Simple non feathered circles is complete. Cairo is 29% faster with circles.
Cheers!
2012/8/7 Carlos López González <genet...@gmail.com>
> Ok, so now working on Circle layer.
> Initially the code will be similar to the rectangle but I was scratching
> my head on how to emulate the feather. Then I discovered that a circle with
> zero radius will render a feather if requested, what surprised to me
> initially because I guessed that the feather was some kind of blur based on
> the rendered circle but that's not that way.
>
> That discovery helped me to figure out one way to draw the feather. The
> feather can be perfectly emulated in Synfig itself by placing a Radial
> gradient with the proper color values and radiuses. So in the case of
> feathered circles I'll produce the render in Cairo y creating the proper
> radial gradient.
> Since the circle has different falloffs of the feather (Linear, Cosine,
> Square, etc.) and Cairo's radial gradient only supports linear falloff
> between control points of the gradient it will be needed to evaluate the
> falloff function is several points (it will depend on the quality) to match
> the same render result than the Software render.
>
> I'm happy because it will be a solution for the feathered circle.
>
> Please see attached image as example for what I'm talking about.
> http://imagebin.org/223654
> The left circle is rendered using a Circle layer and the right one is
> rendered using a Radial Gradient layer. Everything using Software render.
> I expect to have a Circle layer fully rendered using Cairo API in a few
> days.
>
> Cheers!
>
>
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