kc3-lang/freetype/src/autohint/ahangles.h

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• Hash : 66456162
  Author :
  Date : 2002-08-21T21:34:59
  

          * src/pshinter/pshalgo3.c, src/autohint/ahangles.c,
          src/autohint/ahangles.h, src/autohint/ahglyph.c, src/autohint/ahhint.c,
          src/autohint/ahtypes.h: the automatic and Postscript hinter now
          automatically detect inflection points in glyph outlines and treats
          them specially. This is very useful to prevent nasty effect like the
          disappearing diagonals of "S" and "s" in many, many fonts..
  

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• src/autohint/ahangles.h

• /***************************************************************************/
  /*                                                                         */
  /*  ahangles.h                                                             */
  /*                                                                         */
  /*    A routine used to compute vector angles with limited accuracy        */
  /*    and very high speed (specification).                                 */
  /*                                                                         */
  /*  Copyright 2000-2001, 2002 Catharon Productions Inc.                    */
  /*  Author: David Turner                                                   */
  /*                                                                         */
  /*  This file is part of the Catharon Typography Project and shall only    */
  /*  be used, modified, and distributed under the terms of the Catharon     */
  /*  Open Source License that should come with this file under the name     */
  /*  `CatharonLicense.txt'.  By continuing to use, modify, or distribute    */
  /*  this file you indicate that you have read the license and              */
  /*  understand and accept it fully.                                        */
  /*                                                                         */
  /*  Note that this license is compatible with the FreeType license.        */
  /*                                                                         */
  /***************************************************************************/
  
  
  #ifndef __AHANGLES_H__
  #define __AHANGLES_H__
  
  
  #include <ft2build.h>
  #include FT_INTERNAL_OBJECTS_H
  #include "ahtypes.h"
  
  
  FT_BEGIN_HEADER
  
  
    /* PI expressed in ah_angles -- we don't really need an important */
    /* precision, so 256 should be enough                             */
  #define AH_PI       256
  #define AH_2PI      ( AH_PI * 2 )
  #define AH_HALF_PI  ( AH_PI / 2 )
  #define AH_2PIMASK  ( AH_2PI - 1 )
  
    /* the number of bits used to express an arc tangent; */
    /* see the structure of the lookup table              */
  #define AH_ATAN_BITS  8
  
    extern
    const AH_Angle  ah_arctan[1L << AH_ATAN_BITS];
  
  
    FT_LOCAL( AH_Angle )
    ah_angle( FT_Vector*  v );
  
  
    FT_LOCAL( AH_Angle )
    ah_angle_diff( AH_Angle  angle1,
                   AH_Angle  angle2 );
  
  
  FT_END_HEADER
  
  #endif /* __AHANGLES_H__ */
  
  
  /* END */
  

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