Switched to ThumbHasher over BlurHasher

ThumbHash/Models/ThumbHasher.cs

@@ -0,0 +1,57 @@
+using SkiaSharp;
+using View_by_Distance.Shared.Models.Methods;
+
+namespace View_by_Distance.ThumbHash.Models;
+
+public class C2_ThumbHasher : IThumbHasher
+{
+
+    private static SKBitmap GetBitmap(string path)
+    {
+        SKBitmap result;
+        using SKBitmap skBitmap = SKBitmap.Decode(path);
+        result = skBitmap.Copy(SKColorType.Rgba8888);
+        return result;
+    }
+
+    private static byte[] Encode(SKBitmap skBitmap) =>
+        ThumbHash.RgbaToThumbHash(skBitmap.Width, skBitmap.Height, skBitmap.GetPixelSpan());
+
+    private static byte[] Encode(string path)
+    {
+        byte[] results;
+        using SKBitmap skBitmap = GetBitmap(path);
+        results = Encode(skBitmap);
+        return results;
+    }
+
+    byte[] IThumbHasher.Encode(string path) =>
+        Encode(path);
+
+    private static MemoryStream GetMemoryStream(byte[] thumbHashBytes, int width, int height)
+    {
+        MemoryStream result = new();
+        (int w, int h) = (width / 2, height / 2);
+        using SKManagedWStream skManagedWStream = new(result);
+        byte[] bytes = ThumbHash.ThumbHashToRgba(thumbHashBytes, w, h);
+        SKImageInfo skImageInfo = new(w, h, SKColorType.Rgba8888, SKAlphaType.Unpremul);
+        using SKImage skImage = SKImage.FromPixelCopy(skImageInfo, bytes);
+        using SKData sdData = skImage.Encode(SKEncodedImageFormat.Png, 100);
+        sdData.SaveTo(result);
+        return result;
+    }
+
+    MemoryStream IThumbHasher.GetMemoryStream(byte[] thumbHashBytes, int width, int height) =>
+        GetMemoryStream(thumbHashBytes, width, height);
+
+    (byte[], MemoryStream) IThumbHasher.EncodeAndSave(string path, int width, int height)
+    {
+        byte[] results;
+        MemoryStream result;
+        using SKBitmap skBitmap = GetBitmap(path);
+        results = Encode(skBitmap);
+        result = GetMemoryStream(results, width, height);
+        return (results, result);
+    }
+
+}