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RedHat 9 (Linux i386) - man page for bitmap (redhat section n)

bitmap(n)			       Tk Built-In Commands				bitmap(n)

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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  pix-
       els  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  bit-
	      map, 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 bit-
	      map 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  speci-
	      fied,  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  speci-
	      fied 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

Tk					       4.0					bitmap(n)


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