from ..models import ModelManager, SDXLTextEncoder, SDXLTextEncoder2, SDXLUNet, SDXLVAEDecoder, SDXLVAEEncoder, SDXLIpAdapter, IpAdapterXLCLIPImageEmbedder # TODO: SDXL ControlNet from ..prompts import SDXLPrompter from ..schedulers import EnhancedDDIMScheduler from .dancer import lets_dance_xl import torch from tqdm import tqdm from PIL import Image import numpy as np class SDXLImagePipeline(torch.nn.Module): def __init__(self, device="cuda", torch_dtype=torch.float16): super().__init__() self.scheduler = EnhancedDDIMScheduler() self.prompter = SDXLPrompter() self.device = device self.torch_dtype = torch_dtype # models self.text_encoder: SDXLTextEncoder = None self.text_encoder_2: SDXLTextEncoder2 = None self.unet: SDXLUNet = None self.vae_decoder: SDXLVAEDecoder = None self.vae_encoder: SDXLVAEEncoder = None self.ipadapter_image_encoder: IpAdapterXLCLIPImageEmbedder = None self.ipadapter: SDXLIpAdapter = None # TODO: SDXL ControlNet def fetch_main_models(self, model_manager: ModelManager): self.text_encoder = model_manager.text_encoder self.text_encoder_2 = model_manager.text_encoder_2 self.unet = model_manager.unet self.vae_decoder = model_manager.vae_decoder self.vae_encoder = model_manager.vae_encoder def fetch_controlnet_models(self, model_manager: ModelManager, **kwargs): # TODO: SDXL ControlNet pass def fetch_ipadapter(self, model_manager: ModelManager): if "ipadapter_xl" in model_manager.model: self.ipadapter = model_manager.ipadapter_xl if "ipadapter_xl_image_encoder" in model_manager.model: self.ipadapter_image_encoder = model_manager.ipadapter_xl_image_encoder def fetch_prompter(self, model_manager: ModelManager): self.prompter.load_from_model_manager(model_manager) @staticmethod def from_model_manager(model_manager: ModelManager, controlnet_config_units = [], **kwargs): pipe = SDXLImagePipeline( device=model_manager.device, torch_dtype=model_manager.torch_dtype, ) pipe.fetch_main_models(model_manager) pipe.fetch_prompter(model_manager) pipe.fetch_controlnet_models(model_manager, controlnet_config_units=controlnet_config_units) pipe.fetch_ipadapter(model_manager) return pipe def preprocess_image(self, image): image = torch.Tensor(np.array(image, dtype=np.float32) * (2 / 255) - 1).permute(2, 0, 1).unsqueeze(0) return image def decode_image(self, latent, tiled=False, tile_size=64, tile_stride=32): image = self.vae_decoder(latent.to(self.device), tiled=tiled, tile_size=tile_size, tile_stride=tile_stride)[0] image = image.cpu().permute(1, 2, 0).numpy() image = Image.fromarray(((image / 2 + 0.5).clip(0, 1) * 255).astype("uint8")) return image @torch.no_grad() def __call__( self, prompt, negative_prompt="", cfg_scale=7.5, clip_skip=1, clip_skip_2=2, input_image=None, ipadapter_images=None, ipadapter_scale=1.0, controlnet_image=None, denoising_strength=1.0, height=1024, width=1024, num_inference_steps=20, tiled=False, tile_size=64, tile_stride=32, progress_bar_cmd=tqdm, progress_bar_st=None, ): # Prepare scheduler self.scheduler.set_timesteps(num_inference_steps, denoising_strength) # Prepare latent tensors if input_image is not None: image = self.preprocess_image(input_image).to(device=self.device, dtype=self.torch_dtype) latents = self.vae_encoder(image.to(torch.float32), tiled=tiled, tile_size=tile_size, tile_stride=tile_stride).to(self.torch_dtype) noise = torch.randn((1, 4, height//8, width//8), device=self.device, dtype=self.torch_dtype) latents = self.scheduler.add_noise(latents, noise, timestep=self.scheduler.timesteps[0]) else: latents = torch.randn((1, 4, height//8, width//8), device=self.device, dtype=self.torch_dtype) # Encode prompts add_prompt_emb_posi, prompt_emb_posi = self.prompter.encode_prompt( self.text_encoder, self.text_encoder_2, prompt, clip_skip=clip_skip, clip_skip_2=clip_skip_2, device=self.device, positive=True, ) if cfg_scale != 1.0: add_prompt_emb_nega, prompt_emb_nega = self.prompter.encode_prompt( self.text_encoder, self.text_encoder_2, negative_prompt, clip_skip=clip_skip, clip_skip_2=clip_skip_2, device=self.device, positive=False, ) # Prepare positional id add_time_id = torch.tensor([height, width, 0, 0, height, width], device=self.device) # IP-Adapter if ipadapter_images is not None: ipadapter_image_encoding = self.ipadapter_image_encoder(ipadapter_images) ipadapter_kwargs_list_posi = self.ipadapter(ipadapter_image_encoding, scale=ipadapter_scale) ipadapter_kwargs_list_nega = self.ipadapter(torch.zeros_like(ipadapter_image_encoding)) else: ipadapter_kwargs_list_posi, ipadapter_kwargs_list_nega = {}, {} # Denoise for progress_id, timestep in enumerate(progress_bar_cmd(self.scheduler.timesteps)): timestep = torch.IntTensor((timestep,))[0].to(self.device) # Classifier-free guidance noise_pred_posi = lets_dance_xl( self.unet, sample=latents, timestep=timestep, encoder_hidden_states=prompt_emb_posi, add_time_id=add_time_id, add_text_embeds=add_prompt_emb_posi, tiled=tiled, tile_size=tile_size, tile_stride=tile_stride, ipadapter_kwargs_list=ipadapter_kwargs_list_posi, ) if cfg_scale != 1.0: noise_pred_nega = lets_dance_xl( self.unet, sample=latents, timestep=timestep, encoder_hidden_states=prompt_emb_nega, add_time_id=add_time_id, add_text_embeds=add_prompt_emb_nega, tiled=tiled, tile_size=tile_size, tile_stride=tile_stride, ipadapter_kwargs_list=ipadapter_kwargs_list_nega, ) noise_pred = noise_pred_nega + cfg_scale * (noise_pred_posi - noise_pred_nega) else: noise_pred = noise_pred_posi latents = self.scheduler.step(noise_pred, timestep, latents) if progress_bar_st is not None: progress_bar_st.progress(progress_id / len(self.scheduler.timesteps)) # Decode image image = self.decode_image(latents.to(torch.float32), tiled=tiled, tile_size=tile_size, tile_stride=tile_stride) return image