Re: Implementing image support for kitty terminal

[Tomas Hlavaty]

On Fri 09 Sep 2022 at 08:43, Eli Zaretskii <eliz@gnu.org> wrote:
> Yes, by changing the C code not to do that.
>
>> >>    (image-size (create-image "/tmp/a.jpg"))
>> >>    => (error "Window system frame should be used")
>> >
>> > This is us deliberately failing image-size early on, because we don't
>> > want complications down the road, and because we know images cannot be
>> > displayed on TTY frames.
>> 
>> I am asking emacs to tell me the size of the image.
>> I am not asking emacs to display it.
>
> But the code involved reuses some subroutines that are used for
> display as well, and those signal an error.
>
> It is never a problem with the current code because only GUI frames
> can display images.  To get TTY frames be capable of some of that
> functionality, we need changes on the C level (and perhaps also in
> Lisp), but those changes are rather mechanical -- find out which code
> signals the error and modify it to do that on some new condition, or
> not at all.

Understand.
Thank you for the explanation.