90 lines
2.7 KiB
Python
90 lines
2.7 KiB
Python
"""mkfont_check.py — .dbf 字库校验工具
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Usage: python mkfont_check.py <font.dbf> [字符...]
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校验项：
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1. magic "DBF\x10"、bpp、字形尺寸
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2. 索引按 codepoint 升序（dbf_lookup 二分查找前提）
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3. 抽样码点查找（默认：中文测试开始菜单任务管理器设置搜索通知中心
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关机重启睡眠亮暗主题浅深任务栏窗口图标网络音量电源时间日期）
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4. 无字符参数时把「中」渲染为 ASCII art 供肉眼检查
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"""
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import struct
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import sys
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if hasattr(sys.stdout, "reconfigure"):
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sys.stdout.reconfigure(encoding="utf-8", errors="replace")
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DBF_MAGIC = b"DBF\x10"
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DEFAULT_SAMPLE = "中文测试开始菜单任务管理器设置搜索通知中心关机重启睡眠亮暗主题浅深任务栏窗口图标网络音量电源时间日期"
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def load(path):
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with open(path, "rb") as f:
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data = f.read()
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if data[:4] != DBF_MAGIC:
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raise SystemExit(f"BAD MAGIC: {data[:4]!r}")
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count = struct.unpack_from("<I", data, 4)[0]
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w, h, bpp = struct.unpack_from("<HHH", data, 8)
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idx = []
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for i in range(count):
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cp, gw, off, sz = struct.unpack_from("<HHII", data, 14 + i * 12)
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idx.append((cp, gw, off, sz))
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return data, count, w, h, bpp, idx
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def lookup(idx, cp):
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lo, hi = 0, len(idx) - 1
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while lo <= hi:
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mid = (lo + hi) // 2
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if idx[mid][0] == cp:
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return idx[mid]
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if idx[mid][0] < cp:
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lo = mid + 1
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else:
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hi = mid - 1
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return None
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def ascii_art(data, entry, h):
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_, w, off, _sz = entry
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print(f" +{'-' * w}+")
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for y in range(h):
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row = " "
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for x in range(w):
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v = data[off + y * w + x]
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row += "█" if v > 200 else ("▓" if v > 120 else ("░" if v > 50 else " "))
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print(" |" + row + "|")
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print(f" +{'-' * w}+")
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def main():
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if len(sys.argv) < 2:
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print(f"Usage: {sys.argv[0]} <font.dbf> [chars]")
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sys.exit(1)
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path = sys.argv[1]
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data, count, w, h, bpp, idx = load(path)
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print(f"{path}: count={count} glyph={w}x{h} bpp={bpp}")
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# 校验升序
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bad = sum(1 for a, b in zip(idx, idx[1:]) if a[0] >= b[0])
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if bad:
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raise SystemExit(f"INDEX NOT SORTED: {bad} violations")
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print("index sorted: OK")
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sample = sys.argv[2] if len(sys.argv) > 2 else DEFAULT_SAMPLE
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missing = [c for c in sample if lookup(idx, ord(c)) is None]
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if missing:
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print(f"MISSING GLYPHS: {''.join(missing)}")
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sys.exit(1)
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print(f"all {len(sample)} sample glyphs found: OK")
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# 肉眼检查首字符
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first = sample[0]
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ascii_art(data, lookup(idx, ord(first)), h)
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if __name__ == "__main__":
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main()
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