Bug 1470808 - Fonts in GNOME Shell are rendered very poorly in Wayland compared to Xorg
Fonts in GNOME Shell are rendered very poorly in Wayland compared to Xorg
Status: NEW
Product: Fedora
Classification: Fedora
Component: gnome-shell (Show other bugs)
26
x86_64 Linux
unspecified Severity medium
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Assigned To: Owen Taylor
Fedora Extras Quality Assurance
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Reported: 2017-07-13 13:42 EDT by Saurav Sengupta
Modified: 2017-08-05 05:54 EDT (History)
2 users (show)

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Attachments (Terms of Use)
GNOME Shell on Wayland - 01 (761.16 KB, image/png)
2017-07-13 13:42 EDT, Saurav Sengupta
no flags Details
GNOME Shell on Wayland - 02 (748.25 KB, image/png)
2017-07-13 13:42 EDT, Saurav Sengupta
no flags Details
GNOME Shell on Xorg - 01 (759.75 KB, image/png)
2017-07-13 13:43 EDT, Saurav Sengupta
no flags Details
GNOME Shell on Xorg - 02 (747.83 KB, image/png)
2017-07-13 13:43 EDT, Saurav Sengupta
no flags Details

  None (edit)
Description Saurav Sengupta 2017-07-13 13:42:08 EDT
Created attachment 1297779 [details]
GNOME Shell on Wayland - 01

Description of problem:
The fonts used in GNOME Shell are rendered very poorly in Wayland when compared to how they are rendered in Xorg. This affects only the rendering in the Shell's own UI elements, not in GTK+ windows. I have attached screenshots showing the rendering of the same elements in both Wayland and Xorg. In Wayland the fonts appear squashed and blurred, especially with RGBA rendering on LCD/LED screens. This is on an Intel 520 (Skylake GT2) GPU.

Version-Release number of selected component (if applicable):
gnome-session-wayland-session 3.24.1-2
xorg-x11-server-Xwayland 1.19.3-4
gnome-shell 3.24.2-1

How reproducible:
Always

Steps to Reproduce:
1. Select RGBA font rendering in GNOME (with font hinting slight), preferably with font size 10pt for GNOME Shell.
2. Compare the rendering of fonts in GNOME Shell on Wayland and Xorg.

Actual results:
Fonts in GNOME Shell on Wayland appear squashed and blurred compared to Xorg.

Expected results:
Fonts should look the same on both Wayland and Xorg, or at least they should not look so bad on Wayland.
Comment 1 Saurav Sengupta 2017-07-13 13:42 EDT
Created attachment 1297780 [details]
GNOME Shell on Wayland - 02
Comment 2 Saurav Sengupta 2017-07-13 13:43 EDT
Created attachment 1297781 [details]
GNOME Shell on Xorg - 01
Comment 3 Saurav Sengupta 2017-07-13 13:43 EDT
Created attachment 1297782 [details]
GNOME Shell on Xorg - 02
Comment 4 Saurav Sengupta 2017-08-05 05:54:18 EDT
Also, the fonts in the Shell elements are jagged, especially the slanted edges such as in the letters 'W', 'V', 'y', etc.

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