app.py

import gradio as gr
import requests
import io
import os
import logging
from PIL import Image
from image_processing import downscale_image, limit_colors, convert_to_grayscale, convert_to_black_and_white, resize_image, DITHER_METHODS, QUANTIZATION_METHODS
import json 
import time 

# Configuração de log
logging.basicConfig(level=logging.DEBUG)

class SomeClass:
    def __init__(self):
        self.images = []

with open('loras.json', 'r') as f:
    loras = json.load(f)

def update_selection(selected_state: gr.SelectData):
    logging.debug(f"Inside update_selection, selected_state: {selected_state}")
    logging.debug(f"Content of selected_state: {vars(selected_state)}")  # Log the content
    selected_lora_index = selected_state.index
    selected_lora = loras[selected_lora_index]
    new_placeholder = f"Type a prompt for {selected_lora['title']}"
    lora_repo = selected_lora["repo"]
    updated_text = f"### Selected: [{lora_repo}](https://huggingface.co/{lora_repo}) ✨"
    return (
        gr.update(placeholder=new_placeholder),
        updated_text,
        selected_state
    )

def run_lora(prompt, selected_state, progress=gr.Progress(track_tqdm=True)):
    logging.debug(f"Inside run_lora, selected_state: {selected_state}")
    logging.debug(f"Content of selected_state in run_lora: {vars(selected_state)}")
    
    if not selected_state:
        logging.error("selected_state is None or empty. Make sure a LoRA is selected.")
        raise gr.Error("You must select a LoRA before proceeding.")
    
    token = os.getenv("API_TOKEN")
    if not token:
        logging.error("API_TOKEN is not set.")
        raise gr.Error("API_TOKEN is not set.")
    
    selected_lora_index = selected_state.index
    selected_lora = loras[selected_lora_index]
    api_url = f"https://api-inference.huggingface.co/models/{selected_lora['repo']}"
    trigger_word = selected_lora["trigger_word"]
    payload = {
        "inputs": f"{prompt} {trigger_word}",
        "parameters": {"negative_prompt": "bad art, ugly, watermark, deformed"},
    }
    headers = {"Authorization": f"Bearer {token}"}
    
    logging.debug(f"API Request: {api_url}")
    logging.debug(f"API Payload: {payload}")

    error_count = 0
    while True:
        response = requests.post(api_url, json=payload, headers=headers)
        if response.status_code == 200:
            return Image.open(io.BytesIO(response.content))
        elif response.status_code == 503:
            time.sleep(1)
        elif response.status_code == 500 and error_count < 5:
            logging.error(response.content)
            time.sleep(1)
            error_count += 1
        else:
            logging.error(f"Unexpected API Error: {response.status_code}")
            raise gr.Error(f"Unexpected API Error: {response.status_code}")


def postprocess(
    image, 
    enabled,
    downscale,
    need_rescale,
    enable_color_limit,
    number_of_colors,
    quantization_method,
    dither_method,
    use_k_means,
    is_grayscale,
    number_of_shades,
    quantization_method_grayscale,
    dither_method_grayscale,
    use_k_means_grayscale,
    is_black_and_white,
    is_inversed_black_and_white,
    black_and_white_threshold,
    use_color_palette,
    palette_image,
    palette_colors,
    dither_method_palette
):
    logging.debug(f"Available keys in QUANTIZATION_METHODS: {QUANTIZATION_METHODS.keys()}")
    logging.debug(f"Selected quantization_method: {quantization_method}")
    if not enabled:
        return image

    processed_image = image.copy()

    if downscale > 1:
        processed_image = downscale_image(processed_image, downscale)

    if enable_color_limit:
        processed_image = limit_colors(
            image=processed_image,
            limit=number_of_colors,
            quantize=QUANTIZATION_METHODS[quantization_method.capitalize()],
            dither=DITHER_METHODS[dither_method],
            use_k_means=use_k_means
        )

    if is_grayscale:
        processed_image = convert_to_grayscale(processed_image)
        processed_image = limit_colors(
            image=processed_image,
            limit=number_of_shades,
            quantize=QUANTIZATION_METHODS[quantization_method_grayscale.capitalize()],
            dither=DITHER_METHODS[dither_method_grayscale],
            use_k_means=use_k_means_grayscale
        )

    if is_black_and_white:
        processed_image = convert_to_black_and_white(processed_image, black_and_white_threshold, is_inversed_black_and_white)

    if use_color_palette:
        processed_image = limit_colors(
            image=processed_image,
            palette=palette_image,
            palette_colors=palette_colors,
            dither=DITHER_METHODS[dither_method_palette]
        )

    if need_rescale:
        processed_image = resize_image(processed_image, image.size)

    return processed_image

def run_and_postprocess(prompt, selected_state, enabled, downscale, need_rescale, enable_color_limit, palette_size_color, quantization_methods_color, dither_methods_color, k_means_color, enable_grayscale, palette_size_gray, quantization_methods_gray, dither_methods_gray, k_means_gray, enable_black_and_white, inverse_black_and_white, threshold_black_and_white, enable_custom_palette, palette_image, palette_size_custom, dither_methods_custom):
    # Debug: Starting the function
    logging.debug("Starting run_and_postprocess function.")
    # Run the original image generation
    original_image = run_lora(prompt, selected_state)
    
    # Debug: Confirming that the original image was generated
    logging.debug("Original image generated.")
    
    # Post-process the image based on user input
    processed_image = postprocess(
        original_image, 
        enabled, 
        downscale, 
        need_rescale, 
        enable_color_limit, 
        palette_size_color, 
        quantization_methods_color, 
        dither_methods_color, 
        k_means_color, 
        enable_grayscale, 
        palette_size_gray, 
        quantization_methods_gray, 
        dither_methods_gray, 
        k_means_gray, 
        enable_black_and_white, 
        inverse_black_and_white, 
        threshold_black_and_white, 
        enable_custom_palette, 
        palette_image, 
        palette_size_custom, 
        dither_methods_custom
    )
    
    # Debug: Confirming that post-processing was applied
    if enabled:
        logging.debug("Post-processing applied.")
    else:
        logging.debug("Post-processing not applied.")
    
    return processed_image if enabled else original_image
        
with gr.Blocks() as app:
    title = gr.Markdown("# PIXEL ART GENERATOR")
    description = gr.Markdown("### This tool was developed by [@artificialguybr](https://twitter.com/artificialguybr). Generate Pixel Art using Lora from [@artificialguybr](https://twitter.com/artificialguybr) and [@nerijs](https://twitter.com/nerijs)".)
    selected_state = gr.State()
    
    with gr.Row():
        gallery = gr.Gallery([(item["image"], item["title"]) for item in loras], label="LoRA Gallery", allow_preview=False, columns=1)
        
        with gr.Column():
            prompt_title = gr.Markdown("### Click on a LoRA in the gallery to create with it")
            selected_info = gr.Markdown("")
            
            with gr.Row():
                prompt = gr.Textbox(label="Prompt", show_label=False, lines=1, max_lines=1, placeholder="Type a prompt after selecting a LoRA")
                button = gr.Button("Run")
            
            result = gr.Image(interactive=False, label="Generated Image")
    # Accordion moved here, inside the same gr.Blocks context
    with gr.Accordion(label="Pixel art", open=True):
        with gr.Row():
            enabled = gr.Checkbox(label="Enable", value=False)
            downscale = gr.Slider(label="Downscale", minimum=1, maximum=32, step=2, value=8)
            need_rescale = gr.Checkbox(label="Rescale to original size", value=True)
        with gr.Tabs():
            with gr.TabItem("Color"):
                enable_color_limit = gr.Checkbox(label="Enable", value=False)
                palette_size_color = gr.Slider(label="Palette Size", minimum=1, maximum=256, step=1, value=16)
                quantization_methods_color = gr.Radio(choices=["Median Cut", "Maximum Coverage", "Fast Octree"], label="Colors Quantization Method", value="Median Cut")
                dither_methods_color = gr.Radio(choices=["None", "Floyd-Steinberg"], label="Colors Dither Method", value="None")
                k_means_color = gr.Checkbox(label="Enable k-means for color quantization", value=True)
            
            with gr.TabItem("Grayscale"):
                enable_grayscale = gr.Checkbox(label="Enable", value=False)
                palette_size_gray = gr.Slider(label="Palette Size", minimum=1, maximum=256, step=1, value=16)
                quantization_methods_gray = gr.Radio(choices=["Median Cut", "Maximum Coverage", "Fast Octree"], label="Colors Quantization Method", value="Median Cut")
                dither_methods_gray = gr.Radio(choices=["None", "Floyd-Steinberg"], label="Colors Dither Method", value="None")
                k_means_gray = gr.Checkbox(label="Enable k-means for color quantization", value=True)
            
            with gr.TabItem("Black and white"):
                enable_black_and_white = gr.Checkbox(label="Enable", value=False)
                inverse_black_and_white = gr.Checkbox(label="Inverse", value=False)
                threshold_black_and_white = gr.Slider(label="Threshold", minimum=1, maximum=256, step=1, value=128)
            
            with gr.TabItem("Custom color palette"):
                enable_custom_palette = gr.Checkbox(label="Enable", value=False)
                palette_image = gr.Image(label="Color palette image", type="pil")
                palette_size_custom = gr.Slider(label="Palette Size", minimum=1, maximum=256, step=1, value=16)
                dither_methods_custom = gr.Radio(choices=["None", "Floyd-Steinberg"], label="Colors Dither Method", value="None")

    # The rest of your code for setting up the app
    gallery.select(update_selection, outputs=[prompt, selected_info, selected_state])
    prompt.submit(fn=run_lora, inputs=[prompt, selected_state], outputs=[result])
    button.click(
    fn=run_and_postprocess, 
    inputs=[
        prompt, 
        selected_state, 
        enabled, 
        downscale, 
        need_rescale, 
        enable_color_limit, 
        palette_size_color, 
        quantization_methods_color, 
        dither_methods_color, 
        k_means_color, 
        enable_grayscale, 
        palette_size_gray, 
        quantization_methods_gray, 
        dither_methods_gray, 
        k_means_gray, 
        enable_black_and_white, 
        inverse_black_and_white, 
        threshold_black_and_white, 
        enable_custom_palette, 
        palette_image, 
        palette_size_custom, 
        dither_methods_custom
    ], 
    outputs=[result]
)
    
    app.queue(max_size=20, concurrency_count=5)
    app.launch()