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

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• Hash : 8cd89073
  Author :
  Date : 2002-05-04T18:02:59
  

  * 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

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• src/otlayout/otlgdef.c

• #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;
  
      if ( p + 2 > valid->limit )
        OTL_INVALID_TOO_SHORT;
  
      count = OTL_NEXT_USHORT( p );
      if ( table + count*2 > valid->limit )
        OTL_INVALID_TOO_SHORT;
    }
  
  
    static void
    otl_attach_list_validate( OTL_Bytes      table,
                              OTL_Validator  valid )
    {
      OTL_Bytes  p = table;
      OTL_Bytes  coverage;
      OTL_UInt   count;
  
      if ( p + 4 > valid->limit )
        OTL_INVALID_TOO_SHORT;
  
      coverage = table + OTL_NEXT_USHORT( p );
      count    = OTL_NEXT_USHORT( p );
  
      otl_coverage_validate( coverage, valid );
      if ( count != otl_coverage_get_count( coverage ) )
        OTL_INVALID_DATA;
  
      if ( p + count*2 > valid->limit )
        OTL_INVALID_TOO_SHORT;
  
      for ( ; count > 0; count-- )
        otl_attach_point_validate( table + OTL_NEXT_USHORT( p ) );
    }
  
  
   /************************************************************************/
   /************************************************************************/
   /*****                                                              *****/
   /*****                      LIGATURE CARETS                         *****/
   /*****                                                              *****/
   /************************************************************************/
   /************************************************************************/
  
    static void
    otl_caret_value_validate( OTL_Bytes      table,
                              OTL_Validator  valid )
    {
      OTL_Bytes  p = table;
  
      if ( p + 4 > valid->limit )
        OTL_INVALID_TOO_SHORT;
  
      format = OTL_NEXT_USHORT( p );
      switch ( format )
      {
        case 1:
        case 2:
          break;
  
        case 3:
          {
            OTL_Bytes  device;
  
            p += 2;
            if ( p + 2 > valid->limit )
              OTL_INVALID_TOO_SHORT;
  
            otl_device_table_validate( table + OTL_PEEK_USHORT( p ) );
          }
          break;
  
        default:
          OTL_INVALID_DATA;
      }
    }
  
  
    static void
    otl_ligature_glyph_validate( OTL_Bytes      table,
                                 OTL_Validator  valid )
    {
      OTL_Bytes  p = table;
      OTL_UInt   count;
  
      if ( p + 2 > valid->limit )
        OTL_INVALID_TOO_SHORT;
  
      count = OTL_NEXT_USHORT( p );
  
      if ( p + count*2 > valid->limit )
        OTL_INVALID_TOO_SHORT;
  
      for ( ; count > 0; count-- )
        otl_caret_value_validate( table + OTL_NEXT_USHORT( p ) );
    }
  
  
    static void
    otl_ligature_caret_list_validate( OTL_Bytes      table,
                                      OTL_Validator  valid )
    {
      OTL_Bytes  p = table;
      OTL_Bytes  coverage;
      OTL_UInt   count;
  
      if ( p + 4 > valid->limit )
        OTL_INVALID_TOO_SHORT;
  
      coverage = table + OTL_NEXT_USHORT( p );
      count    = OTL_NEXT_USHORT( p );
  
      otl_coverage_validate( coverage, valid );
      if ( count != otl_coverage_get_count( coverage ) )
        OTL_INVALID_DATA;
  
      if ( p + count*2 > valid->limit )
        OTL_INVALID_TOO_SHORT;
  
      for ( ; count > 0; count-- )
        otl_ligature_glyph_validate( table + OTL_NEXT_USHORT( p ) );
    }
  
  
   /************************************************************************/
   /************************************************************************/
   /*****                                                              *****/
   /*****                         GDEF TABLE                           *****/
   /*****                                                              *****/
   /************************************************************************/
   /************************************************************************/
  
    OTL_APIDEF( void )
    otl_gdef_validate( OTL_Bytes      table,
                       OTL_Validator  valid )
    {
      OTL_Bytes  p = table;
  
      if ( p + 12 > valid->limit )
        OTL_INVALID_TOO_SHORT;
  
      /* check format */
      if ( OTL_NEXT_ULONG( p ) != 0x00010000UL )
        OTL_INVALID_FORMAT;
  
      /* validate class definition table */
      otl_class_definition_validate( table + OTL_NEXT_USHORT( p ) );
  
      /* validate attachment point list */
      otl_attach_list_validate( table + OTL_NEXT_USHORT( p ) );
  
      /* validate ligature caret list */
      otl_ligature_caret_list_validate( table + OTL_NEXT_USHORT( p ) );
  
      /* validate mark attach class */
      otl_class_definition_validate( table + OTL_NEXT_USHORT( p ) );
    }
  
  

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