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/*
* Copyright (C) 2004-2016 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 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 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.
*/
#pragma once
#include "FloatSize.h"
#include "IntPoint.h"
#include <wtf/Hasher.h>
#include <wtf/MathExtras.h>
#if USE(CG)
typedef struct CGPoint CGPoint;
#endif
#if PLATFORM(MAC)
#ifdef NSGEOMETRY_TYPES_SAME_AS_CGGEOMETRY_TYPES
typedef struct CGPoint NSPoint;
#else
typedef struct _NSPoint NSPoint;
#endif
#endif // PLATFORM(MAC)
namespace WTF {
class TextStream;
}
namespace WebCore {
class AffineTransform;
class TransformationMatrix;
class IntSize;
class FloatRect;
class FloatPoint {
WTF_MAKE_FAST_ALLOCATED;
public:
FloatPoint() { }
FloatPoint(float x, float y) : m_x(x), m_y(y) { }
WEBCORE_EXPORT FloatPoint(const IntPoint&);
explicit FloatPoint(const FloatSize& size) : m_x(size.width()), m_y(size.height()) { }
static FloatPoint zero() { return FloatPoint(); }
bool isZero() const { return !m_x && !m_y; }
WEBCORE_EXPORT 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 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 FloatPoint& a)
{
m_x += a.x();
m_y += a.y();
}
void scale(float scale)
{
m_x *= scale;
m_y *= scale;
}
void scale(float scaleX, float scaleY)
{
m_x *= scaleX;
m_y *= scaleY;
}
FloatPoint scaled(float scale) const
{
return { m_x * scale, m_y * scale };
}
FloatPoint scaled(float scaleX, float scaleY) const
{
return { m_x * scaleX, m_y * scaleY };
}
void rotate(double angleInRadians, const FloatPoint& aboutPoint = { })
{
auto sinAngle = sin(angleInRadians);
auto cosAngle = cos(angleInRadians);
m_x -= aboutPoint.x();
m_y -= aboutPoint.y();
auto newX = m_x * cosAngle - m_y * sinAngle + aboutPoint.x();
m_y = m_x * sinAngle + m_y * cosAngle + aboutPoint.y();
m_x = newX;
}
WEBCORE_EXPORT void normalize();
float dot(const FloatPoint& a) const
{
return m_x * a.x() + m_y * a.y();
}
float slopeAngleRadians() const;
float length() const
{
return std::hypot(m_x, m_y);
}
float lengthSquared() const
{
return m_x * m_x + m_y * m_y;
}
WEBCORE_EXPORT FloatPoint constrainedBetween(const FloatPoint& min, const FloatPoint& max) const;
WEBCORE_EXPORT FloatPoint constrainedWithin(const FloatRect&) const;
FloatPoint shrunkTo(const FloatPoint& other) const
{
return { std::min(m_x, other.m_x), std::min(m_y, other.m_y) };
}
FloatPoint expandedTo(const FloatPoint& other) const
{
return { std::max(m_x, other.m_x), std::max(m_y, other.m_y) };
}
FloatPoint transposedPoint() const
{
return { m_y, m_x };
}
#if USE(CG)
WEBCORE_EXPORT FloatPoint(const CGPoint&);
WEBCORE_EXPORT operator CGPoint() const;
#endif
#if PLATFORM(MAC) && !defined(NSGEOMETRY_TYPES_SAME_AS_CGGEOMETRY_TYPES)
WEBCORE_EXPORT FloatPoint(const NSPoint&);
WEBCORE_EXPORT operator NSPoint() const;
#endif
WEBCORE_EXPORT FloatPoint matrixTransform(const TransformationMatrix&) const;
WEBCORE_EXPORT FloatPoint matrixTransform(const AffineTransform&) const;
private:
float m_x { 0 };
float m_y { 0 };
};
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 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 IntSize flooredIntSize(const FloatPoint& p)
{
return IntSize(clampToInteger(floorf(p.x())), clampToInteger(floorf(p.y())));
}
inline IntPoint roundedIntPoint(const FloatPoint& p)
{
return IntPoint(clampToInteger(roundf(p.x())), clampToInteger(roundf(p.y())));
}
inline IntPoint flooredIntPoint(const FloatPoint& p)
{
return IntPoint(clampToInteger(floorf(p.x())), clampToInteger(floorf(p.y())));
}
inline IntPoint ceiledIntPoint(const FloatPoint& p)
{
return IntPoint(clampToInteger(ceilf(p.x())), clampToInteger(ceilf(p.y())));
}
inline FloatPoint floorPointToDevicePixels(const FloatPoint& p, float deviceScaleFactor)
{
return FloatPoint(floorf(p.x() * deviceScaleFactor) / deviceScaleFactor, floorf(p.y() * deviceScaleFactor) / deviceScaleFactor);
}
inline FloatPoint ceilPointToDevicePixels(const FloatPoint& p, float deviceScaleFactor)
{
return FloatPoint(ceilf(p.x() * deviceScaleFactor) / deviceScaleFactor, ceilf(p.y() * deviceScaleFactor) / deviceScaleFactor);
}
inline FloatSize toFloatSize(const FloatPoint& a)
{
return FloatSize(a.x(), a.y());
}
inline FloatPoint toFloatPoint(const FloatSize& a)
{
return FloatPoint(a.width(), a.height());
}
inline bool areEssentiallyEqual(const FloatPoint& a, const FloatPoint& b)
{
return WTF::areEssentiallyEqual(a.x(), b.x()) && WTF::areEssentiallyEqual(a.y(), b.y());
}
inline void add(Hasher& hasher, const FloatPoint& point)
{
add(hasher, point.x(), point.y());
}
WEBCORE_EXPORT WTF::TextStream& operator<<(WTF::TextStream&, const FloatPoint&);
}