X-Git-Url: http://git.cinelerra-gg.org/git/?p=goodguy%2Fhistory.git;a=blobdiff_plain;f=cinelerra-5.1%2Fguicast%2Fbcwindowbase.C;h=fae98cb186b9315572190fa6abd940e3d2f84a0b;hp=006bca30343734bfee60f3d9e7b1828772d7cbcc;hb=2264753cd1968c95829dc01d3d9c394eacff34dc;hpb=90dc26fd7a112ed473878b876f2ed671e2bad8f8

diff --git a/cinelerra-5.1/guicast/bcwindowbase.C b/cinelerra-5.1/guicast/bcwindowbase.C
index 006bca30..fae98cb1 100644
--- a/cinelerra-5.1/guicast/bcwindowbase.C
+++ b/cinelerra-5.1/guicast/bcwindowbase.C
@@ -684,6 +684,15 @@ Display* BC_WindowBase::init_display(const char *display_name)
 			}
 		}
  	}
+
+	static int xsynch = -1;
+	if( xsynch < 0 ) {
+		const char *cp = getenv("CIN_XSYNCH");
+		xsynch = !cp ? 0 : atoi(cp);
+	}
+	if( xsynch > 0 )
+		XSynchronize(display, True);
+
 	return display;
 }