54 lines
1.6 KiB
Elixir
54 lines
1.6 KiB
Elixir
# Pleroma: A lightweight social networking server
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# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
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# SPDX-License-Identifier: AGPL-3.0-only
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defmodule Pleroma.Upload.Filter.Mogrifun do
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@behaviour Pleroma.Upload.Filter
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alias Pleroma.Upload.Filter
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@moduledoc """
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This module is just an example of an Upload filter. It's not supposed to be used in production.
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"""
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@filters [
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{"implode", "1"},
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{"-raise", "20"},
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{"+raise", "20"},
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[{"-interpolate", "nearest"}, {"-virtual-pixel", "mirror"}, {"-spread", "5"}],
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"+polaroid",
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{"-statistic", "Mode 10"},
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{"-emboss", "0x1.1"},
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{"-emboss", "0x2"},
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{"-colorspace", "Gray"},
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"-negate",
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[{"-channel", "green"}, "-negate"],
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[{"-channel", "red"}, "-negate"],
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[{"-channel", "blue"}, "-negate"],
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{"+level-colors", "green,gold"},
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{"+level-colors", ",DodgerBlue"},
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{"+level-colors", ",Gold"},
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{"+level-colors", ",Lime"},
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{"+level-colors", ",Red"},
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{"+level-colors", ",DarkGreen"},
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{"+level-colors", "firebrick,yellow"},
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{"+level-colors", "'rgb(102,75,25)',lemonchiffon"},
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[{"fill", "red"}, {"tint", "40"}],
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[{"fill", "green"}, {"tint", "40"}],
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[{"fill", "blue"}, {"tint", "40"}],
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[{"fill", "yellow"}, {"tint", "40"}]
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]
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@spec filter(Pleroma.Upload.t()) :: {:ok, :filtered | :noop} | {:error, String.t()}
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def filter(%Pleroma.Upload{tempfile: file, content_type: "image" <> _}) do
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try do
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Filter.Mogrify.do_filter(file, [Enum.random(@filters)])
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{:ok, :filtered}
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rescue
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e in ErlangError ->
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{:error, "#{__MODULE__}: #{inspect(e)}"}
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end
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end
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def filter(_), do: {:ok, :noop}
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end
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