[Libreoffice-bugs] [Bug 141265] New: Random characters appear as black boxes at certain zoom levels in windows 10.

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=141265

            Bug ID: 141265
           Summary: Random characters appear as black boxes at certain
                    zoom levels in windows 10.
           Product: LibreOffice
           Version: 6.4.6.2 release
          Hardware: x86-64 (AMD64)
                OS: Windows (All)
            Status: UNCONFIRMED
          Severity: normal
          Priority: medium
         Component: Writer
          Assignee: libreoffice-bugs at lists.freedesktop.org
          Reporter: allan.w.macdonald at gmail.com

Description:
Randomly, a character that appears normal at one zoom level, appears as a black
box at another zoom level.  In the attached example, the screen shot shows
black rectangles at zooom level 200% and normal characters at other zoom
levels.

This happens randomly to some documents and then seems to mysteriously
disappear.

Steps to Reproduce:
1. Open the example document - should open at 200%.
2. Zoom out - black boxes disappear
3. Zoom in to 200%, black boxes re-appear
4. Zoom in further, black boxes disappear agaion

Actual Results:
Black boxes appear at certain zoom levels.

Expected Results:
Black boxes should never appear at any zoom level.


Reproducible: Sometimes


User Profile Reset: No


OpenGL enabled: Yes

Additional Info:
I don't have adequate knowledge to determine if this is caused by the Graphics
Stack or Writer itself - I am leaning towards the Graphics stack but I would
rather let someone else make the determination.

Document and screenshots to follow.

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