Xlib − C Language X Interface

Xlib − C LibraryX11, Release 6.7 DRAFTStatus XcmsCIELuvQueryMaxLC(ccc, hue_angle, color_return)XcmsCCC ccc;XcmsFloat hue_angle;XcmsColor *color_return;ccchue_anglecolor_returnSpecifies the CCC. The CCC’s Client White Point and white point adjustmentprocedures are ignored.Specifies the hue angle (in degrees) at which to find maximum chroma.Returns the CIE L*u*v* coordinates of maximum chroma displayable by thescreen for the given hue angle. The white point associated with the returnedcolor specification is the Screen White Point. The value returned in the pixelmember is undefined.The XcmsCIELuvQueryMaxLC function, given ahue angle, finds the point of maximumchroma displayable by the screen. It returns this point in CIE L*u*v* coordinates.To obtain the CIE L*u*v* coordinates of minimum CIE metric lightness (L*) for a given PsychometricHue Angle and Psychometric Chroma, use XcmsCIELuvQueryMinL.Status XcmsCIELuvQueryMinL(ccc, hue_angle, chroma, color_return)XcmsCCC ccc;XcmsFloat hue_angle;XcmsFloat chroma;XcmsColor *color_return;ccchue_anglechromacolor_returnSpecifies the CCC. The CCC’s Client White Point and white point adjustmentprocedures are ignored.Specifies the hue angle (in degrees) at which to find minimum lightness.Specifies the chroma at which to find minimum lightness.Returns the CIE L*u*v* coordinates of minimum lightness displayable by thescreen for the given hue angle and chroma. The white point associated with thereturned color specification is the Screen White Point. The value returned in thepixel member is undefined.The XcmsCIELuvQueryMinL function, given ahue angle and chroma, finds the point of minimumlightness (L*) displayable by the screen. It returns this point in CIE L*u*v* coordinates.An XcmsFailure return value usually indicates that the given chroma is beyond maximum for thegiven hue angle.6.11.4. TekHVC QueriesTo obtain the maximum Chroma for a given Hue and Value, use XcmsTekHVCQueryMaxC.117