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Xft Ҳһ library, ʹ Fontconfig match Ҫ֮, Q ԓή@Щ֡Xft rQҪҪʹ core protocol XRender ֡XRender XFree86 4.x extension, J@Ǟ˱ X һ hack, ^Á anti-aliased ֣Ŀǰ ʹV^ anti-aliased text ֻʹ͵ĕrã LucֵĕrҪʹ core lib. Core library x-truetype freetype backendȻҲǿԮֻ֣^ľͲ anti-aliased Чˡ
Еr XRender ʹÕr^W·һf X server X apps, Xft Ҳʹ core lib ֡óʽ؞@Щ}ģ_ YӍ[ء\Ŀġ
Freetype (em>) һܰĮֺʽ죬XFree86 4.3 Ⱥ 2.1.2. Freetype ṩ Xft ήֵYӍ̎ anti-aliasing hinting. freetype ĸ׃Ӱ푵 Xft ֣ Fontconfig ĸ׃Ӱ푵 Xft ȥxց
@evľµ Fontconfig c Xft2 Of Xft1.0 ~/.xftconfig Ͳˡ
b fontconfig, NԓѽһAOOnԵ /etc/fonts/ (һЩ Linux distributions) /usr/X11R6/etc/fonts (һЩ BSD flavors) ҿ fonts.conf @n
fonts.conf Ǻε xml ʽ etc/ e fonts.conf system-wide Oһ㲻hֱӸԸ local.conf ԼĿ ~/.fonts.conf . P fonts.conf ĸNZ manpage e^ѽú ԔM@eֻἰ^ҪһЩݣdȤ߿ man fonts-conf. еO <fontconfig> c </fontconfig> ֮gпS tags, Ԕ tags ԅ fonts.dtd manpage.
<dir> eһ·fontconfig Լfޒȥ@·e^ͣ: <dir>/foo/bar/myfonts</dir>
<include> OnMĸʽһӵġ
Ҫ element ԓ <match> ˡmatch ҪЃɷN÷, һN pattern match, һN font match. ǰߕе match ᘌĸĕõе͵xʽϡʲNҪ͵Č? @ӿᘌeV Fontconfig ԓȥ̎@ЩͣǸV renderer ԓȥ@Щ͡@eһЩõԵбPеČ ՈǢ manpage
Hinting Áѻ@ʾķΞĻޣ͵ĿsҪ иĿ, 箔һlλڃɂظgr, ԓȡ߅ĸ߀߅ ĸ? @Ŀƛ]ãͳF͵r]ЌRС Ť˵r Hinting ~YӍ, V renderer ԓ̎@Щ IJݣʹСֵĕr܉ÿҲ Hinting ǷdzMrM ĹTrueType ͺܶ࣬ Hinting Ͳࡣӵ Hinting ͕׃úy
@}freetype autohint ĹܣԄӞ] hint hinting Ĺ TrueType hinting Ќģ ȫɵʹã autohint Ͳ@ơautohint Ȼo hint һӺã^ٱț] hint ҪЩԒmˣSP}s () Ŀǰ freetype autohint ߀ò齨 hinting yȣʹӢ֣ԭͺܸߣȽ hinting ; ֮ˡԳ˱ԹΞĻϺyǛ] hinting, ʹ autohinter ɵһЩЧ
Anti-alias njĻԔĴСLuȻٿsҪĴСδ MһĸûAacԭ X ֧Ԯ logic \㲻ʹãԲ XRender extension _Ŀġһ Anti-alias ֮⣬Xft ߀֧Ԯ ˞ LCD OӋ subpixel rendering.
ʲN subpixel rendering? ÷ŴRȥ LCD, lFһεLСؘɵġ@ ͨǼtG{}dz hinting, Sr, distribution freetype bytecode hinting _ʹ̓Ȳ bytecode hinting freetype AO]д_ʹ freetype e^ autohinter, ЕrЧ eЕrsM⡣ hinting MrMֵOӋ hinting ĕrֻᘌcֵ@ʾ hinting Ĺ@ʾ҂ @ʾС anti-aliasing ԒͨDzOӋѻĹȵ; hinting ĕrС anti-aliasing ͕@÷dzyŤ˻ DһFP@ freetype ˺ܶŬ autohinter Ҳʽ Լ hinting 㷨 hinting ǂֵܼĆ}Mac OS X anti-aliasing ;Ͷʹ hinting. fontconfig ҂{}ص pattern match: Ҫʹ pattern match, ֻҪµ pattern, ͕е:
<match target="pattern">
...
</match>
gŵĿһB test, ȻһB edit. test ÷:
<test qual="any|all|first|not_first"
name=""
compare="eq|not_eq|less|less_eq|more|more_eq|contains|not_contains">
ֵ
</test>
any ָf, ֻҪ͵ԓ list ֮һзҪ test ֵ, test ͕all ԒҪ list ֮еĶϣfirst Ҫһϣ not_first Ҫ˵һзϵġֻͨõ any, AOҲ any. name eľǰČ, name="family". compare DZ^ėl, eq , less С, Դơ <test> סǂֵҪÁ^ֵ : int, double, string, matrix, bool ȵȡһ test ėl, ͕Mе edit AΣϗl test lČ:
<edit name=""
mode="assign|assign_replace|prepend|append|prepend_first|append_last">
ֵ
</edit>
ע fontconfig , (property) һ list, ༴һԿ Sֵ assign f match ֵȡ, assign_replace fԓ list ֵȡֵָ, prepend tDz list б match ǂֵ ǰ^, Դơ
fonts.conf eһ:
<match target="pattern">
<test name="prefer_outline">
<bool>true</bool>
</test>
<test name="family">
<string>Times</string>
</test>
<edit name="family" mode="prepend" binding="same">
<string>Times New Roman</string>
</edit>
</match>
@ pattern match f, prefer_outline ֵ true ĕr, family ֽ Times, NͰ family list ǰ Times New Roman@ԭ, Times c, ϣSóʽָ Times @ʾr, Ҫc@ʾ, Ҫ Times New Roman @ TrueType @ʾ, @ӿ Times New Roman ăș Times ǰ档 Family matching һN match ÷ pattern matching ֻᘌe͵Čģ÷:
<match target="font">
...
</match>
eӣAO܉_ anti-aliasing, hinting Kʹ subpixel rendering, Ҿ͌:
<match target="font">
<edit name="antialias"><bool>true</bool></edit>
<edit name="rgba" mode="assign"><const>rgb</const></edit>
<edit name="hinting"><bool>true</bool></edit>
</match>
ҿX Luxi Mono @ijЩr, subpixel ̫ÿ, Ҿ͌:
<match target="font">
<test name="family"><string>Luxi Mono</string></test>
<edit name="rgba"><const>none</const></edit>
</match>
Q. кܶ ttf, ҪNb?
ǰf^, ȫG ~/.fonts/ e^ȥɡ symbolic link ҲԡG֮һ fc-list гѰbͿЛ]e档Q. b, ҵijʽ (rxvt, aterm, gtk1.x) sʹ
@Щʽʹ X core fonts, ʹ fontconfig Ҳ]֧Ԯ Xft, ͛]k@ӵı^߀ǿ^yķʽb@Щ͡µ gtk2, Gnome2, mlterm, Mozilla (Firebird), Qt3.x ֧Ԯ fontconfigQ. Ҫʹ¼wԆ
, mingliu.ttc G ~/.fonts ˡQ. Ҫ Windows Сǘӵ¼wkأʲNһЩС¼wĹPأ