| 摘要 |
PURPOSE:To speed up character generation even when output devices are switched by turns by providing two cache data storage areas corresponding to the output devices and swapping cache data, which are stored for the respective output devices, onto a cache memory. CONSTITUTION:Character data read out of a font storage device 101 are expanded into a bit map font by an outline font generating device 105, and the bit map font is transferred to a display device 109 and also registered in a cache device 106. When the data are outputted on a printing device 110, the contents of the cache device 106 and cache data for printing saved in a swap file storage device 103 are exchanged by a swapping device 107. When the output device is switched to the display device 109 again, the contents of the cache device 106 and swap file storage devices 107 are similarly exchanged. Thus, the control is so performed that cache data corresponding to the output device in use are stored in the cache device 106 at all times. |
