Added rotation of camera, closes #45

photobooth/camera/__init__.py

@@ -52,6 +52,10 @@ class Camera:
         self._is_preview = self._cfg.getBool('Photobooth', 'show_preview')
         self._is_keep_pictures = self._cfg.getBool('Storage', 'keep_pictures')
 
+        rot_vals = {0: None, 90: Image.ROTATE_90, 180: Image.ROTATE_180,
+                    270: Image.ROTATE_270}
+        self._rotation = rot_vals[self._cfg.getInt('Camera', 'rotation')]
+
     def startup(self):
 
         self._cap = self._cam()
@@ -59,8 +63,11 @@ class Camera:
         logging.info('Using camera {} preview functionality'.format(
             'with' if self._is_preview else 'without'))
 
-        self._pic_dims = PictureDimensions(self._cfg,
+        test_picture = self._cap.getPicture()
-                                           self._cap.getPicture().size)
+        if self._rotation is not None:
+            test_picture = test_picture.transpose(self._rotation)
+
+        self._pic_dims = PictureDimensions(self._cfg, test_picture.size)
         self._is_preview = self._is_preview and self._cap.hasPreview
 
         background = self._cfg.get('Picture', 'background')
@@ -120,8 +127,11 @@ class Camera:
 
         if self._is_preview:
             while self._comm.empty(Workers.CAMERA):
-                picture = ImageOps.mirror(self._cap.getPreview())
+                picture = self._cap.getPreview()
+                if self._rotation is not None:
+                    picture = picture.transpose(self._rotation)
                 picture = picture.resize(self._pic_dims.previewSize)
+                picture = ImageOps.mirror(picture)
                 self._comm.send(Workers.GUI,
                                 StateMachine.CameraEvent('preview', picture))
 
@@ -129,6 +139,8 @@ class Camera:
 
         self.setIdle()
         picture = self._cap.getPicture()
+        if self._rotation is not None:
+            picture = picture.transpose(self._rotation)
         self._pictures.append(picture)
         self.setActive()
 

photobooth/defaults.cfg

@@ -16,6 +16,8 @@ style = default
 # Camera module to use (python-gphoto2, gphoto2-cffi, gphoto2-commandline, 
 # opencv, picamera, dummy)
 module = python-gphoto2
+# Specify rotation of camera in degree (possible values: 0, 90, 180, 270)
+rotation = 0
 
 [Gpio]
 # Enable use of GPIO (True/False)

photobooth/gui/Qt5Gui/Frames.py

@@ -613,8 +613,25 @@ class Settings(QtWidgets.QFrame):
                                            self._cfg.get('Camera', 'module'))
         self.add('Camera', 'module', module)
 
+        self.rot_vals_ = (0, 90, 180, 270)
+        cur_rot = self._cfg.getInt('Camera', 'rotation')
+
+        rotation = QtWidgets.QComboBox()
+        for r in self.rot_vals_:
+            rotation.addItem(str(r))
+
+        idx = [x for x, r in enumerate(self.rot_vals_) if r == cur_rot]
+        rotation.setCurrentIndex(idx[0] if len(idx) > 0 else -1)
+
+        # Fix bug in Qt to allow changing the items in a stylesheet
+        delegate = QtWidgets.QStyledItemDelegate()
+        rotation.setItemDelegate(delegate)
+
+        self.add('Camera', 'rotation', rotation)
+
         layout = QtWidgets.QFormLayout()
         layout.addRow(_('Camera module:'), module)
+        layout.addRow(_('Camera rotation:'), rotation)
 
         widget = QtWidgets.QWidget()
         widget.setLayout(layout)
@@ -862,6 +879,8 @@ class Settings(QtWidgets.QFrame):
         self._cfg.set('Camera', 'module',
                       camera.modules[self.get('Camera',
                                               'module').currentIndex()][0])
+        self._cfg.set('Camera', 'rotation', str(
+            self.rot_vals_[self.get('Camera', 'rotation').currentIndex()]))
 
         self._cfg.set('Picture', 'num_x', self.get('Picture', 'num_x').text())
         self._cfg.set('Picture', 'num_y', self.get('Picture', 'num_y').text())