Tearing problem at bigger overlay sizes

[Matthias Hopf]

On Jan 09, 09 22:01:12 +0100, Christiaan van Dijk wrote:
> > The engine is still stalling for the vline.  The problem is you are
> > hitting the hw guardband limits on r3xx/r4xx.  The diagonal tearing is
> > due to the fact that the hw renders a quad as two triangles.  To avoid
> > this we render to a single clipped triangle; this means the triangle

If you're using guardband clipping, this means that you're really
rasterizing (and throwing away) an awful lot of pixels. And this is
still fast enough? Fascinating.

Matthias

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