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I have an image style which has Desaturate and Scale & Crop turned on.

I call it using this:

<a href="<?php print image_style_url('gallery_full', $image['uri']); ?>"><img src="<?php print image_style_url('gallery_thumb_grey', $image['uri']); ?>" /></a>

It outputs the image resized but doesn't desaturate it. There are no errors.

Any ideas?

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  • Which image toolkit are you using, GD or ImageMagick? – mpdonadio Oct 18 '11 at 23:27
  • This one is using GD. – Joren Oct 18 '11 at 23:45
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This is kind of a crappy answer, but the fix was to switch to using ImageMagick. I still don't know what was wrong with GD.

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I found the following discussion on g.d.o to be the most helpful for my particular case of an Ubuntu 8 LTS server which comes with outdated GD libraries.

http://groups.drupal.org/node/35764

Essentially, the only way to get Drupal 7 image desaturation working, without resorting to imagemagick, is to recompile php using the --with-gd option.

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