avoid pagerebuild when reloading a same save

Signed-off-by: Bret Curtis <psi29a@gmail.com>

apps/openmw/mwrender/objectpaging.cpp

@@ -339,6 +339,7 @@ namespace MWRender
     ObjectPaging::ObjectPaging(Resource::SceneManager* sceneManager)
             : GenericResourceManager<ChunkId>(nullptr)
          , mSceneManager(sceneManager)
+         , mRefTrackerLocked(false)
     {
         mActiveGrid = Settings::Manager::getBool("object paging active grid", "Terrain");
         mDebugBatches = Settings::Manager::getBool("object paging debug batches", "Terrain");
@@ -403,9 +404,9 @@ namespace MWRender
         }
 
         {
-            OpenThreads::ScopedLock<OpenThreads::Mutex> lock(mDisabledMutex);
+            OpenThreads::ScopedLock<OpenThreads::Mutex> lock(mRefTrackerMutex);
             if (activeGrid)
-                for (auto ref : mBlacklist)
+                for (auto ref : getRefTracker().mBlacklist)
                     refs.erase(ref);
         }
 
@@ -489,8 +490,8 @@ namespace MWRender
             }
 
             {
-                OpenThreads::ScopedLock<OpenThreads::Mutex> lock(mDisabledMutex);
+                OpenThreads::ScopedLock<OpenThreads::Mutex> lock(mRefTrackerMutex);
-                if (mDisabled.count(pair.first))
+                if (getRefTracker().mDisabled.count(pair.first))
                     continue;
             }
 
@@ -683,14 +684,16 @@ namespace MWRender
             return false;
 
         {
-            OpenThreads::ScopedLock<OpenThreads::Mutex> lock(mDisabledMutex);
+            OpenThreads::ScopedLock<OpenThreads::Mutex> lock(mRefTrackerMutex);
-            if (enabled && !mDisabled.erase(refnum)) return false;
+            if (enabled && !getWritableRefTracker().mDisabled.erase(refnum)) return false;
-            if (!enabled && !mDisabled.insert(refnum).second) return false;
+            if (!enabled && !getWritableRefTracker().mDisabled.insert(refnum).second) return false;
+            if (mRefTrackerLocked) return false;
         }
 
         ClearCacheFunctor ccf;
         ccf.mPosition = pos;
         mCache->call(ccf);
+        if (ccf.mToClear.empty()) return false;
         for (auto chunk : ccf.mToClear)
             mCache->removeFromObjectCache(chunk);
         return true;
@@ -702,8 +705,9 @@ namespace MWRender
             return false;
 
         {
-            OpenThreads::ScopedLock<OpenThreads::Mutex> lock(mDisabledMutex);
+            OpenThreads::ScopedLock<OpenThreads::Mutex> lock(mRefTrackerMutex);
-            if (!mBlacklist.insert(refnum).second) return false;
+            if (!getWritableRefTracker().mBlacklist.insert(refnum).second) return false;
+            if (mRefTrackerLocked) return false;
         }
 
         ClearCacheFunctor ccf;
@@ -719,12 +723,25 @@ namespace MWRender
 
     void ObjectPaging::clear()
     {
+        OpenThreads::ScopedLock<OpenThreads::Mutex> lock(mRefTrackerMutex);
+        mRefTrackerNew.mDisabled.clear();
+        mRefTrackerNew.mBlacklist.clear();
+        mRefTrackerLocked = true;
+    }
+
+    bool ObjectPaging::unlockCache()
     {
-            OpenThreads::ScopedLock<OpenThreads::Mutex> lock(mDisabledMutex);
+        if (!mRefTrackerLocked) return false;
-            mDisabled.clear();
+        {
-            mBlacklist.clear();
+            OpenThreads::ScopedLock<OpenThreads::Mutex> lock(mRefTrackerMutex);
+            mRefTrackerLocked = false;
+            if (mRefTracker == mRefTrackerNew)
+                return false;
+            else
+                mRefTracker = mRefTrackerNew;
         }
         mCache->clear();
+        return true;
     }
 
     struct GetRefnumsFunctor

apps/openmw/mwrender/objectpaging.hpp

@@ -41,6 +41,10 @@ namespace MWRender
 
         void clear();
 
+        /// Must be called after clear() before rendering starts.
+        /// @return true if view needs rebuild
+        bool unlockCache();
+
         void reportStats(unsigned int frameNumber, osg::Stats* stats) const override;
 
         void getPagedRefnums(const osg::Vec4i &activeGrid, std::set<ESM::RefNum> &out);
@@ -54,9 +58,19 @@ namespace MWRender
         float mMinSizeMergeFactor;
         float mMinSizeCostMultiplier;
 
-        OpenThreads::Mutex mDisabledMutex;
+        OpenThreads::Mutex mRefTrackerMutex;
+        struct RefTracker
+        {
             std::set<ESM::RefNum> mDisabled;
             std::set<ESM::RefNum> mBlacklist;
+            bool operator==(const RefTracker&other) { return mDisabled == other.mDisabled && mBlacklist == other.mBlacklist; }
+        };
+        RefTracker mRefTracker;
+        RefTracker mRefTrackerNew;
+        bool mRefTrackerLocked;
+
+        const RefTracker& getRefTracker() const { return mRefTracker; }
+        RefTracker& getWritableRefTracker() { return mRefTrackerLocked ? mRefTrackerNew : mRefTracker; }
 
         OpenThreads::Mutex mSizeCacheMutex;
         typedef std::map<ESM::RefNum, float> SizeCache;

apps/openmw/mwrender/renderingmanager.cpp

@@ -1511,6 +1511,15 @@ namespace MWRender
         if (mObjectPaging->blacklistObject(type, refnum, ptr.getCellRef().getPosition().asVec3()))
             mTerrain->rebuildViews();
     }
+    bool RenderingManager::pagingUnlockCache()
+    {
+        if (mObjectPaging && mObjectPaging->unlockCache())
+        {
+            mTerrain->rebuildViews();
+            return true;
+        }
+        return false;
+    }
     void RenderingManager::getPagedRefnums(const osg::Vec4i &activeGrid, std::set<ESM::RefNum> &out)
     {
         if (mObjectPaging)

apps/openmw/mwrender/renderingmanager.hpp

@@ -244,6 +244,7 @@ namespace MWRender
 
         bool pagingEnableObject(int type, const MWWorld::ConstPtr& ptr, bool enabled);
         void pagingBlacklistObject(int type, const MWWorld::ConstPtr &ptr);
+        bool pagingUnlockCache();
         void getPagedRefnums(const osg::Vec4i &activeGrid, std::set<ESM::RefNum> &out);
 
     private:

apps/openmw/mwworld/cellpreloader.cpp

@@ -419,36 +419,44 @@ namespace MWWorld
         mUnrefQueue = unrefQueue;
     }
 
-    bool CellPreloader::getTerrainPreloadInProgress(int& progress, int& progressRange, double timestamp)
+    bool CellPreloader::syncTerrainLoad(const std::vector<CellPreloader::PositionCellGrid> &positions, int& progress, int& progressRange, double timestamp)
     {
         if (!mTerrainPreloadItem)
-            return false;
+            return true;
         else if (mTerrainPreloadItem->isDone())
         {
-            mTerrainPreloadItem->storeViews(timestamp);
+            if (mTerrainPreloadItem->storeViews(timestamp))
+            {
                 mTerrainPreloadItem = nullptr;
+                return true;
+            }
+            else
+            {
+                setTerrainPreloadPositions(std::vector<CellPreloader::PositionCellGrid>());
+                setTerrainPreloadPositions(positions);
                 return false;
             }
+        }
         else
         {
             progress = mTerrainPreloadItem->getProgress();
             progressRange = mTerrainPreloadItem->getProgressRange();
-            return !progress || progress < progressRange;
+            return false;
         }
     }
 
-    void CellPreloader::abortTerrainPreloadExcept(const CellPreloader::PositionCellGrid& exceptPos)
+    void CellPreloader::abortTerrainPreloadExcept(const CellPreloader::PositionCellGrid *exceptPos)
-    {
-        if (mTerrainPreloadItem && !mTerrainPreloadItem->isDone())
     {
         const float resetThreshold = ESM::Land::REAL_SIZE;
         for (auto pos : mTerrainPreloadPositions)
-                if ((pos.first-exceptPos.first).length2() < resetThreshold*resetThreshold && pos.second == exceptPos.second)
+            if (exceptPos && (pos.first-exceptPos->first).length2() < resetThreshold*resetThreshold && pos.second == exceptPos->second)
                 return;
+        if (mTerrainPreloadItem && !mTerrainPreloadItem->isDone())
+        {
             mTerrainPreloadItem->abort();
             mTerrainPreloadItem->waitTillDone();
-            mTerrainPreloadItem = nullptr;
         }
+        setTerrainPreloadPositions(std::vector<CellPreloader::PositionCellGrid>());
     }
 
     bool contains(const std::vector<CellPreloader::PositionCellGrid>& container, const std::vector<CellPreloader::PositionCellGrid>& contained)

apps/openmw/mwworld/cellpreloader.hpp

@@ -72,8 +72,8 @@ namespace MWWorld
         typedef std::pair<osg::Vec3f, osg::Vec4i> PositionCellGrid;
         void setTerrainPreloadPositions(const std::vector<PositionCellGrid>& positions);
 
-        bool getTerrainPreloadInProgress(int& progress, int& progressRange, double timestamp);
+        bool syncTerrainLoad(const std::vector<CellPreloader::PositionCellGrid> &positions, int& progress, int& progressRange, double timestamp);
-        void abortTerrainPreloadExcept(const PositionCellGrid &exceptPos);
+        void abortTerrainPreloadExcept(const PositionCellGrid *exceptPos);
 
     private:
         Resource::ResourceSystem* mResourceSystem;

apps/openmw/mwworld/scene.cpp

@@ -510,13 +510,10 @@ namespace MWWorld
 
         osg::Vec2i newCell = getNewGridCenter(pos, &mCurrentGridCenter);
         if (newCell != mCurrentGridCenter)
-        {
+            changeCellGrid(pos, newCell.x(), newCell.y());
-            preloadTerrain(pos);
-            changeCellGrid(newCell.x(), newCell.y());
-        }
     }
 
-    void Scene::changeCellGrid (int playerCellX, int playerCellY, bool changeEvent)
+    void Scene::changeCellGrid (const osg::Vec3f &pos, int playerCellX, int playerCellY, bool changeEvent)
     {
         CellStoreCollection::iterator active = mActiveCells.begin();
         while (active!=mActiveCells.end())
@@ -538,8 +535,8 @@ namespace MWWorld
         osg::Vec4i newGrid = gridCenterToBounds(mCurrentGridCenter);
         mRendering.setActiveGrid(newGrid);
 
+        preloadTerrain(pos, true);
         mPagedRefs.clear();
-        checkTerrainLoaded();
         mRendering.getPagedRefnums(newGrid, mPagedRefs);
 
         std::size_t refsToLoad = 0;
@@ -867,9 +864,7 @@ namespace MWWorld
         if (changeEvent)
             MWBase::Environment::get().getWindowManager()->fadeScreenOut(0.5);
 
-        preloadTerrain(position.asVec3());
+        changeCellGrid(position.asVec3(), x, y, changeEvent);
-        checkTerrainLoaded();
-        changeCellGrid(x, y, changeEvent);
 
         CellStore* current = MWBase::Environment::get().getWorld()->getExterior(x, y);
         changePlayerCell(current, position, adjustPlayerPos);
@@ -878,29 +873,6 @@ namespace MWWorld
             MWBase::Environment::get().getWindowManager()->fadeScreenIn(0.5);
     }
 
-    void Scene::checkTerrainLoaded()
-    {
-        Loading::Listener* loadingListener = MWBase::Environment::get().getWindowManager()->getLoadingScreen();
-        Loading::ScopedLoad load(loadingListener);
-        int progress = 0, initialProgress = -1, progressRange = 0;
-        while (mPreloader->getTerrainPreloadInProgress(progress, progressRange, mRendering.getReferenceTime()))
-        {
-            if (initialProgress == -1)
-            {
-                loadingListener->setLabel("#{sLoadingMessage4}");
-                initialProgress = progress;
-            }
-            if (progress)
-            {
-                loadingListener->setProgressRange(std::max(0, progressRange-initialProgress));
-                loadingListener->setProgress(progress-initialProgress);
-            }
-            else
-                loadingListener->setProgress(0);
-            OpenThreads::Thread::microSleep(5000);
-        }
-    }
-
     CellStore* Scene::getCurrentCell ()
     {
         return mCurrentCell;
@@ -1145,12 +1117,36 @@ namespace MWWorld
             mPreloader->preload(cell, mRendering.getReferenceTime());
     }
 
-    void Scene::preloadTerrain(const osg::Vec3f &pos)
+    void Scene::preloadTerrain(const osg::Vec3f &pos, bool sync)
     {
         std::vector<PositionCellGrid> vec;
         vec.emplace_back(pos, gridCenterToBounds(getNewGridCenter(pos)));
-        mPreloader->abortTerrainPreloadExcept(vec[0]);
+        if (sync && mRendering.pagingUnlockCache())
+            mPreloader->abortTerrainPreloadExcept(nullptr);
+        else
+            mPreloader->abortTerrainPreloadExcept(&vec[0]);
         mPreloader->setTerrainPreloadPositions(vec);
+        if (!sync) return;
+
+        Loading::Listener* loadingListener = MWBase::Environment::get().getWindowManager()->getLoadingScreen();
+        Loading::ScopedLoad load(loadingListener);
+        int progress = 0, initialProgress = -1, progressRange = 0;
+        while (!mPreloader->syncTerrainLoad(vec, progress, progressRange, mRendering.getReferenceTime()))
+        {
+            if (initialProgress == -1)
+            {
+                loadingListener->setLabel("#{sLoadingMessage4}");
+                initialProgress = progress;
+            }
+            if (progress)
+            {
+                loadingListener->setProgressRange(std::max(0, progressRange-initialProgress));
+                loadingListener->setProgress(progress-initialProgress);
+            }
+            else
+                loadingListener->setProgress(0);
+            OpenThreads::Thread::microSleep(5000);
+        }
     }
 
     void Scene::reloadTerrain()

apps/openmw/mwworld/scene.hpp

@@ -93,7 +93,7 @@ namespace MWWorld
             osg::Vec2i mCurrentGridCenter;
 
             // Load and unload cells as necessary to create a cell grid with "X" and "Y" in the center
-            void changeCellGrid (int playerCellX, int playerCellY, bool changeEvent = true);
+            void changeCellGrid (const osg::Vec3f &pos, int playerCellX, int playerCellY, bool changeEvent = true);
 
             typedef std::pair<osg::Vec3f, osg::Vec4i> PositionCellGrid;
 
@@ -102,8 +102,6 @@ namespace MWWorld
             void preloadExteriorGrid(const osg::Vec3f& playerPos, const osg::Vec3f& predictedPos);
             void preloadFastTravelDestinations(const osg::Vec3f& playerPos, const osg::Vec3f& predictedPos, std::vector<PositionCellGrid>& exteriorPositions);
 
-            void checkTerrainLoaded();
-
             osg::Vec4i gridCenterToBounds(const osg::Vec2i &centerCell) const;
             osg::Vec2i getNewGridCenter(const osg::Vec3f &pos, const osg::Vec2i *currentGridCenter = nullptr) const;
 
@@ -115,7 +113,7 @@ namespace MWWorld
             ~Scene();
 
             void preloadCell(MWWorld::CellStore* cell, bool preloadSurrounding=false);
-            void preloadTerrain(const osg::Vec3f& pos);
+            void preloadTerrain(const osg::Vec3f& pos, bool sync=false);
             void reloadTerrain();
 
             void unloadCell (CellStoreCollection::iterator iter, bool test = false);