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We implement 2D transforms as an enum class with 8 elements, consisting of the usual 2D plane transformations (flips, rotations etc.). The transform is made up of 3 bits, indicating whether the transform includes: a transpose, a horizontal flip (mirror) and a vertical flip. Signed-off-by: David Plowman <david.plowman@raspberrypi.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
78 lines
1.6 KiB
C++
78 lines
1.6 KiB
C++
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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/*
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* Copyright (C) 2020, Raspberry Pi (Trading) Limited
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*
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* transform.h - 2D plane transforms
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*/
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#ifndef __LIBCAMERA_TRANSFORM_H__
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#define __LIBCAMERA_TRANSFORM_H__
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#include <string>
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namespace libcamera {
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enum class Transform : int {
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Identity = 0,
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Rot0 = Identity,
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HFlip = 1,
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VFlip = 2,
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HVFlip = HFlip | VFlip,
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Rot180 = HVFlip,
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Transpose = 4,
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Rot270 = HFlip | Transpose,
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Rot90 = VFlip | Transpose,
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Rot180Transpose = HFlip | VFlip | Transpose
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};
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constexpr Transform operator&(Transform t0, Transform t1)
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{
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return static_cast<Transform>(static_cast<int>(t0) & static_cast<int>(t1));
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}
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constexpr Transform operator|(Transform t0, Transform t1)
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{
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return static_cast<Transform>(static_cast<int>(t0) | static_cast<int>(t1));
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}
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constexpr Transform operator^(Transform t0, Transform t1)
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{
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return static_cast<Transform>(static_cast<int>(t0) ^ static_cast<int>(t1));
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}
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constexpr Transform &operator&=(Transform &t0, Transform t1)
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{
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return t0 = t0 & t1;
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}
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constexpr Transform &operator|=(Transform &t0, Transform t1)
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{
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return t0 = t0 | t1;
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}
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constexpr Transform &operator^=(Transform &t0, Transform t1)
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{
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return t0 = t0 ^ t1;
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}
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Transform operator*(Transform t0, Transform t1);
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Transform operator-(Transform t);
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constexpr bool operator!(Transform t)
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{
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return t == Transform::Identity;
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}
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constexpr Transform operator~(Transform t)
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{
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return static_cast<Transform>(~static_cast<int>(t) & 7);
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}
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Transform transformFromRotation(int angle, bool *success = nullptr);
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const char *transformToString(Transform t);
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} /* namespace libcamera */
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#endif /* __LIBCAMERA_TRANSFORM_H__ */
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