bilinear interpolation working

src/pycture/commands/edit_commands/interpolation.py

@@ -42,5 +42,5 @@ def bilinear_interpolation(image: QImage, point: (float, float)):
 
     P = R + (Q - R) * q
 
-    return P
+    return round(P)
 

src/pycture/commands/edit_commands/rotate.py

@@ -1,6 +1,6 @@
 from PyQt5.QtWidgets import QWidget, QMainWindow
 from ..command import Command
-from .interpolation import nearest_neighbor_interpolation
+from .interpolation import bilinear_interpolation, nearest_neighbor_interpolation
 from pycture.dialogs import RotateDialog
 from pycture.editor import Editor
 
@@ -10,6 +10,7 @@ def __init__(self, parent: QWidget):
         super().__init__(parent, "Rotate")
         self.interpolation_techniques = {
             "Nearest neighbour": nearest_neighbor_interpolation,
+            "Bilinear": bilinear_interpolation,
         }
 
     def apply_rotation(self, editor_title, interpolation_technique, angle):
@@ -23,7 +24,7 @@ def execute(self, main_window: QMainWindow):
         # Open dialog
         # Connect dialog button to rotate function
         self.main_window = main_window
-        dialog = RotateDialog(main_window, main_window.get_editor_list())
+        dialog = RotateDialog(main_window, main_window.get_editor_list(), list(self.interpolation_techniques.keys()))
         dialog.set_editor(main_window.get_active_editor_name())
         dialog.set_interpolation_technique(
             list(self.interpolation_techniques.keys())[0])

src/pycture/dialogs/rotate_dialog.py

@@ -7,29 +7,29 @@
 
 
 class RotateDialog(QDialog):
-    #                img  interpolation  size(int, int)
-    applied = Signal(str, str, tuple)
+    #                img  interpolation  angle
+    applied = Signal(str, str, float)
 
-    def __init__(self, parent: QMainWindow, editors: List[str], angle_limit = 180):
+    def __init__(self, parent: QMainWindow, editors: List[str], interpolation_techniques: List[str], angle_limit = 180):
         super().__init__(parent, Qt.WindowType.Window)
         self.setWindowTitle("Scale")
         self.layout = QVBoxLayout()
         self.layout.setSizeConstraint(QLayout.SetFixedSize)
         self.setLayout(self.layout)
         self.angle_limit = angle_limit
 
-        self.setup(editors)
+        self.setup(editors, interpolation_techniques)
 
         self.show()
 
-    def setup(self, editors: List[str]):
+    def setup(self, editors: List[str], interpolation_techniques: List[str]):
         layout = QVBoxLayout()
         self.layout.addLayout(layout)
 
         self.editors_dropdown = DropdownList(self, editors)
         layout.addWidget(self.editors_dropdown)
 
-        self.interpolation_dropdown = DropdownList(self, ["Nearest neighbour"])
+        self.interpolation_dropdown = DropdownList(self, interpolation_techniques)
         layout.addWidget(self.interpolation_dropdown)