Re: CVS version: Black background default for PNG

[Ethan M. <merritt@u.washington.edu>]

On Sunday 06 September 2009, Philipp K. Janert wrote:
> 
> The current CVS version seems to make black the 
> default background color for the PNG terminal. This
> seems to be new behavior

I don't see any such behaviour here.
Please clarify whether this is the libgd png terminal, or the cairo png
terminal.  In either case please also tell us the specific version of
libgd or cairo that gnuplot is linked against.

Also please tell us the precise options of your command
 "set term png ...."


The only related thing that comes to mind is that if you create
a transparent png image, the nominal background (which you don't
actually see because it's transparent :-) is black.  
That is necessary in order to get smooth alpha-blending.

	Ethan

> This seems to occur only for PNG, but not for the GIF
> or JPG terminals
> 
> I am not sure when this first occurred - the current 
> CVS version behaves the way as just described, but
> the did not do so a few months ago.
> 
> I think it would be desirable to have white again be the
> background for the PNG terminal (consistent with the
> other terminals).
> 
> Best,
> 
> 		Ph.
> 
> 
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