1 # Pleroma: A lightweight social networking server
2 # Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
3 # SPDX-License-Identifier: AGPL-3.0-only
5 defmodule Pleroma.Upload.Filter.Mogrifun do
6 @behaviour Pleroma.Upload.Filter
7 alias Pleroma.Upload.Filter
10 This module is just an example of an Upload filter. It's not supposed to be used in production.
17 [{"-interpolate", "nearest"}, {"-virtual-pixel", "mirror"}, {"-spread", "5"}],
19 {"-statistic", "Mode 10"},
22 {"-colorspace", "Gray"},
24 [{"-channel", "green"}, "-negate"],
25 [{"-channel", "red"}, "-negate"],
26 [{"-channel", "blue"}, "-negate"],
27 {"+level-colors", "green,gold"},
28 {"+level-colors", ",DodgerBlue"},
29 {"+level-colors", ",Gold"},
30 {"+level-colors", ",Lime"},
31 {"+level-colors", ",Red"},
32 {"+level-colors", ",DarkGreen"},
33 {"+level-colors", "firebrick,yellow"},
34 {"+level-colors", "'rgb(102,75,25)',lemonchiffon"},
35 [{"fill", "red"}, {"tint", "40"}],
36 [{"fill", "green"}, {"tint", "40"}],
37 [{"fill", "blue"}, {"tint", "40"}],
38 [{"fill", "yellow"}, {"tint", "40"}]
41 @spec filter(Pleroma.Upload.t()) :: {:ok, atom()} | {:error, String.t()}
42 def filter(%Pleroma.Upload{tempfile: file, content_type: "image" <> _}) do
44 Filter.Mogrify.do_filter(file, [Enum.random(@filters)])
48 {:error, "#{__MODULE__}: #{inspect(e)}"}
52 def filter(_), do: {:ok, :noop}