/***************************************************************************/ /* */ /* gxvmort5.c */ /* */ /* TrueTypeGX/AAT mort table validation */ /* body for type5 (Contextual Glyph Insertion) subtable. */ /* */ /* Copyright 2005 by suzuki toshiya, Masatake YAMATO, Red Hat K.K., */ /* David Turner, Robert Wilhelm, and Werner Lemberg. */ /* */ /* This file is part of the FreeType project, and may only be used, */ /* modified, and distributed under the terms of the FreeType project */ /* license, LICENSE.TXT. By continuing to use, modify, or distribute */ /* this file you indicate that you have read the license and */ /* understand and accept it fully. */ /* */ /***************************************************************************/ /***************************************************************************/ /* */ /* gxvalid is derived from both gxlayout module and otvalid module. */ /* Development of gxlayout is supported by the Information-technology */ /* Promotion Agency(IPA), Japan. */ /* */ /***************************************************************************/ #include "gxvmort.h" /*************************************************************************/ /* */ /* The macro FT_COMPONENT is used in trace mode. It is an implicit */ /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */ /* messages during execution. */ /* */ #undef FT_COMPONENT #define FT_COMPONENT trace_gxvmort /* * mort subtable type5 (Contextual Glyph Insertion) * has the format of StateTable with insertion-glyph-list, * but without name. The offset is given by glyphOffset in * entryTable. There is no table location declaration * like xxxTable. */ typedef struct GXV_mort_subtable_type5_StateOptRec_ { FT_UShort classTable; FT_UShort stateArray; FT_UShort entryTable; #define GXV_MORT_SUBTABLE_TYPE5_HEADER_SIZE GXV_STATETABLE_HEADER_SIZE FT_UShort* classTable_length_p; FT_UShort* stateArray_length_p; FT_UShort* entryTable_length_p; } GXV_mort_subtable_type5_StateOptRec, *GXV_mort_subtable_type5_StateOptRecData; FT_LOCAL_DEF( void ) gxv_mort_subtable_type5_subtable_setup( FT_UShort table_size, FT_UShort classTable, FT_UShort stateArray, FT_UShort entryTable, FT_UShort* classTable_length_p, FT_UShort* stateArray_length_p, FT_UShort* entryTable_length_p, GXV_Validator gxvalid ) { GXV_mort_subtable_type5_StateOptRecData optdata = (GXV_mort_subtable_type5_StateOptRecData)gxvalid->statetable.optdata; gxv_StateTable_subtable_setup( table_size, classTable, stateArray, entryTable, classTable_length_p, stateArray_length_p, entryTable_length_p, gxvalid ); optdata->classTable = classTable; optdata->stateArray = stateArray; optdata->entryTable = entryTable; optdata->classTable_length_p = classTable_length_p; optdata->stateArray_length_p = stateArray_length_p; optdata->entryTable_length_p = entryTable_length_p; } static void gxv_mort_subtable_type5_InsertList_validate( FT_UShort offset, FT_UShort count, FT_Bytes table, FT_Bytes limit, GXV_Validator gxvalid ) { /* * We don't know the range of insertion-glyph-list. * Set range by whole of state table. */ FT_Bytes p = table + offset; GXV_mort_subtable_type5_StateOptRecData optdata = (GXV_mort_subtable_type5_StateOptRecData)gxvalid->statetable.optdata; if ( optdata->classTable < offset && offset < optdata->classTable + *(optdata->classTable_length_p) ) GXV_TRACE(( " offset runs into ClassTable" )); if ( optdata->stateArray < offset && offset < optdata->stateArray + *(optdata->stateArray_length_p) ) GXV_TRACE(( " offset runs into StateArray" )); if ( optdata->entryTable < offset && offset < optdata->entryTable + *(optdata->entryTable_length_p) ) GXV_TRACE(( " offset runs into EntryTable" )); #ifndef GXV_LOAD_TRACE_VARS GXV_LIMIT_CHECK( count * 2 ); #else while ( p < table + offset + ( count * 2 ) ) { FT_UShort insert_glyphID; GXV_LIMIT_CHECK( 2 ); insert_glyphID = FT_NEXT_USHORT( p ); GXV_TRACE(( " 0x%04x", insert_glyphID )); } GXV_TRACE(( "\n" )); #endif } static void gxv_mort_subtable_type5_entry_validate( FT_Byte state, FT_UShort flags, GXV_StateTable_GlyphOffsetCPtr glyphOffset, FT_Bytes table, FT_Bytes limit, GXV_Validator gxvalid ) { #ifdef GXV_LOAD_UNUSED_VARS FT_Bool setMark; FT_Bool dontAdvance; FT_Bool currentIsKashidaLike; FT_Bool markedIsKashidaLike; FT_Bool currentInsertBefore; FT_Bool markedInsertBefore; #endif FT_Byte currentInsertCount; FT_Byte markedInsertCount; FT_UShort currentInsertList; FT_UShort markedInsertList; FT_UNUSED( state ); #ifdef GXV_LOAD_UNUSED_VARS setMark = FT_BOOL( ( flags >> 15 ) & 1 ); dontAdvance = FT_BOOL( ( flags >> 14 ) & 1 ); currentIsKashidaLike = FT_BOOL( ( flags >> 13 ) & 1 ); markedIsKashidaLike = FT_BOOL( ( flags >> 12 ) & 1 ); currentInsertBefore = FT_BOOL( ( flags >> 11 ) & 1 ); markedInsertBefore = FT_BOOL( ( flags >> 10 ) & 1 ); #endif currentInsertCount = (FT_Byte)( ( flags >> 5 ) & 0x1F ); markedInsertCount = (FT_Byte)( flags & 0x001F ); currentInsertList = (FT_UShort)( glyphOffset->ul >> 16 ); markedInsertList = (FT_UShort)( glyphOffset->ul ); if ( 0 != currentInsertList && 0 != currentInsertCount ) { gxv_mort_subtable_type5_InsertList_validate( currentInsertList, currentInsertCount, table, limit, gxvalid ); } if ( 0 != markedInsertList && 0 != markedInsertCount ) { gxv_mort_subtable_type5_InsertList_validate( markedInsertList, markedInsertCount, table, limit, gxvalid ); } } FT_LOCAL_DEF( void ) gxv_mort_subtable_type5_validate( FT_Bytes table, FT_Bytes limit, GXV_Validator gxvalid ) { FT_Bytes p = table; GXV_mort_subtable_type5_StateOptRec et_rec; GXV_mort_subtable_type5_StateOptRecData et = &et_rec; GXV_NAME_ENTER( "mort chain subtable type5 (Glyph Insertion)" ); GXV_LIMIT_CHECK( GXV_MORT_SUBTABLE_TYPE5_HEADER_SIZE ); gxvalid->statetable.optdata = et; gxvalid->statetable.optdata_load_func = NULL; gxvalid->statetable.subtable_setup_func = gxv_mort_subtable_type5_subtable_setup; gxvalid->statetable.entry_glyphoffset_fmt = GXV_GLYPHOFFSET_ULONG; gxvalid->statetable.entry_validate_func = gxv_mort_subtable_type5_entry_validate; gxv_StateTable_validate( p, limit, gxvalid ); GXV_EXIT; } /* END */