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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Usage: python3 coverage.py [pokegold-spaceworld.map] [coverage.png]
Generate a PNG visualizing the space used by each bank in the ROM.
"""
import sys
from pokemontools import png
from colorsys import hls_to_rgb
from mapreader import MapReader
def main():
mapfile = sys.argv[1] if len(sys.argv) >= 2 else 'pokegold-spaceworld.map'
filename = sys.argv[2] if len(sys.argv) >= 3 else 'coverage.png'
num_banks = 0x40
bank_mask = 0x3FFF
bank_size = 0x4000 # bytes
bpp = 8 # bytes per pixel
height = 256 # pixels
assert bank_size % bpp == 0 and (bank_size // bpp) % height == 0
pixels_per_bank = bank_size // bpp # 2048 pixels
bank_width = pixels_per_bank // height # 8 pixels
width = bank_width * num_banks # 1024 pixels
r = MapReader()
with open(mapfile, 'r', encoding='utf-8') as f:
l = f.readlines()
r.read_map_data(l)
hit_data = []
default_bank_data = {'sections': [], 'used': 0, 'slack': bank_size}
for bank in range(num_banks):
hits = [0] * pixels_per_bank
data = r.bank_data['rom bank'].get(bank, default_bank_data)
for s in data['sections']:
if s['beg'] > s['end']:
continue
if s['beg'] == 0x0000 and s['end'] > 0xFFFF:
# https://github.com/gbdev/rgbds/issues/515
continue
beg = s['beg'] & bank_mask
end = s['end'] & bank_mask
for i in range(beg, end + 1):
hits[i // bpp] += 1
hit_data.append(hits)
pixels = [[(0xFF, 0xFF, 0xFF)] * width for _ in range(height)]
for bank, hits in enumerate(hit_data):
hue = 0 if not bank else 210 if bank % 2 else 270
for i, h in enumerate(hits):
y = i // bank_width
x = i % bank_width + bank * bank_width
hls = (hue / 360.0, 1.0 - (h / bpp * (100 - 15)) / 100.0, 1.0)
rgb = tuple(int(c * 255) for c in hls_to_rgb(*hls))
pixels[y][x] = rgb
png_data = [tuple(c for pixel in row for c in pixel) for row in pixels]
with open(filename, 'wb') as f:
w = png.Writer(width, height)
w.write(f, png_data)
if __name__ == '__main__':
main()
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