GD2-File-Format Documentation

[email protected] (Dieter Guthmann)
Newsgroups php.gd.devel
Message-ID <[email protected]>
Hello there,

is there a documentation of the GD2 file-format? Is the GD2 file-format 
stable or changing with every release of libgd?
The documentation at <http://www.libgd.org/%22OldGdFileFormats%22> is 
veeeery small *ggg*.
Originally I thought that libgd can write all the file-formats which it 
can read, but I was wrong :-(.
There is only read-support for XPM which I considered first, but 
XPM-writing is not possible... I need a fileformat with low 
compression-overhead (slow machine) but with acceptable file-size (at 
least <7MB better <5MB for a ~7Mpixel-File in color)... so I'm currently 
thinking about a GD2-support in my application...
Which compression is used in gd2?
Thanks in advance.

Best Regards,
Dieter Guthmann
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