/***************************************************************************/ /* */ /* gxvmorx5.c */ /* */ /* TrueTypeGX/AAT morx 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 was support of Information-technology Promotion */ /* Agency(IPA), Japan. */ /***************************************************************************/ #include "gxvmorx.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_gxvmorx /* * morx subtable type5 (Contextual Glyph Insertion) * has format of StateTable with insertion-glyph-list * without name. however, 32bit offset from the head * of subtable to the i-g-l is given after "entryTable", * without variable name specification (the exist of * offset to the table is different from mort type5). */ typedef struct GXV_morx_subtable_type5_StateOptRec_ { FT_ULong insertionGlyphList; FT_ULong insertionGlyphList_length; } GXV_morx_subtable_type5_StateOptRec, *GXV_morx_subtable_type5_StateOptRecData; #define GXV_MORX_SUBTABLE_TYPE5_HEADER_SIZE ( GXV_STATETABLE_HEADER_SIZE + 4 ) static void gxv_morx_subtable_type5_insertionGlyphList_load( FT_Bytes table, FT_Bytes limit, GXV_Validator valid ) { FT_Bytes p = table; GXV_morx_subtable_type5_StateOptRecData optdata = valid->xstatetable.optdata; GXV_LIMIT_CHECK( 4 ); optdata->insertionGlyphList = FT_NEXT_ULONG( p ); } static void gxv_morx_subtable_type5_subtable_setup( FT_ULong table_size, FT_ULong classTable, FT_ULong stateArray, FT_ULong entryTable, FT_ULong* classTable_length_p, FT_ULong* stateArray_length_p, FT_ULong* entryTable_length_p, GXV_Validator valid ) { FT_ULong o[4]; FT_ULong* l[4]; FT_ULong buff[5]; GXV_morx_subtable_type5_StateOptRecData optdata = valid->xstatetable.optdata; o[0] = classTable; o[1] = stateArray; o[2] = entryTable; o[3] = optdata->insertionGlyphList; l[0] = classTable_length_p; l[1] = stateArray_length_p; l[2] = entryTable_length_p; l[3] = &(optdata->insertionGlyphList_length); gxv_set_length_by_ulong_offset( o, l, buff, 4, table_size, valid ); } static void gxv_morx_subtable_type5_InsertList_validate( FT_UShort index, FT_UShort count, FT_Bytes table, FT_Bytes limit, GXV_Validator valid ) { FT_Bytes p = table + ( index * 2 ); while ( p < table + ( count * 2 ) + ( index * 2 ) ) { FT_UShort insert_glyphID; GXV_LIMIT_CHECK( 2 ); insert_glyphID = FT_NEXT_USHORT( p ); GXV_TRACE(( " 0x%04x", insert_glyphID )); } GXV_TRACE(( "\n" )); } static void gxv_morx_subtable_type5_entry_validate( FT_UShort state, FT_UShort flags, GXV_StateTable_GlyphOffsetDesc glyphOffset, FT_Bytes table, FT_Bytes limit, GXV_Validator valid ) { FT_Bool setMark; FT_Bool dontAdvance; FT_Bool currentIsKashidaLike; FT_Bool markedIsKashidaLike; FT_Bool currentInsertBefore; FT_Bool markedInsertBefore; FT_Bool currentInsertCount; FT_Byte markedInsertCount; FT_Byte currentInsertList; FT_UShort markedInsertList; setMark = ( flags >> 15 ) & 1; dontAdvance = ( flags >> 14 ) & 1; currentIsKashidaLike = ( flags >> 13 ) & 1; markedIsKashidaLike = ( flags >> 12 ) & 1; currentInsertBefore = ( flags >> 11 ) & 1; markedInsertBefore = ( flags >> 10 ) & 1; currentInsertCount = ( flags & 0x03E0 ) / 0x20; markedInsertCount = ( flags & 0x001F ); currentInsertList = glyphOffset.ul / 0x00010000; markedInsertList = glyphOffset.ul & 0x0000FFFF; if ( currentInsertList && 0 != currentInsertCount ) { gxv_morx_subtable_type5_InsertList_validate( currentInsertList, currentInsertCount, table, limit, valid ); } if ( markedInsertList && 0 != markedInsertCount ) { gxv_morx_subtable_type5_InsertList_validate( markedInsertList, markedInsertCount, table, limit, valid ); } } static void gxv_morx_subtable_type5_validate( FT_Bytes table, FT_Bytes limit, GXV_Validator valid ) { FT_Bytes p = table; GXV_morx_subtable_type5_StateOptRec et_rec; GXV_morx_subtable_type5_StateOptRecData et = &et_rec; GXV_NAME_ENTER( "morx chain subtable type5 (Glyph Insertion)" ); GXV_LIMIT_CHECK( GXV_MORX_SUBTABLE_TYPE5_HEADER_SIZE ); valid->xstatetable.optdata = et; valid->xstatetable.optdata_load_func = gxv_morx_subtable_type5_insertionGlyphList_load; valid->xstatetable.subtable_setup_func = gxv_morx_subtable_type5_subtable_setup; valid->xstatetable.entry_glyphoffset_fmt = GXV_GLYPHOFFSET_ULONG; valid->xstatetable.entry_validate_func = gxv_morx_subtable_type5_entry_validate; gxv_XStateTable_validate( p, limit, valid ); GXV_EXIT; } /* END */