ref: 9789c75b1a6faf01cbcc34d85bf1bb3f473743b1
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
* used, modified, and distributed under the FreeType Project License,
* LICENSE.TXT. Additionally, subject to the terms and conditions of the
* FreeType Project License, each contributor to the Work hereby grants
* to any individual or legal entity exercising permissions granted by
* the FreeType Project License and this section (hereafter, "You" or
* "Your") a perpetual, worldwide, non-exclusive, no-charge,
* royalty-free, irrevocable (except as stated in this section) patent
* license to make, have made, use, offer to sell, sell, import, and
* otherwise transfer the Work, where such license applies only to those
* patent claims licensable by such contributor that are necessarily
* infringed by their contribution(s) alone or by combination of their
* contribution(s) with the Work to which such contribution(s) was
* submitted. If You institute patent litigation against any entity
* (including a cross-claim or counterclaim in a lawsuit) alleging that
* the Work or a contribution incorporated within the Work constitutes
* direct or contributory patent infringement, then any patent licenses
* granted to You under this License for that Work shall terminate as of
* the date such litigation is filed.
*
* By using, modifying, or distributing the Work you indicate that you
* have read and understood the terms and conditions of the
* FreeType Project License as well as those provided in this section,
* and you accept them fully.
*
*/
#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 */