Pinboard Backdrops
by John R. Dawson

RISC OS 3 ONLY

This application is designed to be used with the Pinboard application supplied
as standard with RISC OS 3. Running Backdrops opens a single window displaying
46 sprites representing backdrop patterns. Clicking Select on the chosen
sprite creates a backdrop from that pattern by tiling it across the whole
screen, and establishes that pattern as the current backdrop. In its present
version the application presents eighteen "tiles" of up to 20 pixels wide by
10 high, twenty four of up to 32 by 16, and four of up to 108 by 54.

As presented, Backdrops has been configured for mode 12 sprites - the WimpSlot
and the DIMensions of user sprite areas will need modifying if, say, mode 20
sprites are to be developed.  However, this is not recommended since, although
mode 12 sprites look equally good in mode 20, the converse is often untrue
particularly with some extended colour fills.

It would be a fairly simple matter to replace any of the pattern sprites
(which are contained within the file Patterns), with your own designs.

Important note: the Pinboard module must not be unplugged if you wish to use
the Backdrops application. If it is, you are likely to get a "File 'Backdrop'
not found" error when you try to install a backdrop.

 RISC User 1993
