NAME
XcmsCIELabQueryMaxC, XcmsCIELabQueryMaxL, XcmsCIELabQueryMaxLC,
XcmsCIELabQueryMinL - obtain the CIE L*a*b* coordinates
SYNTAX
Status XcmsCIELabQueryMaxC(XcmsCCC ccc, XcmsFloat hue_angle, XcmsFloat
L_star, XcmsColor *color_return);
Status XcmsCIELabQueryMaxL(XcmsCCC ccc, XcmsFloat hue_angle, XcmsFloat
chroma, XcmsColor *color_return);
Status XcmsCIELabQueryMaxLC(XcmsCCC ccc, XcmsFloat hue_angle, XcmsColor
*color_return);
Status XcmsCIELabQueryMinL(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).
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 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).
DESCRIPTION
The XcmsCIELabQueryMaxC 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.
The XcmsCIELabQueryMaxL 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 XcmsFailure return value usually indicates that the
given chroma is beyond maximum for the given hue angle.
The XcmsCIELabQueryMaxLC 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.
The XcmsCIELabQueryMinL 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 XcmsFailure return
value usually indicates that the given chroma is beyond maximum for the
given hue angle.
SEE ALSO
XcmsCIELuvQueryMaxC(3), XcmsTekHVCQueryMaxC(3), XcmsQueryBlack(3)
Xlib - C Language X Interface