ref: 8772845cdb3321b17cc383152337c1b047aca30b
dir: /src/autohint/ahangles.h/
/***************************************************************************/ /* */ /* ahangles.h */ /* */ /* A routine used to compute vector angles with limited accuracy */ /* and very high speed (specification). */ /* */ /* Copyright 2000-2001 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_END_HEADER #endif /* __AHANGLES_H__ */ /* END */