Command to create hex file:
xxd -i wallpaper.jpeg > wallpaper.h
Example:
extern const unsigned char wallpaper[];
extern const unsigned int wallpaper_len;
Last active
May 3, 2026 21:17
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extract_cpp_hex_image.py
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| #!/usr/bin/env python3 | |
| """Extract a binary image from a C/C++ header or source file containing a hex byte array.""" | |
| import re | |
| import sys | |
| from pathlib import Path | |
| def extract(src: Path, out: Path) -> None: | |
| text = src.read_text() | |
| match = re.search(r'(\w+)\[\]\s*=\s*\{([^}]+)\}', text, re.DOTALL) | |
| if not match: | |
| sys.exit(f"No byte array found in {src}") | |
| hex_values = re.findall(r'0x[0-9a-fA-F]{2}', match.group(2)) | |
| if not hex_values: | |
| sys.exit(f"No hex bytes found in {src}") | |
| data = bytes(int(h, 16) for h in hex_values) | |
| out.write_bytes(data) | |
| print(f"{match.group(1)}: {len(data)} bytes -> {out}") | |
| if __name__ == "__main__": | |
| src, out = Path(sys.argv[1]), Path(sys.argv[2]) | |
| extract(src, out) |
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