From 65e5c3dbc7393d4d18bcaeb9a58486e5aed416ee Mon Sep 17 00:00:00 2001
From: Vadim Zeitlin <vadim@wxwidgets.org>
Date: Thu, 16 May 2019 22:17:06 +0200
Subject: [PATCH] Avoid invalidating the best size in wxStaticBitmap
 unnecessarily

This is just a micro-optimization: there is no need to call
InvalidateBestSize() if the size of the bitmap doesn't actually change
(as will most often be the case when this method is called after the
control creation).
---
 src/msw/statbmp.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/msw/statbmp.cpp b/src/msw/statbmp.cpp
index c21fbd8fa0..2a0ad74624 100644
--- a/src/msw/statbmp.cpp
+++ b/src/msw/statbmp.cpp
@@ -287,7 +287,9 @@ void wxStaticBitmap::SetImageNoCopy( wxGDIImage* image)
         sizeNew = image->GetSize();
 
     Free();
-    InvalidateBestSize();
+
+    if ( sizeNew != sizeOld )
+        InvalidateBestSize();
 
     m_isIcon = image->IsKindOf( wxCLASSINFO(wxIcon) );
     // the image has already been copied