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Description of problem: The following screenshots let Fedora 15 and Ubuntu 11.04 visit the same Chinese web portal in Firefox: Fedora 15: http://img853.imageshack.us/img853/9764/fedora15.png Ubuntu 11.04: http://img64.imageshack.us/img64/7025/ubuntu1104k.png As you can see, Ubuntu's chinese display is sharp and clear, like written with a pen; Fedora's is fuzzy and blurry, like written with a fuzzy brush. Ubuntu's has much better readability. Version-Release number of selected component (if applicable): How reproducible: Let Fedora 15 and Ubuntu 11.04 browse http://www.sina.com.cn in Firefox.
Created attachment 501722 [details] Fedora 15's Firefox visiting www.sina.com.cn
Created attachment 501723 [details] Ubuntu 11.04's Firefox visiting www.sina.com.cn
Please provide the result of the following command: $ rpm -qa "wqy-*-fonts"
wqy-bitmap-fonts-1.0.0-0.2.rc1.fc15.noarch wqy-unibit-fonts-1.1.0-8.fc15.noarch wqy-zenhei-fonts-0.9.46-2.fc15.noarch I manually installed wqy-bitmap-fonts. But before and after installing it, the result is the same. A friend suspects the bug is related to GNOME 3's new font rendering engine. He says Fedora 14 used to be as good as Ubuntu in this aspect. Another friend suspects that Ubuntu uses some non-free font or font anti-aliasing technology.
Please remove wqy-bitmap-fonts and wqy-unibit-fonts from your system, and run the following command as root user: # zenheiset bitmap I think the above command will enable bitmap font in wqy-zenhei-fonts, and fixes this bug.
Yes, it fixed it. Please make it the default.
Created attachment 501753 [details] Fedora 15's Firefox visiting www.sina.com.cn with zoom in twice
Created attachment 501754 [details] Ubuntu 11.04's Firefox visiting www.sina.com.cn with zoom in twice
But Ubuntu is still better: If I zoom in in Ubuntu's Firefox (press <Ctrl> + <+> twice), its Chinese font remains the same and the result is very clear: https://bugzilla.redhat.com/attachment.cgi?id=501754 If I zoom in in Fedora's Firefox (press <Ctrl> + <+> twice), the bitmap font will switch to truetype ZenHei, and the result is not as clear as Ubuntu's: https://bugzilla.redhat.com/attachment.cgi?id=501753
In Fedora's result, some strokes are much lighter than other strokes, making the characters look "watered down".
I think Ubuntu is using wqy-microhei-fonts, we make wqy-zenhei-fonts as the default font for Simplified Chinese, as it contains more glyphs than wqy-microhei-fonts. And we need discussions to fit most user preferences, we will consider it later.
In my personal opinion, readability is more important than glyph availability. What about making microhei the default font and zenhei a backup font in case a rare character is not covered by microhei?
Created attachment 502922 [details] Defaul Chinese small font in Fedora 14
It is observed that Fedora 14 provides a clearer (sharper) default Chinese font (ZenHei) for small font sizes in Firefox. Compare: F14: https://bugzilla.redhat.com/attachment.cgi?id=502922 F15: https://bugzilla.redhat.com/attachment.cgi?id=501722 Still, microhei as seen in Ubuntu 11.04 is the best among all.
Created attachment 503132 [details] Fedora 15 microhei
It seems, Fedora 15 and Ubuntu 11.04 draw microhei differently (Ubuntu doing more clearly): F15 drawing microhei: https://bugzilla.redhat.com/attachment.cgi?id=503132 Ubuntu 11.04 drawing microhei: https://bugzilla.redhat.com/attachment.cgi?id=501723
Please install both wqy-microhei-fonts and wqy-zenhei-fonts on Fedora. And put the following file as ~/.fonts.conf in your home directory: http://pwu.fedorapeople.org/fonttools/fonts.conf.example We will try to provide a tool to customize your fonts in the future.
Please use fonts-tweak-tool to customize the fonts by yourself.