From: Holger Schemel <info@artsoft.org>
Date: Tue, 8 Feb 2022 16:05:47 +0000 (+0100)
Subject: fixed crash bug caused by accessing invalid (off-playfield) array positions
X-Git-Tag: 4.3.1.1~2
X-Git-Url: https://git.artsoft.org/?a=commitdiff_plain;h=8fe5772614b88c44ecfba69086459a76a7b1cf30;p=rocksndiamonds.git

fixed crash bug caused by accessing invalid (off-playfield) array positions

This bug caused accessing array "GfxFrame[][]" out of bounds if level
position is not inside the playfield. (This is always the case when
invoked from "DrawScreenElementExt()" for level border elements.
---

diff --git a/src/tools.c b/src/tools.c
index 6a998afb..9fe777c9 100644
--- a/src/tools.c
+++ b/src/tools.c
@@ -1506,7 +1506,9 @@ int getGraphicAnimationFrameXY(int graphic, int lx, int ly)
     return sync_frame % g->anim_frames;
   }
 
-  return getGraphicAnimationFrame(graphic, GfxFrame[lx][ly]);
+  int sync_frame = (IN_LEV_FIELD(lx, ly) ? GfxFrame[lx][ly] : -1);
+
+  return getGraphicAnimationFrame(graphic, sync_frame);
 }
 
 void getGraphicSourceBitmap(int graphic, int tilesize, Bitmap **bitmap)