mgba/tools/make-dotcode.py

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4.8 KiB
Python
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2020-02-20 07:59:41 +00:00
import numpy as np
import PIL.Image
import PIL.ImageChops
import sys
blocksize = 104
pow = [0] * 256
rev = [0] * 256
rev[0] = 0xFF
x = 1
for i in range(0xFF):
pow[i]=x
rev[x]=i
x *= 2
if x >= 0x100:
x ^= 0x187
gg = [0] * 16
gg[0] = pow[0x78]
for i in range(16):
gg[i] = 1
for j in range(i + 1):
j = i - j
if j == 0:
y = 0
else:
y = gg[j - 1]
x = gg[j]
if x != 0:
x = rev[x] + 0x78 + i
if x >= 0xFF:
x -= 0xFF
y ^= pow[x]
gg[j] = y
for i in range(16):
gg[i] = rev[gg[i]]
print(*[hex(x) for x in gg])
def interleave(data, header):
data = data.reshape([-1, 48]).T
new_data = np.zeros((64, data.shape[1]), dtype=data.dtype)
for i, row in enumerate(data.T):
new_data[:,i] = rs(row)
data = new_data.reshape([-1])
new_data = np.zeros(data.shape[0] + (102 - data.shape[0] % 102), dtype=data.dtype)
new_data[:data.shape[0]] = data
new_data = new_data.reshape([-1, 102])
data = new_data
new_data = np.zeros((data.shape[0], 104), dtype=data.dtype)
new_data[:,2:] = data
for i in range(new_data.shape[0]):
x = (i * 2) % len(header)
new_data[i,:2] = header[x:x + 2]
data = new_data.reshape([-1])
return data
def rs(data):
new_data = np.zeros(data.shape[0] + 16, dtype=data.dtype)
new_data[:data.shape[0]] = data
new_data = np.flipud(new_data)
for i in range(data.shape[0]):
i = new_data.shape[0] - i - 1
z = rev[new_data[i] ^ new_data[15]]
for j in range(16):
j = 15 - j
if j == 0:
x = 0
else:
x = new_data[j - 1]
if z != 0xFF:
y = gg[j]
if y != 0xFF:
y += z
if y >= 0xFF:
y -= 0xFF
x ^= pow[y]
new_data[j] = x
new_data[:16] = ~new_data[:16]
new_data = np.flipud(new_data)
return new_data
def bin2raw(data):
if len(data) == 1344:
header = np.array([0x00, 0x02, 0x00, 0x01, 0x40, 0x10, 0x00, 0x1C], dtype=np.uint8)
else:
header = np.array([0x00, 0x03, 0x00, 0x19, 0x40, 0x10, 0x00, 0x2C], dtype=np.uint8)
header = rs(header)
new_data = interleave(np.frombuffer(data, np.uint8), header)
return new_data.tobytes()
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with open(sys.argv[1], 'rb') as f:
data = f.read()
size = len(data)
if size in (1344, 2112):
data = bin2raw(data)
size = len(data)
with open('dotcode.raw', 'wb') as f:
f.write(data)
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blocks = size // blocksize
height = 36
width = 35
margin = 2
dots = np.zeros((width * blocks + margin * 2 + 1, height + margin * 2), dtype=np.bool)
anchor = np.array([[0, 1, 1, 1, 0],
[1, 1, 1, 1, 1],
[1, 1, 1, 1, 1],
[1, 1, 1, 1, 1],
[0, 1, 1, 1, 0]], dtype=np.bool)
alignment = np.array([1, 1, 1, 1, 1, 0, 0, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 0, 0], dtype=np.bool)
nybbles = [[0, 0, 0, 0, 0], [0, 0, 0, 0, 1], [0, 0, 0, 1, 0], [1, 0, 0, 1, 0],
[0, 0, 1, 0, 0], [0, 0, 1, 0, 1], [0, 0, 1, 1, 0], [1, 0, 1, 1, 0],
[0, 1, 0, 0, 0], [0, 1, 0, 0, 1], [0, 1, 0, 1, 0], [1, 0, 1, 0, 0],
[0, 1, 1, 0, 0], [0, 1, 1, 0, 1], [1, 0, 0, 0, 1], [1, 0, 0, 0, 0]]
addr = [0x03FF]
for i in range(1, 54):
addr.append(addr[i - 1] ^ ((i & -i) * 0x769))
if (i & 0x07) == 0:
addr[i] ^= 0x769
if (i & 0x0F) == 0:
addr[i] ^= 0x769 << 1
if (i & 0x1F) == 0:
addr[i] ^= (0x769 << 2) ^ 0x769
base = 1 if blocks == 18 else 25
for i in range(blocks + 1):
dots[i * width:i * width + 5, 0:5] = anchor
dots[i * width:i * width + 5, height + margin * 2 - 5:height + margin * 2] = anchor
dots[i * width + margin, margin + 5] = 1
a = addr[base + i]
for j in range(16):
dots[i * width + margin, margin + 14 + j] = a & (1 << (15 - j))
for i in range(blocks):
dots[i * width:(i + 1) * width, margin] = alignment
dots[i * width:(i + 1) * width, height + margin - 1] = alignment
block = []
for byte in data[i * blocksize:(i + 1) * blocksize]:
block.extend(nybbles[byte >> 4])
block.extend(nybbles[byte & 0xF])
j = 0
for y in range(3):
dots[i * width + margin + 5:i * width + margin + 31, margin + 2 + y] = block[j:j + 26]
j += 26
for y in range(26):
dots[i * width + margin + 1:i * width + margin + 35, margin + 5 + y] = block[j:j + 34]
j += 34
for y in range(3):
dots[i * width + margin + 5:i * width + margin + 31, margin + 31 + y] = block[j:j + 26]
j += 26
im = PIL.Image.fromarray(dots.T)
im = PIL.ImageChops.invert(im)
im.save('dotcode.png')