update

Author: RobertFlatt

src/camera4kivy/preview.py

@@ -75,6 +75,7 @@ def connect_camera(self, analyze_pixels_resolution = 1024,
         self.analyze_resolution = analyze_pixels_resolution
         self.camera_connected = True
         self._finished = False
+        self._fbo = None
         if enable_analyze_pixels:
             Thread(target=self.image_scheduler, daemon=True).start()
         self.preview.connect_camera(analyze_callback =

src/camera4kivy/preview_camerax.py

@@ -162,8 +162,9 @@ def _configure_camera(self, start):
 
     # Device Rotate
     def on_size(self, instance, size):
-        self.stop_capture_video()
-        self._configure_camera(False)
+        if self._camera:
+            self.stop_capture_video()
+            self._configure_camera(False)
 
     ##################################
     # Parse options
@@ -263,8 +264,8 @@ def capture_screenshot(self, location = '.', subdir = '', name = ''):
 
     # Select back, front camera
     def select_camera(self, facing):
-        facing = facing.lower()
         if self._camera:
+            facing = facing.lower()
             if facing == 'toggle':
                 if self.facing == 'back':
                     self.facing = 'front'
@@ -281,7 +282,8 @@ def select_camera(self, facing):
                 self.stop_capture_video()
                 self._facing_ev = Clock.schedule_interval(
                     self.can_select_camera, 1 / 30)
-        return self.facing
+            facing = self.facing
+        return facing
 
     def can_select_camera(self,dt):
         if not self.capture_in_progress:
@@ -302,7 +304,8 @@ def flash(self):
             else:
                 self.flash_state = 'off'
             self.flash_state = self._camera.flash(self.flash_state)
-        return self.flash_state
+            return self.flash_state
+        return "off"
 
     # if enable_focus_gesture == True, then this is called by a tap gesture
     def focus(self, x, y):