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| 4680 | right-hear | 1 | /******************************************************************* |
| 2 | * |
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| 3 | * ttcalc.h |
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| 4 | * |
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| 5 | * Arithmetic Computations (specification). |
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| 6 | * |
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| 7 | * Copyright 1996-1999 by |
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| 8 | * David Turner, Robert Wilhelm, and Werner Lemberg. |
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| 9 | * |
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| 10 | * This file is part of the FreeType project, and may only be used |
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| 11 | * modified and distributed under the terms of the FreeType project |
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| 12 | * license, LICENSE.TXT. By continuing to use, modify, or distribute |
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| 13 | * this file you indicate that you have read the license and |
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| 14 | * understand and accept it fully. |
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| 15 | * |
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| 16 | ******************************************************************/ |
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| 17 | |||
| 18 | #ifndef TTCALC_H |
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| 19 | #define TTCALC_H |
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| 20 | |||
| 21 | #include "ttconfig.h" |
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| 22 | #include "freetype.h" |
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| 23 | |||
| 24 | |||
| 25 | #ifdef __cplusplus |
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| 26 | extern "C" { |
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| 27 | #endif |
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| 28 | |||
| 29 | #ifdef LONG64 |
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| 30 | |||
| 31 | typedef INT64 TT_Int64; |
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| 32 | |||
| 33 | #define ADD_64( x, y, z ) z = x + y |
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| 34 | #define SUB_64( x, y, z ) z = x - y |
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| 35 | #define MUL_64( x, y, z ) z = (TT_Int64)(x) * (y) |
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| 36 | |||
| 37 | #define DIV_64( x, y ) ( (x) / (y) ) |
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| 38 | |||
| 39 | #define SQRT_64( x ) Sqrt64( x ) |
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| 40 | #define SQRT_32( x ) Sqrt32( x ) |
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| 41 | |||
| 42 | LOCAL_DEF TT_Int32 Sqrt64( TT_Int64 l ); |
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| 43 | |||
| 44 | #else /* LONG64 */ |
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| 45 | |||
| 46 | struct TT_Int64_ |
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| 47 | { |
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| 48 | TT_Word32 lo; |
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| 49 | TT_Word32 hi; |
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| 50 | }; |
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| 51 | |||
| 52 | typedef struct TT_Int64_ TT_Int64; |
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| 53 | |||
| 54 | #define ADD_64( x, y, z ) Add64( &x, &y, &z ) |
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| 55 | #define SUB_64( x, y, z ) Sub64( &x, &y, &z ) |
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| 56 | #define MUL_64( x, y, z ) MulTo64( x, y, &z ) |
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| 57 | |||
| 58 | #define DIV_64( x, y ) Div64by32( &x, y ) |
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| 59 | |||
| 60 | #define SQRT_64( x ) Sqrt64( &x ) |
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| 61 | #define SQRT_32( x ) Sqrt32( x ) |
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| 62 | |||
| 63 | LOCAL_DEF void Add64( TT_Int64* x, TT_Int64* y, TT_Int64* z ); |
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| 64 | LOCAL_DEF void Sub64( TT_Int64* x, TT_Int64* y, TT_Int64* z ); |
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| 65 | |||
| 66 | LOCAL_DEF void MulTo64( TT_Int32 x, TT_Int32 y, TT_Int64* z ); |
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| 67 | |||
| 68 | LOCAL_DEF TT_Int32 Div64by32( TT_Int64* x, TT_Int32 y ); |
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| 69 | |||
| 70 | LOCAL_DEF int Order64( TT_Int64* z ); |
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| 71 | |||
| 72 | LOCAL_DEF TT_Int32 Sqrt64( TT_Int64* l ); |
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| 73 | |||
| 74 | #endif /* LONG64 */ |
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| 75 | |||
| 76 | /* The two following functions are now part of the API! */ |
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| 77 | |||
| 78 | /* TT_Long TT_MulDiv( TT_Long a, TT_Long b, TT_Long c ); */ |
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| 79 | /* TT_Long TT_MulFix( TT_Long a, TT_Long b ); */ |
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| 80 | |||
| 81 | |||
| 82 | #define INT_TO_F26DOT6( x ) ( (Long)(x) << 6 ) |
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| 83 | #define INT_TO_F2DOT14( x ) ( (Long)(x) << 14 ) |
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| 84 | #define INT_TO_FIXED( x ) ( (Long)(x) << 16 ) |
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| 85 | #define F2DOT14_TO_FIXED( x ) ( (Long)(x) << 2 ) |
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| 86 | #define FLOAT_TO_FIXED( x ) ( (Long)(x * 65536.0) ) |
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| 87 | |||
| 88 | #define ROUND_F26DOT6( x ) ( x >= 0 ? ( ((x) + 32) & -64) \ |
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| 89 | : ( -((32 - (x)) & -64) ) ) |
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| 90 | |||
| 91 | #ifdef __cplusplus |
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| 92 | } |
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| 93 | #endif |
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| 94 | |||
| 95 | #endif /* TTCALC_H */ |
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| 96 | |||
| 97 | /* END */ |