#!python
# -*- mode: python; Encoding: utf-8; coding: utf-8 -*-
# Last updated: <2021/10/02 01:26:57 +0900>
"""
Joint image.

Windows10 x64 21H1 + Python 3.9.5 64bit + Pillow 8.3.2
"""

from PIL import Image, ImageFilter
import glob

inputfiles = "out/*.png"
output = "output.png"
xloop = 8

l = sorted(glob.glob(inputfiles))

w, h = 0, 0
imgs = []
for s in l:
    im = Image.open(s)
    if im.size[0] > w:
        w = im.size[0]
    if im.size[1] > h:
        h = im.size[1]
    imgs.append(im)

yloop = len(l) // xloop
if len(l) % xloop != 0:
    yloop += 1

tw = w * xloop
th = h * yloop
nim = Image.new("RGBA", (tw, th), (0, 0, 0, 0))

xi, yi = 0, 0
idx = 0
while yi < yloop:
    x, y = xi * w, yi * h
    nim.paste(imgs[idx].copy(), (x, y))
    idx += 1
    if idx >= len(l):
        break
    
    xi += 1
    if xi >= xloop:
        xi = 0
        yi += 1

nim.save(output)