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

Branch : - branch - master v2.13 - tag -

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  Commit

• Author : David Turner
  Date : 2002-05-04 18:02:59
  Hash : 8cd89073
  Message : * src/truetype/ttgload.c (TT_Load_Glyph): finally fixing the last bug that prevented FreeType 2.x and FreeType 1.x to produce bit-by-bit identical monochrome glyph bitmaps with native TrueType hinting. The culprit was a single-bit flag that wasn't set correctly by the TrueType glyph loader !! * src/otlayout/otlayout.h, src/otlayout/otlbase.c, src/otlayout/otlbase.h, src/otlayout/otlconf.h, src/otlayout/otlgdef.c, src/otlayout/otlgdef.h, src/otlayout/otlgpos.c, src/otlayout/otlgpos.h, src/otlayout/otlgsub.c, src/otlayout/otlgsub.h, src/otlayout/otljstf.c, src/otlayout/otljstf.h, src/otlayout/otltable.c, src/otlayout/otltable.h, src/otlayout/otltags.h: adding OpenType Layout source files. Module is still incomplete

• src/otlayout/otlbase.c

• #include "otlbase.h"
  #include "otlcommn.h"
  
    static void
    otl_base_coord_validate( OTL_Bytes      table,
                             OTL_Validator  valid )
    {
      OTL_Bytes  p = table;
      OTL_UInt   format;
  
      OTL_CHECK( 4 );
  
      format = OTL_NEXT_USHORT( p );
      p += 2;
  
      switch ( format )
      {
        case 1:
          break;
  
        case 2:
          OTL_CHECK( 4 );
          break;
  
        case 3:
          OTL_CHECK( 2 );
          otl_device_table_validate( table + OTL_PEEK_USHORT( p ) );
          break;
  
        default:
          OTL_INVALID_DATA;
      }
    }
  
  
    static void
    otl_base_tag_list_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*4 );
    }
  
  
  
    static void
    otl_base_values_validate( OTL_Bytes      table,
                              OTL_Validator  valid )
    {
      OTL_Bytes  p = table;
      OTL_UInt   count;
  
      OTL_CHECK( 4 );
  
      p    += 2;  /* skip default index */
      count = OTL_NEXT_USHORT( p );
  
      OTL_CHECK( count*2 );
  
      for ( ; count > 0; count-- )
        otl_base_coord_validate( table + OTL_NEXT_USHORT( p ), valid );
    }
  
  
    static void
    otl_base_minmax_validate( OTL_Bytes      table,
                              OTL_Validator  valid )
    {
      OTL_Bytes  p = table;
      OTL_UInt   min_coord, max_coord, count;
  
      OTL_CHECK(6);
      min_coord = OTL_NEXT_USHORT( p );
      max_coord = OTL_NEXT_USHORT( p );
      count     = OTL_NEXT_USHORT( p );
  
      if ( min_coord )
        otl_base_coord_validate( table + min_coord, valid );
  
      if ( max_coord )
        otl_base_coord_validate( table + max_coord, valid );
  
      OTL_CHECK( count*8 );
      for ( ; count > 0; count-- )
      {
        p += 4;  /* ignore tag */
        min_coord = OTL_NEXT_USHORT( p );
        max_coord = OTL_NEXT_USHORT( p );
  
        if ( min_coord )
          otl_base_coord_validate( table + min_coord, valid );
  
        if ( max_coord )
          otl_base_coord_validate( table + max_coord, valid );
      }
    }
  
  
    static void
    otl_base_script_validate( OTL_Bytes      table,
                              OTL_Validator  valid )
    {
      OTL_Bytes  p = table;
      OTL_UInt   values, default_minmax;
  
      OTL_CHECK(6);
  
      values         = OTL_NEXT_USHORT( p );
      default_minmax = OTL_NEXT_USHORT( p );
      count          = OTL_NEXT_USHORT( p );
  
      if ( values )
        otl_base_values_validate( table + values, valid );
  
      if ( default_minmax )
        otl_base_minmax_validate( table + default_minmax, valid );
  
      OTL_CHECK( count*6 );
      for ( ; count > 0; count-- )
      {
        p += 4;  /* ignore tag */
        otl_base_minmax_validate( table + OTL_NEXT_USHORT( p ), valid );
      }
    }
  
  
    static void
    otl_base_script_list_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*6);
  
      for ( ; count > 0; count-- )
      {
        p += 4;  /* ignore script tag */
        otl_base_script_validate( table + OTL_NEXT_USHORT( p ) );
      }
    }
  
    static void
    otl_axis_table_validate( OTL_Bytes      table,
                             OTL_Validator  valid )
    {
      OTL_Bytes  p = table;
      OTL_UInt   tags;
  
      OTL_CHECK(4);
  
      tags = OTL_NEXT_USHORT( p );
      if ( tags )
        otl_base_tag_list_validate   ( table + tags );
  
      otl_base_script_list_validate( table + OTL_NEXT_USHORT( p ) );
    }
  
  
    OTL_LOCALDEF( void )
    otl_base_validate( OTL_Bytes      table,
                       OTL_Validator  valid )
    {
      OTL_Bytes p = table;
  
      OTL_CHECK(6);
  
      if ( OTL_NEXT_ULONG( p ) != 0x10000UL )
        OTL_INVALID_DATA;
  
      otl_axis_table_validate( table + OTL_NEXT_USHORT( p ) );
      otl_axis_table_validate( table + OTL_NEXT_USHORT( p ) );
    }