/***************************************************************************/
/* */
/* gxvmorx5.c */
/* */
/* TrueTypeGX/AAT morx table validation */
/* body for type5 (Contextual Glyph Insertion) subtable. */
/* */
/* Copyright 2005, 2007 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 "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 a StateTable with insertion-glyph-list
* without name. However, the 32bit offset from the head
* of subtable to the i-g-l is given after `entryTable',
* without variable name specification (the existence of
* this 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 =
(GXV_morx_subtable_type5_StateOptRecData)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 =
(GXV_morx_subtable_type5_StateOptRecData)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 table_index,
FT_UShort count,
FT_Bytes table,
FT_Bytes limit,
GXV_Validator valid )
{
FT_Bytes p = table + table_index * 2;
while ( p < table + count * 2 + table_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_GlyphOffsetCPtr glyphOffset_p,
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_Byte 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_Byte) ( glyphOffset_p->ul >> 16 );
markedInsertList = (FT_UShort)( glyphOffset_p->ul );
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 );
}
FT_LOCAL_DEF( 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 */