Korean text rendering

[Sung-Jae, Cho]

Thanks for the information. :)

Additionally, I'll test with an Intel HD Graphics 620 notebook, too.

On Thu, May 15, 2025 at 5:09 PM Igor Mironchik <igor.mironchik at gmail.com>
wrote:

> On 15.05.2025 10:44, Sung-Jae, Cho wrote:
>
> I'll try again with openSUSE Tumbleweed. :)
> Please, wait a day. I'll try with virtual machines and real machines, both.
> And if you can bring some hardware information with a video card driver,
> xorg-driver, etc,
> it'll be helpful for finding the cause.
>
> Operating System: openSUSE Tumbleweed 20250512 KDE Plasma Version: 6.3.5
> KDE Frameworks Version: 6.14.0 Qt Version: 6.9.0 Kernel Version:
> 6.14.5-1-default (64-bit) Graphics Platform: X11 Processors: 4 × Intel®
> Core™ i5-7200U CPU @ 2.50GHz Memory: 7,6 GiB of RAM Graphics Processor:
> llvmpipe Manufacturer: HP Product Name: HP ProBook 640 G3
>
> Extended renderer info (GLX_MESA_query_renderer):
>
> Vendor: Intel (0x8086)
>
> Device: Mesa Intel(R) HD Graphics 620 (KBL GT2) (0x5916)
>
> Version: 25.0.5
>
> Accelerated: yes
>
> Video memory: 3909MB
>
> Unified memory: yes
>
> Preferred profile: core (0x1)
>
> Max core profile version: 4.6
>
> Max compat profile version: 4.6
>
> Max GLES1 profile version: 1.1
>
> Max GLES[23] profile version: 3.2
>
> OpenGL vendor string: Intel
>
> OpenGL renderer string: Mesa Intel(R) HD Graphics 620 (KBL GT2)
>
> OpenGL core profile version string: 4.6 (Core Profile) Mesa 25.0.5
>
> OpenGL core profile shading language version string: 4.60
>
> OpenGL core profile context flags: (none)
>
> OpenGL core profile profile mask: core profile
>
> EGL driver name: iris
>
> EGL_MESA_image_dma_buf_export, EGL_MESA_query_driver,
>
> EGL driver name: iris
>
> EGL_MESA_gl_interop, EGL_MESA_image_dma_buf_export, EGL_MESA_query_driver,
>
> EGL driver name: iris
>
> EGL_MESA_image_dma_buf_export, EGL_MESA_query_driver,
>
> EGL driver name: iris
>
> EGL_MESA_image_dma_buf_export, EGL_MESA_query_driver,
>
> EGL driver name: swrast
>
> EGL_MESA_image_dma_buf_export, EGL_MESA_query_driver,
>
>
> On Thu, May 15, 2025 at 4:38 PM Igor Mironchik <igor.mironchik at gmail.com>
> wrote:
>
>>
>> On 15.05.2025 08:49, Konstantin Kharlamov wrote:
>> > On Thu, 2025-05-15 at 08:37 +0300, Igor Mironchik wrote:
>> >> On 15.05.2025 08:29, Konstantin Kharlamov wrote:
>> >>> On Thu, 2025-05-15 at 06:29 +0300, Igor Mironchik wrote:
>> >>>> Hi.
>> >>>>
>> >>>> Are any Korean here? I'm curious if they have very bad
>> >>>> performance of
>> >>>> rendering Korean text in any Qt application? Or is this just
>> >>>> because
>> >>>> of
>> >>>> missing some fonts on my system? I see a huge performance
>> >>>> slowdown on
>> >>>> Korean text rendering.
>> >>> How did you measure? I'm not a Korean, but I tried pasting a Korean
>> >>> wiki article to Kate with "Droid Sans [1ASC]" font and scrolling
>> >>> and I
>> >>> don't see any change in performance. Perhaps some more scientific
>> >>> method required.
>> >>
>> >> I paste in Kate a Korean text (~1kB), it took so much time to paste
>> >> and
>> >> render it (~5 seconds), and Kate starts to think a lot even on
>> >> navigating in menu.
>> >>
>> >> The same with English or Russian text - I don't see any delays, Kate
>> >> is
>> >> responsive.
>> > I see. Seems something specific to your system — I just created a 158K
>> > text file by copy-pasting a Korean Wiki article a dozen of times, and
>> > when I open it in Kate, everything is smooth and nice.
>> >
>> > Is it maybe the font? What font do you use? Can you try going to Kate
>> > settings and changing the font to "Droid Sans [1ASC]" (on Archlnux it's
>> > a `ttf-droid` package) and seeing if that makes any difference?
>>
>> I guess too this is system specific. I'm on openSUSE Tumbleweed.
>> Changing editor's font to Droid Sans doesn't help.
>>
>> Ok. I see that this issue is system specific, so my question is
>> answered. Maybe somebody can check this issue on Tumbleweed only?
>>
>> Thank you.
>>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.kde.org/pipermail/kde-devel/attachments/20250515/b76b0e38/attachment-0001.htm>