137 lines
4.2 KiB
Python
Executable File
137 lines
4.2 KiB
Python
Executable File
#!/usr/bin/env python3
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"""
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Converts images into a format suitable for display on Badger 2040.
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Optionally resizes images to 296x128 to fit the display.
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Crunches images down to dithered, 1bit colour depth.
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Outputs either in raw binary format or as a .py file for embedding into MicroPython.
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Output to py functionality is borrwed from data_to_py.py, Copyright (c) 2016 Peter Hinch
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"""
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import io
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import argparse
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from PIL import Image, ImageEnhance
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from pathlib import Path
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PY_HEADER = """# Code generated by convert.py.
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"""
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PY_FOOTER = """_mvdata = memoryview(_data)
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def data():
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return _mvdata
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"""
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parser = argparse.ArgumentParser(description='Converts images into the format used by Badger2040.')
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parser.add_argument('file', nargs="+", help='input files to convert')
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parser.add_argument('--out_dir', type=Path, default=None, help='output directory')
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parser.add_argument('--binary', action="store_true", help='output binary file for MicroPython')
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parser.add_argument('--py', action="store_true", help='output .py file for MicroPython embedding')
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parser.add_argument('--resize', action="store_true", help='force images to 296x128 pixels')
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options = parser.parse_args()
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class ByteWriter(object):
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bytes_per_line = 16
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def __init__(self, stream, varname):
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self.stream = stream
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self.stream.write('{} =\\\n'.format(varname))
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self.bytecount = 0 # For line breaks
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def _eol(self):
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self.stream.write("'\\\n")
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def _eot(self):
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self.stream.write("'\n")
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def _bol(self):
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self.stream.write("b'")
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# Output a single byte
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def obyte(self, data):
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if not self.bytecount:
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self._bol()
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self.stream.write('\\x{:02x}'.format(data))
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self.bytecount += 1
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self.bytecount %= self.bytes_per_line
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if not self.bytecount:
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self._eol()
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# Output from a sequence
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def odata(self, bytelist):
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for byt in bytelist:
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self.obyte(byt)
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# ensure a correct final line
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def eot(self): # User force EOL if one hasn't occurred
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if self.bytecount:
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self._eot()
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self.stream.write('\n')
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def convert_image(img):
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if options.resize:
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img = img.resize((296, 128)) # resize
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try:
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enhancer = ImageEnhance.Contrast(img)
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img = enhancer.enhance(2.0)
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except ValueError:
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pass
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img = img.convert("1") # convert to black and white
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return img
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def write_stream(header, footer, ip_stream, op_stream):
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op_stream.write(header)
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op_stream.write('\n')
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data = ip_stream.read()
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bw_data = ByteWriter(op_stream, '_data')
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bw_data.odata(data)
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bw_data.eot()
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op_stream.write(footer)
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# create map of images based on input filenames
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for input_filename in options.file:
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with Image.open(input_filename) as img:
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img = convert_image(img)
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image_name = Path(input_filename).stem
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w, h = img.size
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output_data = [~b & 0xff for b in list(img.tobytes())]
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if options.binary:
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if options.out_dir is not None:
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output_filename = (options.out_dir / image_name).with_suffix(".bin")
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else:
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output_filename = Path(input_filename).with_suffix(".bin")
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print(f"Saving to {output_filename}, {w}x{h}")
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with open(output_filename, "wb") as out:
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out.write(bytearray(output_data))
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elif options.py:
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if options.out_dir is not None:
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output_filename = (options.out_dir / image_name).with_suffix(".py")
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else:
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output_filename = Path(input_filename).with_suffix(".py")
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print(f"Saving to {output_filename}, {w}x{h}")
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with open(output_filename, "w") as out:
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write_stream(PY_HEADER, PY_FOOTER, io.BytesIO(bytes(output_data)), out)
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else:
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image_code = '''\
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static const uint8_t {image_name}[{count}] = {{
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{byte_data}
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}};
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'''.format(image_name=image_name, count=len(output_data), byte_data=", ".join(str(b) for b in output_data))
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print(image_code)
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