Created attachment 874108 [details] comparison between Liberation Sans and Helvetica Description of problem: The rendering of the two Unicode tie bar combining characters (U+035E and U+035F) is not ideal. In particular the characters are quite short and far away from the characters they are tying together. This makes it appear more like a misplaced macron than a tie bar. The rendering in Liberation Sans appears to be equivalent to that of Arial which has the same issues. The rendering in Helvetica is better (see attachment 1 [details]). In particular, because the under tie bar (U+035F) is so far away from the other characters, it sometimes gets clipped when rendered, as it appears to fall slightly outside of the bounding box for the line height (see attachment 2 [details]). My suggestion would be to make the length of both tie bars slightly longer, and to move both of them slightly closer to the characters they are intended to tie together. Version-Release number of selected component (if applicable): 12-Mar-2014 (2.x) How reproducible: Always Steps to Reproduce: 1. Install latest Liberation Sans (and Helvetica if you want to compare) 2. Go to https://www.mediawiki.org/wiki/User:Kaldari/Font_test_2 Actual results: Tie bars should be slightly longer and closer to the other characters. Expected results: Tie bar are quite short and far away. Additional info: See attachments for more info.
Created attachment 874118 [details] screenshot showing clipping
By the way, if you adjust the tie bar characters, you may want to look at the other tie characters at the same time to make sure they are all visually consistant: Rendered: a͜a a͝a a͞a a͟a a͠a a͡a HTML: a͜a a͝a a͞a a͟a a͠a a͡a Unicode: U+035C U+035D U+035E U+035F U+0360 U+0361
Agree with you !! We just need to make sure fixing this does not create any kind of regression. I will fix this.
In this example you have mentioned only about "a U+035e a" , how about "a U+035e b"? same applies for f, d Existing position of uni035F works fine even with a͞b How helvetica rendering it?
Unfortunately i dont have helvetica font with me. 1. Your "attachment 1 [details]" is not opening at my end. Please attach it again. 2. Give me screenshot about how Helvetica handling a͞b and a͟g If possible provide me link to get Helvetica.
Created attachment 888126 [details] comparison with more characters I've attached a new screenshot showing the combinations requested.
I case you can't open that attachment for some reason... Helvetica is rendering a͞b and a͟g the same as Liberation Sans except for the horizontal position. In other words, it crosses the b and g, which is fine I think.
I tried to fix this in http://pravins.fedorapeople.org/LiberationSans-Regular.ttf and http://pravins.fedorapeople.org/LiberationSans-Bold.ttf Issue after this fix is. 1. For low width characters like "i", "j", "l" tie bar will get merged with previous letter. Please test this and let me know if this work fine. Presently only improved for latin small case letters "a-z" Do give some reference from helvetica if issues.
This looks great. Nice work!
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As far as I know this fix has never been pushed upstream. Please update if that is incorrect.
This bug appears to have been reported against 'rawhide' during the Fedora 33 development cycle. Changing version to 33.
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This package has changed maintainer in Fedora. Reassigning to the new maintainer of this component.