He VAliey
Can you make a tine correction for
$ROOTSYS/tutotrials/pad2png.C
Please add an operator
c->Update()
just before
gSystem->ProcessEvents();
So entire macro to be as follows:
(hires07) [151] more pad2png.C
void pad2png()
{
// Create a canvas and save as png.
TCanvas *c = new TCanvas;
TH1F *h = new TH1F("gaus", "gaus", 100, -5, 5);
h->FillRandom("gaus", 10000);
h->Draw();
c->Update();
gSystem->ProcessEvents();
TImage *img = TImage::Create();
//img->FromPad(c, 10, 10, 300, 200);
img->FromPad(c);
img->WriteImage("canvas.png");
delete h;
delete c;
delete img;
}
To help the multithreaded version of ROOT with Qt layer under Windows.
It causes no harm.
Thank you in advance,
----
Best regards
Valeri
> -----Original Message-----
> From: owner-roottalk@pcroot.cern.ch
[mailto:owner-roottalk@pcroot.cern.ch] On
> Behalf Of Valeriy Onuchin
> Sent: Thursday, April 08, 2004 3:58 PM
> To: Andy Buckley; roottalk@cern.ch
> Subject: Re: [ROOT] PNG output?
>
> Hi Andy,
> ROOT supports "PNG bitmap".
> Please, check $ROOTSYS/tutotrials/pad2png.C
>
> Regards. Valeriy
>
> win32gdk PNG is "almost ready" :-)
>
> >
> > Hi again,
> >
> > Is there any possibility that PNG bitmap output can be supplied in
ROOT
> > in addition to GIF format? This would be very nice, since GIF has a
> > certain stigma due to the LZW compression patent (even thought I
believe
> > it's now expired) and since PNG is simply a nicer, more modern
format.
> > Apologies if it's already supported --- I couldn't find any mention
of
> > it in the 4.00/03 release notes.
> >
> > Also, is there a way (e.g. a .rootrc directive) to specify the
preferred
> > output format from the canvas menu rather than have to drag the
> > drop-down list to the right position each time? This would also be
nice,
> > but is rather less important!
> >
> > Andy
> >
> > --
> > Andy Buckley, HEP Group, Cavendish Lab, Cambridge
> > http://www.insectnation.org
> >
> >
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