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Branched from the monolithic repo, Qt master branch, at commit
896db169ea224deb96c59ce8af800d019de63f12

1 files changed, 285 insertions, 0 deletions

diff --git a/src/3rdparty/freetype/src/gxvalid/gxvmorx2.c b/src/3rdparty/freetype/src/gxvalid/gxvmorx2.c
new file mode 100644
index 0000000000..5cad5169c2
--- /dev/null
+++ b/src/3rdparty/freetype/src/gxvalid/gxvmorx2.c
@@ -0,0 +1,285 @@
+/***************************************************************************/
+/*                                                                         */
+/*  gxvmorx2.c                                                             */
+/*                                                                         */
+/*    TrueTypeGX/AAT morx table validation                                 */
+/*    body for type2 (Ligature Substitution) 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 "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  valid )
+  {
+    FT_Bytes  p = table;
+
+    GXV_morx_subtable_type2_StateOptRecData  optdata =
+      (GXV_morx_subtable_type2_StateOptRecData)valid->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  valid )
+  {
+    FT_ULong   o[6];
+    FT_ULong*  l[6];
+    FT_ULong   buff[7];
+
+    GXV_morx_subtable_type2_StateOptRecData  optdata =
+      (GXV_morx_subtable_type2_StateOptRecData)valid->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, valid );
+
+    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  valid )
+  {
+    /* access ligActionTable */
+    GXV_morx_subtable_type2_StateOptRecData optdata =
+      (GXV_morx_subtable_type2_StateOptRecData)valid->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;
+      FT_UShort  last;
+      FT_UShort  store;
+      FT_ULong   offset;
+
+
+      lig_action = FT_NEXT_ULONG( p );
+      last       = (FT_UShort)( ( lig_action >> 31 ) & 1 );
+      store      = (FT_UShort)( ( lig_action >> 30 ) & 1 );
+
+      offset = lig_action & 0x3FFFFFFFUL;
+    }
+  }
+
+
+  static void
+  gxv_morx_subtable_type2_entry_validate(
+    FT_UShort                       state,
+    FT_UShort                       flags,
+    GXV_StateTable_GlyphOffsetDesc  glyphOffset,
+    FT_Bytes                        table,
+    FT_Bytes                        limit,
+    GXV_Validator                   valid )
+  {
+    FT_UShort  setComponent;
+    FT_UShort  dontAdvance;
+    FT_UShort  performAction;
+    FT_UShort  reserved;
+    FT_UShort  ligActionIndex;
+
+    FT_UNUSED( state );
+    FT_UNUSED( limit );
+
+
+    setComponent   = (FT_UShort)( ( flags >> 15 ) & 1 );
+    dontAdvance    = (FT_UShort)( ( flags >> 14 ) & 1 );
+    performAction  = (FT_UShort)( ( flags >> 13 ) & 1 );
+
+    reserved       = (FT_UShort)( flags & 0x1FFF );
+    ligActionIndex = glyphOffset.u;
+
+    if ( reserved > 0 )
+      GXV_TRACE(( "  reserved 14bit is non-zero\n" ));
+
+    if ( 0 < ligActionIndex )
+      gxv_morx_subtable_type2_ligActionIndex_validate(
+        table, ligActionIndex, valid );
+  }
+
+
+  static void
+  gxv_morx_subtable_type2_ligatureTable_validate( FT_Bytes       table,
+                                                  GXV_Validator  valid )
+  {
+    GXV_morx_subtable_type2_StateOptRecData  optdata =
+      (GXV_morx_subtable_type2_StateOptRecData)valid->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 );
+      }
+    }
+
+    GXV_EXIT;
+  }
+
+
+  FT_LOCAL_DEF( void )
+  gxv_morx_subtable_type2_validate( FT_Bytes       table,
+                                    FT_Bytes       limit,
+                                    GXV_Validator  valid )
+  {
+    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 );
+
+    valid->xstatetable.optdata =
+      &lig_rec;
+    valid->xstatetable.optdata_load_func =
+      gxv_morx_subtable_type2_opttable_load;
+    valid->xstatetable.subtable_setup_func =
+      gxv_morx_subtable_type2_subtable_setup;
+    valid->xstatetable.entry_glyphoffset_fmt =
+      GXV_GLYPHOFFSET_USHORT;
+    valid->xstatetable.entry_validate_func =
+      gxv_morx_subtable_type2_entry_validate;
+
+    gxv_XStateTable_validate( p, limit, valid );
+
+    p += valid->subtable_length;
+    gxv_morx_subtable_type2_ligatureTable_validate( table, valid );
+
+    GXV_EXIT;
+  }
+
+
+/* END */