Add summary messages

src/core/region_processor.rs

@@ -5,7 +5,7 @@ use std::{ffi::OsStr, path::Path, time::SystemTime};
 use anyhow::{Context, Result};
 use indexmap::IndexSet;
 use rayon::prelude::*;
-use tracing::{debug, error};
+use tracing::{debug, error, info};
 
 use super::common::*;
 use crate::{
@@ -132,7 +132,7 @@ impl<'a> RegionProcessor<'a> {
 	}
 
 	/// Processes a single region file
-	fn process_region(&self, coords: TileCoords) -> Result<()> {
+	fn process_region(&self, coords: TileCoords) -> Result<bool> {
 		/// Width/height of the region data
 		const N: u32 = (BLOCKS_PER_CHUNK * CHUNKS_PER_REGION) as u32;
 
@@ -150,7 +150,7 @@ impl<'a> RegionProcessor<'a> {
 		if Some(input_timestamp) <= output_timestamp && Some(input_timestamp) <= lightmap_timestamp
 		{
 			debug!("Skipping unchanged region r.{}.{}.mca", coords.x, coords.z);
-			return Ok(());
+			return Ok(false);
 		}
 
 		debug!("Processing region r.{}.{}.mca", coords.x, coords.z);
@@ -188,7 +188,7 @@ impl<'a> RegionProcessor<'a> {
 			Self::save_lightmap(&lightmap_path, &lightmap, input_timestamp)?;
 		}
 
-		Ok(())
+		Ok(true)
 	}
 
 	/// Iterates over all region files of a Minecraft save directory
@@ -203,11 +203,31 @@ impl<'a> RegionProcessor<'a> {
 		fs::create_dir_all(&self.config.processed_dir)?;
 		fs::create_dir_all(&self.config.tile_dir(TileKind::Lightmap, 0))?;
 
-		regions.par_iter().for_each(|&coords| {
-			if let Err(err) = self.process_region(coords) {
-				error!("Failed to process region {:?}: {:?}", coords, err);
-			}
-		});
+		info!("Processing region files...");
+
+		let mut results = vec![];
+		regions
+			.par_iter()
+			.map(|&coords| {
+				let result = self.process_region(coords);
+				if let Err(err) = &result {
+					error!("Failed to process region {:?}: {:?}", coords, err);
+				}
+				result
+			})
+			.collect_into_vec(&mut results);
+
+		let processed = results
+			.iter()
+			.filter(|result| matches!(result, Ok(true)))
+			.count();
+		let errors = results.iter().filter(|result| result.is_err()).count();
+		info!(
+			"Processed region files ({} processed, {} unchanged, {} errors)",
+			processed,
+			results.len() - processed,
+			errors,
+		);
 
 		Ok(regions)
 	}

src/core/tile_mipmapper.rs

@@ -2,7 +2,7 @@
 
 use anyhow::{Context, Result};
 use rayon::prelude::*;
-use tracing::{debug, warn};
+use tracing::{debug, info, warn};
 
 use super::common::*;
 use crate::{io::fs, types::*};
@@ -58,7 +58,7 @@ impl<'a> TileMipmapper<'a> {
 		level: usize,
 		coords: TileCoords,
 		prev: &TileCoordMap,
-	) -> Result<()>
+	) -> Result<(bool, bool)>
 	where
 		[P::Subpixel]: image::EncodableLayout,
 		image::ImageBuffer<P, Vec<P::Subpixel>>: Into<image::DynamicImage>,
@@ -93,7 +93,7 @@ impl<'a> TileMipmapper<'a> {
 			.collect();
 
 		let Some(input_timestamp) = sources.iter().map(|(_, _, ts)| *ts).max() else {
-			return Ok(());
+			return Ok((false, false));
 		};
 
 		if Some(input_timestamp) <= output_timestamp {
@@ -104,7 +104,7 @@ impl<'a> TileMipmapper<'a> {
 					.expect("tile path must be in output directory")
 					.display(),
 			);
-			return Ok(());
+			return Ok((true, false));
 		}
 
 		debug!(
@@ -143,7 +143,9 @@ impl<'a> TileMipmapper<'a> {
 			image
 				.write_to(file, image::ImageFormat::Png)
 				.context("Failed to save image")
-		})
+		})?;
+
+		Ok((true, true))
 	}
 
 	/// Runs the mipmap generation
@@ -165,24 +167,48 @@ impl<'a> TileMipmapper<'a> {
 				break;
 			}
 
+			info!("Generating level {} mipmaps...", level);
+
 			fs::create_dir_all(&self.config.tile_dir(TileKind::Map, level))?;
 			fs::create_dir_all(&self.config.tile_dir(TileKind::Lightmap, level))?;
 
 			let next = Self::map_coords(prev);
 
-			next.0.par_iter().try_for_each(|(&z, xs)| {
-				xs.par_iter().try_for_each(|&x| {
-					let coords = TileCoords { x, z };
-					self.render_mipmap::<image::Rgba<u8>>(TileKind::Map, level, coords, prev)?;
-					self.render_mipmap::<image::LumaA<u8>>(
-						TileKind::Lightmap,
-						level,
-						coords,
-						prev,
-					)?;
-					anyhow::Ok(())
+			let (total, processed) = next
+				.0
+				.par_iter()
+				.flat_map(|(&z, xs)| {
+					let mipmapper = &self;
+					xs.par_iter().map(move |&x| {
+						let coords = TileCoords { x, z };
+						let (found_map, processed_map) = mipmapper
+							.render_mipmap::<image::Rgba<u8>>(TileKind::Map, level, coords, prev)?;
+						let (found_light, processed_light) = mipmapper
+							.render_mipmap::<image::LumaA<u8>>(
+								TileKind::Lightmap,
+								level,
+								coords,
+								prev,
+							)?;
+						anyhow::Ok((
+							usize::from(found_map) + usize::from(found_light),
+							usize::from(processed_map) + usize::from(processed_light),
+						))
+					})
 				})
-			})?;
+				.try_reduce(
+					|| (0, 0),
+					|(found_a, processed_a), (found_b, processed_b)| {
+						Ok((found_a + found_b, processed_a + processed_b))
+					},
+				)?;
+
+			info!(
+				"Generated level {} mipmaps ({} processed, {} unchanged)",
+				level,
+				processed,
+				total - processed,
+			);
 
 			tile_stack.push(next);
 		}

src/core/tile_renderer.rs

@@ -12,7 +12,7 @@ use glam::Vec3;
 use lru::LruCache;
 use rayon::prelude::*;
 use tokio::sync::OnceCell;
-use tracing::debug;
+use tracing::{debug, info};
 
 use super::{common::*, region_group::RegionGroup};
 use crate::{
@@ -263,7 +263,7 @@ impl<'a> TileRenderer<'a> {
 	}
 
 	/// Renders and saves a region tile image
-	fn render_tile(&self, coords: TileCoords) -> Result<()> {
+	fn render_tile(&self, coords: TileCoords) -> Result<bool> {
 		/// Width/height of a tile image
 		const N: u32 = (BLOCKS_PER_CHUNK * CHUNKS_PER_REGION) as u32;
 
@@ -280,7 +280,7 @@ impl<'a> TileRenderer<'a> {
 					.expect("tile path must be in output directory")
 					.display(),
 			);
-			return Ok(());
+			return Ok(false);
 		}
 
 		debug!(
@@ -307,18 +307,35 @@ impl<'a> TileRenderer<'a> {
 					.write_to(file, image::ImageFormat::Png)
 					.context("Failed to save image")
 			},
-		)
+		)?;
+
+		Ok(true)
 	}
 
 	/// Runs the tile generation
 	pub fn run(self) -> Result<()> {
 		fs::create_dir_all(&self.config.tile_dir(TileKind::Map, 0))?;
 
+		info!("Rendering map tiles...");
+
 		// Use par_bridge to process items in order (for better use of region cache)
-		self.regions.iter().par_bridge().try_for_each(|&coords| {
-			self.render_tile(coords)
-				.with_context(|| format!("Failed to render tile {:?}", coords))
-		})?;
+		let processed = self
+			.regions
+			.iter()
+			.par_bridge()
+			.map(|&coords| {
+				anyhow::Ok(usize::from(
+					self.render_tile(coords)
+						.with_context(|| format!("Failed to render tile {:?}", coords))?,
+				))
+			})
+			.try_reduce(|| 0, |a, b| Ok(a + b))?;
+
+		info!(
+			"Rendered map tiles ({} processed, {} unchanged)",
+			processed,
+			self.regions.len() - processed,
+		);
 
 		Ok(())
 	}