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    41 

    42 #ifndef QFIXED_P_H

    43 #define QFIXED_P_H

    44 

    45 //

    46 //  W A R N I N G

    47 //  -------------

    48 //

    49 // This file is not part of the Qt API.  It exists for the convenience

    50 // of other Qt classes.  This header file may change from version to

    51 // version without notice, or even be removed.

    52 //

    53 // We mean it.

    54 //

    55 

    56 #include "QtCore/qdebug.h"

    57 #include "QtCore/qpoint.h"

    58 #include "QtCore/qsize.h"

    59 

    60 QT_BEGIN_NAMESPACE

    61 

    62 struct QFixed {

    63 public:

    64     QFixed() : val(0) {}

    65     QFixed(int i) : val(i<<6) {}

    66     QFixed(long i) : val(i<<6) {}

    67     QFixed &operator=(int i) { val = (i<<6); return *this; }

    68     QFixed &operator=(long i) { val = (i<<6); return *this; }

    69 

    70     static QFixed fromReal(qreal r) { QFixed f; f.val = (int)(r*qreal(64)); return f; }

    71     static QFixed fromFixed(int fixed) { QFixed f; f.val = fixed; return f; }

    72 

    73     inline int value() const { return val; }

    74     inline void setValue(int value) { val = value; }

    75 

    76     inline int toInt() const { return (((val)+32) & -64)>>6; }

    77     inline qreal toReal() const { return ((qreal)val)/(qreal)64; }

    78 

    79     inline int truncate() const { return val>>6; }

    80     inline QFixed round() const { QFixed f; f.val = ((val)+32) & -64; return f; }

    81     inline QFixed floor() const { QFixed f; f.val = (val) & -64; return f; }

    82     inline QFixed ceil() const { QFixed f; f.val = (val+63) & -64; return f; }

    83 

    84     inline QFixed operator+(int i) const { QFixed f; f.val = (val + (i<<6)); return f; }

    85     inline QFixed operator+(uint i) const { QFixed f; f.val = (val + (i<<6)); return f; }

    86     inline QFixed operator+(const QFixed &other) const { QFixed f; f.val = (val + other.val); return f; }

    87     inline QFixed &operator+=(int i) { val += (i<<6); return *this; }

    88     inline QFixed &operator+=(uint i) { val += (i<<6); return *this; }

    89     inline QFixed &operator+=(const QFixed &other) { val += other.val; return *this; }

    90     inline QFixed operator-(int i) const { QFixed f; f.val = (val - (i<<6)); return f; }

    91     inline QFixed operator-(uint i) const { QFixed f; f.val = (val - (i<<6)); return f; }

    92     inline QFixed operator-(const QFixed &other) const { QFixed f; f.val = (val - other.val); return f; }

    93     inline QFixed &operator-=(int i) { val -= (i<<6); return *this; }

    94     inline QFixed &operator-=(uint i) { val -= (i<<6); return *this; }

    95     inline QFixed &operator-=(const QFixed &other) { val -= other.val; return *this; }

    96     inline QFixed operator-() const { QFixed f; f.val = -val; return f; }

    97 

    98     inline bool operator==(const QFixed &other) const { return val == other.val; }

    99     inline bool operator!=(const QFixed &other) const { return val != other.val; }

   100     inline bool operator<(const QFixed &other) const { return val < other.val; }

   101     inline bool operator>(const QFixed &other) const { return val > other.val; }

   102     inline bool operator<=(const QFixed &other) const { return val <= other.val; }

   103     inline bool operator>=(const QFixed &other) const { return val >= other.val; }

   104     inline bool operator!() const { return !val; }

   105 

   106     inline QFixed &operator/=(int x) { val /= x; return *this; }

   107     inline QFixed &operator/=(const QFixed &o) {

   108         if (o.val == 0) {

   109             val = 0x7FFFFFFFL;

   110         } else {

   111             bool neg = false;

   112             qint64 a = val;

   113             qint64 b = o.val;

   114             if (a < 0) { a = -a; neg = true; }

   115             if (b < 0) { b = -b; neg = !neg; }

   116 

   117             int res = (int)(((a << 6) + (b >> 1)) / b);

   118 

   119             val = (neg ? -res : res);

   120         }

   121         return *this;

   122     }

   123     inline QFixed operator/(int d) const { QFixed f; f.val = val/d; return f; }

   124     inline QFixed operator/(QFixed b) const { QFixed f = *this; return (f /= b); }

   125     inline QFixed operator>>(int d) const { QFixed f = *this; f.val >>= d; return f; }

   126     inline QFixed &operator*=(int i) { val *= i; return *this; }

   127     inline QFixed &operator*=(uint i) { val *= i; return *this; }

   128     inline QFixed &operator*=(const QFixed &o) {

   129         bool neg = false;

   130         qint64 a = val;

   131         qint64 b = o.val;

   132         if (a < 0) { a = -a; neg = true; }

   133         if (b < 0) { b = -b; neg = !neg; }

   134 

   135         int res = (int)((a * b + 0x20L) >> 6);

   136         val = neg ? -res : res;

   137         return *this;

   138     }

   139     inline QFixed operator*(int i) const { QFixed f = *this; return (f *= i); }

   140     inline QFixed operator*(uint i) const { QFixed f = *this; return (f *= i); }

   141     inline QFixed operator*(const QFixed &o) const { QFixed f = *this; return (f *= o); }

   142 

   143 private:

   144     QFixed(qreal i) : val((int)(i*qreal(64))) {}

   145     QFixed &operator=(qreal i) { val = (int)(i*qreal(64)); return *this; }

   146     inline QFixed operator+(qreal i) const { QFixed f; f.val = (val + (int)(i*qreal(64))); return f; }

   147     inline QFixed &operator+=(qreal i) { val += (int)(i*64); return *this; }

   148     inline QFixed operator-(qreal i) const { QFixed f; f.val = (val - (int)(i*qreal(64))); return f; }

   149     inline QFixed &operator-=(qreal i) { val -= (int)(i*64); return *this; }

   150     inline QFixed &operator/=(qreal r) { val = (int)(val/r); return *this; }

   151     inline QFixed operator/(qreal d) const { QFixed f; f.val = (int)(val/d); return f; }

   152     inline QFixed &operator*=(qreal d) { val = (int) (val*d); return *this; }

   153     inline QFixed operator*(qreal d) const { QFixed f = *this; return (f *= d); }

   154     int val;

   155 };

   156 Q_DECLARE_TYPEINFO(QFixed, Q_PRIMITIVE_TYPE);

   157 

   158 #define QFIXED_MAX (INT_MAX/256)

   159 

   160 inline int qRound(const QFixed &f) { return f.toInt(); }

   161 inline int qFloor(const QFixed &f) { return f.floor().truncate(); }

   162 

   163 inline QFixed operator*(int i, const QFixed &d) { return d*i; }

   164 inline QFixed operator+(int i, const QFixed &d) { return d+i; }

   165 inline QFixed operator-(int i, const QFixed &d) { return -(d-i); }

   166 inline QFixed operator*(uint i, const QFixed &d) { return d*i; }

   167 inline QFixed operator+(uint i, const QFixed &d) { return d+i; }

   168 inline QFixed operator-(uint i, const QFixed &d) { return -(d-i); }

   169 // inline QFixed operator*(qreal d, const QFixed &d2) { return d2*d; }

   170 

   171 inline bool operator==(const QFixed &f, int i) { return f.value() == (i<<6); }

   172 inline bool operator==(int i, const QFixed &f) { return f.value() == (i<<6); }

   173 inline bool operator!=(const QFixed &f, int i) { return f.value() != (i<<6); }

   174 inline bool operator!=(int i, const QFixed &f) { return f.value() != (i<<6); }

   175 inline bool operator<=(const QFixed &f, int i) { return f.value() <= (i<<6); }

   176 inline bool operator<=(int i, const QFixed &f) { return (i<<6) <= f.value(); }

   177 inline bool operator>=(const QFixed &f, int i) { return f.value() >= (i<<6); }

   178 inline bool operator>=(int i, const QFixed &f) { return (i<<6) >= f.value(); }

   179 inline bool operator<(const QFixed &f, int i) { return f.value() < (i<<6); }

   180 inline bool operator<(int i, const QFixed &f) { return (i<<6) < f.value(); }

   181 inline bool operator>(const QFixed &f, int i) { return f.value() > (i<<6); }

   182 inline bool operator>(int i, const QFixed &f) { return (i<<6) > f.value(); }

   183 

   184 #ifndef QT_NO_DEBUG_STREAM

   185 inline QDebug &operator<<(QDebug &dbg, const QFixed &f)

   186 { return dbg << f.toReal(); }

   187 #endif

   188 

   189 struct QFixedPoint {

   190     QFixed x;

   191     QFixed y;

   192     inline QFixedPoint() {}

   193     inline QFixedPoint(const QFixed &_x, const QFixed &_y) : x(_x), y(_y) {}

   194     QPointF toPointF() const { return QPointF(x.toReal(), y.toReal()); }

   195     static QFixedPoint fromPointF(const QPointF &p) {

   196         return QFixedPoint(QFixed::fromReal(p.x()), QFixed::fromReal(p.y()));

   197     }

   198 };

   199 Q_DECLARE_TYPEINFO(QFixedPoint, Q_PRIMITIVE_TYPE);

   200 

   201 inline QFixedPoint operator-(const QFixedPoint &p1, const QFixedPoint &p2)

   202 { return QFixedPoint(p1.x - p2.x, p1.y - p2.y); }

   203 inline QFixedPoint operator+(const QFixedPoint &p1, const QFixedPoint &p2)

   204 { return QFixedPoint(p1.x + p2.x, p1.y + p2.y); }

   205 

   206 struct QFixedSize {

   207     QFixed width;

   208     QFixed height;

   209     QSizeF toSizeF() const { return QSizeF(width.toReal(), height.toReal()); }

   210     static QFixedSize fromSizeF(const QSizeF &s) {

   211         QFixedSize size;

   212         size.width = QFixed::fromReal(s.width());

   213         size.height = QFixed::fromReal(s.height());

   214         return size;

   215     }

   216 };

   217 Q_DECLARE_TYPEINFO(QFixedSize, Q_PRIMITIVE_TYPE);

   218 

   219 QT_END_NAMESPACE

   220 

   221 #endif // QTEXTENGINE_P_H