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Adding an ability to crop and resize image like the "#" command in paperclip #14

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Adding an ability to crop and resize image like the "#" command in paperclip #14

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23 changes: 23 additions & 0 deletions lib/attachment_on_the_fly.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -37,6 +37,11 @@ def method_missing(symbol , *args, &block )
size = values[1]
who = "width"
image_name = generate_image(who, size.to_i)
elsif symbol.to_s.match(/^sx_[0-9]+_[0-9]+/) || symbol.to_s.match(/^cls_[0-9]+_[0-9]+/)
values = symbol.to_s.split("_")
height = values[1]
width = values[2]
image_name = generate_image("#", height.to_i, width.to_i)
else
# if our method string does not match, we kick things back up to super ... this keeps ActiveRecord chugging along happily
super
Expand All @@ -56,6 +61,8 @@ def generate_image(kind, height = 0, width = 0)
prefix = "S_" + height.to_s + "_WIDTH_"
elsif kind == "both"
prefix = "S_" + height.to_s + "_" + height.to_s + "_"
elsif kind == "#"
prefix = "SX_" + height.to_s + "_" + width.to_s + "_"
end

path = self.path
Expand Down Expand Up @@ -100,6 +107,22 @@ def generate_image(kind, height = 0, width = 0)
elsif kind == "both"
# resize_image infilename, outfilename, height, width
command = "#{convert_command_path}convert -colorspace RGB -geometry #{width}x#{height} -quality 100 -sharpen 1 #{original} #{newfilename} 2>&1 > /dev/null"
elsif kind == "#"

# resize and crop the image like the # command in the paperclip
geo = Paperclip::Geometry.from_file(original)
width_difference = geo.width/width
height_difference = geo.height/height
if width_difference < height_difference
command = "#{convert_command_path}convert -colorspace RGB -geometry #{width} -quality 100 -sharpen 1 #{original} #{newfilename} 2>&1 > /dev/null"
else
command = "#{convert_command_path}convert -colorspace RGB -geometry x#{height} -quality 100 -sharpen 1 #{original} #{newfilename} 2>&1 > /dev/null"
end
#resize
`#{command}`

# crop
command = "#{convert_command_path}convert -colorspace RGB -gravity Center -crop #{width}x#{height}+0+0 +repage -quality 100 #{newfilename} #{newfilename} 2>&1 > /dev/null"
end

`#{command}`
Expand Down