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/*
* 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 "FloatSize.h"
#include "IntPoint.h"
#include <wtf/MathExtras.h>
#if USE(CG) || USE(SKIA_ON_MAC_CHROME)
typedef struct CGPoint CGPoint;
#endif
#if PLATFORM(MAC) || (PLATFORM(CHROMIUM) && OS(DARWIN))
#ifdef NSGEOMETRY_TYPES_SAME_AS_CGGEOMETRY_TYPES
typedef struct CGPoint NSPoint;
#else
typedef struct _NSPoint NSPoint;
#endif
#endif
#if PLATFORM(QT)
#include "qglobal.h"
QT_BEGIN_NAMESPACE
class QPointF;
QT_END_NAMESPACE
#endif
#if PLATFORM(HAIKU)
class BPoint;
#endif
#if USE(SKIA)
struct SkPoint;
#endif
namespace WebCore {
class AffineTransform;
class TransformationMatrix;
class IntPoint;
class FloatPoint {
public:
FloatPoint() : m_x(0), m_y(0) { }
FloatPoint(float x, float y) : m_x(x), m_y(y) { }
FloatPoint(const IntPoint&);
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 scale(float sx, float sy)
{
m_x *= sx;
m_y *= sy;
}
void normalize();
float dot(const FloatPoint& a) const
{
return m_x * a.x() + m_y * a.y();
}
float length() const;
float lengthSquared() const
{
return m_x * m_x + m_y * m_y;
}
#if USE(CG) || USE(SKIA_ON_MAC_CHROME)
FloatPoint(const CGPoint&);
operator CGPoint() const;
#endif
#if (PLATFORM(MAC) && !defined(NSGEOMETRY_TYPES_SAME_AS_CGGEOMETRY_TYPES)) \
|| (PLATFORM(CHROMIUM) && OS(DARWIN))
FloatPoint(const NSPoint&);
operator NSPoint() const;
#endif
#if PLATFORM(QT)
FloatPoint(const QPointF&);
operator QPointF() const;
#endif
#if PLATFORM(HAIKU)
FloatPoint(const BPoint&);
operator BPoint() const;
#endif
#if USE(SKIA)
operator SkPoint() const;
FloatPoint(const SkPoint&);
#endif
FloatPoint matrixTransform(const TransformationMatrix&) const;
FloatPoint matrixTransform(const AffineTransform&) 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 FloatPoint& 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 FloatPoint operator-(const FloatPoint& a, const FloatSize& b)
{
return FloatPoint(a.x() - b.width(), a.y() - b.height());
}
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(static_cast<int>(roundf(p.x())), static_cast<int>(roundf(p.y())));
}
float findSlope(const FloatPoint& p1, const FloatPoint& p2, float& c);
// Find point where lines through the two pairs of points intersect. Returns false if the lines don't intersect.
bool findIntersection(const FloatPoint& p1, const FloatPoint& p2, const FloatPoint& d1, const FloatPoint& d2, FloatPoint& intersection);
}
#endif
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