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From: jcm@nori.Philips.Com (John Martin)
Newsgroups: comp.windows.news
Subject: width and height of canvases?
Message-ID: <44718@philabs.Philips.Com>
Date: 15 Feb 89 14:10:11 GMT
Sender: news@philabs.Philips.Com
Lines: 25

I would like to find out the width and height of an SRF image that has been
read with readcanvas. Does anyone know how to do this?

For example, after the line:

	(/c3/jcm/images/car.im8) readcanvas

the new canvas is on the stack, and I would like to know what aspect ratio
to use in displaying it before I pass it to imagecanvas.

There are some properties of canvases that can be inquired about, but
in keeping with the device indepedence of NeWS, width and height don't
seem to be accessible. The information is certainly there, because:

	(/c3/jcm/images/car.im8) readcanvas 
	pstack 

will show the canvas name, including its width and height in
parentheses.

Thanks very much.

	John Martin
	Philips Labs
	jcm@philabs.philips.com