fix a bug

Rodin.py

@@ -111,7 +111,7 @@ def load_image(img_path):
     try:
         image = Image.open(img_path)
     except PIL.UnidentifiedImageError as e:
-        raise gr.Error("Invalid Image Format")
+        raise gr.Error("Unsupported Image Format")
 
     # 按比例缩小图像到长度为1024
     width, height = image.size
@@ -142,6 +142,9 @@ class Generator:
         self.processed_image = None
         
     def preprocess(self, prompt, image_path, processed_image , task_uuid=""):
+        if image_path == None:
+            raise gr.Error("Please upload an image first")
+        
         if processed_image and prompt and (not task_uuid):
             log("INFO", "Using cached image and prompt...")
             return prompt, processed_image
@@ -171,7 +174,7 @@ class Generator:
                 raise gr.Error("Error in image preprocessing, please try again.")
             elif preprocess_response.get("statusCode") == 400:
                 if "InvalidFile.Content" in preprocess_response.get("message"):
-                    raise gr.Error("Invalid Image Format")
+                    raise gr.Error("Unsupported Image Format")
                 else:
                     log("ERROR", f"Error in image preprocessing: {preprocess_response}")
                     raise gr.Error("Busy connection, please try again later.")

app.py

@@ -108,7 +108,7 @@ def clear_task(task_input=None):
     [cache_task_uuid, block_prompt, block_prompt_hint, fake3d]
     """
     log("INFO", "Clearing task...")
-    return "", "", [], "assets/white_image.png"
+    return "", "", "", [], "assets/white_image.png"
 
 def clear_task_id():
     return ""
@@ -177,7 +177,7 @@ with gr.Blocks() as demo:
         examples=example,
         fn=clear_task,
         inputs=[block_image],
-        outputs=[cache_task_uuid, block_prompt, block_prompt_hint, fake3d],
+        outputs=[cache_image_base64, cache_task_uuid, block_prompt, block_prompt_hint, fake3d],
         run_on_click=True,
         cache_examples=True,
         label="Examples"