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      1 /****************************************************************************
      2  *
      3  * afwarp.h
      4  *
      5  *   Auto-fitter warping algorithm (specification).
      6  *
      7  * Copyright (C) 2006-2020 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 #ifndef AFWARP_H_
     20 #define AFWARP_H_
     21 
     22 #include "afhints.h"
     23 
     24 FT_BEGIN_HEADER
     25 
     26 #define AF_WARPER_SCALE
     27 
     28 #define AF_WARPER_FLOOR( x )  ( (x) & ~FT_TYPEOF( x )63 )
     29 #define AF_WARPER_CEIL( x )   AF_WARPER_FLOOR( (x) + 63 )
     30 
     31 
     32   typedef FT_Int32  AF_WarpScore;
     33 
     34   typedef struct  AF_WarperRec_
     35   {
     36     FT_Pos        x1, x2;
     37     FT_Pos        t1, t2;
     38     FT_Pos        x1min, x1max;
     39     FT_Pos        x2min, x2max;
     40     FT_Pos        w0, wmin, wmax;
     41 
     42     FT_Fixed      best_scale;
     43     FT_Pos        best_delta;
     44     AF_WarpScore  best_score;
     45     AF_WarpScore  best_distort;
     46 
     47   } AF_WarperRec, *AF_Warper;
     48 
     49 
     50 #ifdef AF_CONFIG_OPTION_USE_WARPER
     51   FT_LOCAL( void )
     52   af_warper_compute( AF_Warper      warper,
     53                      AF_GlyphHints  hints,
     54                      AF_Dimension   dim,
     55                      FT_Fixed      *a_scale,
     56                      FT_Pos        *a_delta );
     57 #endif
     58 
     59 
     60 FT_END_HEADER
     61 
     62 
     63 #endif /* AFWARP_H_ */
     64 
     65 
     66 /* END */
     67