blob: 64f76663eec3687897e1434b7894b645acb63b86 [file] [log] [blame]
/*
* Copyright (C) 2003, 2006 Apple Computer, Inc. All rights reserved.
* Copyright (C) 2005 Nokia. All rights reserved.
* 2008 Eric Seidel <eric@webkit.org>
*
* 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 FloatSize_h
#define FloatSize_h
#include "platform/geometry/IntPoint.h"
#include "wtf/MathExtras.h"
#if OS(MACOSX)
typedef struct CGSize CGSize;
#ifdef __OBJC__
#import <Foundation/Foundation.h>
#endif
#endif
namespace blink {
class IntSize;
class LayoutSize;
class PLATFORM_EXPORT FloatSize {
public:
FloatSize() : m_width(0), m_height(0) { }
FloatSize(float width, float height) : m_width(width), m_height(height) { }
FloatSize(const IntSize& size) : m_width(size.width()), m_height(size.height()) { }
FloatSize(const LayoutSize&);
static FloatSize narrowPrecision(double width, double height);
float width() const { return m_width; }
float height() const { return m_height; }
void setWidth(float width) { m_width = width; }
void setHeight(float height) { m_height = height; }
bool isEmpty() const { return m_width <= 0 || m_height <= 0; }
bool isZero() const;
bool isExpressibleAsIntSize() const;
float aspectRatio() const { return m_width / m_height; }
void expand(float width, float height)
{
m_width += width;
m_height += height;
}
void scale(float s) { scale(s, s); }
void scale(float scaleX, float scaleY)
{
m_width *= scaleX;
m_height *= scaleY;
}
FloatSize expandedTo(const FloatSize& other) const
{
return FloatSize(m_width > other.m_width ? m_width : other.m_width,
m_height > other.m_height ? m_height : other.m_height);
}
FloatSize shrunkTo(const FloatSize& other) const
{
return FloatSize(m_width < other.m_width ? m_width : other.m_width,
m_height < other.m_height ? m_height : other.m_height);
}
float diagonalLength() const;
float diagonalLengthSquared() const
{
return m_width * m_width + m_height * m_height;
}
FloatSize transposedSize() const
{
return FloatSize(m_height, m_width);
}
FloatSize scaledBy(float scale) const
{
return scaledBy(scale, scale);
}
FloatSize scaledBy(float scaleX, float scaleY) const
{
return FloatSize(m_width * scaleX, m_height * scaleY);
}
#if OS(MACOSX)
explicit FloatSize(const CGSize&); // don't do this implicitly since it's lossy
operator CGSize() const;
#if defined(__OBJC__) && !defined(NSGEOMETRY_TYPES_SAME_AS_CGGEOMETRY_TYPES)
explicit FloatSize(const NSSize &); // don't do this implicitly since it's lossy
operator NSSize() const;
#endif
#endif
private:
float m_width, m_height;
};
inline FloatSize& operator+=(FloatSize& a, const FloatSize& b)
{
a.setWidth(a.width() + b.width());
a.setHeight(a.height() + b.height());
return a;
}
inline FloatSize& operator-=(FloatSize& a, const FloatSize& b)
{
a.setWidth(a.width() - b.width());
a.setHeight(a.height() - b.height());
return a;
}
inline FloatSize operator+(const FloatSize& a, const FloatSize& b)
{
return FloatSize(a.width() + b.width(), a.height() + b.height());
}
inline FloatSize operator-(const FloatSize& a, const FloatSize& b)
{
return FloatSize(a.width() - b.width(), a.height() - b.height());
}
inline FloatSize operator-(const FloatSize& size)
{
return FloatSize(-size.width(), -size.height());
}
inline FloatSize operator*(const FloatSize& a, const float b)
{
return FloatSize(a.width() * b, a.height() * b);
}
inline FloatSize operator*(const float a, const FloatSize& b)
{
return FloatSize(a * b.width(), a * b.height());
}
inline bool operator==(const FloatSize& a, const FloatSize& b)
{
return a.width() == b.width() && a.height() == b.height();
}
inline bool operator!=(const FloatSize& a, const FloatSize& b)
{
return a.width() != b.width() || a.height() != b.height();
}
inline IntSize roundedIntSize(const FloatSize& p)
{
return IntSize(clampTo<int>(roundf(p.width())), clampTo<int>(roundf(p.height())));
}
inline IntSize flooredIntSize(const FloatSize& p)
{
return IntSize(clampTo<int>(floorf(p.width())), clampTo<int>(floorf(p.height())));
}
inline IntSize expandedIntSize(const FloatSize& p)
{
return IntSize(clampTo<int>(ceilf(p.width())), clampTo<int>(ceilf(p.height())));
}
inline IntPoint flooredIntPoint(const FloatSize& p)
{
return IntPoint(clampTo<int>(floorf(p.width())), clampTo<int>(floorf(p.height())));
}
} // namespace blink
#endif // FloatSize_h