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cac6572701
It was a temptation to presentation-level klugery and is best gone. Signed-off-by: Eric S. Raymond <esr@thyrsus.com>
300 lines
8.0 KiB
Groff
300 lines
8.0 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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.\" 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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.\" 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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.ny0
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.TH XcmsStoreColor __libmansuffix__ __xorgversion__ "XLIB FUNCTIONS"
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.SH NAME
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XcmsStoreColor, XcmsStoreColors \- set colors
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.SH SYNTAX
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.HP
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Status XcmsStoreColor\^(\^Display *\fIdisplay\fP\^, Colormap \fIcolormap\fP\^,
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XcmsColor *\fIcolor\fP\^);
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.HP
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Status XcmsStoreColors\^(\^Display *\fIdisplay\fP\^, Colormap
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\fIcolormap\fP\^, XcmsColor \fIcolors\fP\^[\^]\^, int \fIncolors\fP\^, Bool
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\fIcompression_flags_return\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 \fIcolor\fP 1i
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Specifies the color cell and the color to store.
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Values specified in this
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.ZN XcmsColor
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structure remain unchanged on return.
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.IP \fIcolors\fP 1i
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Specifies the color specification array of
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.ZN XcmsColor
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structures, each specifying a color cell and the color to store in that
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cell.
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Values specified in the array remain unchanged upon return.
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.IP \fIcolormap\fP 1i
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Specifies the colormap.
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.IP \fIcompression_flags_return\fP 1i
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Returns an array of Boolean values indicating compression status.
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If a non-NULL pointer is supplied,
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each element of the array is set to
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.ZN True
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if the corresponding color was compressed and
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.ZN False
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otherwise.
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Pass NULL if the compression status is not useful.
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.IP \fIncolors\fP 1i
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Specifies the number of
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.ZN XcmsColor
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structures in the color-specification array.
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.SH DESCRIPTION
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The
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.ZN XcmsStoreColor
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function converts the color specified in the
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.ZN XcmsColor
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structure into RGB values.
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It then uses this RGB specification in an
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.ZN XColor
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structure, whose three flags
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.Pn ( DoRed ,
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.ZN DoGreen ,
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and
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.ZN DoBlue )
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are set, in a call to
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.ZN XStoreColor
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to change the color cell specified by the pixel member of the
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.ZN XcmsColor
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structure.
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This pixel value must be a valid index for the specified colormap,
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and the color cell specified by the pixel value must be a read/write cell.
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If the pixel value is not a valid index, a
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.ZN BadValue
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error results.
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If the color cell is unallocated or is allocated read-only, a
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.ZN BadAccess
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error results.
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If the colormap is an installed map for its screen,
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the changes are visible immediately.
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.LP
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Note that
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.ZN XStoreColor
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has no return value; therefore, an
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.ZN XcmsSuccess
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return value from this function indicates that the conversion
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to RGB succeeded and the call to
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.ZN XStoreColor
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was made.
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To obtain the actual color stored, use
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.ZN XcmsQueryColor .
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Because of the screen's hardware limitations or gamut compression,
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the color stored in the colormap may not be identical
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to the color specified.
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.LP
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.ZN XcmsStoreColor
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can generate
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.ZN BadAccess ,
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.ZN BadColor ,
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and
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.ZN BadValue
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errors.
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.LP
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The
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.ZN XcmsStoreColors
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function converts the colors specified in the array of
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.ZN XcmsColor
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structures into RGB values and then uses these RGB specifications in
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.ZN XColor
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structures, whose three flags
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.Pn ( DoRed ,
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.ZN DoGreen ,
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and
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.ZN DoBlue )
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are set, in a call to
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.ZN XStoreColors
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to change the color cells specified by the pixel member of the corresponding
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.ZN XcmsColor
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structure.
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Each pixel value must be a valid index for the specified colormap,
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and the color cell specified by each pixel value must be a read/write cell.
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If a pixel value is not a valid index, a
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.ZN BadValue
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error results.
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If a color cell is unallocated or is allocated read-only, a
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.ZN BadAccess
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error results.
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If more than one pixel is in error,
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the one that gets reported is arbitrary.
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If the colormap is an installed map for its screen,
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the changes are visible immediately.
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.LP
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Note that
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.ZN XStoreColors
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has no return value; therefore, an
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.ZN XcmsSuccess
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return value from this function indicates that conversions
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to RGB succeeded and the call to
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.ZN XStoreColors
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was made.
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To obtain the actual colors stored, use
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.ZN XcmsQueryColors .
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Because of the screen's hardware limitations or gamut compression,
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the colors stored in the colormap may not be identical
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to the colors specified.
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.LP
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.LP
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.ZN XcmsStoreColors
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can generate
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.ZN BadAccess ,
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.ZN BadColor ,
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and
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.ZN BadValue
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errors.
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.SH DIAGNOSTICS
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.TP 1i
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.ZN BadAccess
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A client attempted
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to free a color map entry that it did not already allocate.
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.TP 1i
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.ZN BadAccess
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A client attempted
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to store into a read-only color map entry.
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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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.TP 1i
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.ZN BadValue
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Some numeric value falls outside the range of values accepted by the request.
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Unless a specific range is specified for an argument, the full range defined
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by the argument's type is accepted. Any argument defined as a set of
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alternatives can generate this error.
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.SH "SEE ALSO"
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XcmsAllocColor(__libmansuffix__),
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XcmsQueryColor(__libmansuffix__)
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.br
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\fI\*(xL\fP
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