| 摘要 |
<p>PROBLEM TO BE SOLVED: To properly swing a screen display while preventing a capacity increase in storage data.SOLUTION: Image data to be used in a screen display being as large as a display area of an image display device is read from an image data memory, and a performance image GD2 for performing a screen display by a reversed display is created while respectively coming into contact with both of a forward direction side and a second reverse direction side of the screen display by a normal display. A selection range of data corresponding to the display area of the image display device in image data temporarily stored in a VRAM is displaced in the forward direction side or the reverse direction side in each predetermined period, and swinging display performance that is alternately swung in a predetermined period is performed. Even though image data corresponding to the performance image GD2 is not temporarily stored in the VRAM, only the screen display of the performance image GD2 can be achieved in the display area of the image display device by writing the image data read from the image data memory in a virtual display area of a frame buffer with a prescribed procedure.</p> |
