Created
November 29, 2018 12:52
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defmodule Pleroma.Upload.Filter.Mogrifun do | |
@behaviour Pleroma.Upload.Filter | |
@filters [ | |
{"implode", "1"}, | |
{"-raise", "20"}, | |
{"+raise", "20"}, | |
[{"-interpolate", "nearest"}, {"-virtual-pixel", "mirror"}, {"-spread", "5"}], | |
"+polaroid", | |
{"-statistic", "Mode 10"}, | |
{"-emboss", "0x1.1"}, | |
{"-emboss", "0x2"}, | |
{"-colorspace", "Gray"}, | |
"-negate", | |
[{"-channel", "green"}, "-negate"], | |
[{"-channel", "red"}, "-negate"], | |
[{"-channel", "blue"}, "-negate"], | |
{"+level-colors", "green,gold"}, | |
{"+level-colors", ",DodgerBlue"}, | |
{"+level-colors", ",Gold"}, | |
{"+level-colors", ",Lime"}, | |
{"+level-colors", ",Red"}, | |
{"+level-colors", ",DarkGreen"}, | |
{"+level-colors", "firebrick,yellow"}, | |
{"+level-colors", "'rgb(102,75,25)',lemonchiffon"}, | |
[{"fill", "red"}, {"tint", "40"}], | |
[{"fill", "green"}, {"tint", "40"}], | |
[{"fill", "blue"}, {"tint", "40"}], | |
[{"fill", "yellow"}, {"tint", "40"}], | |
] | |
def filter(%Pleroma.Upload{tempfile: file, content_type: "image"<>_}) do | |
filter = Enum.random(@filters) | |
file | |
|> Mogrify.open() | |
|> mogrify_filter(filter) | |
|> Mogrify.save(in_place: true) | |
:ok | |
end | |
def filter(_), do: :ok | |
defp mogrify_filter(mogrify, [filter | rest]) do | |
mogrify | |
|> mogrify_filter(filter) | |
|> mogrify_filter(rest) | |
end | |
defp mogrify_filter(mogrify, []), do: mogrify | |
defp mogrify_filter(mogrify, {action, options}) do | |
Mogrify.custom(mogrify, action, options) | |
end | |
defp mogrify_filter(mogrify, string) when is_binary(string) do | |
Mogrify.custom(mogrify, string) | |
end | |
end |
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