app.py

import gradio as gr
import requests
import qrcode
import io
from PIL import Image

import os

# Get the Hugging Face API token from the environment variable
hf_token = os.environ.get("hf_token")

# Function to generate a QR code with transparent fill color
def generate_qr_image(url, image_size):
    qr = qrcode.QRCode(
        version=1,
        error_correction=qrcode.constants.ERROR_CORRECT_L,
        box_size=60,  # Set a default box size
        border=0.5,  # Set a default border size
    )
    qr.add_data(url)
    qr.make(fit=True)

    qr_img = qr.make_image(fill_color="black", back_color="white").convert("RGBA")

    # Convert black color pixels to transparent
    data = qr_img.getdata()
    new_data = []
    for item in data:
        if item[:3] == (0, 0, 0):  # Change black pixels to transparent
            new_data.append((0, 0, 0, 0))
        else:
            new_data.append(item)
    qr_img.putdata(new_data)

    qr_img = qr_img.resize(image_size)

    return qr_img

# Function to query the image from the Hugging Face API
def query_image(text):
    API_URL = "https://api-inference.huggingface.co/models/goofyai/3d_render_style_xl"
    headers = {"Authorization": f"Bearer {hf_token}"}

    response = requests.post(API_URL, headers=headers, json={"inputs": text})
    return response.content

# Gradio app function
def generate_image(url, text):
    # Generate image from Hugging Face API
    image_bytes = query_image(text)
    api_image = Image.open(io.BytesIO(image_bytes))

    # Generate QR code image
    qr_image = generate_qr_image(url, api_image.size)

    # Create a blank image with transparency
    final_image = Image.new('RGBA', api_image.size, (255, 255, 255, 0))

    # Position the QR code in the image
    qr_position = ((final_image.width - qr_image.width) // 2, (final_image.height - qr_image.height) // 2)
    final_image.paste(qr_image, qr_position, qr_image)

    # Composite the API image and the final image with the QR code
    final_image = Image.alpha_composite(api_image.convert("RGBA"), final_image)

    return final_image

# Inputs and outputs for Gradio interface
inputs = [
    gr.Textbox(lines=1, label="URL"),
    gr.Textbox(lines=2, label="Prompt for Image"),
]
output = gr.Image(type="pil", label="Generated Image")

examples = [
    ["https://example.com/1", "A colorful sunset over the ocean"],
    ["https://example.com/2", "A cute puppy playing in the park"],
    ["https://example.com/3", "A green mountains landscape"]
]

# Gradio app interface
gr.Interface(
    fn=generate_image,
    inputs=inputs,
    outputs=output,
    title="QR Code Image Generator ✨",
    description="Generate an image with a transparent QR code linked to the input URL and an image from the Dalle-3 API",
    examples=examples,
    theme="soft",
    cache_examples=False  # Disable example caching
).launch()