Bug 158725 - LibreOffice 7.5.0 and newer renders text less accurate and slower (Windows 7)
Summary: LibreOffice 7.5.0 and newer renders text less accurate and slower (Windows 7)
Status: UNCONFIRMED
Alias: None
Product: LibreOffice
Classification: Unclassified
Component: Writer (show other bugs)
Version:
(earliest affected)
7.5.0.3 release
Hardware: x86-64 (AMD64) Windows (All)
: medium normal
Assignee: Not Assigned
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2023-12-15 20:11 UTC by Alexey
Modified: 2025-07-04 07:24 UTC (History)
3 users (show)

See Also:
Crash report or crash signature:


Attachments
LibreOffice v7.4.7 screenshot. (70.14 KB, image/png)
2023-12-15 20:13 UTC, Alexey
Details
LibreOffice v7.5.0 screenshot. (73.34 KB, image/png)
2023-12-15 20:14 UTC, Alexey
Details
Sample document (510.62 KB, application/vnd.oasis.opendocument.text)
2023-12-15 23:32 UTC, Alexey
Details

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Description Alexey 2023-12-15 20:11:23 UTC
I use LibreOffice in Windows 7 SP1 (x64).

LibreOffice 7.5.x and 7.6.x renders font worse then LibreOffice 7.4.x. Also it works much slower on scrolling and window resizing.

I assume, in version 7.5.0 you have changed font rendering method and it caused both issues: with quality and performance.
Comment 1 Alexey 2023-12-15 20:13:20 UTC
Created attachment 191447 [details]
LibreOffice v7.4.7 screenshot.
Comment 2 Alexey 2023-12-15 20:14:48 UTC
Created attachment 191448 [details]
LibreOffice v7.5.0 screenshot.
Comment 3 Alexey 2023-12-15 20:19:02 UTC
Note: Skia disabled. Hardware acceleration and anti-aliasing enabled, but I don't see any effects from these options.
Comment 4 Stéphane Guillou (stragu) 2023-12-15 22:29:42 UTC
Can you please point more precisely to what the difference is? I can't see it.
And it would help if you could share an example document.
Comment 5 Alexey 2023-12-15 23:32:21 UTC
Created attachment 191451 [details]
Sample document
Comment 6 Alexey 2023-12-15 23:49:10 UTC
Letters in new versions looks more bold at all, but it's weight not same. For example, first word in first visible paragraph in my screenshots - "Decorators" (not header). Vertical lines of "r" and "t" letter looks same weight in LibreOffice 7.4.7, but "r" looks bolder, then "t" in 4.5.0. And its border less accurate.

This propably can be not that visible at high monitor resolutions. I use 1280x720.

What about performance, there just high delays when I scroll document or resize window.

My CPU: QuadCore Intel Core 2 Quad, 2333 MHz
Video Card: NVIDIA GeForce GTX 295
Comment 7 Alexey 2023-12-15 23:55:21 UTC
> I use 1280x720.
I.e. 1280x1024.
Comment 8 QA Administrators 2023-12-16 03:13:15 UTC Comment hidden (obsolete)
Comment 9 zcrhonek 2024-11-15 15:47:38 UTC
Please note that Windows 7 will be unsupported in next versions https://wiki.documentfoundation.org/ReleaseNotes/25.2#Feature_Removal_/_Deprecation
Comment 10 Alexey 2024-11-16 17:11:50 UTC
zcrhonek,

There 2 paragraphs about Windows 7 support in that article:
1) Extensions and features relying on Python will not work on Windows 7. <...>
2) Support for Windows 7 and 8/8.1 will be removed in version 25.8.
I'm not sure, what exactly will be unsupported, but it more looks like only Python-based extensions. Otherwise first paragraph almost useless.
Comment 11 Buovjaga 2024-12-29 15:55:12 UTC
Support for Windows 7, 8 and 8.1 has now been removed: https://wiki.documentfoundation.org/ReleaseNotes/25.8#Platform_Compatibility

Is this issue seen with Win 10 or 11?
Comment 12 QA Administrators 2025-06-28 03:12:37 UTC Comment hidden (obsolete)
Comment 13 Buovjaga 2025-06-28 13:22:18 UTC
(In reply to Buovjaga from comment #11)
> Support for Windows 7, 8 and 8.1 has now been removed:
> https://wiki.documentfoundation.org/ReleaseNotes/25.8#Platform_Compatibility
> 
> Is this issue seen with Win 10 or 11?

Alexey: you changed the status to unconfirmed, but did not reply to this question, so I'm setting this back to needinfo.
Comment 14 Alexey 2025-06-30 21:19:40 UTC
I checked LibreOffice v25.2.4 with both Windows 7 and Windows 11. When Skia disabled, font rendering quality become good again, but scrolling document still too slow. When Skia enabled, scrolling works fast, but font rendering looks bad.

Old versions (7.4.7 and 7.5.0) works same on Windows 7 and Windows 11: rendering is good and fast in 7.4.7, bad and slow in 7.5.0 (and with Skia quality even worse).
Comment 15 Buovjaga 2025-07-01 06:20:04 UTC
(In reply to Alexey from comment #14)
> I checked LibreOffice v25.2.4 with both Windows 7 and Windows 11. When Skia
> disabled, font rendering quality become good again, but scrolling document
> still too slow. When Skia enabled, scrolling works fast, but font rendering
> looks bad.
> 
> Old versions (7.4.7 and 7.5.0) works same on Windows 7 and Windows 11:
> rendering is good and fast in 7.4.7, bad and slow in 7.5.0 (and with Skia
> quality even worse).

Thanks for testing. I added an interesting report to See Also. Skia will soon become the only renderer on Windows: https://gerrit.libreoffice.org/c/core/+/187176
Comment 16 Buovjaga 2025-07-03 14:44:16 UTC
Alexey: a fix was made to Skia text rendering: bug 166339

You can test it with Win-x86_64@tb77-TDF from https://dev-builds.libreoffice.org/daily/master/current.html
Comment 17 Alexey 2025-07-03 23:36:20 UTC
(In reply to Buovjaga from comment #16)
> Alexey: a fix was made to Skia text rendering: bug 166339
> 
> You can test it with Win-x86_64@tb77-TDF from
> https://dev-builds.libreoffice.org/daily/master/current.html

Rendering quality not bad or even good. Scrolling document is somewhat slow. It faster than versions 7.5.0 - 25.2 with GDI, but slower than 25.2 with Skia or 7.4.7 with any renderer.
Comment 18 Buovjaga 2025-07-04 07:24:47 UTC
(In reply to Alexey from comment #17)
> (In reply to Buovjaga from comment #16)
> > Alexey: a fix was made to Skia text rendering: bug 166339
> > 
> > You can test it with Win-x86_64@tb77-TDF from
> > https://dev-builds.libreoffice.org/daily/master/current.html
> 
> Rendering quality not bad or even good. Scrolling document is somewhat slow.
> It faster than versions 7.5.0 - 25.2 with GDI, but slower than 25.2 with
> Skia or 7.4.7 with any renderer.

We should focus on one issue per report, actually. Is the rendering quality better than before?