652 lines
17 KiB
C
652 lines
17 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, 2005, 2006, 2007, 2009, 2010 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_DEBUG_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 "sfntpic.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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#ifdef TT_CONFIG_OPTION_BDF
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#include "ttbdf.h"
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#include FT_SERVICE_BDF_H
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#endif
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#include "ttcmap.h"
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#include "ttkern.h"
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#include "ttmtx.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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/* */
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/* The macro FT_COMPONENT is used in trace mode. It is an implicit */
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/* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */
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/* messages during execution. */
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/* */
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#undef FT_COMPONENT
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#define FT_COMPONENT trace_sfdriver
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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 *offset,
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FT_ULong *length )
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{
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if ( !tag || !offset || !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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*offset = face->dir_tables[idx].Offset;
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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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FT_DEFINE_SERVICE_SFNT_TABLEREC(sfnt_service_sfnt_table,
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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 )
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FT_STRCPYN( buffer, gname, buffer_max );
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return error;
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}
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static FT_UInt
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sfnt_get_name_index( TT_Face face,
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FT_String* glyph_name )
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{
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FT_Face root = &face->root;
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FT_UInt i, max_gid = FT_UINT_MAX;
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if ( root->num_glyphs < 0 )
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return 0;
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else if ( ( FT_ULong ) root->num_glyphs < FT_UINT_MAX )
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max_gid = ( FT_UInt ) root->num_glyphs;
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else
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FT_TRACE0(( "Ignore glyph names for invalid GID 0x%08x - 0x%08x\n",
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FT_UINT_MAX, root->num_glyphs ));
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for ( i = 0; i < max_gid; i++ )
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{
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FT_String* gname;
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FT_Error error = tt_face_get_ps_name( face, i, &gname );
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if ( error )
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continue;
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if ( !ft_strcmp( glyph_name, gname ) )
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return i;
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}
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return 0;
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}
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FT_DEFINE_SERVICE_GLYPHDICTREC(sfnt_service_glyph_dict,
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(FT_GlyphDict_GetNameFunc) sfnt_get_glyph_name,
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(FT_GlyphDict_NameIndexFunc)sfnt_get_name_index
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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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FT_DEFINE_SERVICE_PSFONTNAMEREC(sfnt_service_ps_name,
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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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FT_DEFINE_SERVICE_TTCMAPSREC(tt_service_get_cmap_info,
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(TT_CMap_Info_GetFunc)tt_get_cmap_info
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)
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#ifdef TT_CONFIG_OPTION_BDF
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static FT_Error
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sfnt_get_charset_id( TT_Face face,
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const char* *acharset_encoding,
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const char* *acharset_registry )
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{
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BDF_PropertyRec encoding, registry;
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FT_Error error;
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/* XXX: I don't know whether this is correct, since
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* tt_face_find_bdf_prop only returns something correct if we have
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* previously selected a size that is listed in the BDF table.
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* Should we change the BDF table format to include single offsets
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* for `CHARSET_REGISTRY' and `CHARSET_ENCODING'?
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*/
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error = tt_face_find_bdf_prop( face, "CHARSET_REGISTRY", ®istry );
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if ( !error )
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{
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error = tt_face_find_bdf_prop( face, "CHARSET_ENCODING", &encoding );
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if ( !error )
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{
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if ( registry.type == BDF_PROPERTY_TYPE_ATOM &&
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encoding.type == BDF_PROPERTY_TYPE_ATOM )
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{
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*acharset_encoding = encoding.u.atom;
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*acharset_registry = registry.u.atom;
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}
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else
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error = SFNT_Err_Invalid_Argument;
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}
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}
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return error;
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}
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FT_DEFINE_SERVICE_BDFRec(sfnt_service_bdf,
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(FT_BDF_GetCharsetIdFunc) sfnt_get_charset_id,
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(FT_BDF_GetPropertyFunc) tt_face_find_bdf_prop
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)
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#endif /* TT_CONFIG_OPTION_BDF */
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/*
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* SERVICE LIST
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*/
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#if defined TT_CONFIG_OPTION_POSTSCRIPT_NAMES && defined TT_CONFIG_OPTION_BDF
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FT_DEFINE_SERVICEDESCREC5(sfnt_services,
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FT_SERVICE_ID_SFNT_TABLE, &FT_SFNT_SERVICE_SFNT_TABLE_GET,
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FT_SERVICE_ID_POSTSCRIPT_FONT_NAME, &FT_SFNT_SERVICE_PS_NAME_GET,
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FT_SERVICE_ID_GLYPH_DICT, &FT_SFNT_SERVICE_GLYPH_DICT_GET,
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FT_SERVICE_ID_BDF, &FT_SFNT_SERVICE_BDF_GET,
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FT_SERVICE_ID_TT_CMAP, &FT_TT_SERVICE_GET_CMAP_INFO_GET
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)
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#elif defined TT_CONFIG_OPTION_POSTSCRIPT_NAMES
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FT_DEFINE_SERVICEDESCREC4(sfnt_services,
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FT_SERVICE_ID_SFNT_TABLE, &FT_SFNT_SERVICE_SFNT_TABLE_GET,
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FT_SERVICE_ID_POSTSCRIPT_FONT_NAME, &FT_SFNT_SERVICE_PS_NAME_GET,
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FT_SERVICE_ID_GLYPH_DICT, &FT_SFNT_SERVICE_GLYPH_DICT_GET,
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FT_SERVICE_ID_TT_CMAP, &FT_TT_SERVICE_GET_CMAP_INFO_GET
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)
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#elif defined TT_CONFIG_OPTION_BDF
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FT_DEFINE_SERVICEDESCREC4(sfnt_services,
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FT_SERVICE_ID_SFNT_TABLE, &FT_SFNT_SERVICE_SFNT_TABLE_GET,
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FT_SERVICE_ID_POSTSCRIPT_FONT_NAME, &FT_SFNT_SERVICE_PS_NAME_GET,
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FT_SERVICE_ID_BDF, &FT_SFNT_SERVICE_BDF_GET,
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FT_SERVICE_ID_TT_CMAP, &FT_TT_SERVICE_GET_CMAP_INFO_GET
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)
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#else
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FT_DEFINE_SERVICEDESCREC3(sfnt_services,
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FT_SERVICE_ID_SFNT_TABLE, &FT_SFNT_SERVICE_SFNT_TABLE_GET,
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FT_SERVICE_ID_POSTSCRIPT_FONT_NAME, &FT_SFNT_SERVICE_PS_NAME_GET,
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FT_SERVICE_ID_TT_CMAP, &FT_TT_SERVICE_GET_CMAP_INFO_GET
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)
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#endif
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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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return ft_service_list_lookup( FT_SFNT_SERVICES_GET, module_interface );
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}
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#ifdef FT_CONFIG_OPTION_OLD_INTERNALS
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FT_CALLBACK_DEF( FT_Error )
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tt_face_load_sfnt_header_stub( TT_Face face,
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FT_Stream stream,
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FT_Long face_index,
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SFNT_Header header )
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{
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FT_UNUSED( face );
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FT_UNUSED( stream );
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FT_UNUSED( face_index );
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FT_UNUSED( header );
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return SFNT_Err_Unimplemented_Feature;
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}
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FT_CALLBACK_DEF( FT_Error )
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tt_face_load_directory_stub( TT_Face face,
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FT_Stream stream,
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SFNT_Header header )
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{
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FT_UNUSED( face );
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FT_UNUSED( stream );
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FT_UNUSED( header );
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return SFNT_Err_Unimplemented_Feature;
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}
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FT_CALLBACK_DEF( FT_Error )
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tt_face_load_hdmx_stub( TT_Face face,
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FT_Stream stream )
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{
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FT_UNUSED( face );
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FT_UNUSED( stream );
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return SFNT_Err_Unimplemented_Feature;
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}
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FT_CALLBACK_DEF( void )
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tt_face_free_hdmx_stub( TT_Face face )
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{
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FT_UNUSED( face );
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}
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FT_CALLBACK_DEF( FT_Error )
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tt_face_set_sbit_strike_stub( TT_Face face,
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FT_UInt x_ppem,
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FT_UInt y_ppem,
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FT_ULong* astrike_index )
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{
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/*
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* We simply forge a FT_Size_Request and call the real function
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* that does all the work.
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*
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* This stub might be called by libXfont in the X.Org Xserver,
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* compiled against version 2.1.8 or newer.
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*/
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FT_Size_RequestRec req;
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req.type = FT_SIZE_REQUEST_TYPE_NOMINAL;
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req.width = (FT_F26Dot6)x_ppem;
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req.height = (FT_F26Dot6)y_ppem;
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req.horiResolution = 0;
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req.vertResolution = 0;
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*astrike_index = 0x7FFFFFFFUL;
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return tt_face_set_sbit_strike( face, &req, astrike_index );
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}
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FT_CALLBACK_DEF( FT_Error )
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tt_face_load_sbit_stub( TT_Face face,
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FT_Stream stream )
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{
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FT_UNUSED( face );
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FT_UNUSED( stream );
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/*
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* This function was originally implemented to load the sbit table.
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* However, it has been replaced by `tt_face_load_eblc', and this stub
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* is only there for some rogue clients which would want to call it
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* directly (which doesn't make much sense).
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*/
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return SFNT_Err_Unimplemented_Feature;
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}
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FT_CALLBACK_DEF( void )
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tt_face_free_sbit_stub( TT_Face face )
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{
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/* nothing to do in this stub */
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FT_UNUSED( face );
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}
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FT_CALLBACK_DEF( FT_Error )
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tt_face_load_charmap_stub( TT_Face face,
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void* cmap,
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FT_Stream input )
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{
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FT_UNUSED( face );
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FT_UNUSED( cmap );
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FT_UNUSED( input );
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return SFNT_Err_Unimplemented_Feature;
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}
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FT_CALLBACK_DEF( FT_Error )
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tt_face_free_charmap_stub( TT_Face face,
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void* cmap )
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{
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FT_UNUSED( face );
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FT_UNUSED( cmap );
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return SFNT_Err_Ok;
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}
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#endif /* FT_CONFIG_OPTION_OLD_INTERNALS */
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#ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS
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#define PUT_EMBEDDED_BITMAPS(a) a
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#else
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#define PUT_EMBEDDED_BITMAPS(a) 0
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#endif
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#ifdef TT_CONFIG_OPTION_POSTSCRIPT_NAMES
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#define PUT_PS_NAMES(a) a
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#else
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#define PUT_PS_NAMES(a) 0
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#endif
|
|
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FT_DEFINE_SFNT_INTERFACE(sfnt_interface,
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tt_face_goto_table,
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|
|
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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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|
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|
tt_face_load_any,
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|
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tt_face_load_sfnt_header_stub, /* FT_CONFIG_OPTION_OLD_INTERNALS */
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|
tt_face_load_directory_stub, /* FT_CONFIG_OPTION_OLD_INTERNALS */
|
|
|
|
tt_face_load_head,
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|
tt_face_load_hhea,
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|
tt_face_load_cmap,
|
|
tt_face_load_maxp,
|
|
tt_face_load_os2,
|
|
tt_face_load_post,
|
|
|
|
tt_face_load_name,
|
|
tt_face_free_name,
|
|
|
|
tt_face_load_hdmx_stub, /* FT_CONFIG_OPTION_OLD_INTERNALS */
|
|
tt_face_free_hdmx_stub, /* FT_CONFIG_OPTION_OLD_INTERNALS */
|
|
|
|
tt_face_load_kern,
|
|
tt_face_load_gasp,
|
|
tt_face_load_pclt,
|
|
|
|
/* see `ttload.h' */
|
|
PUT_EMBEDDED_BITMAPS(tt_face_load_bhed),
|
|
|
|
tt_face_set_sbit_strike_stub, /* FT_CONFIG_OPTION_OLD_INTERNALS */
|
|
tt_face_load_sbit_stub, /* FT_CONFIG_OPTION_OLD_INTERNALS */
|
|
|
|
tt_find_sbit_image, /* FT_CONFIG_OPTION_OLD_INTERNALS */
|
|
tt_load_sbit_metrics, /* FT_CONFIG_OPTION_OLD_INTERNALS */
|
|
|
|
PUT_EMBEDDED_BITMAPS(tt_face_load_sbit_image),
|
|
|
|
tt_face_free_sbit_stub, /* FT_CONFIG_OPTION_OLD_INTERNALS */
|
|
|
|
/* see `ttpost.h' */
|
|
PUT_PS_NAMES(tt_face_get_ps_name),
|
|
PUT_PS_NAMES(tt_face_free_ps_names),
|
|
|
|
tt_face_load_charmap_stub, /* FT_CONFIG_OPTION_OLD_INTERNALS */
|
|
tt_face_free_charmap_stub, /* FT_CONFIG_OPTION_OLD_INTERNALS */
|
|
|
|
/* since version 2.1.8 */
|
|
|
|
tt_face_get_kerning,
|
|
|
|
/* since version 2.2 */
|
|
|
|
tt_face_load_font_dir,
|
|
tt_face_load_hmtx,
|
|
|
|
/* see `ttsbit.h' and `sfnt.h' */
|
|
PUT_EMBEDDED_BITMAPS(tt_face_load_eblc),
|
|
PUT_EMBEDDED_BITMAPS(tt_face_free_eblc),
|
|
|
|
PUT_EMBEDDED_BITMAPS(tt_face_set_sbit_strike),
|
|
PUT_EMBEDDED_BITMAPS(tt_face_load_strike_metrics),
|
|
|
|
tt_face_get_metrics
|
|
)
|
|
|
|
|
|
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*)&FT_SFNT_INTERFACE_GET, /* module specific interface */
|
|
|
|
(FT_Module_Constructor)0,
|
|
(FT_Module_Destructor) 0,
|
|
(FT_Module_Requester) sfnt_get_interface
|
|
)
|
|
|
|
|
|
/* END */
|