Amazing Splash Screen Effect...

Chipp Walters chipp at chipp.com
Mon Aug 4 15:59:00 EDT 2003


Alex,

forgot to answer one of your questions...see below.


> What do you mean anti-aliased? Does Quicktime do some blending with
> it's dissolve effect?

Here's how it works. It doesn't use the windowshape property -- just a
regular window with decorations set to empty. When launched, it takes a
small screen capture of the region behind the window, then displays the
window (with no decorations and the screen capture now visible), then shows
the PNG graphic (with alpha channel) using a visual effect dissolve.

Because PNG's have an 8 bit alpha channel, it's easy to provide a full
'anti-aliased' graphic on top of the desktop image captured...thus
transparencies and soft shadows can be made.

best,

Chipp




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