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# Project EmbodiedGen
#
# Copyright (c) 2025 Horizon Robotics. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
# implied. See the License for the specific language governing
# permissions and limitations under the License.
import logging
import random
import numpy as np
import torch
from diffusers import (
AutoencoderKL,
EulerDiscreteScheduler,
UNet2DConditionModel,
)
from kolors.models.modeling_chatglm import ChatGLMModel
from kolors.models.tokenization_chatglm import ChatGLMTokenizer
from kolors.models.unet_2d_condition import (
UNet2DConditionModel as UNet2DConditionModelIP,
)
from kolors.pipelines.pipeline_stable_diffusion_xl_chatglm_256 import (
StableDiffusionXLPipeline,
)
from kolors.pipelines.pipeline_stable_diffusion_xl_chatglm_256_ipadapter import ( # noqa
StableDiffusionXLPipeline as StableDiffusionXLPipelineIP,
)
from PIL import Image
from transformers import CLIPImageProcessor, CLIPVisionModelWithProjection
logging.basicConfig(level=logging.INFO)
logger = logging.getLogger(__name__)
__all__ = [
"build_text2img_ip_pipeline",
"build_text2img_pipeline",
"text2img_gen",
]
def build_text2img_ip_pipeline(
ckpt_dir: str,
ref_scale: float,
device: str = "cuda",
) -> StableDiffusionXLPipelineIP:
text_encoder = ChatGLMModel.from_pretrained(
f"{ckpt_dir}/text_encoder", torch_dtype=torch.float16
).half()
tokenizer = ChatGLMTokenizer.from_pretrained(f"{ckpt_dir}/text_encoder")
vae = AutoencoderKL.from_pretrained(
f"{ckpt_dir}/vae", revision=None
).half()
scheduler = EulerDiscreteScheduler.from_pretrained(f"{ckpt_dir}/scheduler")
unet = UNet2DConditionModelIP.from_pretrained(
f"{ckpt_dir}/unet", revision=None
).half()
image_encoder = CLIPVisionModelWithProjection.from_pretrained(
f"{ckpt_dir}/../Kolors-IP-Adapter-Plus/image_encoder",
ignore_mismatched_sizes=True,
).to(dtype=torch.float16)
clip_image_processor = CLIPImageProcessor(size=336, crop_size=336)
pipe = StableDiffusionXLPipelineIP(
vae=vae,
text_encoder=text_encoder,
tokenizer=tokenizer,
unet=unet,
scheduler=scheduler,
image_encoder=image_encoder,
feature_extractor=clip_image_processor,
force_zeros_for_empty_prompt=False,
)
if hasattr(pipe.unet, "encoder_hid_proj"):
pipe.unet.text_encoder_hid_proj = pipe.unet.encoder_hid_proj
pipe.load_ip_adapter(
f"{ckpt_dir}/../Kolors-IP-Adapter-Plus",
subfolder="",
weight_name=["ip_adapter_plus_general.bin"],
)
pipe.set_ip_adapter_scale([ref_scale])
pipe = pipe.to(device)
# pipe.enable_model_cpu_offload()
# pipe.enable_xformers_memory_efficient_attention()
# pipe.enable_vae_slicing()
return pipe
def build_text2img_pipeline(
ckpt_dir: str,
device: str = "cuda",
) -> StableDiffusionXLPipeline:
text_encoder = ChatGLMModel.from_pretrained(
f"{ckpt_dir}/text_encoder", torch_dtype=torch.float16
).half()
tokenizer = ChatGLMTokenizer.from_pretrained(f"{ckpt_dir}/text_encoder")
vae = AutoencoderKL.from_pretrained(
f"{ckpt_dir}/vae", revision=None
).half()
scheduler = EulerDiscreteScheduler.from_pretrained(f"{ckpt_dir}/scheduler")
unet = UNet2DConditionModel.from_pretrained(
f"{ckpt_dir}/unet", revision=None
).half()
pipe = StableDiffusionXLPipeline(
vae=vae,
text_encoder=text_encoder,
tokenizer=tokenizer,
unet=unet,
scheduler=scheduler,
force_zeros_for_empty_prompt=False,
)
pipe = pipe.to(device)
# pipe.enable_model_cpu_offload()
# pipe.enable_xformers_memory_efficient_attention()
return pipe
def text2img_gen(
prompt: str,
n_sample: int,
guidance_scale: float,
pipeline: StableDiffusionXLPipeline | StableDiffusionXLPipelineIP,
ip_image: Image.Image | str = None,
image_wh: tuple[int, int] = [1024, 1024],
infer_step: int = 50,
ip_image_size: int = 512,
seed: int = None,
) -> list[Image.Image]:
prompt = "Single " + prompt + ", in the center of the image"
prompt += ", high quality, high resolution, best quality, white background, 3D style" # noqa
logger.info(f"Processing prompt: {prompt}")
generator = None
if seed is not None:
generator = torch.Generator(pipeline.device).manual_seed(seed)
torch.manual_seed(seed)
np.random.seed(seed)
random.seed(seed)
kwargs = dict(
prompt=prompt,
height=image_wh[1],
width=image_wh[0],
num_inference_steps=infer_step,
guidance_scale=guidance_scale,
num_images_per_prompt=n_sample,
generator=generator,
)
if ip_image is not None:
if isinstance(ip_image, str):
ip_image = Image.open(ip_image)
ip_image = ip_image.resize((ip_image_size, ip_image_size))
kwargs.update(ip_adapter_image=[ip_image])
return pipeline(**kwargs).images
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