From 5f42b92027fcaff9bd1263c9e832ce407cedb4d6 Mon Sep 17 00:00:00 2001
From: David Rose <david@ddrose.com>
Date: Mon, 14 Mar 2011 20:09:06 +0000
Subject: [PATCH] filename extension check should be case-insensitive

---
 panda/src/pnmimage/pnmFileTypeRegistry.cxx | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/panda/src/pnmimage/pnmFileTypeRegistry.cxx b/panda/src/pnmimage/pnmFileTypeRegistry.cxx
index 283e945ac4..b967714d68 100644
--- a/panda/src/pnmimage/pnmFileTypeRegistry.cxx
+++ b/panda/src/pnmimage/pnmFileTypeRegistry.cxx
@@ -164,8 +164,15 @@ get_type_from_extension(const string &filename) const {
   Extensions::const_iterator ei;
   ei = _extensions.find(extension);
   if (ei == _extensions.end() || (*ei).second.empty()) {
-    // Nothing matches that string.
-    return NULL;
+    // Nothing matches that string.  Try again with a downcased string
+    // in case we got an all-uppercase filename (most of our
+    // extensions are downcased).
+    ei = _extensions.find(downcase(extension));
+
+    if (ei == _extensions.end() || (*ei).second.empty()) {
+      // Nothing matches that string.
+      return NULL;
+    }
   }
 
   // Return the first file type associated with the given extension.