HiDPi Support

[ruuda]

Description

When I tried Spacemacs, suddenly everything looked tiny. The regular Emacs looked fine. I use a HiDPi desktop environment (Gnome 3).

Reproduction guide

• Clone the repository to ~/.emacs.d.
• Ensure that ~/.emacs does not exist.
• Start Emacs.

Observed behaviour:
All text is tiny. The size is likely correct for low-dpi monitors, but not for my high-dpi setup. Note that plain Emacs worked fine (not too small text size) out of the box. See also the screenshot. For comparison I added Vim, which has a decent text size.

Expected behaviour:
Text should be legible. On a high-dpi screen that means more pixels to get the same size.

System Info

• OS: gnu/linux
• Emacs: 24.5.1
• Spacemacs: 0.105.19
• Spacemacs branch: master (rev. 3274e7d)
• Graphic display: t
• Distribution: spacemacs
• Editing style: vim
• Completion: helm
• Layers:

(emacs-lisp)

[emidln]

I have a 3840x2160 resolution on a 15.6" screen. I use :size 28 and
:powerline-scale 1.6`in my dotspacemacs-default-font config inside
.spacemacs and dospacemacs/init.

On Fri, May 6, 2016 at 12:34 PM, Ruud van Asseldonk <
notifications@github.com> wrote:

Description

When I tried Spacemacs, suddenly everything looked tiny. The regular Emacs
looked fine. I use a HiDPi desktop environment (Gnome 3).
Reproduction guide

• Clone the repository to ~/.emacs.d.
• Ensure that ~/.emacs does not exist.
• Start Emacs.

Observed behaviour:
All text is tiny. The size is likely correct for low-dpi monitors, but not
for my high-dpi setup. Note that plain Emacs worked fine (not too small
text size) out of the box. See also the screenshot. For comparison I added
Vim, which has a decent text size.

[image: spacemacs]
https://cloud.githubusercontent.com/assets/506953/15081077/3b39b262-13c1-11e6-8c35-b120b5244f4c.png

Expected behaviour:
Text should be legible. On a high-dpi screen that means more pixels to get
the same size.
System Info

• OS: gnu/linux
• Emacs: 24.5.1
• Spacemacs: 0.105.19
• Spacemacs branch: master (rev. 3274e7d
  3274e7d
  )
• Graphic display: t
• Distribution: spacemacs
• Editing style: vim
• Completion: helm
• Layers:

(emacs-lisp)

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#6005

[abcdw]

Commented :size keyword and set org.gnome.desktop.interface scaling-factor 2.
It works for me.

   dotspacemacs-default-font '("Ubuntu Mono"
                              ;; :size 18
                              :weight normal
                              :width normal
                              :powerline-scale 1.1)

[jody-frankowski]

I have the same problem with a 3840x2160 screen. If I disable the size attribute, emacs automatically selects size 22. Shouldn't the size attribute be disabled by default and let emacs figure out the best one base on scaling factors?

[d12frosted]

Initial question was answered.

[dniku]

@abcdw's solution works with the default Source Code Pro as well.

   dotspacemacs-default-font '("Source Code Pro"
                              ;; :size 18
                              :weight normal
                              :width normal
                              :powerline-scale 1.1)

[spazm]

Setting size with a floating point value uses point values which scale with display resolution scaling.

Thank you to whomever updated the documentation comments in the .spacemacs file:

;; Default font or prioritized list of fonts. The `:size' can be specified as
;; a non-negative integer (pixel size), or a floating-point (point size).
;; Point size is recommended, because it's device independent. (default 10.0)

I have just set mine to a lovely 15.0 with source code pro, which gives me an 80 column window when using 1/2 my 4K screen.