Added UWP alternatives for AccentAnalyzer

Author: Avid29

components/AccentAnalyzer/samples/AccentAnalyzerSample.xaml.cs

@@ -2,8 +2,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
-using Microsoft.UI.Xaml.Media.Imaging;
-
 namespace AccentAnalyzerExperiment.Samples;
 
 /// <summary>

components/AccentAnalyzer/samples/AccentAnalyzerSampleOptionsPane.xaml.cs

@@ -2,7 +2,11 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
+#if !WINDOWS_UWP
 using Microsoft.UI.Xaml.Media.Imaging;
+#elif WINDOWS_UWP
+using Windows.UI.Xaml.Media.Imaging;
+#endif
 
 namespace AccentAnalyzerExperiment.Samples;
 

components/AccentAnalyzer/src/AccentAnalyzer.Clustering.cs

@@ -3,6 +3,7 @@
 // See the LICENSE file in the project root for more information.
 
 using System.Numerics;
+using Windows.UI;
 
 namespace CommunityToolkit.WinUI.Helpers;
 
@@ -21,7 +22,12 @@ private static Vector3[] KMeansCluster(Span<Vector3> points, int k, out int[] co
 
         // Split the points into arbitrary clusters
         // NOTE: Can this be rearranged to converge faster?
+        #if !WINDOWS_UWP
         var offset = Random.Shared.Next(k); // Mathematically true random sampling
+        #elif WINDOWS_UWP
+        var rand = new Random();
+        var offset = rand.Next(k);
+        #endif
         for (int i = 0; i < clusterIds.Length; i++)
             clusterIds[i] = (i + offset) % k;
 
@@ -68,8 +74,14 @@ private static Vector3[] KMeansCluster(Span<Vector3> points, int k, out int[] co
                 pivot--;
                 counts[i] = counts[pivot];
             }
+            
+            #if !WINDOWS_UWP
             counts = counts[..pivot];
             centroids = centroids[..pivot];
+            #elif WINDOWS_UWP
+            Array.Resize(ref counts, pivot);
+            centroids = centroids.Slice(0, pivot);
+            #endif
 
             // Division step in centroid calculation
             for (int i = 0; i < centroids.Length; i++)

components/AccentAnalyzer/src/AccentAnalyzer.Properties.cs

@@ -2,10 +2,15 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
+#if !WINDOWS_UWP
 using Microsoft.UI;
 using Microsoft.UI.Dispatching;
-using System.Windows.Input;
+#elif WINDOWS_UWP
+using Windows.System;
 using Windows.UI;
+#endif
+
+using System.Windows.Input;
 
 
 namespace CommunityToolkit.WinUI.Helpers;

components/AccentAnalyzer/src/AccentAnalyzer.cs

@@ -2,12 +2,18 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
+#if !WINDOWS_UWP
 using Microsoft.UI;
 using Microsoft.UI.Dispatching;
 using Microsoft.UI.Xaml.Media.Imaging;
+#elif WINDOWS_UWP
+using Windows.UI;
+using Windows.UI.Xaml.Media.Imaging;
+#endif
+
 using System.Numerics;
 using System.Windows.Input;
-using Windows.UI;
+using System.Linq;
 
 namespace CommunityToolkit.WinUI.Helpers;
 
@@ -69,8 +75,13 @@ private async Task UpdateAccentAsync()
         // Read the stream into a a color array
         int pos = 0;
         Span<Vector3> colors = new Vector3[(int)stream.Length / 4]; // This should be 4096 (64x64), but it's good to be safe.
+        #if !WINDOWS_UWP
         Span<byte> bytes = stackalloc byte[4];
         while (stream.Read(bytes) > 0)
+        #elif WINDOWS_UWP
+        byte[] bytes = new byte[4];
+        while(stream.Read(bytes, 0, 4) > 0)
+        #endif
         {
             // Safety check to avoid going out of bounds
             // This should never happen, but it's good to be safe.
@@ -86,7 +97,11 @@ private async Task UpdateAccentAsync()
         }
 
         // If we skipped any pixels, trim the span
+        #if !WINDOWS_UWP
         colors = colors[..pos];
+        #elif WINDOWS_UWP
+        colors = colors.Slice(0, pos);
+        #endif
 
         // Determine most prominent colors and assess colorfulness
         int k = 6; // Should this be adjustable?
@@ -106,9 +121,17 @@ private async Task UpdateAccentAsync()
         var baseColor = accentColors.Last();
 
         // Get base color by prominence
+        #if !WINDOWS_UWP
         var dominant = clusters
             .Select((color, i) => (color, sizes[i]))
             .MaxBy(x => x.Item2).color * 255;
+        #elif WINDOWS_UWP
+        var dominant = clusters
+            .Select((color, i) => (color, sizes[i]))
+            .OrderByDescending((x) => x.Item2)
+            .First().color * 255;
+        #endif
+
         var dominantColor = Color.FromArgb(255, (byte)dominant.X, (byte)dominant.Y, (byte)dominant.Z);
 
         // Evaluate colorfulness

components/AccentAnalyzer/src/Dependencies.props

@@ -12,6 +12,7 @@
     <!-- WinUI 2 / UWP -->
     <ItemGroup Condition="'$(IsUwp)' == 'true'">
         <!-- <PackageReference Include="Microsoft.Toolkit.Uwp.UI.Controls.Primitives" Version="7.1.2"/> -->
+         <PackageReference Include="System.Memory" Version="4.6.3"/> 
     </ItemGroup>
 
     <!-- WinUI 2 / Uno -->