Re: gd.trm and multiple plots with png

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

update:

multi-image GIFs are supported and working in libgd as of
version 2.0.32  (Nov 2004).

So we could use this mechanism if we really wanted to.
The first problem I see is that you have to initialize
the GIF file differently if you want to insert multiple
images, so you have to know in advance that you are 
going to do so.   In other words, it won't work to 
have term->graphics() simply check whether the file is
already open.  It would have to be a new option 
	set term gif {animated}

The gif term for multi-image is "animated", although
this may not be the best keyword to use in gnuplot.
"multiplot" would be better, but it already is being
used for something else.

Does anyone think this would be worth the effort?
 




On Saturday 15 January 2005 01:12 pm, Ethan Merritt wrote:
> On Thursday 13 January 2005 05:02 pm, Hans-Bernhard Broeker wrote:
> >
> > It may not even be strictly necessary --- at least not for GIF files
> > generated by gd.trm.  GIF files can, at least in principle, hold
> > multiple pages.  But I suspect the GD library doesn't support this
> > (admittedly rarely used) feature, so gd.trm can't do anything about
> > that.
> 
> Tom Boutell says it is scheduled for an upcoming version of libgd.
> And, as I mentioned already, png could be supported this way also.
> But I don't know of any specific plans to add multi-image png
> support to libgd.


-- 
Ethan A Merritt       merritt@u.washington.edu
Biomolecular Structure Center
Mailstop 357742
University of Washington, Seattle, WA 98195