Re: [Inkscape-devel] gradient mesh

Aaron Spike wrote: > Joshua A. Andler wrote: >> On Thu, 2009-12-24 at 08:14 -0600, Aaron Spike wrote: >>> Color in SVG includes an alpha channel. I've been told that rendering of >>> Coons patch meshes is ambiguous when this is the case. Does this also >>> affect Tensor-product patch meshes? >> I'm curious about the ambiguity. Do you recall why that was said? I'm >> sure it's more technical, but if it works how I imagine it could, it >> could afford great artistic leverage. > > IIRC extreme bends in the control beziers can cause the fill to self > overlap. Transparent or semi-transparent colors would allow the deeper > parts of the fill to bleed through. And once again, remember that I > don't know what I'm talking about. :-) There is an experimental implementation of mesh gradients for cairo at: http://cgit.freedesktop.org/~ajohnson/cairo/log/?h=mesh This branch makes it easy to write a few test cases help understand how PDF Type 6 and 7 gradients work. Some sample output (including self overlapping and transparency) is at: http://people.freedesktop.org/~ajohnson/mesh/