mirror of
https://github.com/pret/pokegold-spaceworld.git
synced 2026-04-24 23:10:52 -05:00
ab60521b62
This creates a 2bpp file the same size as the ROM. The ROM can be renamed 2bpp and the mask image can be overlaid on the ROM image to show what's disassembled.
46 lines
1.3 KiB
Python
46 lines
1.3 KiB
Python
#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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"""
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Usage: python3 mask.py [pokegold-spaceworld.map] [mask.png]
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Generate a 2BPP visualizing the space used by each bank in the ROM.
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"""
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import sys
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from mapreader import MapReader
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def main():
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mapfile = sys.argv[1] if len(sys.argv) >= 2 else 'pokegold-spaceworld.map'
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filename = sys.argv[2] if len(sys.argv) >= 3 else 'mask.w1024.2bpp'
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num_banks = 0x40
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bank_mask = 0x3FFF
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bank_size = 0x4000 # bytes
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r = MapReader()
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with open(mapfile, 'r', encoding='utf-8') as f:
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l = f.readlines()
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r.read_map_data(l)
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default_bank_data = {'sections': [], 'used': 0, 'slack': bank_size}
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with open(filename, 'wb') as f:
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for bank in range(num_banks):
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hits = bytearray([0x00] * bank_size)
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data = r.bank_data['rom bank'].get(bank, default_bank_data)
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for s in data['sections']:
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if s['beg'] > s['end']:
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continue
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if s['beg'] == 0x0000 and s['end'] > 0xFFFF:
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# https://github.com/gbdev/rgbds/issues/515
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continue
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beg = s['beg'] & bank_mask
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end = s['end'] & bank_mask
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for i in range(beg, end + 1):
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hits[i] = 0xFF
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f.write(hits)
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if __name__ == '__main__':
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main()
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