fix: 🚑️ thread font loading

This created a huge lag on first opening of the browser.
The small drawback is that the webpage needs a reload
for fonts to be available

nodes/generate.py

@@ -1,9 +1,11 @@
-import qrcode
-from ..utils import pil2tensor
-from ..utils import comfy_dir
+import threading
 from typing import cast
+
+import qrcode
 from PIL import Image
+
 from ..log import log
+from ..utils import comfy_dir, pil2tensor
 
 # class MtbExamples:
 #     """MTB Example Images"""
@@ -74,9 +76,10 @@ class UnsplashImage:
     CATEGORY = "mtb/generate"
 
     def do_unsplash_image(self, width, height, random_seed, keyword=None):
-        import requests
         import io
 
+        import requests
+
         base_url = "https://source.unsplash.com/random/"
 
         if width and height:
@@ -201,12 +204,14 @@ class TextToImage:
 
         for font in fonts:
             log.debug(f"Adding font {font}")
-            cls.fonts[font.stem] = font.as_posix()
+            TextToImage.fonts[font.stem] = font.as_posix()
 
     @classmethod
     def INPUT_TYPES(cls):
         if not cls.fonts:
-            cls.CACHE_FONTS()
+            # cls.CACHE_FONTS()
+            thread = threading.Thread(target=cls.CACHE_FONTS)
+            thread.start()
         else:
             log.debug(f"Using cached fonts (count: {len(cls.fonts)})")
         return {
@@ -252,9 +257,10 @@ class TextToImage:
     def text_to_image(
         self, text, font, wrap, font_size, width, height, color, background
     ):
-        from PIL import Image, ImageDraw, ImageFont
         import textwrap
 
+        from PIL import Image, ImageDraw, ImageFont
+
         font = self.fonts[font]
         font = cast(ImageFont.FreeTypeFont, ImageFont.truetype(font, font_size))
         if wrap == 0: