| 摘要 |
PURPOSE:To speed up paint out and to facilitate hardwaring by executing the final paint-out with the arithmetic result of a point corresponding to the boundary of a closed curve and the exclusive OR data of the data of a point necessary for the paint-out of the area of the closed curve. CONSTITUTION:A point corresponding to the boundary of the closed curve is prepared from the data of dx and dy is generated, written to a first bit map memory, a point necessary for painting out the area of the closed curve is prepared and written into a second bit map memory. Next, the exclusive OR data of the data of the point on one scanning line are successively written on a second bit map memory into the second bit map memory, the operation of the data of the arbitrary point of the first bit map memory is executed and the pattern data to execute the final paint-out is obtained. |
