git.squeep.com Git - akkoma/blob - lib/pleroma/upload/filter/mogrifun.ex

   1 defmodule Pleroma.Upload.Filter.Mogrifun do
   2   @behaviour Pleroma.Upload.Filter
   3
   4   @filters [
   5     {"implode", "1"},
   6     {"-raise", "20"},
   7     {"+raise", "20"},
   8     [{"-interpolate", "nearest"}, {"-virtual-pixel", "mirror"}, {"-spread", "5"}],
   9     "+polaroid",
  10     {"-statistic", "Mode 10"},
  11     {"-emboss", "0x1.1"},
  12     {"-emboss", "0x2"},
  13     {"-colorspace", "Gray"},
  14     "-negate",
  15     [{"-channel", "green"}, "-negate"],
  16     [{"-channel", "red"}, "-negate"],
  17     [{"-channel", "blue"}, "-negate"],
  18     {"+level-colors", "green,gold"},
  19     {"+level-colors", ",DodgerBlue"},
  20     {"+level-colors", ",Gold"},
  21     {"+level-colors", ",Lime"},
  22     {"+level-colors", ",Red"},
  23     {"+level-colors", ",DarkGreen"},
  24     {"+level-colors", "firebrick,yellow"},
  25     {"+level-colors", "'rgb(102,75,25)',lemonchiffon"},
  26     [{"fill", "red"}, {"tint", "40"}],
  27     [{"fill", "green"}, {"tint", "40"}],
  28     [{"fill", "blue"}, {"tint", "40"}],
  29     [{"fill", "yellow"}, {"tint", "40"}]
  30   ]
  31
  32   def filter(%Pleroma.Upload{tempfile: file, content_type: "image" <> _}) do
  33     filter = Enum.random(@filters)
  34
  35     file
  36     |> Mogrify.open()
  37     |> mogrify_filter(filter)
  38     |> Mogrify.save(in_place: true)
  39
  40     :ok
  41   end
  42
  43   def filter(_), do: :ok
  44
  45   defp mogrify_filter(mogrify, [filter | rest]) do
  46     mogrify
  47     |> mogrify_filter(filter)
  48     |> mogrify_filter(rest)
  49   end
  50
  51   defp mogrify_filter(mogrify, []), do: mogrify
  52
  53   defp mogrify_filter(mogrify, {action, options}) do
  54     Mogrify.custom(mogrify, action, options)
  55   end
  56
  57   defp mogrify_filter(mogrify, string) when is_binary(string) do
  58     Mogrify.custom(mogrify, string)
  59   end
  60 end