To make a plurality of engines process simultaneously, if there is no context in the execution results of the plurality of engines, thereby significantly improving hardware acceleration effect.
A CPU 2 produces command lists CM1, CM3, on the basis of map data, and stores the lists in a memory 6. A first and a second graphics engines 3, 4 perform arithmetic processing based on the lists CM1, CM3, and stores a plotting result in a frame buffer 6a. At the same time, the CPU 2 produces command lists CM2, CM 4 based on new map data and stores the lists in the memory 6. An image output part 5 displays a map obtained from the plotting result on a monitor 9. At that time, the first and the second graphics engines 3, 4 read the lists CM2, CM4, perform image arithmetic processing, and store the plotting result in a frame buffer 6b. The image output part 5 displays a map obtained from the plotting result on the monitor 9. These steps are repeated, to display a car navigation map on the monitor 9.
NAKAMURA ATSUSHI
HAMAZAKI HIROYUKI
MIYAMOTO TAKASHI
OMURA KENICHIRO
SATO JUN
