205 lines
9.7 KiB
C#
205 lines
9.7 KiB
C#
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using System;
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#if UNITY_ANDROID
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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 the configuration for an <see cref="ArSession"/>.
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/// </summary>
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/// <remarks>
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/// This is an opaque object that represents a native
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/// [ArConfig](https://developers.google.com/ar/reference/c/group/ar-config).
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/// </remarks>
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/// <seealso cref="ARCoreSessionSubsystem.beforeSetConfiguration"/>
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/// <seealso cref="ARCoreBeforeSetConfigurationEventArgs"/>
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public struct ArConfig : IEquatable<ArConfig>, IDisposable
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{
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IntPtr m_Self;
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ArConfig(IntPtr value) => m_Self = value;
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/// <summary>
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/// Creates a new session configuration and initializes it to a sensible default configuration.
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/// </summary>
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/// <remarks>
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/// Plane detection and Lighting Estimation are enabled, and blocking update is selected. This configuration is
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/// guaranteed to be supported on all devices that support ARCore.
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///
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/// When you no longer need the <see cref="ArConfig"/>, you should destroy it by calling
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/// <see cref="Dispose"/>. If you do not dispose it, ARCore will leak memory.
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/// </remarks>
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/// <param name="session">A non-null <see cref="ArSession"/>.</param>
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public ArConfig(ArSession session) => Create(session, out this);
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/// <summary>
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/// Creates an <see cref="ArConfig"/> from an existing native pointer. The native pointer must point
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/// to an existing <see cref="ArConfig"/>.
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/// </summary>
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/// <param name="value">A pointer to an existing native <see cref="ArConfig"/>.</param>
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/// <returns>Returns an <see cref="ArConfig"/> whose underlying native pointer is
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/// <paramref name="value"/>.</returns>
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public static ArConfig FromIntPtr(IntPtr value) => new ArConfig(value);
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/// <summary>
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/// Represents a null <see cref="ArConfig"/>, 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 ArConfig Null => default;
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/// <summary>
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/// (Read Only) Indicates whether this <see cref="ArConfig"/> 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="ArConfig"/>.
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/// </summary>
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/// <returns>Returns the underlying native pointer for this <see cref="ArConfig"/>.</returns>
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public IntPtr AsIntPtr() => m_Self;
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/// <summary>
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/// Casts an <see cref="ArConfig"/> to its underlying native pointer.
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/// </summary>
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/// <param name="config">The <see cref="ArConfig"/> to cast.</param>
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/// <returns>Returns the underlying native pointer for <paramref name="config"/></returns>
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public static explicit operator IntPtr(ArConfig config) => config.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="ArConfig"/>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="ArConfig"/> 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(ArConfig 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="ArConfig"/> and it compares
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/// equal to this one using <see cref="Equals(UnityEngine.XR.ARCore.ArConfig)"/>.</returns>
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public override bool Equals(object obj) => obj is ArConfig 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="ArConfig"/>.</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.ArConfig)"/>.
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/// </summary>
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/// <param name="lhs">The <see cref="ArConfig"/> to compare with <paramref name="rhs"/>.</param>
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/// <param name="rhs">The <see cref="ArConfig"/> 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.ArConfig)"/>. Returns `false` otherwise.</returns>
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public static bool operator ==(ArConfig lhs, ArConfig 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.ArConfig)"/>.
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/// </summary>
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/// <param name="lhs">The <see cref="ArConfig"/> to compare with <paramref name="rhs"/>.</param>
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/// <param name="rhs">The <see cref="ArConfig"/> 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.ArConfig)"/>. Returns `true` otherwise.</returns>
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public static bool operator !=(ArConfig lhs, ArConfig rhs) => !lhs.Equals(rhs);
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/// <summary>
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/// Destroys this <see cref="ArConfig"/> and sets the underlying native pointer to `null`.
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/// </summary>
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/// <remarks>
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/// You should only dispose an <see cref="ArConfig"/> if you explicitly created it, e.g., by calling
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/// <see cref="ArConfig(ArSession)"/>. If you convert an existing config from an
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/// <see cref="IntPtr"/> (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 = IntPtr.Zero;;
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}
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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="ArConfig"/> 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(ArConfig 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="ArConfig"/> to compare with <paramref name="rhs"/>.</param>
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/// <param name="rhs">The nullable <see cref="ArConfig"/> 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 ==(ArConfig? lhs, ArConfig? 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="ArConfig"/> 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(ArConfig 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 !=(ArConfig? lhs, ArConfig? rhs) => !(lhs == rhs);
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#if UNITY_EDITOR
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static void Create(ArSession session, out ArConfig configOut) => configOut = default;
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static void Destroy(ArConfig config) { }
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#elif UNITY_ANDROID
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[DllImport("arcore_sdk_c", EntryPoint = "ArConfig_create")]
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static extern void Create(ArSession session, out ArConfig configOut);
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[DllImport("arcore_sdk_c", EntryPoint = "ArConfig_destroy")]
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static extern void Destroy(ArConfig config);
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#endif
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}
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}
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