This is a proposal to have only SVG icons. Using SVG, which is a vector format, allows to display the icons very crisp on various different displays. This is not always possible with the icons in raster formats like PNG. As discussed in tdf#144583, the current PNG icons are displayed blurry on HiDPI displays. We also have SVG icons that are now displayed very crisp on HiDPI displays, because of the fix for the aforementioned bug. Quoting from Caolan: "Maybe for the png case it would be nicer to have the pngs available in different sizes to begin with so a suitable size would be available rather than upscaling a smaller one, or maybe svg only is the right way to go eventually." Having SVG only icons is a better approach, because of the use of fractional scaling leads to multiple/unknown icon sizes. Therefore, I suggest to deprecate PNG icons, and have only SVG icons.
But we do not use the SVG icons directly. They are currently rendered (with scaling appropriate to fractional scale of the UI -- see bug 115439) to PNG The PNG packaged look better bcz they are designed at 16px 24px and 32px--modeled against the source SVG. Resampling of the source SVG for scaling only becomes useful at fractional scaling from 150% upward. So yes to direct use of SVG. Yes to automatically switching to the os/DE appropriate SVG icon theme. But, NO to dropping the packaged PNG for UI < 150% fractional scaling.
For 100% scaling on a 1080p display it's better to use PNG icons. When I use the SVG version the icons look blurry due to resampling.
(In reply to Rafael Lima from comment #2) > For 100% scaling on a 1080p display it's better to use PNG icons. When I use > the SVG version the icons look blurry due to resampling. What is your operating system? Caolan recently fixed such a problem for Linux/gtk in tdf#144583. Could you please test with the latest LO master?
(In reply to Hossein from comment #3) > (In reply to Rafael Lima from comment #2) > > For 100% scaling on a 1080p display it's better to use PNG icons. When I use > > the SVG version the icons look blurry due to resampling. > What is your operating system? Caolan recently fixed such a problem for > Linux/gtk in tdf#144583. > > Could you please test with the latest LO master? Uh, no he didn't. Status quo, the SVG would be converted to PNG directly but not scaled. Exactly the reason the bundled PNG (optimized by the graphics designer) for use at 100% unscaled UI. An SVG "converted"/"resampled" to PNG at the 16px/24px/32px resolution needed by the unscaled UI, i.e. 100% will always look inferior to a directly edited PNG at those sizes/scale.
Created attachment 182471 [details] Screenshot with blurry icons Hi Houssein, I tested with today's master build and the icons still look blurry on my 1920 x 1080 display. See attached screenshot pointing to some blurry icons. I'm using Kubuntu 22.04 (KDE Plasma 5.25.5). Tested with Version: 7.5.0.0.alpha0+ / LibreOffice Community Build ID: 35702fd6781542f5eefbd3710304ab9a25ac61fe CPU threads: 16; OS: Linux 5.15; UI render: default; VCL: kf5 (cairo+xcb) Locale: pt-BR (pt_BR.UTF-8); UI: en-US Calc: threaded
(In reply to Rafael Lima from comment #5) > Hi Houssein, I tested with today's master build and the icons still look > blurry on my 1920 x 1080 display. See attached screenshot pointing to some > blurry icons. The PNG icons, or the SVG icons or both?
(In reply to V Stuart Foote from comment #4) > > Caolan recently fixed such a problem for > > Linux/gtk in tdf#144583. > > Could you please test with the latest LO master? > Uh, no he didn't. Status quo, the SVG would be converted to PNG directly > but not scaled. Exactly the reason the bundled PNG (optimized by the > graphics designer) for use at 100% unscaled UI. > > An SVG "converted"/"resampled" to PNG at the 16px/24px/32px resolution > needed by the unscaled UI, i.e. 100% will always look inferior to a directly > edited PNG at those sizes/scale. It is possible to have very low-res "16px/24px/32px" icons to use wherever needed, and rasterize SVG elsewhere. Btw, if the rasterization routines are problematic and produce low quality results, why not fix them to achieve better results? If the graphical back-ends can render SVG themselves, asking them to render would be much better. If that's what you meant by "direct use of SVG", I agree with you that it would be better.
(In reply to V Stuart Foote from comment #6) > The PNG icons, or the SVG icons or both? The SVG icons look blurry, even with the latest master build. PNG icons look crispy.
(In reply to Rafael Lima from comment #8) > The SVG icons look blurry, even with the latest master build. PNG icons look > crispy. Yes, and that is to be expected. Automated downscale resampling of SVG into PNG icons can not match quality of PNG icon theme hand edited for use in UI at 100%. The SVG icon theme are only appropriate as the UI scaling factor increases and the need for higher resolution icons emerges to avoid pixilation. Using SVG icons in the UI with no scaling or minimal 1.25x scaling results in icon theme that seems "smeared" compared to the bundled PNG icon themes appropriate for the resolution.
Caolan, what do you think about this issue?
something like gnome provides icons in some pixel sizes and then a scalable version, e.g. $ ls /usr/share/icons/Adwaita/ 16x16 22x22 24x24 256x256 32x32 48x48 512x512 64x64 8x8 96x96 scalable an arrangement like that sounds plausible to me, bundle say "colibre" and "colibre_svg" together into a single "colibre" zip/package with a "scalable" subdir of the svg version and a 32x32 (?) of the png version. And prefer a concrete pixel version if its present and is at the requested size while use the scalable one if the requested size is larger.
I remember that LO had some problems with the SVG->PNG icon converting. I mean LibreOffice doesn't show the SVG icons directly, first it converts SVG to PNG Tomaz, what do you think today about the suggestion? Is there today some technical reason to have PNG icon themes and don't use only SVG for all icons?
(In reply to Roman Kuznetsov from comment #12) > I remember that LO had some problems with the SVG->PNG icon converting. I > mean LibreOffice doesn't show the SVG icons directly, first it converts SVG > to PNG > > Tomaz, what do you think today about the suggestion? Is there today some > technical reason to have PNG icon themes and don't use only SVG for all > icons? I don't think anything changed. There are some bugs that need discovering and fixing in the SVG importer, drawinglayer, outputdevice, backend to get rendering sizes correctly.