From: Holger Schemel <info@artsoft.org>
Date: Sun, 20 Mar 2016 15:22:54 +0000 (+0100)
Subject: fixed forced screen redraw in every frame (again)
X-Git-Tag: 4.0.0.0-rc1~40
X-Git-Url: https://git.artsoft.org/?p=rocksndiamonds.git;a=commitdiff_plain;h=5ba8f1c1b0b33810e56f4a990ee6b813a51180d7

fixed forced screen redraw in every frame (again)
---

diff --git a/src/tools.c b/src/tools.c
index 3948bcb1..552eef2f 100644
--- a/src/tools.c
+++ b/src/tools.c
@@ -506,8 +506,14 @@ static void PrintFrameTimeDebugging()
 
 void BackToFront()
 {
+  static int last_redraw_mask = REDRAW_NONE;
+
+  // force screen redraw in every frame to continue drawing global animations
+  // (but always use the last redraw mask to prevent unwanted side effects)
   if (redraw_mask == REDRAW_NONE)
-    return;
+    redraw_mask = last_redraw_mask;
+
+  last_redraw_mask = redraw_mask;
 
 #if 1
   // masked border now drawn immediately when blitting backbuffer to window
@@ -552,9 +558,6 @@ void BackToFront()
 
   redraw_mask = REDRAW_NONE;
 
-  // force screen redraw in every frame to continue drawing global animations
-  redraw_mask = REDRAW_FIELD;
-
 #if DEBUG_FRAME_TIME
   PrintFrameTimeDebugging();
 #endif