NAME

       bitmap - Images that display two colors

SYNOPSIS

       image create bitmap ?name? ?options?
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DESCRIPTION

       A  bitmap  is an image whose pixels can display either of two colors or be transparent.  A
       bitmap image is defined by four things:  a background color, a foreground color,  and  two
       bitmaps,  called  the source and the mask.  Each of the bitmaps specifies 0/1 values for a
       rectangular array of pixels, and the two bitmaps  must  have  the  same  dimensions.   For
       pixels where the mask is zero, the image displays nothing, producing a transparent effect.
       For other pixels, the image displays the foreground color if the source data  is  one  and
       the background color if the source data is zero.

CREATING BITMAPS

       Like  all images, bitmaps are created using the image create command.  Bitmaps support the
       following options:

       -background color
              Specifies a background color for the image in any of the standard ways accepted  by
              Tk.   If  this  option is set to an empty string then the background pixels will be
              transparent.  This effect is achieved by  using  the  source  bitmap  as  the  mask
              bitmap, ignoring any -maskdata or -maskfile options.

       -data string
              Specifies the contents of the source bitmap as a string.  The string must adhere to
              X11 bitmap format (e.g., as generated by the bitmap program).  If  both  the  -data
              and -file options are specified, the -data option takes precedence.

       -file name
              name  gives  the  name of a file whose contents define the source bitmap.  The file
              must adhere to X11 bitmap format (e.g., as generated by the bitmap program).

       -foreground color
              Specifies a foreground color for the image in any of the standard ways accepted  by
              Tk.

       -maskdata string
              Specifies  the  contents  of  the  mask as a string.  The string must adhere to X11
              bitmap format (e.g., as generated by the bitmap program).  If  both  the  -maskdata
              and -maskfile options are specified, the -maskdata option takes precedence.

       -maskfile name
              name gives the name of a file whose contents define the mask.  The file must adhere
              to X11 bitmap format (e.g., as generated by the bitmap program).

IMAGE COMMAND

       When a bitmap image is created, Tk also creates a new command whose name is  the  same  as
       the  image.   This  command may be used to invoke various operations on the image.  It has
       the following general form:
              imageName option ?arg arg ...?
       Option and the args determine the exact behavior of the command.  The  following  commands
       are possible for bitmap images:

       imageName cget option
              Returns  the current value of the configuration option given by option.  Option may
              have any of the values accepted by the image create bitmap command.

       imageName configure ?option? ?value option value ...?
              Query or modify  the  configuration  options  for  the  image.   If  no  option  is
              specified,  returns  a  list  describing all of the available options for imageName
              (see Tk_ConfigureInfo for information on the format of this list).   If  option  is
              specified  with  no value, then the command returns a list describing the one named
              option (this list will be identical to  the  corresponding  sublist  of  the  value
              returned  if  no  option  is  specified).   If  one  or more option-value pairs are
              specified, then the  command  modifies  the  given  option(s)  to  have  the  given
              value(s);   in  this case the command returns an empty string.  Option may have any
              of the values accepted by the image create bitmap command.

KEYWORDS

       bitmap, image