Fix code style, ignore some warning in clang-tidy

40 files changed, 74 insertions, 74 deletions

diff --git a/src/game.cpp b/src/game.cpp
index de070c7f9..e747bf6bb 100644
--- a/src/game.cpp
+++ b/src/game.cpp
@@ -175,7 +175,7 @@ static void initEngines()
 
     particleEngine = new ParticleEngine;
     particleEngine->setMap(nullptr);
-    particleEngine->setupEngine();
+    ParticleEngine::setupEngine();
     BeingInfo::init();
 
     if (gameHandler != nullptr)
diff --git a/src/gui/widgets/spellshortcutcontainer.cpp b/src/gui/widgets/spellshortcutcontainer.cpp
index dfe7c99af..88d3d26ef 100644
--- a/src/gui/widgets/spellshortcutcontainer.cpp
+++ b/src/gui/widgets/spellshortcutcontainer.cpp
@@ -47,7 +47,7 @@ SpellShortcutContainer::SpellShortcutContainer(Widget2 *const widget,
     mSpellClicked(false)
 {
     if (spellShortcut != nullptr)
-        mMaxItems = spellShortcut->getSpellsCount();
+        mMaxItems = SpellShortcut::getSpellsCount();
     else
         mMaxItems = 0;
 }
diff --git a/src/gui/widgets/tabs/chat/emulateguildtab.cpp b/src/gui/widgets/tabs/chat/emulateguildtab.cpp
index 88bff63c6..16b3e2c2e 100644
--- a/src/gui/widgets/tabs/chat/emulateguildtab.cpp
+++ b/src/gui/widgets/tabs/chat/emulateguildtab.cpp
@@ -82,7 +82,7 @@ void EmulateGuildTab::getAutoCompleteList(StringVect &names) const
     if (guildManager == nullptr)
         return;
 
-    guildManager->getNames(names);
+    GuildManager::getNames(names);
 }
 
 void EmulateGuildTab::getAutoCompleteCommands(StringVect &names) const
diff --git a/src/gui/windows/chatwindow.cpp b/src/gui/windows/chatwindow.cpp
index 0f0970c51..f96cf976d 100644
--- a/src/gui/windows/chatwindow.cpp
+++ b/src/gui/windows/chatwindow.cpp
@@ -253,7 +253,7 @@ void ChatWindow::loadCommandsFile(const std::string &name)
 void ChatWindow::fillCommands()
 {
     loadCommandsFile("chatcommands.txt");
-    inputManager.addChatCommands(mCommands);
+    InputManager::addChatCommands(mCommands);
 }
 
 void ChatWindow::loadGMCommands()
@@ -1531,7 +1531,7 @@ std::string ChatWindow::autoComplete(const StringVect &names,
 }
 
 std::string ChatWindow::autoComplete(const std::string &partName,
-                                     const History *const words) const
+                                     const History *const words)
 {
     if (words == nullptr)
         return "";
diff --git a/src/gui/windows/chatwindow.h b/src/gui/windows/chatwindow.h
index 8e3a3cec0..f40690c3d 100644
--- a/src/gui/windows/chatwindow.h
+++ b/src/gui/windows/chatwindow.h
@@ -330,8 +330,8 @@ class ChatWindow final : public Window,
 
         std::string autoCompleteHistory(const std::string &partName) const;
 
-        std::string autoComplete(const std::string &partName,
-                                 const History *const words) const;
+        static std::string autoComplete(const std::string &partName,
+                                        const History *const words);
 
         static std::string autoComplete(const StringVect &names,
                                         std::string partName);
diff --git a/src/net/eathena/mail2recv.cpp b/src/net/eathena/mail2recv.cpp
index 9af91a754..94f3bb82d 100644
--- a/src/net/eathena/mail2recv.cpp
+++ b/src/net/eathena/mail2recv.cpp
@@ -276,7 +276,7 @@ void Mail2Recv::processCheckNameResult(Net::MessageIn &msg)
             }
             else
             {
-                mailWindow->createMail(mail->to);
+                MailWindow::createMail(mail->to);
             }
             break;
         case MailQueueType::ValidateTo:
diff --git a/src/net/tmwa/guildmanager.cpp b/src/net/tmwa/guildmanager.cpp
index c0834a6bd..a845bbb2e 100644
--- a/src/net/tmwa/guildmanager.cpp
+++ b/src/net/tmwa/guildmanager.cpp
@@ -129,7 +129,7 @@ void GuildManager::chat(const std::string &msg)
     mTab->chatLog(localPlayer->getName(), msg);
 }
 
-void GuildManager::getNames(StringVect &names) const
+void GuildManager::getNames(StringVect &names)
 {
     const Guild *const guild = createGuild();
     if (guild != nullptr)
@@ -240,7 +240,7 @@ void GuildManager::createTab(Guild *const guild)
     }
 }
 
-Guild *GuildManager::createGuild() const
+Guild *GuildManager::createGuild()
 {
     Guild *const guild = Guild::getGuild(1);
     if (guild == nullptr)
diff --git a/src/net/tmwa/guildmanager.h b/src/net/tmwa/guildmanager.h
index 1a089d342..7c5a8fd32 100644
--- a/src/net/tmwa/guildmanager.h
+++ b/src/net/tmwa/guildmanager.h
@@ -46,7 +46,7 @@ class GuildManager final
 
         static void send(const std::string &msg);
 
-        void getNames(StringVect &names) const;
+        static void getNames(StringVect &names);
 
         void requestGuildInfo();
 
@@ -65,7 +65,7 @@ class GuildManager final
 
         void createTab(Guild *const guild);
 
-        Guild *createGuild() const A_WARN_UNUSED;
+        static Guild *createGuild() A_WARN_UNUSED;
 
         static void clear();
 
diff --git a/src/progs/dyecmd/dyemain.cpp b/src/progs/dyecmd/dyemain.cpp
index b4ff54af5..bc2a72cf9 100644
--- a/src/progs/dyecmd/dyemain.cpp
+++ b/src/progs/dyecmd/dyemain.cpp
@@ -87,7 +87,7 @@ int main(int argc, char **argv)
     Cpu::detect();
     DyePalette::initFunctions();
 
-    graphicsManager.createWindow(10, 10, 0, SDL_ANYFORMAT);
+    GraphicsManager::createWindow(10, 10, 0, SDL_ANYFORMAT);
 
 #ifdef USE_SDL2
     imageHelper = new SurfaceImageHelper;
diff --git a/src/progs/manaplus/actions/actions.cpp b/src/progs/manaplus/actions/actions.cpp
index 2993904ce..1a351d268 100644
--- a/src/progs/manaplus/actions/actions.cpp
+++ b/src/progs/manaplus/actions/actions.cpp
@@ -2004,9 +2004,9 @@ impHandler(seen)
 impHandler(dumpMemoryUsage)
 {
     if (event.tab != nullptr)
-        memoryManager.printAllMemory(event.tab);
+        MemoryManager::printAllMemory(event.tab);
     else
-        memoryManager.printAllMemory(localChatTab);
+        MemoryManager::printAllMemory(localChatTab);
     return true;
 }
 
diff --git a/src/progs/manaplus/actions/chat.cpp b/src/progs/manaplus/actions/chat.cpp
index ce63419cf..22d0656cb 100644
--- a/src/progs/manaplus/actions/chat.cpp
+++ b/src/progs/manaplus/actions/chat.cpp
@@ -779,7 +779,7 @@ impHandler(sendGuiKey)
     }
     if (sz == 2)
     {
-        const InputActionT actionId = inputManager.getActionByConfigField(
+        const InputActionT actionId = InputManager::getActionByConfigField(
             pars[1]);
         guiInput->simulateKey(keyValue, actionId);
     }
diff --git a/src/progs/manaplus/actions/commands.cpp b/src/progs/manaplus/actions/commands.cpp
index ba4ae0d61..dd58c221b 100644
--- a/src/progs/manaplus/actions/commands.cpp
+++ b/src/progs/manaplus/actions/commands.cpp
@@ -1670,7 +1670,7 @@ impHandler(mailTo)
     }
     else
     {
-        mailWindow->createMail(args);
+        MailWindow::createMail(args);
     }
     return true;
 }
diff --git a/src/render/graphics.cpp b/src/render/graphics.cpp
index 7bbb75822..cd88c25dd 100644
--- a/src/render/graphics.cpp
+++ b/src/render/graphics.cpp
@@ -283,7 +283,7 @@ bool Graphics::setOpenGLMode() restrict2
 {
 #ifdef USE_OPENGL
     SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
-    if ((mWindow = graphicsManager.createWindow(
+    if ((mWindow = GraphicsManager::createWindow(
         mActualWidth, mActualHeight,
         mBpp, getOpenGLFlags())) == nullptr)
     {
diff --git a/src/render/sdl2graphics.cpp b/src/render/sdl2graphics.cpp
index bd94b2380..36c757005 100644
--- a/src/render/sdl2graphics.cpp
+++ b/src/render/sdl2graphics.cpp
@@ -752,7 +752,7 @@ bool SDLGraphics::setVideoMode(const int w, const int h,
         noFrame,
         allowHighDPI);
 
-    if (!(mWindow = graphicsManager.createWindow(w, h, bpp,
+    if (!(mWindow = GraphicsManager::createWindow(w, h, bpp,
         getSoftwareFlags())))
     {
         mRect.w = 0;
diff --git a/src/render/sdl2softwaregraphics.cpp b/src/render/sdl2softwaregraphics.cpp
index 38e1604b4..8eb0519f5 100644
--- a/src/render/sdl2softwaregraphics.cpp
+++ b/src/render/sdl2softwaregraphics.cpp
@@ -1477,7 +1477,7 @@ bool SDL2SoftwareGraphics::setVideoMode(const int w, const int h,
         noFrame,
         allowHighDPI);
 
-    if (!(mWindow = graphicsManager.createWindow(w, h, bpp,
+    if (!(mWindow = GraphicsManager::createWindow(w, h, bpp,
         getSoftwareFlags())))
     {
         mRect.w = 0;
diff --git a/src/render/sdlgraphics.cpp b/src/render/sdlgraphics.cpp
index 118e154da..c165be7db 100644
--- a/src/render/sdlgraphics.cpp
+++ b/src/render/sdlgraphics.cpp
@@ -1489,7 +1489,7 @@ bool SDLGraphics::setVideoMode(const int w, const int h,
         noFrame,
         allowHighDPI);
 
-    if ((mWindow = graphicsManager.createWindow(w, h, bpp,
+    if ((mWindow = GraphicsManager::createWindow(w, h, bpp,
         getSoftwareFlags())) == nullptr)
     {
         mRect.w = 0;
diff --git a/src/resources/image/image.cpp b/src/resources/image/image.cpp
index 967fc17b8..171e035de 100644
--- a/src/resources/image/image.cpp
+++ b/src/resources/image/image.cpp
@@ -513,7 +513,7 @@ int Image::calcMemoryLocal() const
     if (mSDLSurface != nullptr)
     {
         sz += CAST_S32(mAlphaCache.size()) *
-            memoryManager.getSurfaceSize(mSDLSurface);
+            MemoryManager::getSurfaceSize(mSDLSurface);
     }
     return sz;
 }
diff --git a/src/resources/memorycounter.cpp b/src/resources/memorycounter.cpp
index 826dcf3e2..13b742c8c 100644
--- a/src/resources/memorycounter.cpp
+++ b/src/resources/memorycounter.cpp
@@ -37,7 +37,7 @@ int MemoryCounter::calcMemory(const int level) const
 {
     const int sumLocal = calcMemoryLocal();
     const int sumChilds = calcMemoryChilds(level);
-    memoryManager.printMemory(getCounterName(),
+    MemoryManager::printMemory(getCounterName(),
         level,
         sumLocal,
         sumChilds);
diff --git a/src/resources/resourcemanager/resourcemanager.cpp b/src/resources/resourcemanager/resourcemanager.cpp
index 0764fe94f..74d079541 100644
--- a/src/resources/resourcemanager/resourcemanager.cpp
+++ b/src/resources/resourcemanager/resourcemanager.cpp
@@ -652,7 +652,7 @@ int calcMemoryLocal()
     int sz = 24;
     FOR_EACH (std::set<SDL_Surface*>::iterator, it, deletedSurfaces)
     {
-        sz += memoryManager.getSurfaceSize(*it);
+        sz += MemoryManager::getSurfaceSize(*it);
     }
     return sz;
 }
@@ -681,7 +681,7 @@ int calcMemory(const int level)
 {
     const int sumLocal = calcMemoryLocal();
     const int sumChilds = calcMemoryChilds(0);
-    memoryManager.printMemory("resource manager",
+    MemoryManager::printMemory("resource manager",
         level,
         sumLocal,
         sumChilds);
diff --git a/src/unittests/gui/widgets/browserbox.cc b/src/unittests/gui/widgets/browserbox.cc
index 009474031..737cf547c 100644
--- a/src/unittests/gui/widgets/browserbox.cc
+++ b/src/unittests/gui/widgets/browserbox.cc
@@ -65,11 +65,11 @@ TEST_CASE("BrowserBox tests", "browserbox")
 
 #ifdef USE_SDL2
     SDLImageHelper::setRenderer(graphicsManager.createRenderer(
-        graphicsManager.createWindow(640, 480, 0,
+        GraphicsManager::createWindow(640, 480, 0,
         SDL_WINDOW_SHOWN | SDL_SWSURFACE), SDL_RENDERER_SOFTWARE));
 #else  // USE_SDL2
 
-    graphicsManager.createWindow(640, 480, 0, SDL_ANYFORMAT | SDL_SWSURFACE);
+    GraphicsManager::createWindow(640, 480, 0, SDL_ANYFORMAT | SDL_SWSURFACE);
 #endif  // USE_SDL2
 
     theme = new Theme;
diff --git a/src/unittests/gui/widgets/staticbrowserbox.cc b/src/unittests/gui/widgets/staticbrowserbox.cc
index 0c429e19c..4efd3f87c 100644
--- a/src/unittests/gui/widgets/staticbrowserbox.cc
+++ b/src/unittests/gui/widgets/staticbrowserbox.cc
@@ -65,11 +65,11 @@ TEST_CASE("StaticBrowserBox tests", "browserbox")
 
 #ifdef USE_SDL2
     SDLImageHelper::setRenderer(graphicsManager.createRenderer(
-        graphicsManager.createWindow(640, 480, 0,
+        GraphicsManager::createWindow(640, 480, 0,
         SDL_WINDOW_SHOWN | SDL_SWSURFACE), SDL_RENDERER_SOFTWARE));
 #else  // USE_SDL2
 
-    graphicsManager.createWindow(640, 480, 0, SDL_ANYFORMAT | SDL_SWSURFACE);
+    GraphicsManager::createWindow(640, 480, 0, SDL_ANYFORMAT | SDL_SWSURFACE);
 #endif  // USE_SDL2
 
     theme = new Theme;
diff --git a/src/unittests/gui/windowmanager.cc b/src/unittests/gui/windowmanager.cc
index a504e6f41..166ef964f 100644
--- a/src/unittests/gui/windowmanager.cc
+++ b/src/unittests/gui/windowmanager.cc
@@ -175,11 +175,11 @@ TEST_CASE("Windows tests", "windowmanager")
 
 #ifdef USE_SDL2
     SDLImageHelper::setRenderer(graphicsManager.createRenderer(
-        graphicsManager.createWindow(640, 480, 0,
+        GraphicsManager::createWindow(640, 480, 0,
         SDL_WINDOW_SHOWN | SDL_SWSURFACE), SDL_RENDERER_SOFTWARE));
 #else  // USE_SDL2
 
-    graphicsManager.createWindow(640, 480, 0, SDL_ANYFORMAT | SDL_SWSURFACE);
+    GraphicsManager::createWindow(640, 480, 0, SDL_ANYFORMAT | SDL_SWSURFACE);
 #endif  // USE_SDL2
 
     userPalette = new UserPalette;
@@ -882,11 +882,11 @@ TEST_CASE("WindowManager", "create windows")
 
 #ifdef USE_SDL2
     SDLImageHelper::setRenderer(graphicsManager.createRenderer(
-        graphicsManager.createWindow(640, 480, 0,
+        GraphicsManager::createWindow(640, 480, 0,
         SDL_WINDOW_SHOWN | SDL_SWSURFACE), SDL_RENDERER_SOFTWARE));
 #else  // USE_SDL2
 
-    graphicsManager.createWindow(640, 480, 0, SDL_ANYFORMAT | SDL_SWSURFACE);
+    GraphicsManager::createWindow(640, 480, 0, SDL_ANYFORMAT | SDL_SWSURFACE);
 #endif  // USE_SDL2
 
     config.setValue("fontSize", 16);
diff --git a/src/unittests/integrity.cc b/src/unittests/integrity.cc
index a77bd40f9..3d370b36d 100644
--- a/src/unittests/integrity.cc
+++ b/src/unittests/integrity.cc
@@ -132,13 +132,13 @@ TEST_CASE("integrity tests", "integrity")
     imageHelper = new SurfaceImageHelper;
 
     SDLImageHelper::setRenderer(graphicsManager.createRenderer(
-        graphicsManager.createWindow(640, 480, 0,
+        GraphicsManager::createWindow(640, 480, 0,
         SDL_WINDOW_SHOWN | SDL_SWSURFACE), SDL_RENDERER_SOFTWARE));
 #else  // USE_SDL2
 
     imageHelper = new SDLImageHelper();
 
-    graphicsManager.createWindow(640, 480, 0, SDL_ANYFORMAT | SDL_SWSURFACE);
+    GraphicsManager::createWindow(640, 480, 0, SDL_ANYFORMAT | SDL_SWSURFACE);
 #endif  // USE_SDL2
 
     userPalette = new UserPalette;
diff --git a/src/unittests/render/mockgraphics.cc b/src/unittests/render/mockgraphics.cc
index c33953186..d2ba71f0a 100644
--- a/src/unittests/render/mockgraphics.cc
+++ b/src/unittests/render/mockgraphics.cc
@@ -268,7 +268,7 @@ bool MockGraphics::setVideoMode(const int w, const int h,
 {
     setMainFlags(w, h, scale, bpp, fs, hwaccel, resize, noFrame, allowHighDPI);
 
-    if ((mWindow = graphicsManager.createWindow(w, h, bpp,
+    if ((mWindow = GraphicsManager::createWindow(w, h, bpp,
         getSoftwareFlags())) == nullptr)
     {
         mRect.w = 0;
diff --git a/src/unittests/resources/dye/dye.cc b/src/unittests/resources/dye/dye.cc
index 97eecc2cd..52613cd60 100644
--- a/src/unittests/resources/dye/dye.cc
+++ b/src/unittests/resources/dye/dye.cc
@@ -1973,13 +1973,13 @@ TEST_CASE("Dye real dye", "")
     imageHelper = new SurfaceImageHelper;
 
     SDLImageHelper::setRenderer(graphicsManager.createRenderer(
-        graphicsManager.createWindow(640, 480, 0,
+        GraphicsManager::createWindow(640, 480, 0,
         SDL_WINDOW_SHOWN | SDL_SWSURFACE), SDL_RENDERER_SOFTWARE));
 #else  // USE_SDL2
 
     imageHelper = new SDLImageHelper;
 
-    graphicsManager.createWindow(640, 480, 0, SDL_ANYFORMAT | SDL_SWSURFACE);
+    GraphicsManager::createWindow(640, 480, 0, SDL_ANYFORMAT | SDL_SWSURFACE);
 #endif  // USE_SDL2
 
     userPalette = new UserPalette;
diff --git a/src/unittests/resources/dye/dyepalette.cc b/src/unittests/resources/dye/dyepalette.cc
index a2a17225c..6318977bc 100644
--- a/src/unittests/resources/dye/dyepalette.cc
+++ b/src/unittests/resources/dye/dyepalette.cc
@@ -77,11 +77,11 @@ TEST_CASE("DyePalette tests", "")
 
 #ifdef USE_SDL2
     SDLImageHelper::setRenderer(graphicsManager.createRenderer(
-        graphicsManager.createWindow(640, 480, 0,
+        GraphicsManager::createWindow(640, 480, 0,
         SDL_WINDOW_SHOWN | SDL_SWSURFACE), SDL_RENDERER_SOFTWARE));
 #else  // USE_SDL2
 
-    graphicsManager.createWindow(640, 480, 0, SDL_ANYFORMAT | SDL_SWSURFACE);
+    GraphicsManager::createWindow(640, 480, 0, SDL_ANYFORMAT | SDL_SWSURFACE);
 #endif  // USE_SDL2
 
     theme = new Theme;
diff --git a/src/unittests/resources/map/maplayer/drawfringenormal.cc b/src/unittests/resources/map/maplayer/drawfringenormal.cc
index 65e20812f..6f68d77e7 100644
--- a/src/unittests/resources/map/maplayer/drawfringenormal.cc
+++ b/src/unittests/resources/map/maplayer/drawfringenormal.cc
@@ -67,11 +67,11 @@ TEST_CASE("MapLayer drawFringe normal", "")
 
 #ifdef USE_SDL2
     SDLImageHelper::setRenderer(graphicsManager.createRenderer(
-        graphicsManager.createWindow(640, 480, 0,
+        GraphicsManager::createWindow(640, 480, 0,
         SDL_WINDOW_SHOWN | SDL_SWSURFACE), SDL_RENDERER_SOFTWARE));
 #else  // USE_SDL2
 
-    graphicsManager.createWindow(640, 480, 0, SDL_ANYFORMAT | SDL_SWSURFACE);
+    GraphicsManager::createWindow(640, 480, 0, SDL_ANYFORMAT | SDL_SWSURFACE);
 #endif  // USE_SDL2
 
     theme = new Theme;
diff --git a/src/unittests/resources/map/maplayer/drawfringesimple.cc b/src/unittests/resources/map/maplayer/drawfringesimple.cc
index 2865c8299..ad2c87434 100644
--- a/src/unittests/resources/map/maplayer/drawfringesimple.cc
+++ b/src/unittests/resources/map/maplayer/drawfringesimple.cc
@@ -64,11 +64,11 @@ TEST_CASE("MapLayer drawFringe simple", "")
 
 #ifdef USE_SDL2
     SDLImageHelper::setRenderer(graphicsManager.createRenderer(
-        graphicsManager.createWindow(640, 480, 0,
+        GraphicsManager::createWindow(640, 480, 0,
         SDL_WINDOW_SHOWN | SDL_SWSURFACE), SDL_RENDERER_SOFTWARE));
 #else  // USE_SDL2
 
-    graphicsManager.createWindow(640, 480, 0, SDL_ANYFORMAT | SDL_SWSURFACE);
+    GraphicsManager::createWindow(640, 480, 0, SDL_ANYFORMAT | SDL_SWSURFACE);
 #endif  // USE_SDL2
 
     theme = new Theme;
diff --git a/src/unittests/resources/map/maplayer/drawspeciallayer1.cc b/src/unittests/resources/map/maplayer/drawspeciallayer1.cc
index 01adf0ee7..8e60592f7 100644
--- a/src/unittests/resources/map/maplayer/drawspeciallayer1.cc
+++ b/src/unittests/resources/map/maplayer/drawspeciallayer1.cc
@@ -60,11 +60,11 @@ TEST_CASE("MapLayer drawSpecialLayer (specialLayer)", "")
 
 #ifdef USE_SDL2
     SDLImageHelper::setRenderer(graphicsManager.createRenderer(
-        graphicsManager.createWindow(640, 480, 0,
+        GraphicsManager::createWindow(640, 480, 0,
         SDL_WINDOW_SHOWN | SDL_SWSURFACE), SDL_RENDERER_SOFTWARE));
 #else  // USE_SDL2
 
-    graphicsManager.createWindow(640, 480, 0, SDL_ANYFORMAT | SDL_SWSURFACE);
+    GraphicsManager::createWindow(640, 480, 0, SDL_ANYFORMAT | SDL_SWSURFACE);
 #endif  // USE_SDL2
 
     Map *map = nullptr;
diff --git a/src/unittests/resources/map/maplayer/drawspeciallayer2.cc b/src/unittests/resources/map/maplayer/drawspeciallayer2.cc
index 9897f3ad3..b40ac745b 100644
--- a/src/unittests/resources/map/maplayer/drawspeciallayer2.cc
+++ b/src/unittests/resources/map/maplayer/drawspeciallayer2.cc
@@ -60,11 +60,11 @@ TEST_CASE("MapLayer drawSpecialLayer (tempLayer)", "")
 
 #ifdef USE_SDL2
     SDLImageHelper::setRenderer(graphicsManager.createRenderer(
-        graphicsManager.createWindow(640, 480, 0,
+        GraphicsManager::createWindow(640, 480, 0,
         SDL_WINDOW_SHOWN | SDL_SWSURFACE), SDL_RENDERER_SOFTWARE));
 #else  // USE_SDL2
 
-    graphicsManager.createWindow(640, 480, 0, SDL_ANYFORMAT | SDL_SWSURFACE);
+    GraphicsManager::createWindow(640, 480, 0, SDL_ANYFORMAT | SDL_SWSURFACE);
 #endif  // USE_SDL2
 
     Map *map = nullptr;
diff --git a/src/unittests/resources/map/speciallayer.cc b/src/unittests/resources/map/speciallayer.cc
index 443d252b5..c3b1f78b8 100644
--- a/src/unittests/resources/map/speciallayer.cc
+++ b/src/unittests/resources/map/speciallayer.cc
@@ -65,11 +65,11 @@ TEST_CASE("SpecialLayer updateCache", "")
 
 #ifdef USE_SDL2
     SDLImageHelper::setRenderer(graphicsManager.createRenderer(
-        graphicsManager.createWindow(640, 480, 0,
+        GraphicsManager::createWindow(640, 480, 0,
         SDL_WINDOW_SHOWN | SDL_SWSURFACE), SDL_RENDERER_SOFTWARE));
 #else  // USE_SDL2
 
-    graphicsManager.createWindow(640, 480, 0, SDL_ANYFORMAT | SDL_SWSURFACE);
+    GraphicsManager::createWindow(640, 480, 0, SDL_ANYFORMAT | SDL_SWSURFACE);
 #endif  // USE_SDL2
 
     userPalette = new UserPalette;
diff --git a/src/unittests/resources/resourcemanager/resourcemanager.cc b/src/unittests/resources/resourcemanager/resourcemanager.cc
index 0f4a7db65..39871e3c7 100644
--- a/src/unittests/resources/resourcemanager/resourcemanager.cc
+++ b/src/unittests/resources/resourcemanager/resourcemanager.cc
@@ -110,11 +110,11 @@ TEST_CASE("resourcemanager", "resourcemanager")
 
 #ifdef USE_SDL2
     SDLImageHelper::setRenderer(graphicsManager.createRenderer(
-        graphicsManager.createWindow(640, 480, 0,
+        GraphicsManager::createWindow(640, 480, 0,
         SDL_WINDOW_SHOWN | SDL_SWSURFACE), SDL_RENDERER_SOFTWARE));
 #else  // USE_SDL2
 
-    graphicsManager.createWindow(640, 480, 0, SDL_ANYFORMAT | SDL_SWSURFACE);
+    GraphicsManager::createWindow(640, 480, 0, SDL_ANYFORMAT | SDL_SWSURFACE);
 #endif  // USE_SDL2
 
     userPalette = new UserPalette;
diff --git a/src/unittests/resources/sdlimagehelper.cc b/src/unittests/resources/sdlimagehelper.cc
index 8c858ce69..67aaa384b 100644
--- a/src/unittests/resources/sdlimagehelper.cc
+++ b/src/unittests/resources/sdlimagehelper.cc
@@ -89,11 +89,11 @@ TEST_CASE("sdlimagehelper combineSurface", "")
 
 #ifdef USE_SDL2
     SDLImageHelper::setRenderer(graphicsManager.createRenderer(
-        graphicsManager.createWindow(640, 480, 0,
+        GraphicsManager::createWindow(640, 480, 0,
         SDL_WINDOW_SHOWN | SDL_SWSURFACE), SDL_RENDERER_SOFTWARE));
 #else  // USE_SDL2
 
-    graphicsManager.createWindow(640, 480, 0, SDL_ANYFORMAT | SDL_SWSURFACE);
+    GraphicsManager::createWindow(640, 480, 0, SDL_ANYFORMAT | SDL_SWSURFACE);
 #endif  // USE_SDL2
 
     userPalette = new UserPalette;
diff --git a/src/unittests/resources/sprite/animatedsprite.cc b/src/unittests/resources/sprite/animatedsprite.cc
index 34627ff07..1f5f6f9ef 100644
--- a/src/unittests/resources/sprite/animatedsprite.cc
+++ b/src/unittests/resources/sprite/animatedsprite.cc
@@ -78,11 +78,11 @@ TEST_CASE("AnimatedSprite tests", "animatedsprite")
 
 #ifdef USE_SDL2
     SDLImageHelper::setRenderer(graphicsManager.createRenderer(
-        graphicsManager.createWindow(640, 480, 0,
+        GraphicsManager::createWindow(640, 480, 0,
         SDL_WINDOW_SHOWN | SDL_SWSURFACE), SDL_RENDERER_SOFTWARE));
 #else  // USE_SDL2
 
-    graphicsManager.createWindow(640, 480, 0, SDL_ANYFORMAT | SDL_SWSURFACE);
+    GraphicsManager::createWindow(640, 480, 0, SDL_ANYFORMAT | SDL_SWSURFACE);
 #endif  // USE_SDL2
 
     theme = new Theme;
diff --git a/src/unittests/sdl.cc b/src/unittests/sdl.cc
index 9869db35f..b9dc74299 100644
--- a/src/unittests/sdl.cc
+++ b/src/unittests/sdl.cc
@@ -79,13 +79,13 @@ TEST_CASE("sdl tests", "sdl")
     imageHelper = new SurfaceImageHelper;
 
     SDLImageHelper::setRenderer(graphicsManager.createRenderer(
-        graphicsManager.createWindow(640, 480, 0,
+        GraphicsManager::createWindow(640, 480, 0,
         SDL_WINDOW_SHOWN | SDL_SWSURFACE), SDL_RENDERER_SOFTWARE));
 #else  // USE_SDL2
 
     imageHelper = new SDLImageHelper();
 
-    graphicsManager.createWindow(640, 480, 0, SDL_ANYFORMAT | SDL_SWSURFACE);
+    GraphicsManager::createWindow(640, 480, 0, SDL_ANYFORMAT | SDL_SWSURFACE);
 #endif  // USE_SDL2
 
     userPalette = new UserPalette;
diff --git a/src/unittests/utils/chatutils.cc b/src/unittests/utils/chatutils.cc
index e3c1dba1a..5e06baaca 100644
--- a/src/unittests/utils/chatutils.cc
+++ b/src/unittests/utils/chatutils.cc
@@ -74,11 +74,11 @@ TEST_CASE("chatutils replaceVars", "")
 
 #ifdef USE_SDL2
     SDLImageHelper::setRenderer(graphicsManager.createRenderer(
-        graphicsManager.createWindow(640, 480, 0,
+        GraphicsManager::createWindow(640, 480, 0,
         SDL_WINDOW_SHOWN | SDL_SWSURFACE), SDL_RENDERER_SOFTWARE));
 #else  // USE_SDL2
 
-    graphicsManager.createWindow(640, 480, 0, SDL_ANYFORMAT | SDL_SWSURFACE);
+    GraphicsManager::createWindow(640, 480, 0, SDL_ANYFORMAT | SDL_SWSURFACE);
 #endif  // USE_SDL2
 
     theme = new Theme;
diff --git a/src/unittests/utils/itemxmlutils.cc b/src/unittests/utils/itemxmlutils.cc
index 54c112bbc..8572d3ca5 100644
--- a/src/unittests/utils/itemxmlutils.cc
+++ b/src/unittests/utils/itemxmlutils.cc
@@ -72,11 +72,11 @@ TEST_CASE("itemxmlutils readItemStatsString 1", "")
 
 #ifdef USE_SDL2
     SDLImageHelper::setRenderer(graphicsManager.createRenderer(
-        graphicsManager.createWindow(640, 480, 0,
+        GraphicsManager::createWindow(640, 480, 0,
         SDL_WINDOW_SHOWN | SDL_SWSURFACE), SDL_RENDERER_SOFTWARE));
 #else  // USE_SDL2
 
-    graphicsManager.createWindow(640, 480, 0, SDL_ANYFORMAT | SDL_SWSURFACE);
+    GraphicsManager::createWindow(640, 480, 0, SDL_ANYFORMAT | SDL_SWSURFACE);
 #endif  // USE_SDL2
 
     userPalette = new UserPalette;
@@ -242,11 +242,11 @@ TEST_CASE("itemxmlutils readItemStatsVector 1", "")
 
 #ifdef USE_SDL2
     SDLImageHelper::setRenderer(graphicsManager.createRenderer(
-        graphicsManager.createWindow(640, 480, 0,
+        GraphicsManager::createWindow(640, 480, 0,
         SDL_WINDOW_SHOWN | SDL_SWSURFACE), SDL_RENDERER_SOFTWARE));
 #else  // USE_SDL2
 
-    graphicsManager.createWindow(640, 480, 0, SDL_ANYFORMAT | SDL_SWSURFACE);
+    GraphicsManager::createWindow(640, 480, 0, SDL_ANYFORMAT | SDL_SWSURFACE);
 #endif  // USE_SDL2
 
     userPalette = new UserPalette;
diff --git a/src/unittests/utils/translation/poparser.cc b/src/unittests/utils/translation/poparser.cc
index cd46e4768..bf5abaca4 100644
--- a/src/unittests/utils/translation/poparser.cc
+++ b/src/unittests/utils/translation/poparser.cc
@@ -65,11 +65,11 @@ TEST_CASE("PoParser tests", "PoParser")
 
 #ifdef USE_SDL2
     SDLImageHelper::setRenderer(graphicsManager.createRenderer(
-        graphicsManager.createWindow(640, 480, 0,
+        GraphicsManager::createWindow(640, 480, 0,
         SDL_WINDOW_SHOWN | SDL_SWSURFACE), SDL_RENDERER_SOFTWARE));
 #else  // USE_SDL2
 
-    graphicsManager.createWindow(640, 480, 0, SDL_ANYFORMAT | SDL_SWSURFACE);
+    GraphicsManager::createWindow(640, 480, 0, SDL_ANYFORMAT | SDL_SWSURFACE);
 #endif  // USE_SDL2
 
     theme = new Theme;
diff --git a/src/unittests/utils/xml.cc b/src/unittests/utils/xml.cc
index 022fd1c4a..fa4bfc789 100644
--- a/src/unittests/utils/xml.cc
+++ b/src/unittests/utils/xml.cc
@@ -75,11 +75,11 @@ TEST_CASE("xml doc", "")
 
 #ifdef USE_SDL2
     SDLImageHelper::setRenderer(graphicsManager.createRenderer(
-        graphicsManager.createWindow(640, 480, 0,
+        GraphicsManager::createWindow(640, 480, 0,
         SDL_WINDOW_SHOWN | SDL_SWSURFACE), SDL_RENDERER_SOFTWARE));
 #else  // USE_SDL2
 
-    graphicsManager.createWindow(640, 480, 0, SDL_ANYFORMAT | SDL_SWSURFACE);
+    GraphicsManager::createWindow(640, 480, 0, SDL_ANYFORMAT | SDL_SWSURFACE);
 #endif  // USE_SDL2
 
     theme = new Theme;
diff --git a/src/unittests/utils/xmlutils.cc b/src/unittests/utils/xmlutils.cc
index 848f2ce49..482580af5 100644
--- a/src/unittests/utils/xmlutils.cc
+++ b/src/unittests/utils/xmlutils.cc
@@ -64,11 +64,11 @@ TEST_CASE("xmlutils readXmlIntVector 1", "")
 
 #ifdef USE_SDL2
     SDLImageHelper::setRenderer(graphicsManager.createRenderer(
-        graphicsManager.createWindow(640, 480, 0,
+        GraphicsManager::createWindow(640, 480, 0,
         SDL_WINDOW_SHOWN | SDL_SWSURFACE), SDL_RENDERER_SOFTWARE));
 #else  // USE_SDL2
 
-    graphicsManager.createWindow(640, 480, 0, SDL_ANYFORMAT | SDL_SWSURFACE);
+    GraphicsManager::createWindow(640, 480, 0, SDL_ANYFORMAT | SDL_SWSURFACE);
 #endif  // USE_SDL2
 
     userPalette = new UserPalette;
@@ -124,11 +124,11 @@ TEST_CASE("xmlutils readXmlStringMap 1", "")
 
 #ifdef USE_SDL2
     SDLImageHelper::setRenderer(graphicsManager.createRenderer(
-        graphicsManager.createWindow(640, 480, 0,
+        GraphicsManager::createWindow(640, 480, 0,
         SDL_WINDOW_SHOWN | SDL_SWSURFACE), SDL_RENDERER_SOFTWARE));
 #else  // USE_SDL2
 
-    graphicsManager.createWindow(640, 480, 0, SDL_ANYFORMAT | SDL_SWSURFACE);
+    GraphicsManager::createWindow(640, 480, 0, SDL_ANYFORMAT | SDL_SWSURFACE);
 #endif  // USE_SDL2
 
     userPalette = new UserPalette;
@@ -184,11 +184,11 @@ TEST_CASE("xmlutils readXmlIntMap 1", "")
 
 #ifdef USE_SDL2
     SDLImageHelper::setRenderer(graphicsManager.createRenderer(
-        graphicsManager.createWindow(640, 480, 0,
+        GraphicsManager::createWindow(640, 480, 0,
         SDL_WINDOW_SHOWN | SDL_SWSURFACE), SDL_RENDERER_SOFTWARE));
 #else  // USE_SDL2
 
-    graphicsManager.createWindow(640, 480, 0, SDL_ANYFORMAT | SDL_SWSURFACE);
+    GraphicsManager::createWindow(640, 480, 0, SDL_ANYFORMAT | SDL_SWSURFACE);
 #endif  // USE_SDL2
 
     userPalette = new UserPalette;