misc/libfreetype/src/otvalid/otvgpos.c
author koda
Mon, 25 Apr 2011 01:46:54 +0200
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permissions -rw-r--r--
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/***************************************************************************/
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/*                                                                         */
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/*  otvgpos.c                                                              */
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/*                                                                         */
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/*    OpenType GPOS table validation (body).                               */
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/*                                                                         */
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/*  Copyright 2002, 2004, 2005, 2006, 2007, 2008 by                        */
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/*  David Turner, Robert Wilhelm, and Werner Lemberg.                      */
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/*                                                                         */
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/*  This file is part of the FreeType project, and may only be used,       */
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/*  modified, and distributed under the terms of the FreeType project      */
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/*  license, LICENSE.TXT.  By continuing to use, modify, or distribute     */
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/*  this file you indicate that you have read the license and              */
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/*  understand and accept it fully.                                        */
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/*                                                                         */
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/***************************************************************************/
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#include "otvalid.h"
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#include "otvcommn.h"
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#include "otvgpos.h"
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  /*************************************************************************/
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  /*                                                                       */
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  /* The macro FT_COMPONENT is used in trace mode.  It is an implicit      */
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  /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log  */
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  /* messages during execution.                                            */
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  /*                                                                       */
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#undef  FT_COMPONENT
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#define FT_COMPONENT  trace_otvgpos
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  static void
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  otv_Anchor_validate( FT_Bytes       table,
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                       OTV_Validator  valid );
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  static void
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  otv_MarkArray_validate( FT_Bytes       table,
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                          OTV_Validator  valid );
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  /*************************************************************************/
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  /*************************************************************************/
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  /*****                                                               *****/
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  /*****                      UTILITY FUNCTIONS                        *****/
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  /*****                                                               *****/
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  /*************************************************************************/
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  /*************************************************************************/
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#define BaseArrayFunc       otv_x_sxy
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#define LigatureAttachFunc  otv_x_sxy
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#define Mark2ArrayFunc      otv_x_sxy
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  /* uses valid->extra1 (counter)                             */
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  /* uses valid->extra2 (boolean to handle NULL anchor field) */
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  static void
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  otv_x_sxy( FT_Bytes       table,
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             OTV_Validator  valid )
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  {
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    FT_Bytes  p = table;
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    FT_UInt   Count, count1, table_size;
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    OTV_ENTER;
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    OTV_LIMIT_CHECK( 2 );
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    Count = FT_NEXT_USHORT( p );
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    OTV_TRACE(( " (Count = %d)\n", Count ));
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    OTV_LIMIT_CHECK( Count * valid->extra1 * 2 );
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    table_size = Count * valid->extra1 * 2 + 2;
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    for ( ; Count > 0; Count-- )
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      for ( count1 = valid->extra1; count1 > 0; count1-- )
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      {
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        OTV_OPTIONAL_TABLE( anchor_offset );
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        OTV_OPTIONAL_OFFSET( anchor_offset );
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        if ( valid->extra2 )
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        {
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          OTV_SIZE_CHECK( anchor_offset );
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          if ( anchor_offset )
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            otv_Anchor_validate( table + anchor_offset, valid );
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        }
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        else
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          otv_Anchor_validate( table + anchor_offset, valid );
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      }
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    OTV_EXIT;
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  }
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#define MarkBasePosFormat1Func  otv_u_O_O_u_O_O
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#define MarkLigPosFormat1Func   otv_u_O_O_u_O_O
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#define MarkMarkPosFormat1Func  otv_u_O_O_u_O_O
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  /* sets valid->extra1 (class count) */
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  static void
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  otv_u_O_O_u_O_O( FT_Bytes       table,
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                   OTV_Validator  valid )
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  {
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    FT_Bytes           p = table;
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    FT_UInt            Coverage1, Coverage2, ClassCount;
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    FT_UInt            Array1, Array2;
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    OTV_Validate_Func  func;
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    OTV_ENTER;
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    p += 2;     /* skip PosFormat */
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    OTV_LIMIT_CHECK( 10 );
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    Coverage1  = FT_NEXT_USHORT( p );
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    Coverage2  = FT_NEXT_USHORT( p );
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    ClassCount = FT_NEXT_USHORT( p );
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    Array1     = FT_NEXT_USHORT( p );
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    Array2     = FT_NEXT_USHORT( p );
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    otv_Coverage_validate( table + Coverage1, valid, -1 );
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    otv_Coverage_validate( table + Coverage2, valid, -1 );
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    otv_MarkArray_validate( table + Array1, valid );
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    valid->nesting_level++;
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    func          = valid->func[valid->nesting_level];
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    valid->extra1 = ClassCount;
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    func( table + Array2, valid );
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    valid->nesting_level--;
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    OTV_EXIT;
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  }
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  /*************************************************************************/
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  /*************************************************************************/
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  /*****                                                               *****/
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  /*****                        VALUE RECORDS                          *****/
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  /*****                                                               *****/
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  /*************************************************************************/
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  /*************************************************************************/
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  static FT_UInt
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  otv_value_length( FT_UInt  format )
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  {
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    FT_UInt  count;
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    count = ( ( format & 0xAA ) >> 1 ) + ( format & 0x55 );
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    count = ( ( count  & 0xCC ) >> 2 ) + ( count  & 0x33 );
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    count = ( ( count  & 0xF0 ) >> 4 ) + ( count  & 0x0F );
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    return count * 2;
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  }
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  /* uses valid->extra3 (pointer to base table) */
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  static void
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  otv_ValueRecord_validate( FT_Bytes       table,
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                            FT_UInt        format,
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                            OTV_Validator  valid )
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  {
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    FT_Bytes  p = table;
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    FT_UInt   count;
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#ifdef FT_DEBUG_LEVEL_TRACE
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    FT_Int    loop;
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    FT_ULong  res = 0;
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    OTV_NAME_ENTER( "ValueRecord" );
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   182
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    /* display `format' in dual representation */
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    for ( loop = 7; loop >= 0; loop-- )
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    {
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      res <<= 4;
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      res  += ( format >> loop ) & 1;
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    }
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    OTV_TRACE(( " (format 0b%08lx)\n", res ));
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#endif
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    if ( format >= 0x100 )
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      FT_INVALID_FORMAT;
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   195
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    for ( count = 4; count > 0; count-- )
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    {
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      if ( format & 1 )
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      {
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        /* XPlacement, YPlacement, XAdvance, YAdvance */
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        OTV_LIMIT_CHECK( 2 );
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        p += 2;
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      }
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   204
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      format >>= 1;
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    }
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   207
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    for ( count = 4; count > 0; count-- )
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   209
    {
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      if ( format & 1 )
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      {
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        FT_PtrDist  table_size;
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        OTV_OPTIONAL_TABLE( device );
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   216
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        /* XPlaDevice, YPlaDevice, XAdvDevice, YAdvDevice */
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        OTV_LIMIT_CHECK( 2 );
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        OTV_OPTIONAL_OFFSET( device );
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   220
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        /* XXX: this value is usually too small, especially if the current */
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        /* ValueRecord is part of an array -- getting the correct table    */
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        /* size is probably not worth the trouble                          */
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   224
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        table_size = p - valid->extra3;
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   226
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        OTV_SIZE_CHECK( device );
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   228
        if ( device )
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   229
          otv_Device_validate( valid->extra3 + device, valid );
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   230
      }
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      format >>= 1;
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   232
    }
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   233
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   234
    OTV_EXIT;
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   235
  }
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   236
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   237
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   238
  /*************************************************************************/
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  /*************************************************************************/
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   240
  /*****                                                               *****/
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   241
  /*****                           ANCHORS                             *****/
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   242
  /*****                                                               *****/
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   243
  /*************************************************************************/
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   244
  /*************************************************************************/
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   245
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   246
  static void
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   247
  otv_Anchor_validate( FT_Bytes       table,
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   248
                       OTV_Validator  valid )
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   249
  {
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   250
    FT_Bytes  p = table;
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   251
    FT_UInt   AnchorFormat;
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   252
88f2e05288ba aaand let's add freetype as well while we are at it
koda
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   253
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   254
    OTV_NAME_ENTER( "Anchor");
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   255
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   256
    OTV_LIMIT_CHECK( 6 );
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   257
    AnchorFormat = FT_NEXT_USHORT( p );
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koda
parents:
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   258
88f2e05288ba aaand let's add freetype as well while we are at it
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   259
    OTV_TRACE(( " (format %d)\n", AnchorFormat ));
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   260
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   261
    p += 4;     /* skip XCoordinate and YCoordinate */
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koda
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   262
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koda
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   263
    switch ( AnchorFormat )
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koda
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   264
    {
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   265
    case 1:
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   266
      break;
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   267
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   268
    case 2:
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   269
      OTV_LIMIT_CHECK( 2 );  /* AnchorPoint */
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   270
      break;
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parents:
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   271
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   272
    case 3:
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   273
      {
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   274
        FT_UInt   table_size;
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   275
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        OTV_OPTIONAL_TABLE( XDeviceTable );
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   277
        OTV_OPTIONAL_TABLE( YDeviceTable );
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   278
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   279
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        OTV_LIMIT_CHECK( 4 );
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   281
        OTV_OPTIONAL_OFFSET( XDeviceTable );
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koda
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   282
        OTV_OPTIONAL_OFFSET( YDeviceTable );
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   283
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   284
        table_size = 6 + 4;
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koda
parents:
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   285
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   286
        OTV_SIZE_CHECK( XDeviceTable );
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koda
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   287
        if ( XDeviceTable )
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koda
parents:
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   288
          otv_Device_validate( table + XDeviceTable, valid );
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koda
parents:
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   289
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koda
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   290
        OTV_SIZE_CHECK( YDeviceTable );
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koda
parents:
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   291
        if ( YDeviceTable )
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koda
parents:
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   292
          otv_Device_validate( table + YDeviceTable, valid );
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koda
parents:
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   293
      }
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koda
parents:
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   294
      break;
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koda
parents:
diff changeset
   295
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   296
    default:
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koda
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   297
      FT_INVALID_FORMAT;
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   298
    }
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parents:
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   299
88f2e05288ba aaand let's add freetype as well while we are at it
koda
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   300
    OTV_EXIT;
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koda
parents:
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   301
  }
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parents:
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   302
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koda
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   303
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   304
  /*************************************************************************/
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koda
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   305
  /*************************************************************************/
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koda
parents:
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   306
  /*****                                                               *****/
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koda
parents:
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   307
  /*****                         MARK ARRAYS                           *****/
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koda
parents:
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   308
  /*****                                                               *****/
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koda
parents:
diff changeset
   309
  /*************************************************************************/
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koda
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   310
  /*************************************************************************/
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koda
parents:
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   311
88f2e05288ba aaand let's add freetype as well while we are at it
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   312
  static void
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koda
parents:
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   313
  otv_MarkArray_validate( FT_Bytes       table,
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koda
parents:
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   314
                          OTV_Validator  valid )
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   315
  {
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   316
    FT_Bytes  p = table;
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koda
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   317
    FT_UInt   MarkCount;
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koda
parents:
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   318
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   319
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koda
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   320
    OTV_NAME_ENTER( "MarkArray" );
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koda
parents:
diff changeset
   321
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koda
parents:
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   322
    OTV_LIMIT_CHECK( 2 );
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koda
parents:
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   323
    MarkCount = FT_NEXT_USHORT( p );
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koda
parents:
diff changeset
   324
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
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   325
    OTV_TRACE(( " (MarkCount = %d)\n", MarkCount ));
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koda
parents:
diff changeset
   326
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
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   327
    OTV_LIMIT_CHECK( MarkCount * 4 );
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koda
parents:
diff changeset
   328
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   329
    /* MarkRecord */
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koda
parents:
diff changeset
   330
    for ( ; MarkCount > 0; MarkCount-- )
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   331
    {
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   332
      p += 2;   /* skip Class */
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   333
      /* MarkAnchor */
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   334
      otv_Anchor_validate( table + FT_NEXT_USHORT( p ), valid );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   335
    }
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   336
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   337
    OTV_EXIT;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   338
  }
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   339
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   340
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   341
  /*************************************************************************/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   342
  /*************************************************************************/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   343
  /*****                                                               *****/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   344
  /*****                     GPOS LOOKUP TYPE 1                        *****/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   345
  /*****                                                               *****/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   346
  /*************************************************************************/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   347
  /*************************************************************************/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   348
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   349
  /* sets valid->extra3 (pointer to base table) */
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   350
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   351
  static void
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   352
  otv_SinglePos_validate( FT_Bytes       table,
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   353
                          OTV_Validator  valid )
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   354
  {
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   355
    FT_Bytes  p = table;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   356
    FT_UInt   PosFormat;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   357
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   358
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   359
    OTV_NAME_ENTER( "SinglePos" );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   360
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   361
    OTV_LIMIT_CHECK( 2 );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   362
    PosFormat = FT_NEXT_USHORT( p );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   363
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   364
    OTV_TRACE(( " (format %d)\n", PosFormat ));
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   365
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   366
    valid->extra3 = table;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   367
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   368
    switch ( PosFormat )
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   369
    {
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   370
    case 1:     /* SinglePosFormat1 */
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   371
      {
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   372
        FT_UInt  Coverage, ValueFormat;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   373
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   374
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   375
        OTV_LIMIT_CHECK( 4 );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   376
        Coverage    = FT_NEXT_USHORT( p );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   377
        ValueFormat = FT_NEXT_USHORT( p );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   378
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   379
        otv_Coverage_validate( table + Coverage, valid, -1 );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   380
        otv_ValueRecord_validate( p, ValueFormat, valid ); /* Value */
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   381
      }
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   382
      break;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   383
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   384
    case 2:     /* SinglePosFormat2 */
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   385
      {
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   386
        FT_UInt  Coverage, ValueFormat, ValueCount, len_value;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   387
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   388
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   389
        OTV_LIMIT_CHECK( 6 );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   390
        Coverage    = FT_NEXT_USHORT( p );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   391
        ValueFormat = FT_NEXT_USHORT( p );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   392
        ValueCount  = FT_NEXT_USHORT( p );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   393
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   394
        OTV_TRACE(( " (ValueCount = %d)\n", ValueCount ));
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   395
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   396
        len_value = otv_value_length( ValueFormat );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   397
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   398
        otv_Coverage_validate( table + Coverage, valid, ValueCount );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   399
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   400
        OTV_LIMIT_CHECK( ValueCount * len_value );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   401
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   402
        /* Value */
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   403
        for ( ; ValueCount > 0; ValueCount-- )
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   404
        {
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   405
          otv_ValueRecord_validate( p, ValueFormat, valid );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   406
          p += len_value;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   407
        }
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   408
      }
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   409
      break;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   410
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   411
    default:
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   412
      FT_INVALID_FORMAT;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   413
    }
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   414
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   415
    OTV_EXIT;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   416
  }
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   417
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   418
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   419
  /*************************************************************************/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   420
  /*************************************************************************/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   421
  /*****                                                               *****/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   422
  /*****                     GPOS LOOKUP TYPE 2                        *****/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   423
  /*****                                                               *****/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   424
  /*************************************************************************/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   425
  /*************************************************************************/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   426
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   427
  static void
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   428
  otv_PairSet_validate( FT_Bytes       table,
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   429
                        FT_UInt        format1,
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   430
                        FT_UInt        format2,
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   431
                        OTV_Validator  valid )
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   432
  {
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   433
    FT_Bytes  p = table;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   434
    FT_UInt   value_len1, value_len2, PairValueCount;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   435
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   436
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   437
    OTV_NAME_ENTER( "PairSet" );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   438
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   439
    OTV_LIMIT_CHECK( 2 );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   440
    PairValueCount = FT_NEXT_USHORT( p );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   441
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   442
    OTV_TRACE(( " (PairValueCount = %d)\n", PairValueCount ));
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   443
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   444
    value_len1 = otv_value_length( format1 );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   445
    value_len2 = otv_value_length( format2 );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   446
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   447
    OTV_LIMIT_CHECK( PairValueCount * ( value_len1 + value_len2 + 2 ) );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   448
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   449
    /* PairValueRecord */
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   450
    for ( ; PairValueCount > 0; PairValueCount-- )
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   451
    {
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   452
      p += 2;       /* skip SecondGlyph */
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   453
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   454
      if ( format1 )
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   455
        otv_ValueRecord_validate( p, format1, valid ); /* Value1 */
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   456
      p += value_len1;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   457
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   458
      if ( format2 )
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   459
        otv_ValueRecord_validate( p, format2, valid ); /* Value2 */
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   460
      p += value_len2;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   461
    }
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   462
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   463
    OTV_EXIT;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   464
  }
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   465
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   466
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   467
  /* sets valid->extra3 (pointer to base table) */
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   468
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   469
  static void
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   470
  otv_PairPos_validate( FT_Bytes       table,
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   471
                        OTV_Validator  valid )
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   472
  {
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   473
    FT_Bytes  p = table;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   474
    FT_UInt   PosFormat;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   475
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   476
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   477
    OTV_NAME_ENTER( "PairPos" );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   478
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   479
    OTV_LIMIT_CHECK( 2 );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   480
    PosFormat = FT_NEXT_USHORT( p );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   481
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   482
    OTV_TRACE(( " (format %d)\n", PosFormat ));
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   483
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   484
    valid->extra3 = table;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   485
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   486
    switch ( PosFormat )
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   487
    {
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   488
    case 1:     /* PairPosFormat1 */
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   489
      {
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   490
        FT_UInt  Coverage, ValueFormat1, ValueFormat2, PairSetCount;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   491
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   492
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   493
        OTV_LIMIT_CHECK( 8 );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   494
        Coverage     = FT_NEXT_USHORT( p );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   495
        ValueFormat1 = FT_NEXT_USHORT( p );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   496
        ValueFormat2 = FT_NEXT_USHORT( p );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   497
        PairSetCount = FT_NEXT_USHORT( p );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   498
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   499
        OTV_TRACE(( " (PairSetCount = %d)\n", PairSetCount ));
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   500
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   501
        otv_Coverage_validate( table + Coverage, valid, -1 );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   502
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   503
        OTV_LIMIT_CHECK( PairSetCount * 2 );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   504
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   505
        /* PairSetOffset */
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   506
        for ( ; PairSetCount > 0; PairSetCount-- )
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   507
          otv_PairSet_validate( table + FT_NEXT_USHORT( p ),
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   508
                                ValueFormat1, ValueFormat2, valid );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   509
      }
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   510
      break;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   511
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   512
    case 2:     /* PairPosFormat2 */
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   513
      {
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   514
        FT_UInt  Coverage, ValueFormat1, ValueFormat2, ClassDef1, ClassDef2;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   515
        FT_UInt  ClassCount1, ClassCount2, len_value1, len_value2, count;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   516
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   517
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   518
        OTV_LIMIT_CHECK( 14 );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   519
        Coverage     = FT_NEXT_USHORT( p );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   520
        ValueFormat1 = FT_NEXT_USHORT( p );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   521
        ValueFormat2 = FT_NEXT_USHORT( p );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   522
        ClassDef1    = FT_NEXT_USHORT( p );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   523
        ClassDef2    = FT_NEXT_USHORT( p );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   524
        ClassCount1  = FT_NEXT_USHORT( p );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   525
        ClassCount2  = FT_NEXT_USHORT( p );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   526
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   527
        OTV_TRACE(( " (ClassCount1 = %d)\n", ClassCount1 ));
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   528
        OTV_TRACE(( " (ClassCount2 = %d)\n", ClassCount2 ));
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   529
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   530
        len_value1 = otv_value_length( ValueFormat1 );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   531
        len_value2 = otv_value_length( ValueFormat2 );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   532
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   533
        otv_Coverage_validate( table + Coverage, valid, -1 );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   534
        otv_ClassDef_validate( table + ClassDef1, valid );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   535
        otv_ClassDef_validate( table + ClassDef2, valid );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   536
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   537
        OTV_LIMIT_CHECK( ClassCount1 * ClassCount2 *
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   538
                     ( len_value1 + len_value2 ) );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   539
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   540
        /* Class1Record */
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   541
        for ( ; ClassCount1 > 0; ClassCount1-- )
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   542
        {
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   543
          /* Class2Record */
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   544
          for ( count = ClassCount2; count > 0; count-- )
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   545
          {
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   546
            if ( ValueFormat1 )
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   547
              /* Value1 */
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   548
              otv_ValueRecord_validate( p, ValueFormat1, valid );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   549
            p += len_value1;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   550
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   551
            if ( ValueFormat2 )
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   552
              /* Value2 */
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   553
              otv_ValueRecord_validate( p, ValueFormat2, valid );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   554
            p += len_value2;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   555
          }
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   556
        }
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   557
      }
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   558
      break;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   559
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   560
    default:
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   561
      FT_INVALID_FORMAT;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   562
    }
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   563
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   564
    OTV_EXIT;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   565
  }
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   566
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   567
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   568
  /*************************************************************************/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   569
  /*************************************************************************/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   570
  /*****                                                               *****/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   571
  /*****                     GPOS LOOKUP TYPE 3                        *****/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   572
  /*****                                                               *****/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   573
  /*************************************************************************/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   574
  /*************************************************************************/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   575
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   576
  static void
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   577
  otv_CursivePos_validate( FT_Bytes       table,
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   578
                           OTV_Validator  valid )
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   579
  {
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   580
    FT_Bytes  p = table;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   581
    FT_UInt   PosFormat;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   582
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   583
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   584
    OTV_NAME_ENTER( "CursivePos" );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   585
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   586
    OTV_LIMIT_CHECK( 2 );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   587
    PosFormat = FT_NEXT_USHORT( p );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   588
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   589
    OTV_TRACE(( " (format %d)\n", PosFormat ));
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   590
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   591
    switch ( PosFormat )
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   592
    {
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   593
    case 1:     /* CursivePosFormat1 */
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   594
      {
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   595
        FT_UInt   table_size;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   596
        FT_UInt   Coverage, EntryExitCount;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   597
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   598
        OTV_OPTIONAL_TABLE( EntryAnchor );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   599
        OTV_OPTIONAL_TABLE( ExitAnchor  );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   600
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   601
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   602
        OTV_LIMIT_CHECK( 4 );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   603
        Coverage       = FT_NEXT_USHORT( p );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   604
        EntryExitCount = FT_NEXT_USHORT( p );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   605
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   606
        OTV_TRACE(( " (EntryExitCount = %d)\n", EntryExitCount ));
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   607
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   608
        otv_Coverage_validate( table + Coverage, valid, EntryExitCount );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   609
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   610
        OTV_LIMIT_CHECK( EntryExitCount * 4 );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   611
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   612
        table_size = EntryExitCount * 4 + 4;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   613
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   614
        /* EntryExitRecord */
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   615
        for ( ; EntryExitCount > 0; EntryExitCount-- )
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   616
        {
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   617
          OTV_OPTIONAL_OFFSET( EntryAnchor );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   618
          OTV_OPTIONAL_OFFSET( ExitAnchor  );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   619
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   620
          OTV_SIZE_CHECK( EntryAnchor );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   621
          if ( EntryAnchor )
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   622
            otv_Anchor_validate( table + EntryAnchor, valid );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   623
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   624
          OTV_SIZE_CHECK( ExitAnchor );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   625
          if ( ExitAnchor )
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   626
            otv_Anchor_validate( table + ExitAnchor, valid );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   627
        }
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   628
      }
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   629
      break;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   630
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   631
    default:
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   632
      FT_INVALID_FORMAT;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   633
    }
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   634
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   635
    OTV_EXIT;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   636
  }
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   637
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   638
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   639
  /*************************************************************************/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   640
  /*************************************************************************/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   641
  /*****                                                               *****/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   642
  /*****                     GPOS LOOKUP TYPE 4                        *****/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   643
  /*****                                                               *****/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   644
  /*************************************************************************/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   645
  /*************************************************************************/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   646
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   647
  /* UNDOCUMENTED (in OpenType 1.5):              */
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   648
  /* BaseRecord tables can contain NULL pointers. */
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   649
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   650
  /* sets valid->extra2 (1) */
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   651
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   652
  static void
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   653
  otv_MarkBasePos_validate( FT_Bytes       table,
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   654
                            OTV_Validator  valid )
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   655
  {
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   656
    FT_Bytes  p = table;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   657
    FT_UInt   PosFormat;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   658
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   659
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   660
    OTV_NAME_ENTER( "MarkBasePos" );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   661
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   662
    OTV_LIMIT_CHECK( 2 );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   663
    PosFormat = FT_NEXT_USHORT( p );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   664
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   665
    OTV_TRACE(( " (format %d)\n", PosFormat ));
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   666
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   667
    switch ( PosFormat )
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   668
    {
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   669
    case 1:
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   670
      valid->extra2 = 1;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   671
      OTV_NEST2( MarkBasePosFormat1, BaseArray );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   672
      OTV_RUN( table, valid );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   673
      break;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   674
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   675
    default:
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   676
      FT_INVALID_FORMAT;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   677
    }
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   678
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   679
    OTV_EXIT;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   680
  }
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   681
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   682
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   683
  /*************************************************************************/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   684
  /*************************************************************************/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   685
  /*****                                                               *****/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   686
  /*****                     GPOS LOOKUP TYPE 5                        *****/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   687
  /*****                                                               *****/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   688
  /*************************************************************************/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   689
  /*************************************************************************/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   690
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   691
  /* sets valid->extra2 (1) */
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   692
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   693
  static void
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   694
  otv_MarkLigPos_validate( FT_Bytes       table,
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   695
                           OTV_Validator  valid )
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   696
  {
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   697
    FT_Bytes  p = table;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   698
    FT_UInt   PosFormat;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   699
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   700
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   701
    OTV_NAME_ENTER( "MarkLigPos" );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   702
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   703
    OTV_LIMIT_CHECK( 2 );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   704
    PosFormat = FT_NEXT_USHORT( p );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   705
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   706
    OTV_TRACE(( " (format %d)\n", PosFormat ));
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   707
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   708
    switch ( PosFormat )
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   709
    {
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   710
    case 1:
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   711
      valid->extra2 = 1;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   712
      OTV_NEST3( MarkLigPosFormat1, LigatureArray, LigatureAttach );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   713
      OTV_RUN( table, valid );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   714
      break;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   715
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   716
    default:
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   717
      FT_INVALID_FORMAT;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   718
    }
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   719
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   720
    OTV_EXIT;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   721
  }
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   722
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   723
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   724
  /*************************************************************************/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   725
  /*************************************************************************/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   726
  /*****                                                               *****/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   727
  /*****                     GPOS LOOKUP TYPE 6                        *****/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   728
  /*****                                                               *****/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   729
  /*************************************************************************/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   730
  /*************************************************************************/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   731
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   732
  /* sets valid->extra2 (0) */
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   733
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   734
  static void
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   735
  otv_MarkMarkPos_validate( FT_Bytes       table,
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   736
                            OTV_Validator  valid )
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   737
  {
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   738
    FT_Bytes  p = table;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   739
    FT_UInt   PosFormat;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   740
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   741
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   742
    OTV_NAME_ENTER( "MarkMarkPos" );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   743
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   744
    OTV_LIMIT_CHECK( 2 );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   745
    PosFormat = FT_NEXT_USHORT( p );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   746
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   747
    OTV_TRACE(( " (format %d)\n", PosFormat ));
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   748
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   749
    switch ( PosFormat )
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   750
    {
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   751
    case 1:
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   752
      valid->extra2 = 0;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   753
      OTV_NEST2( MarkMarkPosFormat1, Mark2Array );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   754
      OTV_RUN( table, valid );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   755
      break;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   756
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   757
    default:
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   758
      FT_INVALID_FORMAT;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   759
    }
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   760
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   761
    OTV_EXIT;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   762
  }
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   763
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   764
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   765
  /*************************************************************************/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   766
  /*************************************************************************/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   767
  /*****                                                               *****/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   768
  /*****                     GPOS LOOKUP TYPE 7                        *****/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   769
  /*****                                                               *****/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   770
  /*************************************************************************/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   771
  /*************************************************************************/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   772
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   773
  /* sets valid->extra1 (lookup count) */
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   774
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   775
  static void
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   776
  otv_ContextPos_validate( FT_Bytes       table,
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   777
                           OTV_Validator  valid )
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   778
  {
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   779
    FT_Bytes  p = table;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   780
    FT_UInt   PosFormat;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   781
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   782
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   783
    OTV_NAME_ENTER( "ContextPos" );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   784
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   785
    OTV_LIMIT_CHECK( 2 );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   786
    PosFormat = FT_NEXT_USHORT( p );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   787
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   788
    OTV_TRACE(( " (format %d)\n", PosFormat ));
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   789
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   790
    switch ( PosFormat )
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   791
    {
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   792
    case 1:
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   793
      /* no need to check glyph indices/classes used as input for these */
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   794
      /* context rules since even invalid glyph indices/classes return  */
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   795
      /* meaningful results                                             */
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   796
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   797
      valid->extra1 = valid->lookup_count;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   798
      OTV_NEST3( ContextPosFormat1, PosRuleSet, PosRule );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   799
      OTV_RUN( table, valid );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   800
      break;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   801
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   802
    case 2:
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   803
      /* no need to check glyph indices/classes used as input for these */
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   804
      /* context rules since even invalid glyph indices/classes return  */
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   805
      /* meaningful results                                             */
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   806
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   807
      OTV_NEST3( ContextPosFormat2, PosClassSet, PosClassRule );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   808
      OTV_RUN( table, valid );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   809
      break;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   810
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   811
    case 3:
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   812
      OTV_NEST1( ContextPosFormat3 );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   813
      OTV_RUN( table, valid );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   814
      break;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   815
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   816
    default:
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   817
      FT_INVALID_FORMAT;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   818
    }
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   819
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   820
    OTV_EXIT;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   821
  }
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   822
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   823
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   824
  /*************************************************************************/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   825
  /*************************************************************************/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   826
  /*****                                                               *****/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   827
  /*****                     GPOS LOOKUP TYPE 8                        *****/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   828
  /*****                                                               *****/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   829
  /*************************************************************************/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   830
  /*************************************************************************/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   831
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   832
  /* sets valid->extra1 (lookup count) */
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   833
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   834
  static void
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   835
  otv_ChainContextPos_validate( FT_Bytes       table,
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   836
                                OTV_Validator  valid )
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   837
  {
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   838
    FT_Bytes  p = table;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   839
    FT_UInt   PosFormat;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   840
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   841
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   842
    OTV_NAME_ENTER( "ChainContextPos" );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   843
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   844
    OTV_LIMIT_CHECK( 2 );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   845
    PosFormat = FT_NEXT_USHORT( p );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   846
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   847
    OTV_TRACE(( " (format %d)\n", PosFormat ));
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   848
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   849
    switch ( PosFormat )
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   850
    {
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   851
    case 1:
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   852
      /* no need to check glyph indices/classes used as input for these */
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   853
      /* context rules since even invalid glyph indices/classes return  */
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   854
      /* meaningful results                                             */
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   855
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   856
      valid->extra1 = valid->lookup_count;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   857
      OTV_NEST3( ChainContextPosFormat1,
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   858
                 ChainPosRuleSet, ChainPosRule );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   859
      OTV_RUN( table, valid );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   860
      break;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   861
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   862
    case 2:
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   863
      /* no need to check glyph indices/classes used as input for these */
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   864
      /* context rules since even invalid glyph indices/classes return  */
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   865
      /* meaningful results                                             */
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   866
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   867
      OTV_NEST3( ChainContextPosFormat2,
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   868
                 ChainPosClassSet, ChainPosClassRule );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   869
      OTV_RUN( table, valid );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   870
      break;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   871
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   872
    case 3:
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   873
      OTV_NEST1( ChainContextPosFormat3 );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   874
      OTV_RUN( table, valid );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   875
      break;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   876
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   877
    default:
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   878
      FT_INVALID_FORMAT;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   879
    }
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   880
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   881
    OTV_EXIT;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   882
  }
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   883
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   884
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   885
  /*************************************************************************/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   886
  /*************************************************************************/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   887
  /*****                                                               *****/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   888
  /*****                     GPOS LOOKUP TYPE 9                        *****/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   889
  /*****                                                               *****/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   890
  /*************************************************************************/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   891
  /*************************************************************************/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   892
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   893
  /* uses valid->type_funcs */
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   894
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   895
  static void
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   896
  otv_ExtensionPos_validate( FT_Bytes       table,
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   897
                             OTV_Validator  valid )
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   898
  {
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   899
    FT_Bytes  p = table;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   900
    FT_UInt   PosFormat;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   901
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   902
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   903
    OTV_NAME_ENTER( "ExtensionPos" );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   904
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   905
    OTV_LIMIT_CHECK( 2 );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   906
    PosFormat = FT_NEXT_USHORT( p );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   907
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   908
    OTV_TRACE(( " (format %d)\n", PosFormat ));
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   909
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   910
    switch ( PosFormat )
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   911
    {
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   912
    case 1:     /* ExtensionPosFormat1 */
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   913
      {
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   914
        FT_UInt            ExtensionLookupType;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   915
        FT_ULong           ExtensionOffset;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   916
        OTV_Validate_Func  validate;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   917
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   918
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   919
        OTV_LIMIT_CHECK( 6 );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   920
        ExtensionLookupType = FT_NEXT_USHORT( p );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   921
        ExtensionOffset     = FT_NEXT_ULONG( p );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   922
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   923
        if ( ExtensionLookupType == 0 || ExtensionLookupType >= 9 )
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   924
          FT_INVALID_DATA;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   925
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   926
        validate = valid->type_funcs[ExtensionLookupType - 1];
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   927
        validate( table + ExtensionOffset, valid );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   928
      }
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   929
      break;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   930
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   931
    default:
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   932
      FT_INVALID_FORMAT;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   933
    }
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   934
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   935
    OTV_EXIT;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   936
  }
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   937
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   938
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   939
  static const OTV_Validate_Func  otv_gpos_validate_funcs[9] =
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   940
  {
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   941
    otv_SinglePos_validate,
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   942
    otv_PairPos_validate,
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   943
    otv_CursivePos_validate,
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   944
    otv_MarkBasePos_validate,
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   945
    otv_MarkLigPos_validate,
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   946
    otv_MarkMarkPos_validate,
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   947
    otv_ContextPos_validate,
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   948
    otv_ChainContextPos_validate,
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   949
    otv_ExtensionPos_validate
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   950
  };
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   951
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   952
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   953
  /* sets valid->type_count */
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   954
  /* sets valid->type_funcs */
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   955
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   956
  FT_LOCAL_DEF( void )
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   957
  otv_GPOS_subtable_validate( FT_Bytes       table,
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   958
                              OTV_Validator  valid )
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   959
  {
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   960
    valid->type_count = 9;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   961
    valid->type_funcs = (OTV_Validate_Func*)otv_gpos_validate_funcs;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   962
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   963
    otv_Lookup_validate( table, valid );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   964
  }
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   965
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   966
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   967
  /*************************************************************************/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   968
  /*************************************************************************/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   969
  /*****                                                               *****/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   970
  /*****                          GPOS TABLE                           *****/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   971
  /*****                                                               *****/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   972
  /*************************************************************************/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   973
  /*************************************************************************/
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   974
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   975
  /* sets valid->glyph_count */
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   976
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   977
  FT_LOCAL_DEF( void )
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   978
  otv_GPOS_validate( FT_Bytes      table,
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   979
                     FT_UInt       glyph_count,
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   980
                     FT_Validator  ftvalid )
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   981
  {
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   982
    OTV_ValidatorRec  validrec;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   983
    OTV_Validator     valid = &validrec;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   984
    FT_Bytes          p     = table;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   985
    FT_UInt           ScriptList, FeatureList, LookupList;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   986
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   987
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   988
    valid->root = ftvalid;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   989
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   990
    FT_TRACE3(( "validating GPOS table\n" ));
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   991
    OTV_INIT;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   992
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   993
    OTV_LIMIT_CHECK( 10 );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   994
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   995
    if ( FT_NEXT_ULONG( p ) != 0x10000UL )      /* Version */
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   996
      FT_INVALID_FORMAT;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   997
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   998
    ScriptList  = FT_NEXT_USHORT( p );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
   999
    FeatureList = FT_NEXT_USHORT( p );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
  1000
    LookupList  = FT_NEXT_USHORT( p );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
  1001
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
  1002
    valid->type_count  = 9;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
  1003
    valid->type_funcs  = (OTV_Validate_Func*)otv_gpos_validate_funcs;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
  1004
    valid->glyph_count = glyph_count;
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
  1005
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
  1006
    otv_LookupList_validate( table + LookupList,
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
  1007
                             valid );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
  1008
    otv_FeatureList_validate( table + FeatureList, table + LookupList,
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
  1009
                              valid );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
  1010
    otv_ScriptList_validate( table + ScriptList, table + FeatureList,
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
  1011
                             valid );
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
  1012
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
  1013
    FT_TRACE4(( "\n" ));
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
  1014
  }
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
  1015
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
  1016
88f2e05288ba aaand let's add freetype as well while we are at it
koda
parents:
diff changeset
  1017
/* END */