Bug 352877

Summary:	[PATCH] Don't darken the image in the middle of fade transition
Product:	[Applications] okular	Reporter:	Arseniy Lartsev <receive-spam>
Component:	general	Assignee:	Okular developers <okular-devel>
Status:	RESOLVED NOT A BUG
Severity:	normal	CC:	justin.zobel
Priority:	NOR
Version First Reported In:	0.23.0
Target Milestone:	---
Platform:	Compiled Sources
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:
Attachments:	The patch The patch Test case (two blank pages, 0.5s long fade transition)

Description Arseniy Lartsev 2015-09-18 14:08:54 UTC

Right in the middle of the fade transition, the previous and the next slide are painted each with 50% opacity on top of black background. This means that the black background will be slightly visible, which it shouldn't be. I propose a patch to fix this.


Reproducible: Always

Steps to Reproduce:
1. Open a PDF with blank white pages and fade transitions
2. Start a presentation
3. Switch between the pages

Actual Results:  
The screen goes from white to light gray to white

Expected Results:  
The screen stays white

Comment 1 Arseniy Lartsev 2015-09-18 14:09:17 UTC

Created attachment 94631 [details]
The patch

Comment 2 Arseniy Lartsev 2015-09-18 14:10:12 UTC

Created attachment 94632 [details]
The patch

Comment 3 Arseniy Lartsev 2015-09-27 19:34:39 UTC

Created attachment 94747 [details]
Test case (two blank pages, 0.5s long fade transition)

Comment 4 Justin Zobel 2020-11-08 03:42:34 UTC

Please submit any patches if still relevant to https://invent.kde.org/graphics/okular/-/merge_requests/ thank you.