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141 lines
5.5 KiB
Python
141 lines
5.5 KiB
Python
#!/usr/bin/env python3
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# gen_ui_font.py — 预渲染 MeowOS UI 位图字库（替代 freetype，零依赖）
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#
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# 输入默认字体（本脚本用设备自带 default.otf，因为 ~/Fonts 属主为 10195 不可读；
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# 如需切换思源黑体/MiSans，改 SRC 路径并把字体拷到可读处，或经 meow.conf font_file= 指定）。
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# 输出 ui_font.dat：自定义二进制位图字库（8-bit alpha 灰度，白字用 alpha，blit 时着色）。
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# 布局（小端）:
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# +0 uint32 magic "UIF1"
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# +4 uint16 px (设计字号，用于行距/参考)
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# +6 uint16 flags (0 = 8-bit alpha 灰度)
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# +8 uint32 n (glyph 数)
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# +12 uint16 atlas_w (位图集宽)
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# +14 uint16 atlas_h
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# +16 16*n entry: uint32 cp; uint16 x,y,w,h,adv
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# +16+16*n bitmap: atlas_w*atlas_h 字节（8-bit alpha）
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#
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# 字符集：ASCII 0x20-0x7E + GB2312 一级汉字(0xB0-0xD7) + 常用 CJK 标点 + UI 显式字符串。
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import struct, sys
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from PIL import Image, ImageDraw, ImageFont
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SRC = "fw_ssh/squashfs-root/usr/resource/fonts/default.otf"
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PX = 24 # 设计像素高（大字，配合 40px 状态栏）
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OUT = sys.argv[1] if len(sys.argv) > 1 else "/tmp/ftg/ui_font.dat"
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# ---- 字符集 ----
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chars = set()
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for c in range(0x20, 0x7F):
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chars.add(chr(c)) # ASCII 可打印
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# GB2312 一级汉字: 0xB0A1(176,161) .. 0xD7F9(215,249)，每行 94
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for row in range(0xB0, 0xD8):
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for col in range(0xA1, 0xFF):
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b = bytes([row, col])
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try:
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ch = b.decode('gb2312')
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except Exception:
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continue
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if ch and not ch.startswith(' '):
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# 去掉 PUA/未定义区
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if ord(ch[0]) >= 0x4E00 or (0xFF00 <= ord(ch[0]) <= 0xFFEF):
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chars.add(ch[0])
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# 常用 CJK 标点 / 全角
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for ch in "，。、！？：；（）《》【】「」『』—…￥％·×÷＝＋－· 〇":
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chars.add(ch)
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# UI 显式中文（电源菜单/状态栏/提示），确保必有
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for ch in "关机重启回到取消电源菜单音量蓝牙电量充电返回播放器需网络设置我你的好中英文数分秒年月日应用没有存储卡请插入后开吃到找到放缺失导航打触摸选择无法启动以确认上下":
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chars.add(ch)
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chars = sorted(chars)
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# 宽字符（CJK）用 PX 高，ASCII 用较小一点以保持基线一致；Pillow 自带 advance
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font = ImageFont.truetype(SRC, PX)
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# ---- 栅格化并打包进 atlas（行优先）----
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# 先用足够大的空白画布测量每个字符 bitmap，再打包
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tmp_img_cache = {}
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maxw = PX * 2
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packed = [] # (char, bbox_img, w, h, adv)
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scale = 1
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# 计算每个字符的 bitmap（grayscale alpha）
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metas = []
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for ch in chars:
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if ch == ' ':
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# 空格无 bitmap，只记 advance
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adv = font.getlength(' ')
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metas.append((ch, None, 0, 0, int(adv)))
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continue
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try:
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bbox = font.getbbox(ch)
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except Exception:
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bbox = None
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if not bbox:
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adv = int(font.getlength(ch))
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metas.append((ch, None, 0, 0, adv))
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continue
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x0, y0, x1, y1 = bbox
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w = max(1, x1 - x0); h = max(1, y1 - y0)
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# 渲染到 grayscale (alpha=灰度)
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im = Image.new('L', (w, h), 0)
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# 用 getmask 更精确；这里直接画到临时图再裁
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mask = font.getmask(ch, mode='L')
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im = Image.frombytes('L', mask.size, bytes(mask))
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# 裁到 bbox 对应的部分
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if 0 <= y0 < im.height and 0 <= x0 < im.width:
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im = im.crop((max(0, x0), max(0, y0), min(im.width, x1), min(im.height, y1)))
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adv = int(font.getlength(ch))
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metas.append((ch, im, im.width, im.height, adv))
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# 打包：放入 atlas（简单行打包，一行放满再换行）
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atlas_w = 512
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atlas_rows = []
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x = 0; y = 0; maxY = 0
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entry_pos = {} # char -> (x,y,w,h,adv)
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# 先按宽高打包
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pos_list = []
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curx = 0; cury = 0; rowh = 0
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entries = []
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for ch, im, w, h, adv in metas:
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if im is None:
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entries.append((ch, 0, 0, 0, 0, adv)); continue
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if curx + w > atlas_w:
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curx = 0; cury += rowh; rowh = 0
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entry_pos[ch] = (curx, cury, w, h)
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entries.append((ch, curx, cury, w, h, adv))
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curx += w + 1
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rowh = max(rowh, h)
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if cury + rowh > 4096:
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raise RuntimeError("atlas too tall")
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atlas_h = cury + rowh
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atlas = bytearray(atlas_w * atlas_h)
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for ch, im, w, h, adv in metas:
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if im is None: continue
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x, y, w, h = entry_pos[ch][0], entry_pos[ch][1], entry_pos[ch][2], entry_pos[ch][3]
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for yy in range(h):
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for xx in range(w):
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v = im.getpixel((xx, yy))
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atlas[(y + yy) * atlas_w + (x + xx)] = v
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# ---- 写文件 ----
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with open(OUT, 'wb') as f:
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f.write(struct.pack('<I', 0x55494631)) # magic "UIF1"
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f.write(struct.pack('<H', PX)) # px
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f.write(struct.pack('<H', 0)) # flags 8-bit alpha
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f.write(struct.pack('<I', len(entries))) # n
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f.write(struct.pack('<H', atlas_w)) # atlas_w
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f.write(struct.pack('<H', atlas_h)) # atlas_h
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for ch, x, y, w, h, adv in entries:
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f.write(struct.pack('<IHHHHH', ord(ch), x, y, w, h, adv))
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f.write(bytes(atlas))
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print(f"chars={len(chars)} entries={len(entries)} atlas={atlas_w}x{atlas_h} out={OUT}")
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import os
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print(f"size={os.path.getsize(OUT)} bytes")
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# 自检：渲染取样图（含中文 + 英文）
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img = Image.new('RGB', (480, 40), (0,0,0))
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d = ImageDraw.Draw(img)
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f = ImageFont.truetype(SRC, PX)
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d.text((4, 4), "关机重启 回到HibyOS 取消 音量蓝牙 12:30:45 100%", font=f, fill=(255,255,255))
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img.save('/tmp/ftg/ui_font_sample.png')
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print("sample saved /tmp/ftg/ui_font_sample.png")
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