[Libreoffice-bugs] [Bug 112492] New: font rendering got worse looking in 5.3.2.2 ( for Default rendering, OpenGL not affected)

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=112492

            Bug ID: 112492
           Summary: font rendering got worse looking in 5.3.2.2 (for
                    Default rendering, OpenGL not affected)
           Product: LibreOffice
           Version: 5.3.2.2 release
          Hardware: All
                OS: Windows (All)
            Status: UNCONFIRMED
          Severity: major
          Priority: medium
         Component: LibreOffice
          Assignee: libreoffice-bugs at lists.freedesktop.org
          Reporter: xiscofauli at libreoffice.org

Created attachment 136365
  --> https://bugs.documentfoundation.org/attachment.cgi?id=136365&action=edit
Detailed comparison of 5.4.1.2 and 5.3.1.2

This is a follow-up bug of bug 106990 as this has grown so much it's impossible
to follow.

Commit
http://cgit.freedesktop.org/libreoffice/core/commit/?id=a5a3e82e99e7a60ec65c339dd0463af5c680cead
might has improved the issue to some users but not to all.

On the other hand, the issue in Impress slide rendered with GPU "Use hardware
acceleration" is open as bug 107090

Text from https://bugs.documentfoundation.org/show_bug.cgi?id=106990#c90:

Ok, here is a more detailed comparison with options separately
enabled/disabled. Caution: The screenshots incorrectly say "5.4.2.1", but
"5.4.1.2" is correct!
The results are as follows:

LibreOffice 5.4.1.2 (current release)
a) OpenGL off:
- Rendering is ugly and blurry (both UI and in-document)
- "Hardware acceleration" on/off has no effect
- "Anti-aliasing" on/off has no effect
b) OpenGL on:
- Rendering is slightly different (but still ugly and blurry)
- Horizontal ruler: Different rendering of vertical lines
- "Hardware acceleration" is disabled
- "Anti-aliasing" on/off has no effect

LibreOffice 5.3.1.2 (last known good)
a) OpenGL off:
- Rendering is crispy and sharp (both UI and in-document)
- "Hardware acceleration" on/off has no effect
- "Anti-aliasing" on/off has no effect
b) OpenGL on:
- Rendering is ugly and blurry as in 5.4.1.2 (no extra screenshots)

So the only way to get sharp rendering is to (1) use LO before 5.3.2 and (2)
disable OpenGL (which has always been ugly and blurry, as already said in my
previous comments).

However, I couldn't observe any specific differences caused by hardware
acceleration, anti-aliasing, or between UI and in-document content.

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