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palette_8bit.rb
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palette_8bit.rb
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###
# to run use:
# ruby ./palette_8bit.rb
require 'cryptopunks'
punks = Punks::Image.read( './punks.png' )
ids = [2, 532, 58, 30, 635, 602, 768, 603, 757]
ids.each do |id|
name = '%04d' % id
punks[id].save( "./i/punk-#{name}.png" )
end
require 'pixelart'
ids.each do |id|
name = '%04d' % id
punk = Image.read( "./i/punk-#{name}.png" )
punk_bw = punk.grayscale
punk_bw.save( "./i/punk-#{name}_bw.png" )
punk_bw.scale( 4 ).save( "./i/punk-#{name}_bw4x.png" )
end
def show_colors( img )
colors = Hash.new(0)
img.width.times do |x|
img.height.times do |y|
color = img[x,y]
colors[color] += 1
end
end
puts "#{colors.size} color(s):"
colors.each_with_index do |(color,count),i|
print " [#{i}] "
print '%3d pixel(s) - ' % count
print Color.format( color )
print "\n"
end
end
punk = Image.read( "./i/punk-0002.png" )
puts "before:"
show_colors( punk )
punk_bw = punk.grayscale
puts "after:"
show_colors( punk_bw )
ids.each do |id|
name = '%04d' % id
punk = Image.read( "./i/punk-#{name}.png" )
punk_sepia = punk.change_palette8bit( Palette8bit::SEPIA )
punk_sepia.save( "./i/punk-#{name}_sepia.png" )
punk_sepia.scale( 4 ).save( "./i/punk-#{name}_sepia4x.png" )
punk_blue = punk.change_palette8bit( Palette8bit::BLUE )
punk_blue.save( "./i/punk-#{name}_blue.png" )
punk_blue.scale( 4 ).save( "./i/punk-#{name}_blue4x.png" )
punk_false = punk.change_palette8bit( Palette8bit::FALSE )
punk_false.save( "./i/punk-#{name}_false.png" )
punk_false.scale( 4 ).save( "./i/punk-#{name}_false4x.png" )
end
puts "bye"