Add new property DisplayInfo.RefreshRate (#1505)

* DisplayInfo: add a property 'RefreshRate' (#1443) * Samples: show RefreshRate on DeviceInfoPage (#1443) * Add documentation for DisplayInfo.RefreshRate (#1443) * Add the logic to read the macos refresh rate Based on xamarin-macios issue: xamarin/xamarin-macios#9958 Copied code from: https://gist.github.com/chamons/1eae64a2e5e10cbaf18b140e92ec4ca3 * Try to guess the Hz, but fall back to 60 This is not the most correct way, but is probably good enough. If there are any better ways in future, we can just add them in or replace this logic. Co-authored-by: Matthew Leibowitz <mattleibow@live.com>
xamarin · Jan 25, 2021 · 90a40a3 · 90a40a3
1 parent db10113
commit 90a40a3
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Showing 16 changed files with 153 additions and 7 deletions.
diff --git a/Samples/Samples/View/DeviceInfoPage.xaml b/Samples/Samples/View/DeviceInfoPage.xaml
@@ -29,6 +29,7 @@
                 <Label Text="{Binding ScreenMetrics.Density, StringFormat='Density: {0}'}" />
                 <Label Text="{Binding ScreenMetrics.Orientation, StringFormat='Orientation: {0}'}" />
                 <Label Text="{Binding ScreenMetrics.Rotation, StringFormat='Rotation: {0}'}" />
+                <Label Text="{Binding ScreenMetrics.RefreshRate, StringFormat='Refresh Rate: {0}'}" />
             </StackLayout>
         </ScrollView>
     </StackLayout>

diff --git a/Xamarin.Essentials/DeviceDisplay/DeviceDisplay.android.cs b/Xamarin.Essentials/DeviceDisplay/DeviceDisplay.android.cs
@@ -34,15 +34,16 @@ static bool PlatformKeepScreenOn
         static DisplayInfo GetMainDisplayInfo()
         {
             using var displayMetrics = new DisplayMetrics();
-            using var display = GetDefaultDisplay();
+            var display = GetDefaultDisplay();
             display?.GetRealMetrics(displayMetrics);
 
             return new DisplayInfo(
                 width: displayMetrics?.WidthPixels ?? 0,
                 height: displayMetrics?.HeightPixels ?? 0,
                 density: displayMetrics?.Density ?? 0,
                 orientation: CalculateOrientation(),
-                rotation: CalculateRotation());
+                rotation: CalculateRotation(),
+                rate: display?.RefreshRate ?? 0);
         }
 
         static void StartScreenMetricsListeners()
@@ -66,7 +67,7 @@ static void OnScreenMetricsChanged()
 
         static DisplayRotation CalculateRotation()
         {
-            using var display = GetDefaultDisplay();
+            var display = GetDefaultDisplay();
 
             return display?.Rotation switch
             {

diff --git a/Xamarin.Essentials/DeviceDisplay/DeviceDisplay.ios.cs b/Xamarin.Essentials/DeviceDisplay/DeviceDisplay.ios.cs
@@ -23,7 +23,8 @@ static DisplayInfo GetMainDisplayInfo()
                 height: bounds.Height * scale,
                 density: scale,
                 orientation: CalculateOrientation(),
-                rotation: CalculateRotation());
+                rotation: CalculateRotation(),
+                rate: UIScreen.MainScreen.MaximumFramesPerSecond);
         }
 
         static void StartScreenMetricsListeners()

diff --git a/Xamarin.Essentials/DeviceDisplay/DeviceDisplay.macos.cs b/Xamarin.Essentials/DeviceDisplay/DeviceDisplay.macos.cs
@@ -1,4 +1,5 @@
 using AppKit;
+using CoreVideo;
 using Foundation;
 
 namespace Xamarin.Essentials
@@ -38,12 +39,22 @@ static DisplayInfo GetMainDisplayInfo()
             var frame = mainScreen.Frame;
             var scale = mainScreen.BackingScaleFactor;
 
+            var mainDisplayId = CoreGraphicsInterop.MainDisplayId;
+
+            // try determine the refresh rate, but fall back to 60Hz
+            var refreshRate = CoreGraphicsInterop.GetRefreshRate(mainDisplayId);
+            if (refreshRate == 0)
+                refreshRate = CVDisplayLinkInterop.GetRefreshRate(mainDisplayId);
+            if (refreshRate == 0)
+                refreshRate = 60.0;
+
             return new DisplayInfo(
                 width: frame.Width,
                 height: frame.Height,
                 density: scale,
                 orientation: DisplayOrientation.Portrait,
-                rotation: DisplayRotation.Rotation0);
+                rotation: DisplayRotation.Rotation0,
+                rate: (float)refreshRate);
         }
 
         static void StartScreenMetricsListeners()

diff --git a/Xamarin.Essentials/DeviceDisplay/DeviceDisplay.shared.cs b/Xamarin.Essentials/DeviceDisplay/DeviceDisplay.shared.cs
@@ -17,7 +17,7 @@ public static bool KeepScreenOn
         public static DisplayInfo MainDisplayInfo => GetMainDisplayInfo();
 
         static void SetCurrent(DisplayInfo metrics) =>
-            currentMetrics = new DisplayInfo(metrics.Width, metrics.Height, metrics.Density, metrics.Orientation, metrics.Rotation);
+            currentMetrics = new DisplayInfo(metrics.Width, metrics.Height, metrics.Density, metrics.Orientation, metrics.Rotation, metrics.RefreshRate);
 
         public static event EventHandler<DisplayInfoChangedEventArgs> MainDisplayInfoChanged
         {

diff --git a/Xamarin.Essentials/DeviceDisplay/DeviceDisplay.uwp.cs b/Xamarin.Essentials/DeviceDisplay/DeviceDisplay.uwp.cs
@@ -1,4 +1,5 @@
 using Windows.Graphics.Display;
+using Windows.Graphics.Display.Core;
 using Windows.System.Display;
 
 namespace Xamarin.Essentials
@@ -54,12 +55,16 @@ static DisplayInfo GetMainDisplayInfo(DisplayInformation di = null)
             var w = di.ScreenWidthInRawPixels;
             var h = di.ScreenHeightInRawPixels;
 
+            var hdi = HdmiDisplayInformation.GetForCurrentView();
+            var hdm = hdi?.GetCurrentDisplayMode();
+
             return new DisplayInfo(
                 width: perpendicular ? h : w,
                 height: perpendicular ? w : h,
                 density: di.LogicalDpi / 96.0,
                 orientation: CalculateOrientation(di),
-                rotation: rotation);
+                rotation: rotation,
+                rate: (float)(hdm?.RefreshRate ?? 0));
         }
 
         static void StartScreenMetricsListeners()

diff --git a/Xamarin.Essentials/Platform/Platform.macos.cs b/Xamarin.Essentials/Platform/Platform.macos.cs
@@ -2,6 +2,7 @@
 using System.Runtime.InteropServices;
 using AppKit;
 using CoreFoundation;
+using CoreVideo;
 using Foundation;
 using ObjCRuntime;
 
@@ -20,6 +21,57 @@ internal static NSWindow GetCurrentWindow(bool throwIfNull = true)
         }
     }
 
+    internal static class CoreGraphicsInterop
+    {
+        public static uint MainDisplayId => CGMainDisplayID();
+
+        [DllImport(Constants.CoreGraphicsLibrary)]
+        static extern IntPtr CGDisplayCopyDisplayMode(uint display);
+
+        [DllImport(Constants.CoreGraphicsLibrary)]
+        static extern void CGDisplayModeRelease(IntPtr mode);
+
+        [DllImport(Constants.CoreGraphicsLibrary)]
+        static extern double CGDisplayModeGetRefreshRate(IntPtr mode);
+
+        [DllImport(Constants.CoreGraphicsLibrary)]
+        static extern uint CGMainDisplayID();
+
+        public static double GetRefreshRate(uint display)
+        {
+            var mode = CGDisplayCopyDisplayMode(display);
+            if (mode == IntPtr.Zero)
+                return 0.0;
+
+            var refreshRate = CGDisplayModeGetRefreshRate(mode);
+
+            CGDisplayModeRelease(mode);
+
+            return refreshRate;
+        }
+    }
+
+    internal static class CVDisplayLinkInterop
+    {
+        [DllImport(Constants.CoreGraphicsLibrary)]
+        static extern int CVDisplayLinkCreateWithCGDisplay(uint display, out IntPtr handle);
+
+        public static double GetRefreshRate(uint display)
+        {
+            var result = CVDisplayLinkCreateWithCGDisplay(display, out var handle);
+            if (result != 0 || handle == IntPtr.Zero)
+                return 0.0;
+
+            using var dl = new CVDisplayLink(handle);
+
+            var period = dl.NominalOutputVideoRefreshPeriod;
+            if (((CVTimeFlags)period.Flags).HasFlag(CVTimeFlags.IsIndefinite) || period.TimeValue == 0)
+                return 0.0;
+
+            return period.TimeScale / (double)period.TimeValue;
+        }
+    }
+
     internal static class IOKit
     {
         const string IOKitLibrary = "/System/Library/Frameworks/IOKit.framework/IOKit";

diff --git a/Xamarin.Essentials/Types/DisplayInfo.shared.cs b/Xamarin.Essentials/Types/DisplayInfo.shared.cs
@@ -12,6 +12,17 @@ public DisplayInfo(double width, double height, double density, DisplayOrientati
             Density = density;
             Orientation = orientation;
             Rotation = rotation;
+            RefreshRate = 0;
+        }
+
+        public DisplayInfo(double width, double height, double density, DisplayOrientation orientation, DisplayRotation rotation, float rate)
+        {
+            Width = width;
+            Height = height;
+            Density = density;
+            Orientation = orientation;
+            Rotation = rotation;
+            RefreshRate = rate;
         }
 
         public double Width { get; }
@@ -24,6 +35,8 @@ public DisplayInfo(double width, double height, double density, DisplayOrientati
 
         public DisplayRotation Rotation { get; }
 
+        public float RefreshRate { get; }
+
         public static bool operator ==(DisplayInfo left, DisplayInfo right) =>
             left.Equals(right);
 

diff --git a/docs/en/FrameworksIndex/xamarin-essentials-android.xml b/docs/en/FrameworksIndex/xamarin-essentials-android.xml
@@ -313,6 +313,7 @@
     </Type>
     <Type Name="Xamarin.Essentials.DisplayInfo" Id="T:Xamarin.Essentials.DisplayInfo">
       <Member Id="M:Xamarin.Essentials.DisplayInfo.#ctor(System.Double,System.Double,System.Double,Xamarin.Essentials.DisplayOrientation,Xamarin.Essentials.DisplayRotation)" />
+      <Member Id="M:Xamarin.Essentials.DisplayInfo.#ctor(System.Double,System.Double,System.Double,Xamarin.Essentials.DisplayOrientation,Xamarin.Essentials.DisplayRotation,System.Single)" />
       <Member Id="M:Xamarin.Essentials.DisplayInfo.Equals(System.Object)" />
       <Member Id="M:Xamarin.Essentials.DisplayInfo.Equals(Xamarin.Essentials.DisplayInfo)" />
       <Member Id="M:Xamarin.Essentials.DisplayInfo.GetHashCode" />
@@ -322,6 +323,7 @@
       <Member Id="P:Xamarin.Essentials.DisplayInfo.Density" />
       <Member Id="P:Xamarin.Essentials.DisplayInfo.Height" />
       <Member Id="P:Xamarin.Essentials.DisplayInfo.Orientation" />
+      <Member Id="P:Xamarin.Essentials.DisplayInfo.RefreshRate" />
       <Member Id="P:Xamarin.Essentials.DisplayInfo.Rotation" />
       <Member Id="P:Xamarin.Essentials.DisplayInfo.Width" />
     </Type>

diff --git a/docs/en/FrameworksIndex/xamarin-essentials-ios.xml b/docs/en/FrameworksIndex/xamarin-essentials-ios.xml
@@ -301,6 +301,7 @@
     </Type>
     <Type Name="Xamarin.Essentials.DisplayInfo" Id="T:Xamarin.Essentials.DisplayInfo">
       <Member Id="M:Xamarin.Essentials.DisplayInfo.#ctor(System.Double,System.Double,System.Double,Xamarin.Essentials.DisplayOrientation,Xamarin.Essentials.DisplayRotation)" />
+      <Member Id="M:Xamarin.Essentials.DisplayInfo.#ctor(System.Double,System.Double,System.Double,Xamarin.Essentials.DisplayOrientation,Xamarin.Essentials.DisplayRotation,System.Single)" />
       <Member Id="M:Xamarin.Essentials.DisplayInfo.Equals(System.Object)" />
       <Member Id="M:Xamarin.Essentials.DisplayInfo.Equals(Xamarin.Essentials.DisplayInfo)" />
       <Member Id="M:Xamarin.Essentials.DisplayInfo.GetHashCode" />
@@ -310,6 +311,7 @@
       <Member Id="P:Xamarin.Essentials.DisplayInfo.Density" />
       <Member Id="P:Xamarin.Essentials.DisplayInfo.Height" />
       <Member Id="P:Xamarin.Essentials.DisplayInfo.Orientation" />
+      <Member Id="P:Xamarin.Essentials.DisplayInfo.RefreshRate" />
       <Member Id="P:Xamarin.Essentials.DisplayInfo.Rotation" />
       <Member Id="P:Xamarin.Essentials.DisplayInfo.Width" />
     </Type>

diff --git a/docs/en/FrameworksIndex/xamarin-essentials-macos.xml b/docs/en/FrameworksIndex/xamarin-essentials-macos.xml
@@ -300,6 +300,7 @@
     </Type>
     <Type Name="Xamarin.Essentials.DisplayInfo" Id="T:Xamarin.Essentials.DisplayInfo">
       <Member Id="M:Xamarin.Essentials.DisplayInfo.#ctor(System.Double,System.Double,System.Double,Xamarin.Essentials.DisplayOrientation,Xamarin.Essentials.DisplayRotation)" />
+      <Member Id="M:Xamarin.Essentials.DisplayInfo.#ctor(System.Double,System.Double,System.Double,Xamarin.Essentials.DisplayOrientation,Xamarin.Essentials.DisplayRotation,System.Single)" />
       <Member Id="M:Xamarin.Essentials.DisplayInfo.Equals(System.Object)" />
       <Member Id="M:Xamarin.Essentials.DisplayInfo.Equals(Xamarin.Essentials.DisplayInfo)" />
       <Member Id="M:Xamarin.Essentials.DisplayInfo.GetHashCode" />
@@ -309,6 +310,7 @@
       <Member Id="P:Xamarin.Essentials.DisplayInfo.Density" />
       <Member Id="P:Xamarin.Essentials.DisplayInfo.Height" />
       <Member Id="P:Xamarin.Essentials.DisplayInfo.Orientation" />
+      <Member Id="P:Xamarin.Essentials.DisplayInfo.RefreshRate" />
       <Member Id="P:Xamarin.Essentials.DisplayInfo.Rotation" />
       <Member Id="P:Xamarin.Essentials.DisplayInfo.Width" />
     </Type>

diff --git a/docs/en/FrameworksIndex/xamarin-essentials-tvos.xml b/docs/en/FrameworksIndex/xamarin-essentials-tvos.xml
@@ -300,6 +300,7 @@
     </Type>
     <Type Name="Xamarin.Essentials.DisplayInfo" Id="T:Xamarin.Essentials.DisplayInfo">
       <Member Id="M:Xamarin.Essentials.DisplayInfo.#ctor(System.Double,System.Double,System.Double,Xamarin.Essentials.DisplayOrientation,Xamarin.Essentials.DisplayRotation)" />
+      <Member Id="M:Xamarin.Essentials.DisplayInfo.#ctor(System.Double,System.Double,System.Double,Xamarin.Essentials.DisplayOrientation,Xamarin.Essentials.DisplayRotation,System.Single)" />
       <Member Id="M:Xamarin.Essentials.DisplayInfo.Equals(System.Object)" />
       <Member Id="M:Xamarin.Essentials.DisplayInfo.Equals(Xamarin.Essentials.DisplayInfo)" />
       <Member Id="M:Xamarin.Essentials.DisplayInfo.GetHashCode" />
@@ -309,6 +310,7 @@
       <Member Id="P:Xamarin.Essentials.DisplayInfo.Density" />
       <Member Id="P:Xamarin.Essentials.DisplayInfo.Height" />
       <Member Id="P:Xamarin.Essentials.DisplayInfo.Orientation" />
+      <Member Id="P:Xamarin.Essentials.DisplayInfo.RefreshRate" />
       <Member Id="P:Xamarin.Essentials.DisplayInfo.Rotation" />
       <Member Id="P:Xamarin.Essentials.DisplayInfo.Width" />
     </Type>

diff --git a/docs/en/FrameworksIndex/xamarin-essentials-uwp.xml b/docs/en/FrameworksIndex/xamarin-essentials-uwp.xml
@@ -302,6 +302,7 @@
     </Type>
     <Type Name="Xamarin.Essentials.DisplayInfo" Id="T:Xamarin.Essentials.DisplayInfo">
       <Member Id="M:Xamarin.Essentials.DisplayInfo.#ctor(System.Double,System.Double,System.Double,Xamarin.Essentials.DisplayOrientation,Xamarin.Essentials.DisplayRotation)" />
+      <Member Id="M:Xamarin.Essentials.DisplayInfo.#ctor(System.Double,System.Double,System.Double,Xamarin.Essentials.DisplayOrientation,Xamarin.Essentials.DisplayRotation,System.Single)" />
       <Member Id="M:Xamarin.Essentials.DisplayInfo.Equals(System.Object)" />
       <Member Id="M:Xamarin.Essentials.DisplayInfo.Equals(Xamarin.Essentials.DisplayInfo)" />
       <Member Id="M:Xamarin.Essentials.DisplayInfo.GetHashCode" />
@@ -311,6 +312,7 @@
       <Member Id="P:Xamarin.Essentials.DisplayInfo.Density" />
       <Member Id="P:Xamarin.Essentials.DisplayInfo.Height" />
       <Member Id="P:Xamarin.Essentials.DisplayInfo.Orientation" />
+      <Member Id="P:Xamarin.Essentials.DisplayInfo.RefreshRate" />
       <Member Id="P:Xamarin.Essentials.DisplayInfo.Rotation" />
       <Member Id="P:Xamarin.Essentials.DisplayInfo.Width" />
     </Type>

diff --git a/docs/en/FrameworksIndex/xamarin-essentials-watchos.xml b/docs/en/FrameworksIndex/xamarin-essentials-watchos.xml
@@ -300,6 +300,7 @@
     </Type>
     <Type Name="Xamarin.Essentials.DisplayInfo" Id="T:Xamarin.Essentials.DisplayInfo">
       <Member Id="M:Xamarin.Essentials.DisplayInfo.#ctor(System.Double,System.Double,System.Double,Xamarin.Essentials.DisplayOrientation,Xamarin.Essentials.DisplayRotation)" />
+      <Member Id="M:Xamarin.Essentials.DisplayInfo.#ctor(System.Double,System.Double,System.Double,Xamarin.Essentials.DisplayOrientation,Xamarin.Essentials.DisplayRotation,System.Single)" />
       <Member Id="M:Xamarin.Essentials.DisplayInfo.Equals(System.Object)" />
       <Member Id="M:Xamarin.Essentials.DisplayInfo.Equals(Xamarin.Essentials.DisplayInfo)" />
       <Member Id="M:Xamarin.Essentials.DisplayInfo.GetHashCode" />
@@ -309,6 +310,7 @@
       <Member Id="P:Xamarin.Essentials.DisplayInfo.Density" />
       <Member Id="P:Xamarin.Essentials.DisplayInfo.Height" />
       <Member Id="P:Xamarin.Essentials.DisplayInfo.Orientation" />
+      <Member Id="P:Xamarin.Essentials.DisplayInfo.RefreshRate" />
       <Member Id="P:Xamarin.Essentials.DisplayInfo.Rotation" />
       <Member Id="P:Xamarin.Essentials.DisplayInfo.Width" />
     </Type>

diff --git a/docs/en/FrameworksIndex/xamarin-essentials.xml b/docs/en/FrameworksIndex/xamarin-essentials.xml
@@ -299,6 +299,7 @@
     </Type>
     <Type Name="Xamarin.Essentials.DisplayInfo" Id="T:Xamarin.Essentials.DisplayInfo">
       <Member Id="M:Xamarin.Essentials.DisplayInfo.#ctor(System.Double,System.Double,System.Double,Xamarin.Essentials.DisplayOrientation,Xamarin.Essentials.DisplayRotation)" />
+      <Member Id="M:Xamarin.Essentials.DisplayInfo.#ctor(System.Double,System.Double,System.Double,Xamarin.Essentials.DisplayOrientation,Xamarin.Essentials.DisplayRotation,System.Single)" />
       <Member Id="M:Xamarin.Essentials.DisplayInfo.Equals(System.Object)" />
       <Member Id="M:Xamarin.Essentials.DisplayInfo.Equals(Xamarin.Essentials.DisplayInfo)" />
       <Member Id="M:Xamarin.Essentials.DisplayInfo.GetHashCode" />
@@ -308,6 +309,7 @@
       <Member Id="P:Xamarin.Essentials.DisplayInfo.Density" />
       <Member Id="P:Xamarin.Essentials.DisplayInfo.Height" />
       <Member Id="P:Xamarin.Essentials.DisplayInfo.Orientation" />
+      <Member Id="P:Xamarin.Essentials.DisplayInfo.RefreshRate" />
       <Member Id="P:Xamarin.Essentials.DisplayInfo.Rotation" />
       <Member Id="P:Xamarin.Essentials.DisplayInfo.Width" />
     </Type>

diff --git a/docs/en/Xamarin.Essentials/DisplayInfo.xml b/docs/en/Xamarin.Essentials/DisplayInfo.xml
@@ -50,6 +50,34 @@
         <remarks>To be added.</remarks>
       </Docs>
     </Member>
+    <Member MemberName=".ctor">
+      <MemberSignature Language="C#" Value="public DisplayInfo (double width, double height, double density, Xamarin.Essentials.DisplayOrientation orientation, Xamarin.Essentials.DisplayRotation rotation, float rate);" />
+      <MemberSignature Language="ILAsm" Value=".method public hidebysig specialname rtspecialname instance void .ctor(float64 width, float64 height, float64 density, valuetype Xamarin.Essentials.DisplayOrientation orientation, valuetype Xamarin.Essentials.DisplayRotation rotation, float32 rate) cil managed" />
+      <MemberSignature Language="DocId" Value="M:Xamarin.Essentials.DisplayInfo.#ctor(System.Double,System.Double,System.Double,Xamarin.Essentials.DisplayOrientation,Xamarin.Essentials.DisplayRotation,System.Single)" />
+      <MemberType>Constructor</MemberType>
+      <AssemblyInfo>
+        <AssemblyName>Xamarin.Essentials</AssemblyName>
+        <AssemblyVersion>1.0.0.0</AssemblyVersion>
+      </AssemblyInfo>
+      <Parameters>
+        <Parameter Name="width" Type="System.Double" />
+        <Parameter Name="height" Type="System.Double" />
+        <Parameter Name="density" Type="System.Double" />
+        <Parameter Name="orientation" Type="Xamarin.Essentials.DisplayOrientation" />
+        <Parameter Name="rotation" Type="Xamarin.Essentials.DisplayRotation" />
+        <Parameter Name="rate" Type="System.Single" />
+      </Parameters>
+      <Docs>
+        <param name="width">The width of the display</param>
+        <param name="height">The height of the display</param>
+        <param name="density">The screen density</param>
+        <param name="orientation">The current orientation</param>
+        <param name="rotation">The rotation of the device.</param>
+        <param name="rate">The refresh rate of the display.</param>
+        <summary>Main constructor for Display Information</summary>
+        <remarks>To be added.</remarks>
+      </Docs>
+    </Member>
     <Member MemberName="Density">
       <MemberSignature Language="C#" Value="public double Density { get; }" />
       <MemberSignature Language="ILAsm" Value=".property instance float64 Density" />
@@ -222,6 +250,26 @@
         <remarks></remarks>
       </Docs>
     </Member>
+    <Member MemberName="RefreshRate">
+      <MemberSignature Language="C#" Value="public float RefreshRate { get; }" />
+      <MemberSignature Language="ILAsm" Value=".property instance float32 RefreshRate" />
+      <MemberSignature Language="DocId" Value="P:Xamarin.Essentials.DisplayInfo.RefreshRate" />
+      <MemberType>Property</MemberType>
+      <AssemblyInfo>
+        <AssemblyName>Xamarin.Essentials</AssemblyName>
+        <AssemblyVersion>1.0.0.0</AssemblyVersion>
+      </AssemblyInfo>
+      <ReturnValue>
+        <ReturnType>System.Single</ReturnType>
+      </ReturnValue>
+      <Docs>
+        <summary>Gets the refresh rate of the display.</summary>
+        <value>The refresh rate in Hz.</value>
+        <remarks>
+          <para></para>
+        </remarks>
+      </Docs>
+    </Member>
     <Member MemberName="Rotation">
       <MemberSignature Language="C#" Value="public Xamarin.Essentials.DisplayRotation Rotation { get; }" />
       <MemberSignature Language="ILAsm" Value=".property instance valuetype Xamarin.Essentials.DisplayRotation Rotation" />