Marius Renn | 65953da | 2012-03-27 10:44:45 -0700 | [diff] [blame] | 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_CORE_GEOMETRY_H |
| 18 | #define ANDROID_FILTERFW_CORE_GEOMETRY_H |
| 19 | |
| 20 | #include <vector> |
| 21 | |
| 22 | namespace android { |
| 23 | namespace 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 | |
| 28 | class 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 | |
| 51 | class 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 | |
| 71 | struct Rect { |
| 72 | float x, y, width, height; |
| 73 | |
| 74 | Rect() { |
| 75 | x = y = 0.0f; |
| 76 | width = height = 1.0f; |
| 77 | } |
| 78 | |
| 79 | Rect(float x, float y, float width, float height) { |
| 80 | this->x = x; |
| 81 | this->y = y; |
| 82 | this->width = width; |
| 83 | this->height = height; |
| 84 | } |
| 85 | |
| 86 | bool ExpandToAspectRatio(float ratio); |
| 87 | bool ExpandToMinLength(float length); |
| 88 | bool ScaleWithLengthLimit(float factor, float max_length); |
| 89 | }; |
| 90 | |
| 91 | } // namespace filterfw |
| 92 | } // namespace android |
| 93 | |
| 94 | #endif // ANDROID_FILTERFW_CORE_GEOMETRY_H |