rnd-20041129-4-src

[rocksndiamonds.git] / src / tools.c

diff --git a/src/tools.c b/src/tools.c
index bd1ded0c740635fdf3400c55eb272d7c32c3418b..ffc1f1ec1e3428de66ddad24a774d28103626087 100644 (file)
--- a/src/tools.c
+++ b/src/tools.c
@@ -5969,8 +5969,12 @@ void InitGraphicInfo_EM(void)
 #endif
 
       /* create unique graphic identifier to decide if tile must be redrawn */
+      /* bit 31 - 16 (16 bit): EM style element
+        bit 15 - 12 ( 4 bit): EM style frame
+        bit 11 -  6 ( 6 bit): graphic width
+        bit  5 -  0 ( 6 bit): graphic height */
       g_em->unique_identifier =
-       (i << 16) | (frame << 8) | g_em->width | g_em->height;
+       (i << 16) | (j << 12) | (g_em->width << 6) | g_em->height;
 
 #if DEBUG_EM_GFX
       if (g_em->bitmap != debug_bitmap ||