'\"
'\" Copyright (c) 1994 The Regents of the University of California.
'\" Copyright (c) 1994-1996 Sun Microsystems, Inc.
'\"
'\" See the file "license.terms" for information on usage and redistribution
'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
'\" 
'\" RCS: @(#) $Id: image.n,v 1.1.1.1 2007/07/10 15:05:16 duncan Exp $
'\" 
'\" The definitions below are for supplemental macros used in Tcl/Tk
'\" manual entries.
'\"
'\" .AP type name in/out ?indent?
'\"	Start paragraph describing an argument to a library procedure.
'\"	type is type of argument (int, etc.), in/out is either "in", "out",
'\"	or "in/out" to describe whether procedure reads or modifies arg,
'\"	and indent is equivalent to second arg of .IP (shouldn't ever be
'\"	needed;  use .AS below instead)
'\"
'\" .AS ?type? ?name?
'\"	Give maximum sizes of arguments for setting tab stops.  Type and
'\"	name are examples of largest possible arguments that will be passed
'\"	to .AP later.  If args are omitted, default tab stops are used.
'\"
'\" .BS
'\"	Start box enclosure.  From here until next .BE, everything will be
'\"	enclosed in one large box.
'\"
'\" .BE
'\"	End of box enclosure.
'\"
'\" .CS
'\"	Begin code excerpt.
'\"
'\" .CE
'\"	End code excerpt.
'\"
'\" .VS ?version? ?br?
'\"	Begin vertical sidebar, for use in marking newly-changed parts
'\"	of man pages.  The first argument is ignored and used for recording
'\"	the version when the .VS was added, so that the sidebars can be
'\"	found and removed when they reach a certain age.  If another argument
'\"	is present, then a line break is forced before starting the sidebar.
'\"
'\" .VE
'\"	End of vertical sidebar.
'\"
'\" .DS
'\"	Begin an indented unfilled display.
'\"
'\" .DE
'\"	End of indented unfilled display.
'\"
'\" .SO
'\"	Start of list of standard options for a Tk widget.  The
'\"	options follow on successive lines, in four columns separated
'\"	by tabs.
'\"
'\" .SE
'\"	End of list of standard options for a Tk widget.
'\"
'\" .OP cmdName dbName dbClass
'\"	Start of description of a specific option.  cmdName gives the
'\"	option's name as specified in the class command, dbName gives
'\"	the option's name in the option database, and dbClass gives
'\"	the option's class in the option database.
'\"
'\" .UL arg1 arg2
'\"	Print arg1 underlined, then print arg2 normally.
'\"
'\" RCS: @(#) $Id: man.macros,v 1.1.1.1 2007/07/10 15:05:16 duncan Exp $
'\"
'\"	# Set up traps and other miscellaneous stuff for Tcl/Tk man pages.
.if t .wh -1.3i ^B
.nr ^l \n(.l
.ad b
'\"	# Start an argument description
.de AP
.ie !"\\$4"" .TP \\$4
.el \{\
.   ie !"\\$2"" .TP \\n()Cu
.   el          .TP 15
.\}
.ta \\n()Au \\n()Bu
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\&\\$1	\\fI\\$2\\fP	(\\$3)
.\".b
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.br
.ie !"\\$2"" \{\
\&\\$1	\\fI\\$2\\fP
.\}
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\&\\fI\\$1\\fP
.\}
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..
'\"	# define tabbing values for .AP
.de AS
.nr )A 10n
.if !"\\$1"" .nr )A \\w'\\$1'u+3n
.nr )B \\n()Au+15n
.\"
.if !"\\$2"" .nr )B \\w'\\$2'u+\\n()Au+3n
.nr )C \\n()Bu+\\w'(in/out)'u+2n
..
.AS Tcl_Interp Tcl_CreateInterp in/out
'\"	# BS - start boxed text
'\"	# ^y = starting y location
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.if n .nf
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.if n \l'\\n(.lu\(ul'
.if n .fi
..
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.nf
.ti 0
.mk ^t
.ie n \l'\\n(^lu\(ul'
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.\"	Draw four-sided box normally, but don't draw top of
.\"	box if the box started on an earlier page.
.ie !\\n(^b-1 \{\
\h'-1.5n'\L'|\\n(^yu-1v'\l'\\n(^lu+3n\(ul'\L'\\n(^tu+1v-\\n(^yu'\l'|0u-1.5n\(ul'
.\}
.el \}\
\h'-1.5n'\L'|\\n(^yu-1v'\h'\\n(^lu+3n'\L'\\n(^tu+1v-\\n(^yu'\l'|0u-1.5n\(ul'
.\}
.\}
.fi
.br
.nr ^b 0
..
'\"	# VS - start vertical sidebar
'\"	# ^Y = starting y location
'\"	# ^v = 1 (for troff;  for nroff this doesn't matter)
.de VS
.if !"\\$2"" .br
.mk ^Y
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.el .nr ^v 1u
..
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.ev 2
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.ev
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.nr ^v 0
..
'\"	# Special macro to handle page bottom:  finish off current
'\"	# box/sidebar if in box/sidebar mode, then invoked standard
'\"	# page bottom macro.
.de ^B
.ev 2
'ti 0
'nf
.mk ^t
.if \\n(^b \{\
.\"	Draw three-sided box if this is the box's first page,
.\"	draw two sides but no top otherwise.
.ie !\\n(^b-1 \h'-1.5n'\L'|\\n(^yu-1v'\l'\\n(^lu+3n\(ul'\L'\\n(^tu+1v-\\n(^yu'\h'|0u'\c
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.\}
.if \\n(^v \{\
.nr ^x \\n(^tu+1v-\\n(^Yu
\kx\h'-\\nxu'\h'|\\n(^lu+3n'\ky\L'-\\n(^xu'\v'\\n(^xu'\h'|0u'\c
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..
'\"	# DS - begin display
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.RS
.nf
.sp
..
'\"	# DE - end display
.de DE
.fi
.RE
.sp
..
'\"	# SO - start of list of standard options
.de SO
.SH "STANDARD OPTIONS"
.LP
.nf
.ta 5.5c 11c
.ft B
..
'\"	# SE - end of list of standard options
.de SE
.fi
.ft R
.LP
See the \\fBoptions\\fR manual entry for details on the standard options.
..
'\"	# OP - start of full description for a single option
.de OP
.LP
.nf
.ta 4c
Command-Line Name:	\\fB\\$1\\fR
Database Name:	\\fB\\$2\\fR
Database Class:	\\fB\\$3\\fR
.fi
.IP
..
'\"	# CS - begin code excerpt
.de CS
.RS
.nf
.ta .25i .5i .75i 1i
..
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..
.de UL
\\$1\l'|0\(ul'\\$2
..
.TH image n 4.0 Tk "Tk Built-In Commands"
.BS
'\" Note:  do not modify the .SH NAME line immediately below!
.SH NAME
image \- Create and manipulate images
.SH SYNOPSIS
\fBimage\fR \fIoption \fR?\fIarg arg ...\fR?
.BE

.SH DESCRIPTION
.PP
The \fBimage\fR command is used to create, delete, and query images.
It can take several different forms, depending on the
\fIoption\fR argument.  The legal forms are:
.TP
\fBimage create \fItype \fR?\fIname\fR? ?\fIoption value ...\fR?
Creates a new image and a command with the same name and returns its name.
\fItype\fR specifies the type of the image, which must be one of
the types currently defined (e.g., \fBbitmap\fR).
\fIname\fR specifies the name for the image;  if it is omitted then
Tk picks a name of the form \fBimage\fIx\fR, where \fIx\fR is
an integer.
There may be any number of \fIoption\fR\-\fIvalue\fR pairs,
which provide configuration options for the new image.
The legal set of options is defined separately for each image
type;  see below for details on the options for built-in image types.
If an image already exists by the given name then it is replaced
with the new image and any instances of that image will redisplay
with the new contents.
It is important to note that the image command will silently overwrite any
procedure that may currently be defined by the given name, so choose the
name wisely.  It is recommended to use a separate namespace for image names
(e.g., \fB::img::logo\fR, \fB::img::large\fR).
.TP
\fBimage delete \fR?\fIname name\fR ...?
Deletes each of the named images and returns an empty string.
If there are instances of the images displayed in widgets,
the images won't actually be deleted until all of the instances
are released.
However, the association between the instances and the image
manager will be dropped.
Existing instances will retain their sizes but redisplay as
empty areas.
If a deleted image is recreated with another call to \fBimage create\fR,
the existing instances will use the new image.
.TP
\fBimage height \fIname\fR
Returns a decimal string giving the height of image \fIname\fR
in pixels.
.TP
\fBimage inuse \fIname\fR
Returns a boolean value indicating whether or not the image given by
\fIname\fR is in use by any widgets.
.TP
\fBimage names\fR
Returns a list containing the names of all existing images.
.TP
\fBimage type \fIname\fR
Returns the type of image \fIname\fR (the value of the \fItype\fR
argument to \fBimage create\fR when the image was created).
.TP
\fBimage types\fR
Returns a list whose elements are all of the valid image types
(i.e., all of the values that may be supplied for the \fItype\fR
argument to \fBimage create\fR).
.TP
\fBimage width \fIname\fR
Returns a decimal string giving the width of image \fIname\fR
in pixels.
.PP
Additional operations (e.g. writing the image to a file) may be
available as subcommands of the image instance command. See the manual
page for the particular image type for details.
.SH "BUILT-IN IMAGE TYPES"
.PP
The following image types are defined by Tk so they will be available
in any Tk application.
Individual applications or extensions may define additional types.
.TP
\fBbitmap\fR
Each pixel in the image displays a foreground color, a background
color, or nothing.
See the \fBbitmap\fR manual entry for more information.
.TP
\fBphoto\fR
Displays a variety of full-color images, using dithering to
approximate colors on displays with limited color capabilities.
See the \fBphoto\fR manual entry for more information.

.SH "SEE ALSO"
bitmap(n), options(n), photo(n)

.SH KEYWORDS
height, image, types of images, width