// 간단한 이미지 버퍼 관리 예시 (의사코드)
class ImageBuffer {
    currentImage = null
    nextImage = null
    imageList = []
    currentIndex = 0
    
    preloadNext() {
        nextIndex = (currentIndex + 1) % imageList.length
        nextImage = loadImage(imageList[nextIndex])
    }
    
    switchToNext() {
        currentImage = nextImage
        currentIndex = (currentIndex + 1) % imageList.length
        preloadNext()
    }
}

// Python으로 구현한 간단한 슬라이드쇼 엔진
import time
from PIL import Image, ImageTk
import tkinter as tk

class SlideShowEngine:
    def __init__(self, image_paths, interval=5):
        self.images = image_paths
        self.interval = interval
        self.current_index = 0
        self.is_running = False
        
    def load_image(self, index):
        """이미지를 로드하고 화면 크기에 맞게 조정"""
        img = Image.open(self.images[index])
        img = img.resize((1920, 1080), Image.LANCZOS)
        return ImageTk.PhotoImage(img)
    
    def fade_transition(self, old_img, new_img, steps=30):
        """페이드 효과 구현"""
        for i in range(steps):
            alpha = i / steps
            # 알파 블렌딩 계산
            blended = self.blend_images(old_img, new_img, alpha)
            self.display(blended)
            time.sleep(0.033)  # 약 30fps
    
    def start(self):
        """슬라이드쇼 시작"""
        self.is_running = True
        while self.is_running:
            current_img = self.load_image(self.current_index)
            next_index = (self.current_index + 1) % len(self.images)
            next_img = self.load_image(next_index)
            
            # 트랜지션 효과 적용
            self.fade_transition(current_img, next_img)
            
            self.current_index = next_index
            time.sleep(self.interval)

# 라즈베리 파이용 간단한 슬라이드쇼 스크립트
import pygame
import os
import time
from PIL import Image

# 초기화
pygame.init()
screen = pygame.display.set_mode((0, 0), pygame.FULLSCREEN)
width, height = screen.get_size()

# 이미지 폴더
image_folder = "/home/pi/Pictures/"
images = [f for f in os.listdir(image_folder) if f.endswith(('.jpg', '.png'))]

def load_and_scale_image(path):
    """이미지를 화면 크기에 맞게 로드"""
    img = Image.open(path)
    img.thumbnail((width, height), Image.LANCZOS)
    
    # PIL 이미지를 Pygame 표면으로 변환
    mode = img.mode
    size = img.size
    data = img.tobytes()
    
    return pygame.image.fromstring(data, size, mode)

# 메인 루프
running = True
current_index = 0

while running:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False
        elif event.type == pygame.KEYDOWN:
            if event.key == pygame.K_ESCAPE:
                running = False
    
    # 현재 이미지 표시
    img_path = os.path.join(image_folder, images[current_index])
    img_surface = load_and_scale_image(img_path)
    
    # 중앙 정렬
    x = (width - img_surface.get_width()) // 2
    y = (height - img_surface.get_height()) // 2
    
    screen.fill((0, 0, 0))  # 검은 배경
    screen.blit(img_surface, (x, y))
    pygame.display.flip()
    
    # 다음 이미지로
    time.sleep(5)  # 5초 대기
    current_index = (current_index + 1) % len(images)

pygame.quit()