| 摘要 |
In order to efficiently conduct the display processing of a GUI screen by suppressing the drawing of unnecessary objects, the objects are, first, searched from the front toward the rear according to a reverse painter's algorithm while tracing a z-order for processing the drawing. In this step, flags necessary for the drawing may be raised instead of drawing the objects, and a z-buffer needs not be provided. The objects can be really drawn from the rear toward the front according to a painter's algorithm.
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