Re: Introducing emacs-webkit and more thoughts on Emacs rendering (was Rethinking the design of xwidgets)

[Tomas Hlavaty]

On Tue 01 Dec 2020 at 16:36, Arthur Miller <arthur.miller@live.com> wrote:
> Tomas Hlavaty <tom@logand.com> writes:
>> It would be more convenient, if an image was represented as elisp data
>> instead of C data.
> :-) I don't think you have thought well about it;

Why would you say that?

> but really nothing forbids you to try to reprsent images as lisp.

What do you mean exactly?

> You can take any de-compressed image and read in raw pixels in as a byte
> buffer and just shuffle around numbers and see how it
> works for you.Image is nothing but a bunch of numbers + some tiny
> metadata on top of it. Take some of netpbm formats and you have "textual
> image" you can manipulate on per-pixel level with lisp.

Image in emacs is represented in C as "struct image".

Image type in emacs is represented in C as "struct image_type".

The issue is that there doesn't seem to be a way to extend those (and/or
define new) in pure elisp.