app.py

import os
import gc
import uuid
import random
import tempfile
import time
from datetime import datetime
from typing import Any
from huggingface_hub import login, hf_hub_download

import gradio as gr
import numpy as np
import torch
from PIL import Image, ImageDraw, ImageFont
from diffusers import FluxPipeline

# 메모리 정리 함수
def clear_memory():
    gc.collect()
    try:
        if torch.cuda.is_available():
            with torch.cuda.device(0):
                torch.cuda.empty_cache()
    except:
        pass

# GPU 설정
device = torch.device("cuda:0" if torch.cuda.is_available() else "cpu")

if torch.cuda.is_available():
    try:
        with torch.cuda.device(0):
            torch.cuda.empty_cache()
            torch.backends.cudnn.benchmark = True
            torch.backends.cuda.matmul.allow_tf32 = True
    except:
        print("Warning: Could not configure CUDA settings")

# HF 토큰 설정
HF_TOKEN = os.getenv("HF_TOKEN")
if HF_TOKEN is None:
    raise ValueError("Please set the HF_TOKEN environment variable")

try:
    login(token=HF_TOKEN)
except Exception as e:
    raise ValueError(f"Failed to login to Hugging Face: {str(e)}")

# FLUX 파이프라인 초기화
pipe = FluxPipeline.from_pretrained(
    "black-forest-labs/FLUX.1-dev",
    torch_dtype=torch.float16,
    use_auth_token=HF_TOKEN
)
pipe.enable_attention_slicing(slice_size="auto")

# Eric cat LoRA 가중치 로드
try:
    lora_path = hf_hub_download(
        "ginipick/flux-lora-eric-cat",
        "flux-lora-eric-cat.safetensors",
        use_auth_token=HF_TOKEN
    )
    pipe.load_lora_weights(lora_path)
    pipe.fuse_lora(lora_scale=0.125)
except Exception as e:
    print(f"Error loading LoRA weights: {str(e)}")
    raise ValueError("Failed to load LoRA weights. Please check your HF_TOKEN and model access.")

# GPU로 이동
if torch.cuda.is_available():
    try:
        pipe = pipe.to("cuda:0")
    except Exception as e:
        print(f"Warning: Could not move pipeline to CUDA: {str(e)}")

# 저장 디렉토리 설정
SAVE_DIR = "saved_images"
if not os.path.exists(SAVE_DIR):
    os.makedirs(SAVE_DIR, exist_ok=True)

MAX_SEED = np.iinfo(np.int32).max
MAX_IMAGE_SIZE = 1024

def save_generated_image(image, prompt):
    timestamp = datetime.now().strftime("%Y%m%d_%H%M%S")
    unique_id = str(uuid.uuid4())[:8]
    filename = f"{timestamp}_{unique_id}.png"
    filepath = os.path.join(SAVE_DIR, filename)
    image.save(filepath)
    return filepath


@gr.GPU(duration=60)
def generate_image(
    prompt: str,
    seed: int,
    randomize_seed: bool,
    width: int,
    height: int,
    guidance_scale: float,
    num_inference_steps: int,
    progress: gr.Progress = gr.Progress()
):
    try:
        if randomize_seed:
            seed = random.randint(0, MAX_SEED)
        
        generator = torch.Generator(device=device).manual_seed(seed)
        
        with torch.inference_mode():
            image = pipe(
                prompt=prompt,
                width=width,
                height=height,
                num_inference_steps=num_inference_steps,
                guidance_scale=guidance_scale,
                generator=generator,
            ).images[0]
        
        filepath = save_generated_image(image, prompt)
        return image, seed
        
    except Exception as e:
        raise gr.Error(f"Image generation failed: {str(e)}")
    finally:
        clear_memory()

def add_text_with_stroke(draw, text, x, y, font, text_color, stroke_width):
    """텍스트에 외곽선을 추가하는 함수"""
    for adj_x in range(-stroke_width, stroke_width + 1):
        for adj_y in range(-stroke_width, stroke_width + 1):
            draw.text((x + adj_x, y + adj_y), text, font=font, fill=text_color)

def add_text_to_image(
    input_image,
    text,
    font_size,
    color,
    opacity,
    x_position,
    y_position,
    thickness,
    text_position_type,
    font_choice
):
    try:
        if input_image is None or text.strip() == "":
            return input_image

        if not isinstance(input_image, Image.Image):
            if isinstance(input_image, np.ndarray):
                image = Image.fromarray(input_image)
            else:
                raise ValueError("Unsupported image type")
        else:
            image = input_image.copy()

        if image.mode != 'RGBA':
            image = image.convert('RGBA')

        font_files = {
            "Default": "DejaVuSans.ttf",
            "Korean Regular": "ko-Regular.ttf"
        }
        
        try:
            font_file = font_files.get(font_choice, "DejaVuSans.ttf")
            font = ImageFont.truetype(font_file, int(font_size))
        except Exception as e:
            print(f"Font loading error ({font_choice}): {str(e)}")
            font = ImageFont.load_default()
        
        color_map = {
            'White': (255, 255, 255),
            'Black': (0, 0, 0),
            'Red': (255, 0, 0),
            'Green': (0, 255, 0),
            'Blue': (0, 0, 255),
            'Yellow': (255, 255, 0),
            'Purple': (128, 0, 128)
        }
        rgb_color = color_map.get(color, (255, 255, 255))
        
        temp_draw = ImageDraw.Draw(image)
        text_bbox = temp_draw.textbbox((0, 0), text, font=font)
        text_width = text_bbox[2] - text_bbox[0]
        text_height = text_bbox[3] - text_bbox[1]

        actual_x = int((image.width - text_width) * (x_position / 100))
        actual_y = int((image.height - text_height) * (y_position / 100))

        text_color = (*rgb_color, int(opacity))
        
        txt_overlay = Image.new('RGBA', image.size, (255, 255, 255, 0))
        draw = ImageDraw.Draw(txt_overlay)
        
        add_text_with_stroke(
            draw,
            text,
            actual_x,
            actual_y,
            font,
            text_color,
            int(thickness)
        )
        output_image = Image.alpha_composite(image, txt_overlay)
        
        output_image = output_image.convert('RGB')
        
        return output_image

    except Exception as e:
        print(f"Error in add_text_to_image: {str(e)}")
        return input_image    


css = """
footer {display: none}
.main-title {
    text-align: center;
    margin: 1em 0;
    padding: 1.5em;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    border-radius: 15px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}
.main-title h1 {
    color: #2196F3;
    font-size: 2.8em;
    margin-bottom: 0.3em;
    font-weight: 700;
}
.main-title p {
    color: #555;
    font-size: 1.3em;
    line-height: 1.4;
}
.container {
    max-width: 1200px;
    margin: auto;
    padding: 20px;
}
.input-panel, .output-panel {
    background: white;
    padding: 1.5em;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    margin-bottom: 1em;
}
"""

with gr.Blocks(theme=gr.themes.Soft(), css=css) as demo:
    gr.HTML("""
        <div class="main-title">
            <h1>🎨 Webtoon Canvas</h1>
            <p>Generate webtoon-style images and add text with various styles and positions.</p>
        </div>
    """)

    with gr.Row():
        with gr.Column(scale=1):
            # 이미지 생성 섹션
            gen_prompt = gr.Textbox(
                label="Generation Prompt",
                placeholder="Enter your image generation prompt..."
            )
            with gr.Row():
                gen_width = gr.Slider(512, 1024, 768, step=64, label="Width")
                gen_height = gr.Slider(512, 1024, 768, step=64, label="Height")
            
            with gr.Row():
                guidance_scale = gr.Slider(1, 20, 7.5, step=0.5, label="Guidance Scale")
                num_steps = gr.Slider(1, 50, 30, step=1, label="Number of Steps")
            
            with gr.Row():
                seed = gr.Number(label="Seed", value=-1)
                randomize_seed = gr.Checkbox(label="Randomize Seed", value=True)
            
            generate_btn = gr.Button("Generate Image", variant="primary")
            
            output_image = gr.Image(
                label="Generated Image",
                type="pil",
                show_download_button=True
            )
            output_seed = gr.Number(label="Used Seed", interactive=False)

            # 텍스트 추가 섹션
            with gr.Accordion("Text Options", open=False):
                text_input = gr.Textbox(
                    label="Text Content",
                    placeholder="Enter text to add..."
                )
                with gr.Row():
                    font_choice = gr.Dropdown(
                        choices=["Default", "Korean Regular"],
                        value="Default",
                        label="Font Selection",
                        interactive=True
                    )
                    font_size = gr.Slider(
                        minimum=10,
                        maximum=200,
                        value=40,
                        step=5,
                        label="Font Size"
                    )
                with gr.Row():
                    color_dropdown = gr.Dropdown(
                        choices=["White", "Black", "Red", "Green", "Blue", "Yellow", "Purple"],
                        value="White",
                        label="Text Color"
                    )
                    thickness = gr.Slider(
                        minimum=0,
                        maximum=10,
                        value=1,
                        step=1,
                        label="Text Thickness"
                    )
                with gr.Row():
                    opacity_slider = gr.Slider(
                        minimum=0,
                        maximum=255,
                        value=255,
                        step=1,
                        label="Opacity"
                    )
                with gr.Row():
                    x_position = gr.Slider(
                        minimum=0,
                        maximum=100,
                        value=50,
                        step=1,
                        label="Left(0%)~Right(100%)"
                    )
                    y_position = gr.Slider(
                        minimum=0,
                        maximum=100,
                        value=50,
                        step=1,
                        label="High(0%)~Low(100%)"
                    )
                add_text_btn = gr.Button("Apply Text", variant="primary")

    # 이벤트 바인딩
    generate_btn.click(
        fn=generate_image,
        inputs=[
            gen_prompt,
            seed,
            randomize_seed,
            gen_width,
            gen_height,
            guidance_scale,
            num_steps,
        ],
        outputs=[output_image, output_seed]
    )

    add_text_btn.click(
        fn=add_text_to_image,
        inputs=[
            output_image,
            text_input,
            font_size,
            color_dropdown,
            opacity_slider,
            x_position,
            y_position,
            thickness,
            "Text Over Image",  # text_position_type 고정
            font_choice
        ],
        outputs=output_image
    )

demo.queue(max_size=5)
demo.launch(
    server_name="0.0.0.0",
    server_port=7860,
    share=False,
    max_threads=2
)