CLuaInstance: Add script fumction 'scale2Res'

- Set Lua api version to 1.69

src/gui/lua/lua_api_version.h

@@ -4,4 +4,4 @@
  * to luainstance.h changes
  */
 #define LUA_API_VERSION_MAJOR 1
-#define LUA_API_VERSION_MINOR 68
+#define LUA_API_VERSION_MINOR 69

src/gui/lua/luainstance.cpp

@@ -568,6 +568,7 @@ void LuaInstRegisterFunctions(lua_State *L, bool fromThreads/*=false*/)
 		{ "saveScreen",             CLuaInstance::saveScreen },
 		{ "restoreScreen",          CLuaInstance::restoreScreen },
 		{ "deleteSavedScreen",      CLuaInstance::deleteSavedScreen },
+		{ "scale2Res",              CLuaInstance::scale2Res },
 
 		/*
 		   lua_misc.cpp
@@ -1183,4 +1184,22 @@ int CLuaInstance::deleteSavedScreen(lua_State *L)
 	return 0;
 }
 
+int CLuaInstance::scale2Res(lua_State *L)
+{
+	CLuaData *W = CheckData(L, 1);
+	if (!W || !W->fbwin) return 0;
+
+	int value, ret;
+	value = luaL_checkint(L, 2);
+
+/* Remove this when pu/fb-setmode branch is merged to master */
+#ifdef SCALE2RES_DEFINED
+	ret = CFrameBuffer::getInstance()->scale2Res(value);
+#else
+	ret = value;
+#endif
+	lua_pushinteger(L, ret);
+	return 1;
+}
+
 /* --------------------------------------------------------------- */

src/gui/lua/luainstance.h

@@ -73,6 +73,7 @@ public:
 	static int saveScreen(lua_State *L);
 	static int restoreScreen(lua_State *L);
 	static int deleteSavedScreen(lua_State *L);
+	static int scale2Res(lua_State *L);
 
 private:
 	lua_State* lua;