Support for GraphicsMagick

[cblock]

Hi!

Over at http://www.github.com/cblock/exfile-graphicsmagick I created a clone of this repo that runs GraphicsMagick instead of ImageMagick. Initially I thought this could be added to the exfile description as an alternative to exfile-imagemagick. But essentially the only thing I did was to replace system calls to convert with GM convert etc.

So now I think it's not worth the duplication of code and I propose to add a config switch to this repo that lets users choose which library to use. What do you think?

[keichan34]

I don't see a problem with that. Would you prefer an explicit configuration option, or should the library detect if GM is available and automatically use that, falling back on ImageMagick?

[cblock]

I'd prefer an explicit config option with imagemagick being the default config. That way one can explicitly control which library to use.

[keichan34]

Sounds good!