Method set_progress_callback

src/attr.rs:236–238

(&mut self, callback: F)

    /// To share data with the callback, use `Arc` or `Atomic*` types and `move ||` closures.
    #[inline]
    pub fn set_progress_callback<F: Fn(f32) -> ControlFlow + Send + Sync + 'static>(&mut self, callback: F) {
        self.progress_callback = Some(Arc::new(callback));
    }

    /// Move transparent color to the last entry in the palette
    ///