1/* 2 * Copyright (C) 2011 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_FILTERFW_FILTERPACKS_BASE_GEOMETRY_H 18#define ANDROID_FILTERFW_FILTERPACKS_BASE_GEOMETRY_H 19 20#include <vector> 21 22namespace android { 23namespace filterfw { 24 25// This is an initial implementation of some geometrical structures. This is 26// likely to grow and become more sophisticated in the future. 27 28class Point { 29 public: 30 Point() : x_(0.0f), y_(0.0f) {} 31 Point(float x, float y) : x_(x), y_(y) {} 32 33 float x() const { return x_; } 34 float y() const { return y_; } 35 36 float Length() const; 37 bool ScaleTo(float new_length); 38 static float Distance(const Point& p0, const Point& p1); 39 40 // Add more of these as needed: 41 Point operator+(const Point& other) const; 42 Point operator-(const Point& other) const; 43 Point operator*(float factor) const; 44 45 void Rotate90Clockwise(); 46 47 private: 48 float x_, y_; 49}; 50 51class Quad { 52 public: 53 Quad() : points_(4) {} 54 virtual ~Quad() {} 55 56 Quad(const Point& p0, const Point& p1, const Point& p2, const Point& p3) 57 : points_(4) { 58 points_[0] = p0; 59 points_[1] = p1; 60 points_[2] = p2; 61 points_[3] = p3; 62 } 63 64 const std::vector<Point>& points() const { return points_; } 65 const Point& point(int ix) const; 66 67 protected: 68 std::vector<Point> points_; 69}; 70 71class SlantedRect : public Quad { 72 public: 73 SlantedRect() : width_(0.0f), height_(0.0f) {} 74 virtual ~SlantedRect() {} 75 76 bool FromCenterAxisAndLengths(const Point& center, 77 const Point& vert_axis, 78 const Point& lenghts); 79 80 float width() const { return width_; } 81 float height() const { return height_; } 82 83 private: 84 float width_; 85 float height_; 86}; 87 88struct Rect { 89 float x, y, width, height; 90 91 Rect() { 92 x = y = 0.0f; 93 width = height = 1.0f; 94 } 95 96 Rect(float x, float y, float width, float height) { 97 this->x = x; 98 this->y = y; 99 this->width = width; 100 this->height = height; 101 } 102 103 bool ExpandToAspectRatio(float ratio); 104 bool ExpandToMinLength(float length); 105 bool ScaleWithLengthLimit(float factor, float max_length); 106}; 107 108} // namespace filterfw 109} // namespace android 110 111#endif // ANDROID_FILTERFW_FILTERPACKS_BASE_GEOMETRY_H 112