Code works more or less good

src/main.cpp

@@ -249,11 +249,24 @@ int main(int argc, char *argv[]) {
         SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 3);
         SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_CORE);
 
+#ifdef FULLSCREEN
+        // Match the desktop's current resolution so the framebuffer matches
+        // the screen and we don't force a video mode change.
+        /*SDL_DisplayMode dm;
+        if (SDL_GetCurrentDisplayMode(0, &dm) == 0) {
+            ZL::Environment::width = dm.w;
+            ZL::Environment::height = dm.h;
+        }*/
+        const Uint32 windowFlags = SDL_WINDOW_OPENGL | SDL_WINDOW_SHOWN | SDL_WINDOW_FULLSCREEN_DESKTOP;
+#else
+        const Uint32 windowFlags = SDL_WINDOW_OPENGL | SDL_WINDOW_SHOWN;
+#endif
+
         ZL::Environment::window = SDL_CreateWindow(
             "Bishkek Witcher Game",
             SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED,
-            CONST_WIDTH, CONST_HEIGHT,
-            SDL_WINDOW_OPENGL | SDL_WINDOW_SHOWN
+            ZL::Environment::width, ZL::Environment::height,
+            windowFlags
         );
 
         SDL_GLContext ctx = SDL_GL_CreateContext(ZL::Environment::window);