The Loop-Blinn code is dead and should be removed from WebKit. I believe Ken 
Russell implemented it to help with some Chrome/Skia drawing performance, but 
since then Skia itself updated to use a similar GPU-accelerated approach.

Dean

On 18 Jun 2014, at 6:07 pm, Michael IV <explomas...@gmail.com> wrote:

> Hi All.I have been investigating into WebKit text rendering details and I 
> found Loop-Blinn implementation in GPU directory of WebCore.I have tested it 
> and it kind of works ok for convex shapes rendering which probably should be 
> ok for text glyphs outline as well.
> But I have got a couple of question regarding this module:
> 1)Is it used by the browsers to render text or 2d shapes?
> 2)Is it actually ready for real-life usage?
> 3)How anti  aliasing is handled?I mean ,I found that only curves are 
> anti-aliased(internally by the shader) but the straight line outlines need 
> proper MSAA which can be pretty expensive or even unavailable  on some 
> platforms.
> 
> Also I found a bug: when drawing a path with two overlapping convex shapes 
> ,the hole created on the overlap region which is aliased.
> -- 
>  
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> webkit-dev@lists.webkit.org
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