Changed the tolower of the file extension into the plugin name construction code.

Added support for CompositeLayer.

src/osgDB/Registry.cpp

@@ -30,6 +30,15 @@
 #include <algorithm>
 #include <set>
 
+#if defined(__sgi)
+    #include <ctype.h>
+#elif defined(__GNUC__) || !defined(WIN32) || defined(__MWERKS__)
+    #include <cctype>
+    using std::tolower;
+    using std::strlen;    
+#endif
+
+
 using namespace osg;
 using namespace osgDB;
 
@@ -545,14 +554,20 @@ std::string Registry::trim( const std::string& str )
 
 std::string Registry::createLibraryNameForFile(const std::string& fileName)
 {
-    std::string ext = getLowerCaseFileExtension(fileName);
-    return createLibraryNameForExtension(ext);
+    return createLibraryNameForExtension(getFileExtension(fileName));
 }
 
 std::string Registry::createLibraryNameForExtension(const std::string& ext)
 {
+    std::string lowercase_ext;
+    for(std::string::const_iterator itr=ext.begin();
+        itr!=ext.end();
+        ++itr)
+    {
+        lowercase_ext.push_back(tolower(*itr));
+    }
 
-    ExtensionAliasMap::iterator itr=_extAliasMap.find(ext);
+    ExtensionAliasMap::iterator itr=_extAliasMap.find(lowercase_ext);
     if (itr!=_extAliasMap.end() && ext != itr->second) return createLibraryNameForExtension(itr->second);
 
 #ifdef OSG_JAVA_BUILD
@@ -569,23 +584,23 @@ std::string Registry::createLibraryNameForExtension(const std::string& ext)
 #if defined(WIN32)
     // !! recheck evolving Cygwin DLL extension naming protocols !! NHV
     #ifdef __CYGWIN__
-        return "cyg"+prepend+"osgdb_"+ext+".dll";
+        return "cyg"+prepend+"osgdb_"+lowercase_ext+".dll";
     #elif defined(__MINGW32__)
-        return "lib"+prepend+"osgdb_"+ext+".dll";
+        return "lib"+prepend+"osgdb_"+lowercase_ext+".dll";
     #else
         #ifdef _DEBUG
-            return prepend+"osgdb_"+ext+"d.dll";
+            return prepend+"osgdb_"+lowercase_ext+"d.dll";
         #else
-            return prepend+"osgdb_"+ext+".dll";
+            return prepend+"osgdb_"+lowercase_ext+".dll";
         #endif
     #endif
 #elif macintosh
-    return prepend+"osgdb_"+ext;
+    return prepend+"osgdb_"+lowercase_ext;
 #elif defined(__hpux__)
     // why don't we use PLUGIN_EXT from the makefiles here?
-    return prepend+"osgdb_"+ext+".sl";
+    return prepend+"osgdb_"+lowercase_ext+".sl";
 #else
-    return prepend+"osgdb_"+ext+".so";
+    return prepend+"osgdb_"+lowercase_ext+".so";
 #endif
 
 }

src/osgPlugins/osgTerrain/Terrain.cpp

@@ -38,6 +38,27 @@ osgTerrain::Layer* readLayer(osgDB::Input& fr)
     while (!fr.eof() && fr[0].getNoNestedBrackets()>entry)
     {
         bool itrAdvanced = false;
+        
+        if (fr.matchSequence("Images {") || fr.matchSequence("images {"))
+        {
+            osg::ref_ptr<osgTerrain::CompositeLayer> cl = new osgTerrain::CompositeLayer;
+            
+            int local_entry = fr[0].getNoNestedBrackets();
+
+            fr += 2;
+            while (!fr.eof() && fr[0].getNoNestedBrackets()>local_entry)
+            {
+                cl->addLayer(fr[0].getStr());
+                ++fr;
+            }
+            
+            layer = cl.get();
+        
+            itrAdvanced = true;
+            
+            ++fr;
+        }
+
         if (fr.matchSequence("Image %w") || fr.matchSequence("image %w") || 
             fr.matchSequence("Image %s") || fr.matchSequence("image %s"))
         {

src/osgTerrain/Layer.cpp

@@ -20,8 +20,9 @@ Layer::Layer()
 {
 }
 
-Layer::Layer(const Layer& Layer,const osg::CopyOp& copyop):
-    osg::Object(Layer,copyop)
+Layer::Layer(const Layer& layer,const osg::CopyOp& copyop):
+    osg::Object(layer,copyop),
+    _filename(layer._filename)
 {
 }
 
@@ -321,3 +322,19 @@ unsigned int HeightFieldLayer::getModifiedCount() const
 {
     return _modifiedCount;
 }
+
+
+/////////////////////////////////////////////////////////////////////////////
+//
+// HieghtFieldLayer
+//
+CompositeLayer::CompositeLayer()
+{
+}
+
+CompositeLayer::CompositeLayer(const CompositeLayer& compositeLayer,const osg::CopyOp& copyop):
+    Layer(compositeLayer,copyop)
+{
+}
+
+