123 lines
4.7 KiB
C
123 lines
4.7 KiB
C
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/***************************************************************************/
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/* */
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/* gxvmort0.c */
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/* */
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/* TrueTypeGX/AAT mort table validation */
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/* body for type0 (Indic Script Rearrangement) subtable. */
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/* */
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/* Copyright 2005 by suzuki toshiya, Masatake YAMATO, Red Hat K.K., */
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/* David Turner, Robert Wilhelm, and Werner Lemberg. */
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/* */
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/* This file is part of the FreeType project, and may only be used, */
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/* modified, and distributed under the terms of the FreeType project */
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/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
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/* this file you indicate that you have read the license and */
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/* understand and accept it fully. */
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/* */
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/***************************************************************************/
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/***************************************************************************/
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/* gxvalid is derived from both gxlayout module and otvalid module. */
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/* Development of gxlayout was support of Information-technology Promotion */
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/* Agency(IPA), Japan. */
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/***************************************************************************/
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#include "gxvmort.h"
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/*************************************************************************/
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/* */
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/* The macro FT_COMPONENT is used in trace mode. It is an implicit */
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/* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */
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/* messages during execution. */
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/* */
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#undef FT_COMPONENT
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#define FT_COMPONENT trace_gxvmort
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static char* GXV_Mort_IndicScript_Msg [] =
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{
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"no change",
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"Ax => xA",
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"xD => Dx",
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"AxD => DxA",
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"ABx => xAB",
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"ABx => xBA",
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"xCD => CDx",
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"xCD => DCx",
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"AxCD => CDxA",
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"AxCD => DCxA",
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"ABxD => DxAB",
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"ABxD => DxBA",
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"ABxCD => CDxAB",
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"ABxCD => CDxBA",
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"ABxCD => DCxAB",
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"ABxCD => DCxBA",
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};
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static void
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gxv_mort_subtable_type0_entry_validate( FT_Byte state,
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FT_UShort flags,
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GXV_StateTable_GlyphOffsetDesc glyphOffset,
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FT_Bytes table,
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FT_Bytes limit,
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GXV_Validator valid )
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{
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FT_UShort markFirst;
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FT_UShort dontAdvance;
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FT_UShort markLast;
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FT_UShort reserved;
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FT_UShort verb;
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markFirst = flags / 0x8000;
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dontAdvance = ( flags & 0x4000 ) / 0x4000;
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markLast = ( flags & 0x2000 ) / 0x2000;
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reserved = flags & 0x1FF0;
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verb = flags & 0x000F;
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FT_UNUSED( GXV_Mort_IndicScript_Msg[verb] );
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GXV_TRACE(( " IndicScript MorphRule for glyphOffset 0x%04x", glyphOffset.u ));
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GXV_TRACE(( " markFirst=%01d", markFirst ));
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GXV_TRACE(( " dontAdvance=%01d", dontAdvance ));
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GXV_TRACE(( " markLast=%01d", markLast ));
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GXV_TRACE(( " %02d", verb ));
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GXV_TRACE(( " %s\n", GXV_Mort_IndicScript_Msg[verb] ));
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if ( 0 < reserved )
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{
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GXV_TRACE(( " non-zero bits found in reserved range\n" ));
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FT_INVALID_DATA;
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}
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else
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{
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GXV_TRACE(( "\n" ));
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}
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}
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static void
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gxv_mort_subtable_type0_validate( FT_Bytes table,
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FT_Bytes limit,
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GXV_Validator valid )
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{
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FT_Bytes p = table;
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GXV_NAME_ENTER( "mort chain subtable type0 (Indic-Script Rearrangement)" );
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GXV_LIMIT_CHECK( GXV_STATETABLE_HEADER_SIZE );
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valid->statetable.optdata = NULL;
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valid->statetable.optdata_load_func = NULL;
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valid->statetable.subtable_setup_func = NULL;
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valid->statetable.entry_glyphoffset_fmt = GXV_GLYPHOFFSET_NONE;
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valid->statetable.entry_validate_func = gxv_mort_subtable_type0_entry_validate;
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gxv_StateTable_validate( p, limit, valid );
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GXV_EXIT;
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}
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/* END */
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