http://www.ousob.com --- Legacy Redefined OuSob - File: /wwwroot/clipx/usr/include/freetype2/freetype/internal/ftcalc.h

/***************************************************************************/ /* */ /* ftcalc.h */ /* */ /* Arithmetic computations (specification). */ /* */ /* Copyright 1996-2001, 2002, 2003, 2004 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 /*************************************************************************/ /* */ /* <Function> */ /* FT_FixedSqrt */ /* */ /* <Description> */ /* Computes the square root of a 16.16 fixed point value. */ /* */ /* <Input> */ /* x :: The value to compute the root for. */ /* */ /* <Return> */ /* The result of `sqrt(x)'. */ /* */ /* <Note> */ /* This function is not very fast. */ /* */ 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. */ /* */ /*************************************************************************/ #ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER /*************************************************************************/ /* */ /* <Function> */ /* FT_MulDiv_No_Round */ /* */ /* <Description> */ /* A very simple function used to perform the computation `(a*b)/c' */ /* (without rounding) with maximal accuracy (it uses a 64-bit */ /* intermediate integer whenever necessary). */ /* */ /* This function isn't necessarily as fast as some processor specific */ /* operations, but is at least completely portable. */ /* */ /* <Input> */ /* a :: The first multiplier. */ /* b :: The second multiplier. */ /* c :: The divisor. */ /* */ /* <Return> */ /* The result of `(a*b)/c'. This function never traps when trying to */ /* divide by zero; it simply returns `MaxInt' or `MinInt' depending */ /* on the signs of `a' and `b'. */ /* */ FT_BASE( FT_Long ) FT_MulDiv_No_Round( FT_Long a, FT_Long b, FT_Long c ); #endif /* TT_CONFIG_OPTION_BYTECODE_INTERPRETER */ #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 */