ref: c261b63aabaf32e885038023cada5360dea128be
dir: /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>
#ifdef __cplusplus
extern "C" {
#endif
/* 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 );
#ifdef __cplusplus
}
#endif
#endif /* AHANGLES_H */
/* END */