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kc3-lang/freetype/src/psaux/psfixed.h
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Alexei Podtelezhnikov
- src/psaux/psfixed.h
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/**************************************************************************** * * 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 */