app.py

import gradio as gr
from diffusers import StableDiffusionPipeline
import torch
from PIL import Image

# Load a lightweight diffusion model that works on CPU
model_id = "OFA-Sys/small-stable-diffusion-v0"  # A smaller model that works better on CPU

# Create pipeline (will use CPU by default when CUDA isn't available)
pipe = StableDiffusionPipeline.from_pretrained(model_id)
pipe = pipe.to("cpu")  # Explicitly move to CPU

def generate_image(prompt):
    """Generate image from text prompt"""
    try:
        # Generate image
        result = pipe(prompt)
        
        # Get the image
        image = result.images[0]
        
        return image
    except Exception as e:
        # Return a black image with error message if generation fails
        error_img = Image.new('RGB', (300, 200), color='red')
        return error_img

# Create Gradio interface
with gr.Blocks(title="Text to Image Generator") as demo:
    gr.Markdown("# 🎨 Text to Image Generator (CPU)")
    gr.Markdown("Enter a text prompt to generate an image. This runs on CPU so it may be slow.")
    
    with gr.Row():
        with gr.Column():
            prompt_input = gr.Textbox(
                label="Enter your prompt", 
                placeholder="A beautiful sunset over mountains...",
                lines=3
            )
            generate_btn = gr.Button("Generate Image", variant="primary")
        
        with gr.Column():
            output_image = gr.Image(label="Generated Image", type="pil")
    
    # Examples
    gr.Examples(
        examples=[
            ["A cute cat wearing a hat"],
            ["A futuristic city at night"],
            ["A beautiful landscape with mountains and lake"]
        ],
        inputs=prompt_input
    )
    
    # Connect button to function
    generate_btn.click(
        fn=generate_image,
        inputs=prompt_input,
        outputs=output_image
    )

# For running directly as a script
if __name__ == "__main__":
    demo.launch(server_name="0.0.0.0", server_port=7860)