debug: Add more tracing for initial operations

src/application.rs

@@ -75,11 +75,13 @@ mod imp {
     // Overrides GApplication vfuncs
     impl ApplicationImpl for LpApplication {
         fn startup(&self) {
+            log::trace!("Startup");
             self.parent_startup();
             LpShyBin::ensure_type();
         }
 
         fn activate(&self) {
+            log::trace!("Activate");
             let application = self.obj();
             let window = LpWindow::new(&*application);
             window.present();
@@ -87,6 +89,7 @@ mod imp {
 
         // Handles opening files from the command line or other applications
         fn open(&self, files: &[gio::File], _hint: &str) {
+            log::trace!("Open {} file(s)", files.len());
             let application = self.obj();
             let win = LpWindow::new(&*application);
             win.image_view().set_images_from_files(files.to_vec());

src/decoder/formats/glycin_proxy.rs

@@ -48,6 +48,7 @@ impl Glycin {
         let (next_frame_send, next_frame_recv) = async_channel::bounded(2);
 
         updater.clone().spawn_error_handled(async move {
+            log::trace!("Setting up loader");
             let mut image_request = glycin::Loader::new(file);
 
             #[cfg(feature = "disable-glycin-sandbox")]
@@ -56,6 +57,7 @@ impl Glycin {
             image_request.cancellable(cancellable_);
 
             let image = image_request.request().await?;
+            log::trace!("Image info received");
 
             let mut metadata: Metadata = Metadata::default();
             metadata.set_image_info(image.info().details.clone());

src/main.rs

@@ -81,13 +81,19 @@ fn main() -> glib::ExitCode {
 
     log_builder.init();
 
+    log::debug!("Logger initialized");
+
     setlocale(LocaleCategory::LcAll, "");
     bindtextdomain("loupe", config::LOCALEDIR).unwrap();
     textdomain("loupe").unwrap();
 
+    log::trace!("gettext initialized");
+
     gio::resources_register(
         &gio::Resource::from_data(&glib::Bytes::from_static(GRESOURCE_BYTES)).unwrap(),
     );
 
+    log::trace!("Gio resources registered");
+
     LpApplication::new().run()
 }

src/widgets/image.rs

@@ -232,6 +232,9 @@ mod imp {
         pub(super) widget_dimensions: Cell<(i32, i32)>,
         pub(super) scaling: Cell<f64>,
         pub(super) surface_signals: OnceCell<SignalGroup>,
+
+        /// Number of snapshots created, debug only
+        pub(super) nth_snapshot: Cell<u8>,
     }
 
     #[glib::object_subclass]

src/widgets/image/rendering.rs

@@ -65,6 +65,12 @@ impl WidgetImpl for imp::LpImage {
 
         let applicable_zoom = self.applicable_zoom();
 
+        let nth_snaphot = self.nth_snapshot.get() + 1;
+        if nth_snaphot < 3 {
+            self.nth_snapshot.set(nth_snaphot);
+            log::trace!("Creating snapshot #{nth_snaphot}");
+        }
+
         let scaling_filter = if obj.metadata().is_svg() {
             // Looks better in SVG animations and avoids rendering issues
             gsk::ScalingFilter::Linear
@@ -125,6 +131,10 @@ impl WidgetImpl for imp::LpImage {
             .add_to_snapshot(snapshot, applicable_zoom, &render_options);
 
         snapshot.restore();
+
+        if nth_snaphot < 3 {
+            log::trace!("Snapshot #{nth_snaphot} created");
+        }
     }
 
     fn measure(&self, orientation: gtk::Orientation, _for_size: i32) -> (i32, i32, i32, i32) {