From bfbf4b29f53d005c29c7f215b5b01ba2df6bd370 Mon Sep 17 00:00:00 2001
From: Yixing Lao <yixing.lao@gmail.com>
Date: Fri, 10 Jan 2025 20:45:53 +0800
Subject: [PATCH] refactor(camtools/render.py): add Literal type hint for
 font_type parameter in _TextRenderer to enforce valid font types and improve
 type safety

---
 camtools/render.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/camtools/render.py b/camtools/render.py
index a8960b78..dee3d839 100644
--- a/camtools/render.py
+++ b/camtools/render.py
@@ -2,7 +2,7 @@
 Functions for controlled rendering of 3D geometries to images or depth images.
 """
 
-from typing import List, Tuple, Optional
+from typing import List, Tuple, Optional, Literal
 
 import numpy as np
 import open3d as o3d
@@ -422,7 +422,7 @@ class _TextRenderer:
         "mono": None,
     }
 
-    def __init__(self, font_type: str = "tex"):
+    def __init__(self, font_type: Literal["tex", "serif", "sans", "mono"] = "tex"):
         """
         Initializes the renderer with a specific font type.
         """