From bfa8e2444e7d704f51e255765a812aa827416642 Mon Sep 17 00:00:00 2001
From: Robin Krom <robin@getgreenshot.org>
Date: Thu, 30 Jun 2022 23:34:51 +0200
Subject: [PATCH] This should hopefully fix an overflow exception while
 decoding the dib format.

---
 .../FileFormatHandlers/DibFileFormatHandler.cs                 | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/Greenshot.Editor/FileFormatHandlers/DibFileFormatHandler.cs b/src/Greenshot.Editor/FileFormatHandlers/DibFileFormatHandler.cs
index ad129c4ba..b14a33bd0 100644
--- a/src/Greenshot.Editor/FileFormatHandlers/DibFileFormatHandler.cs
+++ b/src/Greenshot.Editor/FileFormatHandlers/DibFileFormatHandler.cs
@@ -100,8 +100,7 @@ namespace Greenshot.Editor.FileFormatHandlers
                 bitmap = new Bitmap(infoHeader.Width, infoHeader.Height,
                         -(int)(infoHeader.SizeImage / infoHeader.Height),
                         infoHeader.BitCount == 32 ? PixelFormat.Format32bppArgb : PixelFormat.Format24bppRgb,
-                        new IntPtr(handle.AddrOfPinnedObject().ToInt32() + infoHeader.OffsetToPixels +
-                                   (infoHeader.Height - 1) * (int)(infoHeader.SizeImage / infoHeader.Height))
+                        IntPtr.Add(handle.AddrOfPinnedObject(), (int)infoHeader.OffsetToPixels + (infoHeader.Height - 1) * (int)(infoHeader.SizeImage / infoHeader.Height))
                     );
             }
             catch (Exception ex)