Title:
GRAPHIC DATA RESTORATION SYSTEM IN GRAPHIC PROCESSING SYSTEM
Document Type and Number:
Japanese Patent JPS62219073
Kind Code:
A
Abstract:
PURPOSE:To drop the using frequency of a CPU and to speed up a display on a graphic display compared with a conventional method by holding unupdated data on a part specified by an instruction in a memory part, replacing it with updated data at the time of restoring graphic data and obtaining previous graphic data. CONSTITUTION:Data is stored in an input data area 7, and the control is handed to a distribution routine 2 from a main routine 1. If input data is a restoration processing command, the control is handed to a restoration processing routine 4. It fetches original graphic data before undate out of a file 9, registers it to graphic data in a graphic data area 8, processes the graphic data by a display processing routine 5, and displays said data on a graphic display 10 through an I/O side routine 6. If the input data is not the restoration processing command, the copy of updated original graphic data at a position that the input data specifies is stored on the file 9 from the graphic data area 8, and the control is handed to an execution processing routine 3.
Inventors:
TERAUCHI KUNIO
Application Number:
JP6054186A
Publication Date:
September 26, 1987
Filing Date:
March 20, 1986
Export Citation:
Assignee:
HITACHI LTD
International Classes:
G06F17/50; (IPC1-7): G06F15/62
Attorney, Agent or Firm:
Katsuo Ogawa
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