mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-11-14 03:30:02 +00:00
88 lines
2.2 KiB
Python
Executable File
88 lines
2.2 KiB
Python
Executable File
#!/usr/bin/env python3
|
|
from PIL import Image
|
|
import sys
|
|
import struct
|
|
import zlib
|
|
|
|
|
|
def process_rgb(w, h, data):
|
|
pix = bytearray(w * h * 3)
|
|
for i in range(w * h):
|
|
c = (data[i * 2] << 8) + data[i * 2 + 1]
|
|
pix[i * 3 ] = (c & 0xF800) >> 8
|
|
pix[i * 3 + 1] = (c & 0x07C0) >> 3
|
|
pix[i * 3 + 2] = (c & 0x001F) << 3
|
|
return bytes(pix)
|
|
|
|
|
|
def process_grayscale(w, h, data):
|
|
pix = bytearray(w * h)
|
|
for i in range(w * h // 2):
|
|
pix[i * 2 ] = data[i] & 0xF0
|
|
pix[i * 2 + 1] = (data[i] & 0x0F) << 4
|
|
return bytes(pix)
|
|
|
|
|
|
def process_image(ifn):
|
|
|
|
data = open(ifn, 'rb').read()
|
|
|
|
if ifn.endswith('.toif'):
|
|
if data[:4] != b'TOIf':
|
|
print('Unknown TOIF header')
|
|
return 1
|
|
elif ifn.endswith('.toig'):
|
|
if data[:4] != b'TOIg':
|
|
print('Unknown TOIG header')
|
|
return 2
|
|
else:
|
|
print('Unsupported format')
|
|
return 3
|
|
ofn = '%s.png' % ifn[:-5]
|
|
|
|
w, h = struct.unpack('<HH', data[4:8])
|
|
|
|
print('Opened %s ... %d x %d' % (ifn, w, h))
|
|
|
|
l = struct.unpack('<I', data[8:12])[0]
|
|
data = data[12:]
|
|
if len(data) != l:
|
|
print('Compressed data length mismatch (%d vs %d)' % (len(data), l))
|
|
return 4
|
|
data = zlib.decompress(data, -10)
|
|
|
|
|
|
if ifn.endswith('.toif'):
|
|
if len(data) != w * h * 2:
|
|
print('Uncompressed data length mismatch (%d vs %d)' % (len(data), w * h * 2))
|
|
return 5
|
|
pix = process_rgb(w, h, data)
|
|
img = Image.frombuffer('RGB', (w, h), pix, 'raw', 'RGB', 0, 1)
|
|
img.save(ofn)
|
|
print('Written %s ...' % ofn)
|
|
|
|
if ifn.endswith('.toig'):
|
|
if len(data) != w * h // 2:
|
|
print('Uncompressed data length mismatch (%d vs %d)' % (len(data), w * h // 2))
|
|
return 6
|
|
pix = process_grayscale(w, h, data)
|
|
img = Image.frombuffer('L', (w, h), pix, 'raw', 'L', 0, 1)
|
|
img.save(ofn)
|
|
print('Written %s ...' % ofn)
|
|
|
|
|
|
def main():
|
|
if len(sys.argv) < 2:
|
|
print('Usage: toi2png image.toi[fg]')
|
|
return 1
|
|
|
|
ifn = sys.argv[1]
|
|
if not ifn.endswith('.toif') and not ifn.endswith('.toig'):
|
|
print('Must provide TOIF/TOIG file')
|
|
return 2
|
|
|
|
process_image(ifn)
|
|
|
|
|
|
main()
|