56 lines
1.9 KiB
Python
56 lines
1.9 KiB
Python
# -*- coding: utf-8 -*-
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"""_test_glyph_ref.py — dbf 字形与 TTF 直接渲染逐字节比对（码点映射 + 数据无损验证）"""
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import struct
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from PIL import Image, ImageFont, ImageDraw
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def load(path):
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data = open(path, "rb").read()
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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 = [struct.unpack_from("<HHII", data, 14 + i * 12) for i in range(count)]
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return data, w, h, 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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m = (lo + hi) // 2
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if idx[m][0] == cp:
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return idx[m]
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if idx[m][0] < cp:
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lo = m + 1
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else:
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hi = m - 1
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return None
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SAMPLES = "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锁屏用户名睡眠退出Deshab 0123"
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for name, size in [("simhei_16.dbf", 16), ("simhei_24.dbf", 24)]:
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data, w, h, idx = load(name)
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font = ImageFont.truetype("simhei.ttf", size)
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ascii_w = size * 3 // 4
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ok = bad = 0
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diffs = []
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for ch in SAMPLES:
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cp = ord(ch)
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e = lookup(idx, cp)
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if not e:
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diffs.append((ch, "MISSING"))
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bad += 1
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continue
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_, gw, off, sz = e
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dbf_glyph = data[off:off + sz]
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ref_w = ascii_w if cp < 128 else size
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img = Image.new("L", (ref_w, h), 0)
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ImageDraw.Draw(img).text((0, 0), ch, font=font, fill=255)
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img = img.resize((ref_w, h), Image.LANCZOS)
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ref = img.tobytes()
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if dbf_glyph == ref and gw == ref_w:
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ok += 1
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else:
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bad += 1
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nd = sum(1 for a, b in zip(dbf_glyph, ref) if a != b)
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diffs.append((hex(cp), "bytes-diff", nd, "/", len(ref)))
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print(name, "exact-match:", ok, "mismatch:", bad)
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for d in diffs[:6]:
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print(" diff:", d)
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