334 lines
16 KiB
C#
334 lines
16 KiB
C#
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using System;
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using UnityEngine.XR.ARSubsystems;
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#if UNITY_ANDROID && !UNITY_EDITOR
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using System.Runtime.InteropServices;
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#endif
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namespace UnityEngine.XR.ARCore
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{
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/// <summary>
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/// Represents an
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/// [ARCore camera configuration](https://developers.google.com/ar/reference/c/group/ar-camera-config), which
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/// describes the ARCore-related properties of a device camera.
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/// </summary>
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public struct ArCameraConfig : IDisposable, IEquatable<ArCameraConfig>
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{
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IntPtr m_Self;
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ArCameraConfig(IntPtr value) => m_Self = value;
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/// <summary>
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/// Creates a <see cref="ArCameraConfig"/> from an existing native pointer. The native pointer must point
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/// to an existing <see cref="ArCameraConfig"/>.
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/// </summary>
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/// <param name="value">A pointer to an existing native <see cref="ArCameraConfig"/>.</param>
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/// <returns>Returns an <see cref="ArCameraConfig"/> whose underlying native pointer is
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/// <paramref name="value"/>.</returns>
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public static ArCameraConfig FromIntPtr(IntPtr value) => new ArCameraConfig(value);
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/// <summary>
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/// Represents a null <see cref="ArCameraConfig"/>, i.e., one whose underlying native pointer is `null`.
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/// This property is deprecated. Use <see langword="default"/> instead.
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/// </summary>
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[Obsolete("Use default instead.")]
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public static ArCameraConfig Null => default;
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/// <summary>
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/// (Read Only) Indicates whether this <see cref="ArCameraConfig"/> is `null`.
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/// This property is deprecated. Use the equality operator (`==`) to compare with `null` instead.
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/// </summary>
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[Obsolete("Compare to null instead.")]
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public bool IsNull => m_Self == IntPtr.Zero;
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/// <summary>
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/// Gets the underlying native pointer for this <see cref="ArCameraConfig"/>.
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/// </summary>
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/// <returns>Returns the underlying native pointer for this <see cref="ArCameraConfig"/>.</returns>
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public IntPtr AsIntPtr() => m_Self;
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/// <summary>
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/// Creates a new camera config object. To prevent memory leaks, this object should be disposed with
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/// <see cref="Dispose"/> when you no longer need it.
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/// </summary>
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/// <param name="session">The ARCore session.</param>
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public ArCameraConfig(ArSession session) => Create(session, out this);
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/// <summary>
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/// Destroys this <see cref="ArCameraConfig"/> and sets its underlying pointer to `null`.
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/// </summary>
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/// <remarks>
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/// You should only dispose an <see cref="ArCameraConfig"/> if you explicitly created it, e.g., by calling
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/// <see cref="ArCameraConfig(ArSession)"/>. If you convert an existing config from an <see cref="IntPtr"/>
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/// (e.g., by calling <see cref="FromIntPtr"/>), then you should not dispose it.
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/// </remarks>
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public void Dispose()
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{
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if (m_Self != IntPtr.Zero)
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{
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Destroy(this);
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}
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m_Self = default;
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}
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/// <summary>
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/// Obtains the camera id for this camera config.
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/// </summary>
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/// <param name="session">The ARCore session.</param>
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/// <returns>Returns the camera id for this camera config.</returns>
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public string GetCameraId(ArSession session)
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{
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GetCameraId(session, this, out var cameraId);
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using (cameraId)
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{
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return cameraId.ToString();
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}
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}
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/// <summary>
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/// Gets the depth sensor usage settings.
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/// </summary>
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/// <param name="session">The ARCore session.</param>
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/// <returns>Returns the depth sensor usage settings.</returns>
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public ArCameraConfigDepthSensorUsage GetDepthSensorUsage(ArSession session)
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{
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GetDepthSensorUsage(session, this, out var value);
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return value;
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}
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/// <summary>
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/// Gets the facing direction of the camera selected by this config.
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/// </summary>
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/// <param name="session">The ARCore session.</param>
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/// <returns>Returns the facing direction of the camera selected by this config.</returns>
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public ArCameraConfigFacingDirection GetFacingDirection(ArSession session)
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{
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GetFacingDirection(session, this, out var value);
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return value;
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}
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/// <summary>
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/// Gets the minimum and maximum camera capture rate in frames per second (fps) for the current camera config.
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/// </summary>
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/// <remarks>
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/// Actual capture frame rate will vary within this range, depending on lighting conditions. Frame rates will
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/// generally be lower under poor lighting conditions to accommodate longer exposure times.
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/// </remarks>
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/// <param name="session">The ARCore session.</param>
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/// <returns>Returns the minimum and maximum camera capture rate in frames per second supported by this camera
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/// config.</returns>
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public (int minFps, int maxFps) GetFpsRange(ArSession session)
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{
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GetFpsRange(session, this, out var min, out var max);
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return (min, max);
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}
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/// <summary>
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/// Gets the camera image dimensions for this camera config.
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/// </summary>
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/// <param name="session">The ARCore session.</param>
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/// <returns>Returns the camera image dimensions for this camera config.</returns>
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public (int width, int height) GetImageDimensions(ArSession session)
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{
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GetImageDimensions(session, this, out var width, out var height);
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return (width, height);
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}
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/// <summary>
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/// Gets the camera texture dimensions for this camera config.
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/// </summary>
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/// <param name="session">The ARCore session.</param>
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/// <returns>Returns the camera texture dimensions for this camera config.</returns>
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public (int width, int height) GetTextureDimensions(ArSession session)
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{
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GetTextureDimensions(session, this, out var width, out var height);
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return (width, height);
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}
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/// <summary>
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/// Casts an <see cref="ArCameraConfig"/> to its underlying native pointer.
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/// </summary>
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/// <param name="cameraConfig">The <see cref="ArCameraConfig"/> to cast.</param>
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/// <returns>Returns the underlying native pointer for <paramref name="cameraConfig"/></returns>
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public static explicit operator IntPtr(ArCameraConfig cameraConfig) => cameraConfig.AsIntPtr();
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/// <summary>
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/// Tests for equality.
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/// </summary>
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/// <remarks>
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/// Two <see cref="ArCameraConfig"/>s are considered equal if their underlying pointers are equal.
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/// </remarks>
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/// <param name="other">The <see cref="ArCameraConfig"/> to compare against.</param>
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/// <returns>Returns `true` if the underlying native pointers are the same. Returns `false` otherwise.</returns>
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public bool Equals(ArCameraConfig other) => m_Self == other.m_Self;
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/// <summary>
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/// Tests for equality.
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/// </summary>
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/// <param name="obj">An <see cref="object"/> to compare against.</param>
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/// <returns>Returns `true` if <paramref name="obj"/> is an <see cref="ArCameraConfig"/> and it compares
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/// equal to this one using <see cref="Equals(UnityEngine.XR.ARCore.ArCameraConfig)"/>.</returns>
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public override bool Equals(object obj) => obj is ArCameraConfig other && Equals(other);
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/// <summary>
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/// Generates a hash code suitable for use with a `HashSet` or `Dictionary`
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/// </summary>
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/// <returns>Returns a hash code for this <see cref="ArCameraConfig"/>.</returns>
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public override int GetHashCode() => m_Self.GetHashCode();
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/// <summary>
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/// Tests for equality. Same as <see cref="Equals(UnityEngine.XR.ARCore.ArCameraConfig)"/>.
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/// </summary>
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/// <param name="lhs">The <see cref="ArCameraConfig"/> to compare with <paramref name="rhs"/>.</param>
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/// <param name="rhs">The <see cref="ArCameraConfig"/> to compare with <paramref name="lhs"/>.</param>
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/// <returns>Returns `true` if <paramref name="lhs"/> is equal to <paramref name="rhs"/> using
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/// <see cref="Equals(UnityEngine.XR.ARCore.ArCameraConfig)"/>. Returns `false` otherwise.</returns>
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public static bool operator ==(ArCameraConfig lhs, ArCameraConfig rhs) => lhs.Equals(rhs);
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/// <summary>
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/// Tests for inequality. Same as the negation of <see cref="Equals(UnityEngine.XR.ARCore.ArCameraConfig)"/>.
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/// </summary>
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/// <param name="lhs">The <see cref="ArCameraConfig"/> to compare with <paramref name="rhs"/>.</param>
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/// <param name="rhs">The <see cref="ArCameraConfig"/> to compare with <paramref name="lhs"/>.</param>
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/// <returns>Returns `false` if <paramref name="lhs"/> is equal to <paramref name="rhs"/> using
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/// <see cref="Equals(UnityEngine.XR.ARCore.ArCameraConfig)"/>. Returns `true` otherwise.</returns>
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public static bool operator !=(ArCameraConfig lhs, ArCameraConfig rhs) => !lhs.Equals(rhs);
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/// <summary>
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/// Tests for equality.
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/// </summary>
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/// <remarks>
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/// This equality operator lets you to compare an <see cref="ArCameraConfig"/> with `null` to determine whether its
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/// underlying pointer is null. This allows for a more natural comparison with the native ARCore object:
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/// <example>
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/// <code>
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/// bool TestForNull(ArCameraConfig obj)
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/// {
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/// if (obj == null)
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/// {
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/// // obj.AsIntPtr() is IntPtr.Zero
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/// }
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/// }
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/// </code>
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/// </example>
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/// </remarks>
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/// <param name="lhs">The nullable <see cref="ArCameraConfig"/> to compare with <paramref name="rhs"/>.</param>
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/// <param name="rhs">The nullable <see cref="ArCameraConfig"/> to compare with <paramref name="lhs"/>.</param>
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/// <returns>Returns true if any of these conditions are met:
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/// - <paramref name="lhs"/> and <paramref name="rhs"/> are both not null and their underlying pointers are equal.
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/// - <paramref name="lhs"/> is null and <paramref name="rhs"/>'s underlying pointer is null.
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/// - <paramref name="rhs"/> is null and <paramref name="lhs"/>'s underlying pointer is null.
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/// - Both <paramref name="lhs"/> and <paramref name="rhs"/> are null.
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///
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/// Returns false otherwise.
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/// </returns>
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public static bool operator ==(ArCameraConfig? lhs, ArCameraConfig? rhs) => NativeObject.ArePointersEqual(lhs?.m_Self, rhs?.m_Self);
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/// <summary>
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/// Tests for inequality.
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/// </summary>
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/// <remarks>
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/// This inequality operator lets you to compare an <see cref="ArCameraConfig"/> with `null` to determine whether its
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/// underlying pointer is null. This allows for a more natural comparison with the native ARCore object:
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/// <example>
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/// <code>
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/// bool TestForNull(ArCameraConfig obj)
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/// {
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/// if (obj != null)
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/// {
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/// // obj.AsIntPtr() is not IntPtr.Zero
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/// }
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/// }
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/// </code>
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/// </example>
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/// </remarks>
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/// <param name="lhs">The native object to compare with <paramref name="rhs"/>.</param>
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/// <param name="rhs">The native object to compare with <paramref name="lhs"/>.</param>
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/// <returns>Returns false if any of these conditions are met:
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/// - <paramref name="lhs"/> and <paramref name="rhs"/> are both not null and their underlying pointers are equal.
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/// - <paramref name="lhs"/> is null and <paramref name="rhs"/>'s underlying pointer is null.
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/// - <paramref name="rhs"/> is null and <paramref name="lhs"/>'s underlying pointer is null.
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/// - Both <paramref name="lhs"/> and <paramref name="rhs"/> are null.
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///
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/// Returns true otherwise.
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/// </returns>
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public static bool operator !=(ArCameraConfig? lhs, ArCameraConfig? rhs) => !(lhs == rhs);
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#if UNITY_ANDROID && !UNITY_EDITOR
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[DllImport("arcore_sdk_c", EntryPoint = "ArCameraConfig_create")]
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static extern void Create(ArSession session, out ArCameraConfig value);
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[DllImport("arcore_sdk_c", EntryPoint = "ArCameraConfig_destroy")]
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static extern void Destroy(ArCameraConfig self);
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[DllImport("arcore_sdk_c", EntryPoint = "ArCameraConfig_getCameraId")]
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static extern void GetCameraId(ArSession session, ArCameraConfig self, out ArString valueOut);
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[DllImport("arcore_sdk_c", EntryPoint = "ArCameraConfig_getDepthSensorUsage")]
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static extern void GetDepthSensorUsage(ArSession session, ArCameraConfig self, out ArCameraConfigDepthSensorUsage valueOut);
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[DllImport("arcore_sdk_c", EntryPoint = "ArCameraConfig_getFacingDirection")]
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static extern void GetFacingDirection(ArSession session, ArCameraConfig self, out ArCameraConfigFacingDirection valueOut);
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[DllImport("arcore_sdk_c", EntryPoint = "ArCameraConfig_getFpsRange")]
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static extern void GetFpsRange(ArSession session, ArCameraConfig self, out int minFps, out int maxFps);
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[DllImport("arcore_sdk_c", EntryPoint = "ArCameraConfig_getImageDimensions")]
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static extern void GetImageDimensions(ArSession session, ArCameraConfig self, out int width, out int height);
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[DllImport("arcore_sdk_c", EntryPoint = "ArCameraConfig_getTextureDimensions")]
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static extern void GetTextureDimensions(ArSession session, ArCameraConfig self, out int width, out int height);
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#else
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static void Create(ArSession session, out ArCameraConfig value) => value = default;
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static void Destroy(ArCameraConfig self) { }
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static void GetCameraId(ArSession session, ArCameraConfig self, out ArString valueOut) => valueOut = default;
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static void GetDepthSensorUsage(ArSession session, ArCameraConfig self, out ArCameraConfigDepthSensorUsage valueOut) =>
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valueOut = default;
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static void GetFacingDirection(ArSession session, ArCameraConfig self, out ArCameraConfigFacingDirection valueOut) =>
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valueOut = default;
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static void GetFpsRange(ArSession session, ArCameraConfig self, out int minFps, out int maxFps)
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{
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minFps = default;
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maxFps = default;
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}
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static void GetImageDimensions(ArSession session, ArCameraConfig self, out int width, out int height)
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{
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width = default;
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height = default;
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}
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static void GetTextureDimensions(ArSession session, ArCameraConfig self, out int width, out int height)
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{
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width = default;
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height = default;
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}
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#endif
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}
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/// <summary>
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/// Extensions to the [XRCameraConfiguration](xref:UnityEngine.XR.ARSubsystems.XRCameraConfiguration) object.
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/// </summary>
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public static class XRCameraConfigurationExtensions
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{
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/// <summary>
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/// Gets <paramref name="cameraConfiguration"/> as an ARCore <see cref="ArCameraConfig"/>.
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/// </summary>
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/// <remarks>
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/// > [!IMPORTANT]
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/// > Do not <see cref="ArCameraConfig.Dispose"/> the returned <see cref="ArCameraConfig"/>.
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/// </remarks>
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/// <param name="cameraConfiguration">The
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/// [XRCameraConfiguration](xref:UnityEngine.XR.ARSubsystems.XRCameraConfiguration) being extended.</param>
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/// <returns>Returns the ARCore-specific representation of <paramref name="cameraConfiguration"/>.</returns>
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public static ArCameraConfig AsArCameraConfig(this XRCameraConfiguration cameraConfiguration) =>
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ArCameraConfig.FromIntPtr(cameraConfiguration.nativeConfigurationHandle);
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}
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}
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