forked from minhngoc25a/freetype2
95 lines
3.7 KiB
C
95 lines
3.7 KiB
C
/****************************************************************************
|
|
*
|
|
* 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) + 0x2000 - ( (x) < 0 ) ) >> 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 */
|