| 摘要 |
PURPOSE:To decrease the used capacity of a memory in a changed attribute holding area by saving only the data to a changed attribute. CONSTITUTION:When a graphic plotting request comes from an application program 10, first of all, a plotting processing means center 21 of a graphic processing system 20 calls an area initializing means 22. The area initializing means 22 secures and initializes a temporary area 26, basic attribute table area 27 and changed attribute holding area 28. In the case of attribute data, the kind and value of the attribute are paired and held in the temporary area 26 by a temporary changed attribute holding means 23. In the case of reference data, the temporary area data in the temporary area 26 are saved in the changed attribute holding area 28 by a changed attribute saving means 28. In the case of completing a reference processing to another structure, the temporary area data saved in the changed attribute holding area 28 are developed to the temporary area 26 and the basic attribute table area 27 by a changed attribute acquiring means 25. |
