There is provided a configuration in which completion of a drawing process by a drawing command executed by an application is detected and a conversion process and a display process are performed on an image to which the drawing process is completed. An application execution unit executing the drawing process and storing a drawing result in a storage unit, a display image generation unit converting a drawn image in the storage unit, and a buffer management unit switching a plurality of buffers in the storage unit are included. The application execution unit calls a drawing completion notification application programming interface (API) after drawing is completed. The buffer management unit switches the buffers in response to the API call. The display image generation unit executes the image conversion on the stored image in the buffer which is not the buffer in which drawing is being executed by the application execution unit.