lua api: add core.take_screenshot()

src/script/lua_api/l_client.cpp

@@ -524,6 +524,14 @@ int ModApiClient::l_get_objects_inside_radius(lua_State *L)
 	return 1;
 }
 
+//take_screenshot()
+int ModApiClient::l_take_screenshot(lua_State *L)
+{
+  getClient(L)->makeScreenshot();
+  lua_pushboolean(L, true);
+  return 1;
+}
+
 void ModApiClient::Initialize(lua_State *L, int top)
 {
 	API_FCT(get_current_modname);
@@ -558,4 +566,6 @@ void ModApiClient::Initialize(lua_State *L, int top)
 	API_FCT(set_keypress);
 	API_FCT(drop_selected_item);
 	API_FCT(get_objects_inside_radius);
+	API_FCT(take_screenshot);
+
 }

src/script/lua_api/l_client.h

@@ -126,6 +126,9 @@ private:
 	// get_objects_inside_radius(pos, radius)
 	static int l_get_objects_inside_radius(lua_State *L);
 
+        //take_screenshot()
+        static int l_take_screenshot(lua_State *L);
+
 public:
 	static void Initialize(lua_State *L, int top);
 };