🚀 go-pugleaf

I am confused on how to use bitmaps.

I am familiar with intuition's way of using windows, with default
bitmaps created ready to draw into, but now I need to get access
to the default bitmap pointers so I can save and manipulate the
window.

Questions:

how do I convert planeptrs to window's bitmap to common x,y 
coordinates?

how do I get the correct offsets to the window's bitmaps?

This may all seem easy, but I have read and read the manuals until
the guru finally wins...

Please post the code to do the following:

read a x,y pixel on all bitplanes of a window (not the readpixel way)
write a x,y pixel "      "
get the offsets
etc....

Thanks...

Hans Bechtel
Trust the guru.  The guru is your friend.