app.py

from diffusers import StableDiffusionPipeline
from diffusers import StableDiffusionImg2ImgPipeline
import gradio as gr
import torch
from PIL import Image
import utils

is_colab = utils.is_google_colab()

max_width = 832
max_height = 832

class Model:
    def __init__(self, name, path, prefix):
        self.name = name
        self.path = path
        self.prefix = prefix

models = [
     Model("Custom model", "", ""),
     Model("Arcane", "nitrosocke/Arcane-Diffusion", "arcane style "),
     Model("Archer", "nitrosocke/archer-diffusion", "archer style "),
     Model("Elden Ring", "nitrosocke/elden-ring-diffusion", "elden ring style "),
     Model("Spider-Verse", "nitrosocke/spider-verse-diffusion", "spiderverse style "),
     Model("Modern Disney", "nitrosocke/modern-disney-diffusion", "modern disney style "),
     Model("Classic Disney", "nitrosocke/classic-anim-diffusion", ""),
     Model("Waifu", "hakurei/waifu-diffusion", ""),
     Model("Pokémon", "lambdalabs/sd-pokemon-diffusers", ""),
     Model("Fuyuko Waifu", "yuk/fuyuko-waifu-diffusion", ""),
     Model("Pony Diffusion", "AstraliteHeart/pony-diffusion", ""),
     Model("Robo Diffusion", "nousr/robo-diffusion", ""),
     Model("Cyberpunk Anime", "DGSpitzer/Cyberpunk-Anime-Diffusion", "dgs illustration style "),
     Model("Hergé Style", "sd-dreambooth-library/herge-style", "herge_style "),
]

current_model = models[1]
current_model_path = current_model.path
pipe = StableDiffusionPipeline.from_pretrained(current_model.path, torch_dtype=torch.float16)
if torch.cuda.is_available():
  pipe = pipe.to("cuda")

device = "GPU 🔥" if torch.cuda.is_available() else "CPU 🥶"

def custom_model_changed(path):
  models[0].path = path
  current_model = models[0]
  return models[0].path

def inference(model_name, prompt, guidance, steps, width=512, height=512, seed=0, img=None, strength=0.5, neg_prompt=""):

  global current_model
  for model in models:
    if model.name == model_name:
      current_model = model
      model_path = current_model.path

  generator = torch.Generator('cuda').manual_seed(seed) if seed != 0 else None

  if img is not None:
    return img_to_img(model_path, prompt, neg_prompt, img, strength, guidance, steps, width, height, generator)
  else:
    return txt_to_img(model_path, prompt, neg_prompt, guidance, steps, width, height, generator)

def txt_to_img(model_path, prompt, neg_prompt, guidance, steps, width, height, generator=None):

    global pipe
    global current_model_path
    if model_path != current_model_path:
        current_model_path = model_path

        pipe = StableDiffusionPipeline.from_pretrained(current_model_path, torch_dtype=torch.float16)
        if torch.cuda.is_available():
          pipe = pipe.to("cuda")

    prompt = current_model.prefix + prompt
    results = pipe(
      prompt,
      negative_prompt=neg_prompt,
      num_inference_steps=int(steps),
      guidance_scale=guidance,
      width=width,
      height=height,
      generator=generator)
    
    image = results.images[0] if not results.nsfw_content_detected[0] else Image.open("nsfw.png")
    return image

def img_to_img(model_path, prompt, neg_prompt, img, strength, guidance, steps, width, height, generator):

    global pipe
    global current_model_path
    if model_path != current_model_path:
        current_model_path = model_path

        pipe = StableDiffusionImg2ImgPipeline.from_pretrained(current_model_path, torch_dtype=torch.float16)
        
        if torch.cuda.is_available():
              pipe = pipe.to("cuda")

    prompt = current_model.prefix + prompt
    ratio = min(max_height / img.height, max_width / img.width)
    img = img.resize((int(img.width * ratio), int(img.height * ratio)))
    results = pipe(
        prompt,
        negative_prompt=neg_prompt,
        init_image=img,
        num_inference_steps=int(steps),
        strength=strength,
        guidance_scale=guidance,
        width=width,
        height=height,
        generator=generator)
        
    image = results.images[0] if not results.nsfw_content_detected[0] else Image.open("nsfw.png")
    return image

css = """
  <style>
  .finetuned-diffusion-div {
      text-align: center;
      max-width: 700px;
      margin: 0 auto;
    }
    .finetuned-diffusion-div div {
      display: inline-flex;
      align-items: center;
      gap: 0.8rem;
      font-size: 1.75rem;
    }
    .finetuned-diffusion-div div h1 {
      font-weight: 900;
      margin-bottom: 7px;
    }
    .finetuned-diffusion-div p {
      margin-bottom: 10px;
      font-size: 94%;
    }
    .finetuned-diffusion-div p a {
      text-decoration: underline;
    }
  </style>
"""
with gr.Blocks(css=css) as demo:
    gr.HTML(
        f"""
            <div class="finetuned-diffusion-div">
              <div>
                <h1>Finetuned Diffusion</h1>
              </div>
              <p>
               Demo for multiple fine-tuned Stable Diffusion models, trained on different styles: <br>
               <a href="https://huggingface.co/nitrosocke/Arcane-Diffusion">Arcane</a>, <a href="https://huggingface.co/nitrosocke/archer-diffusion">Archer</a>, <a href="https://huggingface.co/nitrosocke/elden-ring-diffusion">Elden Ring</a>, <a href="https://huggingface.co/nitrosocke/spider-verse-diffusion">Spiderverse</a>, <a href="https://huggingface.co/nitrosocke/modern-disney-diffusion">Modern Disney</a>, <a href="https://huggingface.co/hakurei/waifu-diffusion">Waifu</a>, <a href="https://huggingface.co/lambdalabs/sd-pokemon-diffusers">Pokemon</a>, <a href="https://huggingface.co/yuk/fuyuko-waifu-diffusion">Fuyuko Waifu</a>, <a href="https://huggingface.co/AstraliteHeart/pony-diffusion">Pony</a>, <a href="https://huggingface.co/sd-dreambooth-library/herge-style">Hergé (Tintin)</a>, <a href="https://huggingface.co/nousr/robo-diffusion">Robo</a>, <a href="https://huggingface.co/DGSpitzer/Cyberpunk-Anime-Diffusion">Cyberpunk Anime</a>
              </p> <br>
              <p>
               Running on <b>{device}</b>
              </p>
            </div>
        """
    )
    with gr.Row():
        
        with gr.Column():
            model_name = gr.Dropdown(label="Model", choices=[m.name for m in models], value=current_model.name)
            custom_model_path = gr.Textbox(label="Custom model path", placeholder="Path to model, e.g. nitrosocke/Arcane-Diffusion", visible=False, interactive=True)
            prompt = gr.Textbox(label="Prompt", placeholder="Style prefix is applied automatically")
            run = gr.Button(value="Run")

            with gr.Tab("Options"):
                neg_prompt = gr.Textbox(label="Negative prompt", placeholder="What to exclude from the image")
                guidance = gr.Slider(label="Guidance scale", value=7.5, maximum=15)
                steps = gr.Slider(label="Steps", value=50, maximum=100, minimum=2, step=1)
                width = gr.Slider(label="Width", value=512, maximum=max_width, minimum=64, step=8)
                height = gr.Slider(label="Height", value=512, maximum=max_height, minimum=64, step=8)
                seed = gr.Slider(0, 2147483647, label='Seed (0 = random)', value=0, step=1)
                
            with gr.Tab("Image to image"):
                image = gr.Image(label="Image", height=256, tool="editor", type="pil")
                strength = gr.Slider(label="Transformation strength", minimum=0, maximum=1, step=0.01, value=0.5)

        with gr.Column():
            image_out = gr.Image(height=512)
            log = gr.Textbox()

    model_name.change(lambda x: gr.update(visible = x == models[0].name), inputs=model_name, outputs=custom_model_path)
    custom_model_path.change(custom_model_changed, inputs=custom_model_path, outputs=log)
    inputs = [model_name, prompt, guidance, steps, width, height, seed, image, strength, neg_prompt]
    prompt.submit(inference, inputs=inputs, outputs=image_out, scroll_to_output=True)
    run.click(inference, inputs=inputs, outputs=image_out, scroll_to_output=True)
  
    gr.Examples([
        [models[1].name, "jason bateman disassembling the demon core", 7.5, 50],
        [models[4].name, "portrait of dwayne johnson", 7.0, 75],
        [models[5].name, "portrait of a beautiful alyx vance half life", 10, 50],
        [models[6].name, "Aloy from Horizon: Zero Dawn, half body portrait, smooth, detailed armor, beautiful face, illustration", 7.0, 45],
        [models[5].name, "fantasy portrait painting, digital art", 4.0, 30],
    ], [model_name, prompt, guidance, steps, seed], image_out, inference, cache_examples=not is_colab and torch.cuda.is_available())
  
    gr.Markdown('''
      Models by [@nitrosocke](https://huggingface.co/nitrosocke), [@Helixngc7293](https://twitter.com/DGSpitzer) and others. ❤️<br>
      Space by: [![Twitter Follow](https://img.shields.io/twitter/follow/hahahahohohe?label=%40anzorq&style=social)](https://twitter.com/hahahahohohe)
  
      ![visitors](https://visitor-badge.glitch.me/badge?page_id=anzorq.finetuned_diffusion)
    ''')

if not is_colab:
  demo.queue(concurrency_count=4)
demo.launch(debug=is_colab, share=is_colab)