add node - image compare (#11343)

comfy_extras/nodes_image_compare.py

@@ -0,0 +1,53 @@
+import nodes
+
+from typing_extensions import override
+from comfy_api.latest import IO, ComfyExtension
+
+
+class ImageCompare(IO.ComfyNode):
+    """Compares two images with a slider interface."""
+
+    @classmethod
+    def define_schema(cls):
+        return IO.Schema(
+            node_id="ImageCompare",
+            display_name="Image Compare",
+            description="Compares two images side by side with a slider.",
+            category="image",
+            is_experimental=True,
+            is_output_node=True,
+            inputs=[
+                IO.Image.Input("image_a", optional=True),
+                IO.Image.Input("image_b", optional=True),
+                IO.ImageCompare.Input("compare_view"),
+            ],
+            outputs=[],
+        )
+
+    @classmethod
+    def execute(cls, image_a=None, image_b=None, compare_view=None) -> IO.NodeOutput:
+        result = {"a_images": [], "b_images": []}
+
+        preview_node = nodes.PreviewImage()
+
+        if image_a is not None and len(image_a) > 0:
+            saved = preview_node.save_images(image_a, "comfy.compare.a")
+            result["a_images"] = saved["ui"]["images"]
+
+        if image_b is not None and len(image_b) > 0:
+            saved = preview_node.save_images(image_b, "comfy.compare.b")
+            result["b_images"] = saved["ui"]["images"]
+
+        return IO.NodeOutput(ui=result)
+
+
+class ImageCompareExtension(ComfyExtension):
+    @override
+    async def get_node_list(self) -> list[type[IO.ComfyNode]]:
+        return [
+            ImageCompare,
+        ]
+
+
+async def comfy_entrypoint() -> ImageCompareExtension:
+    return ImageCompareExtension()