ref: 21658c31f705edd4c94798eee62ce5b5241814b9
dir: /src/cff/cf2fixed.h/
/***************************************************************************/ /* */ /* 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 ( (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 /* CF2FIXED_H_ */ /* END */