forked from minhngoc25a/freetype2
96 lines
4.6 KiB
C
96 lines
4.6 KiB
C
/***************************************************************************/
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/* */
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/* cf2fixed.h */
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/* */
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/* Adobe's code for Fixed Point Mathematics (specification only). */
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/* */
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/* Copyright 2007-2013 Adobe Systems Incorporated. */
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/* */
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/* This software, and all works of authorship, whether in source or */
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/* object code form as indicated by the copyright notice(s) included */
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/* herein (collectively, the "Work") is made available, and may only be */
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/* used, modified, and distributed under the FreeType Project License, */
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/* LICENSE.TXT. Additionally, subject to the terms and conditions of the */
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/* FreeType Project License, each contributor to the Work hereby grants */
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/* to any individual or legal entity exercising permissions granted by */
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/* the FreeType Project License and this section (hereafter, "You" or */
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/* "Your") a perpetual, worldwide, non-exclusive, no-charge, */
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/* royalty-free, irrevocable (except as stated in this section) patent */
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/* license to make, have made, use, offer to sell, sell, import, and */
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/* otherwise transfer the Work, where such license applies only to those */
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/* patent claims licensable by such contributor that are necessarily */
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/* infringed by their contribution(s) alone or by combination of their */
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/* contribution(s) with the Work to which such contribution(s) was */
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/* submitted. If You institute patent litigation against any entity */
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/* (including a cross-claim or counterclaim in a lawsuit) alleging that */
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/* the Work or a contribution incorporated within the Work constitutes */
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/* direct or contributory patent infringement, then any patent licenses */
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/* granted to You under this License for that Work shall terminate as of */
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/* the date such litigation is filed. */
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/* */
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/* By using, modifying, or distributing the Work you indicate that you */
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/* have read and understood the terms and conditions of the */
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/* FreeType Project License as well as those provided in this section, */
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/* and you accept them fully. */
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/* */
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/***************************************************************************/
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#ifndef CF2FIXED_H_
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#define CF2FIXED_H_
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FT_BEGIN_HEADER
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/* rasterizer integer and fixed point arithmetic must be 32-bit */
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#define CF2_Fixed CF2_F16Dot16
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typedef FT_Int32 CF2_Frac; /* 2.30 fixed point */
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#define CF2_FIXED_MAX ( (CF2_Fixed)0x7FFFFFFFL )
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#define CF2_FIXED_MIN ( (CF2_Fixed)0x80000000L )
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#define CF2_FIXED_ONE ( (CF2_Fixed)0x10000L )
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#define CF2_FIXED_EPSILON ( (CF2_Fixed)0x0001 )
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/* in C 89, left and right shift of negative numbers is */
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/* implementation specific behaviour in the general case */
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#define cf2_intToFixed( i ) \
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( (CF2_Fixed)( (FT_UInt32)(i) << 16 ) )
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#define cf2_fixedToInt( x ) \
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( (FT_Short)( ( (FT_UInt32)(x) + 0x8000U ) >> 16 ) )
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#define cf2_fixedRound( x ) \
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( (CF2_Fixed)( ( (FT_UInt32)(x) + 0x8000U ) & 0xFFFF0000UL ) )
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#define cf2_floatToFixed( f ) \
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( (CF2_Fixed)( (f) * 65536.0 + 0.5 ) )
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#define cf2_fixedAbs( x ) \
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( (x) < 0 ? -(x) : (x) )
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#define cf2_fixedFloor( x ) \
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( (CF2_Fixed)( (FT_UInt32)(x) & 0xFFFF0000UL ) )
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#define cf2_fixedFraction( x ) \
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( (x) - cf2_fixedFloor( x ) )
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#define cf2_fracToFixed( x ) \
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( (x) < 0 ? -( ( -(x) + 0x2000 ) >> 14 ) \
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: ( ( (x) + 0x2000 ) >> 14 ) )
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/* signed numeric types */
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typedef enum CF2_NumberType_
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{
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CF2_NumberFixed, /* 16.16 */
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CF2_NumberFrac, /* 2.30 */
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CF2_NumberInt /* 32.0 */
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} CF2_NumberType;
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FT_END_HEADER
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#endif /* CF2FIXED_H_ */
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/* END */
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