mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-11-26 09:28:13 +00:00
120 lines
3.3 KiB
Python
Executable File
120 lines
3.3 KiB
Python
Executable File
#!/usr/bin/env python3
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from PIL import Image
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import sys
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import struct
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import zlib
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from os.path import basename
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def process_rgb(w, h, pix):
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data = bytes()
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for j in range(h):
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for i in range(w):
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r, g, b = pix[i, j]
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c = ((r & 0xF8) << 8) | ((g & 0xFC) << 3) | ((b & 0xF8) >> 3)
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data += struct.pack(">H", c)
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return data
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def process_grayscale(w, h, pix):
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data = bytes()
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for j in range(h):
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for i in range(w // 2):
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l1, l2 = pix[i * 2, j], pix[i * 2 + 1, j]
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c = (l1 & 0xF0) | (l2 >> 4)
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data += struct.pack(">B", c)
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return data
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def process_image(ifn, savefiles=False):
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im = Image.open(ifn)
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w, h = im.size
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print("Opened %s ... %d x %d @ %s" % (ifn, w, h, im.mode))
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if im.mode == "RGB":
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print("Detected RGB mode")
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elif im.mode == "L":
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if w % 2 > 0:
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print("PNG file must have width divisible by 2")
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return 3
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print("Detected GRAYSCALE mode")
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else:
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print("Unknown mode:", im.mode)
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return 4
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pix = im.load()
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bname = basename(ifn[:-4])
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ofn_h = "%s.h" % bname
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ofn_py = "%s.py" % bname
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if im.mode == "RGB":
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ofn = "%s.toif" % bname
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pixeldata = process_rgb(w, h, pix)
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else:
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ofn = "%s.toig" % bname
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pixeldata = process_grayscale(w, h, pix)
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z = zlib.compressobj(level=9, wbits=10)
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zdata = z.compress(pixeldata) + z.flush()
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zdata = zdata[2:-4] # strip header and checksum
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data = b""
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if im.mode == "RGB":
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data += b"TOIf"
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else:
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data += b"TOIg"
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data += struct.pack("<HH", w, h)
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data += struct.pack("<I", len(zdata))
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data += zdata
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if savefiles:
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with open(ofn, "wb") as f:
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f.write(data)
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print("Written %s ... %d bytes" % (ofn, len(data)))
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with open(ofn_py, "wb") as f:
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f.write(("%s = %s\n" % (bname, data)).encode())
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print("Written %s ... %d bytes" % (ofn_py, len(data)))
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with open(ofn_h, "wt") as f:
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f.write("// clang-format off\n")
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f.write("static const uint8_t toi_%s[] = {\n" % bname)
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f.write(" // magic\n")
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if im.mode == "RGB":
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f.write(" 'T', 'O', 'I', 'f',\n")
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else:
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f.write(" 'T', 'O', 'I', 'g',\n")
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f.write(" // width (16-bit), height (16-bit)\n")
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f.write(
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" 0x%02x, 0x%02x, 0x%02x, 0x%02x,\n"
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% (w & 0xFF, w >> 8, h & 0xFF, h >> 8)
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)
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l = len(zdata)
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f.write(" // compressed data length (32-bit)\n")
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f.write(
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" 0x%02x, 0x%02x, 0x%02x, 0x%02x,\n"
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% (l & 0xFF, (l >> 8) & 0xFF, (l >> 16) & 0xFF, l >> 24)
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)
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f.write(" // compressed data\n")
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f.write(" ")
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for b in zdata:
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f.write(" 0x%02x," % b)
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f.write("\n};\n")
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print("Written %s ... done" % ofn_py)
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return data
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def main():
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if len(sys.argv) < 2:
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print("Usage png2toi image.png")
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return 1
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ifn = sys.argv[1]
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if not ifn.endswith(".png"):
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print("Must provide PNG file")
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return 2
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process_image(ifn, savefiles=True)
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main()
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