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: 2023-12-16 03:13 UTC (History)
1 user (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
View All Add an attachment (proposed patch, testcase, etc.)

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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)