emWin Rotation API

Hi,

I m working for a project having LCD display. We are using STM32439I-EVAL board with frequency of 180MHz. There is a time limit that the LCD display should be updated in every 40ms. But the rotation API itself is taking 160ms.

GUI_MEMDEV_RotateHQHR(hMem, hMemWork, mx , my, Roll, 1000);

This is the API i have used for rotating the MEM_DEV. MEM DEV created using

GUI_MEMDEV_CreateFixed(40, 0, 400, 1200, GUI_MEMDEV_NOTRANS, GUI_MEMDEV_APILIST_32, GUICC_8888);

Please let me know this is the expected time to rotate the MEM DEV of the given size or perfomance can be improved by any other method?

Please provide me a solution at the earliest.

Thanks.