Avoid calling RenderTarget::update from within loadResource

apps/openmw/mwgui/inventorywindow.cpp

@@ -504,6 +504,7 @@ namespace MWGui
 
     void InventoryWindow::doRenderUpdate ()
     {
+        mPreview->onFrame();
         if (mPreviewDirty)
         {
             mPreviewDirty = false;

apps/openmw/mwrender/characterpreview.cpp

@@ -37,6 +37,7 @@ namespace MWRender
         , mViewport(NULL)
         , mCamera(NULL)
         , mNode(NULL)
+        , mRecover(false)
     {
         mCharacter.mCell = NULL;
     }
@@ -46,6 +47,16 @@ namespace MWRender
 
     }
 
+    void CharacterPreview::onFrame()
+    {
+        if (mRecover)
+        {
+            setupRenderTarget();
+            mRenderTarget->update();
+            mRecover = false;
+        }
+    }
+
     void CharacterPreview::setup ()
     {
         mSceneMgr = Ogre::Root::getSingleton().createSceneManager(Ogre::ST_GENERIC);
@@ -127,9 +138,9 @@ namespace MWRender
 
         tex->createInternalResources();
 
-        setupRenderTarget();
-
-        mRenderTarget->update();
+        mRenderTarget = NULL;
+        mViewport = NULL;
+        mRecover = true;
     }
 
     void CharacterPreview::setupRenderTarget()
@@ -223,6 +234,10 @@ namespace MWRender
 
         mViewport->setDimensions (0, 0, std::min(1.f, float(mSizeX) / float(512)), std::min(1.f, float(mSizeY) / float(1024)));
         mTexture->load();
+
+        if (!mRenderTarget)
+            setupRenderTarget();
+
         mRenderTarget->update();
 
         mSelectionBuffer->update();

apps/openmw/mwrender/characterpreview.hpp

@@ -34,8 +34,13 @@ namespace MWRender
 
         virtual void rebuild();
 
+        void onFrame();
+
         void loadResource(Ogre::Resource *resource);
 
+    private:
+        bool mRecover; // Texture content was lost and needs to be re-rendered
+
     private:
         CharacterPreview(const CharacterPreview&);
         CharacterPreview& operator=(const CharacterPreview&);

libs/openengine/ogre/selectionbuffer.cpp

@@ -51,9 +51,9 @@ namespace Render
 
         tex->createInternalResources();
 
-        setupRenderTarget();
+        mRenderTarget = NULL;
 
-        mRenderTarget->update();
+        // Don't need to re-render texture, because we have a copy in system memory (mBuffer)
     }
 
     SelectionBuffer::~SelectionBuffer()
@@ -65,6 +65,9 @@ namespace Render
     {
         Ogre::MaterialManager::getSingleton ().addListener (this);
 
+        if (mRenderTarget == NULL)
+            setupRenderTarget();
+
         mRenderTarget->update();
 
         Ogre::MaterialManager::getSingleton ().removeListener (this);