IDirectFBSurface - Flip [DirectFB Reference Manual]

Flip

Flip/Update surface buffers.

Flip (

IDirectFBSurface * thiz,

const DFBRegion * region,

DFBSurfaceFlipFlags flags

);

If no region is specified the whole surface is flipped, otherwise blitting is used to update the region. If surface capabilities don't include DSCAPS_FLIPPING, this method has the effect to make visible changes made to the surface contents.
如果没有指定范围，那么整个表面会被弹出，否则blitting被用来更新这个区域。如果表面属性没有包含DSCAPS_FLIPPING，这种方法可以使用得改变这个表面的内容可见的作用。

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Flip (
	IDirectFBSurface	*	thiz,
	const DFBRegion	*	region,
	DFBSurfaceFlipFlags		flags
);