app.py

import gradio as gr
from io import BytesIO
import json
import os
from PIL import Image
import requests
import time
import getpass

# Get the API key
STABILITY_API_KEY = os.environ.get('STABILITY_API_KEY')  # Try to get from environment variable

def send_generation_request(
    host,
    params,
):
    headers = {
        "Accept": "image/*",
        "Authorization": f"Bearer {STABILITY_API_KEY}"
    }

    # Encode parameters
    files = {}
    image = params.pop("image", None)
    mask = params.pop("mask", None)
    if image is not None and image != '':
        files["image"] = open(image, 'rb')
    if mask is not None and mask != '':
        files["mask"] = open(mask, 'rb')
    if len(files)==0:
        files["none"] = ''

    # Send request
    print(f"Sending REST request to {host}...")
    response = requests.post(
        host,
        headers=headers,
        files=files,
        data=params
    )
    if not response.ok:
        raise Exception(f"HTTP {response.status_code}: {response.text}")

    return response

def generate_image(prompt, negative_prompt, aspect_ratio, seed, output_format):
    """Generates an image using the SD3 API."""

    host = os.environ["STABILITY_HOST"]

    params = {
        "prompt": prompt,
        "negative_prompt": negative_prompt,
        "aspect_ratio": aspect_ratio,
        "seed": seed,
        "output_format": output_format,
        "model": "sd3-medium",  # You can change the model here
        "mode": "text-to-image"
    }

    response = send_generation_request(host, params)

    # Decode response
    output_image = response.content
    finish_reason = response.headers.get("finish-reason")
    seed = response.headers.get("seed")

    # Check for NSFW classification
    if finish_reason == 'CONTENT_FILTERED':
        raise Warning("Generation failed NSFW classifier")

    # Convert image to PIL format
    image = Image.open(BytesIO(output_image))

    return image

"""
Cost Rule
- SD3 Large: 2B, 6.5 credits each
- SD3 Large Turbo: 8B, 4 credits each
- SD3 Medium: 8B, 3.5 credits each
"""

# Create the Gradio interface
interface = gr.Interface(
    fn=generate_image,
    inputs=[
        gr.Textbox(label="正向提示词", placeholder="This dreamlike digital art captures a vibrant, kaleidoscopic bird in a lush rainforest"),
        gr.Textbox(label="负向提示词", placeholder="Optional"),
        gr.Dropdown(label="长宽比", choices=["21:9", "16:9", "3:2", "5:4", "1:1", "4:5", "2:3", "9:16", "9:21"], value="16:9"),
        gr.Number(label="生成算法随机种子", value=0),
        gr.Dropdown(label="输出格式", choices=["jpeg", "png"], value="png")
    ],
    outputs="image",
    title="Stable Diffusion 3 Image Generator",
    description="Generate images with Stable Diffusion 3. Type a prompt and see the magic!"
)

# Launch the interface
interface.launch(share=True)