new

konabot/plugins/notice_ui/notice.py

@@ -44,10 +44,34 @@ class NoticeUI:
         
         image = Image.open(BytesIO(image_bytes)).convert("RGBA")
         mask = Image.open(BytesIO(mask_bytes)).convert("L")
-        # 应用遮罩
-        image.putalpha(mask)
 
+        # 使用mask作为alpha通道
+        r, g, b, _ = image.split()
+        transparent_image = Image.merge("RGBA", (r, g, b, mask))
+        
+        # 先创建一个纯白色背景，然后粘贴透明图像
+        background = Image.new("RGBA", transparent_image.size, (255, 255, 255, 255))
+        composite = Image.alpha_composite(background, transparent_image)
+        
+        palette_img = composite.convert("RGB").convert(
+            "P", 
+            palette=Image.Palette.WEB,
+            colors=256,
+            dither=Image.Dither.NONE
+        )
+        
+        # 将alpha值小于128的设为透明
+        alpha_mask = mask.point(lambda x: 0 if x < 128 else 255)
+        
+        # 保存为GIF
         output_buffer = BytesIO()
-        image.save(output_buffer, format="GIF", disposal=2, loop=0)
+        palette_img.save(
+            output_buffer,
+            format="GIF",
+            transparency=0,  # 将索引0设为透明
+            disposal=2,
+            loop=0
+        )
+        
         output_buffer.seek(0)
         return output_buffer.getvalue()