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140 lines
3.6 KiB
140 lines
3.6 KiB
import argparse
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import pathlib
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import subprocess
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import sys
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import tempfile
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from typing import NoReturn
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from PIL import Image
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GREEN = (0, 255, 0)
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RED = (255, 0, 0)
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def abort(msg: str) -> NoReturn:
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print(msg, file=sys.stderr)
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sys.exit(1)
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def generate_coll_map(
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in_path: pathlib.Path, width: int, height: int, compress: bool = False
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) -> str:
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png = Image.open(in_path).convert("RGB")
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if png.width % 8 != 0 or png.height % 8 != 0:
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abort(f"file '{in_path}' has invalid dimensions (should be multiple of 8)")
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if png.width // 8 != width or png.height // 8 != height:
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abort(f"file '{in_path}' has different size from map")
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out_bytes = []
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bits = []
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for y in range(png.height // 8):
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for x in range(png.width // 8):
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pixel = png.getpixel((x * 8, y * 8))
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bit = None
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if pixel == RED:
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bit = 0
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elif pixel == GREEN:
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bit = 1
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else:
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abort(f"unsupported pixel in collision map: {pixel}")
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if compress:
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bits.append(bit)
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if len(bits) == 8:
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byte = sum([bit << i for i, bit in enumerate(bits)])
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out_bytes.append(byte)
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bits = []
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else:
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out_bytes.append(bit)
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png.close()
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return format_bytes(out_bytes, width=width)
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def format_bytes(data: bytes, width: int = 16) -> str:
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lines = []
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for line_no in range(0, len(data), width):
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line = data[line_no : line_no + width]
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lines.append(" DB " + ", ".join(["$%02X" % b for b in line]))
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return "\n".join(lines)
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def generate_map(pngfile: str, compress: bool = False) -> None:
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pngpath = pathlib.Path(pngfile).resolve()
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incpath = pngpath.parent / pngpath.name.replace(".png", ".inc")
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spath = pngpath.parent / pngpath.name.replace(".png", ".s")
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png = Image.open(pngpath)
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if png.width % 8 != 0 or png.height % 8 != 0:
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abort(f"file '{pngfile}' has invalid dimensions (should be multiple of 8)")
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width = png.width // 8
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height = png.height // 8
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png.close()
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with tempfile.NamedTemporaryFile() as tilef, tempfile.NamedTemporaryFile() as mapf:
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subprocess.run(
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[
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"rgbgfx",
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"-u",
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"-t",
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tilef.name,
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"-o",
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mapf.name,
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pngfile,
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]
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)
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map_data = format_bytes(tilef.read(), width=width)
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tile_data = format_bytes(mapf.read())
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section = pngpath.name.replace(".png", "")
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collpath = pngpath.parent / pngpath.name.replace(".png", "_coll.png")
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coll_map = generate_coll_map(collpath, width, height, compress=compress)
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with open(incpath, "w") as outf:
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outf.write(
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f"""DEF {section}_WIDTH EQU {width}
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DEF {section}_HEIGHT EQU {height}
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DEF {section}_NUM_TILES EQUS "({section}_TILES_end - {section}_TILES)"
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DEF {section}_MAP_SIZE EQUS "({section}_MAP_end - {section}_MAP)"
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ASSERT {section}_MAP_SIZE == {section}_WIDTH * {section}_HEIGHT
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"""
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)
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with open(spath, "w") as outf:
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outf.write(
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f"""SECTION "MAP - {section}", ROMX
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{section}_MAP::
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{map_data}
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{section}_MAP_end::
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{section}_TILES::
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{tile_data}
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{section}_TILES_end::
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{section}_COLLISION::
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{coll_map}
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{section}_COLLISION_end::
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"""
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)
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def main() -> None:
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parser = argparse.ArgumentParser("generate_map")
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parser.add_argument("-c", "--compress", default=False)
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parser.add_argument("png")
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args = parser.parse_args()
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generate_map(args.png, compress=(not not args.compress))
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if __name__ == "__main__":
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main()
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