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Diffstat (limited to 'include/freetype/internal/ftcalc.h')
| -rw-r--r-- | include/freetype/internal/ftcalc.h | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/include/freetype/internal/ftcalc.h b/include/freetype/internal/ftcalc.h new file mode 100644 index 00000000..af1f6407 --- /dev/null +++ b/include/freetype/internal/ftcalc.h @@ -0,0 +1,77 @@ +/***************************************************************************/ +/* */ +/* 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 */ |