From c64ac5f8ecaa63707f72eaabf8a9ba94032feb04 Mon Sep 17 00:00:00 2001
From: Dmitry Pentin <riotbr3aker@gmail.com>
Date: Wed, 28 Jul 2021 00:19:52 +0300
Subject: [PATCH] Comments, quantization table scaling with clamp call

---
 .../Formats/Jpeg/Components/Quantization.cs       | 15 ++-------------
 src/ImageSharp/Formats/Jpeg/JpegMetadata.cs       |  7 +++++++
 2 files changed, 9 insertions(+), 13 deletions(-)

diff --git a/src/ImageSharp/Formats/Jpeg/Components/Quantization.cs b/src/ImageSharp/Formats/Jpeg/Components/Quantization.cs
index 7e528d056..394ad71af 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Quantization.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Quantization.cs
@@ -179,19 +179,8 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components
             Block8x8F table = default;
             for (int j = 0; j < Block8x8F.Size; j++)
             {
-                int x = unscaledTable[j];
-                x = ((x * scale) + 50) / 100;
-                if (x < 1)
-                {
-                    x = 1;
-                }
-
-                if (x > 255)
-                {
-                    x = 255;
-                }
-
-                table[j] = x;
+                int x = ((unscaledTable[j] * scale) + 50) / 100;
+                table[j] = Numerics.Clamp(x, 1, 255);
             }
 
             return table;
diff --git a/src/ImageSharp/Formats/Jpeg/JpegMetadata.cs b/src/ImageSharp/Formats/Jpeg/JpegMetadata.cs
index 1b17bdce7..0a4b970f4 100644
--- a/src/ImageSharp/Formats/Jpeg/JpegMetadata.cs
+++ b/src/ImageSharp/Formats/Jpeg/JpegMetadata.cs
@@ -11,7 +11,14 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
     /// </summary>
     public class JpegMetadata : IDeepCloneable
     {
+        /// <summary>
+        /// Backing field for <see cref="LuminanceQuality"/>
+        /// </summary>
         private int? luminanceQuality;
+
+        /// <summary>
+        /// Backing field for <see cref="ChrominanceQuality"/>
+        /// </summary>
         private int? chrominanceQuality;
 
         /// <summary>