From 809168d5f8d907bace2a555624ccc302c64ab7f9 Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Wed, 9 Jul 2003 19:48:04 +0000
Subject: [PATCH] Further updates to the DatabasePager.

---
 include/osgProducer/DatabasePager | 16 +++++++--
 src/osgProducer/DatabasePager.cpp | 57 +++++++++++++++++++++++++++++--
 2 files changed, 68 insertions(+), 5 deletions(-)

diff --git a/include/osgProducer/DatabasePager b/include/osgProducer/DatabasePager
index eec0a194a..4d4f95612 100644
--- a/include/osgProducer/DatabasePager
+++ b/include/osgProducer/DatabasePager
@@ -17,12 +17,15 @@
 #include <osg/NodeVisitor>
 #include <osg/Group>
 #include <osg/PagedLOD>
+#include <osg/Drawable>
 
 #include <Producer/Thread>
 #include <Producer/Mutex>
 
 #include <osgProducer/Export>
 
+#include <map>
+
 namespace osgProducer {
 
 /** Database paging class which manages the loading of files in a background thread, 
@@ -80,16 +83,21 @@ class OSGPRODUCER_EXPORT DatabasePager : public osg::NodeVisitor::DatabaseReques
           * note, should only be called from the draw thread.*/
         void compileRenderingObjects(osg::State& state);
 
-    public:
-
-        typedef std::vector< osg::ref_ptr<osg::PagedLOD> > PagedLODList;
 
     protected :
 
         virtual ~DatabasePager() {}
         
+        // make friends with helper classes defined in DatabasePager.cpp.
+        class FindRenderingObjectsVisitor;
+        class FindPagedLODsVisitor;
+
+        typedef std::vector< osg::ref_ptr<osg::PagedLOD> > PagedLODList;
+
         typedef std::vector< osg::ref_ptr<osg::StateSet> > StateSetList;
         typedef std::vector< osg::ref_ptr<osg::Drawable> > DrawableList;
+        typedef std::pair<StateSetList,DrawableList>       DataToCompile;
+        typedef std::map< unsigned int, DataToCompile >    DataToCompileMap; 
 
         struct DatabaseRequest : public osg::Referenced
         {
@@ -101,6 +109,8 @@ class OSGPRODUCER_EXPORT DatabasePager : public osg::NodeVisitor::DatabaseReques
             unsigned int                _numOfRequests;
             osg::ref_ptr<osg::Group>    _groupForAddingLoadedSubgraph;
             osg::ref_ptr<osg::Node>     _loadedModel;
+            DataToCompileMap            _dataToCompileMap;
+            
         };
         
         typedef std::vector< osg::ref_ptr<DatabaseRequest> > DatabaseRequestList;
diff --git a/src/osgProducer/DatabasePager.cpp b/src/osgProducer/DatabasePager.cpp
index 61cd220a3..ce8e8e159 100644
--- a/src/osgProducer/DatabasePager.cpp
+++ b/src/osgProducer/DatabasePager.cpp
@@ -1,7 +1,10 @@
 #include <osgProducer/DatabasePager>
 #include <osgDB/ReadFile>
+#include <osg/Geode>
 
-#ifndef WIN32
+#ifdef WIN32
+#include <windows.h>
+#else
 #include <unistd.h>
 #endif
 
@@ -77,6 +80,56 @@ void DatabasePager::requestNodeFile(const std::string& fileName,osg::Group* grou
     }
 }
 
+class DatabasePager::FindRenderingObjectsVisitor : public osg::NodeVisitor
+{
+public:
+    FindRenderingObjectsVisitor(DatabasePager::DataToCompile& dataToCompile):
+        osg::NodeVisitor(osg::NodeVisitor::TRAVERSE_ALL_CHILDREN),
+        _dataToCompile(dataToCompile)
+    {
+    }
+    
+    virtual void apply(osg::Node& node)
+    {
+        apply(node.getStateSet());
+
+        traverse(node);
+    }
+    
+    virtual void apply(osg::Geode& geode)
+    {
+        apply(geode.getStateSet());
+    
+        for(unsigned int i=0;i<geode.getNumDrawables();++i)
+        {
+            apply(geode.getDrawable(i));
+        }
+
+        traverse(geode);
+    }
+    
+    inline void apply(osg::StateSet* stateset)
+    {
+        if (stateset)
+        {
+            _dataToCompile.first.push_back(stateset);
+        }
+    }
+    
+    inline void apply(osg::Drawable* drawable)
+    {
+        apply(drawable->getStateSet());
+
+        if (drawable->getUseDisplayList() || drawable->getUseVertexBufferObjects())
+        {
+            _dataToCompile.second.push_back(drawable);
+        }
+    }
+    
+    DatabasePager::DataToCompile& _dataToCompile;
+};
+
+
 void DatabasePager::run()
 {
     std::cout<<"DatabasePager::run()"<<std::endl;
@@ -206,7 +259,7 @@ void DatabasePager::removeExpiredSubgraphs(double currentFrameTime)
 }
 
 
-class FindPagedLODsVisitor : public osg::NodeVisitor
+class DatabasePager::FindPagedLODsVisitor : public osg::NodeVisitor
 {
 public:
     FindPagedLODsVisitor(DatabasePager::PagedLODList& pagedLODList):