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align-your-steps
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from diffusers import StableDiffusionXLPipeline, AutoencoderKL

vae = AutoencoderKL.from_pretrained("madebyollin/sdxl-vae-fp16-fix", torch_dtype=torch.float16)
pipe = StableDiffusionXLPipeline.from_pretrained(
    "stabilityai/stable-diffusion-xl-base-1.0",
    torch_dtype=torch.float16, variant="fp16", use_safetensors=True,
    vae=vae,
    add_watermarker=False,
).to("cuda")

pipe.scheduler = DPMSolverMultistepScheduler.from_config(pipe.scheduler.config)

def run(prompt="a photo of an astronaut riding a horse on mars", steps=10, seed=20, negative_prompt="", randomize_seed=False):
    if randomize_seed:
        seed = random.randint(0, MAX_SEED)
    
    sampling_schedule = [999, 845, 730, 587, 443, 310, 193, 116, 53, 13, 0]
    torch.manual_seed(seed)
    ays_images = pipe(
        prompt,
        negative_prompt=negative_prompt,
        num_images_per_prompt=1,
        timesteps=sampling_schedule,
    ).images
    return ays_images[0], seed

examples = [
    "Astronaut in a jungle, cold color palette, muted colors, detailed, 8k",
    "An astronaut riding a green horse",
    "A delicious ceviche cheesecake slice",
]

css="""
#col-container {
    margin: 0 auto;
    max-width: 520px;
}
"""

with gr.Blocks(css=css) as demo:
    
    with gr.Column(elem_id="col-container"):
        gr.Markdown(f"""
        # Align-your-steps
        Unnoficial demo for the official diffusers implementation of [Align your Steps](https://research.nvidia.com/labs/toronto-ai/AlignYourSteps/) by NVIDIA
        """)
        
        with gr.Row():
            
            prompt = gr.Text(
                label="Prompt",
                show_label=False,
                max_lines=1,
                placeholder="Enter your prompt",
                container=False,
            )
            
            run_button = gr.Button("Run", scale=0)
        
        result = gr.Image(label="Result", show_label=False)

        with gr.Accordion("Advanced Settings", open=False):
            
            negative_prompt = gr.Text(
                label="Negative prompt",
                max_lines=1,
                placeholder="Enter a negative prompt",
                visible=False,
            )
            
            seed = gr.Slider(
                label="Seed",
                minimum=0,
                maximum=MAX_SEED,
                step=1,
                value=0,
            )
            
            randomize_seed = gr.Checkbox(label="Randomize seed", value=True)

            num_inference_steps = gr.Slider(
                label="Number of inference steps",
                minimum=4,
                maximum=12,
                step=1,
                value=8,
            )

    run_button.click(
        fn = infer,
        inputs = [prompt, num_inference_steps, seed, negative_prompt, randomize_seed],
        outputs = [result]
    )