetFunc)sfnt_get_ps_name /* get_ps_font_name */ |
| ) |
| |
| |
| /* |
| * TT CMAP INFO |
| */ |
| FT_DEFINE_SERVICE_TTCMAPSREC( |
| tt_service_get_cmap_info, |
| |
| (TT_CMap_Info_GetFunc)tt_get_cmap_info /* 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_THROW( Invalid_Argument ); |
| } |
| } |
| |
| return error; |
| } |
| |
| |
| FT_DEFINE_SERVICE_BDFRec( |
| sfnt_service_bdf, |
| |
| (FT_BDF_GetCharsetIdFunc)sfnt_get_charset_id, /* get_charset_id */ |
| (FT_BDF_GetPropertyFunc) tt_face_find_bdf_prop /* get_property */ |
| ) |
| |
| |
| #endif /* TT_CONFIG_OPTION_BDF */ |
| |
| |
| /* |
| * SERVICE LIST |
| */ |
| |
| #if defined TT_CONFIG_OPTION_POSTSCRIPT_NAMES && defined TT_CONFIG_OPTION_BDF |
| FT_DEFINE_SERVICEDESCREC5( |
| sfnt_services, |
| |
| FT_SERVICE_ID_SFNT_TABLE, &SFNT_SERVICE_SFNT_TABLE_GET, |
| FT_SERVICE_ID_POSTSCRIPT_FONT_NAME, &SFNT_SERVICE_PS_NAME_GET, |
| FT_SERVICE_ID_GLYPH_DICT, &SFNT_SERVICE_GLYPH_DICT_GET, |
| FT_SERVICE_ID_BDF, &SFNT_SERVICE_BDF_GET, |
| FT_SERVICE_ID_TT_CMAP, &TT_SERVICE_CMAP_INFO_GET ) |
| #elif defined TT_CONFIG_OPTION_POSTSCRIPT_NAMES |
| FT_DEFINE_SERVICEDESCREC4( |
| sfnt_services, |
| |
| FT_SERVICE_ID_SFNT_TABLE, &SFNT_SERVICE_SFNT_TABLE_GET, |
| FT_SERVICE_ID_POSTSCRIPT_FONT_NAME, &SFNT_SERVICE_PS_NAME_GET, |
| FT_SERVICE_ID_GLYPH_DICT, &SFNT_SERVICE_GLYPH_DICT_GET, |
| FT_SERVICE_ID_TT_CMAP, &TT_SERVICE_CMAP_INFO_GET ) |
| #elif defined TT_CONFIG_OPTION_BDF |
| FT_DEFINE_SERVICEDESCREC4( |
| sfnt_services, |
| |
| FT_SERVICE_ID_SFNT_TABLE, &SFNT_SERVICE_SFNT_TABLE_GET, |
| FT_SERVICE_ID_POSTSCRIPT_FONT_NAME, &SFNT_SERVICE_PS_NAME_GET, |
| FT_SERVICE_ID_BDF, &SFNT_SERVICE_BDF_GET, |
| FT_SERVICE_ID_TT_CMAP, &TT_SERVICE_CMAP_INFO_GET ) |
| #else |
| FT_DEFINE_SERVICEDESCREC3( |
| sfnt_services, |
| |
| FT_SERVICE_ID_SFNT_TABLE, &SFNT_SERVICE_SFNT_TABLE_GET, |
| FT_SERVICE_ID_POSTSCRIPT_FONT_NAME, &SFNT_SERVICE_PS_NAME_GET, |
| FT_SERVICE_ID_TT_CMAP, &TT_SERVICE_CMAP_INFO_GET ) |
| #endif |
| |
| |
| FT_CALLBACK_DEF( FT_Module_Interface ) |
| sfnt_get_interface( FT_Module module, |
| const char* module_interface ) |
| { |
| /* SFNT_SERVICES_GET dereferences `library' in PIC mode */ |
| #ifdef FT_CONFIG_OPTION_PIC |
| FT_Library library; |
| |
| |
| if ( !module ) |
| return NULL; |
| library = module->library; |
| if ( !library ) |
| return NULL; |
| #else |
| FT_UNUSED( module ); |
| #endif |
| |
| return ft_service_list_lookup( SFNT_SERVICES_GET, module_interface ); |
| } |
| |
| |
| #ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS |
| #define PUT_EMBEDDED_BITMAPS( a ) a |
| #else |
| #define PUT_EMBEDDED_BITMAPS( a ) NULL |
| #endif |
| |
| #ifdef TT_CONFIG_OPTION_POSTSCRIPT_NAMES |
| #define PUT_PS_NAMES( a ) a |
| #else |
| #define PUT_PS_NAMES( a ) NULL |
| #endif |
| |
| FT_DEFINE_SFNT_INTERFACE( |
| sfnt_interface, |
| |
| tt_face_goto_table, /* TT_Loader_GotoTableFunc goto_table */ |
| |
| sfnt_init_face, /* TT_Init_Face_Func init_face */ |
| sfnt_load_face, /* TT_Load_Face_Func load_face */ |
| sfnt_done_face, /* TT_Done_Face_Func done_face */ |
| sfnt_get_interface, /* FT_Module_Requester get_interface */ |
| |
| tt_face_load_any, /* TT_Load_Any_Func load_any */ |
| |
| tt_face_load_head, /* TT_Load_Table_Func load_head */ |
| tt_face_load_hhea, /* TT_Load_Metrics_Func load_hhea */ |
| tt_face_load_cmap, /* TT_Load_Table_Func load_cmap */ |
| tt_face_load_maxp, /* TT_Load_Table_Func load_maxp */ |
| tt_face_load_os2, /* TT_Load_Table_Func load_os2 */ |
| tt_face_load_post, /* TT_Load_Table_Func load_post */ |
| |
| tt_face_load_name, /* TT_Load_Table_Func load_name */ |
| tt_face_free_name, /* TT_Free_Table_Func free_name */ |
| |
| tt_face_load_kern, /* TT_Load_Table_Func load_kern */ |
| tt_face_load_gasp, /* TT_Load_Table_Func load_gasp */ |
| tt_face_load_pclt, /* TT_Load_Table_Func load_init */ |
| |
| /* see `ttload.h' */ |
| PUT_EMBEDDED_BITMAPS( tt_face_load_bhed ), |
| /* TT_Load_Table_Func load_bhed */ |
| PUT_EMBEDDED_BITMAPS( tt_face_load_sbit_image ), |
| /* TT_Load_SBit_Image_Func load_sbit_image */ |
| |
| /* see `ttpost.h' */ |
| PUT_PS_NAMES( tt_face_get_ps_name ), |
| /* TT_Get_PS_Name_Func get_psname */ |
| PUT_PS_NAMES( tt_face_free_ps_names ), |
| /* TT_Free_Table_Func free_psnames */ |
| |
| /* since version 2.1.8 */ |
| tt_face_get_kerning, /* TT_Face_GetKerningFunc get_kerning */ |
| |
| /* since version 2.2 */ |
| tt_face_load_font_dir, /* TT_Load_Table_Func load_font_dir */ |
| tt_face_load_hmtx, /* TT_Load_Metrics_Func load_hmtx */ |
| |
| /* see `ttsbit.h' and `sfnt.h' */ |
| PUT_EMBEDDED_BITMAPS( tt_face_load_sbit ), |
| /* TT_Load_Table_Func load_eblc */ |
| PUT_EMBEDDED_BITMAPS( tt_face_free_sbit ), |
| /* TT_Free_Table_Func free_eblc */ |
| |
| PUT_EMBEDDED_BITMAPS( tt_face_set_sbit_strike ), |
| /* TT_Set_SBit_Strike_Func set_sbit_strike */ |
| PUT_EMBEDDED_BITMAPS( tt_face_load_strike_metrics ), |
| /* TT_Load_Strike_Metrics_Func load_strike_metrics */ |
| |
| tt_face_get_metrics, /* TT_Get_Metrics_Func get_metrics */ |
| |
| tt_face_get_name, /* TT_Get_Name_Func get_name */ |
| sfnt_get_name_id /* TT_Get_Name_ID_Func get_name_id */ |
| ) |
| |
| |
| FT_DEFINE_MODULE( |
| 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_GET, /* module specific interface */ |
| |
| (FT_Module_Constructor)NULL, /* module_init */ |
| (FT_Module_Destructor) NULL, /* module_done */ |
| (FT_Module_Requester) sfnt_get_interface /* get_interface */ |
| ) |
| |
| |
| /* END */ |
