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<HTML><HEAD><TITLE>Xlib Programming Manual: Extensions: XcmsCIELabQueryMinL</TITLE></HEAD><BODY><H1 ALIGN=center>XcmsCIELabQueryMinL</H1><H2>Syntax</H2><!.IN "Psychometric Hue Angle"><!.IN "CIE metric lightness"><!.IN "CIE metric lightness" "minimum"><!.IN "XcmsCIELabQueryMinL" "" "@DEF@"><CODE><PRE><B><A HREF="../conversion-contexts-and-gamut-mapping.html#cmsStatus">Status</A></B> XcmsCIELabQueryMinL(<B>ccc</B>, <B>hue_angle</B>, <B>chroma</B>, <B>color_return</B>) <A HREF="../CCC/macros.html">XcmsCCC</A> <B>ccc</B>; XcmsFloat <B>hue_angle</B>; XcmsFloat <B>chroma</B>; <A HREF="../structures.html#XcmsColor">XcmsColor</A> *<B>color_return</B>;</PRE></CODE><H2>Arguments</H2><TABLE><TR><TD> <B>ccc</B><TD> Specifies the <A HREF="../conversion-contexts-and-gamut-mapping.html">CCC</A>.The <A HREF="../conversion-contexts-and-gamut-mapping.html">CCC</A>'s Client White Point and white point adjustment proceduresare ignored.<TR><TD> <B>hue_angle</B><TD> Specifies the hue angle (in degrees) at which to find minimum lightness.<TR><TD> <B>chroma</B><TD> Specifies the chroma at which to find minimum lightness.<TR><TD> <B>color_return</B><TD> Returns the CIE L*a*b* coordinates of minimum lightnessdisplayable by the screen for the given hue angle and chroma.The white point associated with the returnedcolor specification is the Screen White Point.The value returned in the pixel member is undefined.</TABLE><H2>Description</H2> The<B>XcmsCIELabQueryMinL()</B>function, given a hue angle and chroma,finds the point of minimum lightness (L*) displayable by the screen.It returns this point in CIE L*a*b* coordinates.An <B><A HREF="../conversion-contexts-and-gamut-mapping.html#cmsStatus">XcmsFailure</A></B>return value usually indicates that the given chromais beyond maximum for the given hue angle.<H2>See also</H2><B><A HREF="XcmsCIELabQueryMaxC.html">XcmsCIELabQueryMaxC()</A></B>,<B><A HREF="XcmsCIELabQueryMaxL.html">XcmsCIELabQueryMaxL()</A></B>,<B><A HREF="XcmsCIELabQueryMaxLC.html">XcmsCIELabQueryMaxLC()</A></B>,<B><A HREF="XcmsCIELuvQueryMaxC.html">XcmsCIELuvQueryMaxC()</A></B>,<B><A HREF="XcmsQueryBlack.html">XcmsQueryBlack()</A></B>,<B><A HREF="XcmsTekHVCQueryMaxC.html">XcmsTekHVCQueryMaxC()</A></B>,"<A HREF="cielab.html">CIELab Queries</A>".<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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