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teamchong
437afa4dfe
- Move Python proxy + scripts to legacy/python/ (parity oracle during port) - Delete Rust port (src/rust/) - history preserved in commits482c967,f094649- Delete Zig atlas builder (src/zig/) - will regenerate from TTF via Node - Move JetBrainsMono-Regular.ttf to assets/ - Update .gitignore for Node/TS/Wrangler Next: scaffold TypeScript with dual Node + Cloudflare Workers targets.
76 lines
2.3 KiB
Python
76 lines
2.3 KiB
Python
"""Pre-render Menlo 5pt glyph atlas + metrics for Zig consumption.
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Format (binary, little-endian):
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Header (16 bytes):
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magic 4 "MNAT"
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version 2 u16 = 1
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cell_w 2 u16 max glyph width
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cell_h 2 u16 cell height (asc+desc)
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asc 2 u16
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desc 2 u16
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first_char 1 u8 = 32 (space)
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last_char 1 u8 = 126 (~)
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Per-glyph (N glyphs = last-first+1):
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advance_px 2 u16
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-- packed 1-bit bitmap, cell_w*cell_h bits, row-major
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"""
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import struct
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from PIL import Image, ImageDraw, ImageFont
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FONT_PATH = "/System/Library/Fonts/Menlo.ttc"
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FONT_SIZE = 5
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FIRST = 32 # space
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LAST = 126 # ~
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font = ImageFont.truetype(FONT_PATH, FONT_SIZE)
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asc, desc = font.getmetrics()
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cell_h = asc + desc
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# Find max glyph width across our range
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max_w = 0
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for code in range(FIRST, LAST + 1):
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ch = chr(code)
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w = int(font.getlength(ch)) + 1
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if w > max_w:
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max_w = w
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cell_w = max_w
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print(f"Atlas: cell={cell_w}x{cell_h}, asc={asc}, desc={desc}, chars={LAST-FIRST+1}")
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with open("/tmp/menlo5_atlas.bin", "wb") as f:
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# Header
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f.write(b"MNAT")
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f.write(struct.pack("<H", 1)) # version
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f.write(struct.pack("<H", cell_w))
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f.write(struct.pack("<H", cell_h))
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f.write(struct.pack("<H", asc))
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f.write(struct.pack("<H", desc))
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f.write(struct.pack("<B", FIRST))
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f.write(struct.pack("<B", LAST))
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# Glyphs
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for code in range(FIRST, LAST + 1):
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ch = chr(code)
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advance = int(font.getlength(ch))
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img = Image.new("L", (cell_w, cell_h), 255)
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d = ImageDraw.Draw(img)
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d.text((0, -desc // 2), ch, fill=0, font=font)
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# Threshold to 1-bit (anti-aliased pixels -> any non-white -> black)
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pix = img.load()
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f.write(struct.pack("<H", advance))
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# Pack row-major bits: bit=1 means BLACK (ink)
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bits = []
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for y in range(cell_h):
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for x in range(cell_w):
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bits.append(1 if pix[x, y] < 200 else 0)
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# Pack 8 bits per byte
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for i in range(0, len(bits), 8):
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byte = 0
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for j in range(8):
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if i + j < len(bits) and bits[i + j]:
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byte |= 1 << (7 - j)
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f.write(struct.pack("<B", byte))
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import os
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print(f"Atlas size: {os.path.getsize('/tmp/menlo5_atlas.bin')} bytes")
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