XFT is the X FreeType (TrueType clone/compatible) Font rasterization library (It draws font). FreeType fonts are just like TrueType (ttf). Fontconfig is a library for global font configuration. Font is really simple, just think of it as stamps. Read about rasterization and you'll understand better how font works.
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XFT 是 X FreeType（TrueType 克隆/兼容）字体光栅化库（它绘制字体）。 FreeType 字体就像 TrueType (ttf)。 Fontconfig 是一个用于全局字体配置的库。 字体其实很简单，把它想象成邮票就可以了。 阅读有关光栅化的内容，您将更好地了解字体的工作原理。
XFT is the X FreeType (TrueType clone/compatible) Font rasterization library (It draws font). FreeType fonts are just like TrueType (ttf). Fontconfig is a library for global font configuration. Font is really simple, just think of it as stamps. Read about rasterization and you'll understand better how font works.
简短回答：
http://behdad.org/text/（有点过时）
长答案：阅读文本布局演示文稿和他们链接到的邮件列表
在 freedesktop.org/wiki/TextLayout/
从...开始
http://www.unifont.org/textlayout/TheBigPicture.pdf
然后你可以阅读planet.open-fonts.org
Short answer:
http://behdad.org/text/ (a bit dated)
Long answer: read text layout presentations and the mailing lists they link to
on freedesktop.org/wiki/TextLayout/
starting from
http://www.unifont.org/textlayout/TheBigPicture.pdf
Then you can read planet.open-fonts.org