1 files changed, 6 insertions, 0 deletions
diff --git a/libvo/sub.c b/libvo/sub.c
index 07b3c4b5d4..f410f8ad27 100644
--- a/libvo/sub.c
+++ b/libvo/sub.c
@@ -186,11 +186,17 @@ static void vo_draw_text_sub(int dxs,int dys,void (*draw_alpha)(int x0,int y0, i
 
 }
 
+static int draw_alpha_init_flag=0;
 
 void vo_draw_text(int dxs,int dys,void (*draw_alpha)(int x0,int y0, int w,int h, unsigned char* src, unsigned char *srca, int stride)){
 
     if(!vo_font) return; // no font
 
+    if(!draw_alpha_init_flag){
+	draw_alpha_init_flag=1;
+	vo_draw_alpha_init();
+    }
+
     if(vo_osd_text){
         vo_draw_text_osd(dxs,dys,draw_alpha);
     }