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61 lines
1.8 KiB
Elixir
61 lines
1.8 KiB
Elixir
defmodule PhilomenaMedia.Processors.Svg do
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@moduledoc false
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alias PhilomenaMedia.Intensities
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alias PhilomenaMedia.Analyzers.Result
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alias PhilomenaMedia.Processors.Processor
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alias PhilomenaMedia.Processors
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@behaviour Processor
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@spec versions(Processors.version_list()) :: [Processors.version_filename()]
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def versions(sizes) do
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sizes
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|> Enum.map(fn {name, _} -> "#{name}.png" end)
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|> Kernel.++(["rendered.png", "full.png"])
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end
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@spec process(Result.t(), Path.t(), Processors.version_list()) :: Processors.edit_script()
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def process(_analysis, file, versions) do
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preview = preview(file)
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{:ok, intensities} = Intensities.file(preview)
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scaled = Enum.flat_map(versions, &scale(preview, &1))
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full = [{:copy, preview, "full.png"}]
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[
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intensities: intensities,
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thumbnails: scaled ++ full ++ [{:copy, preview, "rendered.png"}]
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]
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end
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@spec post_process(Result.t(), Path.t()) :: Processors.edit_script()
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def post_process(_analysis, _file), do: []
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@spec intensities(Result.t(), Path.t()) :: Intensities.t()
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def intensities(_analysis, file) do
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{:ok, intensities} = Intensities.file(preview(file))
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intensities
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end
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defp preview(file) do
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preview = Briefly.create!(extname: ".png")
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{_output, 0} = System.cmd("safe-rsvg-convert", [file, preview])
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preview
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end
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defp scale(preview, {thumb_name, {width, height}}) do
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scaled = Briefly.create!(extname: ".png")
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scale_filter = "scale=w=#{width}:h=#{height}:force_original_aspect_ratio=decrease"
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{_output, 0} =
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System.cmd("ffmpeg", ["-loglevel", "0", "-y", "-i", preview, "-vf", scale_filter, scaled])
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{_output, 0} = System.cmd("optipng", ["-i0", "-o1", "-quiet", "-clobber", scaled])
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[{:copy, scaled, "#{thumb_name}.png"}]
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end
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end
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