| 摘要 |
PURPOSE:To shorten the paint-out processing time by providing a hole memory which uses the graphic data that carries out no paint-out operation as an input and outputs the corresponding write inhibiting signal. CONSTITUTION:In case a paint-out operation is required for the inside of a comparatively large polygon area and at the same time this polygon includes a polygon area where the internal paint-out is inhibited, this inhibited polygon is discriminated from other ones and written into a hole memory 4. Then the data written into the memory 4 is read out and supplied to a drawing means 1 as the write control signal. Thus it is possible to perform the paint-out processing to an entire area except an inhibited area. |
