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- Random tools & helpful resources for IRC
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img2irc.py (5233B)
      1 #!/usr/bin/env python
      2 # Scroll IRC Art Bot - Developed by acidvegas in Python (https://git.acid.vegas/scroll)
      3 
      4 '''
      5 Props:
      6 	- forked idea from malcom's img2irc (https://github.com/waveplate/img2irc)
      7 	- big props to wrk (wr34k) for forking this one
      8 	- contrast enhancement, effects, & RBG88 added by acidvegas
      9 
     10 pull request: https://github.com/ircart/scroll/pull/3
     11 
     12 '''
     13 
     14 import io
     15 
     16 try:
     17 	from PIL import Image, ImageEnhance
     18 except ImportError:
     19 	raise SystemExit('missing required \'pillow\' library (https://pypi.org/project/pillow/)')
     20 
     21 palettes = {
     22 	'RGB88': [0xffffff, 0x000000, 0x00007f, 0x009300, 0xff0000, 0x7f0000, 0x9c009c, 0xfc7f00,
     23 			  0xffff00, 0x00fc00, 0x009393, 0x00ffff, 0x0000fc, 0xff00ff, 0x0,      0x0,
     24 			  0x470000, 0x472100, 0x474700, 0x324700, 0x004700, 0x00472c, 0x004747, 0x002747,
     25 			  0x000047, 0x2e0047, 0x470047, 0x47002a, 0x740000, 0x743a00, 0x747400, 0x517400,
     26 			  0x007400, 0x007449, 0x007474, 0x004074, 0x000074, 0x4b0074, 0x740074, 0x740045,
     27 			  0xb50000, 0xb56300, 0xb5b500, 0x7db500, 0x00b500, 0x00b571, 0x00b5b5, 0x0063b5,
     28 			  0x0000b5, 0x7500b5, 0xb500b5, 0xb5006b, 0xff0000, 0xff8c00, 0xffff00, 0xb2ff00,
     29 			  0x00ff00, 0x00ffa0, 0x00ffff, 0x008cff, 0x0000ff, 0xa500ff, 0xff00ff, 0xff0098,
     30 			  0xff5959, 0xffb459, 0xffff71, 0xcfff60, 0x6fff6f, 0x65ffc9, 0x6dffff, 0x59b4ff,
     31 			  0x5959ff, 0xc459ff, 0xff66ff, 0xff59bc, 0xff9c9c, 0xffd39c, 0xffff9c, 0xe2ff9c,
     32 			  0x9cff9c, 0x9cffdb, 0x9cffff, 0x9cd3ff, 0x9c9cff, 0xdc9cff, 0xff9cff, 0xff94d3],
     33 
     34 	'RGB99': [0xffffff, 0x000000, 0x00007f, 0x009300, 0xff0000, 0x7f0000, 0x9c009c, 0xfc7f00,
     35 			  0xffff00, 0x00fc00, 0x009393, 0x00ffff, 0x0000fc, 0xff00ff, 0x7f7f7f, 0xd2d2d2,
     36 			  0x470000, 0x472100, 0x474700, 0x324700, 0x004700, 0x00472c, 0x004747, 0x002747,
     37 			  0x000047, 0x2e0047, 0x470047, 0x47002a, 0x740000, 0x743a00, 0x747400, 0x517400,
     38 			  0x007400, 0x007449, 0x007474, 0x004074, 0x000074, 0x4b0074, 0x740074, 0x740045,
     39 			  0xb50000, 0xb56300, 0xb5b500, 0x7db500, 0x00b500, 0x00b571, 0x00b5b5, 0x0063b5,
     40 			  0x0000b5, 0x7500b5, 0xb500b5, 0xb5006b, 0xff0000, 0xff8c00, 0xffff00, 0xb2ff00,
     41 			  0x00ff00, 0x00ffa0, 0x00ffff, 0x008cff, 0x0000ff, 0xa500ff, 0xff00ff, 0xff0098,
     42 			  0xff5959, 0xffb459, 0xffff71, 0xcfff60, 0x6fff6f, 0x65ffc9, 0x6dffff, 0x59b4ff,
     43 			  0x5959ff, 0xc459ff, 0xff66ff, 0xff59bc, 0xff9c9c, 0xffd39c, 0xffff9c, 0xe2ff9c,
     44 			  0x9cff9c, 0x9cffdb, 0x9cffff, 0x9cd3ff, 0x9c9cff, 0xdc9cff, 0xff9cff, 0xff94d3,
     45 			  0x000000, 0x131313, 0x282828, 0x363636, 0x4d4d4d, 0x656565, 0x818181, 0x9f9f9f,
     46 			  0xbcbcbc, 0xe2e2e2, 0xffffff]
     47 }
     48 
     49 def convert(data, max_line_len, img_width=80, palette='RGB99', enhance=False, effect=None):
     50 	if palette not in palettes:
     51 		raise Exception('invalid palette option')
     52 	palette = palettes[palette]
     53 	image = Image.open(io.BytesIO(data))
     54 	if enhance:
     55 		image = ImageEnhance.Contrast(image)
     56 	if effect == 'grey':
     57 		image = image.convert("L")
     58 	elif effect == 'black':
     59 		image = image.convert("1")
     60 	del data
     61 	return convert_image(image, max_line_len, img_width, palette)
     62 
     63 def convert_image(image, max_line_len, img_width, palette):
     64 	(width, height) = image.size
     65 	img_height = img_width / width * height
     66 	del height, width
     67 	image.thumbnail((img_width, img_height), Image.Resampling.LANCZOS)
     68 	del img_height
     69 	CHAR = '\u2580'
     70 	buf = list()
     71 	for i in range(0, image.size[1], 2):
     72 		if i+1 >= image.size[1]:
     73 			bitmap = [[rgb_to_hex(image.getpixel((x, i))) for x in range(image.size[0])]]
     74 			bitmap += [[0 for _ in range(image.size[0])]]
     75 		else:
     76 			bitmap = [[rgb_to_hex(image.getpixel((x, y))) for x in range(image.size[0])] for y in [i, i+1]]
     77 		top_row = [AnsiPixel(px, palette) for px in bitmap[0]]
     78 		bottom_row = [AnsiPixel(px, palette) for px in bitmap[1]]
     79 		buf += [""]
     80 		last_fg = last_bg = -1
     81 		ansi_row = list()
     82 		for j in range(image.size[0]):
     83 			top_pixel = top_row[j]
     84 			bottom_pixel = bottom_row[j]
     85 			pixel_pair = AnsiPixelPair(top_pixel, bottom_pixel)
     86 			fg = pixel_pair.top.irc
     87 			bg = pixel_pair.bottom.irc
     88 			if j != 0:
     89 				if fg == last_fg and bg == last_bg:
     90 					buf[-1] += CHAR
     91 				elif bg == last_bg:
     92 					buf[-1] += f'\x03{fg}{CHAR}'
     93 				else:
     94 					buf[-1] += f'\x03{fg},{bg}{CHAR}'
     95 			else:
     96 				buf[-1] += f'\x03{fg},{bg}{CHAR}'
     97 			last_fg = fg
     98 			last_bg = bg
     99 		if len(buf[-1].encode('utf-8', 'ignore')) > max_line_len:
    100 			if img_width - 5 < 10:
    101 				raise Exception('internal error')
    102 			return convert_image(image, max_line_len, img_width-5, palette)
    103 	return buf
    104 
    105 def hex_to_rgb(color):
    106 	r = color >> 16
    107 	g = (color >> 8) % 256
    108 	b = color % 256
    109 	return (r,g,b)
    110 
    111 def rgb_to_hex(rgb):
    112 	r = rgb[0]
    113 	g = rgb[1]
    114 	b = rgb[2]
    115 	return (r << 16) + (g << 8) + b
    116 
    117 def color_distance_squared(c1, c2):
    118 	dr = c1[0] - c2[0]
    119 	dg = c1[1] - c2[1]
    120 	db = c1[2] - c2[2]
    121 	return dr * dr + dg * dg + db * db
    122 
    123 class AnsiPixel:
    124 	def __init__(self, pixel_u32, palette):
    125 		self.irc  = self.nearest_hex_color(pixel_u32, palette)
    126 
    127 	def nearest_hex_color(self, pixel_u32, hex_colors):
    128 		rgb_colors = [hex_to_rgb(color) for color in hex_colors]
    129 		rgb_colors.sort(key=lambda rgb: color_distance_squared(hex_to_rgb(pixel_u32), rgb))
    130 		hex_color = rgb_to_hex(rgb_colors[0])
    131 		return hex_colors.index(hex_color)
    132 
    133 class AnsiPixelPair:
    134 	def __init__(self, top, bottom):
    135 		self.top = top
    136 		self.bottom = bottom