ActiveStorage variant composite

Question

I need to add watermarks to images, cmd ImageMagick command

convert image.png watermark.png -composite target.jpg 

or

composite -watermark 30% -tile watermark.png image.png target.jpg

How can I do this operation with ActiveStorage::Variant?

Answer 1

Try this:

def medium_img_watermark
    if self.img_first.attached?
      self.img_first.variant(resize: '1200', quality: 75, density: 96,
                             combine_options: {
                              gravity: 'center',
                              draw: 'image Over 0,0 0,0 "public/logo_white.png"'
                            }).processed
    end
  end