222 lines
6.4 KiB
Groff
222 lines
6.4 KiB
Groff
.\" Copyright \(co 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1994, 1996 X Consortium
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.\"
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.\" Permission is hereby granted, free of charge, to any person obtaining
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.\" a copy of this software and associated documentation files (the
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.\" "Software"), to deal in the Software without restriction, including
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.\" without limitation the rights to use, copy, modify, merge, publish,
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.\" distribute, sublicense, and/or sell copies of the Software, and to
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.\" permit persons to whom the Software is furnished to do so, subject to
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.\" the following conditions:
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.\"
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.\" The above copyright notice and this permission notice shall be included
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.\" in all copies or substantial portions of the Software.
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.\"
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.\" THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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.\" OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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.\" MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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.\" IN NO EVENT SHALL THE X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR
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.\" OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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.\" ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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.\" OTHER DEALINGS IN THE SOFTWARE.
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.\"
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.\" Except as contained in this notice, the name of the X Consortium shall
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.\" not be used in advertising or otherwise to promote the sale, use or
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.\" other dealings in this Software without prior written authorization
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.\" from the X Consortium.
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.\"
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.\" Copyright \(co 1985, 1986, 1987, 1988, 1989, 1990, 1991 by
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.\" Digital Equipment Corporation
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.\"
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.\" Portions Copyright \(co 1990, 1991 by
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.\" Tektronix, Inc.
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.\"
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.\" Permission to use, copy, modify and distribute this documentation for
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.\" any purpose and without fee is hereby granted, provided that the above
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.\" copyright notice appears in all copies and that both that copyright notice
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.\" and this permission notice appear in all copies, and that the names of
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.\" Digital and Tektronix not be used in in advertising or publicity pertaining
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.\" to this documentation without specific, written prior permission.
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.\" Digital and Tektronix makes no representations about the suitability
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.\" of this documentation for any purpose.
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.\" It is provided ``as is'' without express or implied warranty.
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.\"
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.\"
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.ds xT X Toolkit Intrinsics \- C Language Interface
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.ds xW Athena X Widgets \- C Language X Toolkit Interface
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.ds xL Xlib \- C Language X Interface
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.ds xC Inter-Client Communication Conventions Manual
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.na
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.de Ds
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.nf
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.\\$1D \\$2 \\$1
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.ny0
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.TH XcmsCIELabQueryMax __libmansuffix__ __xorgversion__ "XLIB FUNCTIONS"
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.SH NAME
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XcmsCIELabQueryMaxC, XcmsCIELabQueryMaxL, XcmsCIELabQueryMaxLC, XcmsCIELabQueryMinL \- obtain the CIE L*a*b* coordinates
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.SH SYNTAX
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.HP
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Status XcmsCIELabQueryMaxC\^(\^XcmsCCC \fIccc\fP\^, XcmsFloat
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\fIhue_angle\fP\^, XcmsFloat \fIL_star\fP\^, XcmsColor *\fIcolor_return\fP\^);
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.HP
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Status XcmsCIELabQueryMaxL\^(\^XcmsCCC \fIccc\fP\^, XcmsFloat
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\fIhue_angle\fP\^, XcmsFloat \fIchroma\fP\^, XcmsColor *\fIcolor_return\fP\^);
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.HP
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Status XcmsCIELabQueryMaxLC\^(\^XcmsCCC \fIccc\fP\^, XcmsFloat
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\fIhue_angle\fP\^, XcmsColor *\fIcolor_return\fP\^);
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.HP
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Status XcmsCIELabQueryMinL\^(\^XcmsCCC \fIccc\fP\^, XcmsFloat
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\fIhue_angle\fP\^, XcmsFloat \fIchroma\fP\^, XcmsColor *\fIcolor_return\fP\^);
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.SH ARGUMENTS
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.IP \fIccc\fP 1i
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Specifies the CCC.
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Note that the CCC's Client White Point and White Point Adjustment procedures
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are ignored.
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.ds Ch maximum lightness (MaxL) or minimum lightness (MinL)
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.IP \fIchroma\fP 1i
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Specifies the chroma at which to find \*(Ch.
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.ds Lc maximum chroma (MaxC and MaxLC), maximum lightness (MaxL), \
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or minimum lightness (MinL)
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.ds lC hue angle and lightness (MaxC), hue angle and chroma (MaxL and MinL), \
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or hue angle (MaxLC)
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.IP \fIcolor_return\fP 1i
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Returns the CIE L*a*b* coordinates of \*(Lc
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displayable by the screen for the given \*(lC.
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The white point associated with the returned
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color specification is the Screen White Point.
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The value returned in the pixel member is undefined.
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.ds Ha maximum chroma (MaxC and MaxLC), maximum lightness (MaxL), \
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or minimum lightness (MinL)
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.IP \fIhue_angle\fP 1i
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Specifies the hue angle (in degrees) at which to find \*(Ha.
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.ds Ls maximum chroma (MaxC)
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.IP \fIL_star\fP 1i
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Specifies the lightness (L*) at which to find \*(Ls.
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.SH DESCRIPTION
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The
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.ZN XcmsCIELabQueryMaxC
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function, given a hue angle and lightness,
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finds the point of maximum chroma displayable by the screen.
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It returns this point in CIE L*a*b* coordinates.
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.LP
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The
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.ZN XcmsCIELabQueryMaxL
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function, given a hue angle and chroma,
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finds the point in CIE L*a*b* color space of maximum
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lightness (L*) displayable by the screen.
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It returns this point in CIE L*a*b* coordinates.
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An
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.ZN XcmsFailure
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return value usually indicates that the given chroma
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is beyond maximum for the given hue angle.
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.LP
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The
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.ZN XcmsCIELabQueryMaxLC
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function, given a hue angle,
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finds the point of maximum chroma displayable by the screen.
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It returns this point in CIE L*a*b* coordinates.
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.LP
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The
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.ZN XcmsCIELabQueryMinL
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function, given a hue angle and chroma,
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finds the point of minimum lightness (L*) displayable by the screen.
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It returns this point in CIE L*a*b* coordinates.
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An
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.ZN XcmsFailure
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return value usually indicates that the given chroma
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is beyond maximum for the given hue angle.
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.SH "SEE ALSO"
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XcmsCIELuvQueryMaxC(__libmansuffix__),
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XcmsTekHVCQueryMaxC(__libmansuffix__),
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XcmsQueryBlack(__libmansuffix__)
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.br
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\fI\*(xL\fP
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