Funktioning rewrite, that is able to use gpu on a more variety of

systems

src/logging.rs

@@ -0,0 +1,33 @@
+//! Logging and progress line protocol (pure `std`).
+//!
+//! The GUI (Python or future native) consumes plain stdout lines as log text
+//! and lines prefixed with `PROGRESS_PREFIX` as in-place "replace the last
+//! line" progress. Keep this byte-compatible with
+//! `pipeline_360_gui.py`'s expectations.
+
+/// Prefix marking a progress (replace-last-line) message.
+pub const PROGRESS_PREFIX: &str = "[progress] ";
+
+/// A sink for emitted messages. `None` means raw stdout.
+pub type Logger<'a> = Option<&'a dyn Fn(&str)>;
+
+/// Emit a normal log line (message-only; the CLI/GUI decides whether to add a newline).
+pub fn emit(message: &str, logger: Logger) {
+    match logger {
+        Some(f) => f(message),
+        None => println!("{message}"),
+    }
+}
+
+/// Emit a progress (replace-last-line) message with the `[progress] ` prefix.
+pub fn emit_progress(message: &str, logger: Logger) {
+    if let Some(f) = logger {
+        f(&format!("{PROGRESS_PREFIX}{message}"));
+    }
+}
+
+/// A stage header line, e.g. `==== STAGE 1/4: Extract Sharpest Frames ====`.
+pub fn stage_header(index: usize, total: usize, title: &str, logger: Logger) {
+    emit("", logger);
+    emit(&format!("==== STAGE {index}/{total}: {title} ===="), logger);
+}