| 摘要 |
PURPOSE:To paint-out an area surrounded by a closed curve, to paint-out at high speed and to facilitate hardwaring by writing the exclusive OR data of the data of a point on one scanning line concerning all scanning lines. CONSTITUTION:One point of leakage itself is written for one side point and the other point dislocated by one point only in a scanning direction among two-end point of each line segment are written into a bit map memory respectively concerning all segments to paint-out along a scanning direction. The exclusive OR data of the data of the point on one scanning line are written concerning all scanning lines, and thus, the pattern data to execute the paint-out of an area surrounded by the closed curve are prepared. Thus, the processing of sorting is made unnecessary, processing speed is highly speedy and exclusive- use hardwaring is facilitated. |
