Fading Bitmaps

["Hibbs, Philip" <philip.hibbs@tnt.co.uk>]

This is a little Borland C++ Builder app that we have written to fade a
256 colour bitmap in or out. It only works with 256 colour bitmaps in a
256 colour screen mode, but we can live with that. Also, the bitmap must
not contain any Windows system palette colours, which the Handshak.BMP
file does, but we can fix that with a decent paint package such as Paint
Shop Pro.

The app is set up to read Handshak.BMP and Shipping.BMP from the current
directory, these can be copied in or the paths can be pointed to the
installed directory.

The problem that we are having is that the bitmap flickers at the start
and finish of the fade operation. We have tried various solutions, but
nothing seems to get rid of it! If anyone could help us with this
problem, or suggest any other or better ways of achieving this effect,
it would be very much appreciated.

We are proud of having achieved so much with so little code, which is a
testament to the versatility of Borland C++ Builder more than anything,
and hope that this may be of interest or use to others.

 

Philip Hibbs
Senior Analyst
TNT United Kingdom
TNT Express House
Atherstone
UNITED KINGDOM
philip.hibbs@tnt.co.uk
http://tnt.co.uk

fade.zip