/***************************************************************************/
/* */
/* 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 valid )
{
GXV_mort_subtable_type5_StateOptRecData optdata =
(GXV_mort_subtable_type5_StateOptRecData)valid->statetable.optdata;
gxv_StateTable_subtable_setup( table_size,
classTable,
stateArray,
entryTable,
classTable_length_p,
stateArray_length_p,
entryTable_length_p,
valid );
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 valid )
{
/*
* 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)valid->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" ));
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" ));
}
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 valid )
{
FT_Bool setMark;
FT_Bool dontAdvance;
FT_Bool currentIsKashidaLike;
FT_Bool markedIsKashidaLike;
FT_Bool currentInsertBefore;
FT_Bool markedInsertBefore;
FT_Byte currentInsertCount;
FT_Byte markedInsertCount;
FT_UShort currentInsertList;
FT_UShort markedInsertList;
FT_UNUSED( state );
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 );
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,
valid );
}
if ( 0 != markedInsertList && 0 != markedInsertCount )
{
gxv_mort_subtable_type5_InsertList_validate( markedInsertList,
markedInsertCount,
table,
limit,
valid );
}
}
FT_LOCAL_DEF( void )
gxv_mort_subtable_type5_validate( FT_Bytes table,
FT_Bytes limit,
GXV_Validator valid )
{
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 );
valid->statetable.optdata =
et;
valid->statetable.optdata_load_func =
NULL;
valid->statetable.subtable_setup_func =
gxv_mort_subtable_type5_subtable_setup;
valid->statetable.entry_glyphoffset_fmt =
GXV_GLYPHOFFSET_ULONG;
valid->statetable.entry_validate_func =
gxv_mort_subtable_type5_entry_validate;
gxv_StateTable_validate( p, limit, valid );
GXV_EXIT;
}
/* END */