/***************************************************************************/ | |
/* */ | |
/* cf2fixed.h */ | |
/* */ | |
/* Adobe's code for Fixed Point Mathematics (specification only). */ | |
/* */ | |
/* Copyright 2007-2013 Adobe Systems Incorporated. */ | |
/* */ | |
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/* */ | |
/***************************************************************************/ | |
#ifndef __CF2FIXED_H__ | |
#define __CF2FIXED_H__ | |
FT_BEGIN_HEADER | |
/* rasterizer integer and fixed point arithmetic must be 32-bit */ | |
#define CF2_Fixed CF2_F16Dot16 | |
typedef FT_Int32 CF2_Frac; /* 2.30 fixed point */ | |
#define CF2_FIXED_MAX ( (CF2_Fixed)0x7FFFFFFFL ) | |
#define CF2_FIXED_MIN ( (CF2_Fixed)0x80000000L ) | |
#define CF2_FIXED_ONE 0x10000L | |
#define CF2_FIXED_EPSILON 0x0001 | |
/* in C 89, left and right shift of negative numbers is */ | |
/* implementation specific behaviour in the general case */ | |
#define cf2_intToFixed( i ) \ | |
( (CF2_Fixed)( (FT_UInt32)(i) << 16 ) ) | |
#define cf2_fixedToInt( x ) \ | |
( (FT_Short)( ( (FT_UInt32)(x) + 0x8000U ) >> 16 ) ) | |
#define cf2_fixedRound( x ) \ | |
( (CF2_Fixed)( ( (FT_UInt32)(x) + 0x8000U ) & 0xFFFF0000UL ) ) | |
#define cf2_floatToFixed( f ) \ | |
( (CF2_Fixed)( (f) * 65536.0 + 0.5 ) ) | |
#define cf2_fixedAbs( x ) \ | |
( (x) < 0 ? -(x) : (x) ) | |
#define cf2_fixedFloor( x ) \ | |
( (CF2_Fixed)( (FT_UInt32)(x) & 0xFFFF0000UL ) ) | |
#define cf2_fixedFraction( x ) \ | |
( (x) - cf2_fixedFloor( x ) ) | |
#define cf2_fracToFixed( x ) \ | |
( (x) < 0 ? -( ( -(x) + 0x2000 ) >> 14 ) \ | |
: ( ( (x) + 0x2000 ) >> 14 ) ) | |
/* signed numeric types */ | |
typedef enum CF2_NumberType_ | |
{ | |
CF2_NumberFixed, /* 16.16 */ | |
CF2_NumberFrac, /* 2.30 */ | |
CF2_NumberInt /* 32.0 */ | |
} CF2_NumberType; | |
FT_END_HEADER | |
#endif /* __CF2FIXED_H__ */ | |
/* END */ |