libcamera v0.0.3
Supporting cameras in Linux since 2019
transform.h
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1/* SPDX-License-Identifier: LGPL-2.1-or-later */
2/*
3 * Copyright (C) 2020, Raspberry Pi Ltd
4 *
5 * transform.h - 2D plane transforms
6 */
7
8#pragma once
9
10#include <string>
11
12namespace libcamera {
13
14enum class Transform : int {
15 Identity = 0,
16 Rot0 = Identity,
17 HFlip = 1,
18 VFlip = 2,
19 HVFlip = HFlip | VFlip,
20 Rot180 = HVFlip,
21 Transpose = 4,
25};
26
28{
29 return static_cast<Transform>(static_cast<int>(t0) & static_cast<int>(t1));
30}
31
33{
34 return static_cast<Transform>(static_cast<int>(t0) | static_cast<int>(t1));
35}
36
38{
39 return static_cast<Transform>(static_cast<int>(t0) ^ static_cast<int>(t1));
40}
41
43{
44 return t0 = t0 & t1;
45}
46
48{
49 return t0 = t0 | t1;
50}
51
53{
54 return t0 = t0 ^ t1;
55}
56
58
60
61constexpr bool operator!(Transform t)
62{
63 return t == Transform::Identity;
64}
65
67{
68 return static_cast<Transform>(~static_cast<int>(t) & 7);
69}
70
71Transform transformFromRotation(int angle, bool *success = nullptr);
72
73const char *transformToString(Transform t);
74
75} /* namespace libcamera */
Top-level libcamera namespace.
Definition: backtrace.h:17
constexpr Transform operator&(Transform t0, Transform t1)
Apply bitwise AND operator between the bits in the two transforms.
Definition: transform.h:27
constexpr bool operator!(Transform t)
Return true if the transform is the Identity, otherwise false
Definition: transform.h:61
Transform
Enum to represent a 2D plane transform.
Definition: transform.h:14
constexpr Transform operator~(Transform t)
Return the transform with all the bits inverted individually.
Definition: transform.h:66
Transform transformFromRotation(int angle, bool *success=nullptr)
Return the transform representing a rotation of the given angle clockwise.
Definition: transform.cpp:276
Transform operator*(Transform t0, Transform t1)
Compose two transforms together.
Definition: transform.cpp:207
constexpr Transform & operator^=(Transform &t0, Transform t1)
Apply bitwise XOR-assignment operator between the bits in the two transforms.
Definition: transform.h:52
const char * transformToString(Transform t)
Return a character string describing the transform.
Definition: transform.cpp:306
constexpr Transform & operator|=(Transform &t0, Transform t1)
Apply bitwise OR-assignment operator between the bits in the two transforms.
Definition: transform.h:47
constexpr Transform operator|(Transform t0, Transform t1)
Apply bitwise OR operator between the bits in the two transforms.
Definition: transform.h:32
constexpr Transform operator^(Transform t0, Transform t1)
Apply bitwise XOR operator between the bits in the two transforms.
Definition: transform.h:37
constexpr Transform & operator&=(Transform &t0, Transform t1)
Apply bitwise AND-assignment operator between the bits in the two transforms.
Definition: transform.h:42
Transform operator-(Transform t)
Invert a transform.
Definition: transform.cpp:233