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; 27 constexpr FloatRect(float _left, float _top, float _right, float _bottom) 28 : left(_left), top(_top), right(_right), bottom(_bottom) {} 29 30 float getWidth() const { return right - left; } 31 float getHeight() const { return bottom - top; } 32 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 53 constexpr bool isEmpty() const { return !(left < right && top < bottom); } 54 55 // a valid rectangle has a non negative width and height 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 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