| 摘要 |
<p>PURPOSE:To quickly draw a picture and prevent a segment from being discontinuous on boundaries of division even at the time of dividing a window into plural clipping frames. CONSTITUTION:A graphic command generating means 21 generates a graphic command at the time of coming of the graphic plotting request from a user program 10, and a window clip list preserving means 22 preserves information of clip frames constituting the window. A clipping information storing and referring means 23 clips segments constituting the graphic based on information of a clipping frame and preserves clipping information related to segments and refers to clipping information related to segments, which are preserved at the time of performing the same processing of another clipping frame on the same window, to regenerate such graphic command that segments are continuous on boundaries due to division of the window into clipping frames. A plotting means 24 plots the graphic on a graphic display device 30 by the regenerated graphic command.</p> |
