kc3-lang/freetype/src/otlayout/otlgdef.c

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• Hash : 80ed03e2
  Author :
  Date : 2004-08-13T06:09:08
  

  * src/otlayout/otlcommn.c (otl_gsubgpos_get_lookup_count): New function. * src/otlayout/otlcommn.h: Updated. * src/otlayout/otlbase.c: Rename counting variables to be more meaningful. Add copyright message. * src/otlayout/otlbase.h: Add copyright message. * src/otlayout/otlgdef.c: Rename counting variables to be more meaningful. Add copyright message. Use OTL_CHECK everywhere. (otl_caret_value_validate): Remove unused variable. (otl_gdef_validate): All tables are optional. * src/otlayout/otlgdef.h: Add copyright message. * src/otlayout/otljstf.c: Rename counting variables to be more meaningful. Add copyright message. (otl_jstf_gsub_mods_validate, otl_jstf_gpos_mods_validate): Add parameter to pass lookup count. Update all callers. Check lookup array. (otl_jstf_max_validate): s/otl_gpos_subtable_check/otl_gpos_subtable_validate/. (otl_jstf_priority_validate, otl_jstf_lang_validate, otl_jstf_script_validate): Add two parameters to pass lookup counts. Update all callers. (otl_jstf_validate): Add two parameters to pass GPOS and GSUB table offsets; use otl_gsubgpos_get_lookup_count to convert extract lookup counts. Fix typo. * src/otlayout/otljstf.h: Updated. Add copyright message. * src/otlayout/otlgpos.c (otl_gpos_subtable_validate): New function. (otl_gpos_validate): Use it. * src/otlayout/otlgpos.h: Updated.

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• src/otlayout/otlgdef.c

• /***************************************************************************/
  /*                                                                         */
  /*  otlgdef.c                                                              */
  /*                                                                         */
  /*    OpenType layout support, GDEF table (body).                          */
  /*                                                                         */
  /*  Copyright 2002, 2004 by                                                */
  /*  David Turner, Robert Wilhelm, and Werner Lemberg.                      */
  /*                                                                         */
  /*  This file is part of the FreeType project, and may only be used,       */
  /*  modified, and distributed under the terms of the FreeType project      */
  /*  license, LICENSE.TXT.  By continuing to use, modify, or distribute     */
  /*  this file you indicate that you have read the license and              */
  /*  understand and accept it fully.                                        */
  /*                                                                         */
  /***************************************************************************/
  
  
  #include "otlgdef.h"
  #include "otlcommn.h"
  
  
    /*************************************************************************/
    /*************************************************************************/
    /*****                                                               *****/
    /*****                       ATTACHMENTS LIST                        *****/
    /*****                                                               *****/
    /*************************************************************************/
    /*************************************************************************/
  
    static void
    otl_attach_point_validate( OTL_Bytes      table,
                               OTL_Validator  valid )
    {
      OTL_Bytes  p = table;
      OTL_UInt   count;
  
  
      OTL_CHECK( 2 );
  
      count = OTL_NEXT_USHORT( p );
      OTL_CHECK( count * 2 );
    }
  
  
    static void
    otl_attach_list_validate( OTL_Bytes      table,
                              OTL_Validator  valid )
    {
      OTL_Bytes  p = table;
      OTL_Bytes  coverage;
      OTL_UInt   num_glyphs;
  
  
      OTL_CHECK( 4 );
  
      coverage   = table + OTL_NEXT_USHORT( p );
      num_glyphs = OTL_NEXT_USHORT( p );
  
      otl_coverage_validate( coverage, valid );
      if ( num_glyphs != otl_coverage_get_count( coverage ) )
        OTL_INVALID_DATA;
  
      OTL_CHECK( num_glyphs * 2 );
  
      /* scan attach point records */
      for ( ; num_glyphs > 0; num_glyphs-- )
        otl_attach_point_validate( table + OTL_NEXT_USHORT( p ), valid );
    }
  
  
    /*************************************************************************/
    /*************************************************************************/
    /*****                                                               *****/
    /*****                       LIGATURE CARETS                         *****/
    /*****                                                               *****/
    /*************************************************************************/
    /*************************************************************************/
  
    static void
    otl_caret_value_validate( OTL_Bytes      table,
                              OTL_Validator  valid )
    {
      OTL_Bytes  p = table;
      OTL_Int    format;
  
  
      OTL_CHECK( 4 );
  
      format = OTL_NEXT_USHORT( p );
      switch ( format )
      {
      case 1:
        /* skip coordinate, no test */
        break;
  
      case 2:
        /* skip contour point index, no test */
        break;
  
      case 3:
        p += 2;           /* skip coordinate */
  
        OTL_CHECK( 2 );
  
        otl_device_table_validate( table + OTL_PEEK_USHORT( p ), valid );
        break;
  
      default:
        OTL_INVALID_DATA;
      }
    }
  
  
    static void
    otl_ligature_glyph_validate( OTL_Bytes      table,
                                 OTL_Validator  valid )
    {
      OTL_Bytes  p = table;
      OTL_UInt   num_carets;
  
  
      OTL_CHECK( 2 );
      num_carets = OTL_NEXT_USHORT( p );
      OTL_CHECK( num_carets * 2 );
  
      /* scan caret value records */
      for ( ; num_carets > 0; num_carets-- )
        otl_caret_value_validate( table + OTL_NEXT_USHORT( p ), valid );
    }
  
  
    static void
    otl_ligature_caret_list_validate( OTL_Bytes      table,
                                      OTL_Validator  valid )
    {
      OTL_Bytes  p = table;
      OTL_Bytes  coverage;
      OTL_UInt   num_ligglyphs;
  
  
      OTL_CHECK( 4 );
  
      coverage      = table + OTL_NEXT_USHORT( p );
      num_ligglyphs = OTL_NEXT_USHORT( p );
  
      otl_coverage_validate( coverage, valid );
      if ( num_ligglyphs != otl_coverage_get_count( coverage ) )
        OTL_INVALID_DATA;
  
      OTL_CHECK( num_ligglyphs * 2 );
  
      /* scan ligature glyph records */
      for ( ; num_ligglyphs > 0; num_ligglyphs-- )
        otl_ligature_glyph_validate( table + OTL_NEXT_USHORT( p ), valid );
    }
  
  
    /*************************************************************************/
    /*************************************************************************/
    /*****                                                               *****/
    /*****                         GDEF TABLE                            *****/
    /*****                                                               *****/
    /*************************************************************************/
    /*************************************************************************/
  
    OTL_APIDEF( void )
    otl_gdef_validate( OTL_Bytes      table,
                       OTL_Validator  valid )
    {
      OTL_Bytes  p = table;
      OTL_UInt   val;
  
  
      OTL_CHECK( 12 );
  
      /* check format */
      if ( OTL_NEXT_ULONG( p ) != 0x00010000UL )
        OTL_INVALID_FORMAT;
  
      /* validate glyph class definition table */
      val = OTL_NEXT_USHORT( p );
      if ( val )
        otl_class_definition_validate( table + val, valid );
  
      /* validate attachment point list */
      val = OTL_NEXT_USHORT( p );
      if ( val )
        otl_attach_list_validate( table + val, valid );
  
      /* validate ligature caret list */
      val = OTL_NEXT_USHORT( p );
      if ( val )
        otl_ligature_caret_list_validate( table + val, valid );
  
      /* validate mark attachment class definition table */
      val = OTL_NEXT_USHORT( p );
      if ( val )
        otl_class_definition_validate( table + val, valid );
    }
  
  
  /* END */
  

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