PNG stuff

[Frank Warmerdam]

On Thu, 9 Dec 2004 23:32:47 -0600, Blammo <bob.basques at ci.stpaul.mn.us> wrote:
> All,
>
> ok, this is going to sound like a wierd request, but here goes.
>
> Is there or has it been thought about, the addition of adding in "Text
> Strings" to the PNG output, things like IMGEXT, LAYERS, etc.  Something
> that could be retrievable programetrically (PERL) ?
>
> bobb

Bob,

Generally speaking this would be hard to do using the GD PNG output
since it does not give much low level access to libpng for writing specialized
chunks (as far as I know).   Potentially I could extend the GDAL PNG output
to allow adding chunks from "creation options" if that was desired, but it
would be a bit clumsy.

Best regards,
--
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I set the clouds in motion - turn up   | Frank Warmerdam, warmerdam at pobox.com
light and sound - activate the windows | http://pobox.com/~warmerdam
and watch the world go round - Rush    | Geospatial Programmer for Rent