Use vin/vout.clear() instead of gl.clear()

diff --git a/Demo/sgi/video/Viewer.py b/Demo/sgi/video/Viewer.py
index 6203562952d9f35c75c6e1da79d7303253aa30a8..2a7b2ebb5ed7cefa20415b4b0e88c222dd7d963d 100755 (executable)
--- a/Demo/sgi/video/Viewer.py
+++ b/Demo/sgi/video/Viewer.py
@@ -71,7 +71,7 @@ class InputViewer:
                self.fillq()
                gl.winset(self.wid)
                if self.qindex >= len(self.queue):
-                       gl.clear()
+                       self.vin.clear()
                        return
                dt, d, cd = self.queue[self.qindex]
                self.vin.showframe(d, cd)
@@ -80,6 +80,7 @@ class InputViewer:
                if wid == self.wid >= 0:
                        gl.winset(self.wid)
                        gl.reshapeviewport()
+                       self.vin.clear()
                        self.show()
 
        def get(self):
@@ -175,7 +176,7 @@ class OutputViewer:
                        self.vout.initcolormap()
                gl.winset(self.wid)
                if not self.queue:
-                       gl.clear()
+                       self.vout.clear()
                        return
                dt, d, cd = self.queue[-1]
                self.vout.showframe(d, cd)
@@ -184,6 +185,7 @@ class OutputViewer:
                if wid == self.wid >= 0:
                        gl.winset(self.wid)
                        gl.reshapeviewport()
+                       self.vout.clear()
                        self.show()
 
        def backup(self):