125 lines
4.5 KiB
Python
125 lines
4.5 KiB
Python
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#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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"""
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Collage风格（拼图风格）海报模板
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"""
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import logging
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import random
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from typing import List, Tuple, Optional
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from PIL import Image, ImageDraw
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from .base_template import BaseTemplate
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logger = logging.getLogger(__name__)
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class CollageTemplate(BaseTemplate):
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"""
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拼图风格模板，用于将多张图片组合成一张海报。
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支持多种布局样式，如网格、非对称、电影胶片等。
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"""
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def generate(self,
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image_paths: List[str],
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style: str = 'grid_2x2',
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**kwargs) -> Image.Image:
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"""
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生成拼图海报
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Args:
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image_paths (List[str]): 用于制作拼图的图片路径列表
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style (str): 拼图样式 (例如 'grid_2x2', 'asymmetric', 'filmstrip')
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Returns:
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Image.Image: 生成的拼图海报图像
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"""
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if not self._validate_inputs(['image_paths'], image_paths=image_paths):
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return None
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if not image_paths:
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logger.error("生成拼图失败: 图片列表不能为空。")
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return None
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images = [self.image_processor.load_image(p) for p in image_paths if p]
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images = [img for img in images if img] # 过滤掉加载失败的图片
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if not images:
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logger.error("所有图片都加载失败。")
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return None
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# 根据样式选择对应的私有方法
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style_method_name = f"_create_{style}_collage"
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style_method = getattr(self, style_method_name, self._create_grid_2x2_collage)
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logger.info(f"使用 '{style}' 风格创建拼图...")
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return style_method(images, self.size)
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def _resize_and_crop(self, img, target_size):
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"""辅助方法：调整并裁剪图片以适应目标尺寸"""
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return self.image_processor.resize_and_crop(img, target_size)
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# --- 各种拼图样式的实现 ---
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def _create_grid_2x2_collage(self, images: List[Image.Image], target_size: Tuple[int, int]) -> Image.Image:
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"""创建 2x2 网格拼图"""
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if len(images) < 4:
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logger.warning(f"2x2网格需要4张图，但只提供了{len(images)}张。将使用重复图片。")
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images.extend([random.choice(images) for _ in range(4 - len(images))])
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w, h = target_size
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img_w, img_h = w // 2, h // 2
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canvas = self.create_canvas()
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resized_images = [self._resize_and_crop(img, (img_w, img_h)) for img in images[:4]]
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canvas.paste(resized_images[0], (0, 0))
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canvas.paste(resized_images[1], (img_w, 0))
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canvas.paste(resized_images[2], (0, img_h))
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canvas.paste(resized_images[3], (img_w, img_h))
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return canvas
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def _create_asymmetric_collage(self, images: List[Image.Image], target_size: Tuple[int, int]) -> Image.Image:
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"""创建非对称拼图（左一右二）"""
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if len(images) < 3:
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logger.warning(f"非对称拼图需要3张图，将使用重复图片。")
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images.extend([random.choice(images) for _ in range(3 - len(images))])
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w, h = target_size
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main_w = int(w * 0.6)
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side_w = w - main_w
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side_h = h // 2
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canvas = self.create_canvas()
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main_img = self._resize_and_crop(images[0], (main_w, h))
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side_img1 = self._resize_and_crop(images[1], (side_w, side_h))
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side_img2 = self._resize_and_crop(images[2], (side_w, side_h))
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canvas.paste(main_img, (0, 0))
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canvas.paste(side_img1, (main_w, 0))
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canvas.paste(side_img2, (main_w, side_h))
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return canvas
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def _create_filmstrip_collage(self, images: List[Image.Image], target_size: Tuple[int, int]) -> Image.Image:
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"""创建电影胶片风格拼图"""
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num_images = min(len(images), 4) # 最多4张
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w, h = target_size
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padding = 10
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img_h = (h - (num_images + 1) * padding) // num_images
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canvas = self.create_canvas(background_color=(30, 30, 30, 255))
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current_y = padding
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for img in images[:num_images]:
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resized_img = self._resize_and_crop(img, (w - 2 * padding, img_h))
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canvas.paste(resized_img, (padding, current_y))
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current_y += img_h + padding
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return canvas
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def _validate_inputs(self, required_keys: list, **kwargs) -> bool:
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return super()._validate_inputs(required_keys, **kwargs)
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