XcmsCIELuvQueryMaxC(XS)  X Version 11 (Release 5)    XcmsCIELuvQueryMaxC(XS)
                                6 January 1993


 Name

    XcmsCIELuvQueryMaxC - obtain the CIE L*u*v* coordinates

 Syntax


    Status XcmsCIELuvQueryMaxC(ccc, hue_angle, L_star, color_return)
          XcmsCCC ccc;
          XcmsFloat hue_angle;
          XcmsFloat L_star;
          XcmsColor *color_return;

    Status XcmsCIELuvQueryMaxL(ccc, hue_angle, chroma, color_return)
          XcmsCCC ccc;
          XcmsFloat hue_angle;
          XcmsFloat chroma;
          XcmsColor *color_return;

    Status XcmsCIELuvQueryMaxLC(ccc, hue_angle, color_return)
          XcmsCCC ccc;
          XcmsFloat hue_angle;
          XcmsColor *color_return;

    Status XcmsCIELuvQueryMinL(ccc, hue_angle, chroma, color_return)
          XcmsCCC ccc;
          XcmsFloat hue_angle;
          XcmsFloat chroma;
          XcmsColor *color_return;


 Arguments


    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).

    colorreturn Returns the CIE L*u*v* coordinates of maximum chroma (MaxC
                 and MaxLC), maximum lightnes (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.

    hueangle    Specifies the hue angle in degrees at which to find maximum
                 chroma (MaxC and MaxLC), maximum lightness (MaxL), or mini-
                 mum lightness (MinL).

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

 Description

    The XcmsCIELuvQueryMaxC function, given a hue angle and lightness, finds
    the point of maximum chroma displayable by the screen.  Note that 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.  Note that 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.  Note that it 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.  Note that 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.

 See also

    XcmsCIELabQueryMaxC(XS), XcmsTekHVCQueryMaxC(XS), XcmsQueryBlack(XS)
    Xlib - C Language X Interface