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wofl.py
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wofl.py
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#!/usr/bin/env python
import sys
import subprocess
import multiprocessing
WOFL_VERSION = "1.0"
MIPMAP_NUM = 4
TEXTURE_DIV = 16
PALETTE_SIZE = 256
WAD_HEADER_OFFSET = 12
TEXTURE_HEADER_SIZE = 40
def error_exit(msg):
print(msg.strip())
exit(1)
def int_b(n, l=4):
try:
return n.to_bytes(l, "little")
except BaseException:
error_exit("Overflow exception.")
def run_cmd(cmd, **kwargs):
proc = subprocess.run(cmd, capture_output=True, **kwargs)
if proc.stderr:
error_exit(proc.stderr.decode())
return proc
def image_info(files):
proc = run_cmd(["magick", "identify", "-format", "%w %h\n"] + files)
names, dims = [], []
for line, cur_file in zip(proc.stdout.decode().splitlines(), files):
w, h = [int(i) for i in line.split()]
if w % TEXTURE_DIV or h % TEXTURE_DIV:
error_exit(
cur_file +
" has invalid resolution " +
str(w) +
"x" +
str(h) +
".")
dims.append([w, h])
try:
idx = cur_file.rindex('.')
name = cur_file[:idx]
except BaseException:
name = cur_file
name = bytes(name, encoding="ascii")
name = name[:min(len(name), 15)]
names.append(name)
name_set = set()
for name in names:
if name in name_set:
error_exit("Duplicate texture name '" + name.decode() + "'.")
name_set.add(name)
return names, dims
def texture_file(f, name, dim):
mip_cmd = (["magick", "convert", f, "-depth", "8", "-write", "RGB:-"]
+ ["-resize", "50%", "-write", "RGB:-"] * (MIPMAP_NUM - 2)
+ ["-resize", "50%", "RGB:-"])
rgb_img = run_cmd(mip_cmd).stdout
rgb_size = len(rgb_img) // 3
if rgb_size != sum([dim[0]*dim[1] // 4**i for i in range(MIPMAP_NUM)]):
error_exit("Internal error.")
h_res = dim[0]
while rgb_size % h_res:
h_res //= 2
v_res = rgb_size // h_res
map_img = run_cmd(["magick", "convert", "-size", f"{h_res}x{v_res}",
"-depth", "8", "RGB:-", "-colors", "256", "+dither",
"MAP:-"], input=rgb_img).stdout
num_colors = (len(map_img) - rgb_size) // 3
mip_offset = [TEXTURE_HEADER_SIZE]
for i in range(0, MIPMAP_NUM - 1):
mip_offset.append(mip_offset[-1] + dim[0] * dim[1] // 4**i)
header = name.ljust(16, b'\0') + \
b''.join([int_b(n) for n in dim + mip_offset])
return b''.join([header,
map_img[3 * num_colors:],
int_b(PALETTE_SIZE, l=2),
map_img[: 3 * num_colors].ljust(PALETTE_SIZE * 3, bytes([0xfa])),
b'\0' * 2])
def wad_file(textures):
texture_offset = [WAD_HEADER_OFFSET]
for tex in textures:
texture_offset.append(texture_offset[-1] + len(tex))
header = b"WAD3" + int_b(len(textures)) + int_b(texture_offset[-1])
entries = []
for offset, tex in zip(texture_offset, textures):
entry = [int_b(offset),
2 * int_b(len(tex)),
bytes([0x43]),
3 * b'\0',
tex[: 16]]
entries.append(b''.join(entry))
return b''.join([header] + textures + entries)
def texture_helper(x):
return texture_file(*x)
def main():
if len(sys.argv) < 3:
print("WADs Out For [The] Ladies v" + WOFL_VERSION)
print("Usage: wofl input1 [input2 ...] output")
exit(1)
output_file = sys.argv[-1]
input_files = sys.argv[1: -1]
input_names, input_dims = image_info(input_files)
pool = multiprocessing.Pool()
texture_files = pool.map(
texture_helper, zip(
input_files, input_names, input_dims))
with open(output_file, "wb") as f:
f.write(wad_file(texture_files))
if __name__ == "__main__":
main()