| 摘要 |
<p>PURPOSE: To display an overlapped window by effectively operating clipping an overlapped area. CONSTITUTION: A list 50 of a graphic order for normalizing a graphic object to be displayed is processed, and a list 54 of the corrected graphic order for indicating the part of the graphic object which is not overlapped by an overlapped area is generated. A mechanism 52 which operates clipping to the inside of an area normalized by a boundary decides which part of the area of the graphic is positioned outside the area normalized by the boundary. A display 56 is driven by the list 54 of the corrected graphic order, and an overlapped window is displayed. The graphic of the mode of a line, area normalized by the line, image constituted of the array of a picture element, and mark set character are processed.</p> |
