fix: Fix bug when mask not on same device (CORE-181) (Comfy-Org#13801)

Author: alexisrolland

comfy/bg_removal_model.py

@@ -47,7 +47,7 @@ def encode_image(self, image):
         out = self.model(pixel_values=pixel_values)
         out = torch.nn.functional.interpolate(out, size=(H, W), mode="bicubic", antialias=False)
 
-        mask = out.sigmoid()
+        mask = out.sigmoid().to(device=comfy.model_management.intermediate_device(), dtype=comfy.model_management.intermediate_dtype())
         if mask.ndim == 3:
             mask = mask.unsqueeze(0)
         if mask.shape[1] != 1:

comfy_extras/nodes_compositing.py

@@ -203,7 +203,7 @@ def define_schema(cls):
     @classmethod
     def execute(cls, image: torch.Tensor, alpha: torch.Tensor) -> io.NodeOutput:
         batch_size = max(len(image), len(alpha))
-        alpha = 1.0 - resize_mask(alpha, image.shape[1:])
+        alpha = 1.0 - resize_mask(alpha.to(image), image.shape[1:])
         alpha = comfy.utils.repeat_to_batch_size(alpha, batch_size)
         image = comfy.utils.repeat_to_batch_size(image, batch_size)
         return io.NodeOutput(torch.cat((image[..., :3], alpha.unsqueeze(-1)), dim=-1))