Re: [Tuxpaint-devel] Use cases: send a picture to Grandma; use as desktop background

[<tor...@at...>]

Ben Armstrong wrote:
>> I don't know if there is a way round this, I'm struggling to think of a
>> way in which this behaviour is useful :-)
>>     
>
> Me too.  Does Vista have the same mis-feature, I wonder?
>
> We've been talking about metadata without mentioning specifics.  All we
> really mean is the association between a picture and the starter that
> was used to create it, so that when the picture is edited again, the
> code that handles the starter 'layer' still works, right?  Isn't there
> some other way of keeping track of that?  Steganography perhaps?  (OK,
> this would break if someone edited the image with another editor and
> altered the bits used to encode the metadata in a way that broke them,
> but so what?)  As for the thumbnails, they could be named with the
> md5sum hash of the file, allowing for a file to be renamed without
> forcing regeneration of the associated thumbnail.
>
>   
How about storing the metadata as textual data in the png-file?
http://www.libpng.org/pub/png/spec/iso/index-object.html#table41
Is the Textual data used for anything else?

Kind regards,
Tore