Re: Add Tango and Adwaita icons for the toolbar

[Yuan Fu <casouri@gmail.com>]

> On May 5, 2024, at 2:10 AM, Eli Zaretskii <eliz@gnu.org> wrote:
> 
>> From: Yuan Fu <casouri@gmail.com>
>> Date: Sun, 5 May 2024 00:03:05 -0700
>> Cc: Eli Zaretskii <eliz@gnu.org>,
>> emacs-devel@gnu.org
>> 
>> 
>> 
>>> On May 4, 2024, at 11:41 PM, Po Lu <luangruo@yahoo.com> wrote:
>>> 
>>> Eli Zaretskii <eliz@gnu.org> writes:
>>> 
>>>> What do you mean by "works fine"?  Does the tool bar resize to
>>>> accommodate the larger icons?  If not, what happens?
>>> 
>>> The NS and GTK toolbars resize icons to fit in themselves, and as such
>>> their users are not in a position to notice problems arising from
>>> inconsistently proportioned (or oversized) tool-bar icons.
>> 
>> And we actually want the icons to be “oversized” so they still look crisp on high-res displays.
> 
> I don't understand what that means in practice, sorry.  How do I tell
> whether my display is high-res (it probably isn't), and what will
> happen if it isn't, when using these icons?

That’s what we need to figure out. Ideally we want to use 64x64 images for high-res displays, and 32x32 for normal displays, and on both displays the icons should have the same physical size on the glass. On NS port this seems to work automatically: you give it 64x64 images and the system scales them to fit the toolbar. We need to figure out what needs to be done for GTK and other term for the icons to look good and have the right size.

> My point is that if these icons need the tool bar to resize, that will
> have two adverse effects:

The tool bar keeps its size, and resizes the icons to fit in the tool bar, not the other way around (at least on NS port, on other ports we want to achieve the same effect)

Yuan