src/freetype/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 */
Commit	Line	Data
	1	/***************************************************************************/
	2	/* */
	3	/* ahangles.h */
	4	/* */
	5	/* A routine used to compute vector angles with limited accuracy */
	6	/* and very high speed (specification). */
	7	/* */
	8	/* Copyright 2000 Catharon Productions Inc. */
	9	/* Author: David Turner */
	10	/* */
	11	/* This file is part of the Catharon Typography Project and shall only */
	12	/* be used, modified, and distributed under the terms of the Catharon */
	13	/* Open Source License that should come with this file under the name */
	14	/* `CatharonLicense.txt'. By continuing to use, modify, or distribute */
	15	/* this file you indicate that you have read the license and */
	16	/* understand and accept it fully. */
	17	/* */
	18	/* Note that this license is compatible with the FreeType license. */
	19	/* */
	20	/***************************************************************************/
	21
	22
	23	#ifndef AHANGLES_H
	24	#define AHANGLES_H
	25
	26
	27	#ifdef FT_FLAT_COMPILE
	28
	29	#include "ahtypes.h"
	30
	31	#else
	32
	33	#include <autohint/ahtypes.h>
	34
	35	#endif
	36
	37
	38	#include <freetype/internal/ftobjs.h>
	39
	40
	41	/* PI expressed in ah_angles -- we don't really need an important */
	42	/* precision, so 256 should be enough */
	43	#define AH_PI 256
	44	#define AH_2PI ( AH_PI * 2 )
	45	#define AH_HALF_PI ( AH_PI / 2 )
	46	#define AH_2PIMASK ( AH_2PI - 1 )
	47
	48	/* the number of bits used to express an arc tangent; */
	49	/* see the structure of the lookup table */
	50	#define AH_ATAN_BITS 8
	51
	52	extern
	53	const AH_Angle ah_arctan[1L << AH_ATAN_BITS];
	54
	55
	56	LOCAL_DEF
	57	AH_Angle ah_angle( FT_Vector* v );
	58
	59
	60	#endif /* AHANGLES_H */
	61
	62
	63	/* END */