Getting image dimensions with file_column

rubyonrails-talk
1

If I'm using file_column and RMagick to upload images and associate them with my database records, what should I do to find out the exact dimensions of a given image?

I can use the url_for_file_column command to link to them, but I'm not sure how to find out the image's height and width in my program.

I don't remember where I got it, but this works for jpegs... used like:

jpeg = JPEG.new("some.jpeg") puts jpeg.width puts jpeg.height

2

Thanks. I'm pretty certain RMagick actually has that stuff built into it, I'm just not sure how to access it from inside my Rails application.

Me too, but the less I can use imagemagick the happier I am :slight_smile: I was really close to copying the source from php's getimagesize function which can do gif, png, and bitmap as well, but found this which was enough for me...