Add inpaint lora scale support (huggingface#3460)

* add inpaint lora scale support

* add inpaint lora scale test

---------

Co-authored-by: yueyang.hyy <yueyang.hyy@alibaba-inc.com>

Author: Glaceon-Hyy

src/diffusers/pipelines/stable_diffusion/pipeline_stable_diffusion_inpaint.py

@@ -14,7 +14,7 @@
 
 import inspect
 import warnings
-from typing import Callable, List, Optional, Union
+from typing import Any, Callable, Dict, List, Optional, Union
 
 import numpy as np
 import PIL
@@ -744,6 +744,7 @@ def __call__(
         return_dict: bool = True,
         callback: Optional[Callable[[int, int, torch.FloatTensor], None]] = None,
         callback_steps: int = 1,
+        cross_attention_kwargs: Optional[Dict[str, Any]] = None,
     ):
         r"""
         Function invoked when calling the pipeline for generation.
@@ -815,7 +816,10 @@ def __call__(
             callback_steps (`int`, *optional*, defaults to 1):
                 The frequency at which the `callback` function will be called. If not specified, the callback will be
                 called at every step.
-
+            cross_attention_kwargs (`dict`, *optional*):
+                A kwargs dictionary that if specified is passed along to the `AttentionProcessor` as defined under
+                `self.processor` in
+                [diffusers.cross_attention](https://github.com/huggingface/diffusers/blob/main/src/diffusers/models/cross_attention.py).
         Examples:
 
         ```py
@@ -966,9 +970,13 @@ def __call__(
                 latent_model_input = torch.cat([latent_model_input, mask, masked_image_latents], dim=1)
 
                 # predict the noise residual
-                noise_pred = self.unet(latent_model_input, t, encoder_hidden_states=prompt_embeds, return_dict=False)[
-                    0
-                ]
+                noise_pred = self.unet(
+                    latent_model_input,
+                    t,
+                    encoder_hidden_states=prompt_embeds,
+                    cross_attention_kwargs=cross_attention_kwargs,
+                    return_dict=False,
+                )[0]
 
                 # perform guidance
                 if do_classifier_free_guidance:

tests/pipelines/stable_diffusion/test_stable_diffusion_inpaint.py

@@ -35,6 +35,7 @@
 from diffusers.utils import floats_tensor, load_image, load_numpy, nightly, slow, torch_device
 from diffusers.utils.testing_utils import require_torch_gpu
 
+from ...models.test_models_unet_2d_condition import create_lora_layers
 from ..pipeline_params import TEXT_GUIDED_IMAGE_INPAINTING_BATCH_PARAMS, TEXT_GUIDED_IMAGE_INPAINTING_PARAMS
 from ..test_pipelines_common import PipelineLatentTesterMixin, PipelineTesterMixin
 
@@ -155,6 +156,40 @@ def test_stable_diffusion_inpaint_image_tensor(self):
         assert out_pil.shape == (1, 64, 64, 3)
         assert np.abs(out_pil.flatten() - out_tensor.flatten()).max() < 5e-2
 
+    def test_stable_diffusion_inpaint_lora(self):
+        device = "cpu"  # ensure determinism for the device-dependent torch.Generator
+
+        components = self.get_dummy_components()
+        sd_pipe = StableDiffusionInpaintPipeline(**components)
+        sd_pipe = sd_pipe.to(torch_device)
+        sd_pipe.set_progress_bar_config(disable=None)
+
+        # forward 1
+        inputs = self.get_dummy_inputs(device)
+        output = sd_pipe(**inputs)
+        image = output.images
+        image_slice = image[0, -3:, -3:, -1]
+
+        # set lora layers
+        lora_attn_procs = create_lora_layers(sd_pipe.unet)
+        sd_pipe.unet.set_attn_processor(lora_attn_procs)
+        sd_pipe = sd_pipe.to(torch_device)
+
+        # forward 2
+        inputs = self.get_dummy_inputs(device)
+        output = sd_pipe(**inputs, cross_attention_kwargs={"scale": 0.0})
+        image = output.images
+        image_slice_1 = image[0, -3:, -3:, -1]
+
+        # forward 3
+        inputs = self.get_dummy_inputs(device)
+        output = sd_pipe(**inputs, cross_attention_kwargs={"scale": 0.5})
+        image = output.images
+        image_slice_2 = image[0, -3:, -3:, -1]
+
+        assert np.abs(image_slice - image_slice_1).max() < 1e-2
+        assert np.abs(image_slice - image_slice_2).max() > 1e-2
+
     def test_inference_batch_single_identical(self):
         super().test_inference_batch_single_identical(expected_max_diff=3e-3)