D GUI Framework (responsive grid teaser)

NaN divide at by.zero
Sun May 26 17:41:01 UTC 2019

On Sunday, 26 May 2019 at 16:39:53 UTC, Manu wrote:
> On Sun, May 26, 2019 at 4:10 AM NaN via Digitalmars-d-announce 
> <digitalmars-d-announce at puremagic.com> wrote:
> What? ... this thread is bizarre.
> Why would a high quality SVG renderer decide to limit to 16x 
> AA? Are
> you suggesting that they use hardware super-sampling to render 
> the
> SVG?

They do both super-sampling and multi-sampling.


> Why would you use SSAA to render an SVG that way?
> I can't speak for their implementation, which you can only 
> possible
> speculate upon if you read the source code... but I would; for 
> each
> pixel, calculate the distance from the line, and use that as the
> falloff value relative to the line weighting property.

Because "path" in vector graphics terms is not just a line with 
thickness, it's like a glyph, it has inside and outside areas 
defined by the winding rule, it could be self intersecting etc. 
Working out how far a pixel is from a given line doesnt tell 
whether you should fill the pixel or not, or by how much.

Whether a pixel should be filled or not depends on everything 
that has happened either to the left or the right depending on 
which way your processing. It's not GPU friendly apparently.

You could decompose the path into triangles which would be more 
GPU friendly, but that's actually quite an involved problem. To 
put it in perspective decomposing a glyph into triangles so the 
gpu can render it is probably gonna take lot longer than just 
rendering it on the CPU.

> How is the web browser's SVG renderer even relevant? I have 
> absolutely no idea how this 'example' (or almost anything in 
> this thread) could be tied to the point I made way back at the 
> start before it went way off the rails. Just stop, it's killing 
> me.

Somebody said browsers have been doing 2D on the GPU for years i 
just pointed out that it was more complicated than that. I wasn't 
replying to anything you said and dont really know why what i've 
said has got your hackles up.

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