Proposed replacements for methods removed from `processing_utils` in `gradio` 4.0

These changes are needed because we no longer work with base64 representations at all, instead we directly upload images and send filepaths back and forth. These changes should fix the errors that we're seeing in the logs, but NOTE: they have NOT been tested

app.py

@@ -15,6 +15,7 @@ from diffusers import (
     DPMSolverMultistepScheduler,  # <-- Added import
     EulerDiscreteScheduler  # <-- Added import
 )
+import tempfile
 import time
 from share_btn import community_icon_html, loading_icon_html, share_js
 import user_history
@@ -99,12 +100,13 @@ def check_inputs(prompt: str, control_image: Image.Image):
         raise gr.Error("Prompt is required")
 
 def convert_to_pil(base64_image):
-    pil_image = processing_utils.decode_base64_to_image(base64_image)
+    pil_image = Image.open(base64_image)
     return pil_image
 
 def convert_to_base64(pil_image):
-    base64_image = processing_utils.encode_pil_to_base64(pil_image)
-    return base64_image
+    with tempfile.NamedTemporaryFile(suffix='.png', delete=False) as temp_file:
+        image.save(temp_file.name)
+    return temp_file.name
 
 # Inference function
 @spaces.GPU