ref: fd8000f0402d48fd22f774170c74d585a82d7508
dir: /src/psaux/psfixed.h/
/***************************************************************************/
/* */
/* psfixed.h */
/* */
/* Adobe's code for Fixed Point Mathematics (specification only). */
/* */
/* Copyright 2007-2013 Adobe Systems Incorporated. */
/* */
/* This software, and all works of authorship, whether in source or */
/* object code form as indicated by the copyright notice(s) included */
/* herein (collectively, the "Work") is made available, and may only be */
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/* to any individual or legal entity exercising permissions granted by */
/* the FreeType Project License and this section (hereafter, "You" or */
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/***************************************************************************/
#ifndef PSFIXED_H_
#define PSFIXED_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 ( (CF2_Fixed)0x10000L )
#define CF2_FIXED_EPSILON ( (CF2_Fixed)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_doubleToFixed( f ) \
( (CF2_Fixed)( (f) * 65536.0 + 0.5 ) )
#define cf2_fixedAbs( x ) \
( (x) < 0 ? NEG_INT32( 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 /* PSFIXED_H_ */
/* END */