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