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authormarha <marha@users.sourceforge.net>2009-06-28 22:07:26 +0000
committermarha <marha@users.sourceforge.net>2009-06-28 22:07:26 +0000
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+'\" t
+.\" Copyright \(co 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1994, 1996 X Consortium
+.\"
+.\" Permission is hereby granted, free of charge, to any person obtaining
+.\" a copy of this software and associated documentation files (the
+.\" "Software"), to deal in the Software without restriction, including
+.\" without limitation the rights to use, copy, modify, merge, publish,
+.\" distribute, sublicense, and/or sell copies of the Software, and to
+.\" permit persons to whom the Software is furnished to do so, subject to
+.\" the following conditions:
+.\"
+.\" The above copyright notice and this permission notice shall be included
+.\" in all copies or substantial portions of the Software.
+.\"
+.\" THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+.\" OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+.\" MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+.\" IN NO EVENT SHALL THE X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR
+.\" OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+.\" ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+.\" OTHER DEALINGS IN THE SOFTWARE.
+.\"
+.\" Except as contained in this notice, the name of the X Consortium shall
+.\" not be used in advertising or otherwise to promote the sale, use or
+.\" other dealings in this Software without prior written authorization
+.\" from the X Consortium.
+.\"
+.\" Copyright \(co 1985, 1986, 1987, 1988, 1989, 1990, 1991 by
+.\" Digital Equipment Corporation
+.\"
+.\" Portions Copyright \(co 1990, 1991 by
+.\" Tektronix, Inc.
+.\"
+.\" Permission to use, copy, modify and distribute this documentation for
+.\" any purpose and without fee is hereby granted, provided that the above
+.\" copyright notice appears in all copies and that both that copyright notice
+.\" and this permission notice appear in all copies, and that the names of
+.\" Digital and Tektronix not be used in in advertising or publicity pertaining
+.\" to this documentation without specific, written prior permission.
+.\" Digital and Tektronix makes no representations about the suitability
+.\" of this documentation for any purpose.
+.\" It is provided ``as is'' without express or implied warranty.
+.\"
+.\" $XFree86: xc/doc/man/X11/XQColor.man,v 1.4 2001/02/09 03:47:46 tsi Exp $
+.\"
+.ds xT X Toolkit Intrinsics \- C Language Interface
+.ds xW Athena X Widgets \- C Language X Toolkit Interface
+.ds xL Xlib \- C Language X Interface
+.ds xC Inter-Client Communication Conventions Manual
+.na
+.de Ds
+.nf
+.\\$1D \\$2 \\$1
+.ft 1
+.\".ps \\n(PS
+.\".if \\n(VS>=40 .vs \\n(VSu
+.\".if \\n(VS<=39 .vs \\n(VSp
+..
+.de De
+.ce 0
+.if \\n(BD .DF
+.nr BD 0
+.in \\n(OIu
+.if \\n(TM .ls 2
+.sp \\n(DDu
+.fi
+..
+.de FD
+.LP
+.KS
+.TA .5i 3i
+.ta .5i 3i
+.nf
+..
+.de FN
+.fi
+.KE
+.LP
+..
+.de IN \" send an index entry to the stderr
+..
+.de C{
+.KS
+.nf
+.D
+.\"
+.\" choose appropriate monospace font
+.\" the imagen conditional, 480,
+.\" may be changed to L if LB is too
+.\" heavy for your eyes...
+.\"
+.ie "\\*(.T"480" .ft L
+.el .ie "\\*(.T"300" .ft L
+.el .ie "\\*(.T"202" .ft PO
+.el .ie "\\*(.T"aps" .ft CW
+.el .ft R
+.ps \\n(PS
+.ie \\n(VS>40 .vs \\n(VSu
+.el .vs \\n(VSp
+..
+.de C}
+.DE
+.R
+..
+.de Pn
+.ie t \\$1\fB\^\\$2\^\fR\\$3
+.el \\$1\fI\^\\$2\^\fP\\$3
+..
+.de ZN
+.ie t \fB\^\\$1\^\fR\\$2
+.el \fI\^\\$1\^\fP\\$2
+..
+.de hN
+.ie t <\fB\\$1\fR>\\$2
+.el <\fI\\$1\fP>\\$2
+..
+.de NT
+.ne 7
+.ds NO Note
+.if \\n(.$>$1 .if !'\\$2'C' .ds NO \\$2
+.if \\n(.$ .if !'\\$1'C' .ds NO \\$1
+.ie n .sp
+.el .sp 10p
+.TB
+.ce
+\\*(NO
+.ie n .sp
+.el .sp 5p
+.if '\\$1'C' .ce 99
+.if '\\$2'C' .ce 99
+.in +5n
+.ll -5n
+.R
+..
+. \" Note End -- doug kraft 3/85
+.de NE
+.ce 0
+.in -5n
+.ll +5n
+.ie n .sp
+.el .sp 10p
+..
+.ny0
+.TH XQueryColor __libmansuffix__ __xorgversion__ "XLIB FUNCTIONS"
+.SH NAME
+XQueryColor, XQueryColors, XLookupColor, XParseColor \- obtain color values
+.SH SYNTAX
+.HP
+int XQueryColor\^(\^Display *\fIdisplay\fP\^, Colormap \fIcolormap\fP\^, XColor
+*\fIdef_in_out\fP\^);
+.HP
+int XQueryColors\^(\^Display *\fIdisplay\fP\^, Colormap \fIcolormap\fP\^,
+XColor \fIdefs_in_out\fP[\^]\^, int \fIncolors\fP\^);
+.HP
+Status XLookupColor\^(\^Display *\fIdisplay\fP\^, Colormap \fIcolormap\fP\^,
+char *\fIcolor_name\fP\^, XColor *\fIexact_def_return\fP\^, XColor
+*\fIscreen_def_return\fP\^);
+.HP
+Status XParseColor\^(\^Display *\fIdisplay\fP\^, Colormap \fIcolormap\fP\^,
+char *\fIspec\fP\^, XColor *\fIexact_def_return\fP\^);
+.SH ARGUMENTS
+.IP \fIcolormap\fP 1i
+Specifies the colormap.
+.IP \fIcolor_name\fP 1i
+Specifies the color name string (for example, red) whose color
+definition structure you want returned.
+.IP \fIdef_in_out\fP 1i
+Specifies and returns the RGB values for the pixel specified in the structure.
+.IP \fIdefs_in_out\fP 1i
+Specifies and returns an array of color definition structures for the pixel
+specified in the structure.
+.IP \fIdisplay\fP 1i
+Specifies the connection to the X server.
+.IP \fIexact_def_return\fP 1i
+Returns the exact RGB values.
+.IP \fIncolors\fP 1i
+.\"Specifies the number of color definition structures.
+Specifies the number of
+.ZN XColor
+structures in the color definition array.
+.IP \fIscreen_def_return\fP 1i
+Returns the closest RGB values provided by the hardware.
+.IP \fIspec\fP 1i
+Specifies the color name string;
+case is ignored.
+.IP \fIexact_def_return\fP 1i
+Returns the exact color value for later use and sets the
+.ZN DoRed ,
+.ZN DoGreen ,
+and
+.ZN DoBlue
+flags.
+.SH DESCRIPTION
+The
+.ZN XQueryColor
+function returns the current RGB value for the pixel in the
+.ZN XColor
+structure and sets the
+.ZN DoRed ,
+.ZN DoGreen ,
+and
+.ZN DoBlue
+flags.
+The
+.ZN XQueryColors
+function returns the RGB value for each pixel in each
+.ZN XColor
+structure and sets the
+.ZN DoRed ,
+.ZN DoGreen ,
+and
+.ZN DoBlue
+flags in each structure.
+
+.LP
+.ZN XQueryColor
+and
+.ZN XQueryColors
+can generate
+.ZN BadColor
+and
+.ZN BadValue
+errors.
+.LP
+The
+.ZN XLookupColor
+function looks up the string name of a color with respect to the screen
+associated with the specified colormap.
+It returns both the exact color values and
+the closest values provided by the screen
+with respect to the visual type of the specified colormap.
+If the color name is not in the Host Portable Character Encoding,
+the result is implementation-dependent.
+Use of uppercase or lowercase does not matter.
+.ZN XLookupColor
+returns nonzero if the name is resolved;
+otherwise, it returns zero.
+.LP
+The
+.ZN XParseColor
+function looks up the string name of a color with respect to the screen
+associated with the specified colormap.
+It returns the exact color value.
+If the color name is not in the Host Portable Character Encoding,
+the result is implementation-dependent.
+Use of uppercase or lowercase does not matter.
+.ZN XParseColor
+returns nonzero if the name is resolved;
+otherwise, it returns zero.
+.LP
+.ZN XLookupColor
+and
+.ZN XParseColor
+can generate
+.ZN BadColor
+error.
+.SH "COLOR NAMES"
+An RGB Device specification is identified by
+the prefix ``rgb:'' and conforms to the following syntax:
+.LP
+.\" Start marker code here
+.Ds 0
+rgb:\fI<red>/<green>/<blue>\fP
+
+ \fI<red>\fP, \fI<green>\fP, \fI<blue>\fP := \fIh\fP | \fIhh\fP | \fIhhh\fP | \fIhhhh\fP
+ \fIh\fP := single hexadecimal digits (case insignificant)
+.De
+.\" End marker code here
+.LP
+Note that \fIh\fP indicates the value scaled in 4 bits,
+\fIhh\fP the value scaled in 8 bits,
+\fIhhh\fP the value scaled in 12 bits,
+and \fIhhhh\fP the value scaled in 16 bits, respectively.
+.LP
+For backward compatibility, an older syntax for RGB Device is
+supported, but its continued use is not encouraged.
+The syntax is an initial sharp sign character followed by
+a numeric specification, in one of the following formats:
+.LP
+.TS
+l l.
+\&#RGB (4 bits each)
+\&#RRGGBB (8 bits each)
+\&#RRRGGGBBB (12 bits each)
+\&#RRRRGGGGBBBB (16 bits each)
+.TE
+.LP
+The R, G, and B represent single hexadecimal digits.
+When fewer than 16 bits each are specified,
+they represent the most significant bits of the value
+(unlike the ``rgb:'' syntax, in which values are scaled).
+For example, the string ``#3a7'' is the same as ``#3000a0007000''.
+.LP
+An RGB intensity specification is identified
+by the prefix ``rgbi:'' and conforms to the following syntax:
+.LP
+.\" Start marker code here
+.Ds 0
+rgbi:\fI<red>/<green>/<blue>\fP
+.De
+.\" End marker code here
+.LP
+Note that red, green, and blue are floating-point values
+between 0.0 and 1.0, inclusive.
+The input format for these values is an optional sign,
+a string of numbers possibly containing a decimal point,
+and an optional exponent field containing an E or e
+followed by a possibly signed integer string.
+.LP
+The standard device-independent string specifications have
+the following syntax:
+.LP
+.\" Start marker code here
+.Ds 0
+CIEXYZ:\fI<X>/<Y>/<Z>\fP
+CIEuvY:\fI<u>/<v>/<Y>\fP
+CIExyY:\fI<x>/<y>/<Y>\fP
+CIELab:\fI<L>/<a>/<b>\fP
+CIELuv:\fI<L>/<u>/<v>\fP
+TekHVC:\fI<H>/<V>/<C>\fP
+.De
+.\" End marker code here
+.LP
+All of the values (C, H, V, X, Y, Z, a, b, u, v, y, x) are
+floating-point values.
+The syntax for these values is an optional plus or minus sign,
+a string of digits possibly containing a decimal point,
+and an optional exponent field consisting of an ``E'' or ``e''
+followed by an optional plus or minus followed by a string of digits.
+.SH DIAGNOSTICS
+.TP 1i
+.ZN BadColor
+A value for a Colormap argument does not name a defined Colormap.
+.TP 1i
+.ZN BadValue
+Some numeric value falls outside the range of values accepted by the request.
+Unless a specific range is specified for an argument, the full range defined
+by the argument's type is accepted. Any argument defined as a set of
+alternatives can generate this error.
+.SH "SEE ALSO"
+XAllocColor(3X11),
+XCreateColormap(3X11),
+XStoreColors(3X11)
+.br
+\fI\*(xL\fP