Optimize Dumas image compare conversion path

dumas_image_nodes.py

@@ -7,6 +7,19 @@ from PIL import Image
 import folder_paths
 
 
+def _tensor_image_to_pil_image(tensor):
+    image_tensor = tensor[0]
+    if hasattr(image_tensor, "mul") and hasattr(image_tensor, "clamp"):
+        image_array = image_tensor.mul(255).clamp(0, 255)
+        if hasattr(image_array, "byte"):
+            image_array = image_array.byte()
+        image_array = image_array.cpu().numpy()
+        return Image.fromarray(image_array)
+
+    image_array = 255.0 * image_tensor.cpu().numpy()
+    return Image.fromarray(np.clip(image_array, 0, 255).astype(np.uint8))
+
+
 class DumasImageCompareNode:
     DESCRIPTION = (
         "Dumas Image Compare shows the difference between two images directly on "
@@ -54,25 +67,29 @@ class DumasImageCompareNode:
         }
 
     def compare_images(self, image1=None, image2=None):
-        pairs = ((1, image1), (2, image2))
+        present = []
-        present = [(slot, tensor) for slot, tensor in pairs if tensor is not None]
+        if image1 is not None:
+            present.append((1, image1))
+        if image2 is not None:
+            present.append((2, image2))
         results = []
 
         if present:
             first_tensor = present[0][1]
             prefix = "dumas_compare" + self.prefix_append
+            first_image = first_tensor[0]
             full_output_folder, filename, counter, subfolder, _ = folder_paths.get_save_image_path(
                 prefix,
                 self.output_dir,
-                first_tensor[0].shape[1],
+                first_image.shape[1],
-                first_tensor[0].shape[0],
+                first_image.shape[0],
             )
+            join_path = os.path.join
             for slot, tensor in present:
-                image_array = 255.0 * tensor[0].cpu().numpy()
+                image = _tensor_image_to_pil_image(tensor)
-                image = Image.fromarray(np.clip(image_array, 0, 255).astype(np.uint8))
                 file_name = f"{filename}_{counter:05}_.png"
                 image.save(
-                    os.path.join(full_output_folder, file_name),
+                    join_path(full_output_folder, file_name),
                     compress_level=self.compress_level,
                 )
                 results.append(