From 253122dc78a1bd2b63c13271191ee121cb8cb112 Mon Sep 17 00:00:00 2001
From: Jon Evans <jon@craftyjon.com>
Date: Wed, 11 Jan 2023 21:07:50 -0500
Subject: [PATCH] BITMAP_BASE: update original when converting to greyscale

Fixes https://gitlab.com/kicad/code/kicad/-/issues/13487
---
 common/bitmap_base.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/common/bitmap_base.cpp b/common/bitmap_base.cpp
index 9b547a3ac9..1d6b4ad102 100644
--- a/common/bitmap_base.cpp
+++ b/common/bitmap_base.cpp
@@ -393,6 +393,7 @@ void BITMAP_BASE::ConvertToGreyscale()
     if( m_image )
     {
         *m_image  = m_image->ConvertToGreyscale();
+        *m_originalImage = m_originalImage->ConvertToGreyscale();
         rebuildBitmap();
     }
 }