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/***************************************************************************/
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/* OpenType font driver implementation (body). */
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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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/* 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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#include FT_FREETYPE_H
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#include FT_INTERNAL_DEBUG_H
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#include FT_INTERNAL_STREAM_H
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#include FT_INTERNAL_SFNT_H
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#include FT_TRUETYPE_IDS_H
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#include FT_SERVICE_POSTSCRIPT_CMAPS_H
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#include FT_SERVICE_POSTSCRIPT_INFO_H
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#include FT_SERVICE_TT_CMAP_H
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#include FT_SERVICE_XFREE86_NAME_H
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#include FT_SERVICE_GLYPH_DICT_H
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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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#define FT_COMPONENT trace_cffdriver
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/*************************************************************************/
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/*************************************************************************/
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/*************************************************************************/
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/*************************************************************************/
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/*************************************************************************/
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/*************************************************************************/
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#define PAIR_TAG( left, right ) ( ( (FT_ULong)left << 16 ) | \
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/*************************************************************************/
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/* A driver method used to return the kerning vector between two */
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/* glyphs of the same face. */
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/* face :: A handle to the source face object. */
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/* left_glyph :: The index of the left glyph in the kern pair. */
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/* right_glyph :: The index of the right glyph in the kern pair. */
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/* kerning :: The kerning vector. This is in font units for */
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/* scalable formats, and in pixels for fixed-sizes */
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/* FreeType error code. 0 means success. */
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/* Only horizontal layouts (left-to-right & right-to-left) are */
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/* supported by this function. Other layouts, or more sophisticated */
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/* kernings, are out of scope of this method (the basic driver */
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/* interface is meant to be simple). */
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/* They can be implemented by format-specific interfaces. */
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FT_CALLBACK_DEF( FT_Error )
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Get_Kerning( FT_Face ttface, /* TT_Face */
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TT_Face face = (TT_Face)ttface;
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return CFF_Err_Invalid_Face_Handle;
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if ( face->kern_pairs )
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/* there are some kerning pairs in this font file! */
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FT_ULong search_tag = PAIR_TAG( left_glyph, right_glyph );
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right = face->num_kern_pairs - 1;
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while ( left <= right )
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FT_Long middle = left + ( ( right - left ) >> 1 );
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pair = face->kern_pairs + middle;
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cur_pair = PAIR_TAG( pair->left, pair->right );
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if ( cur_pair == search_tag )
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if ( cur_pair < search_tag )
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kerning->x = pair->value;
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/*************************************************************************/
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/* A driver method used to load a glyph within a given glyph slot. */
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/* slot :: A handle to the target slot object where the glyph */
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/* will be loaded. */
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/* size :: A handle to the source face size at which the glyph */
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/* must be scaled, loaded, etc. */
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/* glyph_index :: The index of the glyph in the font file. */
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/* load_flags :: A flag indicating what to load for this glyph. The */
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/* FT_LOAD_??? constants can be used to control the */
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/* glyph loading process (e.g., whether the outline */
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/* should be scaled, whether to load bitmaps or not, */
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/* whether to hint the outline, etc). */
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/* FreeType error code. 0 means success. */
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FT_CALLBACK_DEF( FT_Error )
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Load_Glyph( FT_GlyphSlot cffslot, /* CFF_GlyphSlot */
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FT_Size cffsize, /* CFF_Size */
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FT_Int32 load_flags )
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CFF_GlyphSlot slot = (CFF_GlyphSlot)cffslot;
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CFF_Size size = (CFF_Size)cffsize;
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return CFF_Err_Invalid_Slot_Handle;
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/* check whether we want a scaled outline or bitmap */
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load_flags |= FT_LOAD_NO_SCALE | FT_LOAD_NO_HINTING;
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if ( load_flags & FT_LOAD_NO_SCALE )
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/* reset the size object if necessary */
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/* these two objects must have the same parent */
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if ( cffsize->face != cffslot->face )
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return CFF_Err_Invalid_Face_Handle;
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/* now load the glyph outline if necessary */
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error = cff_slot_load( slot, size, glyph_index, load_flags );
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/* force drop-out mode to 2 - irrelevant now */
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/* slot->outline.dropout_mode = 2; */
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cff_get_glyph_name( CFF_Face face,
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CFF_Font font = (CFF_Font)face->extra.data;
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FT_Memory memory = FT_FACE_MEMORY( face );
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FT_Service_PsCMaps psnames;
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FT_FACE_FIND_GLOBAL_SERVICE( face, psnames, POSTSCRIPT_CMAPS );
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FT_ERROR(( "cff_get_glyph_name:" ));
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FT_ERROR(( " cannot get glyph name from CFF & CEF fonts\n" ));
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FT_ERROR(( " without the `PSNames' module\n" ));
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error = CFF_Err_Unknown_File_Format;
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/* first, locate the sid in the charset table */
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sid = font->charset.sids[glyph_index];
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/* now, lookup the name itself */
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gname = cff_index_get_sid_string( &font->string_index, sid, psnames );
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if ( gname && buffer_max > 0 )
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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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cff_get_name_index( CFF_Face face,
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FT_String* glyph_name )
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FT_Service_PsCMaps psnames;
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FT_Memory memory = FT_FACE_MEMORY( face );
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cff = (CFF_FontRec *)face->extra.data;
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charset = &cff->charset;
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FT_FACE_FIND_GLOBAL_SERVICE( face, psnames, POSTSCRIPT_CMAPS );
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for ( i = 0; i < cff->num_glyphs; i++ )
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sid = charset->sids[i];
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name = cff_index_get_name( &cff->string_index, sid - 391 );
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name = (FT_String *)psnames->adobe_std_strings( sid );
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result = ft_strcmp( glyph_name, name );
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static const FT_Service_GlyphDictRec cff_service_glyph_dict =
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(FT_GlyphDict_GetNameFunc) cff_get_glyph_name,
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(FT_GlyphDict_NameIndexFunc)cff_get_name_index,
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* POSTSCRIPT INFO SERVICE
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cff_ps_has_glyph_names( FT_Face face )
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return ( face->face_flags & FT_FACE_FLAG_GLYPH_NAMES ) > 0;
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static const FT_Service_PsInfoRec cff_service_ps_info =
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(PS_GetFontInfoFunc) NULL, /* unsupported with CFF fonts */
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(PS_HasGlyphNamesFunc)cff_ps_has_glyph_names
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* If the charmap is a synthetic Unicode encoding cmap or
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* a Type 1 standard (or expert) encoding cmap, hide TT CMAP INFO
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* service defined in SFNT module.
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* Otherwise call the service function in the sfnt module.
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cff_get_cmap_info( FT_CharMap charmap,
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TT_CMapInfo *cmap_info )
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FT_CMap cmap = FT_CMAP( charmap );
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FT_Error error = CFF_Err_Ok;
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cmap_info->language = 0;
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if ( cmap->clazz != &cff_cmap_encoding_class_rec &&
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cmap->clazz != &cff_cmap_unicode_class_rec )
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FT_Face face = FT_CMAP_FACE( cmap );
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FT_Library library = FT_FACE_LIBRARY( face );
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FT_Module sfnt = FT_Get_Module( library, "sfnt" );
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FT_Service_TTCMaps service =
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(FT_Service_TTCMaps)ft_module_get_service( sfnt,
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FT_SERVICE_ID_TT_CMAP );
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if ( service && service->get_cmap_info )
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error = service->get_cmap_info( charmap, cmap_info );
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static const FT_Service_TTCMapsRec cff_service_get_cmap_info =
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(TT_CMap_Info_GetFunc)cff_get_cmap_info
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/*************************************************************************/
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/*************************************************************************/
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/*************************************************************************/
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/**** D R I V E R I N T E R F A C E ****/
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/*************************************************************************/
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/*************************************************************************/
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/*************************************************************************/
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static const FT_ServiceDescRec cff_services[] =
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{ FT_SERVICE_ID_XF86_NAME, FT_XF86_FORMAT_CFF },
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{ FT_SERVICE_ID_POSTSCRIPT_INFO, &cff_service_ps_info },
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#ifndef FT_CONFIG_OPTION_NO_GLYPH_NAMES
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{ FT_SERVICE_ID_GLYPH_DICT, &cff_service_glyph_dict },
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{ FT_SERVICE_ID_TT_CMAP, &cff_service_get_cmap_info },
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FT_CALLBACK_DEF( FT_Module_Interface )
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cff_get_interface( FT_Module driver, /* CFF_Driver */
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const char* module_interface )
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FT_Module_Interface result;
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result = ft_service_list_lookup( cff_services, module_interface );
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if ( result != NULL )
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/* we pass our request to the `sfnt' module */
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sfnt = FT_Get_Module( driver->library, "sfnt" );
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return sfnt ? sfnt->clazz->get_interface( sfnt, module_interface ) : 0;
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/* The FT_DriverInterface structure is defined in ftdriver.h. */
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FT_CALLBACK_TABLE_DEF
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const FT_Driver_ClassRec cff_driver_class =
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/* begin with the FT_Module_Class fields */
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FT_MODULE_FONT_DRIVER |
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FT_MODULE_DRIVER_SCALABLE |
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FT_MODULE_DRIVER_HAS_HINTER,
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sizeof( CFF_DriverRec ),
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0, /* module-specific interface */
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/* now the specific driver fields */
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sizeof( TT_FaceRec ),
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sizeof( CFF_SizeRec ),
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sizeof( CFF_GlyphSlotRec ),
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cff_point_size_reset,
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0, /* FT_Face_AttachFunc */
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0 /* FT_Face_GetAdvancesFunc */