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Diffstat (limited to 'src/gxvalid/gxvjust.c')
| -rw-r--r-- | src/gxvalid/gxvjust.c | 630 |
1 files changed, 0 insertions, 630 deletions
diff --git a/src/gxvalid/gxvjust.c b/src/gxvalid/gxvjust.c deleted file mode 100644 index 29bf840..0000000 --- a/src/gxvalid/gxvjust.c +++ /dev/null @@ -1,630 +0,0 @@ -/***************************************************************************/ -/* */ -/* gxvjust.c */ -/* */ -/* TrueTypeGX/AAT just table validation (body). */ -/* */ -/* 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 "gxvalid.h" -#include "gxvcommn.h" - -#include FT_SFNT_NAMES_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_gxvjust - - /* - * referred `just' table format specification: - * http://developer.apple.com/fonts/TTRefMan/RM06/Chap6just.html - * last updated 2000. - * ---------------------------------------------- - * [JUST HEADER]: GXV_JUST_HEADER_SIZE - * version (fixed: 32bit) = 0x00010000 - * format (uint16: 16bit) = 0 is only defined (2000) - * horizOffset (uint16: 16bit) - * vertOffset (uint16: 16bit) - * ---------------------------------------------- - */ - - typedef struct GXV_just_DataRec_ - { - FT_UShort wdc_offset_max; - FT_UShort wdc_offset_min; - FT_UShort pc_offset_max; - FT_UShort pc_offset_min; - - } GXV_just_DataRec, *GXV_just_Data; - - -#define GXV_JUST_DATA( a ) GXV_TABLE_DATA( just, a ) - - - static void - gxv_just_wdp_entry_validate( FT_Bytes table, - FT_Bytes limit, - GXV_Validator valid ) - { - FT_Bytes p = table; - FT_ULong justClass; - FT_Fixed beforeGrowLimit; - FT_Fixed beforeShrinkGrowLimit; - FT_Fixed afterGrowLimit; - FT_Fixed afterShrinkGrowLimit; - FT_UShort growFlags; - FT_UShort shrinkFlags; - - - GXV_LIMIT_CHECK( 4 + 4 + 4 + 4 + 4 + 2 + 2 ); - justClass = FT_NEXT_ULONG( p ); - beforeGrowLimit = FT_NEXT_ULONG( p ); - beforeShrinkGrowLimit = FT_NEXT_ULONG( p ); - afterGrowLimit = FT_NEXT_ULONG( p ); - afterShrinkGrowLimit = FT_NEXT_ULONG( p ); - growFlags = FT_NEXT_USHORT( p ); - shrinkFlags = FT_NEXT_USHORT( p ); - - /* TODO: decode flags for human readability */ - - valid->subtable_length = p - table; - } - - - static void - gxv_just_wdc_entry_validate( FT_Bytes table, - FT_Bytes limit, - GXV_Validator valid ) - { - FT_Bytes p = table; - FT_ULong count, i; - - - GXV_LIMIT_CHECK( 4 ); - count = FT_NEXT_ULONG( p ); - for ( i = 0; i < count; i++ ) - { - GXV_TRACE(( "validating wdc pair %d/%d\n", i + 1, count )); - gxv_just_wdp_entry_validate( p, limit, valid ); - p += valid->subtable_length; - } - - valid->subtable_length = p - table; - } - - - static void - gxv_just_widthDeltaClusters_validate( FT_Bytes table, - FT_Bytes limit, - GXV_Validator valid ) - { - FT_Bytes p = table ; - FT_Bytes wdc_end = table + GXV_JUST_DATA( wdc_offset_max ); - FT_UInt i; - - - GXV_NAME_ENTER( "just justDeltaClusters" ); - - if ( limit <= wdc_end ) - FT_INVALID_OFFSET; - - for ( i = 0; p <= wdc_end; i++ ) - { - gxv_just_wdc_entry_validate( p, limit, valid ); - p += valid->subtable_length; - } - - valid->subtable_length = p - table; - - GXV_EXIT; - } - - - static void - gxv_just_actSubrecord_type0_validate( FT_Bytes table, - FT_Bytes limit, - GXV_Validator valid ) - { - FT_Bytes p = table; - - FT_Fixed lowerLimit; - FT_Fixed upperLimit; - - FT_UShort order; - FT_UShort decomposedCount; - - FT_UInt i; - - - GXV_LIMIT_CHECK( 4 + 4 + 2 + 2 ); - lowerLimit = FT_NEXT_ULONG( p ); - upperLimit = FT_NEXT_ULONG( p ); - order = FT_NEXT_USHORT( p ); - decomposedCount = FT_NEXT_USHORT( p ); - - for ( i = 0; i < decomposedCount; i++ ) - { - FT_UShort glyphs; - - - GXV_LIMIT_CHECK( 2 ); - glyphs = FT_NEXT_USHORT( p ); - } - - valid->subtable_length = p - table; - } - - - static void - gxv_just_actSubrecord_type1_validate( FT_Bytes table, - FT_Bytes limit, - GXV_Validator valid ) - { - FT_Bytes p = table; - FT_UShort addGlyph; - - - GXV_LIMIT_CHECK( 2 ); - addGlyph = FT_NEXT_USHORT( p ); - - valid->subtable_length = p - table; - } - - - static void - gxv_just_actSubrecord_type2_validate( FT_Bytes table, - FT_Bytes limit, - GXV_Validator valid ) - { - FT_Bytes p = table; - FT_Fixed substThreshhold; /* Apple misspelled "Threshhold" */ - FT_UShort addGlyph; - FT_UShort substGlyph; - - - GXV_LIMIT_CHECK( 4 + 2 + 2 ); - substThreshhold = FT_NEXT_ULONG( p ); - addGlyph = FT_NEXT_USHORT( p ); - substGlyph = FT_NEXT_USHORT( p ); - - valid->subtable_length = p - table; - } - - - static void - gxv_just_actSubrecord_type4_validate( FT_Bytes table, - FT_Bytes limit, - GXV_Validator valid ) - { - FT_Bytes p = table; - FT_ULong variantsAxis; - FT_Fixed minimumLimit; - FT_Fixed noStretchValue; - FT_Fixed maximumLimit; - - - GXV_LIMIT_CHECK( 4 + 4 + 4 + 4 ); - variantsAxis = FT_NEXT_ULONG( p ); - minimumLimit = FT_NEXT_ULONG( p ); - noStretchValue = FT_NEXT_ULONG( p ); - maximumLimit = FT_NEXT_ULONG( p ); - - valid->subtable_length = p - table; - } - - - static void - gxv_just_actSubrecord_type5_validate( FT_Bytes table, - FT_Bytes limit, - GXV_Validator valid ) - { - FT_Bytes p = table; - FT_UShort flags; - FT_UShort glyph; - - - GXV_LIMIT_CHECK( 2 + 2 ); - flags = FT_NEXT_USHORT( p ); - glyph = FT_NEXT_USHORT( p ); - - valid->subtable_length = p - table; - } - - - /* parse single actSubrecord */ - static void - gxv_just_actSubrecord_validate( FT_Bytes table, - FT_Bytes limit, - GXV_Validator valid ) - { - FT_Bytes p = table; - FT_UShort actionClass; - FT_UShort actionType; - FT_ULong actionLength; - - - GXV_NAME_ENTER( "just actSubrecord" ); - - GXV_LIMIT_CHECK( 2 + 2 + 4 ); - actionClass = FT_NEXT_USHORT( p ); - actionType = FT_NEXT_USHORT( p ); - actionLength = FT_NEXT_ULONG( p ); - - if ( actionType == 0 ) - gxv_just_actSubrecord_type0_validate( p, limit, valid ); - else if ( actionType == 1 ) - gxv_just_actSubrecord_type1_validate( p, limit, valid ); - else if ( actionType == 2 ) - gxv_just_actSubrecord_type2_validate( p, limit, valid ); - else if ( actionType == 3 ) - ; /* Stretch glyph action: no actionData */ - else if ( actionType == 4 ) - gxv_just_actSubrecord_type4_validate( p, limit, valid ); - else if ( actionType == 5 ) - gxv_just_actSubrecord_type5_validate( p, limit, valid ); - else - FT_INVALID_DATA; - - valid->subtable_length = actionLength; - - GXV_EXIT; - } - - - static void - gxv_just_pcActionRecord_validate( FT_Bytes table, - FT_Bytes limit, - GXV_Validator valid ) - { - FT_Bytes p = table; - FT_ULong actionCount; - FT_ULong i; - - - GXV_LIMIT_CHECK( 4 ); - actionCount = FT_NEXT_ULONG( p ); - GXV_TRACE(( "actionCount = %d\n", actionCount )); - - for ( i = 0; i < actionCount; i++ ) - { - gxv_just_actSubrecord_validate( p, limit, valid ); - p += valid->subtable_length; - } - - valid->subtable_length = p - table; - - GXV_EXIT; - } - - - static void - gxv_just_pcTable_LookupValue_entry_validate( FT_UShort glyph, - GXV_LookupValueDesc value, - GXV_Validator valid ) - { - FT_UNUSED( glyph ); - - if ( value.u > GXV_JUST_DATA( pc_offset_max ) ) - GXV_JUST_DATA( pc_offset_max ) = value.u; - if ( value.u < GXV_JUST_DATA( pc_offset_max ) ) - GXV_JUST_DATA( pc_offset_min ) = value.u; - } - - - static void - gxv_just_pcLookupTable_validate( FT_Bytes table, - FT_Bytes limit, - GXV_Validator valid ) - { - FT_Bytes p = table; - - - GXV_NAME_ENTER( "just pcLookupTable" ); - GXV_JUST_DATA( pc_offset_max ) = 0x0000; - GXV_JUST_DATA( pc_offset_min ) = 0xFFFFU; - - valid->lookupval_sign = GXV_LOOKUPVALUE_UNSIGNED; - valid->lookupval_func = gxv_just_pcTable_LookupValue_entry_validate; - - gxv_LookupTable_validate( p, limit, valid ); - - /* subtable_length is set by gxv_LookupTable_validate() */ - - GXV_EXIT; - } - - - static void - gxv_just_postcompTable_validate( FT_Bytes table, - FT_Bytes limit, - GXV_Validator valid ) - { - FT_Bytes p = table; - - - GXV_NAME_ENTER( "just postcompTable" ); - - gxv_just_pcLookupTable_validate( p, limit, valid ); - p += valid->subtable_length; - - gxv_just_pcActionRecord_validate( p, limit, valid ); - p += valid->subtable_length; - - valid->subtable_length = p - table; - - GXV_EXIT; - } - - - static void - gxv_just_classTable_entry_validate( - FT_Byte state, - FT_UShort flags, - GXV_StateTable_GlyphOffsetDesc glyphOffset, - FT_Bytes table, - FT_Bytes limit, - GXV_Validator valid ) - { - FT_UShort setMark; - FT_UShort dontAdvance; - FT_UShort markClass; - FT_UShort currentClass; - - FT_UNUSED( state ); - FT_UNUSED( glyphOffset ); - FT_UNUSED( table ); - FT_UNUSED( limit ); - FT_UNUSED( valid ); - - - setMark = (FT_UShort)( ( flags >> 15 ) & 1 ); - dontAdvance = (FT_UShort)( ( flags >> 14 ) & 1 ); - markClass = (FT_UShort)( ( flags >> 7 ) & 0x7F ); - currentClass = (FT_UShort)( flags & 0x7F ); - - /* TODO: validate markClass & currentClass */ - } - - - static void - gxv_just_justClassTable_validate ( FT_Bytes table, - FT_Bytes limit, - GXV_Validator valid ) - { - FT_Bytes p = table; - FT_UShort length; - FT_UShort coverage; - FT_ULong subFeatureFlags; - - - GXV_NAME_ENTER( "just justClassTable" ); - - GXV_LIMIT_CHECK( 2 + 2 + 4 ); - length = FT_NEXT_USHORT( p ); - coverage = FT_NEXT_USHORT( p ); - subFeatureFlags = FT_NEXT_ULONG( p ); - - GXV_TRACE(( " justClassTable: coverage = 0x%04x (%s)", - coverage, - ( 0x4000 & coverage ) == 0 ? "ascending" : "descending" )); - - 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_just_classTable_entry_validate; - - gxv_StateTable_validate( p, table + length, valid ); - - /* subtable_length is set by gxv_LookupTable_validate() */ - - GXV_EXIT; - } - - - static void - gxv_just_wdcTable_LookupValue_validate( FT_UShort glyph, - GXV_LookupValueDesc value, - GXV_Validator valid ) - { - FT_UNUSED( glyph ); - - if ( value.u > GXV_JUST_DATA( wdc_offset_max ) ) - GXV_JUST_DATA( wdc_offset_max ) = value.u; - if ( value.u < GXV_JUST_DATA( wdc_offset_min ) ) - GXV_JUST_DATA( wdc_offset_min ) = value.u; - } - - - static void - gxv_just_justData_lookuptable_validate( FT_Bytes table, - FT_Bytes limit, - GXV_Validator valid ) - { - FT_Bytes p = table; - - - GXV_JUST_DATA( wdc_offset_max ) = 0x0000; - GXV_JUST_DATA( wdc_offset_min ) = 0xFFFFU; - - valid->lookupval_sign = GXV_LOOKUPVALUE_UNSIGNED; - valid->lookupval_func = gxv_just_wdcTable_LookupValue_validate; - - gxv_LookupTable_validate( p, limit, valid ); - - /* subtable_length is set by gxv_LookupTable_validate() */ - - GXV_EXIT; - } - - - /* - * gxv_just_justData_validate() parses and validates horizData, vertData. - */ - static void - gxv_just_justData_validate( FT_Bytes table, - FT_Bytes limit, - GXV_Validator valid ) - { - /* - * following 3 offsets are measured from the start of `just' - * (which table points to), not justData - */ - FT_UShort justClassTableOffset; - FT_UShort wdcTableOffset; - FT_UShort pcTableOffset; - FT_Bytes p = table; - - GXV_ODTECT( 4, odtect ); - - - GXV_NAME_ENTER( "just justData" ); - - GXV_ODTECT_INIT( odtect ); - GXV_LIMIT_CHECK( 2 + 2 + 2 ); - justClassTableOffset = FT_NEXT_USHORT( p ); - wdcTableOffset = FT_NEXT_USHORT( p ); - pcTableOffset = FT_NEXT_USHORT( p ); - - GXV_TRACE(( " (justClassTableOffset = 0x%04x)\n", justClassTableOffset )); - GXV_TRACE(( " (wdcTableOffset = 0x%04x)\n", wdcTableOffset )); - GXV_TRACE(( " (pcTableOffset = 0x%04x)\n", pcTableOffset )); - - gxv_just_justData_lookuptable_validate( p, limit, valid ); - gxv_odtect_add_range( p, valid->subtable_length, - "just_LookupTable", odtect ); - - if ( wdcTableOffset ) - { - gxv_just_widthDeltaClusters_validate( - valid->root->base + wdcTableOffset, limit, valid ); - gxv_odtect_add_range( valid->root->base + wdcTableOffset, - valid->subtable_length, "just_wdcTable", odtect ); - } - - if ( pcTableOffset ) - { - gxv_just_postcompTable_validate( valid->root->base + pcTableOffset, - limit, valid ); - gxv_odtect_add_range( valid->root->base + pcTableOffset, - valid->subtable_length, "just_pcTable", odtect ); - } - - if ( justClassTableOffset ) - { - gxv_just_justClassTable_validate( - valid->root->base + justClassTableOffset, limit, valid ); - gxv_odtect_add_range( valid->root->base + justClassTableOffset, - valid->subtable_length, "just_justClassTable", - odtect ); - } - - gxv_odtect_validate( odtect, valid ); - - GXV_EXIT; - } - - - FT_LOCAL_DEF( void ) - gxv_just_validate( FT_Bytes table, - FT_Face face, - FT_Validator ftvalid ) - { - FT_Bytes p = table; - FT_Bytes limit = 0; - FT_UInt table_size; - - GXV_ValidatorRec validrec; - GXV_Validator valid = &validrec; - GXV_just_DataRec justrec; - GXV_just_Data just = &justrec; - - FT_ULong version; - FT_UShort format; - FT_UShort horizOffset; - FT_UShort vertOffset; - - GXV_ODTECT( 3, odtect ); - - - GXV_ODTECT_INIT( odtect ); - - valid->root = ftvalid; - valid->table_data = just; - valid->face = face; - - FT_TRACE3(( "validating `just' table\n" )); - GXV_INIT; - - limit = valid->root->limit; - table_size = limit - table; - - GXV_LIMIT_CHECK( 4 + 2 + 2 + 2 ); - version = FT_NEXT_ULONG( p ); - format = FT_NEXT_USHORT( p ); - horizOffset = FT_NEXT_USHORT( p ); - vertOffset = FT_NEXT_USHORT( p ); - gxv_odtect_add_range( table, p - table, "just header", odtect ); - - - /* Version 1.0 (always:2000) */ - GXV_TRACE(( " (version = 0x%08x)\n", version )); - if ( version != 0x00010000UL ) - FT_INVALID_FORMAT; - - /* format 0 (always:2000) */ - GXV_TRACE(( " (format = 0x%04x)\n", format )); - if ( format != 0x0000 ) - FT_INVALID_FORMAT; - - GXV_TRACE(( " (horizOffset = %d)\n", horizOffset )); - GXV_TRACE(( " (vertOffset = %d)\n", vertOffset )); - - - /* validate justData */ - if ( 0 < horizOffset ) - { - gxv_just_justData_validate( table + horizOffset, limit, valid ); - gxv_odtect_add_range( table + horizOffset, valid->subtable_length, - "horizJustData", odtect ); - } - - if ( 0 < vertOffset ) - { - gxv_just_justData_validate( table + vertOffset, limit, valid ); - gxv_odtect_add_range( table + vertOffset, valid->subtable_length, - "vertJustData", odtect ); - } - - gxv_odtect_validate( odtect, valid ); - - FT_TRACE4(( "\n" )); - } - - -/* END */ |