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