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PNG graphics on Movable Type

My host doesn’t support the graphics library that Movable Type prefers for making thumbnail images. Six Apart shows you how to use NetPBM, which is supported.

I also discovered that the version I’m running doesn’t do PNG graphic handling. That’s easily fixed. In lib/MT/Image.pm, change the line:
my %Types = (jpg => 'jpeg', gif => 'gif');
to:
my %Types = (jpg => 'jpeg', gif => 'gif', png => 'png');

As a Perl guy, I’m mildly horrified with the way this code works, but it won’t bite most people.

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