/usr/gnu/man/cat.n/image.n.Z(/usr/gnu/man/cat.n/image.n.Z)

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NAME

       image - Create and manipulate images

SYNOPSIS

       image option ?arg arg ...?
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DESCRIPTION

       The  image command is used to create, delete, and query images.  It can
       take several different forms, depending on the  option  argument.   The
       legal forms are:

       image create type ?name? ?option value ...?
              Creates a new image and a command with the same name and returns
              its name.  type specifies the type of the image, which  must  be
              one  of the types currently defined (e.g., bitmap).  name speci-
              fies the name for the image;  if it is omitted then Tk  picks  a
              name  of  the  form imagex, where x is an integer.  There may be
              any number of option-value 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.,  ::img::logo,
              ::img::large).

       image delete ?name name ...?
              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 image create, the exist-
              ing instances will use the new image.

       image height name
              Returns a decimal string giving the height of image name in pix-
              els.

       image inuse name
              Returns a boolean value indicating  whether  or  not  the  image
              given by name is in use by any widgets.

       image names
              Returns a list containing the names of all existing images.

       image type name
              Returns  the  type of image name (the value of the type argument
              to image create when the image was created).

       image types
              Returns a list whose elements are all of the valid  image  types
              (i.e., all of the values that may be supplied for the type argu-
              ment to image create).

       image width name
              Returns a decimal string giving the width of image name in  pix-
              els.

       Additional  operations (e.g. writing the image to a file) may be avail-
       able as subcommands of the image instance command. See the manual  page
       for the particular image type for details.

BUILT-IN IMAGE TYPES

       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.

       bitmap Each  pixel  in  the  image displays a foreground color, a back-
              ground color, or nothing.  See the bitmap manual entry for  more
              information.

       photo  Displays  a  variety  of  full-color  images, using dithering to
              approximate colors on displays with limited color  capabilities.
              See the photo manual entry for more information.

SEE ALSO

       bitmap(n), options(n), photo(n)

KEYWORDS

       height, image, types of images, width

Tk                                    4.0                             image(n)