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author | marha <marha@users.sourceforge.net> | 2012-08-27 08:17:50 +0200 |
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committer | marha <marha@users.sourceforge.net> | 2012-09-04 14:23:00 +0200 |
commit | 02b914d3b9b658a16e17cf2d95deede75dbbacc9 (patch) | |
tree | 3757711ab3e1db8e1b59877354096503d9635112 /libX11/man/XAllocColor.man | |
parent | f479a5fc7f844d96b169c399cb1e8ac085de6c2b (diff) | |
download | vcxsrv-02b914d3b9b658a16e17cf2d95deede75dbbacc9.tar.gz vcxsrv-02b914d3b9b658a16e17cf2d95deede75dbbacc9.tar.bz2 vcxsrv-02b914d3b9b658a16e17cf2d95deede75dbbacc9.zip |
xwininfo fontconfig libX11 libXau libXext libxcb mesa pixman
xkeyboard-config git update 27 Aug 2012
Diffstat (limited to 'libX11/man/XAllocColor.man')
-rw-r--r-- | libX11/man/XAllocColor.man | 833 |
1 files changed, 386 insertions, 447 deletions
diff --git a/libX11/man/XAllocColor.man b/libX11/man/XAllocColor.man index 1f04d6e57..7b21b5639 100644 --- a/libX11/man/XAllocColor.man +++ b/libX11/man/XAllocColor.man @@ -1,447 +1,386 @@ -'\" e
-.\" 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.
-.\"
-.\"
-.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
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-.nr BD 0
-.in \\n(OIu
-.if \\n(TM .ls 2
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-..
-.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
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-.ie \\n(VS>40 .vs \\n(VSu
-.el .vs \\n(VSp
-..
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-.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
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-..
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-.ie t <\fB\\$1\fR>\\$2
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-.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
-'\" e
-.TH XAllocColor __libmansuffix__ __xorgversion__ "XLIB FUNCTIONS"
-.SH NAME
-XAllocColor, XAllocNamedColor, XAllocColorCells, XAllocColorPlanes, XFreeColors \- allocate and free colors
-.SH SYNTAX
-.HP
-Status XAllocColor\^(\^Display *\fIdisplay\fP, Colormap \fIcolormap\fP\^,
-XColor *\fIscreen_in_out\fP\^);
-.HP
-Status XAllocNamedColor\^(\^Display *\fIdisplay\fP, Colormap \fIcolormap\fP\^,
-char *\fIcolor_name\fP\^, XColor *\fIscreen_def_return\fP\^, XColor
-*\fIexact_def_return\fP\^);
-.HP
-Status XAllocColorCells\^(\^Display *\fIdisplay\fP, Colormap \fIcolormap\fP\^,
-Bool \fIcontig\fP\^, unsigned long \fIplane_masks_return\fP[\^]\^, unsigned int
-\fInplanes\fP\^, unsigned long \fIpixels_return\fP[\^]\^, unsigned int
-\fInpixels\fP\^);
-.HP
-Status XAllocColorPlanes\^(\^Display *\fIdisplay\fP, Colormap
-\fIcolormap\fP\^, Bool \fIcontig\fP\^, unsigned long
-\fIpixels_return\fP[\^]\^, int \fIncolors\fP\^, int \fInreds\fP\^, int
-\fIngreens\fP\^, int \fInblues\fP\^, unsigned long *\fIrmask_return\fP\^,
-unsigned long *\fIgmask_return\fP\^, unsigned long *\fIbmask_return\fP\^);
-.HP
-int XFreeColors\^(\^Display *\fIdisplay\fP, Colormap \fIcolormap\fP\^, unsigned
-long \fIpixels\fP\^[\^], int \fInpixels\fP\^, unsigned long \fIplanes\fP\^);
-.IP \fIcolor_name\fP 1i
-Specifies the color name string (for example, red) whose color
-definition structure you want returned.
-.IP \fIcolormap\fP 1i
-Specifies the colormap.
-.IP \fIcontig\fP 1i
-Specifies a Boolean value that indicates whether the planes must be contiguous.
-.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 pixel values that are to be returned in the
-pixels_return array.
-.IP \fInpixels\fP 1i
-Specifies the number of pixels.
-.IP \fInplanes\fP 1i
-Specifies the number of plane masks that are to be returned in the plane masks
-array.
-.IP \fInreds\fP 1i
-.br
-.ns
-.IP \fIngreens\fP 1i
-.br
-.ns
-.IP \fInblues\fP 1i
-.br
-.ns
-Specify the number of red, green, and blue planes.
-The value you pass must be nonnegative.
-.IP \fIpixels\fP 1i
-Specifies an array of pixel values.
-.IP \fIpixels_return\fP 1i
-Returns an array of pixel values.
-.IP \fIplane_mask_return\fP 1i
-Returns an array of plane masks.
-.\" *** JIM: NEED MORE INFO FOR THIS. ***
-.IP \fIplanes\fP 1i
-Specifies the planes you want to free.
-.IP \fIrmask_return\fP 1i
-.br
-.ns
-.IP \fIgmask_return\fP 1i
-.br
-.ns
-.IP \fIbmask_return\fP 1i
-Return bit masks for the red, green, and blue planes.
-.IP \fIscreen_def_return\fP 1i
-Returns the closest RGB values provided by the hardware.
-.IP \fIscreen_in_out\fP 1i
-Specifies and returns the values actually used in the colormap.
-.SH DESCRIPTION
-The
-.ZN XAllocColor
-function allocates a read-only colormap entry corresponding to the closest
-RGB value supported by the hardware.
-.ZN XAllocColor
-returns the pixel value of the color closest to the specified
-RGB elements supported by the hardware
-and returns the RGB value actually used.
-The corresponding colormap cell is read-only.
-In addition,
-.ZN XAllocColor
-returns nonzero if it succeeded or zero if it failed.
-.IN "Color map"
-.IN "Color" "allocation"
-.IN "Allocation" "colormap"
-.IN "read-only colormap cells"
-Multiple clients that request the same effective RGB value can be assigned
-the same read-only entry, thus allowing entries to be shared.
-When the last client deallocates a shared cell, it is deallocated.
-.ZN XAllocColor
-does not use or affect the flags in the
-.ZN XColor
-structure.
-.LP
-.ZN XAllocColor
-can generate a
-.ZN BadColor
-error.
-.LP
-The
-.ZN XAllocNamedColor
-function looks up the named color with respect to the screen that is
-associated with the specified colormap.
-It returns both the exact database definition and
-the closest color supported by the screen.
-The allocated color cell is read-only.
-The pixel value is returned in screen_def_return.
-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.
-If screen_def_return and exact_def_return
-point to the same structure, the pixel field will be set correctly,
-but the color values are undefined.
-.ZN XAllocNamedColor
-returns nonzero if a cell is allocated;
-otherwise, it returns zero.
-.LP
-.ZN XAllocNamedColor
-can generate a
-.ZN BadColor
-error.
-.LP
-.EQ
-delim %%
-.EN
-The
-.ZN XAllocColorCells
-function allocates read/write color cells.
-The number of colors must be positive and the number of planes nonnegative,
-or a
-.ZN BadValue
-error results.
-If ncolors and nplanes are requested,
-then ncolors pixels
-and nplane plane masks are returned.
-No mask will have any bits set to 1 in common with
-any other mask or with any of the pixels.
-By ORing together each pixel with zero or more masks,
-ncolors * %2 sup nplanes% distinct pixels can be produced.
-All of these are
-allocated writable by the request.
-For
-.ZN GrayScale
-or
-.ZN PseudoColor ,
-each mask has exactly one bit set to 1.
-For
-.ZN DirectColor ,
-each has exactly three bits set to 1.
-If contig is
-.ZN True
-and if all masks are ORed
-together, a single contiguous set of bits set to 1 will be formed for
-.ZN GrayScale
-or
-.ZN PseudoColor
-and three contiguous sets of bits set to 1 (one within each
-pixel subfield) for
-.ZN DirectColor .
-The RGB values of the allocated
-entries are undefined.
-.ZN XAllocColorCells
-returns nonzero if it succeeded or zero if it failed.
-.LP
-.ZN XAllocColorCells
-can generate
-.ZN BadColor
-and
-.ZN BadValue
-errors.
-.LP
-.EQ
-delim %%
-.EN
-The specified ncolors must be positive;
-and nreds, ngreens, and nblues must be nonnegative,
-or a
-.ZN BadValue
-error results.
-If ncolors colors, nreds reds, ngreens greens, and nblues blues are requested,
-ncolors pixels are returned; and the masks have nreds, ngreens, and
-nblues bits set to 1, respectively.
-If contig is
-.ZN True ,
-each mask will have
-a contiguous set of bits set to 1.
-No mask will have any bits set to 1 in common with
-any other mask or with any of the pixels.
-For
-.ZN DirectColor ,
-each mask
-will lie within the corresponding pixel subfield.
-By ORing together
-subsets of masks with each pixel value,
-ncolors * %2 sup (nreds+ngreens+nblues)% distinct pixel values can be produced.
-All of these are allocated by the request.
-However, in the
-colormap, there are only ncolors * %2 sup nreds% independent red entries,
-ncolors * %2 sup ngreens% independent green entries,
-and ncolors * %2 sup nblues% independent blue entries.
-This is true even for
-.ZN PseudoColor .
-When the colormap entry of a pixel
-value is changed (using
-.ZN XStoreColors ,
-.ZN XStoreColor ,
-or
-.ZN XStoreNamedColor ),
-the pixel is decomposed according to the masks,
-and the corresponding independent entries are updated.
-.ZN XAllocColorPlanes
-returns nonzero if it succeeded or zero if it failed.
-.LP
-.ZN XAllocColorPlanes
-can generate
-.ZN BadColor
-and
-.ZN BadValue
-errors.
-.LP
-The
-.ZN XFreeColors
-function frees the cells represented by pixels whose values are in the
-pixels array.
-The planes argument should not have any bits set to 1 in common with any of the
-pixels.
-The set of all pixels is produced by ORing together subsets of
-the planes argument with the pixels.
-The request frees all of these pixels that
-were allocated by the client (using
-.IN XAllocColor
-.IN XAllocNamedColor
-.IN XAllocColorCells
-.IN XAllocColorPlanes
-.ZN XAllocColor ,
-.ZN XAllocNamedColor ,
-.ZN XAllocColorCells ,
-and
-.ZN XAllocColorPlanes ).
-Note that freeing an
-individual pixel obtained from
-.ZN XAllocColorPlanes
-may not actually allow
-it to be reused until all of its related pixels are also freed.
-Similarly,
-a read-only entry is not actually freed until it has been freed by all clients,
-and if a client allocates the same read-only entry multiple times,
-it must free the entry that many times before the entry is actually freed.
-.LP
-All specified pixels that are allocated by the client in the colormap are
-freed, even if one or more pixels produce an error.
-If a specified pixel is not a valid index into the colormap, a
-.ZN BadValue
-error results.
-If a specified pixel is not allocated by the
-client (that is, is unallocated or is only allocated by another client)
-or if the colormap was created with all entries writable (by passing
-.ZN AllocAll
-to
-.ZN XCreateColormap ),
-a
-.ZN BadAccess
-error results.
-If more than one pixel is in error,
-the one that gets reported is arbitrary.
-.LP
-.ZN XFreeColors
-can generate
-.ZN BadAccess ,
-.ZN BadColor ,
-and
-.ZN BadValue
-errors.
-.SH DIAGNOSTICS
-.TP 1i
-.ZN BadAccess
-A client attempted
-to free a color map entry that it did not already allocate.
-.TP 1i
-.ZN BadAccess
-A client attempted
-to store into a read-only color map entry.
-.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"
-XCreateColormap(__libmansuffix__),
-XQueryColor(__libmansuffix__),
-XStoreColors(__libmansuffix__)
-.br
-\fI\*(xL\fP
+'\" e +.\" 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. +.\" +.\" +.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 CW +.\".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 IN \" send an index entry to the stderr +.. +.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 +.. +.ny0 +'\" e +.TH XAllocColor __libmansuffix__ __xorgversion__ "XLIB FUNCTIONS" +.SH NAME +XAllocColor, XAllocNamedColor, XAllocColorCells, XAllocColorPlanes, XFreeColors \- allocate and free colors +.SH SYNTAX +.HP +Status XAllocColor\^(\^Display *\fIdisplay\fP, Colormap \fIcolormap\fP\^, +XColor *\fIscreen_in_out\fP\^); +.HP +Status XAllocNamedColor\^(\^Display *\fIdisplay\fP, Colormap \fIcolormap\fP\^, +char *\fIcolor_name\fP\^, XColor *\fIscreen_def_return\fP\^, XColor +*\fIexact_def_return\fP\^); +.HP +Status XAllocColorCells\^(\^Display *\fIdisplay\fP, Colormap \fIcolormap\fP\^, +Bool \fIcontig\fP\^, unsigned long \fIplane_masks_return\fP[\^]\^, unsigned int +\fInplanes\fP\^, unsigned long \fIpixels_return\fP[\^]\^, unsigned int +\fInpixels\fP\^); +.HP +Status XAllocColorPlanes\^(\^Display *\fIdisplay\fP, Colormap +\fIcolormap\fP\^, Bool \fIcontig\fP\^, unsigned long +\fIpixels_return\fP[\^]\^, int \fIncolors\fP\^, int \fInreds\fP\^, int +\fIngreens\fP\^, int \fInblues\fP\^, unsigned long *\fIrmask_return\fP\^, +unsigned long *\fIgmask_return\fP\^, unsigned long *\fIbmask_return\fP\^); +.HP +int XFreeColors\^(\^Display *\fIdisplay\fP, Colormap \fIcolormap\fP\^, unsigned +long \fIpixels\fP\^[\^], int \fInpixels\fP\^, unsigned long \fIplanes\fP\^); +.IP \fIcolor_name\fP 1i +Specifies the color name string (for example, red) whose color +definition structure you want returned. +.IP \fIcolormap\fP 1i +Specifies the colormap. +.IP \fIcontig\fP 1i +Specifies a Boolean value that indicates whether the planes must be contiguous. +.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 pixel values that are to be returned in the +pixels_return array. +.IP \fInpixels\fP 1i +Specifies the number of pixels. +.IP \fInplanes\fP 1i +Specifies the number of plane masks that are to be returned in the plane masks +array. +.IP \fInreds\fP 1i +.br +.ns +.IP \fIngreens\fP 1i +.br +.ns +.IP \fInblues\fP 1i +.br +.ns +Specify the number of red, green, and blue planes. +The value you pass must be nonnegative. +.IP \fIpixels\fP 1i +Specifies an array of pixel values. +.IP \fIpixels_return\fP 1i +Returns an array of pixel values. +.IP \fIplane_mask_return\fP 1i +Returns an array of plane masks. +.\" *** JIM: NEED MORE INFO FOR THIS. *** +.IP \fIplanes\fP 1i +Specifies the planes you want to free. +.IP \fIrmask_return\fP 1i +.br +.ns +.IP \fIgmask_return\fP 1i +.br +.ns +.IP \fIbmask_return\fP 1i +Return bit masks for the red, green, and blue planes. +.IP \fIscreen_def_return\fP 1i +Returns the closest RGB values provided by the hardware. +.IP \fIscreen_in_out\fP 1i +Specifies and returns the values actually used in the colormap. +.SH DESCRIPTION +The +.ZN XAllocColor +function allocates a read-only colormap entry corresponding to the closest +RGB value supported by the hardware. +.ZN XAllocColor +returns the pixel value of the color closest to the specified +RGB elements supported by the hardware +and returns the RGB value actually used. +The corresponding colormap cell is read-only. +In addition, +.ZN XAllocColor +returns nonzero if it succeeded or zero if it failed. +.IN "Color map" +.IN "Color" "allocation" +.IN "Allocation" "colormap" +.IN "read-only colormap cells" +Multiple clients that request the same effective RGB value can be assigned +the same read-only entry, thus allowing entries to be shared. +When the last client deallocates a shared cell, it is deallocated. +.ZN XAllocColor +does not use or affect the flags in the +.ZN XColor +structure. +.LP +.ZN XAllocColor +can generate a +.ZN BadColor +error. +.LP +The +.ZN XAllocNamedColor +function looks up the named color with respect to the screen that is +associated with the specified colormap. +It returns both the exact database definition and +the closest color supported by the screen. +The allocated color cell is read-only. +The pixel value is returned in screen_def_return. +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. +If screen_def_return and exact_def_return +point to the same structure, the pixel field will be set correctly, +but the color values are undefined. +.ZN XAllocNamedColor +returns nonzero if a cell is allocated; +otherwise, it returns zero. +.LP +.ZN XAllocNamedColor +can generate a +.ZN BadColor +error. +.LP +.EQ +delim %% +.EN +The +.ZN XAllocColorCells +function allocates read/write color cells. +The number of colors must be positive and the number of planes nonnegative, +or a +.ZN BadValue +error results. +If ncolors and nplanes are requested, +then ncolors pixels +and nplane plane masks are returned. +No mask will have any bits set to 1 in common with +any other mask or with any of the pixels. +By ORing together each pixel with zero or more masks, +ncolors * %2 sup nplanes% distinct pixels can be produced. +All of these are +allocated writable by the request. +For +.ZN GrayScale +or +.ZN PseudoColor , +each mask has exactly one bit set to 1. +For +.ZN DirectColor , +each has exactly three bits set to 1. +If contig is +.ZN True +and if all masks are ORed +together, a single contiguous set of bits set to 1 will be formed for +.ZN GrayScale +or +.ZN PseudoColor +and three contiguous sets of bits set to 1 (one within each +pixel subfield) for +.ZN DirectColor . +The RGB values of the allocated +entries are undefined. +.ZN XAllocColorCells +returns nonzero if it succeeded or zero if it failed. +.LP +.ZN XAllocColorCells +can generate +.ZN BadColor +and +.ZN BadValue +errors. +.LP +.EQ +delim %% +.EN +The specified ncolors must be positive; +and nreds, ngreens, and nblues must be nonnegative, +or a +.ZN BadValue +error results. +If ncolors colors, nreds reds, ngreens greens, and nblues blues are requested, +ncolors pixels are returned; and the masks have nreds, ngreens, and +nblues bits set to 1, respectively. +If contig is +.ZN True , +each mask will have +a contiguous set of bits set to 1. +No mask will have any bits set to 1 in common with +any other mask or with any of the pixels. +For +.ZN DirectColor , +each mask +will lie within the corresponding pixel subfield. +By ORing together +subsets of masks with each pixel value, +ncolors * %2 sup (nreds+ngreens+nblues)% distinct pixel values can be produced. +All of these are allocated by the request. +However, in the +colormap, there are only ncolors * %2 sup nreds% independent red entries, +ncolors * %2 sup ngreens% independent green entries, +and ncolors * %2 sup nblues% independent blue entries. +This is true even for +.ZN PseudoColor . +When the colormap entry of a pixel +value is changed (using +.ZN XStoreColors , +.ZN XStoreColor , +or +.ZN XStoreNamedColor ), +the pixel is decomposed according to the masks, +and the corresponding independent entries are updated. +.ZN XAllocColorPlanes +returns nonzero if it succeeded or zero if it failed. +.LP +.ZN XAllocColorPlanes +can generate +.ZN BadColor +and +.ZN BadValue +errors. +.LP +The +.ZN XFreeColors +function frees the cells represented by pixels whose values are in the +pixels array. +The planes argument should not have any bits set to 1 in common with any of the +pixels. +The set of all pixels is produced by ORing together subsets of +the planes argument with the pixels. +The request frees all of these pixels that +were allocated by the client (using +.IN XAllocColor +.IN XAllocNamedColor +.IN XAllocColorCells +.IN XAllocColorPlanes +.ZN XAllocColor , +.ZN XAllocNamedColor , +.ZN XAllocColorCells , +and +.ZN XAllocColorPlanes ). +Note that freeing an +individual pixel obtained from +.ZN XAllocColorPlanes +may not actually allow +it to be reused until all of its related pixels are also freed. +Similarly, +a read-only entry is not actually freed until it has been freed by all clients, +and if a client allocates the same read-only entry multiple times, +it must free the entry that many times before the entry is actually freed. +.LP +All specified pixels that are allocated by the client in the colormap are +freed, even if one or more pixels produce an error. +If a specified pixel is not a valid index into the colormap, a +.ZN BadValue +error results. +If a specified pixel is not allocated by the +client (that is, is unallocated or is only allocated by another client) +or if the colormap was created with all entries writable (by passing +.ZN AllocAll +to +.ZN XCreateColormap ), +a +.ZN BadAccess +error results. +If more than one pixel is in error, +the one that gets reported is arbitrary. +.LP +.ZN XFreeColors +can generate +.ZN BadAccess , +.ZN BadColor , +and +.ZN BadValue +errors. +.SH DIAGNOSTICS +.TP 1i +.ZN BadAccess +A client attempted +to free a color map entry that it did not already allocate. +.TP 1i +.ZN BadAccess +A client attempted +to store into a read-only color map entry. +.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" +XCreateColormap(__libmansuffix__), +XQueryColor(__libmansuffix__), +XStoreColors(__libmansuffix__) +.br +\fI\*(xL\fP |