topical media & game development
lib-of-vs-libs-free-type-2.1.4-include-freetype2-freetype-internal-ftcalc.h / h
************************************************************************
/* */
/* 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 */
(C) Æliens
04/09/2009
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