| 摘要 |
PROBLEM TO BE SOLVED: To program various display images without considering the loads of an arithmetic unit. SOLUTION: Image processings such as the rotation and reduction, etc., of images read from a CG memory 21 are performed by using a display working engine 25. An image changeover limiting circuit 30 continuously outputs changeover inhibition signals for stopping the output of switching signals to switches 32a and 32b for switching frame buffers 32c and 32d until the display working engine 25 ends the processing of the image of highest priority. At the rising timing of next vertical synchronizing signals after the processing is ended and the changeover inhibition signals are switched to H, the switches 32a and 32b are switched. Thus, even at the time of displaying the images for taking time for the processing, the disturbance of the images is eliminated, the degree of freedom of the program of the images is raised and complicated images can be displayed as well. |
