50 lines
1.1 KiB
Ruby
50 lines
1.1 KiB
Ruby
require "zlib"
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lines = [*$<]
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if lines.join.gsub(/\e\[\d*m/, "").chars.uniq.sort == ["\n", " "]
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matrix = lines.map do |line|
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row = []
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cell = nil
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line.chomp.scan(/\G(?:\e\[(\d+)m|..)/) do
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if $1
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cell = $1 == "40" ? :black : :white
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else
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row << cell
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end
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end
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row
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end
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size = matrix.size
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if size != matrix.first.size
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raise "not square: #{ matrix.first.size } x #{ matrix.size }"
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end
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$stderr.puts "Version: #{ (size - 25) / 4 }"
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scale = 400 / size
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data = (0 ... scale * size).flat_map do |y|
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[0] + (0 ... scale * size).flat_map do |x|
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matrix[y / scale][x / scale] == :black ? [0, 0, 0] : [255, 255, 255]
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end
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end
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print "\x89PNG\r\n\x1a\n"
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[
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["IHDR", [scale * size, scale * size, 8, 2, 0, 0, 0].pack("NNCCCCC")],
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["IDAT", Zlib::Deflate.deflate(data.pack("C*"))],
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["IEND", ""],
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].each do |type, data|
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print [data.bytesize, type, data, Zlib.crc32(type + data)].pack("NA4A*N")
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end
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else
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width = lines.map {|line| line.chomp.size + 4 * 4 }.max
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lines.each do |line|
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puts line.chomp.ljust(width).gsub(/../) { "\e[#{ $& == " " ? 47 : 40 }m " }
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end
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end
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