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<HTML><HEAD><TITLE>Xlib Programming Manual: Color Spaces</TITLE></HEAD><BODY><H1 ALIGN=center>6.12.1 Color Spaces</H1>The CIE XYZ color space serves as the hub for allconversions between device-independent and device-dependent color spaces.Therefore, the knowledge to convert an <A HREF="../structures.html#XcmsColor">XcmsColor</A>structure to and from CIE XYZ format is associated with each color space.For example, conversion from CIE L*u*v* to RGB requires the knowledgeto convert from CIE L*u*v* to CIE XYZ and from CIE XYZ to RGB.This knowledge is stored as an array of functions that,when applied in series, will convert the <A HREF="../structures.html#XcmsColor">XcmsColor</A>structure to or from CIE XYZ format.This color specification conversion mechanism facilitatesthe addition of color spaces.<P>Of course, when converting between only device-independent color spacesor only device-dependent color spaces,shortcuts are taken whenever possible.For example, conversion from TekHVC to CIE L*u*v* is performed by intermediate conversion to CIE u*v*Y and then to CIE L*u*v*, thus bypassing conversion between CIE u*v*Y and CIE XYZ.<H5 ALIGN=right><I>Next: <A HREF="adding-dev-indepedent-spaces.html">Adding Device-Independent Color Spaces</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>?? 快捷鍵說明
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