| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To implement flexible and effective security management of display information, in consideration of the attribute of a window to be displayed and a drawing result. <P>SOLUTION: Whenever a drawing command is executed, a computer system having a graphic user interface such as a multi-window system determines, from the logical operation pattern of the drawing command, what kind of information is inherited by a drawing result from the drawing command, preferably without performing a complicated step such as an image process. At the same time, the computer system controls information flow of an image output to a screen by managing labeled area maps which correspond one to one to images on the screen and in a memory. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
