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Diffstat (limited to 'src/gxvalid/gxvmorx5.c')
| -rw-r--r-- | src/gxvalid/gxvmorx5.c | 197 |
1 files changed, 197 insertions, 0 deletions
diff --git a/src/gxvalid/gxvmorx5.c b/src/gxvalid/gxvmorx5.c new file mode 100644 index 000000000..43f7fe910 --- /dev/null +++ b/src/gxvalid/gxvmorx5.c @@ -0,0 +1,197 @@ +/***************************************************************************/ +/* */ +/* gxvmorx5.c */ +/* */ +/* TrueTypeGX/AAT morx 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 was support of 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 + + +/* + * morx subtable type5 (Contextual Glyph Insertion) + * has format of StateTable with insertion-glyph-list + * without name. however, 32bit offset from the head + * of subtable to the i-g-l is given after "entryTable", + * without variable name specification (the exist of + * offset to the table is different from mort type5). + */ + + + typedef struct GXV_morx_subtable_type5_StateOptRec_ + { + FT_ULong insertionGlyphList; + FT_ULong insertionGlyphList_length; + + } GXV_morx_subtable_type5_StateOptRec, + *GXV_morx_subtable_type5_StateOptRecData; + +#define GXV_MORX_SUBTABLE_TYPE5_HEADER_SIZE ( GXV_STATETABLE_HEADER_SIZE + 4 ) + + static void + gxv_morx_subtable_type5_insertionGlyphList_load( FT_Bytes table, + FT_Bytes limit, + GXV_Validator valid ) + { + FT_Bytes p = table; + GXV_morx_subtable_type5_StateOptRecData optdata = valid->xstatetable.optdata; + + + GXV_LIMIT_CHECK( 4 ); + optdata->insertionGlyphList = FT_NEXT_ULONG( p ); + } + + + static void + gxv_morx_subtable_type5_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 valid ) + { + FT_ULong o[4]; + FT_ULong* l[4]; + FT_ULong buff[5]; + GXV_morx_subtable_type5_StateOptRecData optdata = valid->xstatetable.optdata; + + + o[0] = classTable; + o[1] = stateArray; + o[2] = entryTable; + o[3] = optdata->insertionGlyphList; + l[0] = classTable_length_p; + l[1] = stateArray_length_p; + l[2] = entryTable_length_p; + l[3] = &(optdata->insertionGlyphList_length); + + gxv_set_length_by_ulong_offset( o, l, buff, 4, table_size, valid ); + } + + + static void + gxv_morx_subtable_type5_InsertList_validate( FT_UShort index, + FT_UShort count, + FT_Bytes table, + FT_Bytes limit, + GXV_Validator valid ) + { + FT_Bytes p = table + ( index * 2 ); + + while ( p < table + ( count * 2 ) + ( index * 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_morx_subtable_type5_entry_validate( FT_UShort 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_Bool currentInsertCount; + FT_Byte markedInsertCount; + FT_Byte currentInsertList; + FT_UShort markedInsertList; + + + setMark = ( flags >> 15 ) & 1; + dontAdvance = ( flags >> 14 ) & 1; + currentIsKashidaLike = ( flags >> 13 ) & 1; + markedIsKashidaLike = ( flags >> 12 ) & 1; + currentInsertBefore = ( flags >> 11 ) & 1; + markedInsertBefore = ( flags >> 10 ) & 1; + currentInsertCount = ( flags & 0x03E0 ) / 0x20; + markedInsertCount = ( flags & 0x001F ); + currentInsertList = glyphOffset.ul / 0x00010000; + markedInsertList = glyphOffset.ul & 0x0000FFFF; + + if ( currentInsertList && 0 != currentInsertCount ) + { + gxv_morx_subtable_type5_InsertList_validate( currentInsertList, + currentInsertCount, + table, limit, + valid ); + } + + if ( markedInsertList && 0 != markedInsertCount ) + { + gxv_morx_subtable_type5_InsertList_validate( markedInsertList, + markedInsertCount, + table, limit, + valid ); + } + } + + + static void + gxv_morx_subtable_type5_validate( FT_Bytes table, + FT_Bytes limit, + GXV_Validator valid ) + { + FT_Bytes p = table; + GXV_morx_subtable_type5_StateOptRec et_rec; + GXV_morx_subtable_type5_StateOptRecData et = &et_rec; + + + GXV_NAME_ENTER( "morx chain subtable type5 (Glyph Insertion)" ); + + GXV_LIMIT_CHECK( GXV_MORX_SUBTABLE_TYPE5_HEADER_SIZE ); + + valid->xstatetable.optdata = et; + valid->xstatetable.optdata_load_func = gxv_morx_subtable_type5_insertionGlyphList_load; + valid->xstatetable.subtable_setup_func = gxv_morx_subtable_type5_subtable_setup; + valid->xstatetable.entry_glyphoffset_fmt = GXV_GLYPHOFFSET_ULONG; + valid->xstatetable.entry_validate_func = gxv_morx_subtable_type5_entry_validate; + gxv_XStateTable_validate( p, limit, valid ); + GXV_EXIT; + } + + +/* END */ |