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Diffstat (limited to 'include/freetype/internal/ftcalc.h')
| -rw-r--r-- | include/freetype/internal/ftcalc.h | 178 |
1 files changed, 0 insertions, 178 deletions
diff --git a/include/freetype/internal/ftcalc.h b/include/freetype/internal/ftcalc.h deleted file mode 100644 index 58def34..0000000 --- a/include/freetype/internal/ftcalc.h +++ /dev/null @@ -1,178 +0,0 @@ -/***************************************************************************/ -/* */ -/* ftcalc.h */ -/* */ -/* Arithmetic computations (specification). */ -/* */ -/* Copyright 1996-2001, 2002, 2003, 2004, 2005, 2006, 2008 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_BASE( FT_Int32 ) - FT_SqrtFixed( FT_Int32 x ); - - -#ifdef FT_CONFIG_OPTION_OLD_INTERNALS - - /*************************************************************************/ - /* */ - /* <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 ); - -#endif /* FT_CONFIG_OPTION_OLD_INTERNALS */ - - - /*************************************************************************/ - /* */ - /* FT_MulDiv() and FT_MulFix() are declared in freetype.h. */ - /* */ - /*************************************************************************/ - - -#ifdef TT_USE_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_USE_BYTECODE_INTERPRETER */ - - - /* - * A variant of FT_Matrix_Multiply which scales its result afterwards. - * The idea is that both `a' and `b' are scaled by factors of 10 so that - * the values are as precise as possible to get a correct result during - * the 64bit multiplication. Let `sa' and `sb' be the scaling factors of - * `a' and `b', respectively, then the scaling factor of the result is - * `sa*sb'. - */ - FT_BASE( void ) - FT_Matrix_Multiply_Scaled( const FT_Matrix* a, - FT_Matrix *b, - FT_Long scaling ); - - - /* - * A variant of FT_Vector_Transform. See comments for - * FT_Matrix_Multiply_Scaled. - */ - - FT_BASE( void ) - FT_Vector_Transform_Scaled( FT_Vector* vector, - const FT_Matrix* matrix, - FT_Long scaling ); - - - /* - * Return -1, 0, or +1, depending on the orientation of a given corner. - * We use the Cartesian coordinate system, with positive vertical values - * going upwards. The function returns +1 if the corner turns to the - * left, -1 to the right, and 0 for undecidable cases. - */ - FT_BASE( FT_Int ) - ft_corner_orientation( FT_Pos in_x, - FT_Pos in_y, - FT_Pos out_x, - FT_Pos out_y ); - - /* - * Return TRUE if a corner is flat or nearly flat. This is equivalent to - * saying that the angle difference between the `in' and `out' vectors is - * very small. - */ - FT_BASE( FT_Int ) - ft_corner_is_flat( FT_Pos in_x, - FT_Pos in_y, - FT_Pos out_x, - FT_Pos out_y ); - - -#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 */ |