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<HTML><HEAD><TITLE>Xlib Programming Manual: Device-Independent String Specifications</TITLE></HEAD><BODY><H1 ALIGN=center>6.2.3 Device-Independent String Specifications</H1>The standard device-independent string specifications havethe following syntax:<P><CODE><PRE>CIEXYZ:<B><X>/<Y>/<Z></B>CIEuvY:<B><u>/<v>/<Y></B>CIExyY:<B><x>/<y>/<Y></B>CIELab:<B><L>/<a>/<b></B>CIELuv:<B><L>/<u>/<v></B>TekHVC:<B><H>/<V>/<C></B></PRE></CODE><P>All of the values (C, H, V, X, Y, Z, a, b, u, v, y, x) arefloating-point values.The syntax for these values is an optional plus or minus sign,a string of digits possibly containing a decimal point,and an optional exponent field consisting of an ``E'' or ``e''followed by an optional plus or minus followed by a string of digits.<H5 ALIGN=right><I>Next: <A HREF="../conversion-contexts-and-gamut-mapping.html">Color Conversion Contexts and Gamut Mapping</A></I></H5><HR><ADDRESS><A HREF="http://tronche.com/">Christophe Tronche</A>, <A HREF="mailto:ch.tronche@computer.org">ch.tronche@computer.org</A></ADDRESS></BODY></HTML>⌨️ 快捷键说明
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