/***************************************************************************//*                                                                         *//*  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_H  FT_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 */