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pass_preview_image.py.txt

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+import logging
+import os
+import numpy as np
+from PIL import Image
+import json
+from PIL.PngImagePlugin import PngInfo
+
+class PassPreviewImage:
+    @classmethod
+    def INPUT_TYPES(cls):
+        return {
+            "required": {
+                "image": ("IMAGE", {"forceInput": True})
+            },
+            "hidden": {"prompt": "PROMPT", "extra_pnginfo": "EXTRA_PNGINFO"},
+        }
+
+    FUNCTION = "pass_preview_image"
+    RETURN_TYPES = ("IMAGE",)
+    OUTPUT_NODE = True
+    RETURN_NAMES = ("image",)
+
+    def pass_preview_image(self, image, prompt=None, extra_pnginfo=None):
+        # Ensure the output directory exists
+        os.makedirs("./output", exist_ok=True)
+
+        # Convert the image from ComfyUI format to PIL Image
+        i = 255. * image.cpu().numpy()
+        # Reshape the image if it's not in the expected format, remove any leading dimensions of size 1
+        if i.ndim > 3:
+            i = np.squeeze(i)
+        # Ensure the image is 3D (height, width, channels)
+        if i.ndim == 2:
+            i = i[:, :, np.newaxis]  # Add a channel dimension if it's missing
+
+        img = Image.fromarray(np.clip(i, 0, 255).astype(np.uint8))
+
+        # Prepare metadata
+        metadata = PngInfo()
+        if prompt is not None:
+            metadata.add_text("prompt", json.dumps(prompt))
+        if extra_pnginfo is not None:
+            for k, v in extra_pnginfo.items():
+                metadata.add_text(k, json.dumps(v))
+
+        # Save the image with metadata, overwriting if it exists
+        filename = "./output/tmp_preview.png"
+        img.save(filename, format="PNG", pnginfo=metadata)
+
+        print(f"Temporary image saved as: {filename}")
+
+        logging.info(f"image: {image}")
+        return (image, prompt, extra_pnginfo)