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FLUXPro
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import gradio as gr
import numpy as np
import random
import spaces
import torch
import time
from diffusers import DiffusionPipeline
from custom_pipeline import FLUXPipelineWithIntermediateOutputs

# Constants
MAX_SEED = np.iinfo(np.int32).max
MAX_IMAGE_SIZE = 2048
DEFAULT_WIDTH = 1024
DEFAULT_HEIGHT = 1024
DEFAULT_INFERENCE_STEPS = 1

# Device and model setup
dtype = torch.float16
pipe = FLUXPipelineWithIntermediateOutputs.from_pretrained(
    "black-forest-labs/FLUX.1-schnell", torch_dtype=dtype
).to("cuda")
torch.cuda.empty_cache()

# Inference function
@spaces.GPU(duration=25)
def generate_image(prompt, seed=42, width=DEFAULT_WIDTH, height=DEFAULT_HEIGHT, randomize_seed=False, num_inference_steps=2):
    
    if randomize_seed:
        seed = random.randint(0, MAX_SEED)
    generator = torch.Generator().manual_seed(seed)

    start_time = time.time()

    # Only generate the last image in the sequence
    for img in pipe.generate_images(  
            prompt=prompt,
            guidance_scale=0,
            num_inference_steps=num_inference_steps,
            width=width,
            height=height,
            generator=generator
        ): 
        latency = f"Latency: {(time.time()-start_time):.2f} seconds"    
        yield img, seed, latency


# Example prompts
examples = [
    "a tiny astronaut hatching from an egg on the moon",
    "a cat holding a sign that says hello world",
    "an anime illustration of a wiener schnitzel",
    "a cute robot artist painting on an easel, concept art",
    "Imagine steve jobs as Star Wars movie character",
    "Photo of a young woman with long, wavy brown hair tied in a bun and glasses. She has a fair complexion and is wearing subtle makeup, emphasizing her eyes and lips. She is dressed in a black top. The background appears to be an urban setting with a building facade, and the sunlight casts a warm glow on her face.",
]

# --- Gradio UI ---
with gr.Blocks() as demo:
    with gr.Column(elem_id="app-container"):
        gr.Markdown("# 🎨 Realtime FLUX Image Generator")
        gr.Markdown("Generate stunning images in real-time with advanced AI technology.")
        gr.Markdown("<span style='color: red;'>Note: Sometimes it stucks or stops generating images (I don't know why). In that situation just refresh the site.</span>")

        with gr.Row():
            with gr.Column(scale=3):
                result = gr.Image(label="Generated Image", show_label=False, interactive=False)
            with gr.Column(scale=1):
                prompt = gr.Text(
                    label="Prompt",
                    placeholder="Describe the image you want to generate...",
                    lines=3,
                    show_label=False,
                    container=False,
                )
                enhanceBtn = gr.Button("🚀 Enhance Image")

                with gr.Column("Advanced Options"):
                    with gr.Row():
                        latency = gr.Text(show_label=False)
                    with gr.Row():
                        seed = gr.Number(label="Seed", value=42, precision=0)
                        randomize_seed = gr.Checkbox(label="Randomize Seed", value=False)
                    with gr.Row():
                        width = gr.Slider(label="Width", minimum=256, maximum=MAX_IMAGE_SIZE, step=32, value=DEFAULT_WIDTH)
                        height = gr.Slider(label="Height", minimum=256, maximum=MAX_IMAGE_SIZE, step=32, value=DEFAULT_HEIGHT)
                        num_inference_steps = gr.Slider(label="Inference Steps", minimum=1, maximum=4, step=1, value=DEFAULT_INFERENCE_STEPS)

        with gr.Row():
            gr.Markdown("### 🌟 Inspiration Gallery")
        with gr.Row():
            gr.Examples(
                examples=examples,
                fn=generate_image,
                inputs=[prompt],
                outputs=[result, seed],
                cache_examples="lazy" 
            )

    # Event handling - Trigger image generation on button click or input change
    enhanceBtn.click(
        fn=generate_image,
        inputs=[prompt, seed, width, height],
        outputs=[result, seed, latency],
        show_progress="hidden",
        show_api=False,
        queue=False
    )

    gr.on(
        triggers=[prompt.submit, prompt.input, width.input, height.input, num_inference_steps.input],
        fn=generate_image,
        inputs=[prompt, seed, width, height, randomize_seed, num_inference_steps],
        outputs=[result, seed, latency],
        show_progress="hidden",
        show_api=False,
        trigger_mode="always_last",
        queue=False
    )

# Launch the app
demo.launch()