app.py

import gradio as gr
import requests
from PIL import Image
import io
import os
from fal_client import submit

def set_fal_key(api_key):
    os.environ["FAL_KEY"] = api_key
    return "FAL API key set successfully!"

def generate_image(api_key, model, prompt, image_size, num_inference_steps, guidance_scale, num_images, safety_tolerance, enable_safety_checker, seed):
    set_fal_key(api_key)
    
    arguments = {
        "prompt": prompt,
        "image_size": image_size,
        "num_inference_steps": num_inference_steps,
        "num_images": num_images,
    }

    if model == "Flux Pro":
        arguments["guidance_scale"] = guidance_scale
        arguments["safety_tolerance"] = safety_tolerance
        fal_model = "fal-ai/flux-pro"
    elif model == "Flux Dev":
        arguments["guidance_scale"] = guidance_scale
        arguments["enable_safety_checker"] = enable_safety_checker
        fal_model = "fal-ai/flux/dev"
    else:  # Flux Schnell
        arguments["enable_safety_checker"] = enable_safety_checker
        fal_model = "fal-ai/flux/schnell"

    if seed != -1:
        arguments["seed"] = seed

    try:
        handler = submit(fal_model, arguments=arguments)
        result = handler.get()
        images = []
        for img_info in result["images"]:
            img_url = img_info["url"]
            img_response = requests.get(img_url)
            img = Image.open(io.BytesIO(img_response.content))
            images.append(img)
        return images
    except Exception as e:
        return [Image.new('RGB', (512, 512), color='black')]

def update_visible_components(model):
    if model == "Flux Pro":
        return [
            gr.update(visible=True, value=28),
            gr.update(visible=True, value=3.5),
            gr.update(visible=True, value="2"),
            gr.update(visible=False)
        ]
    elif model == "Flux Dev":
        return [
            gr.update(visible=True, value=28),
            gr.update(visible=True, value=3.5),
            gr.update(visible=False),
            gr.update(visible=True, value=True)
        ]
    else:  # Flux Schnell
        return [
            gr.update(visible=True, value=4),
            gr.update(visible=False),
            gr.update(visible=False),
            gr.update(visible=True, value=True)
        ]

with gr.Blocks(theme='bethecloud/storj_theme') as demo:
    gr.HTML("""
    <h1 align="center">FLUX.1 Image Generation</h1>
    <p align="center">
    <a href="https://blackforestlabs.ai/" target="_blank">[Black Forest Labs]</a>
    <a href="https://blackforestlabs.ai/announcing-black-forest-labs/" target="_blank">[Blog]</a>
    <a href="https://fal.ai/models/fal-ai/flux-pro" target="_blank">[FLUX.1 [pro] Model FAL]</a>
    <a href="https://fal.ai/dashboard/keys" target="_blank">[GET YOUR API KEY HERE]</a>
    </p>
    """)

    with gr.Row():
        with gr.Column(scale=1):
            api_key = gr.Textbox(type="password", label="FAL API Key")
            model = gr.Dropdown(
                label="Model",
                choices=["Flux Pro", "Flux Dev", "Flux Schnell"],
                value="Flux Pro"
            )
            prompt = gr.Textbox(label="Prompt", lines=3, placeholder="Add your prompt here")
            image_size = gr.Dropdown(
                choices=["square_hd", "square", "portrait_4_3", "portrait_16_9", "landscape_4_3", "landscape_16_9"],
                label="Image Size",
                value="landscape_4_3"
            )
            
            with gr.Accordion("Advanced settings", open=False):
                num_inference_steps = gr.Slider(1, 100, 28, step=1, label="Number of Inference Steps")
                guidance_scale = gr.Slider(0, 20, 3.5, step=0.1, label="Guidance Scale")
                num_images = gr.Slider(1, 10, 1, step=1, label="Number of Images")
                safety_tolerance = gr.Dropdown(choices=["1", "2", "3", "4", "5", "6"], label="Safety Tolerance", value="2")
                enable_safety_checker = gr.Checkbox(label="Enable Safety Checker", value=True)
                seed = gr.Number(label="Seed", value=-1)

            generate_btn = gr.Button("Generate Image")

        with gr.Column(scale=1):
            output_gallery = gr.Gallery(label="Generated Images", elem_id="gallery", show_label=False)

    model.change(update_visible_components, inputs=[model], outputs=[num_inference_steps, guidance_scale, safety_tolerance, enable_safety_checker])

    generate_btn.click(
        fn=generate_image,
        inputs=[
            api_key, model, prompt, image_size, num_inference_steps,
            guidance_scale, num_images, safety_tolerance, enable_safety_checker, seed
        ],
        outputs=[output_gallery]
    )

demo.launch()