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https://github.com/trezor/trezor-firmware.git
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core: use common implementation for toif_convert
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matejcik
matejcik
parent
67b2ba558b
commit
61e4f79c90
@ -1,153 +1,35 @@
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#!/usr/bin/env python3
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import io
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import struct
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import sys
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import zlib
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from os.path import basename
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import click
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from PIL import Image
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from trezorlib._internal import toif
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def png2toif(input_data):
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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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im = Image.open(io.BytesIO(input_data))
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w, h = im.size
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if im.mode not in ["RGB", "L"]:
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raise ValueError("Unknown mode:", im.mode)
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if im.mode == "L":
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if w % 2 > 0:
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raise ValueError("PNG file must have width divisible by 2")
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pix = im.load()
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if im.mode == "RGB":
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pixeldata = process_rgb(w, h, pix)
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else:
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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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return data
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@click.command()
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@click.argument("infile", type=click.File("rb"))
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@click.argument("outfile", type=click.File("wb"))
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def toif_convert(infile, outfile):
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"""Convert any image format to/from TOIF or vice-versa.
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\b
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Examples:
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toif_convert.py somefile.jpg outfile.toif
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toif_convert.py infile.toif outfile.png
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"""
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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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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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if infile.name.endswith(".toif") or infile.name == "-":
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toi = toif.from_bytes(infile.read())
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im = toi.to_image()
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im.save(outfile)
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elif outfile.name.endswith(".toif") or outfile.name == "-":
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im = Image.open(infile)
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toi = toif.from_image(im)
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outfile.write(toi.to_bytes())
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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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"""
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def toif2png(data):
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def process_rgb(w, h, data):
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pix = bytearray(w * h * 3)
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for i in range(w * h):
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c = (data[i * 2] << 8) + data[i * 2 + 1]
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pix[i * 3 + 0] = (c & 0xF800) >> 8
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pix[i * 3 + 1] = (c & 0x07C0) >> 3
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pix[i * 3 + 2] = (c & 0x001F) << 3
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return bytes(pix)
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def process_grayscale(w, h, data):
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pix = bytearray(w * h)
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for i in range(w * h // 2):
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pix[i * 2 + 0] = data[i] & 0xF0
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pix[i * 2 + 1] = (data[i] & 0x0F) << 4
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return bytes(pix)
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if data[:4] != b"TOIf" and data[:4] != b"TOIg":
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raise ValueError("Unknown TOIF header")
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format = data[:4].decode().lower()
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w, h = struct.unpack("<HH", data[4:8])
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l = struct.unpack("<I", data[8:12])[0]
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data = data[12:]
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if len(data) != l:
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raise ValueError("Compressed data length mismatch (%d vs %d)" % (len(data), l))
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data = zlib.decompress(data, -10)
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if format == "toif":
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if len(data) != w * h * 2:
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raise ValueError(
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"Uncompressed data length mismatch (%d vs %d)" % (len(data), w * h * 2)
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)
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pix = process_rgb(w, h, data)
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img = Image.frombuffer("RGB", (w, h), pix, "raw", "RGB", 0, 1)
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ret = io.BytesIO()
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img.save(ret, format="PNG")
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return ret.getvalue()
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if format == "toig":
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if len(data) != w * h // 2:
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raise ValueError(
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"Uncompressed data length mismatch (%d vs %d)" % (len(data), w * h // 2)
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)
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pix = process_grayscale(w, h, data)
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img = Image.frombuffer("L", (w, h), pix, "raw", "L", 0, 1)
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ret = io.BytesIO()
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img.save(ret, format="PNG")
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return ret.getvalue()
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def main():
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if len(sys.argv) < 2:
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print("Usage: toi_convert [input.png|input.toif] [output.toif|output.png]")
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return 1
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ifn, ofn = sys.argv[1], sys.argv[2]
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if ifn.endswith(".png") and ofn.endswith(".toif"):
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open(ofn, "wb").write(png2toif(open(ifn, "rb").read()))
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elif ifn.endswith(".toif") and ofn.endswith(".png"):
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open(ofn, "wb").write(toif2png(open(ifn, "rb").read()))
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else:
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print("Must provide a valid combination of PNG/TOIF or TOIF/PNG files")
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return 2
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raise click.ClickException("At least one of the arguments must end with .toif")
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if __name__ == "__main__":
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main()
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toif_convert()
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