app.py

import spaces
import gradio as gr
import torch
from PIL import Image

from diffusers.utils import load_image
from pipeline import FluxConditionalPipeline
from transformer import FluxTransformer2DConditionalModel

import os

pipe = None

CHECKPOINT = "primecai/dsd_model"

device = torch.device("cuda" if torch.cuda.is_available() else "cpu")
dtype = torch.bfloat16 if torch.cuda.is_available() else torch.float32

transformer = FluxTransformer2DConditionalModel.from_pretrained(
    CHECKPOINT,
    subfolder="transformer",
    torch_dtype=dtype,
    low_cpu_mem_usage=False,
    ignore_mismatched_sizes=True,
    use_auth_token=os.getenv("HF_TOKEN"),
)
pipe = FluxConditionalPipeline.from_pretrained(
    "black-forest-labs/FLUX.1-dev",
    transformer=transformer,
    torch_dtype=dtype,
    use_auth_token=os.getenv("HF_TOKEN"),
)
pipe.load_lora_weights(
    CHECKPOINT,
    weight_name="pytorch_lora_weights.safetensors",
    use_auth_token=os.getenv("HF_TOKEN"),
)
pipe.to(device, dtype=dtype)

@spaces.GPU
def generate_image(
    image: Image.Image,
    text: str,
    gemini_prompt: bool = True,
    guidance: float = 3.5,
    i_guidance: float = 1.0,
    t_guidance: float = 1.0
):
    w, h, min_size = image.size[0], image.size[1], min(image.size)
    image = image.crop(
        ((w - min_size) // 2, (h - min_size) // 2, (w + min_size) // 2, (h + min_size) // 2)
    ).resize((512, 512))

    control_image = load_image(image)
    result_image = pipe(
        prompt=text.strip(),
        negative_prompt="",
        num_inference_steps=28,
        height=512,
        width=1024,
        guidance_scale=guidance,
        image=control_image,
        guidance_scale_real_i=i_guidance,
        guidance_scale_real_t=t_guidance,
        gemini_prompt=gemini_prompt,
    ).images[0]

    return result_image


def get_samples():
    sample_list = [
        {
            "image": "assets/wanrong_character.png",
            "text": "A chibi-style girl with pink hair, green eyes, wearing a black and gold ornate dress, dancing gracefully in a flower garden, anime art style with clean and detailed lines.",
            "gemini_prompt": True,
            "guidance": 3.5,
            "i_guidance": 1.0,
            "t_guidance": 1.0,
        },
        {
            "image": "assets/ben_character_squared.png",
            "text": "A confident green-eye young woman with platinum blonde hair in a high ponytail, wearing an oversized orange jacket and black pants, is striking a dynamic pose, anime-style with sharp details and vibrant colors.",
            "gemini_prompt": True,
            "guidance": 3.5,
            "i_guidance": 1.0,
            "t_guidance": 1.0,
        },
        {
            "image": "assets/seededit_example.png",
            "text": "an adorable small creature with big round orange eyes, fluffy brown fur, wearing a blue scarf with a golden charm, sitting atop a towering stack of colorful books in the middle of a vibrant futuristic city street with towering buildings and glowing neon signs, soft daylight illuminating the scene, detailed and whimsical 3D style.",
            "gemini_prompt": True,
            "guidance": 3.5,
            "i_guidance": 1.0,
            "t_guidance": 1.0,
        },
        {
            "image": "assets/action_hero_figure.jpeg",
            "text": "A cartoonish muscular action hero figure with long blue hair and red headband sits on a crowded sidewalk on a Christmas evening, covered in snow and wearing a Christmas hat, holding a sign that reads 'DSD!', dramatic cinematic lighting, close-up view, 3D-rendered in a stylized, vibrant art style.",
            "gemini_prompt": True,
            "guidance": 3.5,
            "i_guidance": 1.0,
            "t_guidance": 1.0,
        },
        {
            "image": "assets/anime_soldier.jpeg",
            "text": "An adorable cartoon goat soldier sits under a beach umbrella with 'DSD!' written on it, bright teal background with soft lighting, 3D-rendered in a playful and vibrant art style.",
            "gemini_prompt": True,
            "guidance": 3.5,
            "i_guidance": 1.0,
            "t_guidance": 1.0,
        },
        {
            "image": "assets/goat_logo.jpeg",
            "text": "A shirt with this logo on it.",
            "gemini_prompt": True,
            "guidance": 3.5,
            "i_guidance": 1.0,
            "t_guidance": 1.0,
        },
        {
            "image": "assets/cartoon_cat.png",
            "text": "A cheerful cartoon orange cat sits under a beach umbrella with 'DSD!' written on it under a sunny sky, simplistic and humorous comic art style.",
            "gemini_prompt": True,
            "guidance": 3.5,
            "i_guidance": 1.0,
            "t_guidance": 1.0,
        },
    ]
    return [
        [
            Image.open(sample["image"]),
            sample["text"],
            sample["gemini_prompt"],
            sample["guidance"],
            sample["i_guidance"],
            sample["t_guidance"],
        ]
        for sample in sample_list
    ]


demo = gr.Blocks()

with demo:
    gr.Markdown(
        f"""
        <div align="center">

        ## Diffusion Self-Distillation (beta)

        <a href="https://primecai.github.io/dsd/" target="_blank"><img src="https://img.shields.io/badge/Project-Website-blue" style="display:inline-block;"></a>
        <a href="https://github.com/primecai/diffusion-self-distillation" target="_blank"><img src="https://img.shields.io/github/stars/primecai/diffusion-self-distillation?label=GitHub%20%E2%98%85&logo=github&color=C8C" style="display:inline-block;"></a>
        <a href="https://huggingface.co./papers/2411.18616" target="_blank"><img src="https://img.shields.io/badge/%F0%9F%A4%97%20Hugging%20Face%20-Space-yellow" style="display:inline-block;"></a>
        <a href="https://x.com/prime_cai?lang=en" target="_blank"><img src="https://shields.io/twitter/follow/:?label=Subscribe%20for%20updates!" style="display:inline-block;"></a>

        </div>
        """
    )

    iface = gr.Interface(
        fn=generate_image,
        inputs=[
            gr.Image(type="pil"),
            gr.Textbox(lines=2, label="text", info="Could be something as simple as 'this character playing soccer'."),
            gr.Checkbox(label="Gemini prompt", value=True, info="Use Gemini to enhance the prompt. This is recommended for most cases, unless you have a specific prompt similar to the examples in mind."),
            gr.Slider(minimum=1.0, maximum=6.0, step=0.5, value=3.5, label="guidance scale (tip: start with 3.5, then gradually increase if the consistency is consistently off)"),
            gr.Slider(minimum=1.0, maximum=2.0, step=0.05, value=1.0, label="real guidance scale for image (tip: increase if the image is not consistent)"),
            gr.Slider(minimum=1.0, maximum=2.0, step=0.05, value=1.0, label="real guidance scale for prompt (tip: increase if the prompt is not consistent)"),
        ],
        outputs=gr.Image(type="pil"),
        examples=get_samples(),
    )

if __name__ == "__main__":
    demo.launch(debug=False, ssr_mode=False, share=True)