WebSVN – Kolibri OS – Blame – /contrib/sdk/sources/freetype/src/gxvalid/gxvmort5.c

Rev	Author	Line No.	Line
4349	Serge	1	/***************************************************************************/
		2	/* */
		3	/* gxvmort5.c */
		4	/* */
		5	/* TrueTypeGX/AAT mort table validation */
		6	/* body for type5 (Contextual Glyph Insertion) subtable. */
		7	/* */
		8	/* Copyright 2005 by suzuki toshiya, Masatake YAMATO, Red Hat K.K., */
		9	/* David Turner, Robert Wilhelm, and Werner Lemberg. */
		10	/* */
		11	/* This file is part of the FreeType project, and may only be used, */
		12	/* modified, and distributed under the terms of the FreeType project */
		13	/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
		14	/* this file you indicate that you have read the license and */
		15	/* understand and accept it fully. */
		16	/* */
		17	/***************************************************************************/
		18
		19	/***************************************************************************/
		20	/* */
		21	/* gxvalid is derived from both gxlayout module and otvalid module. */
		22	/* Development of gxlayout is supported by the Information-technology */
		23	/* Promotion Agency(IPA), Japan. */
		24	/* */
		25	/***************************************************************************/
		26
		27
		28	#include "gxvmort.h"
		29
		30
		31	/*************************************************************************/
		32	/* */
		33	/* The macro FT_COMPONENT is used in trace mode. It is an implicit */
		34	/* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */
		35	/* messages during execution. */
		36	/* */
		37	#undef FT_COMPONENT
		38	#define FT_COMPONENT trace_gxvmort
		39
		40
		41	/*
		42	* mort subtable type5 (Contextual Glyph Insertion)
		43	* has the format of StateTable with insertion-glyph-list,
		44	* but without name. The offset is given by glyphOffset in
		45	* entryTable. There is no table location declaration
		46	* like xxxTable.
		47	*/
		48
		49	typedef struct GXV_mort_subtable_type5_StateOptRec_
		50	{
		51	FT_UShort classTable;
		52	FT_UShort stateArray;
		53	FT_UShort entryTable;
		54
		55	#define GXV_MORT_SUBTABLE_TYPE5_HEADER_SIZE GXV_STATETABLE_HEADER_SIZE
		56
		57	FT_UShort* classTable_length_p;
		58	FT_UShort* stateArray_length_p;
		59	FT_UShort* entryTable_length_p;
		60
		61	} GXV_mort_subtable_type5_StateOptRec,
		62	*GXV_mort_subtable_type5_StateOptRecData;
		63
		64
		65	FT_LOCAL_DEF( void )
		66	gxv_mort_subtable_type5_subtable_setup( FT_UShort table_size,
		67	FT_UShort classTable,
		68	FT_UShort stateArray,
		69	FT_UShort entryTable,
		70	FT_UShort* classTable_length_p,
		71	FT_UShort* stateArray_length_p,
		72	FT_UShort* entryTable_length_p,
		73	GXV_Validator valid )
		74	{
		75	GXV_mort_subtable_type5_StateOptRecData optdata =
		76	(GXV_mort_subtable_type5_StateOptRecData)valid->statetable.optdata;
		77
		78
		79	gxv_StateTable_subtable_setup( table_size,
		80	classTable,
		81	stateArray,
		82	entryTable,
		83	classTable_length_p,
		84	stateArray_length_p,
		85	entryTable_length_p,
		86	valid );
		87
		88	optdata->classTable = classTable;
		89	optdata->stateArray = stateArray;
		90	optdata->entryTable = entryTable;
		91
		92	optdata->classTable_length_p = classTable_length_p;
		93	optdata->stateArray_length_p = stateArray_length_p;
		94	optdata->entryTable_length_p = entryTable_length_p;
		95	}
		96
		97
		98	static void
		99	gxv_mort_subtable_type5_InsertList_validate( FT_UShort offset,
		100	FT_UShort count,
		101	FT_Bytes table,
		102	FT_Bytes limit,
		103	GXV_Validator valid )
		104	{
		105	/*
		106	* We don't know the range of insertion-glyph-list.
		107	* Set range by whole of state table.
		108	*/
		109	FT_Bytes p = table + offset;
		110
		111	GXV_mort_subtable_type5_StateOptRecData optdata =
		112	(GXV_mort_subtable_type5_StateOptRecData)valid->statetable.optdata;
		113
		114	if ( optdata->classTable < offset &&
		115	offset < optdata->classTable + *(optdata->classTable_length_p) )
		116	GXV_TRACE(( " offset runs into ClassTable" ));
		117	if ( optdata->stateArray < offset &&
		118	offset < optdata->stateArray + *(optdata->stateArray_length_p) )
		119	GXV_TRACE(( " offset runs into StateArray" ));
		120	if ( optdata->entryTable < offset &&
		121	offset < optdata->entryTable + *(optdata->entryTable_length_p) )
		122	GXV_TRACE(( " offset runs into EntryTable" ));
		123
		124	#ifndef GXV_LOAD_TRACE_VARS
		125	GXV_LIMIT_CHECK( count * 2 );
		126	#else
		127	while ( p < table + offset + ( count * 2 ) )
		128	{
		129	FT_UShort insert_glyphID;
		130
		131
		132	GXV_LIMIT_CHECK( 2 );
		133	insert_glyphID = FT_NEXT_USHORT( p );
		134	GXV_TRACE(( " 0x%04x", insert_glyphID ));
		135	}
		136	GXV_TRACE(( "\n" ));
		137	#endif
		138	}
		139
		140
		141	static void
		142	gxv_mort_subtable_type5_entry_validate(
		143	FT_Byte state,
		144	FT_UShort flags,
		145	GXV_StateTable_GlyphOffsetCPtr glyphOffset,
		146	FT_Bytes table,
		147	FT_Bytes limit,
		148	GXV_Validator valid )
		149	{
		150	#ifdef GXV_LOAD_UNUSED_VARS
		151	FT_Bool setMark;
		152	FT_Bool dontAdvance;
		153	FT_Bool currentIsKashidaLike;
		154	FT_Bool markedIsKashidaLike;
		155	FT_Bool currentInsertBefore;
		156	FT_Bool markedInsertBefore;
		157	#endif
		158	FT_Byte currentInsertCount;
		159	FT_Byte markedInsertCount;
		160	FT_UShort currentInsertList;
		161	FT_UShort markedInsertList;
		162
		163	FT_UNUSED( state );
		164
		165
		166	#ifdef GXV_LOAD_UNUSED_VARS
		167	setMark = FT_BOOL( ( flags >> 15 ) & 1 );
		168	dontAdvance = FT_BOOL( ( flags >> 14 ) & 1 );
		169	currentIsKashidaLike = FT_BOOL( ( flags >> 13 ) & 1 );
		170	markedIsKashidaLike = FT_BOOL( ( flags >> 12 ) & 1 );
		171	currentInsertBefore = FT_BOOL( ( flags >> 11 ) & 1 );
		172	markedInsertBefore = FT_BOOL( ( flags >> 10 ) & 1 );
		173	#endif
		174
		175	currentInsertCount = (FT_Byte)( ( flags >> 5 ) & 0x1F );
		176	markedInsertCount = (FT_Byte)( flags & 0x001F );
		177
		178	currentInsertList = (FT_UShort)( glyphOffset->ul >> 16 );
		179	markedInsertList = (FT_UShort)( glyphOffset->ul );
		180
		181	if ( 0 != currentInsertList && 0 != currentInsertCount )
		182	{
		183	gxv_mort_subtable_type5_InsertList_validate( currentInsertList,
		184	currentInsertCount,
		185	table,
		186	limit,
		187	valid );
		188	}
		189
		190	if ( 0 != markedInsertList && 0 != markedInsertCount )
		191	{
		192	gxv_mort_subtable_type5_InsertList_validate( markedInsertList,
		193	markedInsertCount,
		194	table,
		195	limit,
		196	valid );
		197	}
		198	}
		199
		200
		201	FT_LOCAL_DEF( void )
		202	gxv_mort_subtable_type5_validate( FT_Bytes table,
		203	FT_Bytes limit,
		204	GXV_Validator valid )
		205	{
		206	FT_Bytes p = table;
		207
		208	GXV_mort_subtable_type5_StateOptRec et_rec;
		209	GXV_mort_subtable_type5_StateOptRecData et = &et_rec;
		210
		211
		212	GXV_NAME_ENTER( "mort chain subtable type5 (Glyph Insertion)" );
		213
		214	GXV_LIMIT_CHECK( GXV_MORT_SUBTABLE_TYPE5_HEADER_SIZE );
		215
		216	valid->statetable.optdata =
		217	et;
		218	valid->statetable.optdata_load_func =
		219	NULL;
		220	valid->statetable.subtable_setup_func =
		221	gxv_mort_subtable_type5_subtable_setup;
		222	valid->statetable.entry_glyphoffset_fmt =
		223	GXV_GLYPHOFFSET_ULONG;
		224	valid->statetable.entry_validate_func =
		225	gxv_mort_subtable_type5_entry_validate;
		226
		227	gxv_StateTable_validate( p, limit, valid );
		228
		229	GXV_EXIT;
		230	}
		231
		232
		233	/* END */

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(root)/contrib/sdk/sources/freetype/src/gxvalid/gxvmort5.c – Rev 4349