mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-11-22 15:38:11 +00:00
113 lines
3.1 KiB
Python
Executable File
113 lines
3.1 KiB
Python
Executable File
#!/usr/bin/env python3
|
|
from PIL import Image
|
|
import sys
|
|
import struct
|
|
import zlib
|
|
from os.path import basename
|
|
|
|
|
|
def process_rgb(w, h, pix):
|
|
data = bytes()
|
|
for j in range(h):
|
|
for i in range(w):
|
|
r, g, b = pix[i, j]
|
|
c = ((r & 0xF8) << 8) | ((g & 0xFC) << 3) | ((b & 0xF8) >> 3)
|
|
data += struct.pack('>H', c)
|
|
return data
|
|
|
|
|
|
def process_grayscale(w, h, pix):
|
|
data = bytes()
|
|
for j in range(h):
|
|
for i in range(w // 2):
|
|
l1, l2 = pix[i * 2, j], pix[i * 2 + 1, j]
|
|
c = (l1 & 0xF0) | (l2 >> 4)
|
|
data += struct.pack('>B', c)
|
|
return data
|
|
|
|
|
|
def process_image(ifn, savefiles=False):
|
|
im = Image.open(ifn)
|
|
w, h = im.size
|
|
print('Opened %s ... %d x %d @ %s' % (ifn, w, h, im.mode))
|
|
|
|
if im.mode == 'RGB':
|
|
print('Detected RGB mode')
|
|
elif im.mode == 'L':
|
|
if w % 2 > 0:
|
|
print('PNG file must have width divisible by 2')
|
|
return 3
|
|
print('Detected GRAYSCALE mode')
|
|
else:
|
|
print('Unknown mode:', im.mode)
|
|
return 4
|
|
|
|
pix = im.load()
|
|
|
|
bname = basename(ifn[:-4])
|
|
ofn_h = '%s.h' % bname
|
|
ofn_py = '%s.py' % bname
|
|
|
|
if im.mode == 'RGB':
|
|
ofn = '%s.toif' % bname
|
|
pixeldata = process_rgb(w, h, pix)
|
|
else:
|
|
ofn = '%s.toig' % bname
|
|
pixeldata = process_grayscale(w, h, pix)
|
|
z = zlib.compressobj(level=9, wbits=10)
|
|
zdata = z.compress(pixeldata) + z.flush()
|
|
zdata = zdata[2:-4] # strip header and checksum
|
|
|
|
data = b''
|
|
if im.mode == 'RGB':
|
|
data += b'TOIf'
|
|
else:
|
|
data += b'TOIg'
|
|
data += struct.pack('<HH', w, h)
|
|
data += struct.pack('<I', len(zdata))
|
|
data += zdata
|
|
|
|
if savefiles:
|
|
with open(ofn, 'wb') as f:
|
|
f.write(data)
|
|
print('Written %s ... %d bytes' % (ofn, len(data)))
|
|
with open(ofn_py, 'wb') as f:
|
|
f.write(('%s = %s\n' % (bname, data)).encode())
|
|
print('Written %s ... %d bytes' % (ofn_py, len(data)))
|
|
with open(ofn_h, 'wt') as f:
|
|
f.write('static const uint8_t toi_%s[] = {\n' % bname)
|
|
f.write(' // magic\n')
|
|
if im.mode == 'RGB':
|
|
f.write(" 'T', 'O', 'I', 'f',\n")
|
|
else:
|
|
f.write(" 'T', 'O', 'I', 'g',\n")
|
|
f.write(' // width (16-bit), height (16-bit)\n')
|
|
f.write(' 0x%02x, 0x%02x, 0x%02x, 0x%02x,\n' % (w & 0xFF, w >> 8, h & 0xFF, h >> 8))
|
|
l = len(zdata)
|
|
f.write(' // compressed data length (32-bit)\n')
|
|
f.write(' 0x%02x, 0x%02x, 0x%02x, 0x%02x,\n' % (l & 0xFF, (l >> 8) & 0xFF, (l >> 16) & 0xFF, l >> 24))
|
|
f.write(' // compressed data\n')
|
|
f.write(' ')
|
|
for b in zdata:
|
|
f.write(' 0x%02x,' % b)
|
|
f.write('\n};\n')
|
|
print('Written %s ... done' % ofn_py)
|
|
|
|
return data
|
|
|
|
|
|
def main():
|
|
if len(sys.argv) < 2:
|
|
print('Usage png2toi image.png')
|
|
return 1
|
|
|
|
ifn = sys.argv[1]
|
|
if not ifn.endswith('.png'):
|
|
print('Must provide PNG file')
|
|
return 2
|
|
|
|
process_image(ifn, savefiles=True)
|
|
|
|
|
|
main()
|