Create Clock images with separate masks.

create_clock.py

# -*- coding: utf-8 -*-
from PIL import Image, ImageDraw, ImageFont, ImageOps
import numpy as np
import os

width = 600
halfwidth = width/2
avatarsize = 48
height = 800
background_color = (255, 255, 255, 0)
background  =  Image.new ( "RGBA", (width,height), background_color )
# get a font
fnt = ImageFont.truetype('Orbitron-Black.ttf', 100)
draw  =  ImageDraw.Draw ( background )

for hour in range(24):
    for minute in range(60):
        text_size = draw.textsize("%02d:%02d"%(hour,minute), fnt)
        
        draw.multiline_text((halfwidth - (text_size[0]/2),150), "%02d:%02d"%(hour,minute), font=fnt, fill=(0,0,0,255), align="center")
        print(r"./clock_images/%02d:%02d.png"%(hour,minute))
        red, green, blue, alpha = background.split()
        background.putalpha(255)
        background.save(r"./clock_images/%02d_%02d.png"%(hour,minute), format='png')
        alpha.save(r"./clock_masks/%02d_%02d.png"%(hour,minute), format='png')
        
        gmi_image_path = r"./gmi_clock_images/%02d_%02d.gmi"%(hour,minute)
        gmi_mask_path = r"./gmi_clock_masks/%02d_%02d.gmi"%(hour,minute)
        
        gmi_image_file = open(gmi_image_path, "wb")
        gmi_mask_file = open(gmi_mask_path, "wb")
        gmi_image_array_orig = np.asarray(background)
        gmi_mask_array_orig = np.asarray(alpha)
        
        gmi_image_array = gmi_image_array_orig.reshape(-1,8)
        gmi_image_array = np.fliplr(gmi_image_array)
        gmi_image_array = gmi_image_array * 255
        gmi_image_array = np.packbits(gmi_image_array,None)
        gmi_image_array.tofile(gmi_image_file)
        
        gmi_mask_array = gmi_mask_array_orig.reshape(-1,8)
        gmi_mask_array = np.fliplr(gmi_mask_array)
        gmi_mask_array = gmi_mask_array * 255
        gmi_mask_array = np.packbits(gmi_mask_array,None)
        gmi_mask_array.tofile(gmi_mask_file)
        
        gmi_image_file.close()
        gmi_mask_file.close()
        draw.rectangle((0,0,600,800), background_color)
        background.putalpha(0)