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

• #include "otljstf.h"
  #include "otlcommn.h"
  #include "otlgpos.h"
  
    static void
    otl_jstf_extender_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_jstf_gsub_mods_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 );
  
      /* XXX: check GSUB lookup indices */
    }
  
  
    static void
    otl_jstf_gpos_mods_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 );
  
      /* XXX: check GPOS lookup indices */
    }
  
  
    static void
    otl_jstf_max_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 );
      for ( ; count > 0; count-- )
        otl_gpos_subtable_check( table + OTL_NEXT_USHORT( p ), valid );
    }
  
  
    static void
    otl_jstf_priority_validate( OTL_Bytes      table,
                                OTL_Validator  valid )
    {
      OTL_Bytes  p = table;
      OTL_UInt   offset;
  
      OTL_CHECK( 20 );
  
      /* shrinkage GSUB enable/disable */
      val = OTL_NEXT_USHORT( p );
      if ( val )
        otl_jstf_gsub_mods_validate( table + val, valid );
  
      val = OTL_NEXT_USHORT( p );
      if ( val )
        otl_jstf_gsub_mods_validate( table + val, valid );
  
      /* shrinkage GPOS enable/disable */
      val = OTL_NEXT_USHORT( p );
      if ( val )
        otl_jstf_gpos_mods_validate( table + val, valid );
  
      val = OTL_NEXT_USHORT( p );
      if ( val )
        otl_jstf_gpos_mods_validate( table + val, valid );
  
      /* shrinkage JSTF max */
      val = OTL_NEXT_USHORT( p );
      if ( val )
        otl_jstf_max_validate( table + val, valid );
  
      /* extension GSUB enable/disable */
      val = OTL_NEXT_USHORT( p );
      if ( val )
        otl_jstf_gsub_mods_validate( table + val, valid );
  
      val = OTL_NEXT_USHORT( p );
      if ( val )
        otl_jstf_gsub_mods_validate( table + val, valid );
  
      /* extension GPOS enable/disable */
      val = OTL_NEXT_USHORT( p );
      if ( val )
        otl_jstf_gpos_mods_validate( table + val, valid );
  
      val = OTL_NEXT_USHORT( p );
      if ( val )
        otl_jstf_gpos_mods_validate( table + val, valid );
  
      /* extension JSTF max */
      val = OTL_NEXT_USHORT( p );
      if ( val )
        otl_jstf_max_validate( table + val, valid );
    }
  
    static void
    otl_jstf_lang_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 );
      for ( ; count > 0; count-- )
        otl_jstf_priority_validate( table + OTL_NEXT_USHORT( p ), valid );
    }
  
  
    static void
    otl_jstf_script_validate( OTL_Bytes      table,
                              OTL_Validator  valid )
    {
      OTL_Bytes  p = table;
      OTL_UInt   count, extender, default_lang;
  
      OTL_CHECK( 6 );
      extender     = OTL_NEXT_USHORT( p );
      default_lang = OTL_NEXT_USHORT( p );
      count        = OTL_NEXT_USHORT( p );
  
      if ( extender )
        otl_jstf_extender_validate( table + extender, valid );
  
      if ( default_lang )
        otl_jstf_lang_validate( table + default_lang, valid );
  
      OTL_CHECK( 6*count );
  
      for ( ; count > 0; count-- )
      {
        p += 4;  /* ignore tag */
        otl_jstf_lang_validate( table + OTL_NEXT_USHORT( p ), valid );
      }
    }
  
  
    OTL_LOCALDEF( void )
    otl_jstf_validate( OTL_Bytes      table,
                       OTL_Validator  valid )
    {
      OTL_Bytes  p = table;
      OTL_UInt   count;
  
      OTL_CHECK( 4 );
  
      if ( OTL_NEXT_ULONG( p ) != 0x10000UL )
        OTL_INVALID_DATA;
  
      count = OTL_NEXT_USHORT( p );
      OTL_CHECK( count*6 );
  
      for ( ; count > 0; count++ )
      {
        p += 4;  /* ignore tag */
        otl_jstf_script_validate( table + OTL_NEXT_USHORT( p ), valid );
      }
    }