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/***************************************************************************/
/* */
/* ftcalc.h */
/* */
/* Arithmetic computations (specification). */
/* */
/* Copyright 1996-2000 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 <freetype/freetype.h>
#include <freetype/config/ftconfig.h> /* for FT_LONG64 */
#ifdef __cplusplus
extern "C" {
#endif
#ifdef FT_LONG64
typedef FT_INT64 FT_Int64;
#define ADD_64( x, y, z ) z = (x) + (y)
#define MUL_64( x, y, z ) z = (FT_Int64)(x) * (y)
#define DIV_64( x, y ) ((x)/(y))
#ifdef FT_CONFIG_OPTION_OLD_CALCS
#define SQRT_64( z ) FT_Sqrt64( z )
FT_EXPORT_DEF( FT_Int32 ) FT_Sqrt64( FT_Int64 l );
#endif /* FT_CONFIG_OPTION_OLD_CALCS */
#else /* FT_LONG64 */
typedef struct FT_Int64_
{
FT_UInt32 lo;
FT_UInt32 hi;
} FT_Int64;
#define ADD_64( x, y, z ) FT_Add64( &x, &y, &z )
#define MUL_64( x, y, z ) FT_MulTo64( x, y, &z )
#define DIV_64( x, y ) FT_Div64by32( &x, y )
FT_EXPORT_DEF( void ) FT_Add64( FT_Int64* x,
FT_Int64* y,
FT_Int64* z );
FT_EXPORT_DEF( void ) FT_MulTo64( FT_Int32 x,
FT_Int32 y,
FT_Int64* z );
FT_EXPORT_DEF( FT_Int32 ) FT_Div64by32( FT_Int64* x,
FT_Int32 y );
#ifdef FT_CONFIG_OPTION_OLD_CALCS
FT_EXPORT_DEF(FT_Int32) FT_SqrtFixed( FT_Int32 x );
#define SQRT_64( z ) FT_Sqrt64( &z )
FT_EXPORT_DEF( FT_Int32 ) FT_Sqrt64( FT_Int64* x );
#endif /* FT_CONFIG_OPTION_OLD_CALCS */
#endif /* FT_LONG64 */
#ifndef FT_CONFIG_OPTION_OLD_CALCS
#define SQRT_32( x ) FT_Sqrt32( x )
BASE_DEF( FT_Int32 ) FT_Sqrt32( FT_Int32 x );
#endif /* !FT_CONFIG_OPTION_OLD_CALCS */
/*************************************************************************/
/* */
/* 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 ) ) )
#ifdef __cplusplus
}
#endif
#endif /* FTCALC_H */
/* END */
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