# halfblock.py -rw-r--r-- 995 bytes View raw
                                                                                
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#!/usr/bin/env python3
import sys
from PIL import Image
from urllib import request


def half_block_image(url, width, height):
    return "".join(generate_half_block_image(url, width, height))


def generate_half_block_image(url, width, height):
    image = load_image(url)
    image.thumbnail((width, height))
    px = image.load()

    for row in range(image.height // 2):
        y1 = row * 2
        y2 = row * 2 + 1

        for x in range(image.width):
            yield half_block_char(px[x, y1], px[x, y2])
        yield "\n"
    yield "\033[0m"


def load_image(url):
    with request.urlopen(url) as f:
        return Image.open(f)


def half_block_char(top_color, bottom_color):
    bg = f"\033[48;2;{ansi_color(top_color)}m"
    fg = f"\033[38;2;{ansi_color(bottom_color)}m"
    return f"{fg}{bg}\N{lower half block}"


def ansi_color(color):
    r, b, g = color
    return f"{r};{b};{g}"


if __name__ == "__main__":
    url = sys.argv[1]
    print(half_block_image(url, 100, 100))