| /***************************************************************************/ |
| /* */ |
| /* gxvmort5.c */ |
| /* */ |
| /* TrueTypeGX/AAT mort table validation */ |
| /* body for type5 (Contextual Glyph Insertion) subtable. */ |
| /* */ |
| /* Copyright 2005 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 |
| |
| |
| /* |
| * mort subtable type5 (Contextual Glyph Insertion) |
| * has the format of StateTable with insertion-glyph-list, |
| * but without name. The offset is given by glyphOffset in |
| * entryTable. There is no table location declaration |
| * like xxxTable. |
| */ |
| |
| typedef struct GXV_mort_subtable_type5_StateOptRec_ |
| { |
| FT_UShort classTable; |
| FT_UShort stateArray; |
| FT_UShort entryTable; |
| |
| #define GXV_MORT_SUBTABLE_TYPE5_HEADER_SIZE GXV_STATETABLE_HEADER_SIZE |
| |
| FT_UShort* classTable_length_p; |
| FT_UShort* stateArray_length_p; |
| FT_UShort* entryTable_length_p; |
| |
| } GXV_mort_subtable_type5_StateOptRec, |
| *GXV_mort_subtable_type5_StateOptRecData; |
| |
| |
| FT_LOCAL_DEF( void ) |
| gxv_mort_subtable_type5_subtable_setup( FT_UShort table_size, |
| FT_UShort classTable, |
| FT_UShort stateArray, |
| FT_UShort entryTable, |
| FT_UShort* classTable_length_p, |
| FT_UShort* stateArray_length_p, |
| FT_UShort* entryTable_length_p, |
| GXV_Validator valid ) |
| { |
| GXV_mort_subtable_type5_StateOptRecData optdata = |
| (GXV_mort_subtable_type5_StateOptRecData)valid->statetable.optdata; |
| |
| |
| gxv_StateTable_subtable_setup( table_size, |
| classTable, |
| stateArray, |
| entryTable, |
| classTable_length_p, |
| stateArray_length_p, |
| entryTable_length_p, |
| valid ); |
| |
| optdata->classTable = classTable; |
| optdata->stateArray = stateArray; |
| optdata->entryTable = entryTable; |
| |
| optdata->classTable_length_p = classTable_length_p; |
| optdata->stateArray_length_p = stateArray_length_p; |
| optdata->entryTable_length_p = entryTable_length_p; |
| } |
| |
| |
| static void |
| gxv_mort_subtable_type5_InsertList_validate( FT_UShort offset, |
| FT_UShort count, |
| FT_Bytes table, |
| FT_Bytes limit, |
| GXV_Validator valid ) |
| { |
| /* |
| * We don't know the range of insertion-glyph-list. |
| * Set range by whole of state table. |
| */ |
| FT_Bytes p = table + offset; |
| |
| GXV_mort_subtable_type5_StateOptRecData optdata = |
| (GXV_mort_subtable_type5_StateOptRecData)valid->statetable.optdata; |
| |
| if ( optdata->classTable < offset && |
| offset < optdata->classTable + *(optdata->classTable_length_p) ) |
| GXV_TRACE(( " offset runs into ClassTable" )); |
| if ( optdata->stateArray < offset && |
| offset < optdata->stateArray + *(optdata->stateArray_length_p) ) |
| GXV_TRACE(( " offset runs into StateArray" )); |
| if ( optdata->entryTable < offset && |
| offset < optdata->entryTable + *(optdata->entryTable_length_p) ) |
| GXV_TRACE(( " offset runs into EntryTable" )); |
| |
| while ( p < table + offset + ( count * 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_mort_subtable_type5_entry_validate( |
| FT_Byte state, |
| FT_UShort flags, |
| GXV_StateTable_GlyphOffsetDesc glyphOffset, |
| 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_UShort 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_UShort)( glyphOffset.ul >> 16 ); |
| markedInsertList = (FT_UShort)( glyphOffset.ul ); |
| |
| if ( 0 != currentInsertList && 0 != currentInsertCount ) |
| { |
| gxv_mort_subtable_type5_InsertList_validate( currentInsertList, |
| currentInsertCount, |
| table, |
| limit, |
| valid ); |
| } |
| |
| if ( 0 != markedInsertList && 0 != markedInsertCount ) |
| { |
| gxv_mort_subtable_type5_InsertList_validate( markedInsertList, |
| markedInsertCount, |
| table, |
| limit, |
| valid ); |
| } |
| } |
| |
| |
| FT_LOCAL_DEF( void ) |
| gxv_mort_subtable_type5_validate( FT_Bytes table, |
| FT_Bytes limit, |
| GXV_Validator valid ) |
| { |
| FT_Bytes p = table; |
| |
| GXV_mort_subtable_type5_StateOptRec et_rec; |
| GXV_mort_subtable_type5_StateOptRecData et = &et_rec; |
| |
| |
| GXV_NAME_ENTER( "mort chain subtable type5 (Glyph Insertion)" ); |
| |
| GXV_LIMIT_CHECK( GXV_MORT_SUBTABLE_TYPE5_HEADER_SIZE ); |
| |
| valid->statetable.optdata = |
| et; |
| valid->statetable.optdata_load_func = |
| NULL; |
| valid->statetable.subtable_setup_func = |
| gxv_mort_subtable_type5_subtable_setup; |
| valid->statetable.entry_glyphoffset_fmt = |
| GXV_GLYPHOFFSET_ULONG; |
| valid->statetable.entry_validate_func = |
| gxv_mort_subtable_type5_entry_validate; |
| |
| gxv_StateTable_validate( p, limit, valid ); |
| |
| GXV_EXIT; |
| } |
| |
| |
| /* END */ |
