TileSet editor toolbar icons look blurry on non-HiDPI monitor

[timothyqiu]

Godot version: 3.2.3 beta 1 ~ rc 5

OS/device including version:
MacBook Pro (Retina, 13-inch, Early 2015)
Intel Iris Graphics 6100 1536 MB

Issue description:

When using both a non-HiDPI and a HiDPI monitor and the Godot Editor is on the non-HiDPI one, the same icon looks blurry on TileSet toolbar buttons, but sharp on other buttons.

This does not happen on the HiDPI monitor, or when only the non-HiDPI monitor is used.

Snapshot on non-HiDPI monitor (the right one looks blurry):

Snapshot on HiDPI monitor (looks the same):

Steps to reproduce:

1. Use both a HiDPI monitor and a non-HiDPI monitor, and make sure that the Godot Editor is on the non-HiDPI one
2. Create a new TileSet to open the TileSet editor
3. Create a tile
4. Compare the two "trash can" icons.

Minimal reproduction project: Not project related.

[timothyqiu]

After more experiments, I think this may be related to fonts & texts.

The snapshots above is using the zh_CN locale and Noto Sans CJK SC Regular font at size 15.

With the default en locale, the two trash can buttons look differently:

• At default size 14, the icon on the toolbar looks sharper
  

• At size 17, the icon on the toolbar looks best
  

• At size 18, both the icons look blurry
  

[Calinou]

Does this occur with other editor icons or the general rendering? Check the 3D viewport's appearance with antialiasing disabled.

cc @bruvzg

[timothyqiu]

It's hard to find duplicated icons to compare the blurriness, but the first TileMap icon here is definitely sharper than the other two:

The 3D viewport's appearance is sharp. (Grid lines, gizmos, etc...)

---

Not sure if it's related, but the size of some image icons in the FileSystem panel are bigger when a HiDPI monitor is available.

With no HiDPI monitor:

With HiDPI monitor available:

[bruvzg]

It's side effect of the #40084, if there's HiDPI monitor in the system, everything is rendered at the higher resolution and downscale (by OS) for the LoDPI monitors.

[Calinou]

Can you test this with the latest master branch which includes #63957?

[timothyqiu]

Tested on alpha14, still blurry.