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XcmsCIELabQueryMax*()					 XcmsCIELabQueryMax*()

Name
  XcmsCIELabQueryMaxC,	XcmsCIELabQueryMaxL,  XcmsCIELabQueryMaxLC,  Xcm‐
  sCIELabQueryMinL – obtain the bounds of the target screen's color gamut
  in terms of CIE L*a*b* coordinates.

Synopsis
  Status XcmsCIELabQueryMaxC(ccc, hue_angle, L_star, color_return)
	   XcmsCCC ccc;
	   XcmsFloat hue_angle;
	   XcmsFloat L_star;
	   XcmsColor *color_return;
  Status XcmsCIELabQueryMaxL(ccc, hue_angle, chroma, color_return)
	   XcmsCCC ccc;
	   XcmsFloat hue_angle;
	   XcmsFloat chroma;
	   XcmsColor *color_return;
  Status XcmsCIELabQueryMaxLC(ccc, hue_angle, color_return)
	   XcmsCCC ccc;
	   XcmsFloat hue_angle;
	   XcmsColor *color_return;
  Status XcmsCIELabQueryMinL(ccc, hue_angle, chroma, color_return)
	   XcmsCCC ccc;
	   XcmsFloat hue_angle;
	   XcmsFloat chroma;
	   XcmsColor *color_return;

Arguments
  ccc	    Specifies  the color conversion context.  Note that the CCC's
	    Client White Point and White Point Adjustment procedures  are
	    ignored.

  chroma    Specifies  the  CIELAB  psychometric  chroma at which to find
	    maximum lightness (MaxL) or minimum lightness (MinL).

  color_return
	    Returns the CIE L*a*b* coordinates of  maximum  chroma  (MaxC
	    and	 MaxLC),  maximum  lightness (MaxL), or minimum lightness
	    (MinL) displayable by the screen for the given hue angle  and
	    lightness  (MaxC),	hue  angle and chroma (MaxL and MinL), or
	    hue angle (MaxLC).	 The  white  point  associated	with  the
	    returned  color specification is the Screen White Point.  The
	    value returned in the pixel member is undefined.

  hue_angle Specifies the CIELAB psychometric hue  angle  in  degrees  at
	    which to find maximum chroma (MaxC and MaxLC), maximum light‐
	    ness (MaxL), or minimum lightness (MinL).

  L_star    Specifies the lightness (L*) at which to find maximum  chroma
	    (MaxC).

Returns
  Zero on failure, non-zero on success.

Availability
  Release 5 and later.

Description
  XcmsCIELabQueryMaxC()	 finds the point of maximum chroma displayable by
  the screen at the given hue angle and lightness.

  XcmsCIELabQueryMaxL() finds the point in CIELAB color space of  maximum
  lightness  (L*)  displayable	by  the screen at the given hue angle and
  chroma.  An XcmsFailure return value usually indicates that  the  given
  chroma is beyond maximum for the given hue angle.

  XcmsCIELabQueryMaxLC() finds the point of maximum chroma displayable by
  the screen at the given hue angle.

  XcmsCIELabQueryMinL() finds the point of minimum  lightness  (L*)  dis‐
  playable by the screen at the given hue angle and chroma.  An XcmsFail‐
  ure return value usually indicates that the given chroma is beyond max‐
  imum for the given hue angle.

  All  these  functions	 return a point in CIE L*a*b* color space coordi‐
  nates.

See Also
  XcmsCIELuvQueryMaxC(),  XcmsCIELuvQueryMaxL(),  XcmsCIELuvQueryMaxLC(),
  XcmsCIELuvQueryMinL(), XcmsTekHVCQueryMaxC(), XcmsTekHVCQueryMaxL, Xcm‐
  sTekHVCQueryMaxLC,  XcmsTekHVCQueryMinL,  XcmsQueryBlack(),  XcmsQuery‐
  Blue(), XcmsQueryGreen(), XcmsQueryRed(), XcmsQueryWhite().

Xlib - Device-independent Color				 XcmsCIELabQueryMax*()

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