import os import re import time from io import BytesIO import uuid from dataclasses import dataclass from glob import iglob import argparse from einops import rearrange from fire import Fire from PIL import ExifTags, Image import torch import torch.nn.functional as F import gradio as gr import numpy as np from transformers import pipeline from flux.sampling import denoise, get_schedule, prepare, unpack from flux.util import (configs, embed_watermark, load_ae, load_clip, load_flow_model, load_t5) @dataclass class SamplingOptions: source_prompt: str target_prompt: str # prompt: str width: int height: int num_steps: int guidance: float seed: int | None @torch.inference_mode() def encode(init_image, torch_device, ae): init_image = torch.from_numpy(init_image).permute(2, 0, 1).float() / 127.5 - 1 init_image = init_image.unsqueeze(0) init_image = init_image.to(torch_device) with torch.no_grad(): init_image = ae.encode(init_image.to()).to(torch.bfloat16) return init_image class FluxEditor: def __init__(self, args): self.args = args self.device = torch.device(args.device) self.offload = args.offload self.name = args.name self.is_schnell = args.name == "flux-schnell" self.feature_path = 'feature' self.output_dir = 'result' self.add_sampling_metadata = True if self.name not in configs: available = ", ".join(configs.keys()) raise ValueError(f"Got unknown model name: {name}, chose from {available}") # init all components self.t5 = load_t5(self.device, max_length=256 if self.name == "flux-schnell" else 512) self.clip = load_clip(self.device) self.model = load_flow_model(self.name, device="cpu" if self.offload else self.device) self.ae = load_ae(self.name, device="cpu" if self.offload else self.device) self.t5.eval() self.clip.eval() self.ae.eval() self.model.eval() if self.offload: self.model.cpu() torch.cuda.empty_cache() self.ae.encoder.to(self.device) @torch.inference_mode() def edit(self, init_image, source_prompt, target_prompt, num_steps, inject_step, guidance, seed): torch.cuda.empty_cache() seed = None # if seed == -1: # seed = None shape = init_image.shape new_h = shape[0] if shape[0] % 16 == 0 else shape[0] - shape[0] % 16 new_w = shape[1] if shape[1] % 16 == 0 else shape[1] - shape[1] % 16 init_image = init_image[:new_h, :new_w, :] width, height = init_image.shape[0], init_image.shape[1] init_image = encode(init_image, self.device, self.ae) print(init_image.shape) rng = torch.Generator(device="cpu") opts = SamplingOptions( source_prompt=source_prompt, target_prompt=target_prompt, width=width, height=height, num_steps=num_steps, guidance=guidance, seed=seed, ) if opts.seed is None: opts.seed = torch.Generator(device="cpu").seed() print(f"Generating with seed {opts.seed}:\n{opts.source_prompt}") t0 = time.perf_counter() opts.seed = None if self.offload: self.ae = self.ae.cpu() torch.cuda.empty_cache() self.t5, self.clip = self.t5.to(self.device), self.clip.to(self.device) #############inverse####################### info = {} info['feature'] = {} info['inject_step'] = inject_step if not os.path.exists(self.feature_path): os.mkdir(self.feature_path) with torch.no_grad(): inp = prepare(self.t5, self.clip, init_image, prompt=opts.source_prompt) inp_target = prepare(self.t5, self.clip, init_image, prompt=opts.target_prompt) timesteps = get_schedule(opts.num_steps, inp["img"].shape[1], shift=(self.name != "flux-schnell")) # offload TEs to CPU, load model to gpu if self.offload: self.t5, self.clip = self.t5.cpu(), self.clip.cpu() torch.cuda.empty_cache() self.model = self.model.to(self.device) # inversion initial noise with torch.no_grad(): z, info = denoise(self.model, **inp, timesteps=timesteps, guidance=1, inverse=True, info=info) inp_target["img"] = z timesteps = get_schedule(opts.num_steps, inp_target["img"].shape[1], shift=(self.name != "flux-schnell")) # denoise initial noise x, _ = denoise(self.model, **inp_target, timesteps=timesteps, guidance=guidance, inverse=False, info=info) # offload model, load autoencoder to gpu if self.offload: self.model.cpu() torch.cuda.empty_cache() self.ae.decoder.to(x.device) # decode latents to pixel space x = unpack(x.float(), opts.width, opts.height) output_name = os.path.join(self.output_dir, "img_{idx}.jpg") if not os.path.exists(self.output_dir): os.makedirs(self.output_dir) idx = 0 else: fns = [fn for fn in iglob(output_name.format(idx="*")) if re.search(r"img_[0-9]+\.jpg$", fn)] if len(fns) > 0: idx = max(int(fn.split("_")[-1].split(".")[0]) for fn in fns) + 1 else: idx = 0 with torch.autocast(device_type=self.device.type, dtype=torch.bfloat16): x = self.ae.decode(x) if torch.cuda.is_available(): torch.cuda.synchronize() t1 = time.perf_counter() fn = output_name.format(idx=idx) print(f"Done in {t1 - t0:.1f}s. Saving {fn}") # bring into PIL format and save x = x.clamp(-1, 1) x = embed_watermark(x.float()) x = rearrange(x[0], "c h w -> h w c") img = Image.fromarray((127.5 * (x + 1.0)).cpu().byte().numpy()) exif_data = Image.Exif() exif_data[ExifTags.Base.Software] = "AI generated;txt2img;flux" exif_data[ExifTags.Base.Make] = "Black Forest Labs" exif_data[ExifTags.Base.Model] = self.name if self.add_sampling_metadata: exif_data[ExifTags.Base.ImageDescription] = source_prompt img.save(fn, exif=exif_data, quality=95, subsampling=0) print("End Edit") return img def create_demo(model_name: str, device: str = "cuda" if torch.cuda.is_available() else "cpu", offload: bool = False): editor = FluxEditor(args) is_schnell = model_name == "flux-schnell" with gr.Blocks() as demo: gr.Markdown(f"# RF-Edit Demo (FLUX for image editing)") with gr.Row(): with gr.Column(): source_prompt = gr.Textbox(label="Source Prompt", value="") target_prompt = gr.Textbox(label="Target Prompt", value="") init_image = gr.Image(label="Input Image", visible=True) generate_btn = gr.Button("Generate") with gr.Column(): with gr.Accordion("Advanced Options", open=True): num_steps = gr.Slider(1, 30, 25, step=1, label="Number of steps") inject_step = gr.Slider(1, 15, 5, step=1, label="Number of inject steps") guidance = gr.Slider(1.0, 10.0, 2, step=0.1, label="Guidance", interactive=not is_schnell) # seed = gr.Textbox(0, label="Seed (-1 for random)", visible=False) # add_sampling_metadata = gr.Checkbox(label="Add sampling parameters to metadata?", value=False) output_image = gr.Image(label="Generated Image") generate_btn.click( fn=editor.edit, inputs=[init_image, source_prompt, target_prompt, num_steps, inject_step, guidance], outputs=[output_image] ) return demo if __name__ == "__main__": import argparse parser = argparse.ArgumentParser(description="Flux") parser.add_argument("--name", type=str, default="flux-dev", choices=list(configs.keys()), help="Model name") parser.add_argument("--device", type=str, default="cuda" if torch.cuda.is_available() else "cpu", help="Device to use") parser.add_argument("--offload", action="store_true", help="Offload model to CPU when not in use") parser.add_argument("--share", action="store_true", help="Create a public link to your demo") parser.add_argument("--port", type=int, default=41035) args = parser.parse_args() demo = create_demo(args.name, args.device, args.offload) demo.launch(server_name='0.0.0.0', share=args.share, server_port=args.port)