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 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.
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.
