Re: PNG roots and farewell

On Thu, Feb 9, 2017 at 11:21 PM, Max Stepin <[email protected]> wrote:
> APNG is coming back, definitely. Thanks to Apple, it already works in
> iPhones and iPads, and not just in Safari:
> https://github.com/tinify/iMessage-Panda-sticker

A lot of distros (including gentoo) have the apng patch to libpng.
That means that any application built on libpng on those distros ends
up with APNG support, except, of course, it doesn't; it just ends up
with users complaining their PNG isn't moving.

But there is widespread support in a certain subset of the application
space, and I was aware of that when I made the "near death" comment.
There was been widespread support for some time, yet last time I
looked I couldn't find that much use of it.

Support is the first step, but the proof of the usefulness of
something is only obtained when people actually the feature!

> The thing is, APNG chunks are acTL, fcTL and fdAT, and it's too late to
> rename them, it became de-facto standard at this point.

Quite; I don't understand the point Chris was trying to make.  APNG is
done, now it lives or dies on its own merits.

I don't understand the point about RGB TIFF either; what's wrong with
RGB TIFF?  It supports a variety of compression methods, it is highly
extensible and can, if I understand correctly, support non-rectangular
pixel grids including grids where each pixel holds only one channel (R
or G or B); it seems to be ideal for the purposes it is used for.

-- 
John Bowler <[email protected]>
+1 (541) 450-9885
PO BOX 3151
KERBY OR 97531-3151
USA

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