https://bugs.documentfoundation.org/show_bug.cgi?id=157153
--- Comment #12 from Adam Fontenot <[email protected]> --- (In reply to anixxsus from comment #11) > Somewhat paradoxically they used the term "subpixel font rendering" to mean > something different (an close to opposite) of what this term usually means. > This is the post that announces this controversial change using this > confusing terminology: > https://adamfontenot.com/post/libreoffice_7. > 4_has_a_new_approach_to_text_rendering Hi, I wrote the linked blog post. For clarification I'm not affiliated with TDF nor did I write the code for this change. I was simply enthusiastic about it and couldn't find any discussion elsewhere. I'm a little confused about your complaint regarding terminology. To clarify, "sub-pixel rendering" usually refers to sub-pixel anti-aliasing, which you are calling "subpixel font smoothing". [1] This is unrelated to the change in 7.4, which involves subpixel font *positioning*. This is when anti-aliasing capabilities (whether RGB or grayscale) are used to align glyphs more precisely with their true location as specified by the font metrics, rather than locking them to a single position relative to the screen pixels. But I don't want to bicker about terminology, since it's not relevant to this report. > But it makes the fonts more blurry. It's possible that enabling sub-pixel positioning could make some fonts slightly more blurry, but I don't believe this is expected to be true in the general case. The extremely heavy hinting that Tahoma uses could be the source of some issues. > Plus, they disabled the subpixel font > smoothing, that is using subpixels to increase horizontal resolution thrice > (which is standard terminology). This indicates to me that the issue you are facing was probably not an intentional change in 7.4 and may not be related to the sub-pixel positioning change at all. That's because my platform (which doesn't use Skia) continues to display sub-pixel anti-aliasing (this is actually visible in the blog post's screenshots). I wonder if your issue could be caused by a change in anti-aliasing behavior at small rendering sizes. You might check Options -> LibreOffice -> View, and decrease the value for the minimum screen font anti-aliasing (the default seems to be 8 pixels). Do you see sub-pixel anti-aliasing when you change your zoom level to 100% or 150%? Just a guess. > In the post linked above it is evident that the new rendering overall looks > much worse, but some issues with letter fusing as in "rn" are indeed solved. I strongly disagree, of course. :-) [1] I believe Microsoft uses the language of "smoothing" when describing their ClearType feature, which may have led to this confusion. Most experts writing in this space (as well as Wikipedia) call it sub-pixel rendering or sub-pixel anti-aliasing. Personally, I don't like using the "rendering" term (and mention this in the blog post) precisely because it's irritatingly ambiguous. -- You are receiving this mail because: You are the assignee for the bug.
