| 摘要 |
PURPOSE:To make the shielding processing of graphic processing system be performed at high speed and effectively. CONSTITUTION:When a shielding area definition request exists, a frame to be controlled object is defined by an area definition means 21. When a graphic display request exists, the data of the present shielding area is stored in a storage means 3 by a writing means 22 and it is displayed on a CRT 5. If other graphic display request does not exist, the image data stored in the storage means 3 is displayed on the CRT 5. Therefore, the shielding of a display element of image information displayed on the display device is processed at high speed and the definition procedure by a user is simplified. |
