Load special tilesets in ignored atlas.

Special tilesets for now is collision and levels.
After can be other.

6 files changed, 60 insertions, 0 deletions

diff --git a/src/defaults.cpp b/src/defaults.cpp
index bb6d7412e..f235d919e 100644
--- a/src/defaults.cpp
+++ b/src/defaults.cpp
@@ -639,6 +639,7 @@ DefaultsData* getPathsDefaults()
     AddDEF("gmCommandSymbol", "@");
     AddDEF("gmCharCommandSymbol", "#");
     AddDEF("linkCommandSymbol", "=");
+    AddDEF("emptyAtlasName", "ignored");
 
     AddDEF("palettesDir", "");
     AddDEF("defaultPaletteFile", "palette.gpl");
diff --git a/src/game.cpp b/src/game.cpp
index 9906b8cf1..e6da61255 100644
--- a/src/game.cpp
+++ b/src/game.cpp
@@ -419,6 +419,10 @@ Game::Game() :
     if (windowContainer)
         windowContainer->add(windowMenu);
 
+#ifdef USE_OPENGL
+    MapReader::loadEmptyAtlas();
+#endif
+
     initEngines();
 
     chatWindow->postConnection();
@@ -450,6 +454,10 @@ Game::Game() :
 
 Game::~Game()
 {
+#ifdef USE_OPENGL
+    MapReader::unloadEmptyAtlas();
+#endif
+
     settings.disableLoggingInGame = false;
     touchManager.setInGame(false);
     config.write();
diff --git a/src/resources/db/mapdb.cpp b/src/resources/db/mapdb.cpp
index 5e9f31cfc..48d234bb4 100644
--- a/src/resources/db/mapdb.cpp
+++ b/src/resources/db/mapdb.cpp
@@ -210,3 +210,15 @@ const MapInfo *MapDB::getMapAtlas(const std::string &name)
     info->files = &((*it2).second);
     return info;
 }
+
+const MapInfo *MapDB::getAtlas(const std::string &name)
+{
+    MapInfo *const info = new MapInfo;
+
+    const AtlasCIter it = mAtlases.find(name);
+    if (it == mAtlases.end())
+        return nullptr;
+    info->atlas = name;
+    info->files = &(*it).second;
+    return info;
+}
diff --git a/src/resources/db/mapdb.h b/src/resources/db/mapdb.h
index dfc0f1ca1..2a71de1ce 100644
--- a/src/resources/db/mapdb.h
+++ b/src/resources/db/mapdb.h
@@ -55,6 +55,8 @@ namespace MapDB
 
     const MapInfo *getMapAtlas(const std::string &name) A_WARN_UNUSED;
 
+    const MapInfo *getAtlas(const std::string &name) A_WARN_UNUSED;
+
     // Maps DB
     typedef std::map<std::string, std::string> Maps;
     typedef Maps::iterator MapIterator;
diff --git a/src/resources/mapreader.cpp b/src/resources/mapreader.cpp
index 67ce2f465..8c45cfc3c 100644
--- a/src/resources/mapreader.cpp
+++ b/src/resources/mapreader.cpp
@@ -64,6 +64,10 @@
 typedef std::map<std::string, XmlNodePtr>::iterator LayerInfoIterator;
 typedef std::set<XML::Document*>::iterator DocIterator;
 
+#ifdef USE_OPENGL
+Resource *MapReader::mEmptyAtlas = nullptr;
+#endif  // USE_OPENGL
+
 namespace
 {
     std::map<std::string, XmlNodePtr> mKnownLayers;
@@ -1235,3 +1239,26 @@ void MapReader::updateMusic(Map *const map)
     if (PhysFs::exists(paths.getStringValue("music").append(name).c_str()))
         map->setProperty("music", name);
 }
+
+#ifdef USE_OPENGL
+void MapReader::loadEmptyAtlas()
+{
+    if (!graphicsManager.getUseAtlases())
+        return;
+
+    const MapInfo *const info = MapDB::getAtlas(
+        paths.getStringValue("emptyAtlasName"));
+    if (info)
+    {
+        mEmptyAtlas = Loader::getAtlas(
+            info->atlas,
+            *info->files);
+    }
+}
+
+void MapReader::unloadEmptyAtlas()
+{
+    if (mEmptyAtlas)
+        mEmptyAtlas->decRef();
+}
+#endif  // USE_OPENGL
diff --git a/src/resources/mapreader.h b/src/resources/mapreader.h
index 37b511d03..48a9edd0c 100644
--- a/src/resources/mapreader.h
+++ b/src/resources/mapreader.h
@@ -30,6 +30,7 @@
 class Map;
 class MapHeights;
 class Properties;
+class Resource;
 class Tileset;
 
 /**
@@ -62,6 +63,11 @@ class MapReader final
         static void readLayer(const XmlNodePtr node,
                               Map *const map) A_NONNULL(2);
 
+#ifdef USE_OPENGL
+        static void loadEmptyAtlas();
+        static void unloadEmptyAtlas();
+#endif  // USE_OPENGL
+
     private:
         /**
          * Reads the properties element.
@@ -105,6 +111,10 @@ class MapReader final
         static void loadLayers(const std::string &path);
 
         static void unloadTempLayers();
+
+#ifdef USE_OPENGL
+        static Resource *mEmptyAtlas;
+#endif  // USE_OPENGL
 };
 
 #endif  // RESOURCES_MAPREADER_H