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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COBALT_MATH_RECT_F_H_
#define COBALT_MATH_RECT_F_H_
#include <iosfwd>
#include <string>
#include "cobalt/math/point_f.h"
#include "cobalt/math/rect_base.h"
#include "cobalt/math/size_f.h"
#include "cobalt/math/vector2d_f.h"
namespace cobalt {
namespace math {
class InsetsF;
// A floating-point version of Rect.
class RectF : public RectBase<RectF, PointF, SizeF, InsetsF, Vector2dF, float> {
public:
RectF()
: RectBase<RectF, PointF, SizeF, InsetsF, Vector2dF, float>(SizeF()) {}
RectF(float width, float height)
: RectBase<RectF, PointF, SizeF, InsetsF, Vector2dF, float>(
SizeF(width, height)) {}
RectF(float x, float y, float width, float height)
: RectBase<RectF, PointF, SizeF, InsetsF, Vector2dF, float>(
PointF(x, y), SizeF(width, height)) {}
explicit RectF(const SizeF& size)
: RectBase<RectF, PointF, SizeF, InsetsF, Vector2dF, float>(size) {}
RectF(const PointF& origin, const SizeF& size)
: RectBase<RectF, PointF, SizeF, InsetsF, Vector2dF, float>(origin,
size) {}
~RectF() {}
// Scales the rectangle by |scale|.
void Scale(float scale) { Scale(scale, scale); }
void Scale(float x_scale, float y_scale) {
set_origin(ScalePoint(origin(), x_scale, y_scale));
set_size(ScaleSize(size(), x_scale, y_scale));
}
// This method reports if the RectF can be safely converted to an integer
// Rect. When it is false, some dimension of the RectF is outside the bounds
// of what an integer can represent, and converting it to a Rect will require
// clamping.
bool IsExpressibleAsRect() const;
std::string ToString() const;
};
inline bool operator==(const RectF& lhs, const RectF& rhs) {
return lhs.origin() == rhs.origin() && lhs.size() == rhs.size();
}
inline bool operator!=(const RectF& lhs, const RectF& rhs) {
return !(lhs == rhs);
}
inline RectF operator+(const RectF& lhs, const Vector2dF& rhs) {
return RectF(lhs.x() + rhs.x(), lhs.y() + rhs.y(), lhs.width(), lhs.height());
}
inline RectF operator-(const RectF& lhs, const Vector2dF& rhs) {
return RectF(lhs.x() - rhs.x(), lhs.y() - rhs.y(), lhs.width(), lhs.height());
}
inline std::ostream& operator<<(std::ostream& os, const RectF& rect) {
os << rect.ToString();
return os;
}
inline RectF operator+(const Vector2dF& lhs, const RectF& rhs) {
return rhs + lhs;
}
RectF IntersectRects(const RectF& a, const RectF& b);
RectF UnionRects(const RectF& a, const RectF& b);
RectF SubtractRects(const RectF& a, const RectF& b);
inline RectF ScaleRect(const RectF& r, float x_scale, float y_scale) {
return RectF(r.x() * x_scale, r.y() * y_scale, r.width() * x_scale,
r.height() * y_scale);
}
inline RectF ScaleRect(const RectF& r, float scale) {
return ScaleRect(r, scale, scale);
}
// Constructs a rectangle with |p1| and |p2| as opposite corners.
//
// This could also be thought of as "the smallest rect that contains both
// points", except that we consider points on the right/bottom edges of the
// rect to be outside the rect. So technically one or both points will not be
// contained within the rect, because they will appear on one of these edges.
RectF BoundingRect(const PointF& p1, const PointF& p2);
extern template class RectBase<RectF, PointF, SizeF, InsetsF, Vector2dF, float>;
} // namespace math
} // namespace cobalt
#endif // COBALT_MATH_RECT_F_H_