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Unified Diff: third_party/freetype2/src/src/gxvalid/gxvmorx2.c

Issue 1524973002: Update freetype sources (2.6.2) in third party. (Closed) Base URL: https://github.com/domokit/mojo.git@master
Patch Set: Created 5 years ago
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Index: third_party/freetype2/src/src/gxvalid/gxvmorx2.c
diff --git a/third_party/freetype2/src/src/gxvalid/gxvmorx2.c b/third_party/freetype2/src/src/gxvalid/gxvmorx2.c
new file mode 100644
index 0000000000000000000000000000000000000000..51e305580f5f83c08609ed3a7800c881d12d6af3
--- /dev/null
+++ b/third_party/freetype2/src/src/gxvalid/gxvmorx2.c
@@ -0,0 +1,331 @@
+/***************************************************************************/
+/* */
+/* gxvmorx2.c */
+/* */
+/* TrueTypeGX/AAT morx table validation */
+/* body for type2 (Ligature Substitution) subtable. */
+/* */
+/* Copyright 2005-2015 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_type2_StateOptRec_
+ {
+ FT_ULong ligActionTable;
+ FT_ULong componentTable;
+ FT_ULong ligatureTable;
+ FT_ULong ligActionTable_length;
+ FT_ULong componentTable_length;
+ FT_ULong ligatureTable_length;
+
+ } GXV_morx_subtable_type2_StateOptRec,
+ *GXV_morx_subtable_type2_StateOptRecData;
+
+
+#define GXV_MORX_SUBTABLE_TYPE2_HEADER_SIZE \
+ ( GXV_XSTATETABLE_HEADER_SIZE + 4 + 4 + 4 )
+
+
+ static void
+ gxv_morx_subtable_type2_opttable_load( FT_Bytes table,
+ FT_Bytes limit,
+ GXV_Validator gxvalid )
+ {
+ FT_Bytes p = table;
+
+ GXV_morx_subtable_type2_StateOptRecData optdata =
+ (GXV_morx_subtable_type2_StateOptRecData)gxvalid->xstatetable.optdata;
+
+
+ GXV_LIMIT_CHECK( 4 + 4 + 4 );
+ optdata->ligActionTable = FT_NEXT_ULONG( p );
+ optdata->componentTable = FT_NEXT_ULONG( p );
+ optdata->ligatureTable = FT_NEXT_ULONG( p );
+
+ GXV_TRACE(( "offset to ligActionTable=0x%08x\n",
+ optdata->ligActionTable ));
+ GXV_TRACE(( "offset to componentTable=0x%08x\n",
+ optdata->componentTable ));
+ GXV_TRACE(( "offset to ligatureTable=0x%08x\n",
+ optdata->ligatureTable ));
+ }
+
+
+ static void
+ gxv_morx_subtable_type2_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[6];
+ FT_ULong* l[6];
+ FT_ULong buff[7];
+
+ GXV_morx_subtable_type2_StateOptRecData optdata =
+ (GXV_morx_subtable_type2_StateOptRecData)gxvalid->xstatetable.optdata;
+
+
+ GXV_NAME_ENTER( "subtable boundaries setup" );
+
+ o[0] = classTable;
+ o[1] = stateArray;
+ o[2] = entryTable;
+ o[3] = optdata->ligActionTable;
+ o[4] = optdata->componentTable;
+ o[5] = optdata->ligatureTable;
+ l[0] = classTable_length_p;
+ l[1] = stateArray_length_p;
+ l[2] = entryTable_length_p;
+ l[3] = &(optdata->ligActionTable_length);
+ l[4] = &(optdata->componentTable_length);
+ l[5] = &(optdata->ligatureTable_length);
+
+ gxv_set_length_by_ulong_offset( o, l, buff, 6, table_size, gxvalid );
+
+ GXV_TRACE(( "classTable: offset=0x%08x length=0x%08x\n",
+ classTable, *classTable_length_p ));
+ GXV_TRACE(( "stateArray: offset=0x%08x length=0x%08x\n",
+ stateArray, *stateArray_length_p ));
+ GXV_TRACE(( "entryTable: offset=0x%08x length=0x%08x\n",
+ entryTable, *entryTable_length_p ));
+ GXV_TRACE(( "ligActionTable: offset=0x%08x length=0x%08x\n",
+ optdata->ligActionTable,
+ optdata->ligActionTable_length ));
+ GXV_TRACE(( "componentTable: offset=0x%08x length=0x%08x\n",
+ optdata->componentTable,
+ optdata->componentTable_length ));
+ GXV_TRACE(( "ligatureTable: offset=0x%08x length=0x%08x\n",
+ optdata->ligatureTable,
+ optdata->ligatureTable_length ));
+
+ GXV_EXIT;
+ }
+
+
+#define GXV_MORX_LIGACTION_ENTRY_SIZE 4
+
+
+ static void
+ gxv_morx_subtable_type2_ligActionIndex_validate(
+ FT_Bytes table,
+ FT_UShort ligActionIndex,
+ GXV_Validator gxvalid )
+ {
+ /* access ligActionTable */
+ GXV_morx_subtable_type2_StateOptRecData optdata =
+ (GXV_morx_subtable_type2_StateOptRecData)gxvalid->xstatetable.optdata;
+
+ FT_Bytes lat_base = table + optdata->ligActionTable;
+ FT_Bytes p = lat_base +
+ ligActionIndex * GXV_MORX_LIGACTION_ENTRY_SIZE;
+ FT_Bytes lat_limit = lat_base + optdata->ligActionTable;
+
+
+ if ( p < lat_base )
+ {
+ GXV_TRACE(( "p < lat_base (%d byte rewind)\n", lat_base - p ));
+ FT_INVALID_OFFSET;
+ }
+ else if ( lat_limit < p )
+ {
+ GXV_TRACE(( "lat_limit < p (%d byte overrun)\n", p - lat_limit ));
+ FT_INVALID_OFFSET;
+ }
+
+ {
+ /* validate entry in ligActionTable */
+ FT_ULong lig_action;
+#ifdef GXV_LOAD_UNUSED_VARS
+ FT_UShort last;
+ FT_UShort store;
+#endif
+ FT_ULong offset;
+ FT_Long gid_limit;
+
+
+ lig_action = FT_NEXT_ULONG( p );
+#ifdef GXV_LOAD_UNUSED_VARS
+ last = (FT_UShort)( ( lig_action >> 31 ) & 1 );
+ store = (FT_UShort)( ( lig_action >> 30 ) & 1 );
+#endif
+
+ offset = lig_action & 0x3FFFFFFFUL;
+
+ /* this offset is 30-bit signed value to add to GID */
+ /* it is different from the location offset in mort */
+ if ( ( offset & 0x3FFF0000UL ) == 0x3FFF0000UL )
+ { /* negative offset */
+ gid_limit = gxvalid->face->num_glyphs -
+ (FT_Long)( offset & 0x0000FFFFUL );
+ if ( gid_limit > 0 )
+ return;
+
+ GXV_TRACE(( "ligature action table includes"
+ " too negative offset moving all GID"
+ " below defined range: 0x%04x\n",
+ offset & 0xFFFFU ));
+ GXV_SET_ERR_IF_PARANOID( FT_INVALID_OFFSET );
+ }
+ else if ( ( offset & 0x3FFF0000UL ) == 0x00000000UL )
+ { /* positive offset */
+ if ( (FT_Long)offset < gxvalid->face->num_glyphs )
+ return;
+
+ GXV_TRACE(( "ligature action table includes"
+ " too large offset moving all GID"
+ " over defined range: 0x%04x\n",
+ offset & 0xFFFFU ));
+ GXV_SET_ERR_IF_PARANOID( FT_INVALID_OFFSET );
+ }
+
+ GXV_TRACE(( "ligature action table includes"
+ " invalid offset to add to 16-bit GID:"
+ " 0x%08x\n", offset ));
+ GXV_SET_ERR_IF_PARANOID( FT_INVALID_OFFSET );
+ }
+ }
+
+
+ static void
+ gxv_morx_subtable_type2_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_UNUSED_VARS
+ FT_UShort setComponent;
+ FT_UShort dontAdvance;
+ FT_UShort performAction;
+#endif
+ FT_UShort reserved;
+ FT_UShort ligActionIndex;
+
+ FT_UNUSED( state );
+ FT_UNUSED( limit );
+
+
+#ifdef GXV_LOAD_UNUSED_VARS
+ setComponent = (FT_UShort)( ( flags >> 15 ) & 1 );
+ dontAdvance = (FT_UShort)( ( flags >> 14 ) & 1 );
+ performAction = (FT_UShort)( ( flags >> 13 ) & 1 );
+#endif
+
+ reserved = (FT_UShort)( flags & 0x1FFF );
+ ligActionIndex = glyphOffset_p->u;
+
+ if ( reserved > 0 )
+ GXV_TRACE(( " reserved 14bit is non-zero\n" ));
+
+ if ( 0 < ligActionIndex )
+ gxv_morx_subtable_type2_ligActionIndex_validate(
+ table, ligActionIndex, gxvalid );
+ }
+
+
+ static void
+ gxv_morx_subtable_type2_ligatureTable_validate( FT_Bytes table,
+ GXV_Validator gxvalid )
+ {
+ GXV_morx_subtable_type2_StateOptRecData optdata =
+ (GXV_morx_subtable_type2_StateOptRecData)gxvalid->xstatetable.optdata;
+
+ FT_Bytes p = table + optdata->ligatureTable;
+ FT_Bytes limit = table + optdata->ligatureTable
+ + optdata->ligatureTable_length;
+
+
+ GXV_NAME_ENTER( "morx chain subtable type2 - substitutionTable" );
+
+ if ( 0 != optdata->ligatureTable )
+ {
+ /* Apple does not give specification of ligatureTable format */
+ while ( p < limit )
+ {
+ FT_UShort lig_gid;
+
+
+ GXV_LIMIT_CHECK( 2 );
+ lig_gid = FT_NEXT_USHORT( p );
+ if ( lig_gid < gxvalid->face->num_glyphs )
+ GXV_SET_ERR_IF_PARANOID( FT_INVALID_GLYPH_ID );
+ }
+ }
+
+ GXV_EXIT;
+ }
+
+
+ FT_LOCAL_DEF( void )
+ gxv_morx_subtable_type2_validate( FT_Bytes table,
+ FT_Bytes limit,
+ GXV_Validator gxvalid )
+ {
+ FT_Bytes p = table;
+
+ GXV_morx_subtable_type2_StateOptRec lig_rec;
+
+
+ GXV_NAME_ENTER( "morx chain subtable type2 (Ligature Substitution)" );
+
+ GXV_LIMIT_CHECK( GXV_MORX_SUBTABLE_TYPE2_HEADER_SIZE );
+
+ gxvalid->xstatetable.optdata =
+ &lig_rec;
+ gxvalid->xstatetable.optdata_load_func =
+ gxv_morx_subtable_type2_opttable_load;
+ gxvalid->xstatetable.subtable_setup_func =
+ gxv_morx_subtable_type2_subtable_setup;
+ gxvalid->xstatetable.entry_glyphoffset_fmt =
+ GXV_GLYPHOFFSET_USHORT;
+ gxvalid->xstatetable.entry_validate_func =
+ gxv_morx_subtable_type2_entry_validate;
+
+ gxv_XStateTable_validate( p, limit, gxvalid );
+
+#if 0
+ p += gxvalid->subtable_length;
+#endif
+ gxv_morx_subtable_type2_ligatureTable_validate( table, gxvalid );
+
+ GXV_EXIT;
+ }
+
+
+/* END */
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