The current plmeta format puts the string "PLPLOT" at the beginning and a
version string, currently "2005a" or "2005b" depending if it is a file or a
server.
I propose making a new version, say "2015-1", and keep the "PLPLOT" as the
identifying string. I would like to keep using strings in the header.
On Feb 16, 2015, at 3:32 AM, Phil Rosenberg <p.d.rosenb...@gmail.com> wrote:
> Hi Jim
> You should probably just ignore the old plmeta format to a large extent as I
> think it will be totally unused at present.
>
> I would suggest starting the file with four characters (google fcc) which
> identify the file as a plmeta file, eg PLPL or PLME or something. Then follow
> with a fixed size unsigned integer, e.g uint16, which specifies the format
> version. In this way plplot can check the version and if it is too high it
> can refuse to read it. Then you are free to make whatever changes you need
> and simply increment the version number written.
>
> Phil
> From: Jim Dishaw
> Sent: 16/02/2015 04:07
> To: plplot-devel@lists.sourceforge.net list
> Subject: [Plplot-devel] plmetafile compatibility
>
> I need to create a new metafile version because there are commands (CHANGE
> STATE CHR and CHANGE STATE SYM) that are not supported by the current version
> (2005) metafile. Also, the current version does not save the color alpha
> channels. What other shortcomings need to fixed?
>
> I will maintain backwards compatibility in plrender for the 2005 version,
> however, the plmeta output device will generate the new version.
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