muffinista/find-colors.rb Secret

## find-colors.rb
#!/usr/bin/env ruby

#
# parse a PNG file for its colors. the output is built for a processing script but you could use it anywhere with some tweaks
#

require 'rubygems'
require 'RMagick'

NUM_COLORS = 256

img = Magick::Image.read('from-basic-palette.png').first

rows = NUM_COLORS / 16
cols = NUM_COLORS / 16

block_width = img.columns / cols
block_height = img.rows / rows

puts "*** #{rows} x #{cols}"

MAX = 65535
DEST = 255

0.upto(rows - 1) do |row|
	data = []
	0.upto(cols - 1) do |col|
		# puts "#{col}, #{row}"

		# pixels to sample
		start_x = block_width * col
		start_y = block_height * row

		block = img.crop(start_x, start_y, block_width, block_height)
		pixels = block.color_histogram.sort_by { |k, v| -v}
		# binding.pry
		# pixel = pixels.keys.first
		pixel = pixels.first.first

		r = ((pixel.red.to_f / MAX) * DEST).to_i
		g = ((pixel.green.to_f / MAX) * DEST).to_i
		b = ((pixel.blue.to_f / MAX) * DEST).to_i

		# puts "#{col} #{row} #{r} #{g} #{b}"
		data << [r, g, b]
	end
	puts data.collect { |d|
		"color(#{d[0]}, #{d[1]}, #{d[2]})"
	}.join(", ")
end


## palette.bas
10 REM * DISPLAY ALL 256 COLORS
11 GRAPHICS 9:FOR V=0 TO 15:COLOR V
12 FOR N=0 TO 4:PLOT 5*V+N,0
13 DRAWTO 5*V+N,191:NEXT N:NEXT V
14 D=256*PEEK(561)+PEEK(560)
15 FOR N=1 TO 16:READ V:POKE D+V,143
16 NEXT N:FOR N=0 TO 25:READ V
17 POKE 1664+N,V:NEXT N:POKE 512,139
18 POKE 513,6:POKE 546,128:POKE 547,6
19 POKE 53248,40:POKE 53249,208
20 POKE 53261,255:POKE 53262,255
21 POKE 53266,0:POKE 53267,0
22 POKE 54286,192
23 GOTO 23
24 DATA 16,28,40,52,64,76,88,102,114
25 DATA 126,138,150,162,174,186,198
26 DATA 8,72,169,0,133,203,104,40,76
27 DATA 95,228,8,72,165,203,24,105,16
28 DATA 141,26,208,133,203,104,40,64

## results
color(0, 0, 0), color(16, 15, 16), color(40, 37, 40), color(59, 59, 59), color(78, 77, 78), color(97, 95, 97), color(113, 112, 113), color(129, 129, 129), color(140, 139, 140), color(154, 154, 154), color(169, 169, 169), color(184, 184, 184), color(197, 197, 197), color(212, 211, 212), color(225, 225, 225), color(229, 229, 229)
color(67, 3, 0), color(81, 14, 0), color(99, 36, 0), color(114, 56, 0), color(127, 75, 0), color(145, 92, 0), color(159, 108, 0), color(173, 125, 4), color(182, 135, 22), color(197, 151, 47), color(209, 165, 67), color(224, 181, 87), color(230, 193, 102), color(230, 207, 120), color(229, 221, 137), color(229, 227, 153)
color(81, 5, 0), color(95, 7, 0), color(109, 23, 0), color(126, 44, 0), color(138, 63, 0), color(155, 81, 0), color(169, 99, 17), color(184, 116, 43), color(193, 125, 58), color(206, 142, 76), color(219, 157, 96), color(231, 173, 114), color(231, 185, 129), color(231, 200, 145), color(230, 212, 160), color(229, 226, 175)
color(92, 7, 0), color(106, 9, 0), color(122, 12, 0), color(137, 27, 23), color(151, 47, 43), color(165, 67, 65), color(178, 85, 84), color(193, 104, 103), color(202, 115, 112), color(215, 130, 128), color(228, 145, 143), color(231, 161, 160), color(230, 174, 175), color(230, 188, 190), color(230, 202, 203), color(230, 215, 216)
color(68, 13, 87), color(85, 17, 100), color(100, 22, 115), color(117, 29, 130), color(130, 44, 144), color(145, 64, 160), color(160, 81, 174), color(175, 99, 187), color(185, 109, 196), color(199, 125, 210), color(213, 136, 223), color(226, 156, 229), color(231, 169, 229), color(231, 183, 230), color(230, 197, 229), color(231, 210, 230)
color(53, 17, 112), color(67, 21, 122), color(88, 25, 137), color(104, 33, 151), color(120, 48, 165), color(135, 67, 178), color(150, 84, 192), color(164, 102, 206), color(174, 112, 214), color(188, 129, 227), color(202, 144, 230), color(216, 159, 230), color(228, 172, 229), color(230, 185, 229), color(231, 198, 230), color(230, 212, 229)
color(30, 20, 127), color(46, 23, 139), color(66, 27, 151), color(85, 39, 166), color(101, 56, 179), color(116, 73, 193), color(132, 90, 204), color(148, 108, 218), color(158, 117, 226), color(172, 133, 230), color(186, 147, 229), color(202, 162, 229), color(215, 175, 229), color(228, 189, 229), color(231, 202, 230), color(230, 216, 229)
color(1, 19, 126), color(1, 23, 138), color(14, 39, 152), color(36, 57, 165), color(57, 73, 178), color(76, 91, 192), color(93, 107, 204), color(112, 124, 218), color(122, 134, 225), color(128, 149, 230), color(153, 163, 229), color(170, 177, 229), color(184, 189, 230), color(196, 205, 229), color(211, 217, 229), color(225, 228, 230)
color(1, 16, 108), color(0, 29, 118), color(0, 50, 134), color(5, 67, 149), color(30, 84, 162), color(54, 102, 176), color(73, 118, 188), color(91, 134, 204), color(103, 143, 212), color(119, 160, 225), color(136, 173, 229), color(151, 187, 229), color(168, 199, 230), color(181, 213, 229), color(196, 226, 229), color(211, 229, 229)
color(0, 22, 86), color(0, 39, 97), color(0, 59, 113), color(0, 77, 128), color(8, 93, 143), color(37, 108, 158), color(58, 125, 172), color(78, 141, 188), color(88, 151, 195), color(105, 166, 208), color(123, 181, 222), color(139, 194, 230), color(155, 207, 229), color(170, 220, 229), color(185, 229, 230), color(199, 229, 229)
color(0, 55, 0), color(0, 70, 0), color(0, 86, 1), color(0, 102, 25), color(0, 117, 44), color(0, 133, 65), color(23, 148, 85), color(50, 163, 102), color(64, 172, 112), color(83, 187, 128), color(102, 200, 144), color(120, 214, 160), color(134, 226, 174), color(150, 228, 188), color(167, 228, 203), color(183, 228, 217)
color(0, 59, 0), color(0, 74, 0), color(0, 89, 0), color(0, 104, 0), color(1, 120, 0), color(36, 136, 0), color(58, 149, 0), color(80, 165, 7), color(90, 173, 24), color(109, 188, 47), color(125, 200, 69), color(144, 215, 89), color(156, 225, 103), color(172, 227, 120), color(188, 227, 139), color(203, 227, 155)
color(0, 50, 0), color(0, 66, 0), color(0, 84, 0), color(22, 99, 0), color(44, 115, 0), color(65, 131, 0), color(83, 145, 0), color(102, 161, 0), color(112, 169, 0), color(129, 183, 12), color(145, 197, 39), color(160, 211, 59), color(174, 223, 78), color(190, 227, 98), color(203, 226, 116), color(218, 227, 131)
color(0, 35, 0), color(16, 52, 0), color(39, 71, 0), color(61, 87, 0), color(77, 104, 0), color(97, 121, 0), color(112, 134, 0), color(129, 150, 0), color(139, 159, 0), color(164, 174, 1), color(170, 188, 30), color(184, 202, 54), color(197, 214, 72), color(211, 226, 90), color(225, 227, 109), color(229, 227, 127)
color(36, 12, 0), color(56, 33, 0), color(73, 53, 0), color(91, 71, 0), color(105, 89, 0), color(123, 106, 0), color(138, 122, 0), color(153, 138, 0), color(162, 147, 0), color(178, 163, 11), color(192, 175, 38), color(206, 191, 60), color(218, 204, 78), color(229, 218, 97), color(230, 227, 116), color(230, 228, 132)
color(66, 3, 0), color(82, 13, 0), color(99, 35, 0), color(115, 56, 0), color(128, 75, 0), color(144, 92, 0), color(159, 107, 0), color(174, 125, 4), color(183, 135, 24), color(197, 150, 47), color(209, 164, 67), color(224, 181, 88), color(230, 192, 102), color(231, 206, 123), color(229, 220, 137), color(230, 228, 154)
	#!/usr/bin/env ruby

	#
	# parse a PNG file for its colors. the output is built for a processing script but you could use it anywhere with some tweaks
	#

	require 'rubygems'
	require 'RMagick'

	NUM_COLORS = 256

	img = Magick::Image.read('from-basic-palette.png').first

	rows = NUM_COLORS / 16
	cols = NUM_COLORS / 16

	block_width = img.columns / cols
	block_height = img.rows / rows

	puts "*** #{rows} x #{cols}"

	MAX = 65535
	DEST = 255

	0.upto(rows - 1) do \|row\|
	data = []
	0.upto(cols - 1) do \|col\|
	# puts "#{col}, #{row}"

	# pixels to sample
	start_x = block_width * col
	start_y = block_height * row

	block = img.crop(start_x, start_y, block_width, block_height)
	pixels = block.color_histogram.sort_by { \|k, v\| -v}
	# binding.pry
	# pixel = pixels.keys.first
	pixel = pixels.first.first

	r = ((pixel.red.to_f / MAX) * DEST).to_i
	g = ((pixel.green.to_f / MAX) * DEST).to_i
	b = ((pixel.blue.to_f / MAX) * DEST).to_i

	# puts "#{col} #{row} #{r} #{g} #{b}"
	data << [r, g, b]
	end
	puts data.collect { \|d\|
	"color(#{d[0]}, #{d[1]}, #{d[2]})"
	}.join(", ")
	end
	10 REM * DISPLAY ALL 256 COLORS
	11 GRAPHICS 9:FOR V=0 TO 15:COLOR V
	12 FOR N=0 TO 4:PLOT 5*V+N,0
	13 DRAWTO 5*V+N,191:NEXT N:NEXT V
	14 D=256*PEEK(561)+PEEK(560)
	15 FOR N=1 TO 16:READ V:POKE D+V,143
	16 NEXT N:FOR N=0 TO 25:READ V
	17 POKE 1664+N,V:NEXT N:POKE 512,139
	18 POKE 513,6:POKE 546,128:POKE 547,6
	19 POKE 53248,40:POKE 53249,208
	20 POKE 53261,255:POKE 53262,255
	21 POKE 53266,0:POKE 53267,0
	22 POKE 54286,192
	23 GOTO 23
	24 DATA 16,28,40,52,64,76,88,102,114
	25 DATA 126,138,150,162,174,186,198
	26 DATA 8,72,169,0,133,203,104,40,76
	27 DATA 95,228,8,72,165,203,24,105,16
	28 DATA 141,26,208,133,203,104,40,64
	color(0, 0, 0), color(16, 15, 16), color(40, 37, 40), color(59, 59, 59), color(78, 77, 78), color(97, 95, 97), color(113, 112, 113), color(129, 129, 129), color(140, 139, 140), color(154, 154, 154), color(169, 169, 169), color(184, 184, 184), color(197, 197, 197), color(212, 211, 212), color(225, 225, 225), color(229, 229, 229)
	color(67, 3, 0), color(81, 14, 0), color(99, 36, 0), color(114, 56, 0), color(127, 75, 0), color(145, 92, 0), color(159, 108, 0), color(173, 125, 4), color(182, 135, 22), color(197, 151, 47), color(209, 165, 67), color(224, 181, 87), color(230, 193, 102), color(230, 207, 120), color(229, 221, 137), color(229, 227, 153)
	color(81, 5, 0), color(95, 7, 0), color(109, 23, 0), color(126, 44, 0), color(138, 63, 0), color(155, 81, 0), color(169, 99, 17), color(184, 116, 43), color(193, 125, 58), color(206, 142, 76), color(219, 157, 96), color(231, 173, 114), color(231, 185, 129), color(231, 200, 145), color(230, 212, 160), color(229, 226, 175)
	color(92, 7, 0), color(106, 9, 0), color(122, 12, 0), color(137, 27, 23), color(151, 47, 43), color(165, 67, 65), color(178, 85, 84), color(193, 104, 103), color(202, 115, 112), color(215, 130, 128), color(228, 145, 143), color(231, 161, 160), color(230, 174, 175), color(230, 188, 190), color(230, 202, 203), color(230, 215, 216)
	color(68, 13, 87), color(85, 17, 100), color(100, 22, 115), color(117, 29, 130), color(130, 44, 144), color(145, 64, 160), color(160, 81, 174), color(175, 99, 187), color(185, 109, 196), color(199, 125, 210), color(213, 136, 223), color(226, 156, 229), color(231, 169, 229), color(231, 183, 230), color(230, 197, 229), color(231, 210, 230)
	color(53, 17, 112), color(67, 21, 122), color(88, 25, 137), color(104, 33, 151), color(120, 48, 165), color(135, 67, 178), color(150, 84, 192), color(164, 102, 206), color(174, 112, 214), color(188, 129, 227), color(202, 144, 230), color(216, 159, 230), color(228, 172, 229), color(230, 185, 229), color(231, 198, 230), color(230, 212, 229)
	color(30, 20, 127), color(46, 23, 139), color(66, 27, 151), color(85, 39, 166), color(101, 56, 179), color(116, 73, 193), color(132, 90, 204), color(148, 108, 218), color(158, 117, 226), color(172, 133, 230), color(186, 147, 229), color(202, 162, 229), color(215, 175, 229), color(228, 189, 229), color(231, 202, 230), color(230, 216, 229)
	color(1, 19, 126), color(1, 23, 138), color(14, 39, 152), color(36, 57, 165), color(57, 73, 178), color(76, 91, 192), color(93, 107, 204), color(112, 124, 218), color(122, 134, 225), color(128, 149, 230), color(153, 163, 229), color(170, 177, 229), color(184, 189, 230), color(196, 205, 229), color(211, 217, 229), color(225, 228, 230)
	color(1, 16, 108), color(0, 29, 118), color(0, 50, 134), color(5, 67, 149), color(30, 84, 162), color(54, 102, 176), color(73, 118, 188), color(91, 134, 204), color(103, 143, 212), color(119, 160, 225), color(136, 173, 229), color(151, 187, 229), color(168, 199, 230), color(181, 213, 229), color(196, 226, 229), color(211, 229, 229)
	color(0, 22, 86), color(0, 39, 97), color(0, 59, 113), color(0, 77, 128), color(8, 93, 143), color(37, 108, 158), color(58, 125, 172), color(78, 141, 188), color(88, 151, 195), color(105, 166, 208), color(123, 181, 222), color(139, 194, 230), color(155, 207, 229), color(170, 220, 229), color(185, 229, 230), color(199, 229, 229)
	color(0, 55, 0), color(0, 70, 0), color(0, 86, 1), color(0, 102, 25), color(0, 117, 44), color(0, 133, 65), color(23, 148, 85), color(50, 163, 102), color(64, 172, 112), color(83, 187, 128), color(102, 200, 144), color(120, 214, 160), color(134, 226, 174), color(150, 228, 188), color(167, 228, 203), color(183, 228, 217)
	color(0, 59, 0), color(0, 74, 0), color(0, 89, 0), color(0, 104, 0), color(1, 120, 0), color(36, 136, 0), color(58, 149, 0), color(80, 165, 7), color(90, 173, 24), color(109, 188, 47), color(125, 200, 69), color(144, 215, 89), color(156, 225, 103), color(172, 227, 120), color(188, 227, 139), color(203, 227, 155)
	color(0, 50, 0), color(0, 66, 0), color(0, 84, 0), color(22, 99, 0), color(44, 115, 0), color(65, 131, 0), color(83, 145, 0), color(102, 161, 0), color(112, 169, 0), color(129, 183, 12), color(145, 197, 39), color(160, 211, 59), color(174, 223, 78), color(190, 227, 98), color(203, 226, 116), color(218, 227, 131)
	color(0, 35, 0), color(16, 52, 0), color(39, 71, 0), color(61, 87, 0), color(77, 104, 0), color(97, 121, 0), color(112, 134, 0), color(129, 150, 0), color(139, 159, 0), color(164, 174, 1), color(170, 188, 30), color(184, 202, 54), color(197, 214, 72), color(211, 226, 90), color(225, 227, 109), color(229, 227, 127)
	color(36, 12, 0), color(56, 33, 0), color(73, 53, 0), color(91, 71, 0), color(105, 89, 0), color(123, 106, 0), color(138, 122, 0), color(153, 138, 0), color(162, 147, 0), color(178, 163, 11), color(192, 175, 38), color(206, 191, 60), color(218, 204, 78), color(229, 218, 97), color(230, 227, 116), color(230, 228, 132)
	color(66, 3, 0), color(82, 13, 0), color(99, 35, 0), color(115, 56, 0), color(128, 75, 0), color(144, 92, 0), color(159, 107, 0), color(174, 125, 4), color(183, 135, 24), color(197, 150, 47), color(209, 164, 67), color(224, 181, 88), color(230, 192, 102), color(231, 206, 123), color(229, 220, 137), color(230, 228, 154)