Package

generator/theme.py

@@ -0,0 +1,38 @@
+"""The product palette shared by build-time rasterization and both devices."""
+
+from __future__ import annotations
+
+import argparse
+import json
+import pathlib
+import re
+
+PALETTE_PATH = pathlib.Path(__file__).with_name('palette.json')
+COLORS = json.loads(PALETTE_PATH.read_text(encoding='utf-8'))
+
+def rgb(name: str) -> tuple[int, int, int]:
+  value = COLORS[name]
+  if not isinstance(value, str) or not re.fullmatch(r'#[0-9a-fA-F]{6}', value):
+    raise ValueError(f'invalid palette color: {name}')
+  return tuple(int(value[index:index + 2], 16) for index in (1, 3, 5))
+
+def generate_header(destination: pathlib.Path) -> None:
+  lines = ['#pragma once', '', 'namespace vamp_style {', '']
+  for name in COLORS:
+    if not re.fullmatch(r'[a-z][a-z_]*', name):
+      raise ValueError(f'invalid palette name: {name}')
+    r, g, b = rgb(name)
+    lines.append(f'constexpr auto {name} = vamp_style::color{{{r}, {g}, {b}, 255}};')
+  lines.extend(['', '}', ''])
+  content = '\n'.join(lines)
+  destination.parent.mkdir(parents=True, exist_ok=True)
+  if not destination.exists() or destination.read_text() != content:
+    destination.write_text(content, encoding='utf-8')
+
+def main() -> None:
+  parser = argparse.ArgumentParser(description=__doc__)
+  parser.add_argument('--header', required=True, type=pathlib.Path)
+  generate_header(parser.parse_args().header)
+
+if __name__ == '__main__':
+  main()