diff options
Diffstat (limited to 'src/gxvalid/gxvmort0.c')
| -rw-r--r-- | src/gxvalid/gxvmort0.c | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/src/gxvalid/gxvmort0.c b/src/gxvalid/gxvmort0.c new file mode 100644 index 000000000..4764ed00d --- /dev/null +++ b/src/gxvalid/gxvmort0.c @@ -0,0 +1,122 @@ +/***************************************************************************/ +/* */ +/* gxvmort0.c */ +/* */ +/* TrueTypeGX/AAT mort table validation */ +/* body for type0 (Indic Script Rearrangement) 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 "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 + + + static char* GXV_Mort_IndicScript_Msg [] = + { + "no change", + "Ax => xA", + "xD => Dx", + "AxD => DxA", + "ABx => xAB", + "ABx => xBA", + "xCD => CDx", + "xCD => DCx", + "AxCD => CDxA", + "AxCD => DCxA", + "ABxD => DxAB", + "ABxD => DxBA", + "ABxCD => CDxAB", + "ABxCD => CDxBA", + "ABxCD => DCxAB", + "ABxCD => DCxBA", + + }; + + + static void + gxv_mort_subtable_type0_entry_validate( FT_Byte state, + FT_UShort flags, + GXV_StateTable_GlyphOffsetDesc glyphOffset, + FT_Bytes table, + FT_Bytes limit, + GXV_Validator valid ) + { + FT_UShort markFirst; + FT_UShort dontAdvance; + FT_UShort markLast; + FT_UShort reserved; + FT_UShort verb; + + + markFirst = flags / 0x8000; + dontAdvance = ( flags & 0x4000 ) / 0x4000; + markLast = ( flags & 0x2000 ) / 0x2000; + reserved = flags & 0x1FF0; + verb = flags & 0x000F; + + FT_UNUSED( GXV_Mort_IndicScript_Msg[verb] ); + + GXV_TRACE(( " IndicScript MorphRule for glyphOffset 0x%04x", glyphOffset.u )); + GXV_TRACE(( " markFirst=%01d", markFirst )); + GXV_TRACE(( " dontAdvance=%01d", dontAdvance )); + GXV_TRACE(( " markLast=%01d", markLast )); + GXV_TRACE(( " %02d", verb )); + GXV_TRACE(( " %s\n", GXV_Mort_IndicScript_Msg[verb] )); + if ( 0 < reserved ) + { + GXV_TRACE(( " non-zero bits found in reserved range\n" )); + FT_INVALID_DATA; + } + else + { + GXV_TRACE(( "\n" )); + } + } + + static void + gxv_mort_subtable_type0_validate( FT_Bytes table, + FT_Bytes limit, + GXV_Validator valid ) + { + FT_Bytes p = table; + + + GXV_NAME_ENTER( "mort chain subtable type0 (Indic-Script Rearrangement)" ); + + GXV_LIMIT_CHECK( GXV_STATETABLE_HEADER_SIZE ); + + valid->statetable.optdata = NULL; + valid->statetable.optdata_load_func = NULL; + valid->statetable.subtable_setup_func = NULL; + valid->statetable.entry_glyphoffset_fmt = GXV_GLYPHOFFSET_NONE; + valid->statetable.entry_validate_func = gxv_mort_subtable_type0_entry_validate; + gxv_StateTable_validate( p, limit, valid ); + GXV_EXIT; + } + + +/* END */ |