Re: TPad based legend shown on screen and eps, not png/gif.

From: Brett Viren <>
Date: Thu, 19 May 2005 15:32:11 -0400

Hi Valeriy,

Valeriy Onuchin <> writes:

> Hi Brett,
> strange ... no idea yet why it's happend. Be fixed asap.
> However the following solution can help:
> TImageDump *di = new TImageDump("test.png");
> c1->Paint();
> di->Close();
> You can do it even in batch mode.

I do indeed need this in batch mode! But, there are a coupld of new problems when using TImageDump:

Some of the lines don't show up in the TImageDump's output. Eg, the test_legend.C output lacks the top and right borders. In my full plot the grid fails to show up at all as do one of the TGraphs I'm drawing with the "B" option. In both cases the EPS is correct.

The TImageDump takes a long time (on order a minute on Opteron 2.2 GHz) to dump the plot. It's true my plot does have many elements (one TGraph bar and marker for each NuMI spill to date) but EPS generation is just a couple seconds and the initial TCanvas rendering is even faster. I connected GDB to the process and it was spinning in TASImage::FillRectangleInternal, which makes sense given the many bars in the TGraph.

Running in batch or graphical mode doesn't changes either of these issues.

-Brett. Received on Thu May 19 2005 - 21:32:26 MEST

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