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"""
Converts glyphs in the current directory to a C header.
Usage: python -m fonttool font_24.h 24
"""
import os
import re
import sys
import subprocess
dst = sys.argv[1]
font_size = sys.argv[2]
header = "FONT_{}_H".format(font_size)
files = [f for f in os.listdir('.') if os.path.isfile(f) and f.endswith(".jpg")]
files.sort()
with open(dst, "w") as o:
o.write("#ifndef {}\n".format(header))
o.write("#define {}\n\n".format(header))
for i, src in enumerate(files):
id = src.split('.')[0]
rv = subprocess.run(
["identify", "-ping", "-format", "%w %h", src],
capture_output=True,
text=True
)
dim = rv.stdout.split(' ')
width = int(dim[0])
height = int(dim[1])
print("Image={}, size={}x{}".format(src, width, height))
if i == 0:
o.write("int font_{0}_height = {1};\n\n".format(font_size, height))
subprocess.run(["convert", src, "-threshold", "80%", "mon.jpg"])
subprocess.run(["convert", "mon.jpg", "-depth", "1", "-format", "'txt'", "mon.txt"])
n = 7
x = 0
column_len = 0
byte_count = 0
res = width * height
image_size = (res // 8) + (res % 8 > 0)
o.write("int {0}_width = {1};\n\n".format(id, width))
o.write("unsigned char {0}_bmp[{1}] = {{\n\t".format(id, image_size))
with open("mon.txt", "r") as fd:
fd.readline()
for line in fd:
px = re.search("\([^\)]+\)", line).group()
if px == "(0)":
x |= (1 << n)
n -= 1
if n < 0:
o.write("0x{:02X}, ".format(x))
column_len += 1
byte_count += 1
if column_len >= 12:
o.write("\n\t")
column_len = 0
x = 0
n = 7
if res % 8 != 0:
o.write("0x{:02X}, ".format(x))
byte_count += 1
o.write("\n};\n\n")
if (image_size != byte_count):
raise Exception("Detected image size {} and bytes written {} not equal".format(image_size, byte_count))
o.write("#endif")
os.remove("mon.jpg")
os.remove("mon.txt")
print("Wrote {} bytes of image data to {}".format(byte_count, dst))
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