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Updated img2irc.py
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173
art/img2irc.py
173
art/img2irc.py
@ -5,6 +5,7 @@
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Props:
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- forked idea from malcom's img2irc (https://github.com/waveplate/img2irc)
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- big props to wrk (wr34k) for forking this one
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- contrast enhancement, effects, & RBG88 added by acidvegas
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pull request: https://github.com/ircart/scroll/pull/3
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@ -13,65 +14,24 @@ pull request: https://github.com/ircart/scroll/pull/3
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import io
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try:
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from PIL import Image
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from PIL import Image, ImageEnhance
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except ImportError:
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raise SystemExit('missing required \'pillow\' library (https://pypi.org/project/pillow/)')
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async def convert(data, img_width=80):
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image = Image.open(io.BytesIO(data))
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del data
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(width, height) = image.size
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img_height = img_width / width * height
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del height, width
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image.thumbnail((img_width, img_height), Image.Resampling.LANCZOS)
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del img_height, img_width
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ansi_image = AnsiImage(image)
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del image
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CHAR = '\u2580'
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buf = ''
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for (y, row) in enumerate(ansi_image.halfblocks):
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last_fg = -1
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last_bg = -1
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for (x, pixel_pair) in enumerate(row):
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fg = pixel_pair.top.irc
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bg = pixel_pair.bottom.irc
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if x != 0:
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if fg == last_fg and bg == last_bg:
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buf += CHAR
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elif bg == last_bg:
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buf += f'\x03{fg}{CHAR}'
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else:
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buf += f'\x03{fg},{bg}{CHAR}'
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else:
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buf += f'\x03{fg},{bg}{CHAR}'
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last_fg = fg
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last_bg = bg
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if y != len(ansi_image.halfblocks) - 1:
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buf += '\n'
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else:
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buf += '\x0f'
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return buf.splitlines()
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palettes = {
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'RGB88': [0xffffff, 0x000000, 0x00007f, 0x009300, 0xff0000, 0x7f0000, 0x9c009c, 0xfc7f00,
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0xffff00, 0x00fc00, 0x009393, 0x00ffff, 0x0000fc, 0xff00ff, 0x0, 0x0,
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0x470000, 0x472100, 0x474700, 0x324700, 0x004700, 0x00472c, 0x004747, 0x002747,
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0x000047, 0x2e0047, 0x470047, 0x47002a, 0x740000, 0x743a00, 0x747400, 0x517400,
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0x007400, 0x007449, 0x007474, 0x004074, 0x000074, 0x4b0074, 0x740074, 0x740045,
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0xb50000, 0xb56300, 0xb5b500, 0x7db500, 0x00b500, 0x00b571, 0x00b5b5, 0x0063b5,
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0x0000b5, 0x7500b5, 0xb500b5, 0xb5006b, 0xff0000, 0xff8c00, 0xffff00, 0xb2ff00,
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0x00ff00, 0x00ffa0, 0x00ffff, 0x008cff, 0x0000ff, 0xa500ff, 0xff00ff, 0xff0098,
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0xff5959, 0xffb459, 0xffff71, 0xcfff60, 0x6fff6f, 0x65ffc9, 0x6dffff, 0x59b4ff,
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0x5959ff, 0xc459ff, 0xff66ff, 0xff59bc, 0xff9c9c, 0xffd39c, 0xffff9c, 0xe2ff9c,
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0x9cff9c, 0x9cffdb, 0x9cffff, 0x9cd3ff, 0x9c9cff, 0xdc9cff, 0xff9cff, 0xff94d3],
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def hex_to_rgb(color):
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r = color >> 16
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g = (color >> 8) % 256
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b = color % 256
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return (r,g,b)
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def rgb_to_hex(rgb):
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(r,g,b) = rgb
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return (r << 16) + (g << 8) + b
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def color_distance_squared(c1, c2):
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dr = c1[0] - c2[0]
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dg = c1[1] - c2[1]
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db = c1[2] - c2[2]
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return dr * dr + dg * dg + db * db
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class AnsiPixel:
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def __init__(self, pixel_u32):
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self.RGB99 = [
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0xffffff, 0x000000, 0x00007f, 0x009300, 0xff0000, 0x7f0000, 0x9c009c, 0xfc7f00,
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'RGB99': [0xffffff, 0x000000, 0x00007f, 0x009300, 0xff0000, 0x7f0000, 0x9c009c, 0xfc7f00,
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0xffff00, 0x00fc00, 0x009393, 0x00ffff, 0x0000fc, 0xff00ff, 0x7f7f7f, 0xd2d2d2,
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0x470000, 0x472100, 0x474700, 0x324700, 0x004700, 0x00472c, 0x004747, 0x002747,
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0x000047, 0x2e0047, 0x470047, 0x47002a, 0x740000, 0x743a00, 0x747400, 0x517400,
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@ -83,9 +43,86 @@ class AnsiPixel:
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0x5959ff, 0xc459ff, 0xff66ff, 0xff59bc, 0xff9c9c, 0xffd39c, 0xffff9c, 0xe2ff9c,
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0x9cff9c, 0x9cffdb, 0x9cffff, 0x9cd3ff, 0x9c9cff, 0xdc9cff, 0xff9cff, 0xff94d3,
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0x000000, 0x131313, 0x282828, 0x363636, 0x4d4d4d, 0x656565, 0x818181, 0x9f9f9f,
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0xbcbcbc, 0xe2e2e2, 0xffffff
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]
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self.irc = self.nearest_hex_color(pixel_u32, self.RGB99)
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0xbcbcbc, 0xe2e2e2, 0xffffff]
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}
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def convert(data, max_line_len, img_width=80, palette='RGB99', enhance=False, effect=None):
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if palette not in palettes:
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raise Exception('invalid palette option')
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palette = palettes[palette]
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image = Image.open(io.BytesIO(data))
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if enhance:
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image = ImageEnhance.Contrast(image)
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if effect == 'grey':
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image = image.convert("L")
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elif effect == 'black':
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image = image.convert("1")
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del data
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return convert_image(image, max_line_len, img_width, palette)
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def convert_image(image, max_line_len, img_width, palette):
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(width, height) = image.size
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img_height = img_width / width * height
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del height, width
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image.thumbnail((img_width, img_height), Image.Resampling.LANCZOS)
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del img_height
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CHAR = '\u2580'
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buf = list()
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for i in range(0, image.size[1], 2):
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if i+1 >= image.size[1]:
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bitmap = [[rgb_to_hex(image.getpixel((x, i))) for x in range(image.size[0])]]
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bitmap += [[0 for _ in range(image.size[0])]]
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else:
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bitmap = [[rgb_to_hex(image.getpixel((x, y))) for x in range(image.size[0])] for y in [i, i+1]]
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top_row = [AnsiPixel(px, palette) for px in bitmap[0]]
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bottom_row = [AnsiPixel(px, palette) for px in bitmap[1]]
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buf += [""]
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last_fg = last_bg = -1
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ansi_row = list()
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for j in range(image.size[0]):
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top_pixel = top_row[j]
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bottom_pixel = bottom_row[j]
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pixel_pair = AnsiPixelPair(top_pixel, bottom_pixel)
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fg = pixel_pair.top.irc
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bg = pixel_pair.bottom.irc
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if j != 0:
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if fg == last_fg and bg == last_bg:
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buf[-1] += CHAR
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elif bg == last_bg:
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buf[-1] += f'\x03{fg}{CHAR}'
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else:
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buf[-1] += f'\x03{fg},{bg}{CHAR}'
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else:
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buf[-1] += f'\x03{fg},{bg}{CHAR}'
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last_fg = fg
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last_bg = bg
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if len(buf[-1].encode('utf-8', 'ignore')) > max_line_len:
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if img_width - 5 < 10:
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raise Exception('internal error')
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return convert_image(image, max_line_len, img_width-5, palette)
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return buf
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def hex_to_rgb(color):
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r = color >> 16
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g = (color >> 8) % 256
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b = color % 256
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return (r,g,b)
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def rgb_to_hex(rgb):
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r = rgb[0]
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g = rgb[1]
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b = rgb[2]
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return (r << 16) + (g << 8) + b
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def color_distance_squared(c1, c2):
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dr = c1[0] - c2[0]
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dg = c1[1] - c2[1]
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db = c1[2] - c2[2]
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return dr * dr + dg * dg + db * db
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class AnsiPixel:
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def __init__(self, pixel_u32, palette):
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self.irc = self.nearest_hex_color(pixel_u32, palette)
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def nearest_hex_color(self, pixel_u32, hex_colors):
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rgb_colors = [hex_to_rgb(color) for color in hex_colors]
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@ -97,23 +134,3 @@ class AnsiPixelPair:
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def __init__(self, top, bottom):
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self.top = top
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self.bottom = bottom
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class AnsiImage:
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def __init__(self, image):
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self.bitmap = [[rgb_to_hex(image.getpixel((x, y))) for x in range(image.size[0])] for y in range(image.size[1])]
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if len(self.bitmap) % 2 != 0:
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self.bitmap.append([0 for x in range(image.size[0])])
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ansi_bitmap = [[AnsiPixel(y) for y in x] for x in self.bitmap]
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ansi_canvas = list()
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for two_rows in range(0, len(ansi_bitmap), 2):
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top_row = ansi_bitmap[two_rows]
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bottom_row = ansi_bitmap[two_rows+1]
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ansi_row = list()
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for i in range(len(self.bitmap[0])):
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top_pixel = top_row[i]
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bottom_pixel = bottom_row[i]
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pixel_pair = AnsiPixelPair(top_pixel, bottom_pixel)
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ansi_row.append(pixel_pair)
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ansi_canvas.append(ansi_row)
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self.image = image
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self.halfblocks = ansi_canvas
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