From b62cb0e2a47d5252d686ee2770ddc6fb6711a194 Mon Sep 17 00:00:00 2001
From: Kyle Cooley <kyleacooley@gmail.com>
Date: Sun, 20 Aug 2017 19:55:16 -0400
Subject: [PATCH] Clear out GPU texture/stateset cache

---
 components/resource/scenemanager.cpp | 16 ++++++++++++++++
 components/resource/scenemanager.hpp |  2 ++
 2 files changed, 18 insertions(+)

diff --git a/components/resource/scenemanager.cpp b/components/resource/scenemanager.cpp
index 226933760..2f04aa7c2 100644
--- a/components/resource/scenemanager.cpp
+++ b/components/resource/scenemanager.cpp
@@ -122,6 +122,13 @@ namespace Resource
         {
             return _sharedStateSetList.size();
         }
+
+        void clearCache()
+        {
+            OpenThreads::ScopedLock<OpenThreads::Mutex> lock(_listMutex);
+            _sharedTextureList.clear();
+            _sharedStateSetList.clear();
+        }
     };
 
     /// Set texture filtering settings on textures contained in a FlipController.
@@ -710,6 +717,15 @@ namespace Resource
         mSharedStateMutex.unlock();
     }
 
+    void SceneManager::clearCache()
+    {
+        ResourceManager::clearCache();
+
+        mSharedStateMutex.lock();
+        mSharedStateManager->clearCache();
+        mSharedStateMutex.unlock();
+    }
+
     void SceneManager::reportStats(unsigned int frameNumber, osg::Stats *stats) const
     {
         {
diff --git a/components/resource/scenemanager.hpp b/components/resource/scenemanager.hpp
index c6ff02acf..14032df77 100644
--- a/components/resource/scenemanager.hpp
+++ b/components/resource/scenemanager.hpp
@@ -143,6 +143,8 @@ namespace Resource
         /// @see ResourceManager::updateCache
         virtual void updateCache(double referenceTime);
 
+        virtual void clearCache();
+
         virtual void reportStats(unsigned int frameNumber, osg::Stats* stats) const;
 
     private: