app.py

import gradio as gr
from PIL import Image
import tempfile

def upscale(image, scale):
    width, height = image.size
    new_width = int(width * scale)
    new_height = int(height * scale)
    upscaled = image.resize((new_width, new_height), Image.BICUBIC)

    # Save to a temp JPG file
    temp_file = tempfile.NamedTemporaryFile(suffix=".jpg", delete=False)
    upscaled.convert("RGB").save(temp_file.name, format="JPEG", quality=95)
    return temp_file.name

title = "Simple Image Upscaler (JPG Download)"
description = "Upload an image and choose scale (2x, 4x, 8x). The image will be resized and downloaded as JPG."

interface = gr.Interface(
    fn=upscale,
    inputs=[
        gr.Image(type="pil"),
        gr.Slider(2, 8, step=2, label="Upscale Factor (2x to 8x)")
    ],
    outputs=gr.File(label="Download Upscaled JPG"),
    title=title,
    description=description
)

interface.launch()