XcmsCIELuvQueryMaxC






XcmsCIELuvQueryMaxC, XcmsCIELuvQueryMaxL,
XcmsCIELuvQueryMaxLC, XcmsCIELuvQueryMinL − obtain the CIE
L*u*v* coordinates

Status XcmsCIELuvQueryMaxC(XcmsCCC ccc, XcmsFloat hue_angle,
XcmsFloat L_star, XcmsColor *color_return); Status
XcmsCIELuvQueryMaxL(XcmsCCC ccc, XcmsFloat hue_angle,
XcmsFloat chroma, XcmsColor *color_return); Status
XcmsCIELuvQueryMaxLC(XcmsCCC ccc, XcmsFloat hue_angle,
XcmsColor *color_return); Status XcmsCIELuvQueryMinL(XcmsCCC
ccc, XcmsFloat hue_angle, XcmsFloat chroma, XcmsColor
*color_return);



ccc       Specifies the CCC.  Note that the CCC’s Client
          White Point and White Point Adjustment procedures
          are ignored.

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

color_return
          Returns the CIE L*u*v* 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 hue angle (in degrees) at which to
          find maximum chroma (MaxC and MaxLC), maximum
          lightness (MaxL), or minimum lightness (MinL).

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

The XcmsCIELuvQueryMaxC function, given a hue angle and
lightness, finds the point of maximum chroma displayable by
the screen.  It returns this point in CIE L*u*v*
coordinates.

The XcmsCIELuvQueryMaxL function, given a hue angle and
chroma, finds the point in CIE L*u*v* color space of maximum
lightness (L*) displayable by the screen.  It returns this
point in CIE L*u*v* coordinates.  An XcmsFailure return
value usually indicates that the given chroma is beyond
maximum for the given hue angle.

The XcmsCIELuvQueryMaxLC function, given a hue angle, finds
the point of maximum chroma displayable by the screen.  It









                             ‐2‐


returns this point in CIE L*u*v* coordinates.

The XcmsCIELuvQueryMinL 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*u*v* coordinates.  An XcmsFailure return value usually
indicates that the given chroma is beyond maximum for the
given hue angle.

XcmsCIELabQueryMaxC(3), XcmsTekHVCQueryMaxC(3),
XcmsQueryBlack(3)
Xlib − C Language X Interface