diff options
| author | Jon A. Cruz <jon@joncruz.org> | 2007-02-19 20:48:09 +0000 |
|---|---|---|
| committer | joncruz <joncruz@users.sourceforge.net> | 2007-02-19 20:48:09 +0000 |
| commit | 6e272e78c148590660e3443caefce378800260c3 (patch) | |
| tree | 6440f0b74ad32266110af6ae030f2823b12b898e /src/util | |
| parent | Fixed unintialized variables and minor misc warnings (diff) | |
| download | inkscape-6e272e78c148590660e3443caefce378800260c3.tar.gz inkscape-6e272e78c148590660e3443caefce378800260c3.zip | |
Cleaned up DOS line ends that had snuck in.
(bzr r2399)
Diffstat (limited to 'src/util')
| -rw-r--r-- | src/util/fixed_point.h | 666 |
1 files changed, 333 insertions, 333 deletions
diff --git a/src/util/fixed_point.h b/src/util/fixed_point.h index bea891742..6afec5e3c 100644 --- a/src/util/fixed_point.h +++ b/src/util/fixed_point.h @@ -1,333 +1,333 @@ -/*
- * Inkscape::Util::FixedPoint - fixed point type
- *
- * Authors:
- * Jasper van de Gronde <th.v.d.gronde@hccnet.net>
- *
- * Copyright (C) 2006 Jasper van de Gronde
- *
- * Released under GNU GPL, read the file 'COPYING' for more information
- */
-
-#ifndef SEEN_INKSCAPE_UTIL_FIXED_POINT_H
-#define SEEN_INKSCAPE_UTIL_FIXED_POINT_H
-
-#include "traits/reference.h"
-#include <math.h>
-#include <algorithm>
-#include <limits>
-
-namespace Inkscape {
-
-namespace Util {
-
-template <typename T, unsigned int precision>
-class FixedPoint {
-public:
- FixedPoint() {}
- FixedPoint(const FixedPoint& value) : v(value.v) {}
- FixedPoint(char value) : v(static_cast<T>(value)<<precision) {}
- FixedPoint(unsigned char value) : v(static_cast<T>(value)<<precision) {}
- FixedPoint(short value) : v(static_cast<T>(value)<<precision) {}
- FixedPoint(unsigned short value) : v(static_cast<T>(value)<<precision) {}
- FixedPoint(int value) : v(static_cast<T>(value)<<precision) {}
- FixedPoint(unsigned int value) : v(static_cast<T>(value)<<precision) {}
- FixedPoint(double value) : v(static_cast<T>(floor(value*(1<<precision)))) {}
-
- FixedPoint& operator+=(FixedPoint val) { v += val.v; return *this; }
- FixedPoint& operator-=(FixedPoint val) { v -= val.v; return *this; }
- FixedPoint& operator*=(FixedPoint val) {
- const unsigned int half_size = 8*sizeof(T)/2;
- const T al = v&((1<<half_size)-1), bl = val.v&((1<<half_size)-1);
- const T ah = v>>half_size, bh = val.v>>half_size;
- v = static_cast<unsigned int>(al*bl)>>precision;
- if ( half_size >= precision ) {
- v += ((al*bh)+(ah*bl)+((ah*bh)<<half_size))<<(half_size-precision);
- } else {
- v += ((al*bh)+(ah*bl))>>(precision-half_size);
- v += (ah*bh)<<(2*half_size-precision);
- }
- return *this;
- }
-
- FixedPoint& operator*=(char val) { v *= val; return *this; }
- FixedPoint& operator*=(unsigned char val) { v *= val; return *this; }
- FixedPoint& operator*=(short val) { v *= val; return *this; }
- FixedPoint& operator*=(unsigned short val) { v *= val; return *this; }
- FixedPoint& operator*=(int val) { v *= val; return *this; }
- FixedPoint& operator*=(unsigned int val) { v *= val; return *this; }
-
- FixedPoint operator+(FixedPoint val) const { FixedPoint r(*this); return r+=val; }
- FixedPoint operator-(FixedPoint val) const { FixedPoint r(*this); return r-=val; }
- FixedPoint operator*(FixedPoint val) const { FixedPoint r(*this); return r*=val; }
-
- FixedPoint operator*(char val) const { FixedPoint r(*this); return r*=val; }
- FixedPoint operator*(unsigned char val) const { FixedPoint r(*this); return r*=val; }
- FixedPoint operator*(short val) const { FixedPoint r(*this); return r*=val; }
- FixedPoint operator*(unsigned short val) const { FixedPoint r(*this); return r*=val; }
- FixedPoint operator*(int val) const { FixedPoint r(*this); return r*=val; }
- FixedPoint operator*(unsigned int val) const { FixedPoint r(*this); return r*=val; }
-
- float operator*(float val) const { return static_cast<float>(*this)*val; }
- double operator*(double val) const { return static_cast<double>(*this)*val; }
-
- operator char() const { return v>>precision; }
- operator unsigned char() const { return v>>precision; }
- operator short() const { return v>>precision; }
- operator unsigned short() const { return v>>precision; }
- operator int() const { return v>>precision; }
- operator unsigned int() const { return v>>precision; }
-
- operator float() const { return ldexpf(v,-precision); }
- operator double() const { return ldexp(v,-precision); }
-private:
- T v;
-};
-
-template<typename T, unsigned int precision> FixedPoint<T,precision> operator *(char a, FixedPoint<T,precision> b) { return b*=a; }
-template<typename T, unsigned int precision> FixedPoint<T,precision> operator *(unsigned char a, FixedPoint<T,precision> b) { return b*=a; }
-template<typename T, unsigned int precision> FixedPoint<T,precision> operator *(short a, FixedPoint<T,precision> b) { return b*=a; }
-template<typename T, unsigned int precision> FixedPoint<T,precision> operator *(unsigned short a, FixedPoint<T,precision> b) { return b*=a; }
-template<typename T, unsigned int precision> FixedPoint<T,precision> operator *(int a, FixedPoint<T,precision> b) { return b*=a; }
-template<typename T, unsigned int precision> FixedPoint<T,precision> operator *(unsigned int a, FixedPoint<T,precision> b) { return b*=a; }
-
-template<typename T, unsigned int precision> float operator *(float a, FixedPoint<T,precision> b) { return b*a; }
-template<typename T, unsigned int precision> double operator *(double a, FixedPoint<T,precision> b) { return b*a; }
-
-}
-
-}
-
-#endif
-/*
- Local Variables:
- mode:c++
- c-file-style:"stroustrup"
- c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
- indent-tabs-mode:nil
- fill-column:99
- End:
-*/
-// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :
-/*
- * Inkscape::Util::FixedPoint - fixed point type
- *
- * Authors:
- * Jasper van de Gronde <th.v.d.gronde@hccnet.net>
- *
- * Copyright (C) 2006 Jasper van de Gronde
- *
- * Released under GNU GPL, read the file 'COPYING' for more information
- */
-
-#ifndef SEEN_INKSCAPE_UTIL_FIXED_POINT_H
-#define SEEN_INKSCAPE_UTIL_FIXED_POINT_H
-
-#include "traits/reference.h"
-#include <math.h>
-#include <algorithm>
-#include <limits>
-
-namespace Inkscape {
-
-namespace Util {
-
-template <typename T, unsigned int precision>
-class FixedPoint {
-public:
- FixedPoint() {}
- FixedPoint(const FixedPoint& value) : v(value.v) {}
- FixedPoint(char value) : v(static_cast<T>(value)<<precision) {}
- FixedPoint(unsigned char value) : v(static_cast<T>(value)<<precision) {}
- FixedPoint(short value) : v(static_cast<T>(value)<<precision) {}
- FixedPoint(unsigned short value) : v(static_cast<T>(value)<<precision) {}
- FixedPoint(int value) : v(static_cast<T>(value)<<precision) {}
- FixedPoint(unsigned int value) : v(static_cast<T>(value)<<precision) {}
- FixedPoint(double value) : v(static_cast<T>(floor(value*(1<<precision)))) {}
-
- FixedPoint& operator+=(FixedPoint val) { v += val.v; return *this; }
- FixedPoint& operator-=(FixedPoint val) { v -= val.v; return *this; }
- FixedPoint& operator*=(FixedPoint val) {
- const unsigned int half_size = 8*sizeof(T)/2;
- const T al = v&((1<<half_size)-1), bl = val.v&((1<<half_size)-1);
- const T ah = v>>half_size, bh = val.v>>half_size;
- v = static_cast<unsigned int>(al*bl)>>precision;
- if ( half_size >= precision ) {
- v += ((al*bh)+(ah*bl)+((ah*bh)<<half_size))<<(half_size-precision);
- } else {
- v += ((al*bh)+(ah*bl))>>(precision-half_size);
- v += (ah*bh)<<(2*half_size-precision);
- }
- return *this;
- }
-
- FixedPoint& operator*=(char val) { v *= val; return *this; }
- FixedPoint& operator*=(unsigned char val) { v *= val; return *this; }
- FixedPoint& operator*=(short val) { v *= val; return *this; }
- FixedPoint& operator*=(unsigned short val) { v *= val; return *this; }
- FixedPoint& operator*=(int val) { v *= val; return *this; }
- FixedPoint& operator*=(unsigned int val) { v *= val; return *this; }
-
- FixedPoint operator+(FixedPoint val) const { FixedPoint r(*this); return r+=val; }
- FixedPoint operator-(FixedPoint val) const { FixedPoint r(*this); return r-=val; }
- FixedPoint operator*(FixedPoint val) const { FixedPoint r(*this); return r*=val; }
-
- FixedPoint operator*(char val) const { FixedPoint r(*this); return r*=val; }
- FixedPoint operator*(unsigned char val) const { FixedPoint r(*this); return r*=val; }
- FixedPoint operator*(short val) const { FixedPoint r(*this); return r*=val; }
- FixedPoint operator*(unsigned short val) const { FixedPoint r(*this); return r*=val; }
- FixedPoint operator*(int val) const { FixedPoint r(*this); return r*=val; }
- FixedPoint operator*(unsigned int val) const { FixedPoint r(*this); return r*=val; }
-
- float operator*(float val) const { return static_cast<float>(*this)*val; }
- double operator*(double val) const { return static_cast<double>(*this)*val; }
-
- operator char() const { return v>>precision; }
- operator unsigned char() const { return v>>precision; }
- operator short() const { return v>>precision; }
- operator unsigned short() const { return v>>precision; }
- operator int() const { return v>>precision; }
- operator unsigned int() const { return v>>precision; }
-
- operator float() const { return ldexpf(v,-precision); }
- operator double() const { return ldexp(v,-precision); }
-private:
- T v;
-};
-
-template<typename T, unsigned int precision> FixedPoint<T,precision> operator *(char a, FixedPoint<T,precision> b) { return b*=a; }
-template<typename T, unsigned int precision> FixedPoint<T,precision> operator *(unsigned char a, FixedPoint<T,precision> b) { return b*=a; }
-template<typename T, unsigned int precision> FixedPoint<T,precision> operator *(short a, FixedPoint<T,precision> b) { return b*=a; }
-template<typename T, unsigned int precision> FixedPoint<T,precision> operator *(unsigned short a, FixedPoint<T,precision> b) { return b*=a; }
-template<typename T, unsigned int precision> FixedPoint<T,precision> operator *(int a, FixedPoint<T,precision> b) { return b*=a; }
-template<typename T, unsigned int precision> FixedPoint<T,precision> operator *(unsigned int a, FixedPoint<T,precision> b) { return b*=a; }
-
-template<typename T, unsigned int precision> float operator *(float a, FixedPoint<T,precision> b) { return b*a; }
-template<typename T, unsigned int precision> double operator *(double a, FixedPoint<T,precision> b) { return b*a; }
-
-}
-
-}
-
-#endif
-/*
- Local Variables:
- mode:c++
- c-file-style:"stroustrup"
- c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
- indent-tabs-mode:nil
- fill-column:99
- End:
-*/
-// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :
-/*
- * Inkscape::Util::FixedPoint - fixed point type
- *
- * Authors:
- * Jasper van de Gronde <th.v.d.gronde@hccnet.net>
- *
- * Copyright (C) 2006 Jasper van de Gronde
- *
- * Released under GNU GPL, read the file 'COPYING' for more information
- */
-
-#ifndef SEEN_INKSCAPE_UTIL_FIXED_POINT_H
-#define SEEN_INKSCAPE_UTIL_FIXED_POINT_H
-
-#include "traits/reference.h"
-#include <math.h>
-#include <algorithm>
-#include <limits>
-
-namespace Inkscape {
-
-namespace Util {
-
-template <typename T, unsigned int precision>
-class FixedPoint {
-public:
- FixedPoint() {}
- FixedPoint(const FixedPoint& value) : v(value.v) {}
- FixedPoint(char value) : v(static_cast<T>(value)<<precision) {}
- FixedPoint(unsigned char value) : v(static_cast<T>(value)<<precision) {}
- FixedPoint(short value) : v(static_cast<T>(value)<<precision) {}
- FixedPoint(unsigned short value) : v(static_cast<T>(value)<<precision) {}
- FixedPoint(int value) : v(static_cast<T>(value)<<precision) {}
- FixedPoint(unsigned int value) : v(static_cast<T>(value)<<precision) {}
- FixedPoint(double value) : v(static_cast<T>(floor(value*(1<<precision)))) {}
-
- FixedPoint& operator+=(FixedPoint val) { v += val.v; return *this; }
- FixedPoint& operator-=(FixedPoint val) { v -= val.v; return *this; }
- FixedPoint& operator*=(FixedPoint val) {
- const unsigned int half_size = 8*sizeof(T)/2;
- const T al = v&((1<<half_size)-1), bl = val.v&((1<<half_size)-1);
- const T ah = v>>half_size, bh = val.v>>half_size;
- v = static_cast<unsigned int>(al*bl)>>precision;
- if ( half_size >= precision ) {
- v += ((al*bh)+(ah*bl)+((ah*bh)<<half_size))<<(half_size-precision);
- } else {
- v += ((al*bh)+(ah*bl))>>(precision-half_size);
- v += (ah*bh)<<(2*half_size-precision);
- }
- return *this;
- }
-
- FixedPoint& operator*=(char val) { v *= val; return *this; }
- FixedPoint& operator*=(unsigned char val) { v *= val; return *this; }
- FixedPoint& operator*=(short val) { v *= val; return *this; }
- FixedPoint& operator*=(unsigned short val) { v *= val; return *this; }
- FixedPoint& operator*=(int val) { v *= val; return *this; }
- FixedPoint& operator*=(unsigned int val) { v *= val; return *this; }
-
- FixedPoint operator+(FixedPoint val) const { FixedPoint r(*this); return r+=val; }
- FixedPoint operator-(FixedPoint val) const { FixedPoint r(*this); return r-=val; }
- FixedPoint operator*(FixedPoint val) const { FixedPoint r(*this); return r*=val; }
-
- FixedPoint operator*(char val) const { FixedPoint r(*this); return r*=val; }
- FixedPoint operator*(unsigned char val) const { FixedPoint r(*this); return r*=val; }
- FixedPoint operator*(short val) const { FixedPoint r(*this); return r*=val; }
- FixedPoint operator*(unsigned short val) const { FixedPoint r(*this); return r*=val; }
- FixedPoint operator*(int val) const { FixedPoint r(*this); return r*=val; }
- FixedPoint operator*(unsigned int val) const { FixedPoint r(*this); return r*=val; }
-
- float operator*(float val) const { return static_cast<float>(*this)*val; }
- double operator*(double val) const { return static_cast<double>(*this)*val; }
-
- operator char() const { return v>>precision; }
- operator unsigned char() const { return v>>precision; }
- operator short() const { return v>>precision; }
- operator unsigned short() const { return v>>precision; }
- operator int() const { return v>>precision; }
- operator unsigned int() const { return v>>precision; }
-
- operator float() const { return ldexpf(v,-precision); }
- operator double() const { return ldexp(v,-precision); }
-private:
- T v;
-};
-
-template<typename T, unsigned int precision> FixedPoint<T,precision> operator *(char a, FixedPoint<T,precision> b) { return b*=a; }
-template<typename T, unsigned int precision> FixedPoint<T,precision> operator *(unsigned char a, FixedPoint<T,precision> b) { return b*=a; }
-template<typename T, unsigned int precision> FixedPoint<T,precision> operator *(short a, FixedPoint<T,precision> b) { return b*=a; }
-template<typename T, unsigned int precision> FixedPoint<T,precision> operator *(unsigned short a, FixedPoint<T,precision> b) { return b*=a; }
-template<typename T, unsigned int precision> FixedPoint<T,precision> operator *(int a, FixedPoint<T,precision> b) { return b*=a; }
-template<typename T, unsigned int precision> FixedPoint<T,precision> operator *(unsigned int a, FixedPoint<T,precision> b) { return b*=a; }
-
-template<typename T, unsigned int precision> float operator *(float a, FixedPoint<T,precision> b) { return b*a; }
-template<typename T, unsigned int precision> double operator *(double a, FixedPoint<T,precision> b) { return b*a; }
-
-}
-
-}
-
-#endif
-/*
- Local Variables:
- mode:c++
- c-file-style:"stroustrup"
- c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
- indent-tabs-mode:nil
- fill-column:99
- End:
-*/
-// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :
+/* + * Inkscape::Util::FixedPoint - fixed point type + * + * Authors: + * Jasper van de Gronde <th.v.d.gronde@hccnet.net> + * + * Copyright (C) 2006 Jasper van de Gronde + * + * Released under GNU GPL, read the file 'COPYING' for more information + */ + +#ifndef SEEN_INKSCAPE_UTIL_FIXED_POINT_H +#define SEEN_INKSCAPE_UTIL_FIXED_POINT_H + +#include "traits/reference.h" +#include <math.h> +#include <algorithm> +#include <limits> + +namespace Inkscape { + +namespace Util { + +template <typename T, unsigned int precision> +class FixedPoint { +public: + FixedPoint() {} + FixedPoint(const FixedPoint& value) : v(value.v) {} + FixedPoint(char value) : v(static_cast<T>(value)<<precision) {} + FixedPoint(unsigned char value) : v(static_cast<T>(value)<<precision) {} + FixedPoint(short value) : v(static_cast<T>(value)<<precision) {} + FixedPoint(unsigned short value) : v(static_cast<T>(value)<<precision) {} + FixedPoint(int value) : v(static_cast<T>(value)<<precision) {} + FixedPoint(unsigned int value) : v(static_cast<T>(value)<<precision) {} + FixedPoint(double value) : v(static_cast<T>(floor(value*(1<<precision)))) {} + + FixedPoint& operator+=(FixedPoint val) { v += val.v; return *this; } + FixedPoint& operator-=(FixedPoint val) { v -= val.v; return *this; } + FixedPoint& operator*=(FixedPoint val) { + const unsigned int half_size = 8*sizeof(T)/2; + const T al = v&((1<<half_size)-1), bl = val.v&((1<<half_size)-1); + const T ah = v>>half_size, bh = val.v>>half_size; + v = static_cast<unsigned int>(al*bl)>>precision; + if ( half_size >= precision ) { + v += ((al*bh)+(ah*bl)+((ah*bh)<<half_size))<<(half_size-precision); + } else { + v += ((al*bh)+(ah*bl))>>(precision-half_size); + v += (ah*bh)<<(2*half_size-precision); + } + return *this; + } + + FixedPoint& operator*=(char val) { v *= val; return *this; } + FixedPoint& operator*=(unsigned char val) { v *= val; return *this; } + FixedPoint& operator*=(short val) { v *= val; return *this; } + FixedPoint& operator*=(unsigned short val) { v *= val; return *this; } + FixedPoint& operator*=(int val) { v *= val; return *this; } + FixedPoint& operator*=(unsigned int val) { v *= val; return *this; } + + FixedPoint operator+(FixedPoint val) const { FixedPoint r(*this); return r+=val; } + FixedPoint operator-(FixedPoint val) const { FixedPoint r(*this); return r-=val; } + FixedPoint operator*(FixedPoint val) const { FixedPoint r(*this); return r*=val; } + + FixedPoint operator*(char val) const { FixedPoint r(*this); return r*=val; } + FixedPoint operator*(unsigned char val) const { FixedPoint r(*this); return r*=val; } + FixedPoint operator*(short val) const { FixedPoint r(*this); return r*=val; } + FixedPoint operator*(unsigned short val) const { FixedPoint r(*this); return r*=val; } + FixedPoint operator*(int val) const { FixedPoint r(*this); return r*=val; } + FixedPoint operator*(unsigned int val) const { FixedPoint r(*this); return r*=val; } + + float operator*(float val) const { return static_cast<float>(*this)*val; } + double operator*(double val) const { return static_cast<double>(*this)*val; } + + operator char() const { return v>>precision; } + operator unsigned char() const { return v>>precision; } + operator short() const { return v>>precision; } + operator unsigned short() const { return v>>precision; } + operator int() const { return v>>precision; } + operator unsigned int() const { return v>>precision; } + + operator float() const { return ldexpf(v,-precision); } + operator double() const { return ldexp(v,-precision); } +private: + T v; +}; + +template<typename T, unsigned int precision> FixedPoint<T,precision> operator *(char a, FixedPoint<T,precision> b) { return b*=a; } +template<typename T, unsigned int precision> FixedPoint<T,precision> operator *(unsigned char a, FixedPoint<T,precision> b) { return b*=a; } +template<typename T, unsigned int precision> FixedPoint<T,precision> operator *(short a, FixedPoint<T,precision> b) { return b*=a; } +template<typename T, unsigned int precision> FixedPoint<T,precision> operator *(unsigned short a, FixedPoint<T,precision> b) { return b*=a; } +template<typename T, unsigned int precision> FixedPoint<T,precision> operator *(int a, FixedPoint<T,precision> b) { return b*=a; } +template<typename T, unsigned int precision> FixedPoint<T,precision> operator *(unsigned int a, FixedPoint<T,precision> b) { return b*=a; } + +template<typename T, unsigned int precision> float operator *(float a, FixedPoint<T,precision> b) { return b*a; } +template<typename T, unsigned int precision> double operator *(double a, FixedPoint<T,precision> b) { return b*a; } + +} + +} + +#endif +/* + Local Variables: + mode:c++ + c-file-style:"stroustrup" + c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +)) + indent-tabs-mode:nil + fill-column:99 + End: +*/ +// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 : +/* + * Inkscape::Util::FixedPoint - fixed point type + * + * Authors: + * Jasper van de Gronde <th.v.d.gronde@hccnet.net> + * + * Copyright (C) 2006 Jasper van de Gronde + * + * Released under GNU GPL, read the file 'COPYING' for more information + */ + +#ifndef SEEN_INKSCAPE_UTIL_FIXED_POINT_H +#define SEEN_INKSCAPE_UTIL_FIXED_POINT_H + +#include "traits/reference.h" +#include <math.h> +#include <algorithm> +#include <limits> + +namespace Inkscape { + +namespace Util { + +template <typename T, unsigned int precision> +class FixedPoint { +public: + FixedPoint() {} + FixedPoint(const FixedPoint& value) : v(value.v) {} + FixedPoint(char value) : v(static_cast<T>(value)<<precision) {} + FixedPoint(unsigned char value) : v(static_cast<T>(value)<<precision) {} + FixedPoint(short value) : v(static_cast<T>(value)<<precision) {} + FixedPoint(unsigned short value) : v(static_cast<T>(value)<<precision) {} + FixedPoint(int value) : v(static_cast<T>(value)<<precision) {} + FixedPoint(unsigned int value) : v(static_cast<T>(value)<<precision) {} + FixedPoint(double value) : v(static_cast<T>(floor(value*(1<<precision)))) {} + + FixedPoint& operator+=(FixedPoint val) { v += val.v; return *this; } + FixedPoint& operator-=(FixedPoint val) { v -= val.v; return *this; } + FixedPoint& operator*=(FixedPoint val) { + const unsigned int half_size = 8*sizeof(T)/2; + const T al = v&((1<<half_size)-1), bl = val.v&((1<<half_size)-1); + const T ah = v>>half_size, bh = val.v>>half_size; + v = static_cast<unsigned int>(al*bl)>>precision; + if ( half_size >= precision ) { + v += ((al*bh)+(ah*bl)+((ah*bh)<<half_size))<<(half_size-precision); + } else { + v += ((al*bh)+(ah*bl))>>(precision-half_size); + v += (ah*bh)<<(2*half_size-precision); + } + return *this; + } + + FixedPoint& operator*=(char val) { v *= val; return *this; } + FixedPoint& operator*=(unsigned char val) { v *= val; return *this; } + FixedPoint& operator*=(short val) { v *= val; return *this; } + FixedPoint& operator*=(unsigned short val) { v *= val; return *this; } + FixedPoint& operator*=(int val) { v *= val; return *this; } + FixedPoint& operator*=(unsigned int val) { v *= val; return *this; } + + FixedPoint operator+(FixedPoint val) const { FixedPoint r(*this); return r+=val; } + FixedPoint operator-(FixedPoint val) const { FixedPoint r(*this); return r-=val; } + FixedPoint operator*(FixedPoint val) const { FixedPoint r(*this); return r*=val; } + + FixedPoint operator*(char val) const { FixedPoint r(*this); return r*=val; } + FixedPoint operator*(unsigned char val) const { FixedPoint r(*this); return r*=val; } + FixedPoint operator*(short val) const { FixedPoint r(*this); return r*=val; } + FixedPoint operator*(unsigned short val) const { FixedPoint r(*this); return r*=val; } + FixedPoint operator*(int val) const { FixedPoint r(*this); return r*=val; } + FixedPoint operator*(unsigned int val) const { FixedPoint r(*this); return r*=val; } + + float operator*(float val) const { return static_cast<float>(*this)*val; } + double operator*(double val) const { return static_cast<double>(*this)*val; } + + operator char() const { return v>>precision; } + operator unsigned char() const { return v>>precision; } + operator short() const { return v>>precision; } + operator unsigned short() const { return v>>precision; } + operator int() const { return v>>precision; } + operator unsigned int() const { return v>>precision; } + + operator float() const { return ldexpf(v,-precision); } + operator double() const { return ldexp(v,-precision); } +private: + T v; +}; + +template<typename T, unsigned int precision> FixedPoint<T,precision> operator *(char a, FixedPoint<T,precision> b) { return b*=a; } +template<typename T, unsigned int precision> FixedPoint<T,precision> operator *(unsigned char a, FixedPoint<T,precision> b) { return b*=a; } +template<typename T, unsigned int precision> FixedPoint<T,precision> operator *(short a, FixedPoint<T,precision> b) { return b*=a; } +template<typename T, unsigned int precision> FixedPoint<T,precision> operator *(unsigned short a, FixedPoint<T,precision> b) { return b*=a; } +template<typename T, unsigned int precision> FixedPoint<T,precision> operator *(int a, FixedPoint<T,precision> b) { return b*=a; } +template<typename T, unsigned int precision> FixedPoint<T,precision> operator *(unsigned int a, FixedPoint<T,precision> b) { return b*=a; } + +template<typename T, unsigned int precision> float operator *(float a, FixedPoint<T,precision> b) { return b*a; } +template<typename T, unsigned int precision> double operator *(double a, FixedPoint<T,precision> b) { return b*a; } + +} + +} + +#endif +/* + Local Variables: + mode:c++ + c-file-style:"stroustrup" + c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +)) + indent-tabs-mode:nil + fill-column:99 + End: +*/ +// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 : +/* + * Inkscape::Util::FixedPoint - fixed point type + * + * Authors: + * Jasper van de Gronde <th.v.d.gronde@hccnet.net> + * + * Copyright (C) 2006 Jasper van de Gronde + * + * Released under GNU GPL, read the file 'COPYING' for more information + */ + +#ifndef SEEN_INKSCAPE_UTIL_FIXED_POINT_H +#define SEEN_INKSCAPE_UTIL_FIXED_POINT_H + +#include "traits/reference.h" +#include <math.h> +#include <algorithm> +#include <limits> + +namespace Inkscape { + +namespace Util { + +template <typename T, unsigned int precision> +class FixedPoint { +public: + FixedPoint() {} + FixedPoint(const FixedPoint& value) : v(value.v) {} + FixedPoint(char value) : v(static_cast<T>(value)<<precision) {} + FixedPoint(unsigned char value) : v(static_cast<T>(value)<<precision) {} + FixedPoint(short value) : v(static_cast<T>(value)<<precision) {} + FixedPoint(unsigned short value) : v(static_cast<T>(value)<<precision) {} + FixedPoint(int value) : v(static_cast<T>(value)<<precision) {} + FixedPoint(unsigned int value) : v(static_cast<T>(value)<<precision) {} + FixedPoint(double value) : v(static_cast<T>(floor(value*(1<<precision)))) {} + + FixedPoint& operator+=(FixedPoint val) { v += val.v; return *this; } + FixedPoint& operator-=(FixedPoint val) { v -= val.v; return *this; } + FixedPoint& operator*=(FixedPoint val) { + const unsigned int half_size = 8*sizeof(T)/2; + const T al = v&((1<<half_size)-1), bl = val.v&((1<<half_size)-1); + const T ah = v>>half_size, bh = val.v>>half_size; + v = static_cast<unsigned int>(al*bl)>>precision; + if ( half_size >= precision ) { + v += ((al*bh)+(ah*bl)+((ah*bh)<<half_size))<<(half_size-precision); + } else { + v += ((al*bh)+(ah*bl))>>(precision-half_size); + v += (ah*bh)<<(2*half_size-precision); + } + return *this; + } + + FixedPoint& operator*=(char val) { v *= val; return *this; } + FixedPoint& operator*=(unsigned char val) { v *= val; return *this; } + FixedPoint& operator*=(short val) { v *= val; return *this; } + FixedPoint& operator*=(unsigned short val) { v *= val; return *this; } + FixedPoint& operator*=(int val) { v *= val; return *this; } + FixedPoint& operator*=(unsigned int val) { v *= val; return *this; } + + FixedPoint operator+(FixedPoint val) const { FixedPoint r(*this); return r+=val; } + FixedPoint operator-(FixedPoint val) const { FixedPoint r(*this); return r-=val; } + FixedPoint operator*(FixedPoint val) const { FixedPoint r(*this); return r*=val; } + + FixedPoint operator*(char val) const { FixedPoint r(*this); return r*=val; } + FixedPoint operator*(unsigned char val) const { FixedPoint r(*this); return r*=val; } + FixedPoint operator*(short val) const { FixedPoint r(*this); return r*=val; } + FixedPoint operator*(unsigned short val) const { FixedPoint r(*this); return r*=val; } + FixedPoint operator*(int val) const { FixedPoint r(*this); return r*=val; } + FixedPoint operator*(unsigned int val) const { FixedPoint r(*this); return r*=val; } + + float operator*(float val) const { return static_cast<float>(*this)*val; } + double operator*(double val) const { return static_cast<double>(*this)*val; } + + operator char() const { return v>>precision; } + operator unsigned char() const { return v>>precision; } + operator short() const { return v>>precision; } + operator unsigned short() const { return v>>precision; } + operator int() const { return v>>precision; } + operator unsigned int() const { return v>>precision; } + + operator float() const { return ldexpf(v,-precision); } + operator double() const { return ldexp(v,-precision); } +private: + T v; +}; + +template<typename T, unsigned int precision> FixedPoint<T,precision> operator *(char a, FixedPoint<T,precision> b) { return b*=a; } +template<typename T, unsigned int precision> FixedPoint<T,precision> operator *(unsigned char a, FixedPoint<T,precision> b) { return b*=a; } +template<typename T, unsigned int precision> FixedPoint<T,precision> operator *(short a, FixedPoint<T,precision> b) { return b*=a; } +template<typename T, unsigned int precision> FixedPoint<T,precision> operator *(unsigned short a, FixedPoint<T,precision> b) { return b*=a; } +template<typename T, unsigned int precision> FixedPoint<T,precision> operator *(int a, FixedPoint<T,precision> b) { return b*=a; } +template<typename T, unsigned int precision> FixedPoint<T,precision> operator *(unsigned int a, FixedPoint<T,precision> b) { return b*=a; } + +template<typename T, unsigned int precision> float operator *(float a, FixedPoint<T,precision> b) { return b*a; } +template<typename T, unsigned int precision> double operator *(double a, FixedPoint<T,precision> b) { return b*a; } + +} + +} + +#endif +/* + Local Variables: + mode:c++ + c-file-style:"stroustrup" + c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +)) + indent-tabs-mode:nil + fill-column:99 + End: +*/ +// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 : |
