>From: Jehan Pagès <jehan.marmott...@gmail.com>
>Sent: 21 February 2016 17:24
>To: Kevin Payne
Subject: Re: [Gimp-developer] Icon sizes required
On Sun, Feb 21, 2016 at 1:23 PM, Kevin Payne <payn...@hotmail.com> wrote:
> But that is partly my point - The original icons are apparently the wrong
> size, so my question stands: How to determine what sizes are required?
>I had already noticed this discrepancy in our code. We are actually
>requesting for a GTK_ICON_SIZE_BUTTON which is 20x20 in GTK+2
>(interestingly in GTK+3, it is a 16x16). Yet the icons in the legacy
>color icon theme are 22x22 (not 24x24); and since the default
>acceptable "threshold" is 2 pixels, when requesting a 24x24 icons,
>GTK+ gets the available 22x22 tool icons instead.
>I'm not sure icons are actually re-scaled though. I think GTK+ simply
>uses the smaller 22x22 icons as is, instead of the expected 24x24,
>that's all. Not trying forcingly to match expectations. Though I
>actually wondered as well, since if they were in fact rescaled, that
>basically means our default theme had been providing definitely
>not-pixel-perfect all along.
Just to be clear, I'm only referring to the gimp-gravity-* icons when I say
they are 24x24
As for scaling - in 2.8, I agree that scaling doesn't take place and that icons
are used the size they are provided at, which is where the problem in this bug
comes in: https://bugzilla.gnome.org/show_bug.cgi?id=739469
However in 2.9, using the icon theme mechanism, if an icon isn't provided at
the required size (+/- the tolerance, thanks I didn't know about that) then
scaling of a different size is performed: http://imgur.com/98D3SLA
And the size of the GTK named sizes is still controlled by the theme (until the
change to GTK3):
gtk-icon-sizes = "panel-menu=10,10 : panel=10,10 : gtk-button=20,20 :
gtk-large-toolbar=24,24 : gtk-menu=16,16 : gtk-small-toolbar=18,18 :
gtk-dnd=32,32 : gtk-dialog=48,48"
So it's outside the control of the creator of the icon theme.
At this point I think I might have to give up on the idea of pixel aligned
icons as it looks like the icon theme mechanism is creating an unmanageable
mess, which is a pity because it's a nice idea.
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