ref: c49f69cb8c9d9b38179f760bf0cbbe4c78a3e296
dir: /src/autohint/ahangles.h/
/***************************************************************************/ /* */ /* ahangles.h */ /* */ /* a routine used to compute vector angles with limited accuracy */ /* and very high speed. */ /* */ /* 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 AGANGLES_H #define AGANGLES_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 to use to express an arc tangent */ /* see the structure of the lookup table.. */ #define AH_ATAN_BITS 8 LOCAL_DEF const AH_Angle ah_arctan[ 1L << AH_ATAN_BITS ]; LOCAL_DEF AH_Angle ah_angle( FT_Vector* v ); #endif /* AGANGLES_H */