projects / wxWidgets.git / blame
| Commit | Line | Data |
|---|---|---|
| cabec872 RR |
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 */ |