+++ /dev/null
-/***************************************************************************/
-/* */
-/* gxvmorx1.c */
-/* */
-/* TrueTypeGX/AAT morx table validation */
-/* body for type1 (Contextual Substitution) subtable. */
-/* */
-/* Copyright 2005-2016 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
-
-
- typedef struct GXV_morx_subtable_type1_StateOptRec_
- {
- FT_ULong substitutionTable;
- FT_ULong substitutionTable_length;
- FT_UShort substitutionTable_num_lookupTables;
-
- } GXV_morx_subtable_type1_StateOptRec,
- *GXV_morx_subtable_type1_StateOptRecData;
-
-
-#define GXV_MORX_SUBTABLE_TYPE1_HEADER_SIZE \
- ( GXV_STATETABLE_HEADER_SIZE + 2 )
-
-
- static void
- gxv_morx_subtable_type1_substitutionTable_load( FT_Bytes table,
- FT_Bytes limit,
- GXV_Validator gxvalid )
- {
- FT_Bytes p = table;
-
- GXV_morx_subtable_type1_StateOptRecData optdata =
- (GXV_morx_subtable_type1_StateOptRecData)gxvalid->xstatetable.optdata;
-
-
- GXV_LIMIT_CHECK( 2 );
- optdata->substitutionTable = FT_NEXT_USHORT( p );
- }
-
-
- static void
- gxv_morx_subtable_type1_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 gxvalid )
- {
- FT_ULong o[4];
- FT_ULong *l[4];
- FT_ULong buff[5];
-
- GXV_morx_subtable_type1_StateOptRecData optdata =
- (GXV_morx_subtable_type1_StateOptRecData)gxvalid->xstatetable.optdata;
-
-
- o[0] = classTable;
- o[1] = stateArray;
- o[2] = entryTable;
- o[3] = optdata->substitutionTable;
- l[0] = classTable_length_p;
- l[1] = stateArray_length_p;
- l[2] = entryTable_length_p;
- l[3] = &(optdata->substitutionTable_length);
-
- gxv_set_length_by_ulong_offset( o, l, buff, 4, table_size, gxvalid );
- }
-
-
- static void
- gxv_morx_subtable_type1_entry_validate(
- FT_UShort state,
- FT_UShort flags,
- GXV_StateTable_GlyphOffsetCPtr glyphOffset_p,
- FT_Bytes table,
- FT_Bytes limit,
- GXV_Validator gxvalid )
- {
-#ifdef GXV_LOAD_TRACE_VARS
- FT_UShort setMark;
- FT_UShort dontAdvance;
-#endif
- FT_UShort reserved;
- FT_Short markIndex;
- FT_Short currentIndex;
-
- GXV_morx_subtable_type1_StateOptRecData optdata =
- (GXV_morx_subtable_type1_StateOptRecData)gxvalid->xstatetable.optdata;
-
- FT_UNUSED( state );
- FT_UNUSED( table );
- FT_UNUSED( limit );
-
-
-#ifdef GXV_LOAD_TRACE_VARS
- setMark = (FT_UShort)( ( flags >> 15 ) & 1 );
- dontAdvance = (FT_UShort)( ( flags >> 14 ) & 1 );
-#endif
-
- reserved = (FT_UShort)( flags & 0x3FFF );
-
- markIndex = (FT_Short)( glyphOffset_p->ul >> 16 );
- currentIndex = (FT_Short)( glyphOffset_p->ul );
-
- GXV_TRACE(( " setMark=%01d dontAdvance=%01d\n",
- setMark, dontAdvance ));
-
- if ( 0 < reserved )
- {
- GXV_TRACE(( " non-zero bits found in reserved range\n" ));
- GXV_SET_ERR_IF_PARANOID( FT_INVALID_DATA );
- }
-
- GXV_TRACE(( "markIndex = %d, currentIndex = %d\n",
- markIndex, currentIndex ));
-
- if ( optdata->substitutionTable_num_lookupTables < markIndex + 1 )
- optdata->substitutionTable_num_lookupTables =
- (FT_UShort)( markIndex + 1 );
-
- if ( optdata->substitutionTable_num_lookupTables < currentIndex + 1 )
- optdata->substitutionTable_num_lookupTables =
- (FT_UShort)( currentIndex + 1 );
- }
-
-
- static void
- gxv_morx_subtable_type1_LookupValue_validate( FT_UShort glyph,
- GXV_LookupValueCPtr value_p,
- GXV_Validator gxvalid )
- {
- FT_UNUSED( glyph ); /* for the non-debugging case */
-
- GXV_TRACE(( "morx subtable type1 subst.: %d -> %d\n", glyph, value_p->u ));
-
- if ( value_p->u > gxvalid->face->num_glyphs )
- FT_INVALID_GLYPH_ID;
- }
-
-
- static GXV_LookupValueDesc
- gxv_morx_subtable_type1_LookupFmt4_transit(
- FT_UShort relative_gindex,
- GXV_LookupValueCPtr base_value_p,
- FT_Bytes lookuptbl_limit,
- GXV_Validator gxvalid )
- {
- FT_Bytes p;
- FT_Bytes limit;
- FT_UShort offset;
- GXV_LookupValueDesc value;
-
- /* XXX: check range? */
- offset = (FT_UShort)( base_value_p->u +
- relative_gindex * sizeof ( FT_UShort ) );
-
- p = gxvalid->lookuptbl_head + offset;
- limit = lookuptbl_limit;
-
- GXV_LIMIT_CHECK ( 2 );
- value.u = FT_NEXT_USHORT( p );
-
- return value;
- }
-
-
- /*
- * TODO: length should be limit?
- **/
- static void
- gxv_morx_subtable_type1_substitutionTable_validate( FT_Bytes table,
- FT_Bytes limit,
- GXV_Validator gxvalid )
- {
- FT_Bytes p = table;
- FT_UShort i;
-
- GXV_morx_subtable_type1_StateOptRecData optdata =
- (GXV_morx_subtable_type1_StateOptRecData)gxvalid->xstatetable.optdata;
-
-
- /* TODO: calculate offset/length for each lookupTables */
- gxvalid->lookupval_sign = GXV_LOOKUPVALUE_UNSIGNED;
- gxvalid->lookupval_func = gxv_morx_subtable_type1_LookupValue_validate;
- gxvalid->lookupfmt4_trans = gxv_morx_subtable_type1_LookupFmt4_transit;
-
- for ( i = 0; i < optdata->substitutionTable_num_lookupTables; i++ )
- {
- FT_ULong offset;
-
-
- GXV_LIMIT_CHECK( 4 );
- offset = FT_NEXT_ULONG( p );
-
- gxv_LookupTable_validate( table + offset, limit, gxvalid );
- }
-
- /* TODO: overlapping of lookupTables in substitutionTable */
- }
-
-
- /*
- * subtable for Contextual glyph substitution is a modified StateTable.
- * In addition to classTable, stateArray, entryTable, the field
- * `substitutionTable' is added.
- */
- FT_LOCAL_DEF( void )
- gxv_morx_subtable_type1_validate( FT_Bytes table,
- FT_Bytes limit,
- GXV_Validator gxvalid )
- {
- FT_Bytes p = table;
-
- GXV_morx_subtable_type1_StateOptRec st_rec;
-
-
- GXV_NAME_ENTER( "morx chain subtable type1 (Contextual Glyph Subst)" );
-
- GXV_LIMIT_CHECK( GXV_MORX_SUBTABLE_TYPE1_HEADER_SIZE );
-
- st_rec.substitutionTable_num_lookupTables = 0;
-
- gxvalid->xstatetable.optdata =
- &st_rec;
- gxvalid->xstatetable.optdata_load_func =
- gxv_morx_subtable_type1_substitutionTable_load;
- gxvalid->xstatetable.subtable_setup_func =
- gxv_morx_subtable_type1_subtable_setup;
- gxvalid->xstatetable.entry_glyphoffset_fmt =
- GXV_GLYPHOFFSET_ULONG;
- gxvalid->xstatetable.entry_validate_func =
- gxv_morx_subtable_type1_entry_validate;
-
- gxv_XStateTable_validate( p, limit, gxvalid );
-
- gxv_morx_subtable_type1_substitutionTable_validate(
- table + st_rec.substitutionTable,
- table + st_rec.substitutionTable + st_rec.substitutionTable_length,
- gxvalid );
-
- GXV_EXIT;
- }
-
-
-/* END */
projects / reactos.git / blobdiff