Re: PNG resolution [Was: Is there a way to prin in multiple pages?]

[Lars Clausen <lrclause cs uiuc edu>]

On 29 Jan 2003, Lars Clausen wrote:
> On Wed, 29 Jan 2003, ed hunter wrote:
> > On Tue, Jan 28, 2003 at 08:35:15AM -0600, Lars Clausen wrote:
> > > On Tue, 28 Jan 2003, Leonardo Javier Belén wrote:
> > > > In the mean time, a thing that really drives me crazy is the fact
> > > > that, when I need to print know the diagram in specially big paper
> > > > (using a sort of plotter) I, according with the printer's, need to
> > > > give them a raster image, so I try to give them .pngs, in which the
> > > > resolution is 96x96, which is clearly unsufficient, so how can I
> > > > change that value?.
> > >
> > > In 0.90, you are asked for the size of the PNG when you export.  Just
> > > set this up to however much you need.
> >
> > I think he means *resolution*. The printers need to know it (or at least
> > are accustomed to think in these terms, which is the same :-)
>
> Oh, I see.  I guess when the size is changed, the resolution ought to
> change correspondingly.  The 96x96 resolution is actually just an
> arbitrary libpng default that has nothing to do with what we write.  We
> do 20 DPCM, i.e. 50 DPI, by default.  We should change the resolution
> setting to fit the scaling.  Please file us a bug report so we don't
> forget.

Looked into it, and it was real easy to fix.  Won't change the dialog to
allow resolution setting rather than pixel setting just now.  The default
is indeed 50 DPI.

-Lars

-- 
Lars Clausen (http://shasta.cs.uiuc.edu/~lrclause)| Hårdgrim of Numenor
"I do not agree with a word that you say, but I   |----------------------------
will defend to the death your right to say it."   | Where are we going, and
    --Evelyn Beatrice Hall paraphrasing Voltaire  | what's with the handbasket?