1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4 
5 #include "ui/gfx/geometry/vector2d.h"
6 
7 #include <cmath>
8 
9 #include "base/numerics/clamped_math.h"
10 #include "base/strings/stringprintf.h"
11 
12 namespace gfx {
13 
IsZero() const14 bool Vector2d::IsZero() const {
15   return x_ == 0 && y_ == 0;
16 }
17 
Add(const Vector2d & other)18 void Vector2d::Add(const Vector2d& other) {
19   x_ = base::ClampAdd(other.x_, x_);
20   y_ = base::ClampAdd(other.y_, y_);
21 }
22 
Subtract(const Vector2d & other)23 void Vector2d::Subtract(const Vector2d& other) {
24   x_ = base::ClampSub(x_, other.x_);
25   y_ = base::ClampSub(y_, other.y_);
26 }
27 
LengthSquared() const28 int64_t Vector2d::LengthSquared() const {
29   return static_cast<int64_t>(x_) * x_ + static_cast<int64_t>(y_) * y_;
30 }
31 
Length() const32 float Vector2d::Length() const {
33   return static_cast<float>(std::sqrt(static_cast<double>(LengthSquared())));
34 }
35 
ToString() const36 std::string Vector2d::ToString() const {
37   return base::StringPrintf("[%d %d]", x_, y_);
38 }
39 
40 }  // namespace gfx
41