From 80e176e969192ac90d74ef83b4ab22dc0fe21b7a Mon Sep 17 00:00:00 2001
From: Holger Schemel <info@artsoft.org>
Date: Fri, 26 Jan 2007 02:54:29 +0100
Subject: [PATCH] rnd-20070126-1-src

---
 src/conftime.h |  2 +-
 src/game.c     | 31 ++++++++++++++++++++++++++++---
 src/init.c     |  1 -
 src/main.c     |  1 -
 src/main.h     |  1 -
 5 files changed, 29 insertions(+), 7 deletions(-)

diff --git a/src/conftime.h b/src/conftime.h
index a7fc3e08..caae2a71 100644
--- a/src/conftime.h
+++ b/src/conftime.h
@@ -1 +1 @@
-#define COMPILE_DATE_STRING "2007-01-25 03:07"
+#define COMPILE_DATE_STRING "2007-01-26 02:51"
diff --git a/src/game.c b/src/game.c
index bb6e6ede..0b52048d 100644
--- a/src/game.c
+++ b/src/game.c
@@ -10565,8 +10565,32 @@ static boolean AllPlayersInVisibleScreen()
 
 void ScrollLevel(int dx, int dy)
 {
+  int i, x, y;
+
+  /* only horizontal XOR vertical scroll direction allowed */
+  if ((dx == 0 && dy == 0) || (dx != 0 && dy != 0))
+    return;
+
+#if 1
+  int xsize = (BX2 - BX1 + 1);
+  int ysize = (BY2 - BY1 + 1);
+  int start = (dx != 0 ? (dx == -1 ? BX1 : BX2) : (dy == -1 ? BY1 : BY2));
+  int end   = (dx != 0 ? (dx == -1 ? BX2 : BX1) : (dy == -1 ? BY2 : BY1));
+  int step  = (start < end ? +1 : -1);
+
+  for (i = start; i != end; i += step)
+  {
+    BlitBitmap(drawto_field, drawto_field,
+	       FX + TILEX * (dx != 0 ? i + step : 0),
+	       FY + TILEY * (dy != 0 ? i + step : 0),
+	       TILEX * (dx != 0 ? 1 : xsize),
+	       TILEY * (dy != 0 ? 1 : ysize),
+	       FX + TILEX * (dx != 0 ? i : 0),
+	       FY + TILEY * (dy != 0 ? i : 0));
+  }
+#else
+
   int softscroll_offset = (setup.soft_scrolling ? TILEX : 0);
-  int x, y;
 
 #if 1
   BlitBitmap(drawto_field, bitmap_db_field2,
@@ -10591,16 +10615,17 @@ void ScrollLevel(int dx, int dy)
 	     SYSIZE - TILEY * (dy != 0) + 2 * softscroll_offset,
 	     FX + TILEX * (dx == 1) - softscroll_offset,
 	     FY + TILEY * (dy == 1) - softscroll_offset);
+#endif
 #endif
 
-  if (dx)
+  if (dx != 0)
   {
     x = (dx == 1 ? BX1 : BX2);
     for (y = BY1; y <= BY2; y++)
       DrawScreenField(x, y);
   }
 
-  if (dy)
+  if (dy != 0)
   {
     y = (dy == 1 ? BY1 : BY2);
     for (x = BX1; x <= BX2; x++)
diff --git a/src/init.c b/src/init.c
index 6487cb0b..49006fa1 100644
--- a/src/init.c
+++ b/src/init.c
@@ -4718,7 +4718,6 @@ void InitGfx()
   /* create additional image buffers for double-buffering and cross-fading */
   bitmap_db_cross = CreateBitmap(WIN_XSIZE, WIN_YSIZE, DEFAULT_DEPTH);
   bitmap_db_field = CreateBitmap(FXSIZE, FYSIZE, DEFAULT_DEPTH);
-  bitmap_db_field2= CreateBitmap(FXSIZE, FYSIZE, DEFAULT_DEPTH);
   bitmap_db_panel = CreateBitmap(DXSIZE, DYSIZE, DEFAULT_DEPTH);
   bitmap_db_door  = CreateBitmap(3 * DXSIZE, DYSIZE + VYSIZE, DEFAULT_DEPTH);
 
diff --git a/src/main.c b/src/main.c
index 7f0eca2e..83eefa6d 100644
--- a/src/main.c
+++ b/src/main.c
@@ -22,7 +22,6 @@
 
 Bitmap		       *bitmap_db_cross;
 Bitmap		       *bitmap_db_field;
-Bitmap		       *bitmap_db_field2;
 Bitmap		       *bitmap_db_panel;
 Bitmap		       *bitmap_db_door;
 DrawBuffer	       *fieldbuffer;
diff --git a/src/main.h b/src/main.h
index d07b005f..fd1fe6ee 100644
--- a/src/main.h
+++ b/src/main.h
@@ -2559,7 +2559,6 @@ struct HelpAnimInfo
 
 extern Bitmap		       *bitmap_db_cross;
 extern Bitmap		       *bitmap_db_field;
-extern Bitmap		       *bitmap_db_field2;
 extern Bitmap		       *bitmap_db_panel;
 extern Bitmap		       *bitmap_db_door;
 extern Pixmap			tile_clipmask[];
-- 
2.34.1