FT_COMPONENT tt_face_done_loca tt_face_free_hdmx tt_face_get_device_metrics tt_face_get_location tt_face_load_cvt tt_face_load_fpgm tt_face_load_hdmx tt_face_load_loca tt_face_load_prep

tt_face_get_location ( TT_Face  face, FT_UInt  gindex, FT_UInt *  asize  ) Definition at line 172 of file ttpload.c. Referenced by load_truetype_glyph(). { FT_ULong pos1, pos2; FT_Byte* p; FT_Byte* p_limit; pos1 = pos2 = 0; if ( gindex < face->num_locations ) { if ( face->header.Index_To_Loc_Format != 0 ) { p = face->glyph_locations + gindex * 4; p_limit = face->glyph_locations + face->num_locations * 4; pos1 = FT_NEXT_ULONG( p ); pos2 = pos1; if ( p + 4 <= p_limit ) pos2 = FT_NEXT_ULONG( p ); } else { p = face->glyph_locations + gindex * 2; p_limit = face->glyph_locations + face->num_locations * 2; pos1 = FT_NEXT_USHORT( p ); pos2 = pos1; if ( p + 2 <= p_limit ) pos2 = FT_NEXT_USHORT( p ); pos1 <<= 1; pos2 <<= 1; } } /* Check broken location data */ if ( pos1 >= face->glyf_len ) { FT_TRACE1(( "tt_face_get_location:" " too large offset=0x%08lx found for gid=0x%04lx," " exceeding the end of glyf table (0x%08lx)\n", pos1, gindex, face->glyf_len )); *asize = 0; return 0; } if ( pos2 >= face->glyf_len ) { FT_TRACE1(( "tt_face_get_location:" " too large offset=0x%08lx found for gid=0x%04lx," " truncate at the end of glyf table (0x%08lx)\n", pos2, gindex + 1, face->glyf_len )); pos2 = face->glyf_len; } /* The `loca' table must be ordered; it refers to the length of */ /* an entry as the difference between the current and the next */ /* position. However, there do exist (malformed) fonts which */ /* don't obey this rule, so we are only able to provide an */ /* upper bound for the size. */ /* */ /* We get (intentionally) a wrong, non-zero result in case the */ /* `glyf' table is missing. */ if ( pos2 >= pos1 ) *asize = (FT_UInt)( pos2 - pos1 ); else *asize = (FT_UInt)( face->glyf_len - pos1 ); return pos1; }