Re: Image transformation filter for upscaled images

[Yuri Khan]

On Wed, 10 Mar 2021 at 02:32, Lars Ingebrigtsen <larsi@gnus.org> wrote:

> Thinking a bit more about this, I wonder whether a general solution is
> kinda-sorta possible anyway.  That is, having a function that returns
> what algorithm to use.  We normally want shrinking the image to always
> use `best', and enlarging an image slightly to use `good' or `best'
> (that's the issue with doc-view, I think? we're rendering at one size
> and then enlarging it on HiDPI screens?  I haven't actually debugged
> it), and enlarging more than (say) 3x in size to use nearest
> neighbour...

Nearest-neighbor scaling when enlarging by exactly 2x feels very good, too.