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from PIL import Image
import sys
import os
from math import pow, ceil
IMG_HEADER = "uint8_t image[1360] = {"
IMG_END = "};"
#
# ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890.,!@$%^&(){}[]'"?<>:;\/-+=~`_*|
#
byte_array = []
if len(sys.argv) != 3:
print("Incorrect arguments supplied. Usage: python image_2_bytes.py <inputfile> <font/img>.")
quit()
filename = sys.argv[1]
if not os.path.exists(filename):
print("Image file does not exist.")
quit()
img = Image.open(filename)
if sys.argv[2] == "img":
if img.size != (160, 68):
print("Image is of incorrect size, must be 160x68.")
quit()
byte_index = 0
current_byte = 0
for pixel in list(img.getdata()):
if pixel != 0: # if not black, then white
current_byte += int(pow(2, (byte_index)))
byte_index += 1
if byte_index == 8:
byte_array.append(str(current_byte))
current_byte = 0
byte_index = 0
file_string = IMG_HEADER + ",".join(byte_array) + IMG_END
with open("image.txt", "w") as f:
f.write(file_string)
print("Image converted successfully.")
elif sys.argv[2] == "font":
character_width = int(input("Width of each character: "))
character_height = int(input("Height of each character: "))
if img.size[0] % character_width != 0:
print("Image width must be a multiple of the character width.")
quit()
if img.size[1] % character_height != 0:
print("Image height must be a multiple of the character height.")
quit()
bytes_per_char = character_height * ceil(character_width/8)
charstr = input("Input string of characters present in image: ")
font_index = [-1 for _ in range(128)]
spacechar = "-1"
for i, character in enumerate(charstr):
if character == " ":
spacechar = i
font_index[ord(character)] = str(i) # ascii -> glyph index
x_offset = i*character_width % img.size[0]
y_offset = character_height * (i*character_width // img.size[0])
for y in range(character_height):
byte_index = 0
current_byte = 0
for x in range(character_width):
if img.getpixel((x_offset+x, y_offset+y)) != 0:
current_byte += int(pow(2, (byte_index)))
byte_index += 1
if byte_index == 8:
byte_array.append(str(current_byte))
current_byte = 0
byte_index = 0
if byte_index != 0: # character width isn't multiple of 8
byte_array.append(str(current_byte))
if spacechar != "-1":
for i in range(128):
if font_index[i] == -1:
font_index[i] = str(spacechar)
file_string = f"uint8_t char_w = {character_width};\nuint8_t char_h = {character_height};\nuint16_t bytes_per_char = {bytes_per_char};\n"
file_string += f"uint8_t font_bytes[{len(byte_array)}] = " + "{" + ",".join(byte_array) + "};\n"
file_string += "int8_t font_lookup[128] = {" + ",".join(font_index) + "};"
with open("font.h", "w") as f:
f.write(file_string)
print("Image converted successfully.")
else:
print("Invalid operation. Must be either 'img' or 'font'.")
quit()
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