diff options
Diffstat (limited to 'src/sfnt/sfdriver.c')
| -rw-r--r-- | src/sfnt/sfdriver.c | 618 |
1 files changed, 618 insertions, 0 deletions
diff --git a/src/sfnt/sfdriver.c b/src/sfnt/sfdriver.c new file mode 100644 index 0000000..5ba22a6 --- /dev/null +++ b/src/sfnt/sfdriver.c @@ -0,0 +1,618 @@ +/***************************************************************************/ +/* */ +/* sfdriver.c */ +/* */ +/* High-level SFNT driver interface (body). */ +/* */ +/* Copyright 1996-2001, 2002, 2003, 2004, 2005, 2006, 2007 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 "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 + + + /* + * 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 ) + FT_STRCPYN( buffer, gname, buffer_max ); + + 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 ); + } + + +#ifdef FT_CONFIG_OPTION_OLD_INTERNALS + + FT_CALLBACK_DEF( FT_Error ) + tt_face_load_sfnt_header_stub( TT_Face face, + FT_Stream stream, + FT_Long face_index, + SFNT_Header header ) + { + FT_UNUSED( face ); + FT_UNUSED( stream ); + FT_UNUSED( face_index ); + FT_UNUSED( header ); + + return FT_Err_Unimplemented_Feature; + } + + + FT_CALLBACK_DEF( FT_Error ) + tt_face_load_directory_stub( TT_Face face, + FT_Stream stream, + SFNT_Header header ) + { + FT_UNUSED( face ); + FT_UNUSED( stream ); + FT_UNUSED( header ); + + return FT_Err_Unimplemented_Feature; + } + + + FT_CALLBACK_DEF( FT_Error ) + tt_face_load_hdmx_stub( TT_Face face, + FT_Stream stream ) + { + FT_UNUSED( face ); + FT_UNUSED( stream ); + + return FT_Err_Unimplemented_Feature; + } + + + FT_CALLBACK_DEF( void ) + tt_face_free_hdmx_stub( TT_Face face ) + { + FT_UNUSED( face ); + } + + + FT_CALLBACK_DEF( FT_Error ) + tt_face_set_sbit_strike_stub( TT_Face face, + FT_UInt x_ppem, + FT_UInt y_ppem, + FT_ULong* astrike_index ) + { + /* + * We simply forge a FT_Size_Request and call the real function + * that does all the work. + * + * This stub might be called by libXfont in the X.Org Xserver, + * compiled against version 2.1.8 or newer. + */ + + FT_Size_RequestRec req; + + + req.type = FT_SIZE_REQUEST_TYPE_NOMINAL; + req.width = (FT_F26Dot6)x_ppem; + req.height = (FT_F26Dot6)y_ppem; + req.horiResolution = 0; + req.vertResolution = 0; + + *astrike_index = 0x7FFFFFFFUL; + + return tt_face_set_sbit_strike( face, &req, astrike_index ); + } + + + FT_CALLBACK_DEF( FT_Error ) + tt_face_load_sbit_stub( TT_Face face, + FT_Stream stream ) + { + FT_UNUSED( face ); + FT_UNUSED( stream ); + + /* + * This function was originally implemented to load the sbit table. + * However, it has been replaced by `tt_face_load_eblc', and this stub + * is only there for some rogue clients which would want to call it + * directly (which doesn't make much sense). + */ + return FT_Err_Unimplemented_Feature; + } + + + FT_CALLBACK_DEF( void ) + tt_face_free_sbit_stub( TT_Face face ) + { + /* nothing to do in this stub */ + FT_UNUSED( face ); + } + + + FT_CALLBACK_DEF( FT_Error ) + tt_face_load_charmap_stub( TT_Face face, + void* cmap, + FT_Stream input ) + { + FT_UNUSED( face ); + FT_UNUSED( cmap ); + FT_UNUSED( input ); + + return FT_Err_Unimplemented_Feature; + } + + + FT_CALLBACK_DEF( FT_Error ) + tt_face_free_charmap_stub( TT_Face face, + void* cmap ) + { + FT_UNUSED( face ); + FT_UNUSED( cmap ); + + return 0; + } + +#endif /* FT_CONFIG_OPTION_OLD_INTERNALS */ + + + 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, + +#ifdef FT_CONFIG_OPTION_OLD_INTERNALS + tt_face_load_sfnt_header_stub, + tt_face_load_directory_stub, +#endif + + tt_face_load_head, + tt_face_load_hhea, + tt_face_load_cmap, + tt_face_load_maxp, + tt_face_load_os2, + tt_face_load_post, + + tt_face_load_name, + tt_face_free_name, + +#ifdef FT_CONFIG_OPTION_OLD_INTERNALS + tt_face_load_hdmx_stub, + tt_face_free_hdmx_stub, +#endif + + tt_face_load_kern, + tt_face_load_gasp, + tt_face_load_pclt, + +#ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS + /* see `ttload.h' */ + tt_face_load_bhed, +#else + 0, +#endif + +#ifdef FT_CONFIG_OPTION_OLD_INTERNALS + tt_face_set_sbit_strike_stub, + tt_face_load_sbit_stub, + + tt_find_sbit_image, + tt_load_sbit_metrics, +#endif + +#ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS + tt_face_load_sbit_image, +#else + 0, +#endif + +#ifdef FT_CONFIG_OPTION_OLD_INTERNALS + tt_face_free_sbit_stub, +#endif + +#ifdef TT_CONFIG_OPTION_POSTSCRIPT_NAMES + /* see `ttpost.h' */ + tt_face_get_ps_name, + tt_face_free_ps_names, +#else + 0, + 0, +#endif + +#ifdef FT_CONFIG_OPTION_OLD_INTERNALS + tt_face_load_charmap_stub, + tt_face_free_charmap_stub, +#endif + + /* since version 2.1.8 */ + + tt_face_get_kerning, + + /* since version 2.2 */ + + tt_face_load_font_dir, + tt_face_load_hmtx, + +#ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS + /* see `ttsbit.h' and `sfnt.h' */ + tt_face_load_eblc, + tt_face_free_eblc, + + tt_face_set_sbit_strike, + tt_face_load_strike_metrics, +#else + 0, + 0, + 0, + 0, +#endif + + tt_face_get_metrics + }; + + + 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 */ |