https://bugs.kde.org/show_bug.cgi?id=422157
Bug ID: 422157
Summary: Canvas acceleration turns overlapping Assistants a
black square on certain zooming level (Win/Mac only)
Product: krita
Version: 4.3.0-beta1
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: Tool/Assistants
Assignee: krita-bugs-n...@kde.org
Reporter: tyson...@tysontan.com
Target Milestone: ---
Created attachment 128851
--> https://bugs.kde.org/attachment.cgi?id=128851&action=edit
Sample file where Canvas acceleration makes overlapping Assistants turn black
on certain zooming level
If Canvas Graphics Acceleration is ON, when there are two overlapping
Concentric Ellipse Assistants on the canvas, Zooming in to certain level
(ranges, close to 100%, or 50%) turns the assistants into a black square.
This is a bug relayed from the community. The original reporter is using macOS.
I wasn't able to reproduce it on Linux, but we were able to reproduce it on
Windows 10 1909 and 2004, happened on all intel/AMD/Nvidia GPUS. The only
workaround is to turn off Canvas Graphics Acceleration. When Acceleration is
checked, using Software Renderer will still trigger the same black square.
I attached the sample file the original reporter created.
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