| // 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 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_ |