diff --git a/src/renderer/image.c b/src/renderer/image.c
index cae6e23..429727c 100644
--- a/src/renderer/image.c
+++ b/src/renderer/image.c
@@ -33,9 +33,8 @@ uint32_t *generate_wallpaper(const wallpaper_config_t *wallpaper_config,
   uint32_t monitor_index = 0;
   while (monitor) {
     uint32_t img_index = (index + monitor_index) % wallpaper_config->count;
-
-    Imlib_Image wallpaper_img =
-      imlib_load_image(wallpaper_config->path_list[img_index]);
+    const char *path = wallpaper_config->path_list[img_index];
+    Imlib_Image wallpaper_img = imlib_load_image(path);
     if (!wallpaper_img) {
       monitor = monitor->next;
       monitor_index++;
@@ -55,14 +54,11 @@ uint32_t *generate_wallpaper(const wallpaper_config_t *wallpaper_config,
     float height_ratio = (float)dst_height / img_height;
     float scale = MAX(width_ratio, height_ratio);
 
-    uint32_t scaled_width = img_width * scale;
-    uint32_t scaled_height = img_height * scale;
-
     /* 图片居中显示，计算原图绘制区域 */
-    int src_x = (scaled_width - dst_width) / (2 * scale);
-    int src_y = (scaled_height - dst_height) / (2 * scale);
     int src_width = dst_width / scale;
     int src_height = dst_height / scale;
+    int src_x = (img_width - src_width) / 2;
+    int src_y = (img_height - src_height) / 2;
 
     /* 绘制图片到最终图像上 */
     imlib_context_set_image(final_image);
@@ -84,7 +80,7 @@ uint32_t *generate_wallpaper(const wallpaper_config_t *wallpaper_config,
 
   /* 复制数据到自己分配的内存中（原数据会在图像释放后无效） */
   size_t data_size = screen_width * screen_height * sizeof(uint32_t);
-  uint32_t *result = malloc(data_size);
+  uint32_t *result = ecalloc(1, data_size);
   if (result) memcpy(result, data, data_size);
 
   /* 释放图像 */