1 /* 2 * Copyright (C) 2010 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 #ifndef ANDROID_HWUI_RECT_H 18 #define ANDROID_HWUI_RECT_H 19 20 #include <cmath> 21 22 #include <utils/Log.h> 23 24 namespace android { 25 namespace uirenderer { 26 27 /////////////////////////////////////////////////////////////////////////////// 28 // Structs 29 /////////////////////////////////////////////////////////////////////////////// 30 31 class Rect { 32 static inline float min(float a, float b) { return (a<b) ? a : b; } 33 static inline float max(float a, float b) { return (a>b) ? a : b; } 34 Rect intersectWith(float l, float t, float r, float b) const { 35 Rect tmp; 36 tmp.left = max(left, l); 37 tmp.top = max(top, t); 38 tmp.right = min(right, r); 39 tmp.bottom = min(bottom, b); 40 return tmp; 41 } 42 43 public: 44 float left; 45 float top; 46 float right; 47 float bottom; 48 49 // Used by Region 50 typedef float value_type; 51 52 // we don't provide copy-ctor and operator= on purpose 53 // because we want the compiler generated versions 54 55 inline Rect(): 56 left(0), 57 top(0), 58 right(0), 59 bottom(0) { 60 } 61 62 inline Rect(float left, float top, float right, float bottom): 63 left(left), 64 top(top), 65 right(right), 66 bottom(bottom) { 67 } 68 69 inline Rect(float width, float height): 70 left(0.0f), 71 top(0.0f), 72 right(width), 73 bottom(height) { 74 } 75 76 friend int operator==(const Rect& a, const Rect& b) { 77 return !memcmp(&a, &b, sizeof(a)); 78 } 79 80 friend int operator!=(const Rect& a, const Rect& b) { 81 return memcmp(&a, &b, sizeof(a)); 82 } 83 84 inline void clear() { 85 left = top = right = bottom = 0.0f; 86 } 87 88 inline bool isEmpty() const { 89 // this is written in such way this it'll handle NANs to return 90 // true (empty) 91 return !((left < right) && (top < bottom)); 92 } 93 94 inline void setEmpty() { 95 left = top = right = bottom = 0.0f; 96 } 97 98 inline void set(float left, float top, float right, float bottom) { 99 this->left = left; 100 this->right = right; 101 this->top = top; 102 this->bottom = bottom; 103 } 104 105 inline void set(const Rect& r) { 106 set(r.left, r.top, r.right, r.bottom); 107 } 108 109 inline float getWidth() const { 110 return right - left; 111 } 112 113 inline float getHeight() const { 114 return bottom - top; 115 } 116 117 bool intersects(float l, float t, float r, float b) const { 118 return !intersectWith(l,t,r,b).isEmpty(); 119 } 120 121 bool intersects(const Rect& r) const { 122 return intersects(r.left, r.top, r.right, r.bottom); 123 } 124 125 bool intersect(float l, float t, float r, float b) { 126 Rect tmp(intersectWith(l,t,r,b)); 127 if (!tmp.isEmpty()) { 128 set(tmp); 129 return true; 130 } 131 return false; 132 } 133 134 bool intersect(const Rect& r) { 135 return intersect(r.left, r.top, r.right, r.bottom); 136 } 137 138 bool unionWith(const Rect& r) { 139 if (r.left < r.right && r.top < r.bottom) { 140 if (left < right && top < bottom) { 141 if (left > r.left) left = r.left; 142 if (top > r.top) top = r.top; 143 if (right < r.right) right = r.right; 144 if (bottom < r.bottom) bottom = r.bottom; 145 return true; 146 } else { 147 left = r.left; 148 top = r.top; 149 right = r.right; 150 bottom = r.bottom; 151 return true; 152 } 153 } 154 return false; 155 } 156 157 void translate(float dx, float dy) { 158 left += dx; 159 right += dx; 160 top += dy; 161 bottom += dy; 162 } 163 164 void snapToPixelBoundaries() { 165 left = floorf(left + 0.5f); 166 top = floorf(top + 0.5f); 167 right = floorf(right + 0.5f); 168 bottom = floorf(bottom + 0.5f); 169 } 170 171 void dump() const { 172 LOGD("Rect[l=%f t=%f r=%f b=%f]", left, top, right, bottom); 173 } 174 175 }; // class Rect 176 177 }; // namespace uirenderer 178 }; // namespace android 179 180 #endif // ANDROID_HWUI_RECT_H 181
