| 摘要 |
<p>PURPOSE:To increase the speed of drawing display by simplifying processing for copying among three points and shortening the processing time. CONSTITUTION:When drawing becomes necessary, a server outputs an event to a client and decides whether or not an object window is of the top priority on receiving its answer signal. When not, processings in steps 4-7 are performed, but when the window is of the top priority, drawing is performed directly on a display plane in a step 8. In the step 4 and succeeding steps, the contents of the object window are transferred to a source plane and a mask is formed on a mask plane. Then, drawing on the source plane is performed in response to a request signal and after the drawing, copying among the three points is carried out to transfer the data to the display plane, thereby redrawing the data on the display plane. The image on the display plane is displayed on a screen as it is.</p> |
