bug#45640: 28.0.50; Fringe icons show fixed white background on secondary display (macos)

[Li Feng]

I tested emacs master on a retina display, and it is all good. fringe icons are rendered correctly on both internal and external displays. However, on low-res external displays the fringe icon rendering is still broken.

On Wed, Jan 6, 2021 at 8:27 AM Li Feng <li.feng@snap.com> wrote:

My laptop screen is retina, but the external monitor is not.

Redisplay or resizing does not make the problem go away, icon
background remains white.


On Wed, Jan 6, 2021 at 6:51 AM Alan Third <alan@idiocy.org> wrote:
>
> On Tue, Jan 05, 2021 at 11:42:42AM +1100, Li Feng via Bug reports for GNU Emacs, the Swiss army knife of text editors wrote:
> > Hi I just rebuilt everything with latest master branch, and I can
> > still reproduce this problem.
> > It shows in all themes, including builtin themes.
> > I'm running on macos catalina 10.15.7.
>
> What are your screens like? Are either or both of them retina? If you
> force a full redisplay by, say, resizing the frame, does the problem
> remain?
> --
> Alan Third