Bug 469393

Summary:	Titlebar tooltips rendered with transparency issues in their left corners
Product:	[Plasma] kwin	Reporter:	deadmeu <deadmeu>
Component:	decorations	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED FIXED
Severity:	minor	CC:	nate
Priority:	NOR
Version First Reported In:	5.27.3
Target Milestone:	---
Platform:	Arch Linux
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:
Attachments:	Example 1: Clean tooltip left side Example 2: Ugly tooltip left side Example 3: Clean tooltip right side Example 4: Ugly tooltip right side

Description deadmeu 2023-05-05 17:44:02 UTC

SUMMARY
The tooltips from a window's titlebar are rendered with transparency issues around the corners. Normally they are cleanly rounded but for some reason any from the titlebar itself are not. The appearance is very slightly different depending on where the tooltip appears on the screen which leads me to believe it might be a graphics related bug potentially specific to my hardware.

STEPS TO REPRODUCE
1. Open any window
2. Hover the cursor over an element to produce a tooltip
3. Look at the corners of the tooltip and observe that they are not perfectly round with soft edges but instead contain miscoloured pixels.

SOFTWARE/OS VERSIONS
Operating System: Arch Linux 
KDE Plasma Version: 5.27.4
KDE Frameworks Version: 5.105.0
Qt Version: 5.15.9
Kernel Version: 6.3.1-arch1-1 (64-bit)
Graphics Platform: Wayland
Graphics Processor: AMD Radeon RX 7900 XT

Comment 1 deadmeu 2023-05-05 17:44:47 UTC

Created attachment 158724 [details]
Example 1: Clean tooltip left side

Comment 2 deadmeu 2023-05-05 17:45:06 UTC

Created attachment 158725 [details]
Example 2: Ugly tooltip left side

Comment 3 deadmeu 2023-05-05 17:45:24 UTC

Created attachment 158726 [details]
Example 3: Clean tooltip right side

Comment 4 deadmeu 2023-05-05 17:45:40 UTC

Created attachment 158727 [details]
Example 4: Ugly tooltip right side

Comment 5 deadmeu 2023-05-05 17:48:52 UTC

I've attached some example images to illustrate the issue.
- Examples 1 and 3 are "clean" demonstrating the correct appearance. These tooltips come from Dolphin.
- Examples 2 and 4 are "ugly" and come from the top-most portion of the titlebar, hovering over the top-left icon and top-right close window button. If you zoom into the images you'll notice the discolouration in the corners.

Comment 6 deadmeu 2023-08-04 08:19:04 UTC

Closing as this no longer appears to be an issue