Added to Utils a function to compute polygon boundaries

Moved Utils to libappserver - DisplaySupport needs it
Tweaked PicturePlayer to match polygon function tweaks
Added Shape, Region, and Polygon handling to ServerWindow
Removed ServerWindow::DispatchGraphicsMessage
Numerous small tweaks to DisplayDriver


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@8991 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/servers/app/server/Utils.cpp

@@ -301,3 +301,27 @@ status_t ConvertModeToDisplayMode(uint32 mode, display_mode *dmode)
 	}
 	return B_OK;
 }
+
+BRect CalculatePolygonBounds(BPoint *pts, int32 pointcount)
+{
+	if(!pts)
+		return BRect(0,0,0,0);
+	
+	BRect r(0,0,0,0);
+
+	// shamelessly stolen from Marc's BPolygon code and tweaked to fit. :P
+	r = BRect(pts[0], pts[0]);
+
+	for (int32 i = 1; i < 4; i++)
+	{
+		if (pts[i].x < r.left)
+			r.left = pts[i].x;
+		if (pts[i].y < r.top)
+			r.top = pts[i].y;
+		if (pts[i].x > r.right)
+			r.right = pts[i].x;
+		if (pts[i].y > r.bottom)
+			r.bottom = pts[i].y;
+	}
+	return r;
+}