96 lines
4.6 KiB
C
96 lines
4.6 KiB
C
/***************************************************************************/
|
|
/* */
|
|
/* cf2fixed.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 __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 */
|