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November 2022

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[Bug 53857] New: [ fontconfig ] Questions about some font selection logic
by WineHQ Bugzilla 01 Nov '22

01 Nov '22

https://bugs.winehq.org/show_bug.cgi?id=53857 Bug ID: 53857 Summary: [ fontconfig ] Questions about some font selection logic Product: Wine Version: unspecified Hardware: x86 OS: Linux Status: UNCONFIRMED Severity: normal Priority: P2 Component: win32u Assignee: wine-bugs(a)winehq.org Reporter: 399989567(a)qq.com Distribution: --- Created attachment 73387 --> https://bugs.winehq.org/attachment.cgi?id=73387 Simsun Test My application uses "宋体" （Simsun） as the font of choice，which use WindowsAPI > SelectObject(hdc,hfont) When I set the property(lfPitchAndFamily) of "宋体" to 0x22(FF_SWISS) and 0x36(FF_MODERN), wine converts "宋体" into Noto Sans CJK SC and Noto Sans Mono CJK SC respectively. I looked at the source code because "宋体" is not installed on my computer, so when wine doesn't find any fonts, wine end up calling "find_any_face" API and entering the first loop, using "enum_fallbacks" API to find the fonts. When i > 3, which means the fonts in the default_fixed_list are not suitable,Wine uses "fontconfig_enum_family_fallbacks" API to find fonts through fontconfig. Here wine determines which type of font the "宋体" belongs to (serif, sans-serif, monospaced) based on the "lfPitchAndFamily" attribute of the "宋体". So ended up returning a different font: > FF_SWISS -> fc-match "sans" -> Noto Sans CJK SC > FF_MODERN -> fc-match "mono" -> Noto Sans Mono CJK SC But it's not what I expected, I want "宋体" to return Noto Sans CJK SC forever,and on my computer when I use ' $ fc-match "宋体" ', it returns "Noto Sans CJK SC". I konw "宋体" became "Noto Sans Mono CJK SC" is becaues wine design. But, I would like to ask why not directly use fontconfig to find fonts according to the font name in the "fontconfig_enum_family_fallbacks" function, but to search according to the font type. ues fc-match "fontname" instead of fc-match "sans or mono or serif" Is it because using fontconfig is a very resource-intensive thing, so wine divides the fonts into three types, and stores the results of the three fonts in the cache, so that the cache can be directly read the next time it is called? I don't know if my description is correct, feel free to contact me if you have any questions ———————————— export LC_ALL=zh_CN.UTF-8 and run my exe file the first line is "宋体" 0x36 -> became Mono the second line is "宋体" 0x22 -> became Sans Don't mind the third and fourth lines -- Do not reply to this email, post in Bugzilla using the above URL to reply. You are receiving this mail because: You are watching all bug changes.

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