GNU bug report logs - #51596
image-transform-resize has inconsistent semantics wrt scaling up/down

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Message #23 received at 51596 <at> debbugs.gnu.org (full text, mbox):

From: Stefan Kangas <stefan <at> marxist.se>
To: Juri Linkov <juri <at> linkov.net>
Cc: Lars Ingebrigtsen <larsi <at> gnus.org>, 51596 <at> debbugs.gnu.org
Subject: Re: bug#51596: image-transform-resize has inconsistent semantics wrt
 scaling up/down
Date: Thu, 4 Nov 2021 13:19:40 -0700

Juri Linkov <juri <at> linkov.net> writes:

>>>> I made a quick review of other image viewers:
>>>>
>>>> emacs                  gthumb          geeqie                eog
>>>> -----                  ------          ------                ---
>>>> fit height and width   Automatic       Zoom 1:1              Best fit
>>>> <missing>              Fit to window   Fit image to window   <missing>
>>>
>>> What is “Fit to window”?  Does it distort the image
>>> by changing its height/width ratio?
>>
>> No, it preserves the aspect ratio.
>
> What is the difference between “Automatic” and “Fit to window”?

In gthumb, "Automatic" is like our "fit height and width" in that it
only scales down as needed, while "Fit to window" scales both up and
down.

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