From fa5a732b6883c62cb5207fd4363e83348709979b Mon Sep 17 00:00:00 2001
From: tildearrow <tildearrow@protonmail.com>
Date: Tue, 8 Feb 2022 23:13:54 -0500
Subject: [PATCH] GUI: extensions no longer case-sensitive

fixes #154
---
 extern/igfd/ImGuiFileDialog.cpp | 4 ++++
 src/gui/gui.cpp                 | 6 +++++-
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/extern/igfd/ImGuiFileDialog.cpp b/extern/igfd/ImGuiFileDialog.cpp
index 4b8be969..3300d4e0 100644
--- a/extern/igfd/ImGuiFileDialog.cpp
+++ b/extern/igfd/ImGuiFileDialog.cpp
@@ -1475,6 +1475,10 @@ namespace IGFD
 				infos->fileExt = infos->fileNameExt.substr(lpt);
 			}
 
+      for (char& i: infos->fileExt) {
+        if (i>='A' && i<='Z') i+='a'-'A';
+      }
+
 			if (!vFileDialogInternal.puFilterManager.IsCoveredByFilters(infos->fileExt))
 			{
 				return;
diff --git a/src/gui/gui.cpp b/src/gui/gui.cpp
index 041394ef..27a77089 100644
--- a/src/gui/gui.cpp
+++ b/src/gui/gui.cpp
@@ -5511,7 +5511,11 @@ void FurnaceGUI::processDrags(int dragX, int dragY) {
   }
 
 #define checkExtension(x) \
-  if (fileName.size()<4 || fileName.rfind(x)!=fileName.size()-4) { \
+  String lowerCase=fileName; \
+  for (char& i: lowerCase) { \
+    if (i>='A' && i<='Z') i+='a'-'A'; \
+  } \
+  if (lowerCase.size()<4 || lowerCase.rfind(x)!=lowerCase.size()-4) { \
     fileName+=x; \
   }