T>
<DT> 
<DD> 
exchanges x and y coordinates.
</DD>
</DL>
<BR>
<BR>

<A NAME="39329"></A>
<B>:map-picture</B> <EM>lut &amp;optional (result (send self :duplicate)) </EM>[method]

<DL COMPACT>
<DT> 
<DD> 
This pixel-image is translated by the <EM>lut</EM> and stored in <EM>result</EM>.

</DD>
</DL>
<BR>
<BR>

<A NAME="39341"></A>
<B>:map</B> <EM>fn &amp;optional (result (send self :duplicate)) </EM>[method]

<DL COMPACT>
<DT> 
<DD> 
applies function <EM>fn</EM> to all the pixels in the image,
and put the res