From ee424d4f8739d2e869f05d1c89aa43b4b22b7040 Mon Sep 17 00:00:00 2001
From: Dmitry Pentin <riotbr3aker@gmail.com>
Date: Sat, 17 Jul 2021 23:44:45 +0300
Subject: [PATCH] Revert "Simplified quantization table scaling in the encoder"

This reverts commit b16301b631520a778f2af29acfbeeeebad177bcc.
---
 src/ImageSharp/Formats/Jpeg/JpegEncoderCore.cs | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/src/ImageSharp/Formats/Jpeg/JpegEncoderCore.cs b/src/ImageSharp/Formats/Jpeg/JpegEncoderCore.cs
index f3fddd9e0d..8711483355 100644
--- a/src/ImageSharp/Formats/Jpeg/JpegEncoderCore.cs
+++ b/src/ImageSharp/Formats/Jpeg/JpegEncoderCore.cs
@@ -664,8 +664,19 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
 
             for (int j = 0; j < Block8x8F.Size; j++)
             {
-                int scaled = ((unscaledQuant[j] * scale) + 50) / 100;
-                quant[j] = Math.Clamp(scaled, 1, 255);
+                int x = unscaledQuant[j];
+                x = ((x * scale) + 50) / 100;
+                if (x < 1)
+                {
+                    x = 1;
+                }
+
+                if (x > 255)
+                {
+                    x = 255;
+                }
+
+                quant[j] = x;
             }
         }
     }