From 6be72c1f5cf102a34b62eab7ab0de0c506dbf0a4 Mon Sep 17 00:00:00 2001
From: LD-Reborn <lucretia.dietz@gmx.de>
Date: Thu, 20 Nov 2025 15:14:06 +0100
Subject: [PATCH] Fixed high memory usage and slow image encoding times for
 user images

---
 src/Helpers/ImageHelper.cs | 19 ++++++++++---------
 1 file changed, 10 insertions(+), 9 deletions(-)

diff --git a/src/Helpers/ImageHelper.cs b/src/Helpers/ImageHelper.cs
index 49834de..75d15e4 100644
--- a/src/Helpers/ImageHelper.cs
+++ b/src/Helpers/ImageHelper.cs
@@ -1,11 +1,7 @@
 using SixLabors.ImageSharp;
 using SixLabors.ImageSharp.Processing;
-using SixLabors.ImageSharp.Formats.Jpeg;
-using System.IO;
-using SixLabors.ImageSharp.Formats.Gif;
-using SixLabors.ImageSharp.Processing.Processors.Quantization;
-using SixLabors.ImageSharp.Formats.Png;
 using SixLabors.ImageSharp.Formats.Webp;
+using SixLabors.ImageSharp.Formats;
 
 namespace Berufsschule_HAM.Helpers;
 
@@ -14,9 +10,14 @@ public static class ImageHelper
     public static string ResizeAndConvertToBase64(byte[] imageBytes, int size = 32)
     {
         using var inputStream = new MemoryStream(imageBytes);
-        using var image = Image.Load(inputStream);
 
-        // Optional: crop to square before resize
+        var decoderOptions = new DecoderOptions
+        {
+            TargetSize = new Size(size, size)
+        };
+
+        using var image = Image.Load(decoderOptions, inputStream);
+
         int minDimension = Math.Min(image.Width, image.Height);
         var cropRectangle = new Rectangle(
             (image.Width - minDimension) / 2,
@@ -35,7 +36,7 @@ public static class ImageHelper
         });
 
         using var outputStream = new MemoryStream();
-        image.Save(outputStream, new WebpEncoder(){});
-        return Convert.ToBase64String(outputStream.ToArray());
+        image.Save(outputStream, new WebpEncoder());
+        return Convert.ToBase64String(outputStream.GetBuffer(), 0, (int)outputStream.Length);
     }
 }
\ No newline at end of file