From df8f020b9c0aad57e1f2e790c771550232fb6ce8 Mon Sep 17 00:00:00 2001
From: Holger Schemel <info@artsoft.org>
Date: Tue, 24 Nov 2009 23:03:11 +0100
Subject: [PATCH] rnd-20091124-2-src

---
 src/conftime.h               |  2 +-
 src/game_sp/DDScrollBuffer.c | 53 ++++++++++++++++++++++++++++++++++++
 src/game_sp/DDSpriteBuffer.c | 10 ++++---
 src/game_sp/MainForm.c       |  4 +++
 src/game_sp/main_sp.h        |  5 ++++
 5 files changed, 69 insertions(+), 5 deletions(-)

diff --git a/src/conftime.h b/src/conftime.h
index a8578e71..abed863e 100644
--- a/src/conftime.h
+++ b/src/conftime.h
@@ -1 +1 @@
-#define COMPILE_DATE_STRING "2009-11-24 01:16"
+#define COMPILE_DATE_STRING "2009-11-24 23:00"
diff --git a/src/game_sp/DDScrollBuffer.c b/src/game_sp/DDScrollBuffer.c
index 859fb35d..fdc925f2 100644
--- a/src/game_sp/DDScrollBuffer.c
+++ b/src/game_sp/DDScrollBuffer.c
@@ -348,6 +348,36 @@ void BlitScreenToBitmap_SP(Bitmap *target_bitmap)
   sy = SY + (full_ysize < ysize ? (ysize - full_ysize) / 2 : 0);
 #endif
 
+#if 0
+  {
+    static int mScrollX_tmp = -1;
+    static int mScrollY_tmp = -1;
+
+    if (mScrollX != mScrollX_tmp || mScrollY != mScrollY_tmp)
+    {
+      printf("::: %ld, %ld\n", mScrollX, mScrollY);
+
+      mScrollX_tmp = mScrollX;
+      mScrollY_tmp = mScrollY;
+    }
+  }
+#endif
+
+#if 0
+  {
+    static boolean x = 0;
+
+    if (x == 0)
+    {
+      printf("::: %d, %d (%d, %d) (%d, %d) [%ld, %ld] [%ld, %ld] \n",
+	     sx, sy, xsize, ysize, full_xsize, full_ysize,
+	     mScrollX, mScrollY, mScrollX_last, mScrollY_last);
+
+      x = 1;
+    }
+  }
+#endif
+
 #if 1
   if (!menBorder.Checked)
   {
@@ -356,6 +386,29 @@ void BlitScreenToBitmap_SP(Bitmap *target_bitmap)
   }
 #endif
 
+#if 0
+  if (mScrollX >= 0 && mScrollX <= 16)
+  {
+    px -= mScrollX;
+  }
+#if 0
+  else if (mScrollX >= 352 && mScrollX <= 368)
+  {
+    px -= mScrollX;
+  }
+#endif
+  else if (mScrollX >= 16) // && mScrollX <= 352)
+  {
+    px -= TILEX / 2;
+  }
+#endif
+
+#if 0
+  /* !!! TEST ONLY !!! */
+  px = py = 0;
+  sx = sy = SX;
+#endif
+
   BlitBitmap(screenBitmap, target_bitmap, px, py, sxsize, sysize, sx, sy);
 }
 
diff --git a/src/game_sp/DDSpriteBuffer.c b/src/game_sp/DDSpriteBuffer.c
index 00e49d7a..872ded6f 100644
--- a/src/game_sp/DDSpriteBuffer.c
+++ b/src/game_sp/DDSpriteBuffer.c
@@ -179,10 +179,12 @@ static void Blt(int pX, int pY, int SpriteX, int SpriteY)
 
 #if 1
 
-  int sx1 = mScrollX_last - 2 * TILEX;
-  int sy1 = mScrollY_last - 2 * TILEY;
-  int sx2 = mScrollX_last + SXSIZE + 1 * TILEX;
-  int sy2 = mScrollY_last + SYSIZE + 1 * TILEY;
+  int scx = (mScrollX_last < 0 ? 0 : mScrollX_last);
+  int scy = (mScrollY_last < 0 ? 0 : mScrollY_last);
+  int sx1 = scx - 2 * TILEX;
+  int sy1 = scy - 2 * TILEY;
+  int sx2 = scx + SXSIZE + 1 * TILEX;
+  int sy2 = scy + SYSIZE + 1 * TILEY;
 
   int sx = pX - sx1;
   int sy = pY - sy1;
diff --git a/src/game_sp/MainForm.c b/src/game_sp/MainForm.c
index a2dfbbeb..a9dc22c5 100644
--- a/src/game_sp/MainForm.c
+++ b/src/game_sp/MainForm.c
@@ -1029,6 +1029,10 @@ void DisplayLevel()
   if (! LevelLoaded)
     return;
 
+  ClearRectangle(backbuffer, REAL_SX, REAL_SY, FULL_SXSIZE, FULL_SYSIZE);
+  ClearRectangle(screenBitmap, 0, 0,
+		 MAX_BUF_XSIZE * TILEX, MAX_BUF_YSIZE * TILEY);
+
 #if 1
   SetDisplayRegion();
 #endif
diff --git a/src/game_sp/main_sp.h b/src/game_sp/main_sp.h
index 7e0480e2..008afa31 100644
--- a/src/game_sp/main_sp.h
+++ b/src/game_sp/main_sp.h
@@ -49,6 +49,11 @@
 #define SXSIZE			(SCR_FIELDX * TILEX)
 #define SYSIZE			(SCR_FIELDY * TILEY)
 
+#define REAL_SX			(SX - 2)
+#define REAL_SY			(SY - 2)
+#define FULL_SXSIZE		(2 + SXSIZE + 2)
+#define FULL_SYSIZE		(2 + SYSIZE + 2)
+
 
 /* ------------------------------------------------------------------------- */
 /* data structure definitions                                                */
-- 
2.34.1