Cat and Rainbow does not scale well on Emacs 27

[tusooa]

On Emacs 27 the rainbow segments have visible spaces between them, and the rainbow is significantly higher than the cat.

[RushanKhan1]

nyan-mode works perfectly when I use 1.00x scaling but when I increase the scaling I face this same problem.

[RushanKhan1]

I kinda found a way to make it somewhat better, locally. All you need to do Is resize all of the xpm images equally in the img folder to suit your particular scaling.

[andreyyao]

Are you launching emacs server as systemd service? I have the same problem, but the cat size appears to be normal when I launch emacs from my distro's application menu instead of as systemd OS: 5.16.18-1-MANJARO Emacs: 28.1 with native compilation

[tusooa]

Are you launching emacs server as systemd service? I have the same problem, but the cat size appears to be normal when I launch emacs from my distro's application menu instead of as systemd OS: 5.16.18-1-MANJARO Emacs: 28.1 with native compilation

I don't have systemd.

[andreyyao]

Found a band-aid fix.

The issue is that in nyan.el, for some reason when the .xpm images are created in nyan-cat-image and nyan-animation-frames, the scaling wasn't automatically inferred by create-image even though it's supposed to.

Fix: add the following code to init file after the lines where you (nyan-mode t):

  (setq nyan-cat-image
        (create-image nyan-cat-face-image 'xpm nil :scale 2 :ascent 'center))
  (setq nyan-animation-frames
        (mapcar
	 (lambda (id)
           (create-image (concat nyan-directory (format "img/nyan-frame-%d.xpm" id))
                         'xpm nil :scale 2 :ascent 95))
         '(1 2 3 4 5 6)))