424 lines
9.6 KiB
C
424 lines
9.6 KiB
C
/***************************************************************************/
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/* */
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/* sfdriver.c */
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/* */
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/* High-level SFNT driver interface (body). */
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/* */
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/* Copyright 1996-2001, 2002, 2003, 2004 by */
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/* David Turner, Robert Wilhelm, and Werner Lemberg. */
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/* */
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/* This file is part of the FreeType project, and may only be used, */
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/* modified, and distributed under the terms of the FreeType project */
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/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
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/* this file you indicate that you have read the license and */
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/* understand and accept it fully. */
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/* */
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/***************************************************************************/
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#include <ft2build.h>
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#include FT_INTERNAL_SFNT_H
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#include FT_INTERNAL_OBJECTS_H
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#include "sfdriver.h"
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#include "ttload.h"
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#include "sfobjs.h"
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#include "sferrors.h"
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#ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS
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#include "ttsbit.h"
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#endif
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#ifdef TT_CONFIG_OPTION_POSTSCRIPT_NAMES
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#include "ttpost.h"
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#endif
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#include "ttcmap.h"
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#include FT_SERVICE_GLYPH_DICT_H
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#include FT_SERVICE_POSTSCRIPT_NAME_H
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#include FT_SERVICE_SFNT_H
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#include FT_SERVICE_TT_CMAP_H
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/*
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* SFNT TABLE SERVICE
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*
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*/
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static void*
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get_sfnt_table( TT_Face face,
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FT_Sfnt_Tag tag )
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{
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void* table;
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switch ( tag )
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{
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case ft_sfnt_head:
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table = &face->header;
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break;
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case ft_sfnt_hhea:
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table = &face->horizontal;
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break;
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case ft_sfnt_vhea:
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table = face->vertical_info ? &face->vertical : 0;
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break;
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case ft_sfnt_os2:
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table = face->os2.version == 0xFFFFU ? 0 : &face->os2;
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break;
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case ft_sfnt_post:
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table = &face->postscript;
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break;
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case ft_sfnt_maxp:
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table = &face->max_profile;
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break;
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case ft_sfnt_pclt:
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table = face->pclt.Version ? &face->pclt : 0;
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break;
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default:
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table = 0;
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}
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return table;
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}
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static FT_Error
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sfnt_table_info( TT_Face face,
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FT_UInt idx,
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FT_ULong *tag,
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FT_ULong *length )
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{
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if ( !tag || !length )
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return SFNT_Err_Invalid_Argument;
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if ( idx >= face->num_tables )
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return SFNT_Err_Table_Missing;
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*tag = face->dir_tables[idx].Tag;
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*length = face->dir_tables[idx].Length;
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return SFNT_Err_Ok;
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}
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static const FT_Service_SFNT_TableRec sfnt_service_sfnt_table =
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{
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(FT_SFNT_TableLoadFunc)tt_face_load_any,
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(FT_SFNT_TableGetFunc) get_sfnt_table,
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(FT_SFNT_TableInfoFunc)sfnt_table_info
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};
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#ifdef TT_CONFIG_OPTION_POSTSCRIPT_NAMES
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/*
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* GLYPH DICT SERVICE
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*
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*/
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static FT_Error
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sfnt_get_glyph_name( TT_Face face,
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FT_UInt glyph_index,
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FT_Pointer buffer,
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FT_UInt buffer_max )
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{
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FT_String* gname;
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FT_Error error;
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error = tt_face_get_ps_name( face, glyph_index, &gname );
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if ( !error && buffer_max > 0 )
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{
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FT_UInt len = (FT_UInt)( ft_strlen( gname ) );
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if ( len >= buffer_max )
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len = buffer_max - 1;
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FT_MEM_COPY( buffer, gname, len );
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((FT_Byte*)buffer)[len] = 0;
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}
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return error;
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}
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static const FT_Service_GlyphDictRec sfnt_service_glyph_dict =
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{
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(FT_GlyphDict_GetNameFunc) sfnt_get_glyph_name,
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(FT_GlyphDict_NameIndexFunc)NULL
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};
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#endif /* TT_CONFIG_OPTION_POSTSCRIPT_NAMES */
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/*
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* POSTSCRIPT NAME SERVICE
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*
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*/
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static const char*
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sfnt_get_ps_name( TT_Face face )
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{
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FT_Int n, found_win, found_apple;
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const char* result = NULL;
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/* shouldn't happen, but just in case to avoid memory leaks */
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if ( face->postscript_name )
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return face->postscript_name;
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/* scan the name table to see whether we have a Postscript name here, */
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/* either in Macintosh or Windows platform encodings */
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found_win = -1;
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found_apple = -1;
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for ( n = 0; n < face->num_names; n++ )
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{
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TT_NameEntryRec* name = face->name_table.names + n;
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if ( name->nameID == 6 && name->stringLength > 0 )
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{
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if ( name->platformID == 3 &&
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name->encodingID == 1 &&
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name->languageID == 0x409 )
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found_win = n;
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if ( name->platformID == 1 &&
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name->encodingID == 0 &&
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name->languageID == 0 )
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found_apple = n;
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}
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}
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if ( found_win != -1 )
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{
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FT_Memory memory = face->root.memory;
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TT_NameEntryRec* name = face->name_table.names + found_win;
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FT_UInt len = name->stringLength / 2;
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FT_Error error = SFNT_Err_Ok;
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FT_UNUSED( error );
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if ( !FT_ALLOC( result, name->stringLength + 1 ) )
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{
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FT_Stream stream = face->name_table.stream;
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FT_String* r = (FT_String*)result;
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FT_Byte* p = (FT_Byte*)name->string;
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if ( FT_STREAM_SEEK( name->stringOffset ) ||
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FT_FRAME_ENTER( name->stringLength ) )
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{
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FT_FREE( result );
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name->stringLength = 0;
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name->stringOffset = 0;
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FT_FREE( name->string );
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goto Exit;
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}
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p = (FT_Byte*)stream->cursor;
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for ( ; len > 0; len--, p += 2 )
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{
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if ( p[0] == 0 && p[1] >= 32 && p[1] < 128 )
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*r++ = p[1];
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}
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*r = '\0';
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FT_FRAME_EXIT();
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}
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goto Exit;
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}
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if ( found_apple != -1 )
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{
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FT_Memory memory = face->root.memory;
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TT_NameEntryRec* name = face->name_table.names + found_apple;
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FT_UInt len = name->stringLength;
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FT_Error error = SFNT_Err_Ok;
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FT_UNUSED( error );
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if ( !FT_ALLOC( result, len + 1 ) )
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{
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FT_Stream stream = face->name_table.stream;
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if ( FT_STREAM_SEEK( name->stringOffset ) ||
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FT_STREAM_READ( result, len ) )
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{
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name->stringOffset = 0;
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name->stringLength = 0;
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FT_FREE( name->string );
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FT_FREE( result );
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goto Exit;
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}
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((char*)result)[len] = '\0';
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}
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}
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Exit:
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face->postscript_name = result;
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return result;
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}
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static const FT_Service_PsFontNameRec sfnt_service_ps_name =
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{
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(FT_PsName_GetFunc)sfnt_get_ps_name
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};
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/*
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* TT CMAP INFO
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*
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*/
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static const FT_Service_TTCMapsRec tt_service_get_cmap_info =
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{
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(TT_CMap_Info_GetFunc)tt_get_cmap_info
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};
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/*
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* SERVICE LIST
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*
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*/
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static const FT_ServiceDescRec sfnt_services[] =
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{
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{ FT_SERVICE_ID_SFNT_TABLE, &sfnt_service_sfnt_table },
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{ FT_SERVICE_ID_POSTSCRIPT_FONT_NAME, &sfnt_service_ps_name },
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#ifdef TT_CONFIG_OPTION_POSTSCRIPT_NAMES
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{ FT_SERVICE_ID_GLYPH_DICT, &sfnt_service_glyph_dict },
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#endif
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{ FT_SERVICE_ID_TT_CMAP, &tt_service_get_cmap_info },
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{ NULL, NULL }
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};
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FT_CALLBACK_DEF( FT_Module_Interface )
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sfnt_get_interface( FT_Module module,
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const char* module_interface )
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{
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FT_UNUSED( module );
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if ( ft_strcmp( module_interface, "get_sfnt" ) == 0 )
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return (FT_Module_Interface)get_sfnt_table;
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if ( ft_strcmp( module_interface, "load_sfnt" ) == 0 )
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return (FT_Module_Interface)tt_face_load_any;
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return ft_service_list_lookup( sfnt_services, module_interface );
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}
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static
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const SFNT_Interface sfnt_interface =
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{
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tt_face_goto_table,
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sfnt_init_face,
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sfnt_load_face,
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sfnt_done_face,
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sfnt_get_interface,
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tt_face_load_any,
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tt_face_load_sfnt_header,
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tt_face_load_directory,
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tt_face_load_header,
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tt_face_load_metrics_header,
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tt_face_load_cmap,
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tt_face_load_max_profile,
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tt_face_load_os2,
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tt_face_load_postscript,
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tt_face_load_names,
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tt_face_free_names,
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tt_face_load_hdmx,
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tt_face_free_hdmx,
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tt_face_load_kern,
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tt_face_load_gasp,
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tt_face_load_pclt,
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#ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS
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/* see `ttload.h' */
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tt_face_load_bitmap_header,
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/* see `ttsbit.h' and `sfnt.h' */
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tt_face_set_sbit_strike,
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tt_face_load_sbit_strikes,
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tt_find_sbit_image,
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tt_load_sbit_metrics,
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tt_face_load_sbit_image,
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tt_face_free_sbit_strikes,
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#else /* TT_CONFIG_OPTION_EMBEDDED_BITMAPS */
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0,
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0,
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0,
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0,
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0,
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0,
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0,
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#endif /* TT_CONFIG_OPTION_EMBEDDED_BITMAPS */
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#ifdef TT_CONFIG_OPTION_POSTSCRIPT_NAMES
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/* see `ttkern.h' */
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tt_face_get_kerning,
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/* see `ttpost.h' */
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tt_face_get_ps_name,
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tt_face_free_ps_names,
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#else /* TT_CONFIG_OPTION_POSTSCRIPT_NAMES */
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0,
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0,
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#endif /* TT_CONFIG_OPTION_POSTSCRIPT_NAMES */
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};
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FT_CALLBACK_TABLE_DEF
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const FT_Module_Class sfnt_module_class =
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{
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0, /* not a font driver or renderer */
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sizeof( FT_ModuleRec ),
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"sfnt", /* driver name */
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0x10000L, /* driver version 1.0 */
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0x20000L, /* driver requires FreeType 2.0 or higher */
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(const void*)&sfnt_interface, /* module specific interface */
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(FT_Module_Constructor)0,
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(FT_Module_Destructor) 0,
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(FT_Module_Requester) sfnt_get_interface
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};
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/* END */
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