Éanna Ó Catháin | 919c14e | 2020-09-14 17:36:49 +0100 | [diff] [blame] | 1 | // |
| 2 | // Copyright © 2020 Arm Ltd and Contributors. All rights reserved. |
| 3 | // SPDX-License-Identifier: MIT |
| 4 | // |
| 5 | |
| 6 | #include "BoundingBox.hpp" |
| 7 | #include <algorithm> |
| 8 | namespace od |
| 9 | { |
| 10 | |
| 11 | BoundingBox::BoundingBox() : |
| 12 | BoundingBox(0, 0, 0u, 0u) {} |
| 13 | |
| 14 | BoundingBox::BoundingBox( |
| 15 | int x, |
| 16 | int y, |
| 17 | unsigned int width, |
| 18 | unsigned int height) : |
| 19 | m_X(x), |
| 20 | m_Y(y), |
| 21 | m_Width(width), |
| 22 | m_Height(height) {} |
| 23 | |
| 24 | BoundingBox::BoundingBox(const BoundingBox& other) : |
| 25 | m_X(other.m_X), |
| 26 | m_Y(other.m_Y), |
| 27 | m_Width(other.m_Width), |
| 28 | m_Height(other.m_Height) {} |
| 29 | |
| 30 | int BoundingBox::GetX() const { |
| 31 | return m_X; |
| 32 | } |
| 33 | |
| 34 | int BoundingBox::GetY() const { |
| 35 | return m_Y; |
| 36 | } |
| 37 | |
| 38 | unsigned int BoundingBox::GetWidth() const { |
| 39 | return m_Width; |
| 40 | } |
| 41 | |
| 42 | unsigned int BoundingBox::GetHeight() const { |
| 43 | return m_Height; |
| 44 | } |
| 45 | |
| 46 | void BoundingBox::SetX(int x) { |
| 47 | m_X = x; |
| 48 | } |
| 49 | |
| 50 | void BoundingBox::SetY(int y) { |
| 51 | m_Y = y; |
| 52 | } |
| 53 | |
| 54 | void BoundingBox::SetWidth(unsigned int width) { |
| 55 | m_Width = width; |
| 56 | } |
| 57 | |
| 58 | void BoundingBox::SetHeight(unsigned int height) { |
| 59 | m_Height = height; |
| 60 | } |
| 61 | |
| 62 | BoundingBox& BoundingBox::operator=(const BoundingBox& other) { |
| 63 | m_X = other.m_X; |
| 64 | m_Y = other.m_Y; |
| 65 | |
| 66 | m_Width = other.m_Width; |
| 67 | m_Height = other.m_Height; |
| 68 | |
| 69 | return *this; |
| 70 | } |
| 71 | |
| 72 | /* Helper function to get a "valid" bounding box */ |
| 73 | void GetValidBoundingBox(const BoundingBox& boxIn, BoundingBox& boxOut, |
| 74 | const BoundingBox& boxLimits) { |
| 75 | boxOut.SetX(std::max(boxIn.GetX(), boxLimits.GetX())); |
| 76 | boxOut.SetY(std::max(boxIn.GetY(), boxLimits.GetY())); |
| 77 | |
| 78 | /* If we have changed x and/or y, we compensate by reducing the height and/or width */ |
| 79 | int boxOutWidth = static_cast<int>(boxIn.GetWidth()) - |
| 80 | std::max(0, (boxOut.GetX() - boxIn.GetX())); |
| 81 | int boxOutHeight = static_cast<int>(boxIn.GetHeight()) - |
| 82 | std::max(0, (boxOut.GetY() - boxIn.GetY())); |
| 83 | |
| 84 | /* This suggests that there was no overlap on x or/and y axis */ |
| 85 | if (boxOutHeight <= 0 || boxOutWidth <= 0) |
| 86 | { |
| 87 | boxOut = BoundingBox{0, 0, 0, 0}; |
| 88 | return; |
| 89 | } |
| 90 | |
| 91 | const int limitBoxRightX = boxLimits.GetX() + static_cast<int>(boxLimits.GetWidth()); |
| 92 | const int limitBoxRightY = boxLimits.GetY() + static_cast<int>(boxLimits.GetHeight()); |
| 93 | const int boxRightX = boxOut.GetX() + boxOutWidth; |
| 94 | const int boxRightY = boxOut.GetY() + boxOutHeight; |
| 95 | |
| 96 | if (boxRightX > limitBoxRightX) |
| 97 | { |
| 98 | boxOutWidth -= (boxRightX - limitBoxRightX); |
| 99 | } |
| 100 | |
| 101 | if (boxRightY > limitBoxRightY) |
| 102 | { |
| 103 | boxOutHeight -= (boxRightY - limitBoxRightY); |
| 104 | } |
| 105 | |
| 106 | /* This suggests value has rolled over because of very high numbers, not handled for now */ |
| 107 | if (boxOutHeight <= 0 || boxOutWidth <= 0) |
| 108 | { |
| 109 | boxOut = BoundingBox{0, 0, 0, 0}; |
| 110 | return; |
| 111 | } |
| 112 | |
| 113 | boxOut.SetHeight(static_cast<unsigned int>(boxOutHeight)); |
| 114 | boxOut.SetWidth(static_cast<unsigned int>(boxOutWidth)); |
| 115 | } |
| 116 | }// namespace od |