Bug 1636691 - Zoom accessibility function causes bad rendering
Summary: Zoom accessibility function causes bad rendering
Status: NEW
Alias: None
Product: Fedora
Classification: Fedora
Component: gnome-shell   
(Show other bugs)
Version: 29
Hardware: x86_64
OS: Linux
unspecified
unspecified
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Assignee: Owen Taylor
QA Contact: Fedora Extras Quality Assurance
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Blocks:
TreeView+ depends on / blocked
 
Reported: 2018-10-06 19:58 UTC by Giovanni Grieco
Modified: 2018-11-04 13:37 UTC (History)
3 users (show)

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Attachments (Terms of Use)
This is a screenshot from Gnome Shell with settings app open and clicked on the clock to show the calendar. (1.49 MB, image/png)
2018-10-06 19:58 UTC, Giovanni Grieco
no flags Details

Description Giovanni Grieco 2018-10-06 19:58:54 UTC
Created attachment 1491175 [details]
This is a screenshot from Gnome Shell with settings app open and clicked on the clock to show the calendar.

Description of problem:
Zoom accessibility feature displays broken visual elements in the top-bar. Top-bar elements are rendered in half (only the top-half of the bar is visible) if the cursor is on top of the screen. Also tooltips and windows are not showing entirely, only portion of them.

This problem also affects GDM zoom feature.

Version-Release number of selected component (if applicable):
gnome-shell-3.30.0-9.fc29

How reproducible:
Always reproducible with gnome shell, gdm and Gnome Settings app. 

This problem does not affect other applications like firefox, rhythmbox and nautilus: these applications are rendered correctly.

Steps to Reproduce:
1. Activate zoom feature, wither from accessibility icon or via settings app
2. Move the cursor around and notice the broken elements

Actual results:
Windows, tooltips and other visual elements are not displayed correctly. It seems their rendering are limited on a rectangle near the cursor.

Expected results:
Windows, tooltips and other visual elements should be displayed correctly.

Additional info:
I tested with Fedora 28 Workstation, same setup, and the problem does not verify.


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