257 lines
7.2 KiB
Groff
257 lines
7.2 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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.\" $XFree86: xc/doc/man/X11/XcmsAClr.man,v 3.3 2001/01/27 18:20:06 dawes Exp $
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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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.ny0
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.TH XcmsAllocColor __libmansuffix__ __xorgversion__ "XLIB FUNCTIONS"
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.SH NAME
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XcmsAllocColor, XcmsAllocNamedColor \- allocate colors
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.SH SYNTAX
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.HP
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Status XcmsAllocColor\^(\^Display *\fIdisplay\fP\^, Colormap \fIcolormap\fP\^,
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XcmsColor *\fIcolor_in_out\fP\^, XcmsColorFormat \fIresult_format\fP\^);
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.HP
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Status XcmsAllocNamedColor\^(\^Display *\fIdisplay\fP\^, Colormap
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\fIcolormap\fP\^, char *\fIcolor_string\fP\^, XcmsColor
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*\fIcolor_screen_return\fP\^, XcmsColor *\fIcolor_exact_return\fP\^, XcmsColorFormat \fIresult_format\fP\^);
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.SH ARGUMENTS
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.IP \fIdisplay\fP 1i
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Specifies the connection to the X server.
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.IP \fIcolormap\fP 1i
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Specifies the colormap.
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.IP \fIcolor_exact_return\fP 1i
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Returns the color specification parsed from the color string
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or parsed from the corresponding string found in a color-name database.
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.IP \fIcolor_in_out\fP 1i
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Specifies the color to allocate and returns the pixel and color
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that is actually used in the colormap.
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.IP \fIcolor_screen_return\fP 1i
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Returns the pixel value of the color cell and color specification
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that actually is stored for that cell.
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.ds St \ whose color definition structure is to be returned
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.IP \fIcolor_string\fP 1i
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Specifies the color string\*(St.
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.IP \fIresult_format\fP 1i
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Specifies the color format for the returned color specification.
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.SH DESCRIPTION
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The
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.ZN XcmsAllocColor
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function is similar to
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.ZN XAllocColor
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except the color can be specified in any format.
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The
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.ZN XcmsAllocColor
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function ultimately calls
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.ZN XAllocColor
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to allocate a read-only color cell (colormap entry) with the specified color.
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.ZN XcmsAllocColor
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first converts the color specified
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to an RGB value and then passes this to
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.ZN XAllocColor .
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.ZN XcmsAllocColor
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returns the pixel value of the color cell and the color specification
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actually allocated.
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This returned color specification is the result of converting the RGB value
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returned by
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.ZN XAllocColor
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into the format specified with the result_format argument.
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If there is no interest in a returned color specification,
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unnecessary computation can be bypassed if result_format is set to
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.ZN XcmsRGBFormat .
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The corresponding colormap cell is read-only.
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If this routine returns
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.ZN XcmsFailure ,
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the color_in_out color specification is left unchanged.
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.LP
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.ZN XcmsAllocColor
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can generate a
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.ZN BadColor
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errors.
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.LP
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The
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.ZN XcmsAllocNamedColor
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function is similar to
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.ZN XAllocNamedColor
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except that the color returned can be in any format specified.
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This function
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ultimately calls
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.ZN XAllocColor
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to allocate a read-only color cell with
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the color specified by a color string.
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The color string is parsed into an
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.ZN XcmsColor
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structure (see
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.ZN XcmsLookupColor ),
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converted
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to an RGB value, and finally passed to
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.ZN XAllocColor .
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If the color name is not in the Host Portable Character Encoding,
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the result is implementation-dependent.
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Use of uppercase or lowercase does not matter.
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.LP
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This function returns both the color specification as a result
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of parsing (exact specification) and the actual color specification
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stored (screen specification).
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This screen specification is the result of converting the RGB value
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returned by
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.ZN XAllocColor
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into the format specified in result_format.
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If there is no interest in a returned color specification,
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unnecessary computation can be bypassed if result_format is set to
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.ZN XcmsRGBFormat .
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If color_screen_return and color_exact_return
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point to the same structure, the pixel field will be set correctly,
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but the color values are undefined.
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.LP
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.LP
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.ZN XcmsAllocNamedColor
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can generate a
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.ZN BadColor
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errors.
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.SH DIAGNOSTICS
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.TP 1i
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.ZN BadColor
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A value for a Colormap argument does not name a defined Colormap.
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.SH "SEE ALSO"
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XcmsQueryColor(3X11),
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XcmsStoreColor(3X11)
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.br
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\fI\*(xL\fP
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