From 91adec683db72d5c29879639a913d2cd94e47567 Mon Sep 17 00:00:00 2001
From: Katayama Hirofumi MZ <katayama.hirofumi.mz@gmail.com>
Date: Tue, 14 Nov 2023 19:48:18 +0900
Subject: [PATCH] [SHIMGVW] Add file extension on file save (#5975)

In order to add a filename extension if necessary,
set "png" to OPENFILENAME.lpstrDefExt.
CORE-19222
---
 dll/win32/shimgvw/shimgvw.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/dll/win32/shimgvw/shimgvw.c b/dll/win32/shimgvw/shimgvw.c
index 8fad7c1a7b6..cb167561af2 100644
--- a/dll/win32/shimgvw/shimgvw.c
+++ b/dll/win32/shimgvw/shimgvw.c
@@ -435,8 +435,9 @@ static void pSaveImageAs(HWND hwnd)
     sfn.hInstance   = hInstance;
     sfn.lpstrFile   = szSaveFileName;
     sfn.lpstrFilter = szFilterMask;
-    sfn.nMaxFile    = MAX_PATH;
+    sfn.nMaxFile    = _countof(szSaveFileName);
     sfn.Flags       = OFN_EXPLORER | OFN_OVERWRITEPROMPT | OFN_HIDEREADONLY;
+    sfn.lpstrDefExt = L"png";
 
     c = szFilterMask;