Re: SVG2 polyfill

On Thu, 2016-08-25 at 15:44 -0400, Doug Schepers wrote:
> Hi, folks–
> 
> David, just to be clear, what Frédéric is suggesting is a polyfill, 
> which is a specific kind of javascript library. An SVG 2 polyfill
> would 
> provide a temporary patch for new SVG features in browsers that
> don't 
> yet support them, so that people could use SVG 2 even before it's 
> universally interoperable across browsers.
> 
> Frédéric, I'm not sure how possible this would be for some features,
> but 
> I think it's a great idea.

I think it is a great idea too and I would participate.

Tav


> Regards–
> Doug
> 
> On 8/24/16 6:30 PM, David Dailey wrote:
> > 
> > Fwiw, David Leunen has been working on FakeSmile [1] that is sort
> > of a
> > polyfill for SMIL-ish things. Am not sure if he’s still actively
> > doing
> > it or not.
> > 
> > 
> > 
> > Then there is the <replicate>[2] and <random>[3] stuff that allows
> > Processing.js type to create interpolations, replications,
> > randomizations, tessellations, nonlinear gradients and 2.5D stuff.
> > Both
> > FakeSmile and <replicate> involve parsing out the modifiers of SVG
> > elements (pattern, filter, gradient, etc) so that as objects are
> > replicated they can be incrementally changed (even using keySplines
> > to
> > adjust the rate of change). See example [4]. It also allows for
> > values
> > of quantitative attributes (not just x and y) to be controlled by
> > values
> > taken from a user-defined SVG path, providing much more precise and
> > intuitive shaping of curves than keySplines would affort.
> > 
> > 
> > 
> > The desire to have declarative randomness in SVG has been often
> > expressed, and this addresses the ability to run skeins that have
> > either
> > fixed or randomized start-seeds.
> > 
> > 
> > 
> > The core business of parsing values lists, as well as from-to, and
> > interpolation is common between <animate> and <replicate> being
> > based on
> > the same conceptual model of the universe, so some of the code used
> > in
> > replicate could prove useful to new work on polyfills. Replicate
> > also
> > has the advantage that it extends concepts present in SMIL in new
> > directions very consistent with original design intentions of SVG.
> >  Several of these extensions to SMIL’s functionality are things I
> > hope
> > that SVG3 may be willing to consider since a lot of the
> > HTML/CSS/SVG
> > playground rules have been established by SVG2.
> > 
> > 
> > 
> > I think we may have used some of FakeSmile in <replicate> , I can’t
> > recall, but the .js stuff in <replicate> here [5] is open source.
> > Since
> > I’ve recently figured out how to parse CSS rules [6] (never tried
> > it
> > before, but CSS is actually starting to work with SVG in some
> > places
> > now, so I have started to get interested), I’ve been considering
> > extending <replicate> to include the parsing of CSS rules, so that
> > one
> > might take those things that CSS offers that SVG doesn’t yet (like
> > 3D
> > rotation, text flow, and blend modes[7]) and somehow modify during
> > the
> > process of extrapolation along a path.  Not quite sure yet, what
> > gradually modifying a perspective transform along a Bezier curve
> > would
> > give us that modifying an affine one doesn’t, but it could prove
> > interesting! I’ll see if any students are interested in such, and
> > that
> > project may have a bit of new life.
> > 
> > 
> > 
> > Am also interested in using SVG + Replicate +random as a
> > declarative
> > syntax that could then be cross-coded into WebGL, so that a 3D
> > model is
> > quickly sketched in that declarative environment and then poofed
> > (technical term) into a full blown WebGL with wireframe and
> > shaders.
> > Again a fun project, though I think it might require something like
> > a
> > summer-of-code project rather than just an undergrad volunteer or
> > two.
> > 
> > 
> > 
> > Cheers
> > 
> > David
> > 
> > 
> > 
> > 
> > 
> > [1] https://leunen.me/fakesmile/
> > 
> > [2] http://srufaculty.sru.edu/david.dailey/svg/SVGOpen2010/replicat
> > e.htm
> > 
> > [3] http://cs.sru.edu/%7Eddailey/svg/RandomTalk.html
> > 
> > [4] http://cs.sru.edu/~ddailey/svg/svg2.svg
> > 
> > [5] http://granite.sru.edu/~svg/rep.js
> > <view-source:http://granite.sru.edu/%7Esvg/rep.js>;"
> > 
> > [6] http://cs.sru.edu/~ddailey/svg/3Dsimple0b.svg
> > 
> > [7] https://ello.co/ddailey/post/hwqd8hmolnwx7-vp4zocfq
> > 
> > 
> > 
> > *From:*Amelia Bellamy-Royds [mailto:amelia.bellamy.royds@gmail.com]
> > *Sent:* Wednesday, August 24, 2016 5:24 PM
> > *To:* Frédéric Guimont
> > *Cc:* www-svg
> > *Subject:* Re: SVG2 polyfill
> > 
> > 
> > 
> > I don't know of any polyfills currently being worked on, although
> > I've
> > heard a few people talk about maybe making polyfills for particular
> > features.  It's something I'd like to work on myself, but that's
> > probably not going to happen without funding.
> > 
> > 
> > 
> > It is certainly something working group members would like to see.
> > I'm
> > not sure how much support would be available to help with the
> > project,
> > but do keep us informed if you start work on it.
> > 
> > 
> > 
> > And please file spec issues (https://github.com/w3c/svgwg/issues)
> > if any
> > sections are unclear or inconsistent about what the behavior
> > *should* be.
> > 
> > 
> > 
> > Best,
> > 
> > Amelia Bellamy-Royds
> > 
> > 
> > 
> > On 24 August 2016 at 14:41, Frédéric Guimont
> > <frederic.guimont@savoirfairelinux.com
> > <mailto:frederic.guimont@savoirfairelinux.com>> wrote:
> > 
> > Hi all,
> > 
> > Is there anyone working on an SVG2 polyfill? If not, would there be
> > any
> > interest in such a project? I'm thinking of proposing an R&D
> > project on
> > the topic but I need more info first.
> > 
> > Thanks,
> > --
> > Frédéric Guimont, Consultant en logiciels libres
> > Savoir-faire Linux
> > 
> > Téléphone  : 418-525-7354 #362 <tel:418-525-7354%20%23362>
> > Ring ID    : d9396b8004d26120f1e948ac7a075ab7dd165077
> > www.savoirfairelinux.com <http://www.savoirfairelinux.com>
> > 
> > 
> >

Received on Friday, 26 August 2016 18:07:59 UTC