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/***************************************************************************/
/* */
/* gxvmort0.c */
/* */
/* TrueTypeGX/AAT mort table validation */
/* body for type0 (Indic Script Rearrangement) subtable. */
/* */
/* Copyright 2005-2015 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
static const char* GXV_Mort_IndicScript_Msg[] =
{
"no change",
"Ax => xA",
"xD => Dx",
"AxD => DxA",
"ABx => xAB",
"ABx => xBA",
"xCD => CDx",
"xCD => DCx",
"AxCD => CDxA",
"AxCD => DCxA",
"ABxD => DxAB",
"ABxD => DxBA",
"ABxCD => CDxAB",
"ABxCD => CDxBA",
"ABxCD => DCxAB",
"ABxCD => DCxBA",
};
static void
gxv_mort_subtable_type0_entry_validate(
FT_Byte state,
FT_UShort flags,
GXV_StateTable_GlyphOffsetCPtr glyphOffset_p,
FT_Bytes table,
FT_Bytes limit,
GXV_Validator gxvalid )
{
FT_UShort markFirst;
FT_UShort dontAdvance;
FT_UShort markLast;
FT_UShort reserved;
FT_UShort verb = 0;
FT_UNUSED( state );
FT_UNUSED( table );
FT_UNUSED( limit );
FT_UNUSED( GXV_Mort_IndicScript_Msg[verb] ); /* for the non-debugging */
FT_UNUSED( glyphOffset_p ); /* case */
markFirst = (FT_UShort)( ( flags >> 15 ) & 1 );
dontAdvance = (FT_UShort)( ( flags >> 14 ) & 1 );
markLast = (FT_UShort)( ( flags >> 13 ) & 1 );
reserved = (FT_UShort)( flags & 0x1FF0 );
verb = (FT_UShort)( flags & 0x000F );
GXV_TRACE(( " IndicScript MorphRule for glyphOffset 0x%04x",
glyphOffset_p->u ));
GXV_TRACE(( " markFirst=%01d", markFirst ));
GXV_TRACE(( " dontAdvance=%01d", dontAdvance ));
GXV_TRACE(( " markLast=%01d", markLast ));
GXV_TRACE(( " %02d", verb ));
GXV_TRACE(( " %s\n", GXV_Mort_IndicScript_Msg[verb] ));
if ( markFirst > 0 && markLast > 0 )
{
GXV_TRACE(( " [odd] a glyph is marked as the first and last"
" in Indic rearrangement\n" ));
GXV_SET_ERR_IF_PARANOID( FT_INVALID_DATA );
}
if ( markFirst > 0 && dontAdvance > 0 )
{
GXV_TRACE(( " [odd] the first glyph is marked as dontAdvance"
" in Indic rearrangement\n" ));
GXV_SET_ERR_IF_PARANOID( FT_INVALID_DATA );
}
if ( 0 < reserved )
{
GXV_TRACE(( " non-zero bits found in reserved range\n" ));
GXV_SET_ERR_IF_PARANOID( FT_INVALID_DATA );
}
else
GXV_TRACE(( "\n" ));
}
FT_LOCAL_DEF( void )
gxv_mort_subtable_type0_validate( FT_Bytes table,
FT_Bytes limit,
GXV_Validator gxvalid )
{
FT_Bytes p = table;
GXV_NAME_ENTER(
"mort chain subtable type0 (Indic-Script Rearrangement)" );
GXV_LIMIT_CHECK( GXV_STATETABLE_HEADER_SIZE );
gxvalid->statetable.optdata = NULL;
gxvalid->statetable.optdata_load_func = NULL;
gxvalid->statetable.subtable_setup_func = NULL;
gxvalid->statetable.entry_glyphoffset_fmt = GXV_GLYPHOFFSET_NONE;
gxvalid->statetable.entry_validate_func =
gxv_mort_subtable_type0_entry_validate;
gxv_StateTable_validate( p, limit, gxvalid );
GXV_EXIT;
}
/* END */
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