?? ftcalc.h
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/***************************************************************************//* *//* ftcalc.h *//* *//* Arithmetic computations (specification). *//* *//* Copyright 1996-2001, 2002 by *//* David Turner, Robert Wilhelm, and Werner Lemberg. *//* *//* This file is part of the FreeType project, and may only be used, *//* modified, and distributed under the terms of the FreeType project *//* license, LICENSE.TXT. By continuing to use, modify, or distribute *//* this file you indicate that you have read the license and *//* understand and accept it fully. *//* *//***************************************************************************/#ifndef __FTCALC_H__#define __FTCALC_H__#include <ft2build.h>#include FT_FREETYPE_HFT_BEGIN_HEADER FT_EXPORT( FT_Int32 ) FT_SqrtFixed( FT_Int32 x );#define SQRT_32( x ) FT_Sqrt32( x ) /*************************************************************************/ /* */ /* <Function> */ /* FT_Sqrt32 */ /* */ /* <Description> */ /* Computes the square root of an Int32 integer (which will be */ /* handled as an unsigned long value). */ /* */ /* <Input> */ /* x :: The value to compute the root for. */ /* */ /* <Return> */ /* The result of `sqrt(x)'. */ /* */ FT_EXPORT( FT_Int32 ) FT_Sqrt32( FT_Int32 x ); /*************************************************************************/ /* */ /* FT_MulDiv() and FT_MulFix() are declared in freetype.h. */ /* */ /*************************************************************************/#define INT_TO_F26DOT6( x ) ( (FT_Long)(x) << 6 )#define INT_TO_F2DOT14( x ) ( (FT_Long)(x) << 14 )#define INT_TO_FIXED( x ) ( (FT_Long)(x) << 16 )#define F2DOT14_TO_FIXED( x ) ( (FT_Long)(x) << 2 )#define FLOAT_TO_FIXED( x ) ( (FT_Long)( x * 65536.0 ) )#define ROUND_F26DOT6( x ) ( x >= 0 ? ( ( (x) + 32 ) & -64 ) \ : ( -( ( 32 - (x) ) & -64 ) ) )FT_END_HEADER#endif /* __FTCALC_H__ *//* END */
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