| 摘要 |
PURPOSE:To fill the area of a graphic displayed optionally on a display regardless of the memory capacity by changing the logical value in order to fill the inner area of the graphic. CONSTITUTION:A CPU 10 scans a single line out of a memory 11 within a screen range including a closed graphic in order to read out the data for each line and then to check whether the start and end point dots serving as the boundary points showing the contour of the closed graphic are included in the single line or not. If so, the data on a range set between both dots is inverted into the logical value equal to those of both dots. This inverted data is displayed on a display screen 12. This operation is repeated until a single screen range ends. Thus the closed area of the closed graphic is filled for each dot and displayed. Furthermore the especially large capacity is not required for the memory 11. |
