121 lines
3.4 KiB
Python
121 lines
3.4 KiB
Python
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#!/usr/bin/env python3
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import argparse
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import sys
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from pathlib import Path
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from typing import Optional
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try:
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from PIL import Image
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except ImportError:
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print(
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"Error: Pillow is not installed. Install it with 'pip install Pillow' or use the project venv.",
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file=sys.stderr,
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)
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sys.exit(1)
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def to_bw_char(value: int, threshold: int, invert: bool) -> str:
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is_black = value < threshold
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if invert:
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is_black = not is_black
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return 'B' if is_black else 'W'
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def convert_image(
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input_path: Path,
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output_path: Path,
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width: Optional[int],
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height: Optional[int],
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threshold: int,
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invert: bool,
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) -> None:
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# Load image
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img = Image.open(input_path)
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# Convert to grayscale (luminance)
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img = img.convert('L')
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# Resize if requested
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if width is not None or height is not None:
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# Preserve aspect ratio if only one dimension is provided
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if width is not None and height is not None:
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target_size = (width, height)
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else:
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w, h = img.size
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if width is not None and height is None:
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height = round(h * (width / w))
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elif height is not None and width is None:
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width = round(w * (height / h))
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target_size = (width, height)
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img = img.resize(target_size, resample=Image.NEAREST)
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pixels = img.load()
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w, h = img.size
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lines = []
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for y in range(h):
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row_chars = []
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for x in range(w):
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row_chars.append(to_bw_char(pixels[x, y], threshold, invert))
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lines.append(''.join(row_chars))
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output_path.parent.mkdir(parents=True, exist_ok=True)
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output_path.write_text('\n'.join(lines), encoding='utf-8')
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def parse_args() -> argparse.Namespace:
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p = argparse.ArgumentParser(
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description="Convert an image to bad_apple_frame.txt format (W=white, B=black)."
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)
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# Input aliases: --input/-i and --image
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p.add_argument(
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'--input', '-i', dest='input', type=Path, required=False,
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help='Path to input image (PNG, JPG, GIF, etc.)'
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)
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p.add_argument(
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'--image', dest='input', type=Path, required=False,
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help='Alias for --input'
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)
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# Output aliases: --output/-o and --out
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p.add_argument(
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'--output', '-o', dest='output', type=Path, required=False,
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help='Path to output text file (defaults to <image>_frame.txt)'
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)
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p.add_argument(
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'--out', dest='output', type=Path, required=False,
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help='Alias for --output'
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)
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p.add_argument('--width', type=int, help='Optional output width in pixels')
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p.add_argument('--height', type=int,
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help='Optional output height in pixels')
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p.add_argument(
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'--threshold', type=int, default=128,
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help='Grayscale threshold 0..255 (default: 128)'
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)
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p.add_argument('--invert', action='store_true',
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help='Invert mapping (B/W flipped)')
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args = p.parse_args()
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if args.input is None:
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p.error("--input/--image is required")
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if args.output is None:
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args.output = args.input.with_name(f"{args.input.stem}_frame.txt")
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return args
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def main() -> None:
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args = parse_args()
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convert_image(
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input_path=args.input,
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output_path=args.output,
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width=args.width,
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height=args.height,
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threshold=max(0, min(255, args.threshold)),
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invert=args.invert,
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)
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if __name__ == '__main__':
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main()
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