X-Git-Url: https://git.artsoft.org/?a=blobdiff_plain;f=src%2Fgame_sp%2FDDScrollBuffer.c;h=6df6f1e20c3aa24735e3861a58b3a1a4a646a56e;hb=843029e7c2253a35aa1b4ac87241978808b9e6fc;hp=859fb35d18e7cc83842101d17ae4790637e22be5;hpb=ed873d89bc59f4e641134f9019ce216234b9f38f;p=rocksndiamonds.git

diff --git a/src/game_sp/DDScrollBuffer.c b/src/game_sp/DDScrollBuffer.c
index 859fb35d..6df6f1e2 100644
--- a/src/game_sp/DDScrollBuffer.c
+++ b/src/game_sp/DDScrollBuffer.c
@@ -129,6 +129,31 @@ static void ScrollPlayfieldIfNeededExt(boolean reset)
     return;
   }
 
+#if 1
+
+  /* check if scrolling the playfield requires redrawing the viewport bitmap */
+  if ((mScrollX != mScrollX_last ||
+       mScrollY != mScrollY_last) &&
+      (ABS(mScrollX - mScrollX_last) >= TILEX ||
+       ABS(mScrollY - mScrollY_last) >= TILEY))
+  {
+    int dx = (ABS(mScrollX - mScrollX_last) < TILEX ? 0 :
+	      mScrollX < mScrollX_last ? 1 : mScrollX > mScrollX_last ? -1 : 0);
+    int dy = (ABS(mScrollY - mScrollY_last) < TILEY ? 0 :
+	      mScrollY < mScrollY_last ? 1 : mScrollY > mScrollY_last ? -1 : 0);
+
+    mScrollX_last -= dx * TILEX;
+    mScrollY_last -= dy * TILEY;
+
+    ScrollPlayfield(dx, dy);
+
+#if 0
+    printf("::: %ld, %ld\n", mScrollX, mScrollY);
+#endif
+  }
+
+#else
+
   /* check if scrolling the playfield reached the destination tile position */
   if ((mScrollX != mScrollX_last || mScrollY != mScrollY_last) &&
       mScrollX % TILEX == 0 && mScrollY % TILEY == 0)
@@ -140,7 +165,13 @@ static void ScrollPlayfieldIfNeededExt(boolean reset)
     mScrollY_last = mScrollY;
 
     ScrollPlayfield(dx, dy);
+
+#if 0
+    printf("::: %ld, %ld\n", mScrollX, mScrollY);
+#endif
   }
+
+#endif
 }
 
 static void ScrollPlayfieldIfNeeded()
@@ -332,10 +363,22 @@ void DDScrollBuffer_Cls(int BackColor)
 
 void BlitScreenToBitmap_SP(Bitmap *target_bitmap)
 {
+#if 0
+  int px = 2 * TILEX + mScrollX % TILEX;
+  int py = 2 * TILEY + mScrollY % TILEY;
+#else
   int px = 2 * TILEX + (mScrollX - mScrollX_last) % TILEX;
   int py = 2 * TILEY + (mScrollY - mScrollY_last) % TILEY;
+#endif
   int sx, sy, sxsize, sysize;
 
+#if 0
+  if (mScrollX % TILEX != (mScrollX - mScrollX_last) % TILEX ||
+      mScrollY % TILEY != (mScrollY - mScrollY_last) % TILEY)
+    printf("::: %ld, %ld / %ld, %ld\n",
+	   mScrollX, mScrollY, mScrollX_last, mScrollY_last);
+#endif
+
 #if 1
   int xsize = SXSIZE;
   int ysize = SYSIZE;
@@ -348,6 +391,36 @@ 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 +429,29 @@ 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);
 }
 
@@ -728,8 +824,8 @@ void DDScrollBuffer_ScrollTowards(int X, int Y, double Step)
     return;
 
 #if 0
-  printf("::: DDScrollBuffer.c: DDScrollBuffer_ScrollTowards(): (1) mScroll: %ld, %ld [%d, %d, %f]\n",
-	 mScrollX, mScrollY, X, Y, Step);
+  printf("::: DDScrollBuffer.c: DDScrollBuffer_ScrollTowards(): (1) mScroll: %ld, %ld [%d, %d, %f, %f]\n",
+	 mScrollX, mScrollY, X, Y, Step, Stretch);
 #endif
 
   X = X / Stretch;