46 lines
815 B
Plaintext
46 lines
815 B
Plaintext
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#!/usr/bin/env ruby
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if ARGV.size != 2
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puts "Usage: $0 <filename.pcx> <Palette name>"
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exit 1
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end
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FILENAME = ARGV[0]
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PALETTENAME = ARGV[1]
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f = File.open(FILENAME)
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# In a 256-colour PCX file, the palette is stored in the final 768 bytes as RGB
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# triplets, and the byte before that should be 0x0C: https://en.wikipedia.org/wiki/PCX#Color_palette
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f.seek(-769, IO::SEEK_END)
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raise "Check byte is wrong" unless f.read(1) == "\x0C"
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puts <<EOF
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package palettes
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import "image/color"
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var (
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#{PALETTENAME}Palette = color.Palette{
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Transparent,
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EOF
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# bytes.shift(3) # Ignore idx 0 so we can make it transparent
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256.times do
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r, g, b = f.read(3).bytes
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puts "\t\tcolor.RGBA{R: #{r}, G: #{g}, B: #{b}, A: 255},"
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end
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puts <<EOF
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}
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)
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func init() {
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Palettes["#{PALETTENAME}"] = #{PALETTENAME}Palette
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}
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EOF
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