mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-11-22 15:38:11 +00:00
93 lines
2.4 KiB
Python
Executable File
93 lines
2.4 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 + 0] = (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 + 0] = data[i] & 0xF0
|
|
pix[i * 2 + 1] = (data[i] & 0x0F) << 4
|
|
return bytes(pix)
|
|
|
|
|
|
def process_image(ifn, ofn):
|
|
|
|
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
|
|
if ofn is None:
|
|
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] [output]")
|
|
return 1
|
|
|
|
ifn = sys.argv[1]
|
|
if not ifn.endswith(".toif") and not ifn.endswith(".toig"):
|
|
print("Must provide TOIF/TOIG file")
|
|
return 2
|
|
|
|
ofn = sys.argv[2] if len(sys.argv) > 2 else None
|
|
process_image(ifn, ofn)
|
|
|
|
|
|
main()
|