update code level

src/image_processor.rs

@@ -80,6 +80,44 @@ impl ImageProcessor {
         }
     }
 
+    /// 快速生成缩略图（低质量但快速）
+    pub async fn generate_fast_thumbnail(&self, image_data: &[u8], _filename: &str) -> Result<Vec<u8>, Box<dyn std::error::Error>> {
+        // 使用快速解码和缩放
+        let img = image::load_from_memory(image_data)?;
+        
+        // 快速缩放到小尺寸（200x150）
+        let thumbnail = img.thumbnail(200, 150);
+        
+        // 使用低质量JPEG压缩以加快编码速度
+        let mut output = Vec::new();
+        thumbnail.write_to(&mut std::io::Cursor::new(&mut output), image::ImageOutputFormat::Jpeg(50))?;
+        
+        Ok(output)
+    }
+
+    /// 快速调整图片尺寸（最大宽度）
+    pub async fn resize_image_to_max(&self, image_data: &[u8], max_width: u32) -> Vec<u8> {
+        match image::load_from_memory(image_data) {
+            Ok(img) => {
+                let (width, height) = img.dimensions();
+                if width <= max_width {
+                    return image_data.to_vec(); // 无需调整
+                }
+                
+                let new_height = (height as f32 * max_width as f32 / width as f32) as u32;
+                let resized = img.thumbnail(max_width, new_height);
+                
+                let mut output = Vec::new();
+                if resized.write_to(&mut std::io::Cursor::new(&mut output), image::ImageOutputFormat::Jpeg(75)).is_ok() {
+                    output
+                } else {
+                    image_data.to_vec() // 失败时返回原图
+                }
+            }
+            Err(_) => image_data.to_vec(), // 解码失败时返回原图
+        }
+    }
+
     pub fn get_image_url(&self, filename: &str) -> String {
         format!("/images/{}", filename)
     }
@@ -128,7 +166,7 @@ impl ImageProcessor {
         let img = image::load_from_memory(image_data)?;
         
         // 生成缩略图（400x300，保持宽高比）
-        let thumbnail = img.thumbnail(400, 300);
+        let thumbnail = img.thumbnail(600, 400);
         
         // 将缩略图数据保存到内存缓冲区
         let mut buffer = std::io::Cursor::new(Vec::new());