1 /*
2 * Copyright 2013 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #pragma once
18
19 #include <math/HashCombine.h>
20 #include <ostream>
21
22 namespace android {
23
24 class FloatRect {
25 public:
26 FloatRect() = default;
FloatRect(float _left,float _top,float _right,float _bottom)27 constexpr FloatRect(float _left, float _top, float _right, float _bottom)
28 : left(_left), top(_top), right(_right), bottom(_bottom) {}
29
getWidth()30 float getWidth() const { return right - left; }
getHeight()31 float getHeight() const { return bottom - top; }
32
intersect(const FloatRect & other)33 FloatRect intersect(const FloatRect& other) const {
34 FloatRect intersection = {
35 // Inline to avoid tromping on other min/max defines or adding a
36 // dependency on STL
37 (left > other.left) ? left : other.left,
38 (top > other.top) ? top : other.top,
39 (right < other.right) ? right : other.right,
40 (bottom < other.bottom) ? bottom : other.bottom
41 };
42 if (intersection.getWidth() < 0 || intersection.getHeight() < 0) {
43 return {0, 0, 0, 0};
44 }
45 return intersection;
46 }
47
48 float left = 0.0f;
49 float top = 0.0f;
50 float right = 0.0f;
51 float bottom = 0.0f;
52
isEmpty()53 constexpr bool isEmpty() const { return !(left < right && top < bottom); }
54
55 // a valid rectangle has a non negative width and height
isValid()56 inline bool isValid() const { return (getWidth() >= 0) && (getHeight() >= 0); }
57 };
58
59 inline bool operator==(const FloatRect& a, const FloatRect& b) {
60 return a.left == b.left && a.top == b.top && a.right == b.right && a.bottom == b.bottom;
61 }
62
PrintTo(const FloatRect & rect,::std::ostream * os)63 static inline void PrintTo(const FloatRect& rect, ::std::ostream* os) {
64 *os << "FloatRect(" << rect.left << ", " << rect.top << ", " << rect.right << ", "
65 << rect.bottom << ")";
66 }
67
68 } // namespace android
69
70 namespace std {
71
72 template <>
73 struct hash<android::FloatRect> {
74 size_t operator()(const android::FloatRect& rect) const {
75 return android::hashCombine(rect.left, rect.top, rect.right, rect.bottom);
76 }
77 };
78 } // namespace std
79