From 8f7527ede0b4caca8d68aa01fefafbc022ab1a3f Mon Sep 17 00:00:00 2001
From: frohlich <frohlich>
Date: Tue, 19 May 2009 05:30:16 +0000
Subject: [PATCH] Restore the special capability of the btg reader to read
 compressed files.

Modified Files:
 	scene/tgdb/SGReaderWriterBTG.cxx
 	scene/tgdb/SGReaderWriterBTG.hxx
---
 simgear/scene/tgdb/SGReaderWriterBTG.cxx | 9 +++++++++
 simgear/scene/tgdb/SGReaderWriterBTG.hxx | 1 +
 2 files changed, 10 insertions(+)

diff --git a/simgear/scene/tgdb/SGReaderWriterBTG.cxx b/simgear/scene/tgdb/SGReaderWriterBTG.cxx
index 1fa3e981..90341f96 100644
--- a/simgear/scene/tgdb/SGReaderWriterBTG.cxx
+++ b/simgear/scene/tgdb/SGReaderWriterBTG.cxx
@@ -45,6 +45,15 @@ const char* SGReaderWriterBTG::className() const
     return "BTG Database reader";
 }
 
+bool
+SGReaderWriterBTG::acceptsExtension(const std::string& extension) const
+{
+    std::string lowercase_ext = osgDB::convertToLowerCase(extension);
+    if (lowercase_ext == "gz")
+        return true;
+    return osgDB::ReaderWriter::acceptsExtension(extension);
+}
+
 osgDB::ReaderWriter::ReadResult
 SGReaderWriterBTG::readNode(const std::string& fileName,
                             const osgDB::ReaderWriter::Options* options) const
diff --git a/simgear/scene/tgdb/SGReaderWriterBTG.hxx b/simgear/scene/tgdb/SGReaderWriterBTG.hxx
index ca5f4a73..a28ea7eb 100644
--- a/simgear/scene/tgdb/SGReaderWriterBTG.hxx
+++ b/simgear/scene/tgdb/SGReaderWriterBTG.hxx
@@ -28,6 +28,7 @@ public:
 
     virtual const char* className() const;
  
+    virtual bool acceptsExtension(const std::string& /*extension*/) const;
     virtual ReadResult readNode(const std::string& fileName,
                                 const osgDB::ReaderWriter::Options* options)
         const;
-- 
2.39.5