removed trailing whitespace

[xboard.git] / board.c

diff --git a/board.c b/board.c
index 6abbabb..d4afa00 100644 (file)
--- a/board.c
+++ b/board.c
@@ -5,7 +5,7 @@
  * Massachusetts.
  *
  * Enhancements Copyright 1992-2001, 2002, 2003, 2004, 2005, 2006,
- * 2007, 2008, 2009, 2010, 2011, 2012 Free Software Foundation, Inc.
+ * 2007, 2008, 2009, 2010, 2011, 2012, 2013 Free Software Foundation, Inc.
  *
  * The following terms apply to Digital Equipment Corporation's copyright
  * interest in XBoard:
@@ -163,7 +163,7 @@ SetHighlights (int fromX, int fromY, int toX, int toY)
            drawHighlight(hi2X, hi2Y, 0);
        }
     }
-    
+
     if(arrow) // there currently is an arrow displayed
        ArrowDamage(hi1X, hi1Y, hi2X, hi2Y); // mark which squares it damaged
 
@@ -479,12 +479,12 @@ AnimationFrame (AnimNr anr, Pnt *frame, ChessSquare piece)
   MyRectangle updates[4];
   MyRectangle overlap;
   Pnt     pt;
-  int       count, i;
   AnimState *anim = &anims[anr];
+  int     count, i, x, y, w, h;
 
   /* Save what we are about to draw into the new buffer */
   CopyRectangle(anr, DISP, 0,
-           frame->x, frame->y, squareSize, squareSize,
+           x = frame->x, y = frame->y, w = squareSize, h = squareSize,
            0, 0);
 
   /* Erase bits of the previous frame */
@@ -503,11 +503,17 @@ AnimationFrame (AnimNr anr, Pnt *frame, ChessSquare piece)
                updates[i].y - anim->prevFrame.y,
                updates[i].width, updates[i].height,
                updates[i].x, updates[i].y);
+    /* [HGM] correct expose rectangle to encompass both overlapping squares */
+    if(x > anim->prevFrame.x) w += x - anim->prevFrame.x, x = anim->prevFrame.x;
+    else  w += anim->prevFrame.x - x;
+    if(y > anim->prevFrame.y) h += y - anim->prevFrame.y, y = anim->prevFrame.y;
+    else  h += anim->prevFrame.y - y;
   } else {
     /* Easy when no overlap */
     CopyRectangle(anr, 2, DISP,
                  0, 0, squareSize, squareSize,
                  anim->prevFrame.x, anim->prevFrame.y);
+    GraphExpose(currBoard, anim->prevFrame.x, anim->prevFrame.y, squareSize, squareSize);
   }
 
   /* Save this frame for next time round */
@@ -522,6 +528,7 @@ AnimationFrame (AnimNr anr, Pnt *frame, ChessSquare piece)
   CopyRectangle(anr, 0, DISP,
                0, 0, squareSize, squareSize,
                frame->x, frame->y);
+  GraphExpose(currBoard, x, y, w, h);
 }
 
 static void
@@ -1235,5 +1242,3 @@ DrawArrowHighlight (int fromX, int fromY, int toX,int toY)
     if( IsDrawArrowEnabled() && fromX >= 0 && fromY >= 0 && toX >= 0 && toY >= 0)
         DrawArrowBetweenSquares(fromX, fromY, toX, toY);
 }
-
-