00001 /***************************************************************************/ 00002 /* */ 00003 /* gxvmorx0.c */ 00004 /* */ 00005 /* TrueTypeGX/AAT morx table validation */ 00006 /* body for type0 (Indic Script Rearrangement) subtable. */ 00007 /* */ 00008 /* Copyright 2005 by suzuki toshiya, Masatake YAMATO, Red Hat K.K., */ 00009 /* David Turner, Robert Wilhelm, and Werner Lemberg. */ 00010 /* */ 00011 /* This file is part of the FreeType project, and may only be used, */ 00012 /* modified, and distributed under the terms of the FreeType project */ 00013 /* license, LICENSE.TXT. By continuing to use, modify, or distribute */ 00014 /* this file you indicate that you have read the license and */ 00015 /* understand and accept it fully. */ 00016 /* */ 00017 /***************************************************************************/ 00018 00019 /***************************************************************************/ 00020 /* */ 00021 /* gxvalid is derived from both gxlayout module and otvalid module. */ 00022 /* Development of gxlayout is supported by the Information-technology */ 00023 /* Promotion Agency(IPA), Japan. */ 00024 /* */ 00025 /***************************************************************************/ 00026 00027 00028 #include "gxvmorx.h" 00029 00030 00031 /*************************************************************************/ 00032 /* */ 00033 /* The macro FT_COMPONENT is used in trace mode. It is an implicit */ 00034 /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */ 00035 /* messages during execution. */ 00036 /* */ 00037 #undef FT_COMPONENT 00038 #define FT_COMPONENT trace_gxvmorx 00039 00040 00041 static void 00042 gxv_morx_subtable_type0_entry_validate( 00043 FT_UShort state, 00044 FT_UShort flags, 00045 GXV_XStateTable_GlyphOffsetCPtr glyphOffset_p, 00046 FT_Bytes table, 00047 FT_Bytes limit, 00048 GXV_Validator valid ) 00049 { 00050 FT_UShort markFirst; 00051 FT_UShort dontAdvance; 00052 FT_UShort markLast; 00053 FT_UShort reserved; 00054 FT_UShort verb; 00055 00056 FT_UNUSED( state ); 00057 FT_UNUSED( glyphOffset_p ); 00058 FT_UNUSED( table ); 00059 FT_UNUSED( limit ); 00060 00061 00062 markFirst = (FT_UShort)( ( flags >> 15 ) & 1 ); 00063 dontAdvance = (FT_UShort)( ( flags >> 14 ) & 1 ); 00064 markLast = (FT_UShort)( ( flags >> 13 ) & 1 ); 00065 00066 reserved = (FT_UShort)( flags & 0x1FF0 ); 00067 verb = (FT_UShort)( flags & 0x000F ); 00068 00069 if ( 0 < reserved ) 00070 { 00071 GXV_TRACE(( " non-zero bits found in reserved range\n" )); 00072 FT_INVALID_DATA; 00073 } 00074 } 00075 00076 00077 FT_LOCAL_DEF( void ) 00078 gxv_morx_subtable_type0_validate( FT_Bytes table, 00079 FT_Bytes limit, 00080 GXV_Validator valid ) 00081 { 00082 FT_Bytes p = table; 00083 00084 00085 GXV_NAME_ENTER( 00086 "morx chain subtable type0 (Indic-Script Rearrangement)" ); 00087 00088 GXV_LIMIT_CHECK( GXV_STATETABLE_HEADER_SIZE ); 00089 00090 valid->xstatetable.optdata = NULL; 00091 valid->xstatetable.optdata_load_func = NULL; 00092 valid->xstatetable.subtable_setup_func = NULL; 00093 valid->xstatetable.entry_glyphoffset_fmt = GXV_GLYPHOFFSET_NONE; 00094 valid->xstatetable.entry_validate_func = 00095 gxv_morx_subtable_type0_entry_validate; 00096 00097 gxv_XStateTable_validate( p, limit, valid ); 00098 00099 GXV_EXIT; 00100 } 00101 00102 00103 /* END */
1.5.1