调整了选图逻辑

utils/poster_notes_creator.py

@@ -202,19 +202,32 @@ class PosterNotesCreator:
         logger.info(f"开始为主题 {topic_index} 变体 {variant_index} 选择额外配图")
         
         # 获取候选图像 - 我们需要至少4*num_additional_images张图片
-        num_source_images_needed = min(4 * num_additional_images, 12)  # 限制最多12张源图
+        # num_source_images_needed = min(4 * num_additional_images, 12)  # 限制最多12张源图 <-- 旧逻辑
+        total_images_needed = 4 * num_additional_images # 计算总共需要的唯一图片数量
         
         candidate_images = self.get_candidate_images(
             poster_metadata_path,
             source_image_dir,
-            num_source_images_needed
+            # num_source_images_needed <-- 旧逻辑
+            total_images_needed # 请求总共需要的图片数量
         )
         
         if not candidate_images:
             logger.warning("没有找到合适的候选图像")
             return []
-        
-        if len(candidate_images) < 4:
+            
+        # 检查是否有足够的图片来生成请求数量的配图
+        if len(candidate_images) < total_images_needed:
+            adjusted_num_images = len(candidate_images) // 4
+            logger.warning(
+                f"可用图像数量 ({len(candidate_images)}) 不足以生成 {num_additional_images} 张不重复的2x2配图 "
+                f"(需要 {total_images_needed} 张)。将只生成 {adjusted_num_images} 张配图。"
+            )
+            num_additional_images = adjusted_num_images
+            if num_additional_images == 0:
+                 logger.warning("可用图像数量少于4张，无法创建任何2x2拼图。")
+                 return []
+        elif len(candidate_images) < 4: # 即使调整后，检查是否仍少于4张
             logger.warning(f"可用图像数量({len(candidate_images)})少于4张，无法创建2x2拼图")
             return []
             
@@ -232,24 +245,35 @@ class PosterNotesCreator:
         with concurrent.futures.ProcessPoolExecutor(max_workers=min(4, num_additional_images)) as executor:
             # 创建任务
             future_to_image_set = {}
+            start_index = 0 # 用于追踪从candidate_images中取图的起始位置
             
             for i in range(num_additional_images):
-                # 为每个输出选择4张不同的图片
-                selected_indices = []
-                # 确保我们有足够的图片可选择
-                available_indices = list(range(len(candidate_images)))
+                # # 为每个输出选择4张不同的图片 <-- 旧逻辑，改为切片
+                # selected_indices = []
+                # # 确保我们有足够的图片可选择
+                # available_indices = list(range(len(candidate_images)))
                 
-                # 如果图片不够，我们可能需要重复使用一些图片
-                if len(available_indices) < 4:
-                    selected_indices = available_indices * (4 // len(available_indices) + 1)
-                    selected_indices = selected_indices[:4]
-                else:
-                    # 随机选择4个不同的索引
-                    selected_indices = random.sample(available_indices, 4)
+                # # 如果图片不够，我们可能需要重复使用一些图片
+                # if len(available_indices) < 4:
+                #     selected_indices = available_indices * (4 // len(available_indices) + 1)
+                #     selected_indices = selected_indices[:4]
+                # else:
+                #     # 随机选择4个不同的索引
+                #     selected_indices = random.sample(available_indices, 4)
                 
-                # 获取对应的图片文件名
-                selected_images = [candidate_images[idx] for idx in selected_indices]
+                # # 获取对应的图片文件名
+                # selected_images = [candidate_images[idx] for idx in selected_indices]
+
+                # --- 新逻辑：从打乱后的列表中顺序切片获取不重复的图像 ---
+                end_index = start_index + 4
+                if end_index > len(candidate_images): # 双重检查，理论上不应发生
+                    logger.error(f"内部错误：尝试获取的图像索引超出范围 ({start_index}-{end_index})，可用图像: {len(candidate_images)}")
+                    break 
                 
+                selected_images = candidate_images[start_index:end_index]
+                start_index = end_index # 更新下一个起始索引
+                # --- 结束新逻辑 ---
+
                 # 为每个拼图创建单独的种子
                 image_seed = seed + i