src/autofit/afwarp.h

/****************************************************************************
 *
 * afwarp.h
 *
 *   Auto-fitter warping algorithm (specification).
 *
 * Copyright (C) 2006-2021 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.
 *
 */


#ifndef AFWARP_H_
#define AFWARP_H_

#include "afhints.h"

FT_BEGIN_HEADER

#define AF_WARPER_SCALE

#define AF_WARPER_FLOOR( x )  ( (x) & ~FT_TYPEOF( x )63 )
#define AF_WARPER_CEIL( x )   AF_WARPER_FLOOR( (x) + 63 )


  typedef FT_Int32  AF_WarpScore;

  typedef struct  AF_WarperRec_
  {
    FT_Pos        x1, x2;
    FT_Pos        t1, t2;
    FT_Pos        x1min, x1max;
    FT_Pos        x2min, x2max;
    FT_Pos        w0, wmin, wmax;

    FT_Fixed      best_scale;
    FT_Pos        best_delta;
    AF_WarpScore  best_score;
    AF_WarpScore  best_distort;

  } AF_WarperRec, *AF_Warper;


#ifdef AF_CONFIG_OPTION_USE_WARPER
  FT_LOCAL( void )
  af_warper_compute( AF_Warper      warper,
                     AF_GlyphHints  hints,
                     AF_Dimension   dim,
                     FT_Fixed      *a_scale,
                     FT_Pos        *a_delta );
#endif


FT_END_HEADER


#endif /* AFWARP_H_ */


/* END */