Add tablets calibration matrix for dynamic rotation with 2-in1/tablet PC usage (#1319)

src/managers/input/InputManager.hpp

@@ -25,6 +25,26 @@ struct STouchData {
     Vector2D       touchSurfaceOrigin;
 };
 
+// The third row is always 0 0 1 and is not expected by `libinput_device_config_calibration_set_matrix`
+static const float MATRICES[8][6] = {
+  {// normal
+  1, 0, 0, 0, 1, 0},
+  {// rotation 90°
+  0, -1, 1, 1, 0, 0},
+  {// rotation 180°
+  -1, 0, 1, 0, -1, 1},
+  {// rotation 270°
+  0, 1, 0, -1, 0, 1},
+  {// flipped
+  -1, 0, 1, 0, 1, 0},
+  {// flipped + rotation 90°
+  0, 1, 0, 1, 0, 0},
+  {// flipped + rotation 180°
+  1, 0, 0, 0, -1, 1},
+  {// flipped + rotation 270°
+  0, -1, 1, -1, 0, 1}
+};
+
 class CKeybindManager;
 
 class CInputManager {