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1 /***************************************************************************/
2 /*                                                                         */
3 /*  afwarp.h                                                               */
4 /*                                                                         */
5 /*    Auto-fitter warping algorithm (specification).                       */
6 /*                                                                         */
7 /*  Copyright 2006, 2007 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) & ~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