text: /*
   * Copyright (C) 2004, 2006, 2007 Apple Inc.  All rights reserved.
   * Copyright (C) 2005 Nokia.  All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
   * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
   * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
   * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
   * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
   * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  #ifndef FloatPoint_h
  #define FloatPoint_h
  
  #include "platform/geometry/FloatSize.h"
  #include "platform/geometry/IntPoint.h"
  #include "third_party/skia/include/core/SkPoint.h"
  #include "wtf/Allocator.h"
  #include "wtf/Forward.h"
  #include "wtf/MathExtras.h"
  #include <algorithm>
  #include <iosfwd>
  
  #if OS(MACOSX)
  typedef struct CGPoint CGPoint;
  
  #ifdef __OBJC__
  #import <Foundation/Foundation.h>
  #endif
  #endif
  
  namespace blink {
  
  class DoublePoint;
  class IntPoint;
  class IntSize;
  class LayoutPoint;
  class LayoutSize;
  
  class PLATFORM_EXPORT FloatPoint {
    DISALLOW_NEW_EXCEPT_PLACEMENT_NEW();
  
   public:
    FloatPoint() : m_x(0), m_y(0) {}
    FloatPoint(float x, float y) : m_x(x), m_y(y) {}
    FloatPoint(const IntPoint&);
    explicit FloatPoint(const SkPoint& point) : m_x(point.x()), m_y(point.y()) {}
    explicit FloatPoint(const DoublePoint&);
    explicit FloatPoint(const LayoutPoint&);
    explicit FloatPoint(const FloatSize& size)
        : m_x(size.width()), m_y(size.height()) {}
    explicit FloatPoint(const LayoutSize&);
    explicit FloatPoint(const IntSize& size)
        : m_x(size.width()), m_y(size.height()) {}
  
    static FloatPoint zero() { return FloatPoint(); }
  
    static FloatPoint narrowPrecision(double x, double y);
  
    float x() const { return m_x; }
    float y() const { return m_y; }
  
    void setX(float x) { m_x = x; }
    void setY(float y) { m_y = y; }
    void set(float x, float y) {
      m_x = x;
      m_y = y;
    }
    void move(float dx, float dy) {
      m_x += dx;
      m_y += dy;
    }
    void move(const IntSize& a) {
      m_x += a.width();
      m_y += a.height();
    }
    void move(const LayoutSize&);
    void move(const FloatSize& a) {
      m_x += a.width();
      m_y += a.height();
    }
    void moveBy(const IntPoint& a) {
      m_x += a.x();
      m_y += a.y();
    }
    void moveBy(const LayoutPoint&);
    void moveBy(const FloatPoint& a) {
      m_x += a.x();
      m_y += a.y();
    }
    void scale(float sx, float sy) {
      m_x *= sx;
      m_y *= sy;
    }
  
    float dot(const FloatPoint& a) const { return m_x * a.x() + m_y * a.y(); }
  
    float slopeAngleRadians() const;
    float length() const;
    float lengthSquared() const { return m_x * m_x + m_y * m_y; }
  
    FloatPoint expandedTo(const FloatPoint& other) const {
      return FloatPoint(std::max(m_x, other.m_x), std::max(m_y, other.m_y));
    }
  
    FloatPoint shrunkTo(const FloatPoint& other) const {
      return FloatPoint(std::min(m_x, other.m_x), std::min(m_y, other.m_y));
    }
  
    FloatPoint transposedPoint() const { return FloatPoint(m_y, m_x); }
  
    FloatPoint scaledBy(float scale) const {
      return FloatPoint(m_x * scale, m_y * scale);
    }
  
  #if OS(MACOSX)
    FloatPoint(const CGPoint&);
    operator CGPoint() const;
  #if defined(__OBJC__) && !defined(NSGEOMETRY_TYPES_SAME_AS_CGGEOMETRY_TYPES)
    FloatPoint(const NSPoint&);
    operator NSPoint() const;
  #endif
  #endif
  
    // Can we remove this one?
    SkPoint data() const;
  
    operator SkPoint() const { return SkPoint::Make(m_x, m_y); }
  
    String toString() const;
  
   private:
    float m_x, m_y;
  };
  
  inline FloatPoint& operator+=(FloatPoint& a, const FloatSize& b) {
    a.move(b.width(), b.height());
    return a;
  }
  
  inline FloatPoint& operator+=(FloatPoint& a, const FloatPoint& b) {
    a.move(b.x(), b.y());
    return a;
  }
  
  inline FloatPoint& operator-=(FloatPoint& a, const FloatSize& b) {
    a.move(-b.width(), -b.height());
    return a;
  }
  
  inline FloatPoint operator+(const FloatPoint& a, const FloatSize& b) {
    return FloatPoint(a.x() + b.width(), a.y() + b.height());
  }
  
  inline FloatPoint operator+(const FloatPoint& a, const IntSize& b) {
    return FloatPoint(a.x() + b.width(), a.y() + b.height());
  }
  
  inline FloatPoint operator+(const IntPoint& a, const FloatSize& b) {
    return FloatPoint(a.x() + b.width(), a.y() + b.height());
  }
  
  inline FloatPoint operator+(const FloatPoint& a, const FloatPoint& b) {
    return FloatPoint(a.x() + b.x(), a.y() + b.y());
  }
  
  inline FloatPoint operator+(const FloatPoint& a, const IntPoint& b) {
    return FloatPoint(a.x() + b.x(), a.y() + b.y());
  }
  
  inline FloatSize operator-(const FloatPoint& a, const FloatPoint& b) {
    return FloatSize(a.x() - b.x(), a.y() - b.y());
  }
  
  inline FloatSize operator-(const FloatPoint& a, const IntPoint& b) {
    return FloatSize(a.x() - b.x(), a.y() - b.y());
  }
  
  inline FloatPoint operator-(const FloatPoint& a, const FloatSize& b) {
    return FloatPoint(a.x() - b.width(), a.y() - b.height());
  }
  
  inline FloatPoint operator-(const FloatPoint& a) {
    return FloatPoint(-a.x(), -a.y());
  }
  
  inline bool operator==(const FloatPoint& a, const FloatPoint& b) {
    return a.x() == b.x() && a.y() == b.y();
  }
  
  inline bool operator!=(const FloatPoint& a, const FloatPoint& b) {
    return a.x() != b.x() || a.y() != b.y();
  }
  
  inline float operator*(const FloatPoint& a, const FloatPoint& b) {
    // dot product
    return a.dot(b);
  }
  
  inline IntPoint roundedIntPoint(const FloatPoint& p) {
    return IntPoint(clampTo<int>(roundf(p.x())), clampTo<int>(roundf(p.y())));
  }
  
  inline IntSize roundedIntSize(const FloatPoint& p) {
    return IntSize(clampTo<int>(roundf(p.x())), clampTo<int>(roundf(p.y())));
  }
  
  inline IntPoint flooredIntPoint(const FloatPoint& p) {
    return IntPoint(clampTo<int>(floorf(p.x())), clampTo<int>(floorf(p.y())));
  }
  
  inline IntPoint ceiledIntPoint(const FloatPoint& p) {
    return IntPoint(clampTo<int>(ceilf(p.x())), clampTo<int>(ceilf(p.y())));
  }
  
  inline IntSize flooredIntSize(const FloatPoint& p) {
    return IntSize(clampTo<int>(floorf(p.x())), clampTo<int>(floorf(p.y())));
  }
  
  inline FloatSize toFloatSize(const FloatPoint& a) {
    return FloatSize(a.x(), a.y());
  }
  
  // Find point where lines through the two pairs of points intersect.
  // Returns false if the lines don't intersect.
  PLATFORM_EXPORT bool findIntersection(const FloatPoint& p1,
                                        const FloatPoint& p2,
                                        const FloatPoint& d1,
                                        const FloatPoint& d2,
                                        FloatPoint& intersection);
  
  // Redeclared here to avoid ODR issues.
  // See platform/testing/GeometryPrinters.h.
  void PrintTo(const FloatPoint&, std::ostream*);
  
  }  // namespace blink
  
  #endif
  