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000003_icon-group-sender _Thu Sep 26 01:56:43 1996.msg
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Received: by cheltenham.cs.arizona.edu; Fri, 27 Sep 1996 12:39:19 MST
Date: 26 Sep 96 09:55:36 BST
From: R J Hare <rjhare@tattoo.ed.ac.uk>
Subject: Copying of irregular images
To: icon-group@cs.arizona.edu
Reply-To: rjhare@ed.ac.uk
Organisation: Edinburgh University Computing Services
Message-Id: <9609260955.aa11962@uk.ac.ed.tattoo>
Errors-To: icon-group-errors@cs.arizona.edu
I want to copy what is (effectively) an irregular shaped image onto an
existing window. CopyArea only allows me to copy rectangular areas, so a
rectangular area which included the irregular image would, if copied also
overwrite parts of the existing window.
Is there any way round this?
Is there a "transparent" colour so that I can set the background this way
before generating my irregular image, so that when copied onto the window, the
"transparent" pixels in the image do not affect the corresonding pixels in the
window? I cannot find any mention of this in the WWW pages.
Should there be such a "transparent" colour or is the whole idea rubbish?
Thanks.
Roger Hare