diff --git a/maomao.c b/maomao.c
index 1fe9804..dfbec42 100644
--- a/maomao.c
+++ b/maomao.c
@@ -4176,11 +4176,20 @@ void snap_scene_buffer_apply_size(struct wlr_scene_buffer *buffer, int sx,
 }
 
 void buffer_set_size(Client *c, animationScale data) {
+
+  /*
+    only scale few previous frames in zoom in. without scale, 
+    the surface may not fill window area at the beginning.
+    if scale too more frames, it can cause visual shaking
+  */
+  double animation_passed =
+      (double)c->animation.passed_frames / c->animation.total_frames;
+
   if (c->animation.current.width <= c->geom.width &&
-    c->animation.current.height <= c->geom.height &&
-    data.height_scale == 1 && data.width_scale == 1) {
+      c->animation.current.height <= c->geom.height && animation_passed > 0.1) {
     return;
-  } 
+  }
+
   if (c->iskilling || c->animation.tagouting || c->animation.tagining ||
       c->animation.tagouted) {
     return;