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

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• Hash : 04563546
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  Date : 2000-07-24T06:01:34
  

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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 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
  
  
  #ifdef FT_FLAT_COMPILE
  
  #include "ahtypes.h"
  
  #else
  
  #include <autohint/ahtypes.h>
  
  #endif
  
  
  #include <freetype/internal/ftobjs.h>
  
  
    /* 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];
  
  
    LOCAL_DEF
    AH_Angle  ah_angle( FT_Vector*  v );
  
  
  #endif /* AHANGLES_H */
  
  
  /* END */
  

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