metadata: Use gufo instead of kamadak exif

A bunch of metadata code is now provided by gufo.

src/widgets/image/drag.rs

@@ -1,4 +1,4 @@
-// Copyright (c) 2023 Sophie Herold
+// Copyright (c) 2023-2024 Sophie Herold
 //
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU General Public License as published by
@@ -44,8 +44,8 @@ impl LpImage {
 
         imp.snapshot_rotate_mirror(
             &snapshot,
-            -orientation.rotation as f32,
-            orientation.mirrored,
+            -(orientation.rotate().degrees() as f32),
+            orientation.mirror(),
             scale as f64,
         );
 

src/widgets/image/metadata.rs

@@ -15,6 +15,8 @@
 //
 // SPDX-License-Identifier: GPL-3.0-or-later
 
+use gufo::common::orientation::Rotation;
+
 use super::*;
 use crate::metadata;
 
@@ -98,7 +100,7 @@ impl LpImage {
     /// Image size of original image with EXIF rotation applied
     pub fn image_size(&self) -> (i32, i32) {
         let orientation = self.imp().metadata.borrow().orientation();
-        if orientation.rotation.abs() == 90. || orientation.rotation.abs() == 270. {
+        if orientation.rotate() == Rotation::_90 || orientation.rotate() == Rotation::_270 {
             let (x, y) = self.imp().original_dimensions();
             (y, x)
         } else {

src/widgets/image/printing.rs

@@ -31,8 +31,8 @@ impl LpImage {
 
         self.imp().snapshot_rotate_mirror(
             &snapshot,
-            -orientation.rotation as f32,
-            orientation.mirrored,
+            -(orientation.rotate().degrees() as f32),
+            orientation.mirror(),
             scale,
         );
 

src/widgets/image/rotation.rs

@@ -76,9 +76,11 @@ impl LpImage {
     pub fn reset_rotation(&self) {
         log::debug!("Resetting rotation");
         let orientation = self.metadata().orientation();
-        self.imp().rotation_target.set(-orientation.rotation);
-        self.set_mirrored(orientation.mirrored);
-        self.set_rotation(-orientation.rotation);
+        self.imp()
+            .rotation_target
+            .set(-(orientation.rotate().degrees() as f64));
+        self.set_mirrored(orientation.mirror());
+        self.set_rotation(-(orientation.rotate().degrees() as f64));
     }
 
     pub fn rotate_by(&self, angle: f64) {