app.py

import gradio as gr
from PIL import Image  
import torch

from diffusers import StableDiffusionPipeline
from free_lunch_utils import register_free_upblock2d, register_free_crossattn_upblock2d



model_id = "stabilityai/stable-diffusion-2-1"
# model_id = "./stable-diffusion-2-1"
pip_2_1 = StableDiffusionPipeline.from_pretrained(model_id, torch_dtype=torch.float16)
pip_2_1 = pip_2_1.to("cuda")

prompt_prev = None
sd_options_prev = None
seed_prev = None 
sd_image_prev = None

def infer(prompt, sd_options, seed, b1, b2, s1, s2):
    global prompt_prev
    global sd_options_prev
    global seed_prev
    global sd_image_prev

    # if sd_options == 'SD1.5':
    #     pip = pip_1_5
    # elif sd_options == 'SD2.1':
    #     pip = pip_2_1
    # else:
    #     pip = pip_1_4

    pip = pip_2_1

    run_baseline = False
    if prompt != prompt_prev or sd_options != sd_options_prev or seed != seed_prev:
        run_baseline = True
        prompt_prev = prompt
        sd_options_prev = sd_options
        seed_prev = seed

    if run_baseline:
        register_free_upblock2d(pip, b1=1.0, b2=1.0, s1=1.0, s2=1.0)
        register_free_crossattn_upblock2d(pip, b1=1.0, b2=1.0, s1=1.0, s2=1.0)
       
        torch.manual_seed(seed)
        print("Generating SD:")
        sd_image = pip(prompt, num_inference_steps=25).images[0]  
        sd_image_prev = sd_image
    else:
        sd_image = sd_image_prev

    
    register_free_upblock2d(pip, b1=b1, b2=b2, s1=s1, s2=s1)
    register_free_crossattn_upblock2d(pip, b1=b1, b2=b2, s1=s1, s2=s1)

    torch.manual_seed(seed)
    print("Generating FreeU:")
    freeu_image = pip(prompt, num_inference_steps=25).images[0]  

    # First SD, then freeu
    images = [sd_image, freeu_image]

    return images


examples = [
    [
        "A small cabin on top of a snowy mountain in the style of Disney, artstation",
    ],
    [
        "half human half cat, a human cat hybrid",
    ],
    [
        "a drone flying over a snowy forest."
    ],
]
    
    
css = """
h1 {
  text-align: center;
}

#component-0 {
  max-width: 730px;
  margin: auto;
}
"""

block = gr.Blocks(css='style.css')

options = ['SD2.1']

with block:
    gr.Markdown("SD vs. FreeU.")
    with gr.Group():
        with gr.Row(): 
            sd_options = gr.Dropdown(["SD2.1"], label="SD options")
            
            with gr.Column():
                with gr.Row(elem_id="prompt-container").style(mobile_collapse=False, equal_height=True):
                    with gr.Column():
                        text = gr.Textbox(
                            label="Enter your prompt",
                            show_label=False,
                            max_lines=1,
                            placeholder="Enter your prompt",
                            container=False,
                        )
                    btn = gr.Button("Generate image", scale=0)
                
                seed = gr.Slider(label='seed',
                                        minimum=0,
                                        maximum=1000,
                                        step=1,
                                        value=42)

    
    with gr.Group():
        with gr.Row():
            with gr.Accordion('FreeU Parameters: b', open=True):
                b1 = gr.Slider(label='b1: backbone factor of the first stage block of decoder',
                                        minimum=1,
                                        maximum=1.6,
                                        step=0.01,
                                        value=1.1)
                b2 = gr.Slider(label='b2: backbone factor of the second stage block of decoder',
                                        minimum=1,
                                        maximum=1.6,
                                        step=0.01,
                                        value=1.2)
            with gr.Accordion('FreeU Parameters: s', open=True):
                s1 = gr.Slider(label='s1: skip factor of the first stage block of decoder',
                                        minimum=0,
                                        maximum=1,
                                        step=0.1,
                                        value=0.9)
                s2 = gr.Slider(label='s2: skip factor of the second stage block of decoder',
                                        minimum=0,
                                        maximum=1,
                                        step=0.1,
                                        value=0.2)    
                    
    with gr.Row():
        with gr.Group():
            # btn = gr.Button("Generate image", scale=0)
            with gr.Row():
                with gr.Column() as c1:
                    image_1 = gr.Image(interactive=False)
                    image_1_label = gr.Markdown("SD")
            
        with gr.Group():
            # btn = gr.Button("Generate image", scale=0)
            with gr.Row():
                with gr.Column() as c2:
                    image_2 = gr.Image(interactive=False)
                    image_2_label = gr.Markdown("FreeU")
        
        
    ex = gr.Examples(examples=examples, fn=infer, inputs=[text, sd_options, seed, b1, b2, s1, s2], outputs=[image_1, image_2], cache_examples=False)
    ex.dataset.headers = [""]

    text.submit(infer, inputs=[text, sd_options, seed, b1, b2, s1, s2], outputs=[image_1, image_2])
    btn.click(infer, inputs=[text, sd_options, seed, b1, b2, s1, s2], outputs=[image_1, image_2])

block.launch()
# block.queue(default_enabled=False).launch(share=False)