Bug 467890

Summary:	On Wayland, when taking a no-delay rectangular region or full screen screenshot from the main window, a ghost of the main window can appear in the screenshot when using a slower-than-normal global animation speed
Product:	[Applications] Spectacle	Reporter:	Nate Graham <nate>
Component:	General	Assignee:	Boudhayan Gupta <me>
Status:	RESOLVED FIXED
Severity:	normal	CC:	bugseforuns, kde
Priority:	NOR
Version:	23.03.80
Target Milestone:	---
Platform:	Other
OS:	Linux
See Also:	https://bugs.kde.org/show_bug.cgi?id=476811
Latest Commit:	https://invent.kde.org/plasma/kwin/commit/b090a7cc9e3b2a70e88c47b5fb6add8599bc7c0d	Version Fixed In:
Sentry Crash Report:

Description Nate Graham 2023-03-28 17:39:44 UTC

STEPS TO REPRODUCE
1. Be in a Wayland session
2. Reduce the global animation speed in System Settings > Quick Settings page > Animation speed slider
3. Launch Spectacle
4. With Spectacle's main window open, take a rectangular region or full screen screenshot


OBSERVED RESULT
The main window fades out, but does not fade out fast enough to avoid a ghostly transparent version of it appearing in the screenshot


EXPECTED RESULT
The screenshot is taken only once the main window's close animation has finished playing


ADDITIONAL INFORMATION
Can be worked around by using the standard animation duration or a faster one, or by setting any delay value. Even a 0.1 second delay is enough for me.

Comment 1 Bug Janitor Service 2023-04-11 16:41:53 UTC

A possibly relevant merge request was started @ https://invent.kde.org/plasma/kwin/-/merge_requests/3961

Comment 2 Noah Davis 2023-04-11 19:23:12 UTC

Git commit 616783d892db0410497356409698a81311610fc6 by Noah Davis.
Committed on 11/04/2023 at 19:11.
Pushed by ndavis into branch 'master'.

Blacklist Spectacle for all window open/close effects

Spectacle needs to be blacklisted in order to stay out of its own
screenshots.
Related: bug 463105, bug 465784

M  +5    -1    src/effects/fade/package/contents/code/main.js
M  +3    -0    src/effects/glide/glide.cpp
M  +5    -1    src/effects/scale/package/contents/code/main.js

https://invent.kde.org/plasma/kwin/commit/616783d892db0410497356409698a81311610fc6

Comment 3 Noah Davis 2023-04-11 19:23:42 UTC

Git commit b090a7cc9e3b2a70e88c47b5fb6add8599bc7c0d by Noah Davis.
Committed on 11/04/2023 at 19:23.
Pushed by ndavis into branch 'Plasma/5.27'.

Blacklist Spectacle for all window open/close effects

Spectacle needs to be blacklisted in order to stay out of its own
screenshots.
Related: bug 463105, bug 465784


(cherry picked from commit 616783d892db0410497356409698a81311610fc6)

M  +5    -1    src/effects/fade/package/contents/code/main.js
M  +3    -0    src/effects/glide/glide.cpp
M  +5    -1    src/effects/scale/package/contents/code/main.js

https://invent.kde.org/plasma/kwin/commit/b090a7cc9e3b2a70e88c47b5fb6add8599bc7c0d