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<refmeta>
<refentrytitle>XcmsCIELabQueryMax</refentrytitle>
<manvolnum>3X11</manvolnum>
<refmiscinfo class='date'>__xorgversion__</refmiscinfo>
<refmiscinfo class='source'>XLIB FUNCTIONS</refmiscinfo>
</refmeta>
<refnamediv id='name'>
<refname>XcmsCIELabQueryMaxC</refname>
<refname>XcmsCIELabQueryMaxL</refname>
<refname>XcmsCIELabQueryMaxLC</refname>
<refname>XcmsCIELabQueryMinL</refname>
<refpurpose>obtain the CIE L*a*b* coordinates</refpurpose>
</refnamediv>
<!-- body begins here -->

<refsect1 id='syntax'><title>SYNTAX</title>

<para>Status XcmsCIELabQueryMaxC&hairsp;(&hairsp;XcmsCCC <emphasis remap='I'>ccc</emphasis>&hairsp;, XcmsFloat
<emphasis remap='I'>hue_angle</emphasis>&hairsp;, XcmsFloat <emphasis remap='I'>L_star</emphasis>&hairsp;, XcmsColor *<emphasis remap='I'>color_return</emphasis>&hairsp;);</para>

<para>Status XcmsCIELabQueryMaxL&hairsp;(&hairsp;XcmsCCC <emphasis remap='I'>ccc</emphasis>&hairsp;, XcmsFloat
<emphasis remap='I'>hue_angle</emphasis>&hairsp;, XcmsFloat <emphasis remap='I'>chroma</emphasis>&hairsp;, XcmsColor *<emphasis remap='I'>color_return</emphasis>&hairsp;);</para>

<para>Status XcmsCIELabQueryMaxLC&hairsp;(&hairsp;XcmsCCC <emphasis remap='I'>ccc</emphasis>&hairsp;, XcmsFloat
<emphasis remap='I'>hue_angle</emphasis>&hairsp;, XcmsColor *<emphasis remap='I'>color_return</emphasis>&hairsp;);</para> 

<para>Status XcmsCIELabQueryMinL&hairsp;(&hairsp;XcmsCCC <emphasis remap='I'>ccc</emphasis>&hairsp;, XcmsFloat
<emphasis remap='I'>hue_angle</emphasis>&hairsp;, XcmsFloat <emphasis remap='I'>chroma</emphasis>&hairsp;, XcmsColor *<emphasis remap='I'>color_return</emphasis>&hairsp;);</para>
</refsect1>

<refsect1 id='arguments'><title>ARGUMENTS</title>
<variablelist remap='IP'>
  <varlistentry>
  <term><emphasis remap='I'>ccc</emphasis></term>
  <listitem>
<para>Specifies the CCC.
Note that the CCC's Client White Point and White Point Adjustment procedures
are ignored.</para>
  </listitem>
  </varlistentry>
  <varlistentry>
  <term><emphasis remap='I'>chroma</emphasis></term>
  <listitem>
<para>Specifies the chroma at which to find maximum lightness (MaxL) or minimum lightness (MinL).
or minimum lightness (MinL)
or hue angle (MaxLC)</para>
  </listitem>
  </varlistentry>
  <varlistentry>
  <term><emphasis remap='I'>color_return</emphasis></term>
  <listitem>
<para>Returns the CIE L*a*b* coordinates of maximum chroma (MaxC and MaxLC), maximum lightnes (MaxL),
displayable by the screen for the given hue angle and lightness (MaxC), hue angle and chroma (MaxL and MinL),.
The white point associated with the returned
color specification is the Screen White Point.
The value returned in the pixel member is undefined.
or minimum lightness (MinL)</para>
  </listitem>
  </varlistentry>
  <varlistentry>
  <term><emphasis remap='I'>hue_angle</emphasis></term>
  <listitem>
<para>Specifies the hue angle (in degrees) at which to find maximum chroma (MaxC and MaxLC), maximum lightness (MaxL),.</para>
  </listitem>
  </varlistentry>
  <varlistentry>
  <term><emphasis remap='I'>L_star</emphasis></term>
  <listitem>
<para>Specifies the lightness (L*) at which to find maximum chroma (MaxC).</para>
  </listitem>
  </varlistentry>
</variablelist>
</refsect1>

<refsect1 id='description'><title>DESCRIPTION</title>
<para>The
<emphasis remap='I'>&hairsp;XcmsCIELabQueryMaxC&hairsp;</emphasis>
function, given a hue angle and lightness,
finds the point of maximum chroma displayable by the screen.
It returns this point in CIE L*a*b* coordinates.</para>

<para>The
<emphasis remap='I'>&hairsp;XcmsCIELabQueryMaxL&hairsp;</emphasis>
function, given a hue angle and chroma,
finds the point in CIE L*a*b* color space of maximum 
lightness (L*) displayable by the screen.
It returns this point in CIE L*a*b* coordinates.
An 
<emphasis remap='I'>&hairsp;XcmsFailure&hairsp;</emphasis>
return value usually indicates that the given chroma
is beyond maximum for the given hue angle.</para>

<para>The
<emphasis remap='I'>&hairsp;XcmsCIELabQueryMaxLC&hairsp;</emphasis>
function, given a hue angle,
finds the point of maximum chroma displayable by the screen.
It returns this point in CIE L*a*b* coordinates.</para>

<para>The
<emphasis remap='I'>&hairsp;XcmsCIELabQueryMinL&hairsp;</emphasis>
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 
<emphasis remap='I'>&hairsp;XcmsFailure&hairsp;</emphasis>
return value usually indicates that the given chroma
is beyond maximum for the given hue angle.</para>
</refsect1>

<refsect1 id='see_also'><title>SEE ALSO</title>
<para>XcmsCIELuvQueryMaxC(3X11),
XcmsTekHVCQueryMaxC(3X11),
XcmsQueryBlack(3X11)
<!-- .br -->
<userinput>Xlib - C Language X Interface</userinput></para>
</refsect1>
</refentry>

