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Diffstat (limited to 'libX11/man/XAllocStandardColormap.man')
| -rw-r--r-- | libX11/man/XAllocStandardColormap.man | 810 |
1 files changed, 405 insertions, 405 deletions
diff --git a/libX11/man/XAllocStandardColormap.man b/libX11/man/XAllocStandardColormap.man index 813e89329..f27b643a4 100644 --- a/libX11/man/XAllocStandardColormap.man +++ b/libX11/man/XAllocStandardColormap.man @@ -1,405 +1,405 @@ -'\" 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. -.\" -.\" -.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 -'\" t -.TH XAllocStandardColormap __libmansuffix__ __xorgversion__ "XLIB FUNCTIONS" -.SH NAME -XAllocStandardColormap, XSetRGBColormaps, XGetRGBColormaps, XStandardColormap \- allocate, set, or read a standard colormap structure -.SH SYNTAX -.HP -XStandardColormap *XAllocStandardColormap\^(void\^); -.HP -void XSetRGBColormaps\^(\^Display *\fIdisplay\fP, Window \fIw\fP, -XStandardColormap *\fIstd_colormap\fP, -int \fIcount\fP, Atom \fIproperty\fP\^); -.HP -Status XGetRGBColormaps\^(\^Display *\fIdisplay\fP, Window \fIw\fP, -XStandardColormap **\fIstd_colormap_return\fP, int *\fIcount_return\fP, -Atom \fIproperty\fP\^); -.SH ARGUMENTS -.IP \fIdisplay\fP 1i -Specifies the connection to the X server. -.ds Cn colormaps -.IP \fIcount\fP 1i -Specifies the number of \*(Cn. -.ds Cn colormaps -.IP \fIcount_return\fP 1i -Returns the number of \*(Cn. -.IP \fIproperty\fP 1i -Specifies the property name. -.IP \fIstd_colormap\fP 1i -Specifies the -.ZN XStandardColormap -structure to be used. -.IP \fIstd_colormap_return\fP 1i -Returns the -.ZN XStandardColormap -structure. -.SH DESCRIPTION -The -.ZN XAllocStandardColormap -function allocates and returns a pointer to a -.ZN XStandardColormap -structure. -Note that all fields in the -.ZN XStandardColormap -structure are initially set to zero. -If insufficient memory is available, -.ZN XAllocStandardColormap -returns NULL. -To free the memory allocated to this structure, -use -.ZN XFree . -.LP -The -.ZN XSetRGBColormaps -function replaces the RGB colormap definition in the specified property -on the named window. -If the property does not already exist, -.ZN XSetRGBColormaps -sets the RGB colormap definition in the specified property -on the named window. -The property is stored with a type of RGB_COLOR_MAP and a format of 32. -Note that it is the caller's responsibility to honor the ICCCM -restriction that only RGB_DEFAULT_MAP contain more than one definition. -.LP -The -.ZN XSetRGBColormaps -function usually is only used by window or session managers. -To create a standard colormap, -follow this procedure: -.IP 1. 5 -Open a new connection to the same server. -.IP 2. 5 -Grab the server. -.IP 3. 5 -See if the property is on the property list of the root window for the screen. -.IP 4. 5 -If the desired property is not present: -.RS -.IP \(bu 5 -Create a colormap (unless you are using the default colormap of the screen). -.IP \(bu 5 -Determine the color characteristics of the visual. -.IP \(bu 5 -Allocate cells in the colormap (or create it with -.ZN AllocAll ). -.IP \(bu 5 -Call -.ZN XStoreColors -to store appropriate color values in the colormap. -.IP \(bu 5 -Fill in the descriptive members in the -.ZN XStandardColormap -structure. -.IP \(bu 5 -Attach the property to the root window. -.IP \(bu 5 -Use -.ZN XSetCloseDownMode -to make the resource permanent. -.RE -.IP 5. 5 -Ungrab the server. -.LP -.ZN XSetRGBColormaps -can generate -.ZN BadAlloc , -.ZN BadAtom , -and -.ZN BadWindow -errors. -.LP -The -.ZN XGetRGBColormaps -function returns the RGB colormap definitions stored -in the specified property on the named window. -If the property exists, is of type RGB_COLOR_MAP, is of format 32, -and is long enough to contain a colormap definition, -.ZN XGetRGBColormaps -allocates and fills in space for the returned colormaps -and returns a nonzero status. -If the visualid is not present, -.ZN XGetRGBColormaps -assumes the default visual for the screen on which the window is located; -if the killid is not present, -.ZN None -is assumed, which indicates that the resources cannot be released. -Otherwise, -none of the fields are set, and -.ZN XGetRGBColormaps -returns a zero status. -Note that it is the caller's responsibility to honor the ICCCM -restriction that only RGB_DEFAULT_MAP contain more than one definition. -.LP -.ZN XGetRGBColormaps -can generate -.ZN BadAtom -and -.ZN BadWindow -errors. -.SH STRUCTURES -The -.ZN XStandardColormap -structure contains: -.LP -/\&* Hints */ -.TS -lw(.5i) lw(2i) lw(1i). -T{ -\&#define -T} T{ -.ZN ReleaseByFreeingColormap -T} T{ -( (XID) 1L) -T} -.TE -/\&* Values */ -.IN "XStandardColormap" "" "@DEF@" -.Ds 0 -.TA .5i 2.5i -.ta .5i 2.5i -typedef struct { - Colormap colormap; - unsigned long red_max; - unsigned long red_mult; - unsigned long green_max; - unsigned long green_mult; - unsigned long blue_max; - unsigned long blue_mult; - unsigned long base_pixel; - VisualID visualid; - XID killid; -} XStandardColormap; -.De -.LP -The colormap member is the colormap created by the -.ZN XCreateColormap -function. -The red_max, green_max, and blue_max members give the maximum -red, green, and blue values, respectively. -Each color coefficient ranges from zero to its max, inclusive. -For example, -a common colormap allocation is 3/3/2 (3 planes for red, 3 -planes for green, and 2 planes for blue). -This colormap would have red_max = 7, green_max = 7, -and blue_max = 3. -An alternate allocation that uses only 216 colors is red_max = 5, -green_max = 5, and blue_max = 5. -.LP -The red_mult, green_mult, and blue_mult members give the -scale factors used to compose a full pixel value. -(See the discussion of the base_pixel members for further information.) -For a 3/3/2 allocation, red_mult might be 32, -green_mult might be 4, and blue_mult might be 1. -For a 6-colors-each allocation, red_mult might be 36, -green_mult might be 6, and blue_mult might be 1. -.LP -The base_pixel member gives the base pixel value used to -compose a full pixel value. -Usually, the base_pixel is obtained from a call to the -.ZN XAllocColorPlanes -function. -Given integer red, green, and blue coefficients in their appropriate -ranges, one then can compute a corresponding pixel value by -using the following expression: -.LP -.Ds -.TA .5i 1.5i -.ta .5i 1.5i -(r * red_mult + g * green_mult + b * blue_mult + base_pixel) & 0xFFFFFFFF -.De -.LP -For -.ZN GrayScale -colormaps, -only the colormap, red_max, red_mult, -and base_pixel members are defined. -The other members are ignored. -To compute a -.ZN GrayScale -pixel value, use the following expression: -.LP -.Ds -.TA .5i 1.5i -.ta .5i 1.5i -(gray * red_mult + base_pixel) & 0xFFFFFFFF -.De -.LP -Negative multipliers can be represented by converting the 2's -complement representation of the multiplier into an unsigned long and -storing the result in the appropriate _mult field. -The step of masking by 0xFFFFFFFF effectively converts the resulting -positive multiplier into a negative one. -The masking step will take place automatically on many machine architectures, -depending on the size of the integer type used to do the computation, -.LP -The visualid member gives the ID number of the visual from which the -colormap was created. -The killid member gives a resource ID that indicates whether -the cells held by this standard colormap are to be released -by freeing the colormap ID or by calling the -.ZN XKillClient -function on the indicated resource. -(Note that this method is necessary for allocating out of an existing colormap.) -.LP -The properties containing the -.ZN XStandardColormap -information have -the type RGB_COLOR_MAP. -.SH DIAGNOSTICS -.TP 1i -.ZN BadAlloc -The server failed to allocate the requested resource or server memory. -.TP 1i -.ZN BadAtom -A value for an Atom argument does not name a defined Atom. -.TP 1i -.ZN BadWindow -A value for a Window argument does not name a defined Window. -.SH "SEE ALSO" -XAllocColor(__libmansuffix__), -XCreateColormap(__libmansuffix__), -XFree(__libmansuffix__), -XSetCloseDownMode(__libmansuffix__) -.br -\fI\*(xL\fP +'\" 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.
+.\"
+.\"
+.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
+'\" t
+.TH XAllocStandardColormap __libmansuffix__ __xorgversion__ "XLIB FUNCTIONS"
+.SH NAME
+XAllocStandardColormap, XSetRGBColormaps, XGetRGBColormaps, XStandardColormap \- allocate, set, or read a standard colormap structure
+.SH SYNTAX
+.HP
+XStandardColormap *XAllocStandardColormap\^(void\^);
+.HP
+void XSetRGBColormaps\^(\^Display *\fIdisplay\fP, Window \fIw\fP,
+XStandardColormap *\fIstd_colormap\fP,
+int \fIcount\fP, Atom \fIproperty\fP\^);
+.HP
+Status XGetRGBColormaps\^(\^Display *\fIdisplay\fP, Window \fIw\fP,
+XStandardColormap **\fIstd_colormap_return\fP, int *\fIcount_return\fP,
+Atom \fIproperty\fP\^);
+.SH ARGUMENTS
+.IP \fIdisplay\fP 1i
+Specifies the connection to the X server.
+.ds Cn colormaps
+.IP \fIcount\fP 1i
+Specifies the number of \*(Cn.
+.ds Cn colormaps
+.IP \fIcount_return\fP 1i
+Returns the number of \*(Cn.
+.IP \fIproperty\fP 1i
+Specifies the property name.
+.IP \fIstd_colormap\fP 1i
+Specifies the
+.ZN XStandardColormap
+structure to be used.
+.IP \fIstd_colormap_return\fP 1i
+Returns the
+.ZN XStandardColormap
+structure.
+.SH DESCRIPTION
+The
+.ZN XAllocStandardColormap
+function allocates and returns a pointer to a
+.ZN XStandardColormap
+structure.
+Note that all fields in the
+.ZN XStandardColormap
+structure are initially set to zero.
+If insufficient memory is available,
+.ZN XAllocStandardColormap
+returns NULL.
+To free the memory allocated to this structure,
+use
+.ZN XFree .
+.LP
+The
+.ZN XSetRGBColormaps
+function replaces the RGB colormap definition in the specified property
+on the named window.
+If the property does not already exist,
+.ZN XSetRGBColormaps
+sets the RGB colormap definition in the specified property
+on the named window.
+The property is stored with a type of RGB_COLOR_MAP and a format of 32.
+Note that it is the caller's responsibility to honor the ICCCM
+restriction that only RGB_DEFAULT_MAP contain more than one definition.
+.LP
+The
+.ZN XSetRGBColormaps
+function usually is only used by window or session managers.
+To create a standard colormap,
+follow this procedure:
+.IP 1. 5
+Open a new connection to the same server.
+.IP 2. 5
+Grab the server.
+.IP 3. 5
+See if the property is on the property list of the root window for the screen.
+.IP 4. 5
+If the desired property is not present:
+.RS
+.IP \(bu 5
+Create a colormap (unless you are using the default colormap of the screen).
+.IP \(bu 5
+Determine the color characteristics of the visual.
+.IP \(bu 5
+Allocate cells in the colormap (or create it with
+.ZN AllocAll ).
+.IP \(bu 5
+Call
+.ZN XStoreColors
+to store appropriate color values in the colormap.
+.IP \(bu 5
+Fill in the descriptive members in the
+.ZN XStandardColormap
+structure.
+.IP \(bu 5
+Attach the property to the root window.
+.IP \(bu 5
+Use
+.ZN XSetCloseDownMode
+to make the resource permanent.
+.RE
+.IP 5. 5
+Ungrab the server.
+.LP
+.ZN XSetRGBColormaps
+can generate
+.ZN BadAlloc ,
+.ZN BadAtom ,
+and
+.ZN BadWindow
+errors.
+.LP
+The
+.ZN XGetRGBColormaps
+function returns the RGB colormap definitions stored
+in the specified property on the named window.
+If the property exists, is of type RGB_COLOR_MAP, is of format 32,
+and is long enough to contain a colormap definition,
+.ZN XGetRGBColormaps
+allocates and fills in space for the returned colormaps
+and returns a nonzero status.
+If the visualid is not present,
+.ZN XGetRGBColormaps
+assumes the default visual for the screen on which the window is located;
+if the killid is not present,
+.ZN None
+is assumed, which indicates that the resources cannot be released.
+Otherwise,
+none of the fields are set, and
+.ZN XGetRGBColormaps
+returns a zero status.
+Note that it is the caller's responsibility to honor the ICCCM
+restriction that only RGB_DEFAULT_MAP contain more than one definition.
+.LP
+.ZN XGetRGBColormaps
+can generate
+.ZN BadAtom
+and
+.ZN BadWindow
+errors.
+.SH STRUCTURES
+The
+.ZN XStandardColormap
+structure contains:
+.LP
+/\&* Hints */
+.TS
+lw(.5i) lw(2i) lw(1i).
+T{
+\&#define
+T} T{
+.ZN ReleaseByFreeingColormap
+T} T{
+( (XID) 1L)
+T}
+.TE
+/\&* Values */
+.IN "XStandardColormap" "" "@DEF@"
+.Ds 0
+.TA .5i 2.5i
+.ta .5i 2.5i
+typedef struct {
+ Colormap colormap;
+ unsigned long red_max;
+ unsigned long red_mult;
+ unsigned long green_max;
+ unsigned long green_mult;
+ unsigned long blue_max;
+ unsigned long blue_mult;
+ unsigned long base_pixel;
+ VisualID visualid;
+ XID killid;
+} XStandardColormap;
+.De
+.LP
+The colormap member is the colormap created by the
+.ZN XCreateColormap
+function.
+The red_max, green_max, and blue_max members give the maximum
+red, green, and blue values, respectively.
+Each color coefficient ranges from zero to its max, inclusive.
+For example,
+a common colormap allocation is 3/3/2 (3 planes for red, 3
+planes for green, and 2 planes for blue).
+This colormap would have red_max = 7, green_max = 7,
+and blue_max = 3.
+An alternate allocation that uses only 216 colors is red_max = 5,
+green_max = 5, and blue_max = 5.
+.LP
+The red_mult, green_mult, and blue_mult members give the
+scale factors used to compose a full pixel value.
+(See the discussion of the base_pixel members for further information.)
+For a 3/3/2 allocation, red_mult might be 32,
+green_mult might be 4, and blue_mult might be 1.
+For a 6-colors-each allocation, red_mult might be 36,
+green_mult might be 6, and blue_mult might be 1.
+.LP
+The base_pixel member gives the base pixel value used to
+compose a full pixel value.
+Usually, the base_pixel is obtained from a call to the
+.ZN XAllocColorPlanes
+function.
+Given integer red, green, and blue coefficients in their appropriate
+ranges, one then can compute a corresponding pixel value by
+using the following expression:
+.LP
+.Ds
+.TA .5i 1.5i
+.ta .5i 1.5i
+(r * red_mult + g * green_mult + b * blue_mult + base_pixel) & 0xFFFFFFFF
+.De
+.LP
+For
+.ZN GrayScale
+colormaps,
+only the colormap, red_max, red_mult,
+and base_pixel members are defined.
+The other members are ignored.
+To compute a
+.ZN GrayScale
+pixel value, use the following expression:
+.LP
+.Ds
+.TA .5i 1.5i
+.ta .5i 1.5i
+(gray * red_mult + base_pixel) & 0xFFFFFFFF
+.De
+.LP
+Negative multipliers can be represented by converting the 2's
+complement representation of the multiplier into an unsigned long and
+storing the result in the appropriate _mult field.
+The step of masking by 0xFFFFFFFF effectively converts the resulting
+positive multiplier into a negative one.
+The masking step will take place automatically on many machine architectures,
+depending on the size of the integer type used to do the computation,
+.LP
+The visualid member gives the ID number of the visual from which the
+colormap was created.
+The killid member gives a resource ID that indicates whether
+the cells held by this standard colormap are to be released
+by freeing the colormap ID or by calling the
+.ZN XKillClient
+function on the indicated resource.
+(Note that this method is necessary for allocating out of an existing colormap.)
+.LP
+The properties containing the
+.ZN XStandardColormap
+information have
+the type RGB_COLOR_MAP.
+.SH DIAGNOSTICS
+.TP 1i
+.ZN BadAlloc
+The server failed to allocate the requested resource or server memory.
+.TP 1i
+.ZN BadAtom
+A value for an Atom argument does not name a defined Atom.
+.TP 1i
+.ZN BadWindow
+A value for a Window argument does not name a defined Window.
+.SH "SEE ALSO"
+XAllocColor(__libmansuffix__),
+XCreateColormap(__libmansuffix__),
+XFree(__libmansuffix__),
+XSetCloseDownMode(__libmansuffix__)
+.br
+\fI\*(xL\fP
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