ftgasp.c

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/****************************************************************************
 *
 * ftgasp.c
 *
 *   Access of TrueType's `gasp' table (body).
 *
 * Copyright (C) 2007-2020 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 <freetype/ftgasp.h>
#include <freetype/internal/tttypes.h>
 
 
  FT_EXPORT_DEF( FT_Int )
  FT_Get_Gasp( FT_Face  face,
               FT_UInt  ppem )
  {
    FT_Int  result = FT_GASP_NO_TABLE;
 
 
    if ( face && FT_IS_SFNT( face ) )
    {
      TT_Face  ttface = (TT_Face)face;
 
 
      if ( ttface->gasp.numRanges > 0 )
      {
        TT_GaspRange  range     = ttface->gasp.gaspRanges;
        TT_GaspRange  range_end = range + ttface->gasp.numRanges;
 
 
        while ( ppem > range->maxPPEM )
        {
          range++;
          if ( range >= range_end )
            goto Exit;
        }
 
        result = range->gaspFlag;
 
        /* ensure that we don't have spurious bits */
        if ( ttface->gasp.version == 0 )
          result &= 3;
      }
    }
  Exit:
    return result;
  }
 
 
/* END */