[Libreoffice-bugs] [Bug 138332] New: Impress: embedded math-formulas with scalable brackets / symbols around fractions are rendered wrong

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=138332

            Bug ID: 138332
           Summary: Impress: embedded math-formulas with scalable brackets
                    / symbols around fractions are rendered wrong
           Product: LibreOffice
           Version: 6.4.0.0.alpha0+
          Hardware: x86-64 (AMD64)
                OS: Windows (All)
            Status: UNCONFIRMED
          Severity: normal
          Priority: medium
         Component: Impress
          Assignee: libreoffice-bugs at lists.freedesktop.org
          Reporter: soenke.koppatsch at gmx.net

Description:
Math-Formulas inserted as OLE objects into Impress are showing misaligned
scalable brackets and symbols. The wrong alignment is shown only in Impress.
Math itself and also Writer with embedded formulas does not show this behavior,
here the formula formatting is fine.
If you edit the wrong displayed formula by doubleclicking it in Impress, the
Math section opens and the formula preview rendering is also as expected.
Leaving the formula editor brings back the unusable formatting.

Steps to Reproduce:
1. start Impress
2. insert a formula: Insert -> Object -> Formula
3. inside the math section type a formula containing fractions, surrounded by
brackets or math symbols
Example:

A_x `=` left none A_0  over sqrt{1+ B over C } right rline _{ D rightarrow
infinity }

4. close the formula editor and admire the wrong rendered formula :-)

Actual Results:
The placement and line width of scaled brackets / lines, root sign ets. is
shifted to the right, overlaying other (right placed) formula parts

Expected Results:
A well rendered formula as shown in Math or Writer.


Reproducible: Always


User Profile Reset: Yes



Additional Info:
My setup: Windows 10 (x64), 24GB RAM, dual 4k-monitor
Version: 7.0.3.1 (x86)
Build ID: d7547858d014d4cf69878db179d326fc3483e082
CPU threads: 8; OS: Windows 10.0 Build 19042; UI render: default; VCL: win
Locale: de-DE (de_DE); UI: de-DE
Calc: threaded

The last version not showing this problem was Libreoffice 6.0.7. Update to
higher version was neccessary after upgrading from FHD- to 4k monitor
(2560x1440). Impress 6.0 was killed by another bug (presenting slides on hires
monitor results in black screen with only small slide portions).

The wrong formula rendering was noticed on version 6.4 and still remains on
7.0.3.1, with and without OpenGL / Skia.
Did not test the versions between 6.0 and 6.4.

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