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Re: about contibuting to octave

From: Ben Abbott
Subject: Re: about contibuting to octave
Date: Tue, 03 Mar 2009 21:00:16 -0500

On Mar 3, 2009, at 2:52 PM, Michael Goffioul wrote:

On Tue, Mar 3, 2009 at 6:51 PM, Shai Ayal <address@hidden> wrote:
I think this is a good idea -- this will decouple the text object from
the backend.

We will need to know what fonts gnuplot uses to get freetype to get us
gnuplot's font metrics?
I think we can get the standard postscript font metrics from similar
type1 fonts which freetype can use (I distributed a set of ps-similar
fonts with octplot)

I guess gnuplot backend would use the back-up implementation.
Or we could still use freetype, hoping that gnuplot will use the same


Gnuplot uses the GD library.



After reading some hits via Google, it appears that this library can calculate the bounding rectangle text without rendering it, and that gdlib handles freetype, PS type 1 fonts, and truetype.


        imageftbbox — Give the bounding box of a text using fonts via freetype2

imagepsbbox — Give the bounding box of a text rectangle using PostScript Type1 fonts

        imagettfbbox — Give the bounding box of a text using TrueType fonts


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