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# frozen_string_literal: true
module Booru
module ImageProcessing
class Processor
attr_reader :rasterized # actually rasterized or still previews
attr_reader :log
def initialize(original_path, directory, metadata)
@original_path = original_path
@directory = directory
@rasterized = original_path
@metadata = metadata
@log = []
end
# Apply pre-processing to the image. This is anything that should be done to the original
# file, before any of the versions are generated. (eg: sanitization, rasterization)
def pre_process
# do nothing by default
end
# Generate the rasterized / still version of the image, used for intensities.
def generate_rasterized
# do nothing by default
end
# generate a version of the image with the given dimensions, and
# write it out to the given path.
def generate_version(dimensions, destination_path)
# you should do something here
raise NotImplementedError
end
def generate_compressed_version(dimensions, destination_path)
write_log "generate_compressed_version #{dimensions} #{destination_path}"
width, height = dimensions
# thanks byte[]
scale_filter = "scale=w=#{width}:h=#{height}:force_original_aspect_ratio=decrease,format=rgb32"
ffmpeg '-i', @rasterized,
'-vf', scale_filter,
'-vcodec', 'libwebp',
'-lossless', '0',
'-compression_level', '6',
'-preset', 'default',
'-q:v', '80',
destination_path
end
# generate the full version of the image; this could be multiple versions.
def generate_full_version(destination_path)
FileUtils.ln_sf(@original_path, destination_path)
end
# special case processing for eg: WebM to gif conversion.
def additional_process
# do nothing
end
# Apply post-processing to the image. This is anything that should be done to the original
# file, after all of the versions are generated. (eg: lossless compression)
def post_process
# do nothing by default
end
def is_video?
false
end
def write_log(message)
now = DateTime.now.strftime('%d/%m/%Y %H:%M:%S')
@log << "[#{now}] #{message}"
end
def platform_link(source, destination)
FileUtils.ln_sf(source, destination)
rescue Errno::EPROTO
FileUtils.cp(source, destination)
end
end
end
end
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