mirror of
https://github.com/libretro/mgba.git
synced 2024-11-26 17:50:26 +00:00
155 lines
4.9 KiB
Python
155 lines
4.9 KiB
Python
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]]
|
|
|
|
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()
|
|
|
|
def make_dotcode(data):
|
|
size = len(data)
|
|
|
|
if size in (1344, 2112):
|
|
data = bin2raw(data)
|
|
size = len(data)
|
|
|
|
blocks = size // blocksize
|
|
height = 36
|
|
width = 35
|
|
margin = 2
|
|
|
|
dots = np.zeros((width * blocks + margin * 2 + 1, height + margin * 2), dtype=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=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=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
|
|
return np.pad(dots.T, 2)
|
|
|
|
with open(sys.argv[1], 'rb') as f:
|
|
dots = make_dotcode(f.read())
|
|
|
|
im = PIL.Image.fromarray(dots)
|
|
im = PIL.ImageChops.invert(im)
|
|
im.save('dotcode.bmp')
|