mirror of
https://github.com/sehugg/8bitworkshop.git
synced 2024-11-27 01:51:35 +00:00
61 lines
1.6 KiB
Python
Executable File
61 lines
1.6 KiB
Python
Executable File
#!/usr/bin/python
|
|
|
|
import sys, struct
|
|
|
|
# playfield bytes, one array for each of 6 columns
|
|
output = [[],[],[],[],[],[]]
|
|
|
|
# reverse byte
|
|
def rev(n):
|
|
return int('{:08b}'.format(n)[::-1], 2)
|
|
|
|
# output bits in given range
|
|
def out(i, pix, lb, hb, reverse=0, shift=0):
|
|
x = (pix >> lb) & ((1<<(hb-lb))-1)
|
|
if reverse:
|
|
x = rev(x)
|
|
if shift:
|
|
x = x << shift
|
|
assert(x>=0 and x<=255)
|
|
output[i].append(x)
|
|
|
|
# read PBM (binary P4 format) file
|
|
with open(sys.argv[1],'rb') as f:
|
|
# read PBM header
|
|
header = f.readline().strip()
|
|
assert(header == b'P4')
|
|
dims = f.readline().strip()
|
|
if dims[0:1] == b'#':
|
|
dims = f.readline().strip()
|
|
print(dims)
|
|
width,height = list(map(int, dims.split()))
|
|
assert(width==40)
|
|
# read bitmap rows
|
|
for y in range(0,height):
|
|
row = bytes(f.read(5) + b'\0\0\0') # pad to 8 bytes
|
|
# convert bytes from MSB first to LSB first
|
|
row2 = []
|
|
for i in range(0,8):
|
|
row2.append(rev(row[i]))
|
|
# convert to 64-bit integer
|
|
pix = struct.unpack('<q',bytes(row2))[0]
|
|
# generate playfield bytes
|
|
out(0, pix, 0, 4, 0, 4)
|
|
out(1, pix, 4, 12, 1)
|
|
out(2, pix, 12, 20, 0)
|
|
out(3, pix, 20, 24, 0, 4)
|
|
out(4, pix, 24, 32, 1)
|
|
out(5, pix, 32, 40, 0)
|
|
|
|
# output bitmap tables
|
|
for c in range(0,6):
|
|
print(("PFBitmap%d" % c))
|
|
s = '\thex '
|
|
for i in range(0,height):
|
|
s += '%02x' % output[c][height-i-1]
|
|
if i % 16 == 15:
|
|
print(s)
|
|
s = '\thex '
|
|
if len(s)>5:
|
|
print(s)
|