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sunny0425/uploader.rb

Created November 19, 2013 03:44
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use carrirewave and mini-magick to change the png image's color
Raw
uploader.rb
class Uploader < CarrierWave::Uploader::Base
version :full do
process resize_to_fit: [960, 640]
process :set_color
end
def set_color
color = 'gold'
# convert old.png -alpha off -fill gold -colorize 100% -alpha on new.png
manipulate! do |img|
img.combine_options do |cmd|
cmd.alpha('off')
cmd.fill(color)
cmd.colorize('100%')
cmd.alpha('on')
end
img = yield(img) if block_given?
img
end
end
end
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