mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-12-24 15:28:10 +00:00
94 lines
2.4 KiB
Python
Executable File
94 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, 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):
|
|
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()
|
|
|
|
if im.mode == 'RGB':
|
|
ofn = '%s.toif' % ifn[:-4]
|
|
pixeldata = process_rgb(w, h, pix)
|
|
else:
|
|
ofn = '%s.toig' % ifn[:-4]
|
|
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
|
|
|
|
with open(ofn, 'wb') as f:
|
|
if im.mode == 'RGB':
|
|
f.write(b'TOIf')
|
|
else:
|
|
f.write(b'TOIg')
|
|
f.write(struct.pack('<HH', w, h))
|
|
f.write(struct.pack('<I', len(zdata)))
|
|
f.write(zdata)
|
|
print('Written %s ... %d bytes' % (ofn, 4 + 4 + len(zdata)))
|
|
with open(ofn + '.h', 'wt') as f:
|
|
f.write('static const uint8_t toi_%s[] = {\n' % ifn[:-4])
|
|
if im.mode == 'RGB':
|
|
f.write(" 'T', 'O', 'I', 'f',\n")
|
|
else:
|
|
f.write(" 'T', 'O', 'I', 'g',\n")
|
|
f.write(' (uint16_t)%d, (uint16_t)%d,\n' % (w, h))
|
|
f.write(' (uint32_t)%d,\n' % len(zdata))
|
|
f.write(' ')
|
|
for b in zdata:
|
|
f.write(' 0x%02x,' % b)
|
|
f.write('\n};\n')
|
|
print('Written %s ...' % (ofn + '.h'))
|
|
|
|
|
|
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)
|
|
|
|
|
|
main()
|