libcamera/vivid.git - libcamera pipeline handler for VIVID

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/* SPDX-License-Identifier: LGPL-2.1-or-later */ /* * Copyright (C) 2023, Ideas On Board Oy * * Image orientation */ #include <libcamera/orientation.h> #include <array> /** * \file orientation.h * \brief Image orientation definition */ namespace libcamera { /** * \enum Orientation * \brief The image orientation in a memory buffer * * The Orientation enumeration describes the orientation of the images * produced by the camera pipeline as they get received by the application * inside memory buffers. * * The image orientation expressed using the Orientation enumeration can be then * inferred by applying to a naturally oriented image a multiple of a 90 degrees * rotation in the clockwise direction from the origin and then by applying an * optional horizontal mirroring. * * The enumeration numerical values follow the ones defined by the EXIF * Specification version 2.32, Tag 274 "Orientation", while the names of the * enumerated values report the rotation and mirroring operations performed. * * For example, Orientation::Rotate90Mirror describes the orientation obtained * by rotating the image 90 degrees clockwise first and then applying a * horizontal mirroring. * * \var CameraConfiguration::Rotate0 * \image html rotation/rotate0.svg * \var CameraConfiguration::Rotate0Mirror * \image html rotation/rotate0Mirror.svg * \var CameraConfiguration::Rotate180 * \image html rotation/rotate180.svg * \var CameraConfiguration::Rotate180Mirror * \image html rotation/rotate180Mirror.svg * \var CameraConfiguration::Rotate90Mirror * \image html rotation/rotate90Mirror.svg * \var CameraConfiguration::Rotate270 * \image html rotation/rotate270.svg * \var CameraConfiguration::Rotate270Mirror * \image html rotation/rotate270Mirror.svg * \var CameraConfiguration::Rotate90 * \image html rotation/rotate90.svg */ /** * \brief Return the orientation representing a rotation of the given angle * clockwise * \param[in] angle The angle of rotation in a clockwise sense. Negative values * can be used to represent anticlockwise rotations * \param[out] success Set to `true` if the angle is a multiple of 90 degrees, * otherwise `false` * \return The orientation corresponding to the rotation if \a success was set * to `true`, otherwise the `Rotate0` orientation */ Orientation orientationFromRotation(int angle, bool *success) { angle = angle % 360; if (angle < 0) angle += 360; if (success != nullptr) *success = true; switch (angle) { case 0: return Orientation::Rotate0; case 90: return Orientation::Rotate90; case 180: return Orientation::Rotate180; case 270: return Orientation::Rotate270; } if (success != nullptr) *success = false;


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