1 /****************************************************************************
   2  *
   3  * ftgasp.c
   4  *
   5  *   Access of TrueType's `gasp' table (body).
   6  *
   7  * Copyright (C) 2007-2019 by
   8  * David Turner, Robert Wilhelm, and Werner Lemberg.
   9  *
  10  * This file is part of the FreeType project, and may only be used,
  11  * modified, and distributed under the terms of the FreeType project
  12  * license, LICENSE.TXT.  By continuing to use, modify, or distribute
  13  * this file you indicate that you have read the license and
  14  * understand and accept it fully.
  15  *
  16  */
  17 
  18 
  19 #include <ft2build.h>
  20 #include FT_GASP_H
  21 #include FT_INTERNAL_TRUETYPE_TYPES_H
  22 
  23 
  24   FT_EXPORT_DEF( FT_Int )
  25   FT_Get_Gasp( FT_Face  face,
  26                FT_UInt  ppem )
  27   {
  28     FT_Int  result = FT_GASP_NO_TABLE;
  29 
  30 
  31     if ( face && FT_IS_SFNT( face ) )
  32     {
  33       TT_Face  ttface = (TT_Face)face;
  34 
  35 
  36       if ( ttface->gasp.numRanges > 0 )
  37       {
  38         TT_GaspRange  range     = ttface->gasp.gaspRanges;
  39         TT_GaspRange  range_end = range + ttface->gasp.numRanges;
  40 
  41 
  42         while ( ppem > range->maxPPEM )
  43         {
  44           range++;
  45           if ( range >= range_end )
  46             goto Exit;
  47         }
  48 
  49         result = range->gaspFlag;
  50 
  51         /* ensure that we don't have spurious bits */
  52         if ( ttface->gasp.version == 0 )
  53           result &= 3;
  54       }
  55     }
  56   Exit:
  57     return result;
  58   }
  59 
  60 
  61 /* END */