Update app.py

app.py

@@ -11,43 +11,44 @@ def image_to_svg(image, colormode, hierarchical, filter_speckle, color_precision
     if image is None:
         return None, "Upload an image and click 'Convert'.", None
 
-    # The input 'image' from gr.Image(type='filepath') is the path string.
     input_path = image
     
-    # Use a temporary directory for the output to ensure a clean file system
-    with tempfile.TemporaryDirectory() as temp_dir:
-        output_filename = f"{os.path.splitext(os.path.basename(input_path))[0]}.svg"
-        output_path = os.path.join(temp_dir, output_filename)
+    # **FIX:** Create a named temporary file that will NOT be deleted automatically.
+    # We use delete=False to ensure the file persists after the function returns.
+    # Gradio will handle the cleanup of this file from its own cache.
+    with tempfile.NamedTemporaryFile(delete=False, suffix=".svg", mode='w', encoding='utf-8') as temp_output_file:
+        output_path = temp_output_file.name
 
-        try:
-            # vtracer conversion call with all parameters from the UI
-            vtracer.convert_image_to_svg_py(
-                input_path,
-                output_path,
-                colormode=colormode.lower(),
-                hierarchical=hierarchical.lower(),
-                mode=mode.lower(),
-                filter_speckle=int(filter_speckle),
-                color_precision=int(color_precision),
-                layer_difference=int(layer_difference),
-                corner_threshold=int(corner_threshold),
-                length_threshold=float(length_threshold),
-                splice_threshold=int(splice_threshold),
-                path_precision=int(path_precision),
-                max_iterations=10 # A reasonable default
-            )
+    try:
+        # vtracer conversion call with all parameters from the UI
+        vtracer.convert_image_to_svg_py(
+            input_path,
+            output_path,
+            colormode=colormode.lower(),
+            hierarchical=hierarchical.lower(),
+            mode=mode.lower(),
+            filter_speckle=int(filter_speckle),
+            color_precision=int(color_precision),
+            layer_difference=int(layer_difference),
+            corner_threshold=int(corner_threshold),
+            length_threshold=float(length_threshold),
+            splice_threshold=int(splice_threshold),
+            path_precision=int(path_precision),
+            max_iterations=10 # A reasonable default
+        )
 
-            # Read the generated SVG content to display in the code block
-            with open(output_path, "r") as f:
-                svg_content = f.read()
-            
-            # Return the path for file download, the SVG code, and the path for the image preview
-            return output_path, svg_content, output_path
+        # Read the generated SVG content to display in the code block
+        with open(output_path, "r", encoding='utf-8') as f:
+            svg_content = f.read()
+        
+        # Return the path for file download, the SVG code, and the path for the image preview.
+        # The file at output_path now exists and Gradio can access it.
+        return output_path, svg_content, output_path
 
-        except Exception as e:
-            # Handle potential errors during conversion and display them
-            error_message = f"An error occurred during conversion: {str(e)}"
-            return None, error_message, None
+    except Exception as e:
+        # Handle potential errors during conversion and display them
+        error_message = f"An error occurred during conversion: {str(e)}"
+        return None, error_message, None
 
 
 # --- Gradio User Interface ---
@@ -76,7 +77,6 @@ with gr.Blocks(theme=gr.themes.Soft(primary_hue="blue")) as demo:
                 splice_threshold = gr.Slider(0, 180, value=45, step=1, label="Splice Threshold (Less accurate)")
                 path_precision = gr.Slider(1, 8, value=3, step=1, label="Path Precision")
             
-            # Add a dedicated button to trigger the conversion
             convert_button = gr.Button("Convert", variant="primary")
         
         # ----- Output Column -----
@@ -89,7 +89,6 @@ with gr.Blocks(theme=gr.themes.Soft(primary_hue="blue")) as demo:
             
             svg_file_output = gr.File(label="Download SVG")
 
-    # ----- Documentation -----
     with gr.Accordion("How VTracer Works (Technical Details)", open=False):
         gr.Markdown(
         """
@@ -103,7 +102,6 @@ with gr.Blocks(theme=gr.themes.Soft(primary_hue="blue")) as demo:
         """
         )
 
-    # List of all input controls
     inputs = [
         image_input, colormode, hierarchical, filter_speckle, color_precision, 
         layer_difference, mode, corner_threshold, length_threshold, splice_threshold, path_precision
@@ -111,8 +109,6 @@ with gr.Blocks(theme=gr.themes.Soft(primary_hue="blue")) as demo:
     
     outputs = [svg_file_output, svg_text_output, svg_image_output]
 
-    # **FIX:** Connect the button's 'click' event to the conversion function.
-    # This is the stable and correct way to handle the event.
     convert_button.click(fn=image_to_svg, inputs=inputs, outputs=outputs)
 
 # To launch the application