Some fixes for the triangle video rendering

[Alex Deucher]

On Sat, Jan 10, 2009 at 12:34 PM, Christiaan van Dijk <dvbmail at xs4all.nl> wrote:
> Not sure where to post this but wanted to share, so here it is :-)
>
> While trying to get tear free video on my RS690 I found some problems in the
> code for rendering the video as a clipped triangle. The size limitations are
> quite strict and scaling the video output window creates all kinds of weird
> effects. This patch maximizes the use of this function and resolves the
> scaling issues. There could be a problem with zero target height/width, not
> sure if this is handled elsewhere.

Looks good. Pushed:
b437da34cb4f7c637674fb432ad81b9bf32244a3

Thanks!

Alex