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      1 /***************************************************************************/
      2 /*                                                                         */
      3 /*  afwarp.h                                                               */
      4 /*                                                                         */
      5 /*    Auto-fitter warping algorithm (specification).                       */
      6 /*                                                                         */
      7 /*  Copyright 2006-2015 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) & ~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   FT_LOCAL( void )
     51   af_warper_compute( AF_Warper      warper,
     52                      AF_GlyphHints  hints,
     53                      AF_Dimension   dim,
     54                      FT_Fixed      *a_scale,
     55                      FT_Fixed      *a_delta );
     56 
     57 
     58 FT_END_HEADER
     59 
     60 
     61 #endif /* __AFWARP_H__ */
     62 
     63 
     64 /* END */
     65