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From: rxb@ASC.SLB.COM (Rafael Bracho)
Newsgroups: comp.windows.news
Subject: Re: Canvas sizes
Message-ID: <8911071702.AA03715.rxb@plutonium.ASC.SLB.COM>
Date: 7 Nov 89 23:02:25 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 23

Regarding Russell Leighton's request:

>In xnews, `readcanvas' scales the images to the unit square.
>Given this how do I find out what the actual size of
>the canvas is? I cannot use `getcanvasshape pathbbox'
>because it will return 0 0 1 1.

Do the following (assume can is the result of readcanvas):

	gsave
	can setcanvas
	1 1 dtransform
	abs exch abs
	grestore

The result will be the width and height of the canvas.  Note that I used the
undocumented (at least in the pre-FCS documentation) function 'abs' in
both numbers although only the height will be negative.  This is because
I don't know if NeWS 3.0 will have its internal origin in the upper
right hand corner, due to some X.12 requirements. {:-)

					Rafael Bracho
					rxb@asc.slb.com