123 lines
5.7 KiB
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123 lines
5.7 KiB
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<HTML><HEAD><TITLE>Tk Built-In Commands - bitmap manual page</TITLE></HEAD><BODY>
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<DL>
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<DD><A HREF="bitmap.htm#M2" NAME="L100">NAME</A>
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<DL><DD>bitmap - Images that display two colors</DL>
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<DD><A HREF="bitmap.htm#M3" NAME="L101">SYNOPSIS</A>
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<DL>
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<DD><B>image create bitmap </B>?<I>name</I>? ?<I>options</I>?
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</DL>
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<DD><A HREF="bitmap.htm#M4" NAME="L102">DESCRIPTION</A>
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<DD><A HREF="bitmap.htm#M5" NAME="L103">CREATING BITMAPS</A>
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<DL>
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<DD><A HREF="bitmap.htm#M6" NAME="L104"><B>-background </B><I>color</I></A>
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<DD><A HREF="bitmap.htm#M7" NAME="L105"><B>-data </B><I>string</I></A>
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<DD><A HREF="bitmap.htm#M8" NAME="L106"><B>-file </B><I>name</I></A>
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<DD><A HREF="bitmap.htm#M9" NAME="L107"><B>-foreground </B><I>color</I></A>
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<DD><A HREF="bitmap.htm#M10" NAME="L108"><B>-maskdata </B><I>string</I></A>
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<DD><A HREF="bitmap.htm#M11" NAME="L109"><B>-maskfile </B><I>name</I></A>
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</DL>
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<DD><A HREF="bitmap.htm#M12" NAME="L110">IMAGE COMMAND</A>
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<DL>
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<DD><A HREF="bitmap.htm#M13" NAME="L111"><I>imageName </I><B>cget</B> <I>option</I></A>
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<DD><A HREF="bitmap.htm#M14" NAME="L112"><I>imageName </I><B>configure</B> ?<I>option</I>? ?<I>value option value ...</I>?</A>
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</DL>
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<DD><A HREF="bitmap.htm#M15" NAME="L113">KEYWORDS</A>
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</DL><HR>
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<H3><A NAME="M2">NAME</A></H3>
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bitmap - Images that display two colors
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<H3><A NAME="M3">SYNOPSIS</A></H3>
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<B>image create bitmap </B>?<I>name</I>? ?<I>options</I>?<BR>
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<H3><A NAME="M4">DESCRIPTION</A></H3>
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A bitmap is an image whose pixels can display either of two colors
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or be transparent.
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A bitmap image is defined by four things: a background color,
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a foreground color, and two bitmaps, called the <I>source</I>
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and the <I>mask</I>.
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Each of the bitmaps specifies 0/1 values for a rectangular
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array of pixels, and the two bitmaps must have the same
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dimensions.
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For pixels where the mask is zero, the image displays nothing,
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producing a transparent effect.
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For other pixels, the image displays the foreground color if
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the source data is one and the background color if the source
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data is zero.
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<H3><A NAME="M5">CREATING BITMAPS</A></H3>
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Like all images, bitmaps are created using the <B><A HREF="../TclCmd/image.htm">image create</A></B>
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command.
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Bitmaps support the following <I>options</I>:
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<P>
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<DL>
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<P><DT><A NAME="M6"><B>-background </B><I>color</I></A><DD>
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Specifies a background color for the image in any of the standard
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ways accepted by Tk. If this option is set to an empty string
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then the background pixels will be transparent. This effect
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is achieved by using the source bitmap as the mask bitmap, ignoring
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any <B>-maskdata</B> or <B>-maskfile</B> options.
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<P><DT><A NAME="M7"><B>-data </B><I>string</I></A><DD>
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Specifies the contents of the source bitmap as a string.
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The string must adhere to X11 bitmap format (e.g., as generated
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by the <B>bitmap</B> program).
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If both the <B>-data</B> and <B>-file</B> options are specified,
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the <B>-data</B> option takes precedence.
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<P><DT><A NAME="M8"><B>-file </B><I>name</I></A><DD>
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<I>name</I> gives the name of a file whose contents define the
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source bitmap.
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The file must adhere to X11 bitmap format (e.g., as generated
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by the <B>bitmap</B> program).
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<P><DT><A NAME="M9"><B>-foreground </B><I>color</I></A><DD>
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Specifies a foreground color for the image in any of the standard
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ways accepted by Tk.
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<P><DT><A NAME="M10"><B>-maskdata </B><I>string</I></A><DD>
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Specifies the contents of the mask as a string.
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The string must adhere to X11 bitmap format (e.g., as generated
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by the <B>bitmap</B> program).
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If both the <B>-maskdata</B> and <B>-maskfile</B> options are specified,
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the <B>-maskdata</B> option takes precedence.
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<P><DT><A NAME="M11"><B>-maskfile </B><I>name</I></A><DD>
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<I>name</I> gives the name of a file whose contents define the
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mask.
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The file must adhere to X11 bitmap format (e.g., as generated
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by the <B>bitmap</B> program).
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<P></DL>
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<H3><A NAME="M12">IMAGE COMMAND</A></H3>
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When a bitmap image is created, Tk also creates a new command
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whose name is the same as the image.
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This command may be used to invoke various operations
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on the image.
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It has the following general form:
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<PRE><I>imageName option </I>?<I>arg arg ...</I>?</PRE>
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<I>Option</I> and the <I>arg</I>s
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determine the exact behavior of the command. The following
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commands are possible for bitmap images:
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<P>
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<DL>
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<P><DT><A NAME="M13"><I>imageName </I><B>cget</B> <I>option</I></A><DD>
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Returns the current value of the configuration option given
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by <I>option</I>.
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<I>Option</I> may have any of the values accepted by the
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<B>image create bitmap</B> command.
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<P><DT><A NAME="M14"><I>imageName </I><B>configure</B> ?<I>option</I>? ?<I>value option value ...</I>?</A><DD>
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Query or modify the configuration options for the image.
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If no <I>option</I> is specified, returns a list describing all of
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the available options for <I>imageName</I> (see <B><A HREF="../TclLib/ConfigWidg.htm">Tk_ConfigureInfo</A></B> for
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information on the format of this list). If <I>option</I> is specified
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with no <I>value</I>, then the command returns a list describing the
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one named option (this list will be identical to the corresponding
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sublist of the value returned if no <I>option</I> is specified). If
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one or more <I>option-value</I> pairs are specified, then the command
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modifies the given option(s) to have the given value(s); in
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this case the command returns an empty string.
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<I>Option</I> may have any of the values accepted by the
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<B>image create bitmap</B> command.
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<P></DL>
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<H3><A NAME="M15">KEYWORDS</A></H3>
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<A href="../Keywords/B.htm#bitmap">bitmap</A>, <A href="../Keywords/I.htm#image">image</A>
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<HR><PRE>
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<A HREF="../copyright.htm">Copyright</A> © 1994 The Regents of the University of California.
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<A HREF="../copyright.htm">Copyright</A> © 1994-1996 Sun Microsystems, Inc.
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<A HREF="../copyright.htm">Copyright</A> © 1995-1997 Roger E. Critchlow Jr.</PRE>
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</BODY></HTML>
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