pre-render.py

#### note: I wouldn't recommend using the python library of libchafa, at least, at the time of authoriship,
### it segfaulted every ~100 calls. I would suggest to use subprocess.Popen family of calls to the 'chafa'
### CLI utility, instead.


# TODO: calibration of FONT_RATIO:
import os
# ".. make a perfect circle ..."
import blessed 
from chafa import *
from chafa.loader import Loader

# The font ratio of JetBrains Mono (width/height)

# measured from a widescreen desktop
FONT_RATIO = 119/425

# Create a canvas config
config = CanvasConfig()

import glob
files = sorted(glob.glob('fire/*.jpg'))

for width in range(10, 400, 10):

    # Configure the canvas geometry
    config.width  = width
    config.height = width * FONT_RATIO
    canvas = Canvas(config)
    print((config.width, config.height))

    # Load the snake
    config.calc_canvas_geometry(1712, 1310, FONT_RATIO)
    os.makedirs(f'fire/{width}', exist_ok=True)
    for n, filename in enumerate(files):
        fname=f'fire/{width}/frame-{n:04x}.ans'
        if not os.path.exists(fname):
            image = Loader(filename)
            print(image, fname)
            # Draw to the canvs
            canvas.draw_all_pixels(
               image.pixel_type, image.get_pixels(),
               1712, 1310, 6848)
            open(fname, 'w').write(canvas.print().decode())
            for tmpfile in glob.glob('/tmp/magick-*'):
                print('-', tmpfile)
                os.unlink(tmpfile)

t = blessed.Terminal()

import time
with t.hidden_cursor():
    while True:
        for o in outputs:
            print(t.home, end='', flush=False)
            time.sleep(0.1)
            print(o, end='', flush=True)