43 lines
1.1 KiB
Elixir
43 lines
1.1 KiB
Elixir
defmodule Mobilizon.Web.Upload.Filter.Resize do
|
|
@moduledoc """
|
|
Resize the pictures if they're bigger than maximum size.
|
|
|
|
This filter requires `Mobilizon.Web.Upload.Filter.AnalyzeMetadata` to be performed before.
|
|
"""
|
|
|
|
@behaviour Mobilizon.Web.Upload.Filter
|
|
|
|
@maximum_width 1_920
|
|
@maximum_height 1_080
|
|
|
|
def filter(%Mobilizon.Web.Upload{
|
|
tempfile: file,
|
|
content_type: "image" <> _,
|
|
width: width,
|
|
height: height
|
|
}) do
|
|
file
|
|
|> Mogrify.open()
|
|
|> Mogrify.resize(string(limit_sizes({width, height})))
|
|
|> Mogrify.save(in_place: true)
|
|
|
|
{:ok, :filtered}
|
|
end
|
|
|
|
def filter(_), do: {:ok, :noop}
|
|
|
|
def limit_sizes({width, height}) when width > @maximum_width do
|
|
new_height = round(@maximum_width * height / width)
|
|
limit_sizes({@maximum_width, new_height})
|
|
end
|
|
|
|
def limit_sizes({width, height}) when height > @maximum_height do
|
|
new_width = round(@maximum_height * width / height)
|
|
limit_sizes({new_width, @maximum_height})
|
|
end
|
|
|
|
def limit_sizes({width, height}), do: {width, height}
|
|
|
|
defp string({width, height}), do: "#{width}x#{height}"
|
|
end
|